mirror of
https://github.com/lifting-bits/remill
synced 2026-06-21 13:56:07 +00:00
Peter Goodman
99df2e19d4
* Running clang-format on files with some additional custom scripts for my style * Fix missing unique_ptr in remill/BC/Optimizer.h * Fixes and selective disabling of clang-format
4676 lines
155 KiB
C++
4676 lines
155 KiB
C++
/*
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* Copyright (c) 2017 Trail of Bits, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gflags/gflags.h>
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#include <glog/logging.h>
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#include <llvm/ADT/Triple.h>
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#include <llvm/IR/Attributes.h>
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#include <llvm/IR/Function.h>
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#include <llvm/IR/Module.h>
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#include <algorithm>
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#include <cctype>
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#include <iomanip>
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#include <map>
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#include <memory>
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#include <sstream>
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#include <string>
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#define REMILL_AARCH_STRICT_REGNUM
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#include "remill/Arch/AArch64/Decode.h"
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#include "remill/Arch/Arch.h"
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#include "remill/Arch/Instruction.h"
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#include "remill/Arch/Name.h"
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#include "remill/BC/Version.h"
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#include "remill/OS/OS.h"
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namespace remill {
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namespace {
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static constexpr int kInstructionSize = 4; // In bytes.
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static constexpr int kPCWidth = 64; // In bits.
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template <uint32_t bit, typename T>
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static inline T Select(T val) {
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return (val >> bit) & T(1);
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}
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Instruction::Category InstCategory(const aarch64::InstData &inst) {
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switch (inst.iclass) {
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case aarch64::InstName::INVALID: return Instruction::kCategoryInvalid;
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// TODO(pag): B.cond.
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case aarch64::InstName::B:
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if (aarch64::InstForm::B_ONLY_CONDBRANCH == inst.iform) {
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return Instruction::kCategoryConditionalBranch;
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} else {
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return Instruction::kCategoryDirectJump;
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}
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case aarch64::InstName::BR: return Instruction::kCategoryIndirectJump;
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case aarch64::InstName::CBZ:
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case aarch64::InstName::CBNZ:
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case aarch64::InstName::TBZ:
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case aarch64::InstName::TBNZ:
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return Instruction::kCategoryConditionalBranch;
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case aarch64::InstName::BL: return Instruction::kCategoryDirectFunctionCall;
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case aarch64::InstName::BLR:
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return Instruction::kCategoryIndirectFunctionCall;
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case aarch64::InstName::RET: return Instruction::kCategoryFunctionReturn;
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case aarch64::InstName::HLT: return Instruction::kCategoryError;
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case aarch64::InstName::HVC:
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case aarch64::InstName::SMC:
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case aarch64::InstName::SVC:
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case aarch64::InstName::SYS: // Has aliases `IC`, `DC`, `AT`, and `TLBI`.
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case aarch64::InstName::SYSL: return Instruction::kCategoryAsyncHyperCall;
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case aarch64::InstName::HINT:
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case aarch64::InstName::NOP: return Instruction::kCategoryNoOp;
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// Note: These are implemented with synchronous hyper calls.
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case aarch64::InstName::BRK: return Instruction::kCategoryNormal;
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default: return Instruction::kCategoryNormal;
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}
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}
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class AArch64Arch final : public Arch {
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public:
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AArch64Arch(llvm::LLVMContext *context_, OSName os_name_,
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ArchName arch_name_);
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virtual ~AArch64Arch(void);
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// Returns the name of the stack pointer register.
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const char *StackPointerRegisterName(void) const final;
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// Returns the name of the program counter register.
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const char *ProgramCounterRegisterName(void) const final;
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// Decode an instruction.
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bool DecodeInstruction(uint64_t address, std::string_view instr_bytes,
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Instruction &inst) const final;
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// Maximum number of bytes in an instruction.
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uint64_t MaxInstructionSize(void) const final;
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llvm::Triple Triple(void) const final;
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llvm::DataLayout DataLayout(void) const final;
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// Default calling convention for this architecture.
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llvm::CallingConv::ID DefaultCallingConv(void) const final;
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private:
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AArch64Arch(void) = delete;
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};
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AArch64Arch::AArch64Arch(llvm::LLVMContext *context_, OSName os_name_,
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ArchName arch_name_)
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: Arch(context_, os_name_, arch_name_) {}
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AArch64Arch::~AArch64Arch(void) {}
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// Default calling convention for this architecture.
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llvm::CallingConv::ID AArch64Arch::DefaultCallingConv(void) const {
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return llvm::CallingConv::C;
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}
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// Maximum number of bytes in an instruction for this particular architecture.
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uint64_t AArch64Arch::MaxInstructionSize(void) const {
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return 4;
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}
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llvm::Triple AArch64Arch::Triple(void) const {
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auto triple = BasicTriple();
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switch (arch_name) {
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case kArchAArch64LittleEndian: triple.setArch(llvm::Triple::aarch64); break;
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default:
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LOG(FATAL) << "Cannot get triple for non-AArch64 architecture "
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<< GetArchName(arch_name);
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break;
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}
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return triple;
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}
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llvm::DataLayout AArch64Arch::DataLayout(void) const {
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std::string dl;
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switch (arch_name) {
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case kArchAArch64LittleEndian:
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dl = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128";
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break;
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default:
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LOG(FATAL) << "Cannot get data layout for non-AArch64 architecture "
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<< GetArchName(arch_name);
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break;
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}
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return llvm::DataLayout(dl);
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}
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enum RegClass {
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kRegX, // 64-bit int.
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kRegW, // Word, 32-bit int.
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kRegB, // Byte.
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kRegH, // Half-word, 16-bit float.
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kRegS, // Single-precision float.
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kRegD, // Doubleword, Double precision float.
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kRegQ, // Quadword.
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kRegV, // V reg containing Q, D, S, H, and B.
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};
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enum RegUsage {
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kUseAsAddress, // Interpret X31 == SP and W32 == WSP.
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kUseAsValue // Interpret X31 == XZR and W31 == WZR.
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};
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enum Action { kActionRead, kActionWrite, kActionReadWrite };
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// Immediate integer type.
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enum ImmType { kUnsigned, kSigned };
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// Note: Order is significant; extracted bits may be casted to this type.
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enum Extend : uint8_t {
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kExtendUXTB, // 0b000
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kExtendUXTH, // 0b001
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kExtendUXTW, // 0b010
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kExtendUXTX, // 0b011
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kExtendSXTB, // 0b100
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kExtendSXTH, // 0b101
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kExtendSXTW, // 0b110
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kExtendSXTX // 0b111
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};
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static uint64_t ExtractSizeInBits(Extend extend) {
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switch (extend) {
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case kExtendUXTB: return 8;
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case kExtendUXTH: return 16;
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case kExtendUXTW: return 32;
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case kExtendUXTX: return 64;
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case kExtendSXTB: return 8;
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case kExtendSXTH: return 16;
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case kExtendSXTW: return 32;
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case kExtendSXTX: return 64;
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}
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return 0;
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}
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static RegClass ExtendTypeToRegClass(Extend extend) {
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switch (extend) {
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case kExtendUXTB: return kRegW;
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case kExtendUXTH: return kRegW;
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case kExtendUXTW: return kRegW;
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case kExtendUXTX: return kRegX;
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case kExtendSXTB: return kRegW;
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case kExtendSXTH: return kRegW;
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case kExtendSXTW: return kRegW;
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case kExtendSXTX: return kRegX;
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}
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}
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static Operand::ShiftRegister::Extend ShiftRegExtendType(Extend extend) {
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switch (extend) {
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case kExtendUXTB:
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case kExtendUXTH:
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case kExtendUXTW:
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case kExtendUXTX: return Operand::ShiftRegister::kExtendUnsigned;
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case kExtendSXTB:
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case kExtendSXTH:
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case kExtendSXTW:
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case kExtendSXTX: return Operand::ShiftRegister::kExtendSigned;
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}
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return Operand::ShiftRegister::kExtendInvalid;
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}
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// Note: Order is significant; extracted bits may be casted to this type.
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enum Shift : uint8_t { kShiftLSL, kShiftLSR, kShiftASR, kShiftROR };
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// Translate a shift encoding into an operand shift type used by the shift
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// register class.
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static Operand::ShiftRegister::Shift GetOperandShift(Shift s) {
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switch (s) {
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case kShiftLSL: return Operand::ShiftRegister::kShiftLeftWithZeroes;
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case kShiftLSR: return Operand::ShiftRegister::kShiftUnsignedRight;
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case kShiftASR: return Operand::ShiftRegister::kShiftSignedRight;
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case kShiftROR: return Operand::ShiftRegister::kShiftRightAround;
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}
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return Operand::ShiftRegister::kShiftInvalid;
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}
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// Get the name of an integer register.
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static std::string RegNameXW(Action action, RegClass rclass, RegUsage rtype,
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aarch64::RegNum number_) {
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auto number = static_cast<uint8_t>(number_);
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CHECK_LE(number, 31U);
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std::stringstream ss;
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CHECK(kActionReadWrite != action);
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if (31 == number) {
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if (rtype == kUseAsValue) {
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if (action == kActionWrite) {
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ss << "IGNORE_WRITE_TO_XZR";
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} else {
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ss << (rclass == kRegX ? "XZR" : "WZR");
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}
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} else {
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if (action == kActionWrite) {
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ss << "SP";
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} else {
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ss << (rclass == kRegX ? "SP" : "WSP");
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}
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}
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} else {
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if (action == kActionWrite) {
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ss << "X";
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} else {
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ss << (rclass == kRegX ? "X" : "W");
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}
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ss << static_cast<unsigned>(number);
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}
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return ss.str();
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}
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// Get the name of a floating point register.
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static std::string RegNameFP(Action action, RegClass rclass, RegUsage rtype,
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aarch64::RegNum number_) {
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auto number = static_cast<uint8_t>(number_);
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CHECK_LE(number, 31U);
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std::stringstream ss;
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CHECK(kActionReadWrite != action);
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if (kActionRead == action) {
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if (kRegB == rclass) {
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ss << "B";
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} else if (kRegH == rclass) {
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ss << "H";
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} else if (kRegS == rclass) {
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ss << "S";
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} else if (kRegD == rclass) {
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ss << "D";
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} else if (kRegQ == rclass) {
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ss << "Q";
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} else {
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CHECK(kRegV == rclass);
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ss << "V";
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}
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} else {
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ss << "V";
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}
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ss << static_cast<unsigned>(number);
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return ss.str();
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}
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static std::string RegName(Action action, RegClass rclass, RegUsage rtype,
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aarch64::RegNum number) {
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switch (rclass) {
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case kRegX:
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case kRegW: return RegNameXW(action, rclass, rtype, number);
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case kRegB:
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case kRegH:
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case kRegS:
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case kRegD:
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case kRegQ:
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case kRegV: return RegNameFP(action, rclass, rtype, number);
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}
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}
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static uint64_t ReadRegSize(RegClass rclass) {
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switch (rclass) {
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case kRegX: return 64;
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case kRegW: return 32;
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case kRegB: return 8;
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case kRegH: return 16;
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case kRegS: return 32;
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case kRegD: return 64;
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case kRegQ:
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case kRegV: return 128;
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}
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return 0;
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}
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static uint64_t WriteRegSize(RegClass rclass) {
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switch (rclass) {
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case kRegX:
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case kRegW: return 64;
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case kRegB:
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case kRegH:
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case kRegS:
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case kRegD:
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case kRegQ:
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case kRegV: return 128;
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}
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return 0;
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}
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// This gives us a register operand. If we have an operand like `<Xn|SP>`,
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// then the usage is `kTypeUsage`, otherwise (i.e. `<Xn>`), the usage is
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// a `kTypeValue`.
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static Operand::Register Reg(Action action, RegClass rclass, RegUsage rtype,
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aarch64::RegNum reg_num) {
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Operand::Register reg;
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if (kActionWrite == action) {
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reg.name = RegName(action, rclass, rtype, reg_num);
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reg.size = WriteRegSize(rclass);
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} else if (kActionRead == action) {
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reg.name = RegName(action, rclass, rtype, reg_num);
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reg.size = ReadRegSize(rclass);
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} else {
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LOG(FATAL) << "Reg function only takes a simple read or write action.";
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}
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return reg;
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}
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static void AddRegOperand(Instruction &inst, Action action, RegClass rclass,
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RegUsage rtype, aarch64::RegNum reg_num) {
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Operand op;
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op.type = Operand::kTypeRegister;
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if (kActionWrite == action || kActionReadWrite == action) {
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op.reg = Reg(kActionWrite, rclass, rtype, reg_num);
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op.size = op.reg.size;
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op.action = Operand::kActionWrite;
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inst.operands.push_back(op);
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}
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if (kActionRead == action || kActionReadWrite == action) {
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op.reg = Reg(kActionRead, rclass, rtype, reg_num);
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op.size = op.reg.size;
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op.action = Operand::kActionRead;
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inst.operands.push_back(op);
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}
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}
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static void AddShiftRegOperand(Instruction &inst, RegClass rclass,
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RegUsage rtype, aarch64::RegNum reg_num,
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Shift shift_type, uint64_t shift_size) {
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if (!shift_size) {
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AddRegOperand(inst, kActionRead, rclass, rtype, reg_num);
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} else {
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Operand op;
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op.shift_reg.reg = Reg(kActionRead, rclass, rtype, reg_num);
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op.shift_reg.shift_op = GetOperandShift(shift_type);
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op.shift_reg.shift_size = shift_size;
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op.type = Operand::kTypeShiftRegister;
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op.size = op.shift_reg.reg.size;
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op.action = Operand::kActionRead;
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inst.operands.push_back(op);
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}
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}
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// Add an extend register operand, e.g. `(<Wm>|<Xm>){, <extend> {<amount>}}`.
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//
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// NOTE(pag): `rclass` is explicitly passed instead of inferred because some
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// instructions, e.g. `ADD_32_ADDSUB_EXT` specify `Wm` only.
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static void AddExtendRegOperand(Instruction &inst, RegClass reg_class,
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RegUsage rtype, aarch64::RegNum reg_num,
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Extend extend_type, uint64_t output_size,
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uint64_t shift_size = 0) {
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Operand op;
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op.shift_reg.reg = Reg(kActionRead, reg_class, rtype, reg_num);
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op.shift_reg.extend_op = ShiftRegExtendType(extend_type);
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op.shift_reg.extract_size = ExtractSizeInBits(extend_type);
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// No extraction needs to be done, and zero extension already happens.
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if (Operand::ShiftRegister::kExtendUnsigned == op.shift_reg.extend_op &&
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op.shift_reg.extract_size == op.shift_reg.reg.size) {
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op.shift_reg.extend_op = Operand::ShiftRegister::kExtendInvalid;
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op.shift_reg.extract_size = 0;
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// Extracting a value that is wider than the register.
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} else if (op.shift_reg.extract_size > op.shift_reg.reg.size) {
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op.shift_reg.extend_op = Operand::ShiftRegister::kExtendInvalid;
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op.shift_reg.extract_size = 0;
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}
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if (shift_size) {
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op.shift_reg.shift_op = Operand::ShiftRegister::kShiftLeftWithZeroes;
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op.shift_reg.shift_size = shift_size;
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}
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op.type = Operand::kTypeShiftRegister;
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op.size = output_size;
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op.action = Operand::kActionRead;
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inst.operands.push_back(op);
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}
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static void AddImmOperand(Instruction &inst, uint64_t val,
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ImmType signedness = kUnsigned, unsigned size = 64) {
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Operand op;
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op.type = Operand::kTypeImmediate;
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op.action = Operand::kActionRead;
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op.size = size;
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op.imm.is_signed = signedness == kUnsigned ? false : true;
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op.imm.val = val;
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inst.operands.push_back(op);
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}
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static void AddMonitorOperand(Instruction &inst) {
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Operand op;
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op.action = Operand::kActionWrite;
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op.reg.name = "MONITOR";
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op.reg.size = 64;
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op.size = 64;
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op.type = Operand::kTypeRegister;
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inst.operands.push_back(op);
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}
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static void AddPCRegOp(Instruction &inst, Operand::Action action, int64_t disp,
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Operand::Address::Kind op_kind) {
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Operand op;
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op.type = Operand::kTypeAddress;
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op.size = 64;
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op.addr.address_size = 64;
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op.addr.base_reg.name = "PC";
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op.addr.base_reg.size = 64;
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op.addr.displacement = disp;
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op.addr.kind = op_kind;
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op.action = action;
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inst.operands.push_back(op);
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}
|
|
|
|
// Emit a memory read or write operand of the form `[PC + disp]`.
|
|
static void AddPCRegMemOp(Instruction &inst, Action action, int64_t disp) {
|
|
if (kActionRead == action) {
|
|
AddPCRegOp(inst, Operand::kActionRead, disp, Operand::Address::kMemoryRead);
|
|
} else if (kActionWrite == action) {
|
|
AddPCRegOp(inst, Operand::kActionWrite, disp,
|
|
Operand::Address::kMemoryWrite);
|
|
} else {
|
|
LOG(FATAL) << __FUNCTION__ << " only accepts simple operand actions.";
|
|
}
|
|
}
|
|
|
|
// Emit an address operand that computes `PC + disp`.
|
|
static void AddPCDisp(Instruction &inst, int64_t disp) {
|
|
AddPCRegOp(inst, Operand::kActionRead, disp,
|
|
Operand::Address::kAddressCalculation);
|
|
}
|
|
|
|
static void AddNextPC(Instruction &inst) {
|
|
|
|
// add +4 as the PC displacement
|
|
// emit an address computation operand
|
|
AddPCDisp(inst, kInstructionSize);
|
|
}
|
|
|
|
// Base+offset memory operands are equivalent to indexing into an array.
|
|
//
|
|
// We have something like this:
|
|
// [<Xn|SP>, #<imm>]
|
|
//
|
|
// Which gets is:
|
|
// addr = Xn + imm
|
|
// ... deref addr and do stuff ...
