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Add AVX2 detection

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This commit is contained in:
Frank Denis 2016-03-17 11:08:36 +01:00
parent 42d906d3e9
commit 7611ea6018
3 changed files with 31 additions and 0 deletions
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13
configure.ac
View File

@ -356,6 +356,19 @@ AS_IF([test "x$EMSCRIPTEN" = "x"],[
[AC_MSG_RESULT(no)])
CFLAGS="$oldcflags"
oldcflags="$CFLAGS"
AX_CHECK_COMPILE_FLAG([-mavx2], [CFLAGS="$CFLAGS -mavx2"])
AC_MSG_CHECKING(for AVX2 instructions set)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC target("avx2")
#include <immintrin.h>
]], [[ __m256i x = _mm256_abs_epi8(_mm256_setzero_si256()); ]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_AVX2INTRIN_H], [1], [AVX2 is available])
AX_CHECK_COMPILE_FLAG([-mavx2], [CFLAGS_AVX="-mavx2"])],
[AC_MSG_RESULT(no)])
CFLAGS="$oldcflags"
oldcflags="$CFLAGS"
AX_CHECK_COMPILE_FLAG([-maes], [CFLAGS="$CFLAGS -maes"])
AX_CHECK_COMPILE_FLAG([-mpclmul], [CFLAGS="$CFLAGS -mpclmul"])

3
src/libsodium/include/sodium/runtime.h
View File

@ -26,6 +26,9 @@ int sodium_runtime_has_sse41(void);
SODIUM_EXPORT
int sodium_runtime_has_avx(void);
SODIUM_EXPORT
int sodium_runtime_has_avx2(void);
SODIUM_EXPORT
int sodium_runtime_has_pclmul(void);

15
src/libsodium/sodium/runtime.c
View File

@ -15,6 +15,7 @@ typedef struct CPUFeatures_ {
int has_ssse3;
int has_sse41;
int has_avx;
int has_avx2;
int has_pclmul;
int has_aesni;
} CPUFeatures;
@ -26,6 +27,7 @@ static CPUFeatures _cpu_features;
#define CPUIDECX_SSSE3 0x00000200
#define CPUIDECX_SSE41 0x00080000
#define CPUIDECX_AVX 0x10000000
#define CPUIDECX_AVX2 0x00000020
#define CPUIDECX_PCLMUL 0x00000002
#define CPUIDECX_AESNI 0x02000000
#define CPUIDECX_XSAVE 0x04000000
@ -159,6 +161,14 @@ _sodium_runtime_intel_cpu_features(CPUFeatures * const cpu_features)
}
#endif
cpu_features->has_avx2 = 0;
#if defined(HAVE_AVX2INTRIN_H) || \
(defined(_MSC_VER) && (defined(_M_X64) || defined(_M_AMD64) || defined(_M_IX86)))
if (cpu_features->has_avx) {
cpu_features->has_avx2 = ((cpu_info[2] & CPUIDECX_AVX2) != 0x0);
}
#endif
#if defined(HAVE_WMMINTRIN_H) || \
(defined(_MSC_VER) && (defined(_M_X64) || defined(_M_AMD64) || defined(_M_IX86)))
cpu_features->has_pclmul = ((cpu_info[2] & CPUIDECX_PCLMUL) != 0x0);
@ -213,6 +223,11 @@ sodium_runtime_has_avx(void) {
return _cpu_features.has_avx;
}
int
sodium_runtime_has_avx2(void) {
return _cpu_features.has_avx2;
}
int
sodium_runtime_has_pclmul(void) {
return _cpu_features.has_pclmul;