mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
John Keiser
de8df0a05f
* Allow -f
* Support parse -s (force sse)
* Simplify flatten_bits
- Add directly to base instead of storing variable
- Don't modify base_ptr after beginning of function
- Eliminate base variable and increment base_ptr instead
* De-unroll the flatten_bits loops
* Decrease dependencies in stage 1
- Do all finalize_structurals work before computing the quote mask; mask
out the quote mask later
- Join find_whitespace_and_structurals and finalize_structurals into
single find_structurals call, to reduce variable leakage
- Rework pseudo_pred algorithm to refer to "primitive" for clarity and some
dependency reduction
- Rename quote_mask to in_string to describe what we're trying to
achieve ("mask" could mean many things)
- Break up find_quote_mask_and_bits into find_quote_mask and
invalid_string_bytes to reduce data leakage (i.e. don't expose quote bits
or odd_ends at all to find_structural_bits)
- Genericize overflow methods "follows" and "follows_odd_sequence" for
descriptiveness and possible lifting into a generic simd parsing library
* Mark branches as likely/unlikely
* Reorder and unroll+interleave stage 1 loop
* Nest the cnt > 16 branch inside cnt > 8
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#ifndef SIMDJSON_COMMON_DEFS_H
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#define SIMDJSON_COMMON_DEFS_H
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#include "simdjson/portability.h"
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#include <cassert>
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// we support documents up to 4GB
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#define SIMDJSON_MAXSIZE_BYTES 0xFFFFFFFF
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// the input buf should be readable up to buf + SIMDJSON_PADDING
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#ifdef __AVX2__
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#define SIMDJSON_PADDING sizeof(__m256i)
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#else
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// this is a stopgap; there should be a better description of the
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// main loop and its behavior that abstracts over this
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#define SIMDJSON_PADDING 32
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#endif
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#if defined(__GNUC__)
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// Marks a block with a name so that MCA analysis can see it.
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#define BEGIN_DEBUG_BLOCK(name) __asm volatile("# LLVM-MCA-BEGIN " #name);
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#define END_DEBUG_BLOCK(name) __asm volatile("# LLVM-MCA-END " #name);
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#define DEBUG_BLOCK(name, block) BEGIN_DEBUG_BLOCK(name); block; END_DEBUG_BLOCK(name);
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#else
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#define BEGIN_DEBUG_BLOCK(name)
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#define END_DEBUG_BLOCK(name)
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#define DEBUG_BLOCK(name, block)
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#endif
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#ifndef _MSC_VER
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// Implemented using Labels as Values which works in GCC and CLANG (and maybe
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// also in Intel's compiler), but won't work in MSVC.
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#define SIMDJSON_USE_COMPUTED_GOTO
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#endif
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// Align to N-byte boundary
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#define ROUNDUP_N(a, n) (((a) + ((n)-1)) & ~((n)-1))
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#define ROUNDDOWN_N(a, n) ((a) & ~((n)-1))
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#define ISALIGNED_N(ptr, n) (((uintptr_t)(ptr) & ((n)-1)) == 0)
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#ifdef _MSC_VER
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#define really_inline __forceinline
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#define never_inline __declspec(noinline)
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#define UNUSED
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#define WARN_UNUSED
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#ifndef likely
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#define likely(x) x
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#endif
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#ifndef unlikely
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#define unlikely(x) x
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#endif
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#else
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#define really_inline inline __attribute__((always_inline, unused))
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#define never_inline inline __attribute__((noinline, unused))
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#define UNUSED __attribute__((unused))
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#define WARN_UNUSED __attribute__((warn_unused_result))
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#ifndef likely
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#define likely(x) __builtin_expect(!!(x), 1)
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#endif
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#ifndef unlikely
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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#endif // MSC_VER
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#endif // SIMDJSON_COMMON_DEFS_H
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