|
|
static void AddBasePlusOffsetMemOp(Instruction &inst, Action action,
|
|
uint64_t access_size,
|
|
aarch64::RegNum base_reg, uint64_t disp) {
|
|
Operand op;
|
|
op.type = Operand::kTypeAddress;
|
|
op.size = access_size;
|
|
op.addr.address_size = 64;
|
|
op.addr.base_reg = Reg(kActionRead, kRegX, kUseAsAddress, base_reg);
|
|
op.addr.displacement = disp;
|
|
|
|
if (kActionWrite == action || kActionReadWrite == action) {
|
|
op.action = Operand::kActionWrite;
|
|
op.addr.kind = Operand::Address::kMemoryWrite;
|
|
inst.operands.push_back(op);
|
|
}
|
|
|
|
if (kActionRead == action || kActionReadWrite == action) {
|
|
op.action = Operand::kActionRead;
|
|
op.addr.kind = Operand::Address::kMemoryRead;
|
|
inst.operands.push_back(op);
|
|
}
|
|
}
|
|
|
|
static constexpr auto kInvalidReg = static_cast<aarch64::RegNum>(0xFF);
|
|
|
|
// Pre-index memory operands write back the result of the displaced address
|
|
// to the base register.
|
|
//
|
|
// We have something like this:
|
|
// [<Xn|SP>, #<imm>]!
|
|
//
|
|
// Which gets us:
|
|
// addr = Xn + imm
|
|
// ... deref addr and do stuff ...
|
|
// Xn = addr + imm
|
|
//
|
|
// So we add in two operands: one that is a register write operand for Xn,
|
|
// the other that is the value of (Xn + imm + imm).
|
|
static void AddPreIndexMemOp(Instruction &inst, Action action,
|
|
uint64_t access_size, aarch64::RegNum base_reg,
|
|
uint64_t disp,
|
|
aarch64::RegNum dest_reg1 = kInvalidReg,
|
|
aarch64::RegNum dest_reg2 = kInvalidReg) {
|
|
AddBasePlusOffsetMemOp(inst, action, access_size, base_reg, disp);
|
|
auto addr_op = inst.operands[inst.operands.size() - 1];
|
|
|
|
Operand reg_op;
|
|
reg_op.type = Operand::kTypeRegister;
|
|
reg_op.action = Operand::kActionWrite;
|
|
|
|
// We don't care about the case of `31` because then `base_reg` will be
|
|
// `SP`, but `dest_reg1` or `dest_reg2` (if they are 31), will represent
|
|
// one of `WZR` or `ZR`.
|
|
if (static_cast<uint8_t>(base_reg) != 31 &&
|
|
(dest_reg1 == base_reg || dest_reg2 == base_reg)) {
|
|
reg_op.reg.name = "SUPPRESS_WRITEBACK";
|
|
reg_op.reg.size = 64;
|
|
} else {
|
|
reg_op.reg = Reg(kActionWrite, kRegX, kUseAsAddress, base_reg);
|
|
}
|
|
|
|
reg_op.size = reg_op.reg.size;
|
|
inst.operands.push_back(reg_op);
|
|
|
|
addr_op.action = Operand::kActionRead;
|
|
addr_op.addr.kind = Operand::Address::kAddressCalculation;
|
|
inst.operands.push_back(addr_op);
|
|
}
|
|
|
|
// Post-index memory operands write back the result of the displaced address
|
|
// to the base register.
|
|
//
|
|
// We have something like this:
|
|
// [<Xn|SP>], #<imm>
|
|
//
|
|
// Which gets us:
|
|
// addr = Xn
|
|
// ... deref addr and do stuff ...
|
|
// Xn = addr + imm
|
|
//
|
|
// So we add in two operands: one that is a register write operand for Xn,
|
|
// the other that is the value of (Xn + imm).
|
|
static void AddPostIndexMemOp(Instruction &inst, Action action,
|
|
uint64_t access_size, aarch64::RegNum base_reg,
|
|
uint64_t disp,
|
|
aarch64::RegNum dest_reg1 = kInvalidReg,
|
|
aarch64::RegNum dest_reg2 = kInvalidReg) {
|
|
AddBasePlusOffsetMemOp(inst, action, access_size, base_reg, 0);
|
|
auto addr_op = inst.operands[inst.operands.size() - 1];
|
|
|
|
Operand reg_op;
|
|
reg_op.type = Operand::kTypeRegister;
|
|
reg_op.action = Operand::kActionWrite;
|
|
|
|
// We don't care about the case of `31` because then `base_reg` will be
|
|
// `SP`, but `dest_reg1` or `dest_reg2` (if they are 31), will represent
|
|
// one of `WZR` or `ZR`.
|
|
if (static_cast<uint8_t>(base_reg) != 31 &&
|
|
(dest_reg1 == base_reg || dest_reg2 == base_reg)) {
|
|
reg_op.reg.name = "SUPPRESS_WRITEBACK";
|
|
reg_op.reg.size = 64;
|
|
} else {
|
|
reg_op.reg = Reg(kActionWrite, kRegX, kUseAsAddress, base_reg);
|
|
}
|
|
|
|
reg_op.size = reg_op.reg.size;
|
|
inst.operands.push_back(reg_op);
|
|
|
|
addr_op.size = 64;
|
|
addr_op.action = Operand::kActionRead;
|
|
addr_op.addr.kind = Operand::Address::kAddressCalculation;
|
|
addr_op.addr.displacement = disp;
|
|
inst.operands.push_back(addr_op);
|
|
}
|
|
|
|
// Post-index memory operands write back the result of the displaced address
|
|
// to the base register.
|
|
//
|
|
// We have something like this:
|
|
// [<Xn|SP>], <Xm>
|
|
//
|
|
// Which gets us:
|
|
// addr = Xn
|
|
// ... deref addr and do stuff ...
|
|
// Xn = addr + Xm
|
|
//
|
|
// So we add in two operands: one that is a register write operand for Xn,
|
|
// the other that is the value of (Xn + imm).
|
|
static void AddPostIndexMemOp(Instruction &inst, Action action,
|
|
uint64_t access_size, aarch64::RegNum base_reg,
|
|
aarch64::RegNum disp_reg,
|
|
aarch64::RegNum dest_reg1 = kInvalidReg,
|
|
aarch64::RegNum dest_reg2 = kInvalidReg) {
|
|
AddBasePlusOffsetMemOp(inst, action, access_size, base_reg, 0);
|
|
auto addr_op = inst.operands[inst.operands.size() - 1];
|
|
|
|
Operand reg_op;
|
|
reg_op.type = Operand::kTypeRegister;
|
|
reg_op.action = Operand::kActionWrite;
|
|
|
|
// We don't care about the case of `31` because then `base_reg` will be
|
|
// `SP`, but `dest_reg1` or `dest_reg2` (if they are 31), will represent
|
|
// one of `WZR` or `ZR`.
|
|
if (static_cast<uint8_t>(base_reg) != 31 &&
|
|
(dest_reg1 == base_reg || dest_reg2 == base_reg)) {
|
|
reg_op.reg.name = "SUPPRESS_WRITEBACK";
|
|
reg_op.reg.size = 64;
|
|
} else {
|
|
reg_op.reg = Reg(kActionWrite, kRegX, kUseAsAddress, base_reg);
|
|
}
|
|
|
|
reg_op.size = reg_op.reg.size;
|
|
inst.operands.push_back(reg_op);
|
|
|
|
addr_op.size = 64;
|
|
addr_op.action = Operand::kActionRead;
|
|
addr_op.addr.kind = Operand::Address::kAddressCalculation;
|
|
addr_op.addr.scale = 1;
|
|
addr_op.addr.index_reg = Reg(kActionRead, kRegX, kUseAsAddress, disp_reg);
|
|
inst.operands.push_back(addr_op);
|
|
}
|
|
|
|
static bool MostSignificantSetBit(uint64_t val, uint64_t *highest_out) {
|
|
#if __has_builtin(__builtin_clzll)
|
|
if (val) {
|
|
*highest_out =
|
|
63 - (__builtin_clzll(val) - (sizeof(unsigned long long) * 8 - 64));
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
#else
|
|
auto found = false;
|
|
for (uint64_t i = 0; i < 64; ++i) {
|
|
if ((val >> i) & 1) {
|
|
*highest_out = i;
|
|
found = true;
|
|
}
|
|
}
|
|
return found;
|
|
#endif
|
|
}
|
|
|
|
static bool LeastSignificantSetBit(uint64_t val, uint64_t *highest_out) {
|
|
#if __has_builtin(__builtin_ctzll)
|
|
if (val) {
|
|
*highest_out = __builtin_ctzll(val);
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
#else
|
|
for (uint64_t i = 0; i < 64; ++i) {
|
|
if ((val >> i) & 1) {
|
|
*highest_out = i;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
#endif // __has_builtin(__builtin_ctzll)
|
|
}
|
|
|
|
static constexpr uint64_t kOne = static_cast<uint64_t>(1);
|
|
|
|
inline static uint64_t Ones(uint64_t val) {
|
|
uint64_t out = 0;
|
|
for (; val != 0; --val) {
|
|
out <<= kOne;
|
|
out |= kOne;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
static uint64_t ROR(uint64_t val, uint64_t val_size, uint64_t rotate_amount) {
|
|
for (uint64_t i = 0; i < rotate_amount; ++i) {
|
|
val = ((val & kOne) << (val_size - kOne)) | (val >> kOne);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
// Take a bit string `val` of length `val_size` bits, and concatenate it to
|
|
// itself until it occupies at least `goal_size` bits.
|
|
static uint64_t Replicate(uint64_t val, uint64_t val_size, uint64_t goal_size) {
|
|
uint64_t replicated_val = 0;
|
|
for (uint64_t i = 0; i < goal_size; i += val_size) {
|
|
replicated_val = (replicated_val << val_size) | val;
|
|
}
|
|
return replicated_val;
|
|
}
|
|
|
|
// Decode bitfield and logical immediate masks. There is a nice piece of code
|
|
// here for producing all valid (64-bit) inputs:
|
|
//
|
|
// https://stackoverflow.com/a/33265035/247591
|
|
//
|
|
// The gist of the format is that you hav
|
|
static bool DecodeBitMasks(uint64_t N /* one bit */,
|
|
uint64_t imms /* six bits */,
|
|
uint64_t immr /* six bits */, bool is_immediate,
|
|
uint64_t data_size, uint64_t *wmask_out = nullptr,
|
|
uint64_t *tmask_out = nullptr) {
|
|
uint64_t len = 0;
|
|
if (!MostSignificantSetBit((N << 6ULL) | (~imms & 0x3fULL), &len)) {
|
|
return false;
|
|
}
|
|
if (len < 1) {
|
|
return false;
|
|
}
|
|
|
|
const uint64_t esize = kOne << len;
|
|
if (esize > data_size) {
|
|
return false; // `len == 0` is a `ReservedValue()`.
|
|
}
|
|
|
|
const uint64_t levels = Ones(len); // ZeroExtend(Ones(len), 6).
|
|
const uint64_t R = immr & levels;
|
|
const uint64_t S = imms & levels;
|
|
|
|
if (is_immediate && S == levels) {
|
|
return false; // ReservedValue.
|
|
}
|
|
|
|
const uint64_t diff = (S - R) & static_cast<uint64_t>(0x3F); // 6-bit sbb.
|
|
const uint64_t d = diff & levels; // `diff<len-1:0>`.
|
|
const uint64_t welem = Ones(S + kOne);
|
|
const uint64_t telem = Ones(d + kOne);
|
|
const uint64_t wmask = Replicate(ROR(welem, esize, R), esize, data_size);
|
|
const uint64_t tmask = Replicate(telem, esize, data_size);
|
|
|
|
if (wmask_out) {
|
|
*wmask_out = wmask;
|
|
}
|
|
|
|
if (tmask_out) {
|
|
*tmask_out = tmask;
|
|
}
|
|
return true;
|
|
}
|
|
// Utility function for extracting [From, To] bits from a uint32_t.
|
|
static inline uint64_t Extract(uint64_t bits, unsigned from, unsigned to) {
|
|
CHECK(from < 64 && to < 64 && from >= to);
|
|
return (bits >> to) & ((1 << (from - to + 1)) - 1);
|
|
}
|
|
|
|
static uint64_t VFPExpandImmToFloat32(uint64_t imm) {
|
|
uint64_t result = 0;
|
|
uint64_t bit6 = Extract(imm, 6, 6);
|
|
result |= Extract(imm, 7, 7) << 31;
|
|
result |= Extract(imm, 5, 0) << 19;
|
|
result |= bit6 ? (0x1FULL << 25) : (0x1ULL << 30);
|
|
return result;
|
|
}
|
|
|
|
static uint64_t VFPExpandImmToFloat64(uint64_t imm) {
|
|
uint64_t result = 0;
|
|
uint64_t bit6 = Extract(imm, 6, 6);
|
|
result |= Extract(imm, 7, 7) << 63;
|
|
result |= Extract(imm, 5, 0) << 48;
|
|
result |= bit6 ? (0xFFULL << 54) : (0x1ULL << 62);
|
|
return result;
|
|
}
|
|
|
|
// Returns the name of the stack pointer register.
|
|
const char *AArch64Arch::StackPointerRegisterName(void) const {
|
|
return "SP";
|
|
}
|
|
|
|
// Returns the name of the program counter register.
|
|
const char *AArch64Arch::ProgramCounterRegisterName(void) const {
|
|
return "PC";
|
|
}
|
|
|
|
bool AArch64Arch::DecodeInstruction(uint64_t address,
|
|
std::string_view inst_bytes,
|
|
Instruction &inst) const {
|
|
|
|
aarch64::InstData dinst = {};
|
|
auto bytes = reinterpret_cast<const uint8_t *>(inst_bytes.data());
|
|
|
|
inst.arch_name = arch_name;
|
|
inst.pc = address;
|
|
inst.next_pc = address + kInstructionSize;
|
|
inst.category = Instruction::kCategoryInvalid;
|
|
|
|
if (kInstructionSize != inst_bytes.size()) {
|
|
inst.category = Instruction::kCategoryInvalid;
|
|
return false;
|
|
|
|
} else if (0 != (address % kInstructionSize)) {
|
|
inst.category = Instruction::kCategoryInvalid;
|
|
return false;
|
|
|
|
} else if (!aarch64::TryExtract(bytes, dinst)) {
|
|
inst.category = Instruction::kCategoryInvalid;
|
|
return false;
|
|
}
|
|
|
|
if (!inst.bytes.empty() && inst.bytes.data() == inst_bytes.data()) {
|
|
CHECK_LE(kInstructionSize, inst.bytes.size());
|
|
inst.bytes.resize(kInstructionSize);
|
|
} else {
|
|
inst.bytes = inst_bytes.substr(0, kInstructionSize);
|
|
}
|
|
|
|
inst.category = InstCategory(dinst);
|
|
inst.function = aarch64::InstFormToString(dinst.iform);
|
|
|
|
if (!aarch64::TryDecode(dinst, inst)) {
|
|
inst.category = Instruction::kCategoryInvalid;
|
|
return false;
|
|
}
|
|
|
|
// The semantics will store the return address in `RETURN_PC`. This is to
|
|
// help synchronize program counters when lifting instructions on an ISA
|
|
// with delay slots.
|
|
if (inst.IsFunctionCall()) {
|
|
inst.operands.emplace_back();
|
|
auto &dst_ret_pc = inst.operands.back();
|
|
dst_ret_pc.type = Operand::kTypeRegister;
|
|
dst_ret_pc.action = Operand::kActionWrite;
|
|
dst_ret_pc.size = 64;
|
|
dst_ret_pc.reg.name = "RETURN_PC";
|
|
dst_ret_pc.reg.size = 64;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
namespace aarch64 {
|
|
namespace {
|
|
|
|
static uint64_t DecodeScale(const InstData &data) {
|
|
uint64_t scale = ((data.opc & 0x2ULL) << 1ULL) | data.size;
|
|
return scale;
|
|
}
|
|
|
|
// <OPCODE> <Xd>, <Xn>
|
|
static bool TryDecodeRdW_Rn(const InstData &data, Instruction &inst,
|
|
RegClass rclass) {
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// <OPCODE> <Xd>, <Xn>, <Xm>
|
|
static bool TryDecodeRdW_Rn_Rm(const InstData &data, Instruction &inst,
|
|
RegClass rclass) {
|
|
TryDecodeRdW_Rn(data, inst, rclass);
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rm);
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
// RET {<Xn>}
|
|
bool TryDecodeRET_64R_BRANCH_REG(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// BLR <Xn>
|
|
bool TryDecodeBLR_64_BRANCH_REG(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddNextPC(inst);
|
|
return true;
|
|
}
|
|
|
|
// STLR <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeSTLR_SL32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 32, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// STP <Wt1>, <Wt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeSTP_32_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt2);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm7.simm7);
|
|
AddPreIndexMemOp(inst, kActionWrite, 64, data.Rn, offset << 2);
|
|
return true;
|
|
}
|
|
|
|
// STP <Xt1>, <Xt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeSTP_64_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt2);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm7.simm7);
|
|
AddPreIndexMemOp(inst, kActionWrite, 128, data.Rn, offset << 3);
|
|
return true;
|
|
}
|
|
|
|
// STP <Wt1>, <Wt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeSTP_32_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt2);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm7.simm7);
|
|
AddPostIndexMemOp(inst, kActionWrite, 64, data.Rn, offset << 2);
|
|
return true;
|
|
}
|
|
|
|
// STP <Xt1>, <Xt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeSTP_64_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt2);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm7.simm7);
|
|
AddPostIndexMemOp(inst, kActionWrite, 128, data.Rn, offset << 3);
|
|
return true;
|
|
}
|
|
|
|
// STP <Wt1>, <Wt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeSTP_32_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2);
|
|
return true;
|
|
}
|
|
|
|
// STP <Xt1>, <Xt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeSTP_64_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 128, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 3);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeSTP_Vn_LDSTPAIR_OFF(const InstData &data,
|
|
Instruction &inst, RegClass rclass) {
|
|
auto size = ReadRegSize(rclass);
|
|
auto scale = 2U + data.opc;
|
|
if (data.opc == 0x3) {
|
|
return false; // `if opc == '11' then UnallocatedEncoding();`.
|
|
}
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, size * 2, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << scale);
|
|
return true;
|
|
}
|
|
|
|
// STP <St1>, <St2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeSTP_S_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTP_Vn_LDSTPAIR_OFF(data, inst, kRegS);
|
|
}
|
|
|
|
// STP <Dt1>, <Dt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeSTP_D_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTP_Vn_LDSTPAIR_OFF(data, inst, kRegD);
|
|
}
|
|
// STP <Qt1>, <Qt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeSTP_Q_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTP_Vn_LDSTPAIR_OFF(data, inst, kRegQ);
|
|
}
|
|
|
|
|
|
// LDP <Wt1>, <Wt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDP_32_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
|
|
// `if L:opc<0> == '01' || opc == '11' then UnallocatedEncoding();`.
