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Merge pull request #4248 from pps83/dev-bzhi32

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Use _bzhi_u32 for 32-bit builds when building with STATIC_BMI2
This commit is contained in:
Yann Collet
2025-01-18 22:48:24 -08:00
committed by GitHub
parent 167b00495d fcd684b9b4
commit a469e7c083
1 changed files with 7 additions and 2 deletions
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lib/common/bitstream.h
+7 -2
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@@ -159,10 +159,15 @@ MEM_STATIC size_t BIT_initCStream(BIT_CStream_t* bitC,
return 0;
}
FORCE_INLINE_TEMPLATE size_t BIT_getLowerBits(size_t bitContainer, U32 const nbBits)
FORCE_INLINE_TEMPLATE size_t BIT_getLowerBits(BitContainerType bitContainer, U32 const nbBits)
{
#if defined(STATIC_BMI2) && STATIC_BMI2 == 1 && !defined(ZSTD_NO_INTRINSICS)
return _bzhi_u64(bitContainer, nbBits);
# if (defined(__x86_64__) || defined(_M_X64)) && !defined(__ILP32__)
return _bzhi_u64(bitContainer, nbBits);
# else
DEBUG_STATIC_ASSERT(sizeof(bitContainer) == sizeof(U32));
return _bzhi_u32(bitContainer, nbBits);
# endif
#else
assert(nbBits < BIT_MASK_SIZE);
return bitContainer & BIT_mask[nbBits];