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liblzma: Tweak #if condition in memcmplen.h. 

Maybe ICC always #defines _MSC_VER on Windows but now
it's very clear which code will get used.

(cherry picked from commit b406828a6d)
This commit is contained in:
Lasse Collin 2023-07-18 13:57:54 +03:00
parent 0c53f52657
commit 5a87d91321
1 changed files with 2 additions and 2 deletions
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4
src/liblzma/common/memcmplen.h
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@ -74,11 +74,11 @@ lzma_memcmplen(const uint8_t *buf1, const uint8_t *buf2,
const uint64_t x = read64ne(buf1 + len) - read64ne(buf2 + len);
if (x != 0) {
// MSVC or Intel C compiler on Windows
# if defined(_M_X64) && defined(_MSC_VER)
# if (defined(_MSC_VER) || defined(__INTEL_COMPILER)) && defined(_M_X64)
unsigned long tmp;
_BitScanForward64(&tmp, x);
len += (uint32_t)tmp >> 3;
// GCC, clang, or Intel C compiler
// GCC, Clang, or Intel C compiler
# else
len += (uint32_t)__builtin_ctzll(x) >> 3;
# endif