|
|
if ((!data.L && (data.opc & 1)) || data.opc == 3) {
|
|
return false;
|
|
}
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt2);
|
|
AddPostIndexMemOp(inst, kActionRead, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2);
|
|
return true;
|
|
}
|
|
|
|
// LDP <Xt1>, <Xt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDP_64_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
|
|
// `if L:opc<0> == '01' || opc == '11' then UnallocatedEncoding();`.
|
|
if ((!data.L && (data.opc & 1)) || data.opc == 3) {
|
|
return false;
|
|
}
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt2);
|
|
AddPostIndexMemOp(inst, kActionRead, 128, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 3);
|
|
return true;
|
|
}
|
|
|
|
//LDPSW <Xt1>, <Xt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDPSW_64_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2);
|
|
return true;
|
|
}
|
|
|
|
// LDPSW <Xt1>, <Xt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDPSW_64_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt2);
|
|
AddPostIndexMemOp(inst, kActionRead, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2);
|
|
return true;
|
|
}
|
|
|
|
// LDPSW <Xt1>, <Xt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeLDPSW_64_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt2);
|
|
AddPreIndexMemOp(inst, kActionRead, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2, data.Rt,
|
|
data.Rt2);
|
|
return true;
|
|
}
|
|
|
|
// LDP <Wt1>, <Wt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeLDP_32_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
|
|
// `if L:opc<0> == '01' || opc == '11' then UnallocatedEncoding();`.
|
|
if ((!data.L && (data.opc & 1)) || data.opc == 3) {
|
|
return false;
|
|
}
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt2);
|
|
AddPreIndexMemOp(inst, kActionRead, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2, data.Rt,
|
|
data.Rt2);
|
|
return true;
|
|
}
|
|
|
|
// LDP <Xt1>, <Xt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeLDP_64_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
|
|
// `if L:opc<0> == '01' || opc == '11' then UnallocatedEncoding();`.
|
|
if ((!data.L && (data.opc & 1)) || data.opc == 3) {
|
|
return false;
|
|
}
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt2);
|
|
AddPreIndexMemOp(inst, kActionRead, 128, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 3, data.Rt,
|
|
data.Rt2);
|
|
return true;
|
|
}
|
|
|
|
// LDP <Wt1>, <Wt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeLDP_32_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
|
|
// `if L:opc<0> == '01' || opc == '11' then UnallocatedEncoding();`.
|
|
if ((!data.L && (data.opc & 1)) || data.opc == 3) {
|
|
return false;
|
|
}
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 64, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 2);
|
|
return true;
|
|
}
|
|
|
|
// LDP <Xt1>, <Xt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeLDP_64_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
|
|
// `if L:opc<0> == '01' || opc == '11' then UnallocatedEncoding();`.
|
|
if ((!data.L && (data.opc & 1)) || data.opc == 3) {
|
|
return false;
|
|
}
|
|
if (data.Rt == data.Rt2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 128, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << 3);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionRead, 32, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Xt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_64_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionRead, 64, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionRead, 32, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Xt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_64_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionRead, 64, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 32, data.Rn, data.imm12.uimm << 2);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Xt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_64_LDST_POS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 64, data.Rn, data.imm12.uimm << 3);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Wt>, <label>
|
|
bool TryDecodeLDR_32_LOADLIT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddPCRegMemOp(inst, kActionRead,
|
|
static_cast<uint64_t>(data.imm19.simm19) << 2ULL);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Xt>, <label>
|
|
bool TryDecodeLDR_64_LOADLIT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddPCRegMemOp(inst, kActionRead,
|
|
static_cast<uint64_t>(data.imm19.simm19) << 2ULL);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeLDR_n_LDST_REGOFF(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
if (!(data.option & 2)) { // Sub word indexing.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`.
|
|
}
|
|
unsigned scale = data.size;
|
|
auto shift = (data.S == 1) ? scale : 0U;
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto rclass = ExtendTypeToRegClass(extend_type);
|
|
AddRegOperand(inst, kActionWrite, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 8U << scale, data.Rn, 0);
|
|
AddExtendRegOperand(inst, rclass, kUseAsValue, data.Rm, extend_type, 64,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Wt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDR_32_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_n_LDST_REGOFF(data, inst, kRegW);
|
|
}
|
|
|
|
// LDR <Xt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDR_64_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_n_LDST_REGOFF(data, inst, kRegX);
|
|
}
|
|
|
|
// STR <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeSTR_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionWrite, 32, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// STR <Xt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeSTR_64_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionWrite, 64, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// STR <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeSTR_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionWrite, 32, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// STR <Xt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeSTR_64_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionWrite, 64, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// STR <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 32, data.Rn,
|
|
data.imm12.uimm << 2 /* size = 2 */);
|
|
return true;
|
|
}
|
|
|
|
// STR <Xt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_64_LDST_POS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 64, data.Rn,
|
|
data.imm12.uimm << 3 /* size = 3 */);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeSTR_n_LDST_REGOFF(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
if (!(data.option & 2)) { // Sub word indexing.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`.
|
|
}
|
|
unsigned scale = data.size;
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto shift = data.S ? scale : 0U;
|
|
AddRegOperand(inst, kActionRead, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 8U << data.size, data.Rn, 0);
|
|
AddExtendRegOperand(inst, ExtendTypeToRegClass(extend_type), kUseAsValue,
|
|
data.Rm, extend_type, 64, shift);
|
|
return true;
|
|
}
|
|
|
|
// STR <Wt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeSTR_32_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_n_LDST_REGOFF(data, inst, kRegW);
|
|
}
|
|
|
|
// STR <Xt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeSTR_64_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_n_LDST_REGOFF(data, inst, kRegX);
|
|
}
|
|
|
|
// MOVZ <Wd>, #<imm>{, LSL #<shift>}
|
|
bool TryDecodeMOVZ_32_MOVEWIDE(const InstData &data, Instruction &inst) {
|
|
if (data.hw & 2) { // Also if `sf` is zero (specifies 32-bit operands).
|
|
return false;
|
|
}
|
|
auto shift = static_cast<uint64_t>(data.hw) << 4U;
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, static_cast<uint32_t>(data.imm16.uimm << shift),
|
|
kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// MOVZ <Xd>, #<imm>{, LSL #<shift>}
|
|
bool TryDecodeMOVZ_64_MOVEWIDE(const InstData &data, Instruction &inst) {
|
|
|
|
auto shift = static_cast<uint64_t>(data.hw) << 4U;
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, (data.imm16.uimm << shift));
|
|
return true;
|
|
}
|
|
|
|
// MOVK <Wd>, #<imm>{, LSL #<shift>}
|
|
bool TryDecodeMOVK_32_MOVEWIDE(const InstData &data, Instruction &inst) {
|
|
if ((data.hw >> 1) & 1) {
|
|
return false; // if sf == '0' && hw<1> == '1' then UnallocatedEncoding();
|
|
}
|
|
AddRegOperand(inst, kActionReadWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, data.imm16.uimm);
|
|
AddImmOperand(inst, data.hw << 4, kUnsigned, 8); // pos = UInt(hw:'0000');
|
|
return true;
|
|
}
|
|
|
|
// MOVK <Xd>, #<imm>{, LSL #<shift>}
|
|
bool TryDecodeMOVK_64_MOVEWIDE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionReadWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, data.imm16.uimm);
|
|
AddImmOperand(inst, data.hw << 4, kUnsigned, 8); // pos = UInt(hw:'0000');
|
|
return true;
|
|
}
|
|
|
|
// MOVN <Wd>, #<imm>{, LSL #<shift>}
|
|
bool TryDecodeMOVN_32_MOVEWIDE(const InstData &data, Instruction &inst) {
|
|
if ((data.hw >> 1) & 1) {
|
|
return false; // if sf == '0' && hw<1> == '1' then UnallocatedEncoding();
|
|
}
|
|
auto shift = static_cast<uint64_t>(data.hw << 4);
|
|
auto imm = data.imm16.uimm << shift;
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, static_cast<uint64_t>(static_cast<uint32_t>(~imm)));
|
|
return true;
|
|
}
|
|
|
|
// MOVN <Xd>, #<imm>{, LSL #<shift>}
|
|
bool TryDecodeMOVN_64_MOVEWIDE(const InstData &data, Instruction &inst) {
|
|
auto shift = static_cast<uint64_t>(data.hw << 4);
|
|
auto imm = data.imm16.uimm << shift;
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, ~imm);
|
|
return true;
|
|
}
|
|
|
|
// ADR <Xd>, <label>
|
|
bool TryDecodeADR_ONLY_PCRELADDR(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddPCDisp(inst, static_cast<int64_t>(data.immhi_immlo.simm21));
|
|
return true;
|
|
}
|
|
|
|
// ADRP <Xd>, <label>
|
|
bool TryDecodeADRP_ONLY_PCRELADDR(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddPCDisp(inst, static_cast<int64_t>(data.immhi_immlo.simm21) << 12ULL);
|
|
return true;
|
|
}
|
|
|
|
// B <label>
|
|
bool TryDecodeB_ONLY_BRANCH_IMM(const InstData &data, Instruction &inst) {
|
|
AddPCDisp(inst, data.imm26.simm26 << 2LL);
|
|
inst.branch_taken_pc = static_cast<uint64_t>(static_cast<int64_t>(inst.pc) +
|
|
(data.imm26.simm26 << 2ULL));
|
|
return true;
|
|
}
|
|
|
|
static void DecodeFallThroughPC(Instruction &inst) {
|
|
Operand not_taken_op = {};
|
|
not_taken_op.action = Operand::kActionRead;
|
|
not_taken_op.type = Operand::kTypeAddress;
|
|
not_taken_op.size = kPCWidth;
|
|
not_taken_op.addr.address_size = kPCWidth;
|
|
not_taken_op.addr.base_reg.name = "PC";
|
|
not_taken_op.addr.base_reg.size = kPCWidth;
|
|
not_taken_op.addr.displacement = kInstructionSize;
|
|
not_taken_op.addr.kind = Operand::Address::kControlFlowTarget;
|
|
inst.operands.push_back(not_taken_op);
|
|
|
|
inst.branch_not_taken_pc = inst.next_pc;
|
|
}
|
|
|
|
// Decode a relative branch target.
|
|
static void DecodeConditionalBranch(Instruction &inst, int64_t disp) {
|
|
|
|
// Condition variable.
|
|
Operand cond_op = {};
|
|
cond_op.action = Operand::kActionWrite;
|
|
cond_op.type = Operand::kTypeRegister;
|
|
cond_op.reg.name = "BRANCH_TAKEN";
|
|
cond_op.reg.size = 8;
|
|
cond_op.size = 8;
|
|
inst.operands.push_back(cond_op);
|
|
|
|
// Taken branch.
|
|
Operand taken_op = {};
|
|
taken_op.action = Operand::kActionRead;
|
|
taken_op.type = Operand::kTypeAddress;
|
|
taken_op.size = kPCWidth;
|
|
taken_op.addr.address_size = kPCWidth;
|
|
taken_op.addr.base_reg.name = "PC";
|
|
taken_op.addr.base_reg.size = kPCWidth;
|
|
taken_op.addr.displacement = disp;
|
|
taken_op.addr.kind = Operand::Address::kControlFlowTarget;
|
|
inst.operands.push_back(taken_op);
|
|
|
|
inst.branch_taken_pc =
|
|
static_cast<uint64_t>(static_cast<int64_t>(inst.pc) + disp);
|
|
|
|
DecodeFallThroughPC(inst);
|
|
}
|
|
|
|
static bool DecodeBranchRegLabel(const InstData &data, Instruction &inst,
|
|
RegClass reg_class) {
|
|
DecodeConditionalBranch(inst, data.imm19.simm19 << 2);
|
|
AddRegOperand(inst, kActionRead, reg_class, kUseAsValue, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// CBZ <Wt>, <label>
|
|
bool TryDecodeCBZ_32_COMPBRANCH(const InstData &data, Instruction &inst) {
|
|
return DecodeBranchRegLabel(data, inst, kRegW);
|
|
}
|
|
|
|
// CBZ <Xt>, <label>
|
|
bool TryDecodeCBZ_64_COMPBRANCH(const InstData &data, Instruction &inst) {
|
|
return DecodeBranchRegLabel(data, inst, kRegX);
|
|
}
|
|
|
|
// CBNZ <Wt>, <label>
|
|
bool TryDecodeCBNZ_32_COMPBRANCH(const InstData &data, Instruction &inst) {
|
|
return DecodeBranchRegLabel(data, inst, kRegW);
|
|
}
|
|
|
|
// CBNZ <Xt>, <label>
|
|
bool TryDecodeCBNZ_64_COMPBRANCH(const InstData &data, Instruction &inst) {
|
|
return DecodeBranchRegLabel(data, inst, kRegX);
|
|
}
|
|
|
|
bool DecodeTestBitBranch(const InstData &data, Instruction &inst) {
|
|
uint8_t bit_pos = (data.b5 << 5U) | data.b40;
|
|
AddImmOperand(inst, bit_pos);
|
|
DecodeConditionalBranch(inst, data.imm14.simm14 << 2);
|
|
RegClass reg_class;
|
|
if (data.b5 == 1) {
|
|
reg_class = kRegX;
|
|
inst.function += "_64";
|
|
} else {
|
|
reg_class = kRegW;
|
|
inst.function += "_32";
|
|
}
|
|
AddRegOperand(inst, kActionRead, reg_class, kUseAsValue, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// TBZ <R><t>, #<imm>, <label>
|
|
bool TryDecodeTBZ_ONLY_TESTBRANCH(const InstData &data, Instruction &inst) {
|
|
return DecodeTestBitBranch(data, inst);
|
|
}
|
|
|
|
// TBNZ <R><t>, #<imm>, <label>
|
|
bool TryDecodeTBNZ_ONLY_TESTBRANCH(const InstData &data, Instruction &inst) {
|
|
return DecodeTestBitBranch(data, inst);
|
|
}
|
|
|
|
// BL <label>
|
|
bool TryDecodeBL_ONLY_BRANCH_IMM(const InstData &data, Instruction &inst) {
|
|
inst.branch_taken_pc = static_cast<uint64_t>(static_cast<int64_t>(inst.pc) +
|
|
(data.imm26.simm26 << 2ULL));
|
|
inst.branch_not_taken_pc = inst.next_pc;
|
|
AddPCDisp(inst, data.imm26.simm26 << 2LL);
|
|
AddNextPC(inst); // Decodes the return address.
|
|
return true;
|
|
}
|
|
|
|
// BR <Xn>
|
|
bool TryDecodeBR_64_BRANCH_REG(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
static bool ShiftImmediate(uint64_t &value, uint8_t shift) {
|
|
switch (shift) {
|
|
case 0: // Shift 0 to left.
|
|
break;
|
|
case 1: // Shift left 12 bits.
|
|
value = value << 12;
|
|
break;
|
|
default:
|
|
LOG(ERROR) << "Decoding reserved bit for shift value.";
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// ADD <Wd|WSP>, <Wn|WSP>, #<imm>{, <shift>}
|
|
bool TryDecodeADD_32_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
auto imm = data.imm12.uimm;
|
|
if (!ShiftImmediate(imm, data.shift)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsAddress, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsAddress, data.Rn);
|
|
AddImmOperand(inst, imm);
|
|
return true;
|
|
}
|
|
|
|
// ADD <Xd|SP>, <Xn|SP>, #<imm>{, <shift>}
|
|
bool TryDecodeADD_64_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
auto imm = data.imm12.uimm;
|
|
if (!ShiftImmediate(imm, data.shift)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsAddress, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
AddImmOperand(inst, imm);
|
|
return true;
|
|
}
|
|
|
|
// ADD <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeADD_32_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
if (1 & (data.imm6.uimm >> 5)) {
|
|
return false; // `if sf == '0' && imm6<5> == '1' then ReservedValue();`.
|
|
}
|
|
auto shift_type = static_cast<Shift>(data.shift);
|
|
if (shift_type == kShiftROR) {
|
|
return false; // Shift type '11' is a reserved value.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddShiftRegOperand(inst, kRegW, kUseAsValue, data.Rm, shift_type,
|
|
data.imm6.uimm);
|
|
return true;
|
|
}
|
|
|
|
// ADD <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeADD_64_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
auto shift_type = static_cast<Shift>(data.shift);
|
|
if (shift_type == kShiftROR) {
|
|
return false; // Shift type '11' is a reserved value.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddShiftRegOperand(inst, kRegX, kUseAsValue, data.Rm, shift_type,
|
|
data.imm6.uimm);
|
|
return true;
|
|
}
|
|
|
|
// ADD <Wd|WSP>, <Wn|WSP>, <Wm>{, <extend> {#<amount>}}
|
|
bool TryDecodeADD_32_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto shift = data.imm3.uimm;
|
|
if (shift > 4) {
|
|
return false; // `if shift > 4 then ReservedValue();`.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsAddress, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsAddress, data.Rn);
|
|
AddExtendRegOperand(inst, kRegW, kUseAsValue, data.Rm, extend_type, 32,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// ADD <Xd|SP>, <Xn|SP>, <R><m>{, <extend> {#<amount>}}
|
|
bool TryDecodeADD_64_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto shift = data.imm3.uimm;
|
|
if (shift > 4) {
|
|
return false; // `if shift > 4 then ReservedValue();`.
|
|
}
|
|
auto reg_class = ExtendTypeToRegClass(extend_type);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsAddress, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
AddExtendRegOperand(inst, reg_class, kUseAsValue, data.Rm, extend_type, 64,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// SUB <Wd|WSP>, <Wn|WSP>, #<imm>{, <shift>}
|
|
bool TryDecodeSUB_32_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_32_ADDSUB_IMM(data, inst);
|
|
}
|
|
|
|
// SUB <Xd|SP>, <Xn|SP>, #<imm>{, <shift>}
|
|
bool TryDecodeSUB_64_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_64_ADDSUB_IMM(data, inst);
|
|
}
|
|
|
|
// SUB <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeSUB_32_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_32_ADDSUB_SHIFT(data, inst);
|
|
}
|
|
|
|
// SUB <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeSUB_64_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_64_ADDSUB_SHIFT(data, inst);
|
|
}
|
|
|
|
// SUB <Wd|WSP>, <Wn|WSP>, <Wm>{, <extend> {#<amount>}}
|
|
bool TryDecodeSUB_32_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_32_ADDSUB_EXT(data, inst);
|
|
}
|
|
|
|
// SUB <Xd|SP>, <Xn|SP>, <R><m>{, <extend> {#<amount>}}
|
|
bool TryDecodeSUB_64_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_64_ADDSUB_EXT(data, inst);
|
|
}
|
|
|
|
// SUBS <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeSUBS_32_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
auto shift_type = static_cast<Shift>(data.shift);
|
|
if (shift_type == kShiftROR) {
|
|
return false; // Shift type '11' is a reserved value.
