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liblzma: Use a single macro to select CLMUL CRC to build 

This way it's clearer that two things cannot be selected
at the same time.
This commit is contained in:
Lasse Collin 2024-06-11 12:47:59 +03:00
parent d8fb098617
commit 20014c2614
3 changed files with 12 additions and 10 deletions
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2
src/liblzma/check/crc32_fast.c
View File

@ -15,7 +15,7 @@
#include "crc_common.h"
#if defined(CRC_X86_CLMUL)
# define BUILDING_CRC32_CLMUL
# define BUILDING_CRC_CLMUL 32
# include "crc_x86_clmul.h"
#elif defined(CRC32_ARM64)
# include "crc32_arm64.h"

2
src/liblzma/check/crc64_fast.c
View File

@ -14,7 +14,7 @@
#include "crc_common.h"
#if defined(CRC_X86_CLMUL)
# define BUILDING_CRC64_CLMUL
# define BUILDING_CRC_CLMUL 64
# include "crc_x86_clmul.h"
#endif

18
src/liblzma/check/crc_x86_clmul.h
View File

@ -14,10 +14,8 @@
/// (URLs were checked on 2023-10-14).
///
/// While this file has both CRC32 and CRC64 implementations, only one
/// should be built at a time to ensure that crc_simd_body() is inlined
/// even with compilers with which lzma_always_inline expands to plain inline.
/// The version to build is selected by defining BUILDING_CRC32_CLMUL or
/// BUILDING_CRC64_CLMUL before including this file.
/// can be built at a time. The version to build is selected by defining
/// BUILDING_CRC_CLMUL to 32 or 64 before including this file.
///
/// FIXME: Builds for 32-bit x86 use the assembly .S files by default
/// unless configured with --disable-assembler. Even then the lookup table
@ -37,6 +35,10 @@
#endif
#define LZMA_CRC_X86_CLMUL_H
#if BUILDING_CRC_CLMUL != 32 && BUILDING_CRC_CLMUL != 64
# error BUILDING_CRC_CLMUL is undefined or has an invalid value
#endif
#include <immintrin.h>
#if defined(_MSC_VER)
@ -211,7 +213,7 @@ crc_simd_body(const uint8_t *buf, const size_t size, __m128i *v0, __m128i *v1,
// x86 CLMUL CRC32 //
/////////////////////
#ifdef BUILDING_CRC32_CLMUL
#if BUILDING_CRC_CLMUL == 32
crc_attr_target
static uint32_t
@ -239,14 +241,14 @@ crc32_arch_optimized(const uint8_t *buf, size_t size, uint32_t crc)
v0 = _mm_xor_si128(v0, v1);
return ~(uint32_t)_mm_extract_epi32(v0, 2);
}
#endif // BUILDING_CRC32_CLMUL
#endif // BUILDING_CRC_CLMUL == 32
/////////////////////
// x86 CLMUL CRC64 //
/////////////////////
#ifdef BUILDING_CRC64_CLMUL
#if BUILDING_CRC_CLMUL == 64
// MSVC (VS2015 - VS2022) produces bad 32-bit x86 code from the CLMUL CRC
// code when optimizations are enabled (release build). According to the bug
@ -309,7 +311,7 @@ crc64_arch_optimized(const uint8_t *buf, size_t size, uint64_t crc)
# pragma optimize("", on)
#endif
#endif // BUILDING_CRC64_CLMUL
#endif // BUILDING_CRC_CLMUL == 64
// Inlining this function duplicates the function body in crc32_resolve() and