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Merge 11bc8e9ef3 into c5e44a0435

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fanquake 2025-04-29 12:04:24 +02:00 • committed by GitHub
commit bc54871699
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4 changed files with 0 additions and 25 deletions
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1
cmake/crc32c.cmake
View file

@ -89,7 +89,6 @@ target_compile_definitions(crc32c PRIVATE
HAVE_BUILTIN_PREFETCH=$<BOOL:${HAVE_BUILTIN_PREFETCH}>
HAVE_MM_PREFETCH=$<BOOL:${HAVE_MM_PREFETCH}>
HAVE_STRONG_GETAUXVAL=$<BOOL:${HAVE_STRONG_GETAUXVAL}>
BYTE_ORDER_BIG_ENDIAN=$<STREQUAL:${CMAKE_CXX_BYTE_ORDER},BIG_ENDIAN>
HAVE_SSE42=$<BOOL:${HAVE_SSE42}>
HAVE_ARM64_CRC32C=$<BOOL:${HAVE_ARM64_CRC32C}>
)

3
src/crc32c/CMakeLists.txt
View file

@ -69,9 +69,6 @@ option(CRC32C_BUILD_BENCHMARKS "Build CRC32C's benchmarks" ON)
option(CRC32C_USE_GLOG "Build CRC32C's tests with Google Logging" ON)
option(CRC32C_INSTALL "Install CRC32C's header and library" ON)
include(TestBigEndian)
test_big_endian(BYTE_ORDER_BIG_ENDIAN)
include(CheckCXXCompilerFlag)
# Used by glog.
check_cxx_compiler_flag(-Wno-deprecated CRC32C_HAVE_NO_DEPRECATED)

3
src/crc32c/src/crc32c_config.h.in
View file

@ -5,9 +5,6 @@
#ifndef CRC32C_CRC32C_CONFIG_H_
#define CRC32C_CRC32C_CONFIG_H_
// Define to 1 if building for a big-endian platform.
#cmakedefine01 BYTE_ORDER_BIG_ENDIAN
// Define to 1 if the compiler has the __builtin_prefetch intrinsic.
#cmakedefine01 HAVE_BUILTIN_PREFETCH

18
src/crc32c/src/crc32c_read_le.h
View file

@ -8,30 +8,18 @@
#include <cstdint>
#include <cstring>
#ifdef CRC32C_HAVE_CONFIG_H
#include "crc32c/crc32c_config.h"
#endif
namespace crc32c {
// Reads a little-endian 32-bit integer from a 32-bit-aligned buffer.
inline uint32_t ReadUint32LE(const uint8_t* buffer) {
#if BYTE_ORDER_BIG_ENDIAN
return ((static_cast<uint32_t>(static_cast<uint8_t>(buffer[0]))) |
(static_cast<uint32_t>(static_cast<uint8_t>(buffer[1])) << 8) |
(static_cast<uint32_t>(static_cast<uint8_t>(buffer[2])) << 16) |
(static_cast<uint32_t>(static_cast<uint8_t>(buffer[3])) << 24));
#else // !BYTE_ORDER_BIG_ENDIAN
uint32_t result;
// This should be optimized to a single instruction.
std::memcpy(&result, buffer, sizeof(result));
return result;
#endif // BYTE_ORDER_BIG_ENDIAN
}
// Reads a little-endian 64-bit integer from a 64-bit-aligned buffer.
inline uint64_t ReadUint64LE(const uint8_t* buffer) {
#if BYTE_ORDER_BIG_ENDIAN
return ((static_cast<uint64_t>(static_cast<uint8_t>(buffer[0]))) |
(static_cast<uint64_t>(static_cast<uint8_t>(buffer[1])) << 8) |
(static_cast<uint64_t>(static_cast<uint8_t>(buffer[2])) << 16) |
@ -40,12 +28,6 @@ inline uint64_t ReadUint64LE(const uint8_t* buffer) {
(static_cast<uint64_t>(static_cast<uint8_t>(buffer[5])) << 40) |
(static_cast<uint64_t>(static_cast<uint8_t>(buffer[6])) << 48) |
(static_cast<uint64_t>(static_cast<uint8_t>(buffer[7])) << 56));
#else // !BYTE_ORDER_BIG_ENDIAN
uint64_t result;
// This should be optimized to a single instruction.
std::memcpy(&result, buffer, sizeof(result));
return result;
#endif // BYTE_ORDER_BIG_ENDIAN
}
} // namespace crc32c