|
|
} else if ((data.imm6.uimm >> 5) & 1) {
|
|
return false; // `if sf == '0' && imm6<5> == '1' then ReservedValue();`.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddShiftRegOperand(inst, kRegW, kUseAsValue, data.Rm, shift_type,
|
|
data.imm6.uimm);
|
|
return true;
|
|
}
|
|
|
|
// SUBS <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeSUBS_64_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
auto shift_type = static_cast<Shift>(data.shift);
|
|
if (shift_type == kShiftROR) {
|
|
return false; // Shift type '11' is a reserved value.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddShiftRegOperand(inst, kRegX, kUseAsValue, data.Rm, shift_type,
|
|
data.imm6.uimm);
|
|
return true;
|
|
}
|
|
|
|
// SUBS <Wd>, <Wn|WSP>, #<imm>{, <shift>}
|
|
bool TryDecodeSUBS_32S_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
auto imm = data.imm12.uimm;
|
|
if (!ShiftImmediate(imm, data.shift)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsAddress, data.Rn);
|
|
AddImmOperand(inst, imm);
|
|
return true;
|
|
}
|
|
|
|
// SUBS <Xd>, <Xn|SP>, #<imm>{, <shift>}
|
|
bool TryDecodeSUBS_64S_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
auto imm = data.imm12.uimm;
|
|
if (!ShiftImmediate(imm, data.shift)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
AddImmOperand(inst, imm);
|
|
return true;
|
|
}
|
|
|
|
// SUBS <Wd>, <Wn|WSP>, <Wm>{, <extend> {#<amount>}}
|
|
bool TryDecodeSUBS_32S_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto shift = data.imm3.uimm;
|
|
if (shift > 4) {
|
|
return false; // `if shift > 4 then ReservedValue();`.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsAddress, data.Rn);
|
|
AddExtendRegOperand(inst, kRegW, kUseAsValue, data.Rm, extend_type, 32,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// SUBS <Xd>, <Xn|SP>, <R><m>{, <extend> {#<amount>}}
|
|
bool TryDecodeSUBS_64S_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto shift = data.imm3.uimm;
|
|
if (shift > 4) {
|
|
return false; // `if shift > 4 then ReservedValue();`.
|
|
}
|
|
auto reg_class = ExtendTypeToRegClass(extend_type);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
AddExtendRegOperand(inst, reg_class, kUseAsValue, data.Rm, extend_type, 64,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// ADDS <Wd>, <Wn|WSP>, #<imm>{, <shift>}
|
|
bool TryDecodeADDS_32S_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSUBS_32S_ADDSUB_IMM(data, inst);
|
|
}
|
|
|
|
// ADDS <Xd>, <Xn|SP>, #<imm>{, <shift>}
|
|
bool TryDecodeADDS_64S_ADDSUB_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSUBS_64S_ADDSUB_IMM(data, inst);
|
|
}
|
|
|
|
// ADDS <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeADDS_32_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSUBS_32_ADDSUB_SHIFT(data, inst);
|
|
}
|
|
|
|
// ADDS <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeADDS_64_ADDSUB_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSUBS_64_ADDSUB_SHIFT(data, inst);
|
|
}
|
|
|
|
// ADDS <Wd>, <Wn|WSP>, <Wm>{, <extend> {#<amount>}}
|
|
bool TryDecodeADDS_32S_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSUBS_32S_ADDSUB_EXT(data, inst);
|
|
}
|
|
|
|
// ADDS <Xd>, <Xn|SP>, <R><m>{, <extend> {#<amount>}}
|
|
bool TryDecodeADDS_64S_ADDSUB_EXT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSUBS_64S_ADDSUB_EXT(data, inst);
|
|
}
|
|
|
|
static const char *kCondName[] = {"EQ", "CS", "MI", "VS",
|
|
"HI", "GE", "GT", "AL"};
|
|
|
|
static const char *kNegCondName[] = {"NE", "CC", "PL", "VC",
|
|
"LS", "LT", "LE", "AL"};
|
|
|
|
static const char *CondName(uint8_t cond) {
|
|
if (cond & 1) {
|
|
return kNegCondName[(cond >> 1) & 0x7];
|
|
} else {
|
|
return kCondName[(cond >> 1) & 0x7];
|
|
}
|
|
}
|
|
|
|
// `if option<1> == '0' then UnallocatedEncoding();`
|
|
static bool IsSubWordIndex(const InstData &data) {
|
|
return !(data.option & 0x2);
|
|
}
|
|
|
|
static void SetConditionalFunctionName(const InstData &data, Instruction &inst,
|
|
bool invert_condition = false) {
|
|
uint8_t cond = 0;
|
|
if (invert_condition) {
|
|
cond = data.cond ^ 1;
|
|
} else {
|
|
cond = data.cond;
|
|
}
|
|
|
|
std::stringstream ss;
|
|
ss << inst.function << "_" << CondName(cond);
|
|
inst.function = ss.str();
|
|
}
|
|
|
|
// B.<cond> <label>
|
|
bool TryDecodeB_ONLY_CONDBRANCH(const InstData &data, Instruction &inst) {
|
|
|
|
// Add in the condition to the isel name.
|
|
SetConditionalFunctionName(data, inst);
|
|
DecodeConditionalBranch(inst, data.imm19.simm19 << 2);
|
|
return true;
|
|
}
|
|
|
|
// STRB <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTRB_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 8, data.Rn, data.imm12.uimm);
|
|
return true;
|
|
}
|
|
|
|
// STRB <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeSTRB_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionWrite, 8, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// STRB <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeSTRB_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionWrite, 8, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// STRB <Wt>, [<Xn|SP>, (<Wm>|<Xm>), <extend> {<amount>}]
|
|
bool TryDecodeSTRB_32B_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
if (IsSubWordIndex(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsAddress, data.Rn);
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto rclass = ExtendTypeToRegClass(extend_type);
|
|
AddExtendRegOperand(inst, rclass, kUseAsValue, data.Rm, extend_type, 64, 0);
|
|
return true;
|
|
}
|
|
|
|
// STRB <Wt>, [<Xn|SP>, <Xm>{, LSL <amount>}]
|
|
bool TryDecodeSTRB_32BL_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
if (IsSubWordIndex(data)) { // Sub-word index.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`
|
|
}
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsAddress, data.Rn);
|
|
AddShiftRegOperand(inst, kRegX, kUseAsValue, data.Rm, kShiftLSL, 0);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeLDRn_m_LDST_REGOFF(const InstData &data, Instruction &inst,
|
|
RegClass dest_rclass, uint64_t scale) {
|
|
if (IsSubWordIndex(data)) { // Sub-word index.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`
|
|
}
|
|
AddRegOperand(inst, kActionWrite, dest_rclass, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto rclass = ExtendTypeToRegClass(extend_type);
|
|
AddExtendRegOperand(inst, rclass, kUseAsValue, data.Rm, extend_type, 64,
|
|
data.S * scale);
|
|
return true;
|
|
}
|
|
|
|
// LDRB <Wt>, [<Xn|SP>, (<Wm>|<Xm>), <extend> {<amount>}]
|
|
bool TryDecodeLDRB_32B_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegW, 0);
|
|
}
|
|
|
|
// LDRB <Wt>, [<Xn|SP>, <Xm>{, LSL <amount>}]
|
|
bool TryDecodeLDRB_32BL_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
if (IsSubWordIndex(data)) { // Sub-word index.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsAddress, data.Rn);
|
|
AddShiftRegOperand(inst, kRegX, kUseAsValue, data.Rm, kShiftLSL, 0);
|
|
return true;
|
|
}
|
|
|
|
// LDRH <Wt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDRH_32_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegW, 1);
|
|
}
|
|
|
|
// STRH <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTRH_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 16, data.Rn, data.imm12.uimm << 1);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeSTRn_m_LDST_REGOFF(const InstData &data, Instruction &inst,
|
|
RegClass dest_rclass) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4 || IsSubWordIndex(data)) { // Sub-word index.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`
|
|
}
|
|
auto shift = (data.S == 1) ? scale : 0U;
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto rclass = ExtendTypeToRegClass(extend_type);
|
|
AddRegOperand(inst, kActionRead, dest_rclass, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsAddress, data.Rn);
|
|
AddExtendRegOperand(inst, rclass, kUseAsValue, data.Rm, extend_type, 64,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// STRH <Wt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeSTRH_32_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTRn_m_LDST_REGOFF(data, inst, kRegW);
|
|
}
|
|
|
|
// STRH <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeSTRH_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionWrite, 16, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// STRH <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeSTRH_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionWrite, 16, data.Rn, offset, data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// NOP
|
|
bool TryDecodeNOP_HI_SYSTEM(const InstData &, Instruction &) {
|
|
return true;
|
|
}
|
|
|
|
// ORN <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeORN_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// ORN <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeORN_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// EON <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeEON_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// EON <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeEON_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// EOR <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeEOR_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
if (1 & (data.imm6.uimm >> 5)) {
|
|
return false; // `if sf == '0' && imm6<5> == '1' then ReservedValue();`.
|
|
}
|
|
TryDecodeRdW_Rn(data, inst, kRegW);
|
|
AddShiftRegOperand(inst, kRegW, kUseAsValue, data.Rm,
|
|
static_cast<Shift>(data.shift), data.imm6.uimm);
|
|
return true;
|
|
}
|
|
|
|
// EOR <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeEOR_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
TryDecodeRdW_Rn(data, inst, kRegX);
|
|
AddShiftRegOperand(inst, kRegX, kUseAsValue, data.Rm,
|
|
static_cast<Shift>(data.shift), data.imm6.uimm);
|
|
return true;
|
|
}
|
|
|
|
// EOR <Wd|WSP>, <Wn>, #<imm>
|
|
bool TryDecodeEOR_32_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
uint64_t wmask = 0;
|
|
if (data.N) {
|
|
return false; // `if sf == '0' && N != '0' then ReservedValue();`.
|
|
}
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, true, 32,
|
|
&wmask)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsAddress, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, wmask, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// EOR <Xd|SP>, <Xn>, #<imm>
|
|
bool TryDecodeEOR_64_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
uint64_t wmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, true, 64,
|
|
&wmask)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsAddress, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, wmask, kUnsigned, 64);
|
|
return true;
|
|
}
|
|
|
|
// AND <Wd|WSP>, <Wn>, #<imm>
|
|
bool TryDecodeAND_32_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_IMM(data, inst);
|
|
}
|
|
|
|
// AND <Xd|SP>, <Xn>, #<imm>
|
|
bool TryDecodeAND_64_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_IMM(data, inst);
|
|
}
|
|
|
|
// AND <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeAND_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// AND <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeAND_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// ORR <Wd|WSP>, <Wn>, #<imm>
|
|
bool TryDecodeORR_32_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_IMM(data, inst);
|
|
}
|
|
|
|
// ORR <Xd|SP>, <Xn>, #<imm>
|
|
bool TryDecodeORR_64_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_IMM(data, inst);
|
|
}
|
|
|
|
// ORR <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeORR_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// ORR <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeORR_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// BIC <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeBIC_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// BIC <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeBIC_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeEOR_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
static bool TryDecodeLDUR_Vn_LDST_UNSCALED(const InstData &data,
|
|
Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionWrite, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, num_bits, data.Rn,
|
|
static_cast<uint64_t>(data.imm12.uimm));
|
|
return true;
|
|
}
|
|
|
|
// LDUR <Bt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_B_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_Vn_LDST_UNSCALED(data, inst, kRegB);
|
|
}
|
|
|
|
// LDUR <Ht>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_H_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_Vn_LDST_UNSCALED(data, inst, kRegH);
|
|
}
|
|
|
|
// LDUR <St>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_S_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_Vn_LDST_UNSCALED(data, inst, kRegS);
|
|
}
|
|
|
|
// LDUR <Dt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_D_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_Vn_LDST_UNSCALED(data, inst, kRegD);
|
|
}
|
|
|
|
// LDUR <Qt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_Q_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_Vn_LDST_UNSCALED(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDUR_n_LDST_UNSCALED(const InstData &data,
|
|
Instruction &inst, RegClass rclass,
|
|
uint64_t mem_size) {
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, mem_size, data.Rn,
|
|
static_cast<uint64_t>(data.imm9.simm9));
|
|
return true;
|
|
}
|
|
|
|
// LDURB <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDURB_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegW, 8);
|
|
}
|
|
|
|
// LDURSB <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDURSB_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegW, 8);
|
|
}
|
|
|
|
// LDURH <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDURH_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegW, 16);
|
|
}
|
|
|
|
// LDURSH <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDURSH_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegW, 16);
|
|
}
|
|
|
|
// LDUR <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegW, 32);
|
|
}
|
|
|
|
// LDUR <Xt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDUR_64_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegX, 64);
|
|
}
|
|
|
|
// LDURSW <Xt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeLDURSW_64_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDUR_n_LDST_UNSCALED(data, inst, kRegX, 64);
|
|
}
|
|
|
|
static bool TryDecodeSTUR_Vn_LDST_UNSCALED(const InstData &data,
|
|
Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionRead, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, num_bits, data.Rn,
|
|
static_cast<uint64_t>(data.imm12.uimm));
|
|
return true;
|
|
}
|
|
|
|
// STUR <Bt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_B_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_Vn_LDST_UNSCALED(data, inst, kRegB);
|
|
}
|
|
|
|
// STUR <Ht>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_H_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_Vn_LDST_UNSCALED(data, inst, kRegH);
|
|
}
|
|
|
|
// STUR <St>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_S_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_Vn_LDST_UNSCALED(data, inst, kRegS);
|
|
}
|
|
|
|
// STUR <Dt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_D_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_Vn_LDST_UNSCALED(data, inst, kRegD);
|
|
}
|
|
|
|
// STUR <Qt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_Q_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_Vn_LDST_UNSCALED(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeSTUR_n_LDST_UNSCALED(const InstData &data,
|
|
Instruction &inst, RegClass rclass,
|
|
uint64_t mem_size) {
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, mem_size, data.Rn,
|
|
static_cast<uint64_t>(data.imm9.simm9));
|
|
return true;
|
|
}
|
|
|
|
// STURB <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTURB_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_n_LDST_UNSCALED(data, inst, kRegW, 8);
|
|
}
|
|
|
|
// STURH <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTURH_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_n_LDST_UNSCALED(data, inst, kRegW, 16);
|
|
}
|
|
|
|
// STUR <Wt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_32_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_n_LDST_UNSCALED(data, inst, kRegW, 32);
|
|
}
|
|
|
|
// STUR <Xt>, [<Xn|SP>{, #<simm>}]
|
|
bool TryDecodeSTUR_64_LDST_UNSCALED(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTUR_n_LDST_UNSCALED(data, inst, kRegX, 64);
|
|
}
|
|
|
|
static bool TryDecodeLDRSn_m_LDST_IMMPOST(const InstData &data,
|
|
Instruction &inst, RegClass rclass,
|
|
uint64_t mem_size) {
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddPostIndexMemOp(inst, kActionRead, mem_size, data.Rn,
|
|
static_cast<uint64_t>(data.imm9.simm9), data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// LDRB <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRB_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSB_32_LDST_IMMPOST(data, inst);
|
|
}
|
|
|
|
// LDRSB <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRSB_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPOST(data, inst, kRegW, 8);
|
|
}
|
|
|
|
// LDRSB <Xt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRSB_64_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPOST(data, inst, kRegX, 8);
|
|
}
|
|
|
|
// LDRH <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRH_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSH_32_LDST_IMMPOST(data, inst);
|
|
}
|
|
|
|
// LDRSH <Wt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRSH_32_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPOST(data, inst, kRegW, 16);
|
|
}
|
|
|
|
// LDRSH <Xt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRSH_64_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPOST(data, inst, kRegX, 16);
|
|
}
|
|
|
|
// LDRSW <Xt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDRSW_64_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPOST(data, inst, kRegX, 32);
|
|
}
|
|
|
|
static bool TryDecodeLDRSn_m_LDST_IMMPRE(const InstData &data,
|
|
Instruction &inst, RegClass rclass,
|
|
uint64_t mem_size) {
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddPreIndexMemOp(inst, kActionRead, mem_size, data.Rn,
|
|
static_cast<uint64_t>(data.imm9.simm9), data.Rt);
|
|
return true;
|
|
}
|
|
|
|
// LDRB <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRB_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSB_32_LDST_IMMPRE(data, inst);
|
|
}
|
|
|
|
// LDRSB <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRSB_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPRE(data, inst, kRegW, 8);
|
|
}
|
|
|
|
// LDRSB <Xt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRSB_64_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPRE(data, inst, kRegX, 8);
|
|
}
|
|
|
|
// LDRH <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRH_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSH_32_LDST_IMMPRE(data, inst);
|
|
}
|
|
|
|
// LDRSH <Wt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRSH_32_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPRE(data, inst, kRegW, 16);
|
|
}
|
|
|
|
// LDRSH <Xt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRSH_64_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPRE(data, inst, kRegX, 16);
|
|
}
|
|
|
|
// LDRSW <Xt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDRSW_64_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_IMMPRE(data, inst, kRegX, 32);
|
|
}
|
|
|
|
static bool TryDecodeLDRSn_m_LDST_POS(const InstData &data, Instruction &inst,
|
|
RegClass rclass, uint64_t mem_size,
|
|
uint64_t scale) {
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, mem_size, data.Rn,
|
|
data.imm12.uimm << scale);
|
|
return true;
|
|
}
|
|
|
|
// LDRB <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRB_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSB_32_LDST_POS(data, inst);
|
|
}
|
|
|
|
// LDRSB <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRSB_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_POS(data, inst, kRegW, 8, 0);
|
|
}
|
|
|
|
// LDRSB <Xt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRSB_64_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_POS(data, inst, kRegX, 8, 0);
|
|
}
|
|
|
|
// LDRH <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRH_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSH_32_LDST_POS(data, inst);
|
|
}
|
|
|
|
// LDRSH <Wt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRSH_32_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_POS(data, inst, kRegW, 16, 1);
|
|
}
|
|
|
|
// LDRSH <Xt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRSH_64_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_POS(data, inst, kRegX, 16, 1);
|
|
}
|
|
|
|
// LDRSW <Xt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDRSW_64_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRSn_m_LDST_POS(data, inst, kRegX, 32, 2);
|
|
}
|
|
|
|
// LDRSB <Wt>, [<Xn|SP>, (<Wm>|<Xm>), <extend> {<amount>}]
|
|
bool TryDecodeLDRSB_32B_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegW, 0);
|
|
}
|
|
|
|
// LDRSB <Wt>, [<Xn|SP>, <Xm>{, LSL <amount>}]
|
|
bool TryDecodeLDRSB_32BL_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRB_32BL_LDST_REGOFF(data, inst);
|
|
}
|
|
|
|
// LDRSB <Xt>, [<Xn|SP>, (<Wm>|<Xm>), <extend> {<amount>}]
|
|
bool TryDecodeLDRSB_64B_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegX, 0);
|
|
}
|
|
|
|
// LDRSB <Xt>, [<Xn|SP>, <Xm>{, LSL <amount>}]
|
|
bool TryDecodeLDRSB_64BL_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
|
|
// NOTE(pag): This decoder specifies `Wt` as the dest reg, but it will be
|
|
// converted into `Xt` because writes to `W` regs affect the whole
|
|
// `X` reg.
