diff options
| author | Yann Collet <Cyan4973@users.noreply.github.com> | 2022-01-27 20:08:27 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-01-27 20:08:27 (GMT) |
| commit | 5cc311893f1c94fe37e4151170d5a810c51c3330 (patch) | |
| tree | 4df2fb8704755cd4b63896fc90028f842776dab0 | |
| parent | 4c9431e9af596af0556e5da0ae99305bafb2b10b (diff) | |
| parent | c2d00cb97b68cdaf3cc52dc910eecbeb4bee5015 (diff) | |
| download | lz4-5cc311893f1c94fe37e4151170d5a810c51c3330.zip lz4-5cc311893f1c94fe37e4151170d5a810c51c3330.tar.gz lz4-5cc311893f1c94fe37e4151170d5a810c51c3330.tar.bz2 | |
Merge pull request #1054 from mcfi/patch-1
Disable _tzcnt_u64 for ARM64EC
| -rw-r--r-- | lib/lz4.c | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -517,7 +517,12 @@ static unsigned LZ4_NbCommonBytes (reg_t val) assert(val != 0); if (LZ4_isLittleEndian()) { if (sizeof(val) == 8) { -# if defined(_MSC_VER) && (_MSC_VER >= 1800) && defined(_M_AMD64) && !defined(LZ4_FORCE_SW_BITCOUNT) +# if defined(_MSC_VER) && (_MSC_VER >= 1800) && (defined(_M_AMD64) && !defined(_M_ARM64EC)) && !defined(LZ4_FORCE_SW_BITCOUNT) +/*-************************************************************************************************* +* ARM64EC is a Microsoft-designed ARM64 ABI compatible with AMD64 applications on ARM64 Windows 11. +* The ARM64EC ABI does not support AVX/AVX2/AVX512 instructions, nor their relevant intrinsics +* including _tzcnt_u64. Therefore, we need to neuter the _tzcnt_u64 code path for ARM64EC. +****************************************************************************************************/ # if defined(__clang__) && (__clang_major__ < 10) /* Avoid undefined clang-cl intrinics issue. * See https://github.com/lz4/lz4/pull/1017 for details. */ |