diff options
Diffstat (limited to 'snappy.cc')
| -rw-r--r-- | snappy.cc | 21 |
1 files changed, 0 insertions, 21 deletions
@@ -30,27 +30,6 @@ #include "snappy-sinksource.h" #include "snappy.h" -#if !defined(SNAPPY_HAVE_BMI2) -// __BMI2__ is defined by GCC and Clang. Visual Studio doesn't target BMI2 -// specifically, but it does define __AVX2__ when AVX2 support is available. -// Fortunately, AVX2 was introduced in Haswell, just like BMI2. -// -// BMI2 is not defined as a subset of AVX2 (unlike SSSE3 and AVX above). So, -// GCC and Clang can build code with AVX2 enabled but BMI2 disabled, in which -// case issuing BMI2 instructions results in a compiler error. -#if defined(__BMI2__) || (defined(_MSC_VER) && defined(__AVX2__)) -#define SNAPPY_HAVE_BMI2 1 -#else -#define SNAPPY_HAVE_BMI2 0 -#endif -#endif // !defined(SNAPPY_HAVE_BMI2) - -#if SNAPPY_HAVE_BMI2 -// Please do not replace with <x86intrin.h>. or with headers that assume more -// advanced SSE versions without checking with all the OWNERS. -#include <immintrin.h> -#endif - #include <algorithm> #include <array> #include <cstddef> |