|
|
return TryDecodeLDRB_32BL_LDST_REGOFF(data, inst);
|
|
}
|
|
|
|
// LDRSH <Wt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDRSH_32_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegW, 1);
|
|
}
|
|
|
|
// LDRSH <Xt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDRSH_64_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegX, 1);
|
|
}
|
|
|
|
// LDRSW <Xt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDRSW_64_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDRn_m_LDST_REGOFF(data, inst, kRegX, 2);
|
|
}
|
|
|
|
// LDRSW <Xt>, <label>
|
|
bool TryDecodeLDRSW_64_LOADLIT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_64_LOADLIT(data, inst);
|
|
}
|
|
|
|
// HINT #<imm>
|
|
bool TryDecodeHINT_1(const InstData &data, Instruction &inst) {
|
|
return true; // NOP.
|
|
}
|
|
|
|
// HINT #<imm>
|
|
bool TryDecodeHINT_2(const InstData &data, Instruction &inst) {
|
|
return true; // NOP.
|
|
}
|
|
|
|
// HINT #<imm>
|
|
bool TryDecodeHINT_3(const InstData &data, Instruction &inst) {
|
|
return true; // NOP.
|
|
}
|
|
|
|
// UMADDL <Xd>, <Wn>, <Wm>, <Xa>
|
|
bool TryDecodeUMADDL_64WA_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rm);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Ra);
|
|
return true;
|
|
}
|
|
|
|
// UMULH <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeUMULH_64_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegX);
|
|
}
|
|
|
|
// SMADDL <Xd>, <Wn>, <Wm>, <Xa>
|
|
bool TryDecodeSMADDL_64WA_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMADDL_64WA_DP_3SRC(data, inst);
|
|
}
|
|
|
|
// SMULH <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeSMULH_64_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMULH_64_DP_3SRC(data, inst);
|
|
}
|
|
|
|
// UDIV <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeUDIV_32_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegW);
|
|
}
|
|
|
|
// UDIV <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeUDIV_64_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegX);
|
|
}
|
|
|
|
// UBFM <Wd>, <Wn>, #<immr>, #<imms>
|
|
bool TryDecodeUBFM_32M_BITFIELD(const InstData &data, Instruction &inst) {
|
|
|
|
// if sf == '0' && (N != '0' || immr<5> != '0' || imms<5> != '0')
|
|
// then ReservedValue();
|
|
if (data.N || (data.immr.uimm & 0x20) || (data.imms.uimm & 0x20)) {
|
|
return false;
|
|
}
|
|
|
|
uint64_t wmask = 0;
|
|
uint64_t tmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, false, 32, &wmask,
|
|
&tmask)) {
|
|
return false;
|
|
}
|
|
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddShiftRegOperand(inst, kRegW, kUseAsValue, data.Rn, kShiftROR,
|
|
data.immr.uimm);
|
|
AddImmOperand(inst, wmask & tmask, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// UBFM <Xd>, <Xn>, #<immr>, #<imms>
|
|
bool TryDecodeUBFM_64M_BITFIELD(const InstData &data, Instruction &inst) {
|
|
if (!data.N) {
|
|
return false; // `if sf == '1' && N != '1' then ReservedValue();`.
|
|
}
|
|
|
|
uint64_t wmask = 0;
|
|
uint64_t tmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, false, 64, &wmask,
|
|
&tmask)) {
|
|
return false;
|
|
}
|
|
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddShiftRegOperand(inst, kRegX, kUseAsValue, data.Rn, kShiftROR,
|
|
data.immr.uimm);
|
|
AddImmOperand(inst, wmask & tmask, kUnsigned, 64);
|
|
return true;
|
|
}
|
|
|
|
// SBFM <Wd>, <Wn>, #<immr>, #<imms>
|
|
bool TryDecodeSBFM_32M_BITFIELD(const InstData &data, Instruction &inst) {
|
|
|
|
// if sf == '0' && (N != '0' || immr<5> != '0' || imms<5> != '0')
|
|
// then ReservedValue();
|
|
if (data.N || (data.immr.uimm & 0x20) || (data.imms.uimm & 0x20)) {
|
|
return false;
|
|
}
|
|
uint64_t wmask = 0;
|
|
uint64_t tmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, false, 32, &wmask,
|
|
&tmask)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.immr.uimm, kUnsigned, 32);
|
|
AddImmOperand(inst, data.imms.uimm, kUnsigned, 32);
|
|
AddImmOperand(inst, wmask, kUnsigned, 32);
|
|
AddImmOperand(inst, tmask, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// SBFM <Xd>, <Xn>, #<immr>, #<imms>
|
|
bool TryDecodeSBFM_64M_BITFIELD(const InstData &data, Instruction &inst) {
|
|
if (!data.N) {
|
|
return false; // `if sf == '1' && N != '1' then ReservedValue();`.
|
|
}
|
|
uint64_t wmask = 0;
|
|
uint64_t tmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, false, 64, &wmask,
|
|
&tmask)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.immr.uimm, kUnsigned, 64);
|
|
AddImmOperand(inst, data.imms.uimm, kUnsigned, 64);
|
|
AddImmOperand(inst, wmask, kUnsigned, 64);
|
|
AddImmOperand(inst, tmask, kUnsigned, 64);
|
|
return true;
|
|
}
|
|
|
|
// BFM <Wd>, <Wn>, #<immr>, #<imms>
|
|
bool TryDecodeBFM_32M_BITFIELD(const InstData &data, Instruction &inst) {
|
|
|
|
// if sf == '0' && (N != '0' || immr<5> != '0' || imms<5> != '0')
|
|
// then ReservedValue();
|
|
if (data.N || (data.immr.uimm & 0x20) || (data.imms.uimm & 0x20)) {
|
|
return false;
|
|
}
|
|
uint64_t wmask = 0;
|
|
uint64_t tmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, false, 32, &wmask,
|
|
&tmask)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.immr.uimm, kUnsigned, 32);
|
|
AddImmOperand(inst, wmask, kUnsigned, 32);
|
|
AddImmOperand(inst, tmask, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// BFM <Xd>, <Xn>, #<immr>, #<imms>
|
|
bool TryDecodeBFM_64M_BITFIELD(const InstData &data, Instruction &inst) {
|
|
if (!data.N) {
|
|
return false; // `if sf == '1' && N != '1' then ReservedValue();`.
|
|
}
|
|
uint64_t wmask = 0;
|
|
uint64_t tmask = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, false, 64, &wmask,
|
|
&tmask)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.immr.uimm, kUnsigned, 64);
|
|
AddImmOperand(inst, wmask, kUnsigned, 64);
|
|
AddImmOperand(inst, tmask, kUnsigned, 64);
|
|
return true;
|
|
}
|
|
|
|
// ANDS <Wd>, <Wn>, #<imm>
|
|
bool TryDecodeANDS_32S_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
if (data.N) {
|
|
return false; // `if sf == '0' && N != '0' then ReservedValue();`.
|
|
}
|
|
uint64_t imm = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, true, 32, &imm)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, imm, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// ANDS <Xd>, <Xn>, #<imm>
|
|
bool TryDecodeANDS_64S_LOG_IMM(const InstData &data, Instruction &inst) {
|
|
uint64_t imm = 0;
|
|
if (!DecodeBitMasks(data.N, data.imms.uimm, data.immr.uimm, true, 64, &imm)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, imm, kUnsigned, 64);
|
|
return true;
|
|
}
|
|
|
|
// ANDS <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeANDS_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeAND_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// ANDS <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeANDS_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeAND_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// MADD <Wd>, <Wn>, <Wm>, <Wa>
|
|
bool TryDecodeMADD_32A_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
TryDecodeRdW_Rn_Rm(data, inst, kRegW);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Ra);
|
|
return true;
|
|
}
|
|
|
|
// MADD <Xd>, <Xn>, <Xm>, <Xa>
|
|
bool TryDecodeMADD_64A_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
TryDecodeRdW_Rn_Rm(data, inst, kRegX);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Ra);
|
|
return true;
|
|
}
|
|
|
|
// MSUB <Wd>, <Wn>, <Wm>, <Wa>
|
|
bool TryDecodeMSUB_32A_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeMADD_32A_DP_3SRC(data, inst);
|
|
}
|
|
|
|
// MSUB <Xd>, <Xn>, <Xm>, <Xa>
|
|
bool TryDecodeMSUB_64A_DP_3SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeMADD_64A_DP_3SRC(data, inst);
|
|
}
|
|
|
|
// EXTR <Wd>, <Wn>, <Wm>, #<lsb>
|
|
bool TryDecodeEXTR_32_EXTRACT(const InstData &data, Instruction &inst) {
|
|
if (data.N != data.sf) {
|
|
return false; // `if N != sf then UnallocatedEncoding();`
|
|
}
|
|
if (data.imms.uimm & 0x20) {
|
|
return false; // `if sf == '0' && imms<5> == '1' then ReservedValue();`
|
|
}
|
|
TryDecodeRdW_Rn_Rm(data, inst, kRegW);
|
|
AddImmOperand(inst, data.imms.uimm, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// EXTR <Xd>, <Xn>, <Xm>, #<lsb>
|
|
bool TryDecodeEXTR_64_EXTRACT(const InstData &data, Instruction &inst) {
|
|
if (data.N != data.sf) {
|
|
return false; // `if N != sf then UnallocatedEncoding();`
|
|
}
|
|
TryDecodeRdW_Rn_Rm(data, inst, kRegX);
|
|
AddImmOperand(inst, data.imms.uimm, kUnsigned, 64);
|
|
return true;
|
|
}
|
|
|
|
// LSLV <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeLSLV_32_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegW);
|
|
}
|
|
|
|
// LSLV <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeLSLV_64_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegX);
|
|
}
|
|
|
|
// LSRV <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeLSRV_32_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_32_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// LSRV <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeLSRV_64_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_64_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// ASRV <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeASRV_32_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_32_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// ASRV <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeASRV_64_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_64_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// RORV <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeRORV_32_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_32_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// RORV <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeRORV_64_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_64_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// SBC <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeSBC_32_ADDSUB_CARRY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_32_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// SBC <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeSBC_64_ADDSUB_CARRY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLSLV_64_DP_2SRC(data, inst);
|
|
}
|
|
|
|
// SBCS <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeSBCS_32_ADDSUB_CARRY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSBC_32_ADDSUB_CARRY(data, inst);
|
|
}
|
|
|
|
// SBCS <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeSBCS_64_ADDSUB_CARRY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSBC_64_ADDSUB_CARRY(data, inst);
|
|
}
|
|
|
|
// UCVTF <Hd>, <Wn>
|
|
bool TryDecodeUCVTF_H32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegH, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// UCVTF <Sd>, <Wn>
|
|
bool TryDecodeUCVTF_S32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// UCVTF <Dd>, <Wn>
|
|
bool TryDecodeUCVTF_D32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// UCVTF <Hd>, <Xn>
|
|
bool TryDecodeUCVTF_H64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegH, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// UCVTF <Sd>, <Xn>
|
|
bool TryDecodeUCVTF_S64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// UCVTF <Dd>, <Xn>
|
|
bool TryDecodeUCVTF_D64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
bool IsUnallocatedFloatEncoding(const InstData &data) {
|
|
|
|
// when type `10` UnallocatedEncoding()
|
|
// if opcode<2:1>:rmode != '11 01`
|
|
if (data.type == 2) {
|
|
uint8_t v_sig = ((data.opcode >> 1U) << 2) | data.rmode;
|
|
return (v_sig != 0xD);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// FCVT <Dd>, <Sn>
|
|
bool TryDecodeFCVT_DS_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data) || data.opc == 2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVT <Hd>, <Dn>
|
|
bool TryDecodeFCVT_HD_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
return false;
|
|
}
|
|
|
|
// FCVT <Sd>, <Dn>
|
|
bool TryDecodeFCVT_SD_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data) || data.opc == 2) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZS <Wd>, <Sn>
|
|
bool TryDecodeFCVTZS_32S_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZS <Xd>, <Sn>
|
|
bool TryDecodeFCVTZS_64S_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZS <Wd>, <Dn>
|
|
bool TryDecodeFCVTZS_32D_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZS <Xd>, <Dn>
|
|
bool TryDecodeFCVTZS_64D_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZU <Wd>, <Sn>
|
|
bool TryDecodeFCVTZU_32S_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZU <Wd>, <Dn>
|
|
bool TryDecodeFCVTZU_32D_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZU <Xd>, <Sn>
|
|
bool TryDecodeFCVTZU_64S_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCVTZU <Xd>, <Dn>
|
|
bool TryDecodeFCVTZU_64D_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Hd>, #<imm>
|
|
bool TryDecodeFMOV_H_FLOATIMM(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegH, kUseAsValue, data.Rd);
|
|
auto float_val = VFPExpandImmToFloat32(data.imm8.uimm);
|
|
AddImmOperand(inst, float_val);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Sd>, #<imm>
|
|
bool TryDecodeFMOV_S_FLOATIMM(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
auto float_val = VFPExpandImmToFloat32(data.imm8.uimm);
|
|
AddImmOperand(inst, float_val);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Dd>, #<imm>
|
|
bool TryDecodeFMOV_D_FLOATIMM(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
auto float_val = VFPExpandImmToFloat64(data.imm8.uimm);
|
|
AddImmOperand(inst, float_val);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Sd>, <Wn>
|
|
bool TryDecodeFMOV_S32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Wd>, <Sn>
|
|
bool TryDecodeFMOV_32S_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Dd>, <Xn>
|
|
bool TryDecodeFMOV_D64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
// FMOV <Xd>, <Dn>
|
|
bool TryDecodeFMOV_64D_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Sd>, <Sn>
|
|
bool TryDecodeFMOV_S_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Dd>, <Dn>
|
|
bool TryDecodeFMOV_D_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Vd>.D[1], <Xn>
|
|
bool TryDecodeFMOV_V64I_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMOV <Xd>, <Vn>.D[1]
|
|
bool TryDecodeFMOV_64VX_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeFn_Fm(const InstData &data, Instruction &inst,
|
|
RegClass rclass) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rm);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeFdW_Fn_Fm(const InstData &data, Instruction &inst,
|
|
RegClass rclass) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rd);
|
|
return TryDecodeFn_Fm(data, inst, rclass);
|
|
}
|
|
|
|
// FADD <Hd>, <Hn>, <Hm>
|
|
bool TryDecodeFADD_H_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegH);
|
|
}
|
|
|
|
// FADD <Sd>, <Sn>, <Sm>
|
|
bool TryDecodeFADD_S_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegS);
|
|
}
|
|
|
|
// FADD <Dd>, <Dn>, <Dm>
|
|
bool TryDecodeFADD_D_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegD);
|
|
}
|
|
|
|
// FMUL <Hd>, <Hn>, <Hm>
|
|
bool TryDecodeFMUL_H_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegH);
|
|
}
|
|
|
|
// FMUL <Sd>, <Sn>, <Sm>
|
|
bool TryDecodeFMUL_S_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegS);
|
|
}
|
|
|
|
// FMUL <Dd>, <Dn>, <Dm>
|
|
bool TryDecodeFMUL_D_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegD);
|
|
}
|
|
|
|
// FDIV <Hd>, <Hn>, <Hm>
|
|
bool TryDecodeFDIV_H_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegH);
|
|
}
|
|
|
|
// FDIV <Sd>, <Sn>, <Sm>
|
|
bool TryDecodeFDIV_S_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegS);
|
|
}
|
|
|
|
// FDIV <Dd>, <Dn>, <Dm>
|
|
bool TryDecodeFDIV_D_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegD);
|
|
}
|
|
|
|
// FSUB <Hd>, <Hn>, <Hm>
|
|
bool TryDecodeFSUB_H_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegH);
|
|
}
|
|
|
|
// FSUB <Sd>, <Sn>, <Sm>
|
|
bool TryDecodeFSUB_S_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegS);
|
|
}
|
|
|
|
// FSUB <Dd>, <Dn>, <Dm>
|
|
bool TryDecodeFSUB_D_FLOATDP2(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFdW_Fn_Fm(data, inst, kRegD);
|
|
}
|
|
|
|
// FMADD <Sd>, <Sn>, <Sm>, <Sa>
|
|
bool TryDecodeFMADD_S_FLOATDP3(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rm);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Ra);
|
|
return true;
|
|
}
|
|
|
|
// FMADD <Dd>, <Dn>, <Dm>, <Da>
|
|
bool TryDecodeFMADD_D_FLOATDP3(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rm);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Ra);
|
|
return true;
|
|
}
|
|
|
|
// FCMPE <Sn>, <Sm>
|
|
bool TryDecodeFCMPE_S_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFn_Fm(data, inst, kRegS);
|
|
}
|
|
|
|
// FCMPE <Hn>, <Hm>
|
|
bool TryDecodeFCMPE_H_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFn_Fm(data, inst, kRegH);
|
|
}
|
|
|
|
// FCMPE <Dn>, <Dm>
|
|
bool TryDecodeFCMPE_D_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFn_Fm(data, inst, kRegD);
|
|
}
|
|
|
|
static bool TryDecodeFCMP_ToZero(const InstData &data, Instruction &inst,
|
|
RegClass rclass) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionRead, rclass, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FCMPE <Hn>, #0.0
|
|
bool TryDecodeFCMPE_HZ_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFCMP_ToZero(data, inst, kRegH);
|
|
}
|
|
|
|
// FCMPE <Sn>, #0.0
|
|
bool TryDecodeFCMPE_SZ_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFCMP_ToZero(data, inst, kRegS);
|
|
}
|
|
|
|
// FCMPE <Dn>, #0.0
|
|
bool TryDecodeFCMPE_DZ_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFCMP_ToZero(data, inst, kRegD);
|
|
}
|
|
|
|
// FCMP <Dn>, #0.0
|
|
bool TryDecodeFCMP_DZ_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFCMP_ToZero(data, inst, kRegD);
|
|
}
|
|
|
|
// FCMP <Sn>, #0.0
|
|
bool TryDecodeFCMP_SZ_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFCMP_ToZero(data, inst, kRegS);
|
|
}
|
|
|
|
// FCMP <Dn>, <Dm>
|
|
bool TryDecodeFCMP_D_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFn_Fm(data, inst, kRegD);
|
|
}
|
|
|
|
// FCMP <Sn>, <Sm>
|
|
bool TryDecodeFCMP_S_FLOATCMP(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFn_Fm(data, inst, kRegS);
|
|
}
|
|
|
|
// FABS <Sd>, <Sn>
|
|
bool TryDecodeFABS_S_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FABS <Dd>, <Dn>
|
|
bool TryDecodeFABS_D_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FNEG <Sd>, <Sn>
|
|
bool TryDecodeFNEG_S_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegS, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FNEG <Dd>, <Dn>
|
|
bool TryDecodeFNEG_D_FLOATDP1(const InstData &data, Instruction &inst) {
|
|
if (IsUnallocatedFloatEncoding(data)) {
|
|
return false;
|
|
}
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegD, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// SVC #<imm>
|
|
bool TryDecodeSVC_EX_EXCEPTION(const InstData &data, Instruction &inst) {
|
|
AddImmOperand(inst, data.imm16.uimm, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// BRK #<imm>
|
|
bool TryDecodeBRK_EX_EXCEPTION(const InstData &data, Instruction &inst) {
|
|
AddImmOperand(inst, data.imm16.uimm, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
union SystemReg {
|
|
uint64_t flat;
|
|
enum Name : uint64_t {
|
|
kFPCR = 0xDA20,
|
|
kFPSR = 0xDA21,
|
|
kTPIDR_EL0 = 0xDE82,
|
|
kTPIDRRO_EL0 = 0xDE83,
|
|
} name;
|
|
struct {
|
|
uint64_t op2 : 3;
|
|
uint64_t crm : 4;
|
|
uint64_t crn : 4;
|
|
uint64_t op1 : 3;
|
|
uint64_t op0 : 2;
|
|
|
|
uint64_t _rest : 64 - 16;
|
|
} __attribute__((packed));
|
|
} __attribute__((packed));
|
|
|
|
static_assert(sizeof(SystemReg) == sizeof(uint64_t),
|
|
"Invalid packing of `union SystemReg`.");
|
|
|
|
static bool AppendSysRegName(Instruction &inst, SystemReg bits) {
|
|
std::stringstream ss;
|
|
ss << inst.function << "_";
|
|
|
|
switch (bits.name) {
|
|
case SystemReg::kFPCR: ss << "FPCR"; break;
|
|
case SystemReg::kFPSR: ss << "FPSR"; break;
|
|
case SystemReg::kTPIDR_EL0: ss << "TPIDR_EL0"; break;
|
|
case SystemReg::kTPIDRRO_EL0: ss << "TPIDRRO_EL0"; break;
|
|
default:
|
|
LOG(ERROR) << "Unrecognized system register " << std::hex << bits.flat
|
|
<< " with op0=" << bits.op0 << ", op1=" << bits.op1
|
|
<< ", crn=" << bits.crn << ", crm=" << bits.crm
|
|
<< ", op2=" << bits.op2 << std::dec;
|
|
return false;
|
|
}
|
|
|
|
inst.function = ss.str();
|
|
return true;
|
|
}
|
|
|
|
// MRS <Xt>, (<systemreg>|S<op0>_<op1>_<Cn>_<Cm>_<op2>)
|
|
bool TryDecodeMRS_RS_SYSTEM(const InstData &data, Instruction &inst) {
|
|
SystemReg bits;
|
|
bits.op0 = data.o0 + 2ULL; // 2 bits.
