diff options
| -rw-r--r-- | src/liblzma/common/memcmplen.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/liblzma/common/memcmplen.h b/src/liblzma/common/memcmplen.h index db3fff60..4392c1cf 100644 --- a/src/liblzma/common/memcmplen.h +++ b/src/liblzma/common/memcmplen.h @@ -69,11 +69,13 @@ lzma_memcmplen(const uint8_t *buf1, const uint8_t *buf2, while (len < limit) { const uint64_t x = read64ne(buf1 + len) - read64ne(buf2 + len); if (x != 0) { -# if defined(_M_X64) // MSVC or Intel C compiler on Windows + // MSVC or Intel C compiler on Windows +# if defined(_M_X64) && defined(_MSC_VER) unsigned long tmp; _BitScanForward64(&tmp, x); len += (uint32_t)tmp >> 3; -# else // GCC, clang, or Intel C compiler + // GCC, clang, or Intel C compiler +# else len += (uint32_t)__builtin_ctzll(x) >> 3; # endif return my_min(len, limit); |