implementations.h

#ifndef SIMDJSON_IMPLEMENTATIONS_H
#define SIMDJSON_IMPLEMENTATIONS_H
 
#include "simdjson/implementation-base.h"
 
//
// First, figure out which implementations can be run. Doing it here makes it so we don't have to worry about the order
// in which we include them.
//
 
#ifndef SIMDJSON_IMPLEMENTATION_ARM64
#define SIMDJSON_IMPLEMENTATION_ARM64 (SIMDJSON_IS_ARM64)
#endif
#define SIMDJSON_CAN_ALWAYS_RUN_ARM64 SIMDJSON_IMPLEMENTATION_ARM64 && SIMDJSON_IS_ARM64
 
#ifdef __has_include
// How do we detect that a compiler supports vbmi2?
// For sure if the following header is found, we are ok?
#if __has_include(<avx512vbmi2intrin.h>)
#define SIMDJSON_COMPILER_SUPPORTS_VBMI2 1
#endif
#endif
 
#ifdef _MSC_VER
#if _MSC_VER >= 1920
// Visual Studio 2019 and up support VBMI2 under x64 even if the header
// avx512vbmi2intrin.h is not found.
#define SIMDJSON_COMPILER_SUPPORTS_VBMI2 1
#endif
#endif
 
// By default, we allow AVX512.
#ifndef SIMDJSON_AVX512_ALLOWED
#define SIMDJSON_AVX512_ALLOWED 1
#endif
 
// Default Icelake to on if this is x86-64. Even if we're not compiled for it, it could be selected
// at runtime.
#ifndef SIMDJSON_IMPLEMENTATION_ICELAKE
#define SIMDJSON_IMPLEMENTATION_ICELAKE ((SIMDJSON_IS_X86_64) && (SIMDJSON_AVX512_ALLOWED) && (SIMDJSON_COMPILER_SUPPORTS_VBMI2))
#endif
 
#ifdef _MSC_VER
// To see why  (__BMI__) && (__PCLMUL__) && (__LZCNT__) are not part of this next line, see
// https://github.com/simdjson/simdjson/issues/1247
#define SIMDJSON_CAN_ALWAYS_RUN_ICELAKE ((SIMDJSON_IMPLEMENTATION_ICELAKE) && (__AVX2__) && (__AVX512F__) && (__AVX512DQ__) && (__AVX512CD__) && (__AVX512BW__) && (__AVX512VL__) && (__AVX512VBMI2__))
#else
#define SIMDJSON_CAN_ALWAYS_RUN_ICELAKE ((SIMDJSON_IMPLEMENTATION_ICELAKE) && (__AVX2__) && (__BMI__) && (__PCLMUL__) && (__LZCNT__) && (__AVX512F__) && (__AVX512DQ__) && (__AVX512CD__) && (__AVX512BW__) && (__AVX512VL__) && (__AVX512VBMI2__))
#endif
 
// Default Haswell to on if this is x86-64. Even if we're not compiled for it, it could be selected
// at runtime.
#ifndef SIMDJSON_IMPLEMENTATION_HASWELL
#if SIMDJSON_CAN_ALWAYS_RUN_ICELAKE
// if icelake is always available, never enable haswell.
#define SIMDJSON_IMPLEMENTATION_HASWELL 0
#else
#define SIMDJSON_IMPLEMENTATION_HASWELL SIMDJSON_IS_X86_64
#endif
#endif
#ifdef _MSC_VER
// To see why  (__BMI__) && (__PCLMUL__) && (__LZCNT__) are not part of this next line, see
// https://github.com/simdjson/simdjson/issues/1247
#define SIMDJSON_CAN_ALWAYS_RUN_HASWELL ((SIMDJSON_IMPLEMENTATION_HASWELL) && (SIMDJSON_IS_X86_64) && (__AVX2__))
#else
#define SIMDJSON_CAN_ALWAYS_RUN_HASWELL ((SIMDJSON_IMPLEMENTATION_HASWELL) && (SIMDJSON_IS_X86_64) && (__AVX2__) && (__BMI__) && (__PCLMUL__) && (__LZCNT__))
#endif
 
// Default Westmere to on if this is x86-64.
#ifndef SIMDJSON_IMPLEMENTATION_WESTMERE
#if SIMDJSON_CAN_ALWAYS_RUN_ICELAKE || SIMDJSON_CAN_ALWAYS_RUN_HASWELL
// if icelake or haswell are always available, never enable westmere.
#define SIMDJSON_IMPLEMENTATION_WESTMERE 0
#else
#define SIMDJSON_IMPLEMENTATION_WESTMERE SIMDJSON_IS_X86_64
#endif
#endif
#define SIMDJSON_CAN_ALWAYS_RUN_WESTMERE (SIMDJSON_IMPLEMENTATION_WESTMERE && SIMDJSON_IS_X86_64 && __SSE4_2__ && __PCLMUL__)
 
#ifndef SIMDJSON_IMPLEMENTATION_PPC64
#define SIMDJSON_IMPLEMENTATION_PPC64 (SIMDJSON_IS_PPC64 && SIMDJSON_IS_PPC64_VMX)
#endif
#define SIMDJSON_CAN_ALWAYS_RUN_PPC64 SIMDJSON_IMPLEMENTATION_PPC64 && SIMDJSON_IS_PPC64 && SIMDJSON_IS_PPC64_VMX
 
// Default Fallback to on unless a builtin implementation has already been selected.
#ifndef SIMDJSON_IMPLEMENTATION_FALLBACK
#if SIMDJSON_CAN_ALWAYS_RUN_ARM64 || SIMDJSON_CAN_ALWAYS_RUN_ICELAKE || SIMDJSON_CAN_ALWAYS_RUN_HASWELL || SIMDJSON_CAN_ALWAYS_RUN_WESTMERE || SIMDJSON_CAN_ALWAYS_RUN_PPC64
// if anything at all except fallback can always run, then disable fallback.
#define SIMDJSON_IMPLEMENTATION_FALLBACK 0
#else
#define SIMDJSON_IMPLEMENTATION_FALLBACK 1
#endif
#endif
#define SIMDJSON_CAN_ALWAYS_RUN_FALLBACK SIMDJSON_IMPLEMENTATION_FALLBACK
 
SIMDJSON_PUSH_DISABLE_WARNINGS
SIMDJSON_DISABLE_UNDESIRED_WARNINGS
 
// Implementations
#include "simdjson/arm64.h"
#include "simdjson/fallback.h"
#include "simdjson/icelake.h"
#include "simdjson/haswell.h"
#include "simdjson/ppc64.h"
#include "simdjson/westmere.h"
 
// Builtin implementation
#include "simdjson/builtin.h"
 
SIMDJSON_POP_DISABLE_WARNINGS
 
#endif // SIMDJSON_IMPLEMENTATIONS_H