|
|
bits.op1 = data.op1; // 3 bits.
|
|
bits.crn = data.CRn; // 4 bits.
|
|
bits.crm = data.CRm; // 4 bits.
|
|
bits.op2 = data.op2; // 3 bits.
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
return AppendSysRegName(inst, bits);
|
|
}
|
|
|
|
// MSR (<systemreg>|S<op0>_<op1>_<Cn>_<Cm>_<op2>), <Xt>
|
|
bool TryDecodeMSR_SR_SYSTEM(const InstData &data, Instruction &inst) {
|
|
SystemReg bits;
|
|
bits.op0 = data.o0 + 2ULL; // 2 bits.
|
|
bits.op1 = data.op1; // 3 bits.
|
|
bits.crn = data.CRn; // 4 bits.
|
|
bits.crm = data.CRm; // 4 bits.
|
|
bits.op2 = data.op2; // 3 bits.
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
return AppendSysRegName(inst, bits);
|
|
}
|
|
|
|
static bool TryDecodeSTR_Vn_LDST_POS(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionRead, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, num_bits, data.Rn,
|
|
static_cast<uint64_t>(data.imm12.uimm) << scale);
|
|
return true;
|
|
}
|
|
// STR <Bt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_B_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_POS(data, inst, kRegB);
|
|
}
|
|
|
|
// STR <Ht>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_H_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_POS(data, inst, kRegH);
|
|
}
|
|
|
|
// STR <St>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_S_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_POS(data, inst, kRegS);
|
|
}
|
|
|
|
// STR <Dt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_D_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_POS(data, inst, kRegD);
|
|
}
|
|
|
|
// STR <Qt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeSTR_Q_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_POS(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeSTR_Vn_LDST_REGOFF(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
} else if (!(data.option & 2)) { // Sub word indexing.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`.
|
|
}
|
|
auto shift = (data.S == 1) ? scale : 0U;
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto rclass = ExtendTypeToRegClass(extend_type);
|
|
AddRegOperand(inst, kActionRead, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 8U << scale, data.Rn, 0);
|
|
AddExtendRegOperand(inst, rclass, kUseAsValue, data.Rm, extend_type, 64,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// STR <Qt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeSTR_Q_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_REGOFF(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeSTR_Vn_LDST_IMMPRE(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale < 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionRead, val_class, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionWrite, num_bits, data.Rn, offset);
|
|
return true;
|
|
}
|
|
// STR <Qt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeSTR_Q_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSTR_Vn_LDST_IMMPRE(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDR_Vn_LDST_POS(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionWrite, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, num_bits, data.Rn,
|
|
static_cast<uint64_t>(data.imm12.uimm) << scale);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Bt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_B_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_POS(data, inst, kRegB);
|
|
}
|
|
|
|
// LDR <Ht>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_H_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_POS(data, inst, kRegH);
|
|
}
|
|
|
|
// LDR <St>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_S_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_POS(data, inst, kRegS);
|
|
}
|
|
// LDR <Dt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_D_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_POS(data, inst, kRegD);
|
|
}
|
|
|
|
// LDR <Qt>, [<Xn|SP>{, #<pimm>}]
|
|
bool TryDecodeLDR_Q_LDST_POS(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_POS(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDR_Vn_LDST_REGOFF(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
} else if (!(data.option & 2)) { // Sub word indexing.
|
|
return false; // `if option<1> == '0' then UnallocatedEncoding();`.
|
|
}
|
|
auto shift = (data.S == 1) ? scale : 0U;
|
|
auto extend_type = static_cast<Extend>(data.option);
|
|
auto rclass = ExtendTypeToRegClass(extend_type);
|
|
AddRegOperand(inst, kActionWrite, val_class, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 8U << scale, data.Rn, 0);
|
|
AddExtendRegOperand(inst, rclass, kUseAsValue, data.Rm, extend_type, 64,
|
|
shift);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Bt>, [<Xn|SP>, (<Wm>|<Xm>), <extend> {<amount>}]
|
|
bool TryDecodeLDR_B_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_REGOFF(data, inst, kRegB);
|
|
}
|
|
|
|
// LDR <Bt>, [<Xn|SP>, <Xm>{, LSL <amount>}]
|
|
bool TryDecodeLDR_BL_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_REGOFF(data, inst, kRegB);
|
|
}
|
|
|
|
// LDR <Ht>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDR_H_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_REGOFF(data, inst, kRegH);
|
|
}
|
|
|
|
// LDR <St>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDR_S_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_REGOFF(data, inst, kRegS);
|
|
}
|
|
|
|
// LDR <Dt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDR_D_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_REGOFF(data, inst, kRegD);
|
|
}
|
|
|
|
// LDR <Qt>, [<Xn|SP>, (<Wm>|<Xm>){, <extend> {<amount>}}]
|
|
bool TryDecodeLDR_Q_LDST_REGOFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_REGOFF(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDR_Vn_LDST_IMMPOST(const InstData &data,
|
|
Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionWrite, val_class, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPostIndexMemOp(inst, kActionRead, num_bits, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Bt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_B_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPOST(data, inst, kRegB);
|
|
}
|
|
|
|
// LDR <Ht>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_H_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPOST(data, inst, kRegH);
|
|
}
|
|
|
|
// LDR <St>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_S_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPOST(data, inst, kRegS);
|
|
}
|
|
|
|
// LDR <Dt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_D_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPOST(data, inst, kRegD);
|
|
}
|
|
|
|
// LDR <Qt>, [<Xn|SP>], #<simm>
|
|
bool TryDecodeLDR_Q_LDST_IMMPOST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPOST(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDR_Vn_LDST_IMMPRE(const InstData &data, Instruction &inst,
|
|
RegClass val_class) {
|
|
uint64_t scale = DecodeScale(data);
|
|
if (scale > 4) {
|
|
return false;
|
|
}
|
|
auto num_bits = ReadRegSize(val_class);
|
|
AddRegOperand(inst, kActionWrite, val_class, kUseAsValue, data.Rt);
|
|
uint64_t offset = static_cast<uint64_t>(data.imm9.simm9);
|
|
AddPreIndexMemOp(inst, kActionRead, num_bits, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Bt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_B_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPRE(data, inst, kRegB);
|
|
}
|
|
|
|
// LDR <Ht>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_H_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPRE(data, inst, kRegH);
|
|
}
|
|
|
|
// LDR <St>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_S_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPRE(data, inst, kRegS);
|
|
}
|
|
|
|
// LDR <Dt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_D_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPRE(data, inst, kRegD);
|
|
}
|
|
|
|
// LDR <Qt>, [<Xn|SP>, #<simm>]!
|
|
bool TryDecodeLDR_Q_LDST_IMMPRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDR_Vn_LDST_IMMPRE(data, inst, kRegQ);
|
|
}
|
|
|
|
// LDR <St>, <label>
|
|
bool TryDecodeLDR_S_LOADLIT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegS, kUseAsValue, data.Rt);
|
|
AddPCRegMemOp(inst, kActionRead,
|
|
static_cast<uint64_t>(data.imm19.simm19) << 2ULL);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Dt>, <label>
|
|
bool TryDecodeLDR_D_LOADLIT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegD, kUseAsValue, data.Rt);
|
|
AddPCRegMemOp(inst, kActionRead,
|
|
static_cast<uint64_t>(data.imm19.simm19) << 2ULL);
|
|
return true;
|
|
}
|
|
|
|
// LDR <Qt>, <label>
|
|
bool TryDecodeLDR_Q_LOADLIT(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegQ, kUseAsValue, data.Rt);
|
|
AddPCRegMemOp(inst, kActionRead,
|
|
static_cast<uint64_t>(data.imm19.simm19) << 2ULL);
|
|
return true;
|
|
}
|
|
|
|
static bool TryDecodeLDP_Vn_LDSTPAIR_POST(const InstData &data,
|
|
Instruction &inst, RegClass rclass) {
|
|
auto size = ReadRegSize(rclass);
|
|
auto scale = 2U + data.opc;
|
|
if (data.opc == 0x3) {
|
|
return false; // `if opc == '11' then UnallocatedEncoding();`.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt2);
|
|
AddPostIndexMemOp(inst, kActionRead, size * 2, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << scale);
|
|
return true;
|
|
}
|
|
|
|
// LDP <St1>, <St2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDP_S_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_POST(data, inst, kRegS);
|
|
}
|
|
|
|
// LDP <Dt1>, <Dt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDP_D_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_POST(data, inst, kRegD);
|
|
}
|
|
|
|
// LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>
|
|
bool TryDecodeLDP_Q_LDSTPAIR_POST(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_POST(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDP_Vn_LDSTPAIR_PRE(const InstData &data,
|
|
Instruction &inst, RegClass rclass) {
|
|
auto size = ReadRegSize(rclass);
|
|
auto scale = 2U + data.opc;
|
|
if (data.opc == 0x3) {
|
|
return false; // `if opc == '11' then UnallocatedEncoding();`.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt2);
|
|
AddPreIndexMemOp(inst, kActionRead, size * 2, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << scale);
|
|
return true;
|
|
}
|
|
|
|
// LDP <St1>, <St2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeLDP_S_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_PRE(data, inst, kRegS);
|
|
}
|
|
|
|
// LDP <Dt1>, <Dt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeLDP_D_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_PRE(data, inst, kRegD);
|
|
}
|
|
|
|
// LDP <Qt1>, <Qt2>, [<Xn|SP>, #<imm>]!
|
|
bool TryDecodeLDP_Q_LDSTPAIR_PRE(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_PRE(data, inst, kRegQ);
|
|
}
|
|
|
|
static bool TryDecodeLDP_Vn_LDSTPAIR_OFF(const InstData &data,
|
|
Instruction &inst, RegClass rclass) {
|
|
auto size = ReadRegSize(rclass);
|
|
auto scale = 2U + data.opc;
|
|
if (data.opc == 0x3) {
|
|
return false; // `if opc == '11' then UnallocatedEncoding();`.
|
|
}
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt);
|
|
AddRegOperand(inst, kActionWrite, rclass, kUseAsValue, data.Rt2);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, size * 2, data.Rn,
|
|
static_cast<uint64_t>(data.imm7.simm7) << scale);
|
|
return true;
|
|
}
|
|
|
|
// LDP <St1>, <St2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeLDP_S_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_OFF(data, inst, kRegS);
|
|
}
|
|
|
|
// LDP <Dt1>, <Dt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeLDP_D_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_OFF(data, inst, kRegD);
|
|
}
|
|
|
|
// LDP <Qt1>, <Qt2>, [<Xn|SP>{, #<imm>}]
|
|
bool TryDecodeLDP_Q_LDSTPAIR_OFF(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDP_Vn_LDSTPAIR_OFF(data, inst, kRegQ);
|
|
}
|
|
|
|
// CLZ <Wd>, <Wn>
|
|
bool TryDecodeCLZ_32_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// CLZ <Xd>, <Xn>
|
|
bool TryDecodeCLZ_64_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
static bool DecodeConditionalRegSelect(const InstData &data, Instruction &inst,
|
|
RegClass r_class, int n_regs,
|
|
bool invert_cond = false) {
|
|
CHECK(1 <= n_regs && n_regs <= 3);
|
|
|
|
AddRegOperand(inst, kActionWrite, r_class, kUseAsValue, data.Rd);
|
|
if (--n_regs > 0) {
|
|
AddRegOperand(inst, kActionRead, r_class, kUseAsValue, data.Rn);
|
|
}
|
|
if (--n_regs > 0) {
|
|
AddRegOperand(inst, kActionRead, r_class, kUseAsValue, data.Rm);
|
|
}
|
|
|
|
// Condition will be part of the isel, not an operand.
|
|
SetConditionalFunctionName(data, inst, invert_cond);
|
|
return true;
|
|
}
|
|
|
|
// CSEL <Wd>, <Wn>, <Wm>, <cond>
|
|
bool TryDecodeCSEL_32_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegW, 3);
|
|
}
|
|
|
|
// CSEL <Xd>, <Xn>, <Xm>, <cond>
|
|
bool TryDecodeCSEL_64_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegX, 3);
|
|
}
|
|
|
|
// CSINC <Wd>, <Wn>, <Wm>, <cond>
|
|
bool TryDecodeCSINC_32_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegW, 3);
|
|
}
|
|
|
|
// CSINC <Xd>, <Xn>, <Xm>, <cond>
|
|
bool TryDecodeCSINC_64_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegX, 3);
|
|
}
|
|
|
|
// CSINV <Wd>, <Wn>, <Wm>, <cond>
|
|
bool TryDecodeCSINV_32_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegW, 3);
|
|
}
|
|
|
|
// CSINV <Xd>, <Xn>, <Xm>, <cond>
|
|
bool TryDecodeCSINV_64_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegX, 3);
|
|
}
|
|
|
|
// CSNEG <Wd>, <Wn>, <Wm>, <cond>
|
|
bool TryDecodeCSNEG_32_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegW, 3);
|
|
}
|
|
|
|
// CSNEG <Xd>, <Xn>, <Xm>, <cond>
|
|
bool TryDecodeCSNEG_64_CONDSEL(const InstData &data, Instruction &inst) {
|
|
return DecodeConditionalRegSelect(data, inst, kRegX, 3);
|
|
}
|
|
|
|
// CCMP <Wn>, #<imm>, #<nzcv>, <cond>
|
|
bool TryDecodeCCMP_32_CONDCMP_IMM(const InstData &data, Instruction &inst) {
|
|
SetConditionalFunctionName(data, inst);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.imm5.uimm);
|
|
AddImmOperand(inst, data.nzcv);
|
|
return true;
|
|
}
|
|
|
|
// CCMP <Xn>, #<imm>, #<nzcv>, <cond>
|
|
bool TryDecodeCCMP_64_CONDCMP_IMM(const InstData &data, Instruction &inst) {
|
|
SetConditionalFunctionName(data, inst);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.imm5.uimm);
|
|
AddImmOperand(inst, data.nzcv);
|
|
return true;
|
|
}
|
|
|
|
// CCMP <Wn>, <Wm>, #<nzcv>, <cond>
|
|
bool TryDecodeCCMP_32_CONDCMP_REG(const InstData &data, Instruction &inst) {
|
|
SetConditionalFunctionName(data, inst);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rm);
|
|
AddImmOperand(inst, data.nzcv);
|
|
return true;
|
|
}
|
|
|
|
// CCMP <Xn>, <Xm>, #<nzcv>, <cond>
|
|
bool TryDecodeCCMP_64_CONDCMP_REG(const InstData &data, Instruction &inst) {
|
|
SetConditionalFunctionName(data, inst);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rm);
|
|
AddImmOperand(inst, data.nzcv);
|
|
return true;
|
|
}
|
|
|
|
// CCMN <Wn>, #<imm>, #<nzcv>, <cond>
|
|
bool TryDecodeCCMN_32_CONDCMP_IMM(const InstData &data, Instruction &inst) {
|
|
SetConditionalFunctionName(data, inst);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.imm5.uimm);
|
|
AddImmOperand(inst, data.nzcv);
|
|
return true;
|
|
}
|
|
|
|
// CCMN <Xn>, #<imm>, #<nzcv>, <cond>
|
|
bool TryDecodeCCMN_64_CONDCMP_IMM(const InstData &data, Instruction &inst) {
|
|
SetConditionalFunctionName(data, inst);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.imm5.uimm);
|
|
AddImmOperand(inst, data.nzcv);
|
|
return true;
|
|
}
|
|
|
|
// ORR <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeORR_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
std::stringstream ss;
|
|
ss << inst.function << "_" << (data.Q ? "16B" : "8B");
|
|
inst.function = ss.str();
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rm);
|
|
return true;
|
|
}
|
|
|
|
// AND <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeAND_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeORR_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// BICS <Wd>, <Wn>, <Wm>{, <shift> #<amount>}
|
|
bool TryDecodeBICS_32_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeBIC_32_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// BICS <Xd>, <Xn>, <Xm>{, <shift> #<amount>}
|
|
bool TryDecodeBICS_64_LOG_SHIFT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeBIC_64_LOG_SHIFT(data, inst);
|
|
}
|
|
|
|
// LDARB <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDARB_LR32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 8, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// LDARH <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDARH_LR32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 16, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// LDAR <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDAR_LR32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 32, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// LDAR <Xt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDAR_LR64_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 64, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// REV16 <Wd>, <Wn>
|
|
bool TryDecodeREV16_32_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegW);
|
|
}
|
|
|
|
// REV16 <Xd>, <Xn>
|
|
bool TryDecodeREV16_64_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegX);
|
|
}
|
|
|
|
// REV <Wd>, <Wn>
|
|
bool TryDecodeREV_32_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegW);
|
|
}
|
|
|
|
// REV32 <Xd>, <Xn>
|
|
bool TryDecodeREV32_64_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegX);
|
|
}
|
|
|
|
// REV <Xd>, <Xn>
|
|
bool TryDecodeREV_64_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegX);
|
|
}
|
|
|
|
// REV16 <Vd>.<T>, <Vn>.<T>
|
|
bool TryDecodeREV16_ASIMDMISC_R(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
// REV32 <Vd>.<T>, <Vn>.<T>
|
|
bool TryDecodeREV32_ASIMDMISC_R(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
// REV64 <Vd>.<T>, <Vn>.<T>
|
|
bool TryDecodeREV64_ASIMDMISC_R(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
static void AddQArrangementSpecifier(const InstData &data, Instruction &inst,
|
|
const char *if_Q, const char *if_not_Q) {
|
|
std::stringstream ss;
|
|
ss << inst.function << "_" << (data.Q ? if_Q : if_not_Q);
|
|
inst.function = ss.str();
|
|
}
|
|
|
|
static const char *ArrangementSpecifier(uint64_t total_size,
|
|
uint64_t element_size) {
|
|
if (128 == total_size) {
|
|
switch (element_size) {
|
|
case 8: return "16B";
|
|
case 16: return "8H";
|
|
case 32: return "4S";
|
|
case 64: return "2D";
|
|
default: break;
|
|
}
|
|
} else if (64 == total_size) {
|
|
switch (element_size) {
|
|
case 8: return "8B";
|
|
case 16: return "4H";
|
|
case 32: return "2S";
|
|
case 64: return "1D";
|
|
default: break;
|
|
}
|
|
}
|
|
|
|
LOG(FATAL) << "Can't deduce specifier for " << total_size << "-vector with "
|
|
<< element_size << "-bit elements";
|
|
return nullptr;
|
|
}
|
|
|
|
static void AddArrangementSpecifier(Instruction &inst, uint64_t total_size,
|
|
uint64_t element_size) {
|
|
std::stringstream ss;
|
|
ss << inst.function;
|
|
ss << "_" << ArrangementSpecifier(total_size, element_size);
|
|
inst.function = ss.str();
|
|
}
|
|
|
|
// DUP <Vd>.<T>, <R><n>
|
|
bool TryDecodeDUP_ASIMDINS_DR_R(const InstData &data, Instruction &inst) {
|
|
uint64_t size = 0;
|
|
if (!LeastSignificantSetBit(data.imm5.uimm, &size) || size > 3) {
|
|
return false; // `if size > 3 then UnallocatedEncoding();`
|
|
} else if (size == 3 && !data.Q) {
|
|
return false; // `if size == 3 && Q == '0' then ReservedValue();`
|
|
}
|
|
|
|
AddArrangementSpecifier(inst, data.Q ? 128 : 64, 8UL << size);
|
|
AddRegOperand(inst, kActionWrite, data.Q ? kRegQ : kRegD, kUseAsValue,
|
|
data.Rd);
|
|
AddRegOperand(inst, kActionRead, size == 3 ? kRegX : kRegW, kUseAsValue,
|
|
data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// ADD <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeADD_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
if (0x3 == data.size && !data.Q) {
|
|
return false; // `if size:Q == '110' then ReservedValue();`.
|
|
}
|
|
AddArrangementSpecifier(inst, data.Q ? 128 : 64, 8UL << data.size);
|
|
return TryDecodeRdW_Rn_Rm(data, inst, data.Q ? kRegQ : kRegD);
|
|
}
|
|
|
|
// SUB <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeSUB_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
static bool TryDecodeLDnSTnOpcode(uint8_t opcode, uint64_t *rpt,
|
|
uint64_t *selem) {
|
|
switch (opcode) {
|
|
case 0: // `0000`, LD/ST4 (4 registers).
|
|
*rpt = 1;
|
|
*selem = 4;
|
|
return true;
|
|
case 2: // `0010`, LD/ST1 (4 registers).
|
|
*rpt = 4;
|
|
*selem = 1;
|
|
return true;
|
|
case 4: // `0100`, LD/ST3 (3 registers).
|
|
*rpt = 1;
|
|
*selem = 3;
|
|
return true;
|
|
case 6: // `0110`, LD/ST1 (3 registers).
|
|
*rpt = 3;
|
|
*selem = 1;
|
|
return true;
|
|
case 7: // `0111`, LD/ST1 (1 register).
|
|
*rpt = 1;
|
|
*selem = 1;
|
|
return true;
|
|
case 8: // `1000`, LD/ST2 (2 registers).
|
|
*rpt = 1;
|
|
*selem = 2;
|
|
return true;
|
|
case 10: // `1010`, LD/ST1 (2 registers).
|
|
*rpt = 2;
|
|
*selem = 1;
|
|
return true;
|
|
default: return false; // `UnallocatedEncoding();`.
|
|
}
|
|
}
|
|
|
|
// EXT <Vd>.<T>, <Vn>.<T>, <Vm>.<T>, #<index>
|
|
bool TryDecodeEXT_ASIMDEXT_ONLY(const InstData &data, Instruction &inst) {
|
|
if (!data.Q && data.imm4.uimm & 0x8) {
|
|
return false; // `if Q == '0' and imm4<3> == '1' then UnallocatedEncoding();`
|
|
}
|
|
AddQArrangementSpecifier(data, inst, "16B", "8B");
|
|
TryDecodeRdW_Rn_Rm(data, inst, kRegV);
|
|
AddImmOperand(inst, data.imm4.uimm, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// Load/store one or more data structures.
|
|
bool TryDecodeLDnSTn(const InstData &data, Instruction &inst,
|
|
uint64_t *total_num_bytes) {
|
|
uint64_t rpt = 0;
|
|
uint64_t selem = 0;
|
|
if (!TryDecodeLDnSTnOpcode(data.opcode, &rpt, &selem)) {
|
|
return false;
|
|
} else if (0x3 == data.size && !data.Q && selem != 1) {
|
|
return false; // `if size:Q == '110' && selem != 1 then ReservedValue()`.
|
|
}
|
|
uint64_t data_size = data.Q ? 128 : 64;
|
|
uint64_t esize = 8UL << data.size;
|
|
uint64_t elements = data_size / esize;
|
|
uint64_t ebytes = esize / 8;
|
|
if (total_num_bytes) {
|
|
*total_num_bytes = ebytes * rpt * elements * selem;
|
|
}
|
|
AddArrangementSpecifier(inst, data_size, 8UL << data.size);
|
|
auto t = static_cast<uint8_t>(data.Rt);
|
|
auto num_regs = static_cast<uint8_t>(rpt * selem);
|
|
for (uint8_t i = 0; i < num_regs; ++i) {
|
|
auto tt = static_cast<aarch64::RegNum>((t + i) % 32);
|
|
AddRegOperand(inst, kActionWrite, data.Q ? kRegQ : kRegD, kUseAsValue, tt);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// ST1 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeST1_ASISDLSEP_I2_I2(const InstData &data, Instruction &inst) {
|
|
uint64_t offset = 0;
|
|
if (!TryDecodeLDnSTn(data, inst, &offset)) {
|
|
return false;
|
|
}
|
|
AddPostIndexMemOp(inst, kActionWrite, offset * 8, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// ST1 { <Vt>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeST1_ASISDLSE_R1_1V(const InstData &data, Instruction &inst) {
|
|
uint64_t num_bytes = 0;
|
|
if (!TryDecodeLDnSTn(data, inst, &num_bytes)) {
|
|
return false;
|
|
}
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, num_bytes * 8, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// ST1 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeST1_ASISDLSE_R2_2V(const InstData &data, Instruction &inst) {
|
|
return TryDecodeST1_ASISDLSE_R1_1V(data, inst);
|
|
}
|
|
|
|
|
|
// LD1 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeLD1_ASISDLSEP_I2_I2(const InstData &data, Instruction &inst) {
|
|
uint64_t offset = 0;
|
|
if (!TryDecodeLDnSTn(data, inst, &offset)) {
|
|
return false;
|
|
}
|
|
AddPostIndexMemOp(inst, kActionRead, offset * 8, data.Rn, offset);
|
|
return true;
|
|
}
|
|
|
|
// LD1 { <Vt>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeLD1_ASISDLSEP_I1_I1(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSEP_I2_I2(data, inst);
|
|
}
|
|
|
|
// LD1 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeLD1_ASISDLSEP_I3_I3(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSEP_I2_I2(data, inst);
|
|
}
|
|
|
|
// LD1 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>, <Vt4>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeLD1_ASISDLSEP_I4_I4(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSEP_I2_I2(data, inst);
|
|
}
|
|
|
|
// CMEQ <Vd>.<T>, <Vn>.<T>, #0
|
|
bool TryDecodeCMEQ_ASIMDMISC_Z(const InstData &data, Instruction &inst) {
|
|
if (data.size == 3 && !data.Q) {
|
|
return false; // `if size:Q == '110' then ReservedValue();`.
|
|
}
|
|
AddArrangementSpecifier(inst, data.Q ? 128 : 64, 8UL << data.size);
|
|
TryDecodeRdW_Rn(data, inst, data.Q ? kRegQ : kRegD);
|
|
AddImmOperand(inst, 0, kUnsigned, 8UL << data.size);
|
|
return true;
|
|
}
|
|
|
|
// CMLT <Vd>.<T>, <Vn>.<T>, #0
|
|
bool TryDecodeCMLT_ASIMDMISC_Z(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDMISC_Z(data, inst);
|
|
}
|
|
|
|
// CMLE <Vd>.<T>, <Vn>.<T>, #0
|
|
bool TryDecodeCMLE_ASIMDMISC_Z(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDMISC_Z(data, inst);
|
|
}
|
|
|
|
// CMGT <Vd>.<T>, <Vn>.<T>, #0
|
|
bool TryDecodeCMGT_ASIMDMISC_Z(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDMISC_Z(data, inst);
|
|
}
|
|
|
|
// CMGE <Vd>.<T>, <Vn>.<T>, #0
|
|
bool TryDecodeCMGE_ASIMDMISC_Z(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDMISC_Z(data, inst);
|
|
}
|
|
|
|
// CMEQ <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeCMEQ_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
if (data.size == 3 && !data.Q) {
|
|
return false; // `if size:Q == '110' then ReservedValue();`.
|
|
}
|
|
AddArrangementSpecifier(inst, data.Q ? 128 : 64, 8UL << data.size);
|
|
return TryDecodeRdW_Rn_Rm(data, inst, data.Q ? kRegQ : kRegD);
|
|
}
|
|
|
|
// CMGE <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeCMGE_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// CMGT <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeCMGT_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// CMTST <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeCMTST_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeCMEQ_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// ADDP <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeADDP_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADD_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// UMAXP <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeUMAXP_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
if (0x3 == data.size) {
|
|
return false; // `if size == '11' then ReservedValue();`.
|
|
}
|
|
AddArrangementSpecifier(inst, data.Q ? 128 : 64, 8UL << data.size);
|
|
return TryDecodeRdW_Rn_Rm(data, inst, data.Q ? kRegQ : kRegD);
|
|
}
|
|
|
|
// SMAXP <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeSMAXP_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// UMINP <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeUMINP_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// SMINP <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeSMINP_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// UMIN <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeUMIN_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// UMAX <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeUMAX_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// SMIN <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeSMIN_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// SMAX <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeSMAX_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMAXP_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// UMOV <Wd>, <Vn>.<Ts>[<index>]
|
|
bool TryDecodeUMOV_ASIMDINS_W_W(const InstData &data, Instruction &inst) {
|
|
uint64_t size = 0;
|
|
if (!LeastSignificantSetBit(data.imm5.uimm, &size) || size > 3) {
|
|
return false; // `if size > 3 then UnallocatedEncoding();`
|
|
} else if (data.Q && size < 3) {
|
|
return false;
|
|
}
|
|
std::stringstream ss;
|
|
ss << inst.function;
|
|
switch (size) {
|
|
case 0: ss << "_B"; break;
|
|
case 1: ss << "_H"; break;
|
|
case 2: ss << "_S"; break;
|
|
case 3: ss << "_D"; break;
|
|
default: return false;
|
|
}
|
|
inst.function = ss.str();
|
|
AddRegOperand(inst, kActionWrite, data.Q ? kRegX : kRegW, kUseAsValue,
|
|
data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.imm5.uimm >> (size + 1));
|
|
return true;
|
|
}
|
|
|
|
// UMOV <Xd>, <Vn>.<Ts>[<index>]
|
|
bool TryDecodeUMOV_ASIMDINS_X_X(const InstData &data, Instruction &inst) {
|
|
return TryDecodeUMOV_ASIMDINS_W_W(data, inst);
|
|
}
|
|
|
|
// SMOV <Wd>, <Vn>.<Ts>[<index>]
|
|
bool TryDecodeSMOV_ASIMDINS_W_W(const InstData &data, Instruction &inst) {
|
|
uint64_t size = 0;
|
|
if (!LeastSignificantSetBit(data.imm5.uimm, &size) || size > 2) {
|
|
return false; // `if size > 3 then UnallocatedEncoding();`
|
|
} else if (size == 2 && !data.Q) {
|
|
return false;
|
|
}
|
|
std::stringstream ss;
|
|
ss << inst.function;
|
|
switch (size) {
|
|
case 0: ss << "_B"; break;
|
|
case 1: ss << "_H"; break;
|
|
case 2: ss << "_S"; break;
|
|
default: return false;
|
|
}
|
|
inst.function = ss.str();
|
|
AddRegOperand(inst, kActionWrite, data.Q ? kRegX : kRegW, kUseAsValue,
|
|
data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, data.imm5.uimm >> (size + 1));
|
|
return true;
|
|
}
|
|
|
|
// SMOV <Xd>, <Vn>.<Ts>[<index>]
|
|
bool TryDecodeSMOV_ASIMDINS_X_X(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSMOV_ASIMDINS_W_W(data, inst);
|
|
}
|
|
|
|
// RBIT <Wd>, <Wn>
|
|
bool TryDecodeRBIT_32_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegW);
|
|
}
|
|
|
|
// RBIT <Xd>, <Xn>
|
|
bool TryDecodeRBIT_64_DP_1SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn(data, inst, kRegX);
|
|
}
|
|
|
|
// SDIV <Wd>, <Wn>, <Wm>
|
|
bool TryDecodeSDIV_32_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegW);
|
|
}
|
|
|
|
// SDIV <Xd>, <Xn>, <Xm>
|
|
bool TryDecodeSDIV_64_DP_2SRC(const InstData &data, Instruction &inst) {
|
|
return TryDecodeRdW_Rn_Rm(data, inst, kRegX);
|
|
}
|
|
|
|
static bool TryDecodeSCVTF_Sn_FLOAT2INT(const InstData &data, Instruction &inst,
|
|
RegClass dest_class,
|
|
RegClass src_class) {
|
|
if (0x3 == data.type) {
|
|
return false; // `case type of ... when '10' UnallocatedEncoding();`
|
|
}
|
|
AddRegOperand(inst, kActionWrite, dest_class, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, src_class, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// SCVTF <Hd>, <Wn>
|
|
bool TryDecodeSCVTF_H32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSCVTF_Sn_FLOAT2INT(data, inst, kRegH, kRegW);
|
|
}
|
|
|
|
// SCVTF <Sd>, <Wn>
|
|
bool TryDecodeSCVTF_S32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSCVTF_Sn_FLOAT2INT(data, inst, kRegS, kRegW);
|
|
}
|
|
|
|
// SCVTF <Dd>, <Wn>
|
|
bool TryDecodeSCVTF_D32_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSCVTF_Sn_FLOAT2INT(data, inst, kRegD, kRegW);
|
|
}
|
|
|
|
// SCVTF <Hd>, <Xn>
|
|
bool TryDecodeSCVTF_H64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSCVTF_Sn_FLOAT2INT(data, inst, kRegH, kRegX);
|
|
}
|
|
|
|
// SCVTF <Sd>, <Xn>
|
|
bool TryDecodeSCVTF_S64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSCVTF_Sn_FLOAT2INT(data, inst, kRegS, kRegX);
|
|
}
|
|
|
|
// SCVTF <Dd>, <Xn>
|
|
bool TryDecodeSCVTF_D64_FLOAT2INT(const InstData &data, Instruction &inst) {
|
|
return TryDecodeSCVTF_Sn_FLOAT2INT(data, inst, kRegD, kRegX);
|
|
}
|
|
|
|
// BIC <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeBIC_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeORR_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// EOR <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeEOR_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeORR_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// BIT <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeBIT_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
AddQArrangementSpecifier(data, inst, "16B", "8B");
|
|
AddRegOperand(inst, kActionReadWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rm);
|
|
return true;
|
|
}
|
|
|
|
// BIF <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeBIF_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeBIT_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// BSL <Vd>.<T>, <Vn>.<T>, <Vm>.<T>
|
|
bool TryDecodeBSL_ASIMDSAME_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeBIT_ASIMDSAME_ONLY(data, inst);
|
|
}
|
|
|
|
// ADDV <V><d>, <Vn>.<T>
|
|
bool TryDecodeADDV_ASIMDALL_ONLY(const InstData &data, Instruction &inst) {
|
|
if (data.size == 0x2 && !data.Q) {
|
|
return false; // `if size:Q == '100' then ReservedValue();`
|
|
} else if (data.size == 0x3) {
|
|
return false; // `if size == '11' then ReservedValue();`.
|
|
}
|
|
const uint64_t esize = 8ULL << data.size;
|
|
const uint64_t datasize = data.Q ? 128 : 64;
|
|
AddArrangementSpecifier(inst, datasize, esize);
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// UMINV <V><d>, <Vn>.<T>
|
|
bool TryDecodeUMINV_ASIMDALL_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADDV_ASIMDALL_ONLY(data, inst);
|
|
}
|
|
|
|
// UMAXV <V><d>, <Vn>.<T>
|
|
bool TryDecodeUMAXV_ASIMDALL_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADDV_ASIMDALL_ONLY(data, inst);
|
|
}
|
|
|
|
// SMAXV <V><d>, <Vn>.<T>
|
|
bool TryDecodeSMAXV_ASIMDALL_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADDV_ASIMDALL_ONLY(data, inst);
|
|
}
|
|
|
|
// SMINV <V><d>, <Vn>.<T>
|
|
bool TryDecodeSMINV_ASIMDALL_ONLY(const InstData &data, Instruction &inst) {
|
|
return TryDecodeADDV_ASIMDALL_ONLY(data, inst);
|
|
}
|
|
|
|
// FMAXV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMAXV_ASIMDALL_ONLY_H(const InstData &data, Instruction &inst) {
|
|
AddQArrangementSpecifier(data, inst, "8H", "4H");
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMAXV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMAXV_ASIMDALL_ONLY_SD(const InstData &data, Instruction &inst) {
|
|
if (!(!data.sz && data.Q)) {
|
|
return false; // `if sz:Q != '01' then ReservedValue();`
|
|
}
|
|
inst.function += "_4S";
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// FMINNMV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMINNMV_ASIMDALL_ONLY_H(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFMAXV_ASIMDALL_ONLY_H(data, inst);
|
|
}
|
|
|
|
// FMINNMV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMINNMV_ASIMDALL_ONLY_SD(const InstData &data,
|
|
Instruction &inst) {
|
|
return TryDecodeFMAXV_ASIMDALL_ONLY_SD(data, inst);
|
|
}
|
|
|
|
// FMAXNMV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMAXNMV_ASIMDALL_ONLY_H(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFMAXV_ASIMDALL_ONLY_H(data, inst);
|
|
}
|
|
|
|
// FMAXNMV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMAXNMV_ASIMDALL_ONLY_SD(const InstData &data,
|
|
Instruction &inst) {
|
|
return TryDecodeFMAXV_ASIMDALL_ONLY_SD(data, inst);
|
|
}
|
|
|
|
// FMINV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMINV_ASIMDALL_ONLY_H(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFMAXV_ASIMDALL_ONLY_H(data, inst);
|
|
}
|
|
|
|
// FMINV <V><d>, <Vn>.<T>
|
|
bool TryDecodeFMINV_ASIMDALL_ONLY_SD(const InstData &data, Instruction &inst) {
|
|
return TryDecodeFMAXV_ASIMDALL_ONLY_SD(data, inst);
|
|
}
|
|
|
|
// UADDLV <V><d>, <Vn>.<T>
|
|
bool TryDecodeUADDLV_ASIMDALL_ONLY(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
// SADDLV <V><d>, <Vn>.<T>
|
|
bool TryDecodeSADDLV_ASIMDALL_ONLY(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
// DMB <option>|#<imm>
|
|
bool TryDecodeDMB_BO_SYSTEM(const InstData &, Instruction &) {
|
|
return true;
|
|
}
|
|
|
|
// INS <Vd>.<Ts>[<index>], <R><n>
|
|
bool TryDecodeINS_ASIMDINS_IR_R(const InstData &data, Instruction &inst) {
|
|
uint64_t size = 0;
|
|
if (!LeastSignificantSetBit(data.imm5.uimm, &size) || size > 3) {
|
|
return false;
|
|
}
|
|
std::stringstream ss;
|
|
ss << inst.function;
|
|
switch (size) {
|
|
case 0: ss << "_B"; break;
|
|
case 1: ss << "_H"; break;
|
|
case 2: ss << "_S"; break;
|
|
case 3: ss << "_D"; break;
|
|
default: return false;
|
|
}
|
|
inst.function = ss.str();
|
|
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, data.imm5.uimm >> (size + 1));
|
|
AddRegOperand(inst, kActionRead, (size == 3) ? kRegX : kRegW, kUseAsValue,
|
|
data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// LD1 { <Vt>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD1_ASISDLSE_R1_1V(const InstData &data, Instruction &inst) {
|
|
uint64_t num_bytes = 0;
|
|
if (!TryDecodeLDnSTn(data, inst, &num_bytes)) {
|
|
return false;
|
|
}
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, num_bytes * 8, data.Rn, 0);
|
|
return true;
|
|
}
|
|
|
|
// LD2 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD2_ASISDLSE_R2(const InstData &data, Instruction &inst) {
|
|
if (data.size == 0x3 && !data.Q) {
|
|
return false; // Reserved (arrangement specifier 1D).
|
|
}
|
|
return TryDecodeLD1_ASISDLSE_R1_1V(data, inst);
|
|
}
|
|
|
|
// LD3 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD3_ASISDLSE_R3(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD2_ASISDLSE_R2(data, inst);
|
|
}
|
|
|
|
// LD4 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>, <Vt4>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD4_ASISDLSE_R4(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD2_ASISDLSE_R2(data, inst);
|
|
}
|
|
|
|
// LD1 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD1_ASISDLSE_R2_2V(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSE_R1_1V(data, inst);
|
|
}
|
|
|
|
// LD1 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD1_ASISDLSE_R3_3V(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSE_R1_1V(data, inst);
|
|
}
|
|
|
|
// LD1 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>, <Vt4>.<T> }, [<Xn|SP>]
|
|
bool TryDecodeLD1_ASISDLSE_R4_4V(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSE_R1_1V(data, inst);
|
|
}
|
|
|
|
// LD2 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeLD2_ASISDLSEP_I2_I(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLD1_ASISDLSEP_I2_I2(data, inst);
|
|
}
|
|
|
|
// LD2 { <Vt>.<T>, <Vt2>.<T> }, [<Xn|SP>], <Xm>
|
|
bool TryDecodeLD2_ASISDLSEP_R2_R(const InstData &data, Instruction &inst) {
|
|
uint64_t offset = 0;
|
|
if (!TryDecodeLDnSTn(data, inst, &offset)) {
|
|
return false;
|
|
}
|
|
AddPostIndexMemOp(inst, kActionRead, offset * 8, data.Rn, data.Rm);
|
|
return true;
|
|
}
|
|
|
|
// LD4 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>, <Vt4>.<T> }, [<Xn|SP>], <imm>
|
|
bool TryDecodeLD4_ASISDLSEP_I4_I(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
// LD4 { <Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>, <Vt4>.<T> }, [<Xn|SP>], <Xm>
|
|
bool TryDecodeLD4_ASISDLSEP_R4_R(const InstData &, Instruction &) {
|
|
return false;
|
|
}
|
|
|
|
// NOT <Vd>.<T>, <Vn>.<T>
|
|
bool TryDecodeNOT_ASIMDMISC_R(const InstData &data, Instruction &inst) {
|
|
const uint64_t datasize = data.Q ? 128 : 64;
|
|
AddArrangementSpecifier(inst, datasize, 8);
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
return true;
|
|
}
|
|
|
|
// LDAXR <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDAXR_LR32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDXR_LR32_LDSTEXCL(data, inst);
|
|
}
|
|
|
|
// LDAXR <Xt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDAXR_LR64_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
return TryDecodeLDXR_LR64_LDSTEXCL(data, inst);
|
|
}
|
|
|
|
// LDXR <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDXR_LR32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
inst.is_atomic_read_modify_write = true;
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 32, data.Rn, 0);
|
|
AddMonitorOperand(inst);
|
|
return true;
|
|
}
|
|
|
|
// LDXR <Xt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeLDXR_LR64_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
inst.is_atomic_read_modify_write = true;
|
|
AddRegOperand(inst, kActionWrite, kRegX, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionRead, 64, data.Rn, 0);
|
|
AddMonitorOperand(inst);
|
|
return true;
|
|
}
|
|
|
|
// STLXR <Ws>, <Wt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeSTLXR_SR32_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
inst.is_atomic_read_modify_write = true;
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rs);
|
|
AddRegOperand(inst, kActionRead, kRegW, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 32, data.Rn, 0);
|
|
AddMonitorOperand(inst);
|
|
return true;
|
|
}
|
|
|
|
// STLXR <Ws>, <Xt>, [<Xn|SP>{,#0}]
|
|
bool TryDecodeSTLXR_SR64_LDSTEXCL(const InstData &data, Instruction &inst) {
|
|
inst.is_atomic_read_modify_write = true;
|
|
AddRegOperand(inst, kActionWrite, kRegW, kUseAsValue, data.Rs);
|
|
AddRegOperand(inst, kActionRead, kRegX, kUseAsValue, data.Rt);
|
|
AddBasePlusOffsetMemOp(inst, kActionWrite, 64, data.Rn, 0);
|
|
AddMonitorOperand(inst);
|
|
return true;
|
|
}
|
|
|
|
static uint64_t ConcatABCDEFGHToU8(const InstData &data) {
|
|
uint64_t imm = data.a;
|
|
imm = (imm << 1) | data.b;
|
|
imm = (imm << 1) | data.c;
|
|
imm = (imm << 1) | data.d;
|
|
imm = (imm << 1) | data.e;
|
|
imm = (imm << 1) | data.f;
|
|
imm = (imm << 1) | data.g;
|
|
imm = (imm << 1) | data.h;
|
|
return imm;
|
|
}
|
|
|
|
static uint64_t ConcatAndReplicateABCDEFGHToU64(const InstData &data) {
|
|
auto a = Replicate(data.a, 1, 8);
|
|
auto b = Replicate(data.b, 1, 8);
|
|
auto c = Replicate(data.c, 1, 8);
|
|
auto d = Replicate(data.d, 1, 8);
|
|
auto e = Replicate(data.e, 1, 8);
|
|
auto f = Replicate(data.f, 1, 8);
|
|
auto g = Replicate(data.g, 1, 8);
|
|
auto h = Replicate(data.h, 1, 8);
|
|
uint64_t imm = a;
|
|
imm = (imm << 8) | b;
|
|
imm = (imm << 8) | c;
|
|
imm = (imm << 8) | d;
|
|
imm = (imm << 8) | e;
|
|
imm = (imm << 8) | f;
|
|
imm = (imm << 8) | g;
|
|
imm = (imm << 8) | h;
|
|
return imm;
|
|
}
|
|
|
|
// MOVI <Vd>.2D, #<imm>
|
|
bool TryDecodeMOVI_ASIMDIMM_D2_D(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, ConcatAndReplicateABCDEFGHToU64(data));
|
|
return true;
|
|
}
|
|
|
|
// MOVI <Vd>.<T>, #<imm8>{, LSL #0}
|
|
bool TryDecodeMOVI_ASIMDIMM_N_B(const InstData &data, Instruction &inst) {
|
|
AddQArrangementSpecifier(data, inst, "16B", "8B");
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, ConcatABCDEFGHToU8(data), kUnsigned, 8);
|
|
return true;
|
|
}
|
|
|
|
// MOVI <Vd>.<T>, #<imm8>{, LSL #<amount>}
|
|
bool TryDecodeMOVI_ASIMDIMM_L_HL(const InstData &data, Instruction &inst) {
|
|
AddQArrangementSpecifier(data, inst, "8H", "4H");
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
uint64_t shift = (data.cmode & 2) ? 8 : 0;
|
|
AddImmOperand(inst, ConcatABCDEFGHToU8(data) << shift, kUnsigned, 16);
|
|
return true;
|
|
}
|
|
|
|
// MOVI <Vd>.<T>, #<imm8>{, LSL #<amount>}
|
|
bool TryDecodeMOVI_ASIMDIMM_L_SL(const InstData &data, Instruction &inst) {
|
|
AddQArrangementSpecifier(data, inst, "4S", "2S");
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
uint64_t shift = 8 * ((data.cmode >> 1) & 3);
|
|
AddImmOperand(inst, ConcatABCDEFGHToU8(data) << shift, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// MOVI <Vd>.<T>, #<imm8>, MSL #<amount>
|
|
bool TryDecodeMOVI_ASIMDIMM_M_SM(const InstData &data, Instruction &inst) {
|
|
AddQArrangementSpecifier(data, inst, "4S", "2S");
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|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
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|
uint64_t shift = (data.cmode & 1) ? 16 : 8;
|
|
uint64_t ones = ~((~0ULL) << shift);
|
|
uint64_t imm = (ConcatABCDEFGHToU8(data) << shift) | ones;
|
|
AddImmOperand(inst, imm, kUnsigned, 32);
|
|
return true;
|
|
}
|
|
|
|
// MOVI <Dd>, #<imm>
|
|
bool TryDecodeMOVI_ASIMDIMM_D_DS(const InstData &data, Instruction &inst) {
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddImmOperand(inst, ConcatAndReplicateABCDEFGHToU64(data));
|
|
return true;
|
|
}
|
|
|
|
// MVNI <Vd>.<T>, #<imm8>{, LSL #<amount>}
|
|
bool TryDecodeMVNI_ASIMDIMM_L_HL(const InstData &data, Instruction &inst) {
|
|
if (!TryDecodeMOVI_ASIMDIMM_L_HL(data, inst)) {
|
|
return false;
|
|
}
|
|
auto &imm = inst.operands[inst.operands.size() - 1].imm.val;
|
|
imm = (~imm) & 0xFFFFULL;
|
|
return true;
|
|
}
|
|
|
|
// MVNI <Vd>.<T>, #<imm8>{, LSL #<amount>}
|
|
bool TryDecodeMVNI_ASIMDIMM_L_SL(const InstData &data, Instruction &inst) {
|
|
if (!TryDecodeMOVI_ASIMDIMM_L_SL(data, inst)) {
|
|
return false;
|
|
}
|
|
auto &imm = inst.operands[inst.operands.size() - 1].imm.val;
|
|
imm = (~imm) & 0xFFFFFFFFULL;
|
|
return true;
|
|
}
|
|
|
|
// MVNI <Vd>.<T>, #<imm8>, MSL #<amount>
|
|
bool TryDecodeMVNI_ASIMDIMM_M_SM(const InstData &data, Instruction &inst) {
|
|
if (!TryDecodeMOVI_ASIMDIMM_M_SM(data, inst)) {
|
|
return false;
|
|
}
|
|
auto &imm = inst.operands[inst.operands.size() - 1].imm.val;
|
|
imm = (~imm) & 0xFFFFFFFFULL;
|
|
return true;
|
|
}
|
|
|
|
// USHR <V><d>, <V><n>, #<shift>
|
|
bool TryDecodeUSHR_ASISDSHF_R(const InstData &data, Instruction &inst) {
|
|
if ((data.immh.uimm & 8) == 0) {
|
|
return false; // if immh<3> != '1' then ReservedValue();
|
|
}
|
|
uint64_t shift = 128 - ((data.immh.uimm << 3) + data.immb.uimm);
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, shift);
|
|
return true;
|
|
}
|
|
|
|
// USHR <Vd>.<T>, <Vn>.<T>, #<shift>
|
|
bool TryDecodeUSHR_ASIMDSHF_R(const InstData &data, Instruction &inst) {
|
|
return false; // TODO remove this after adding semantics for vector version
|
|
if (((data.immh.uimm & 8) != 0) && !data.Q) {
|
|
return false; // `if immh<3>:Q == '10' then ReservedValue();`
|
|
}
|
|
uint64_t esize = 0;
|
|
MostSignificantSetBit(data.immh.uimm, &esize);
|
|
esize = 8 << esize;
|
|
|
|
const uint64_t datasize = data.Q ? 128 : 64;
|
|
AddArrangementSpecifier(inst, datasize, esize);
|
|
|
|
// AddArrangementSpecifier(inst, 128, 8UL << data.size);
|
|
|
|
uint64_t shift = (esize * 2) - ((data.immh.uimm << 3) + data.immb.uimm);
|
|
AddRegOperand(inst, kActionWrite, kRegV, kUseAsValue, data.Rd);
|
|
AddRegOperand(inst, kActionRead, kRegV, kUseAsValue, data.Rn);
|
|
AddImmOperand(inst, shift);
|
|
return true;
|
|
}
|
|
|
|
} // namespace aarch64
|
|
|
|
auto Arch::GetAArch64(llvm::LLVMContext *context_, OSName os_name_,
|
|
ArchName arch_name_) -> ArchPtr {
|
|
return std::make_unique<AArch64Arch>(context_, os_name_, arch_name_);
|
|
}
|
|
|
|
} // namespace remill
|