| # =========================================================================== |
| # http://www.gnu.org/software/autoconf-archive/ax_ext.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_EXT |
| # |
| # DESCRIPTION |
| # |
| # Find supported SIMD extensions by requesting cpuid. When an SIMD |
| # extension is found, the -m"simdextensionname" is added to SIMD_FLAGS if |
| # compiler supports it. For example, if "sse2" is available, then "-msse2" |
| # is added to SIMD_FLAGS. |
| # |
| # This macro calls: |
| # |
| # AC_SUBST(SIMD_FLAGS) |
| # |
| # And defines: |
| # |
| # HAVE_MMX / HAVE_SSE / HAVE_SSE2 / HAVE_SSE3 / HAVE_SSSE3 / HAVE_SSE4.1 / HAVE_SSE4.2 / HAVE_AVX |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2007 Christophe Tournayre <turn3r@users.sourceforge.net> |
| # Copyright (c) 2013 Michael Petch <mpetch@capp-sysware.com> |
| # |
| # Copying and distribution of this file, with or without modification, are |
| # permitted in any medium without royalty provided the copyright notice |
| # and this notice are preserved. This file is offered as-is, without any |
| # warranty. |
| |
| #serial 12 |
| |
| AC_DEFUN([AX_EXT], |
| [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| |
| case $host_cpu in |
| i[[3456]]86*|x86_64*|amd64*) |
| |
| AC_REQUIRE([AX_GCC_X86_CPUID]) |
| AC_REQUIRE([AX_GCC_X86_AVX_XGETBV]) |
| |
| AX_GCC_X86_CPUID(0x00000001) |
| ecx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 3` |
| edx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 4` |
| |
| AC_CACHE_CHECK([whether mmx is supported], [ax_cv_have_mmx_ext], |
| [ |
| ax_cv_have_mmx_ext=no |
| if test "$((0x$edx>>23&0x01))" = 1; then |
| ax_cv_have_mmx_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether sse is supported], [ax_cv_have_sse_ext], |
| [ |
| ax_cv_have_sse_ext=no |
| if test "$((0x$edx>>25&0x01))" = 1; then |
| ax_cv_have_sse_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether sse2 is supported], [ax_cv_have_sse2_ext], |
| [ |
| ax_cv_have_sse2_ext=no |
| if test "$((0x$edx>>26&0x01))" = 1; then |
| ax_cv_have_sse2_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether sse3 is supported], [ax_cv_have_sse3_ext], |
| [ |
| ax_cv_have_sse3_ext=no |
| if test "$((0x$ecx&0x01))" = 1; then |
| ax_cv_have_sse3_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether ssse3 is supported], [ax_cv_have_ssse3_ext], |
| [ |
| ax_cv_have_ssse3_ext=no |
| if test "$((0x$ecx>>9&0x01))" = 1; then |
| ax_cv_have_ssse3_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether sse4.1 is supported], [ax_cv_have_sse41_ext], |
| [ |
| ax_cv_have_sse41_ext=no |
| if test "$((0x$ecx>>19&0x01))" = 1; then |
| ax_cv_have_sse41_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether sse4.2 is supported], [ax_cv_have_sse42_ext], |
| [ |
| ax_cv_have_sse42_ext=no |
| if test "$((0x$ecx>>20&0x01))" = 1; then |
| ax_cv_have_sse42_ext=yes |
| fi |
| ]) |
| |
| AC_CACHE_CHECK([whether avx is supported by processor], [ax_cv_have_avx_cpu_ext], |
| [ |
| ax_cv_have_avx_cpu_ext=no |
| if test "$((0x$ecx>>28&0x01))" = 1; then |
| ax_cv_have_avx_cpu_ext=yes |
| fi |
| ]) |
| |
| if test x"$ax_cv_have_avx_cpu_ext" = x"yes"; then |
| AX_GCC_X86_AVX_XGETBV(0x00000000) |
| |
| xgetbv_eax="0" |
| if test x"$ax_cv_gcc_x86_avx_xgetbv_0x00000000" != x"unknown"; then |
| xgetbv_eax=`echo $ax_cv_gcc_x86_avx_xgetbv_0x00000000 | cut -d ":" -f 1` |
| fi |
| |
| AC_CACHE_CHECK([whether avx is supported by operating system], [ax_cv_have_avx_ext], |
| [ |
| ax_cv_have_avx_ext=no |
| |
| if test "$((0x$ecx>>27&0x01))" = 1; then |
| if test "$((0x$xgetbv_eax&0x6))" = 6; then |
| ax_cv_have_avx_ext=yes |
| fi |
| fi |
| ]) |
| if test x"$ax_cv_have_avx_ext" = x"no"; then |
| AC_MSG_WARN([Your processor supports AVX, but your operating system doesn't]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_mmx_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-mmmx, ax_cv_support_mmx_ext=yes, []) |
| if test x"$ax_cv_support_mmx_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -mmmx" |
| AC_DEFINE(HAVE_MMX,,[Support mmx instructions]) |
| else |
| AC_MSG_WARN([Your processor supports mmx instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_sse_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-msse, ax_cv_support_sse_ext=yes, []) |
| if test x"$ax_cv_support_sse_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse" |
| AC_DEFINE(HAVE_SSE,,[Support SSE (Streaming SIMD Extensions) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports sse instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_sse2_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-msse2, ax_cv_support_sse2_ext=yes, []) |
| if test x"$ax_cv_support_sse2_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse2" |
| AC_DEFINE(HAVE_SSE2,,[Support SSE2 (Streaming SIMD Extensions 2) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports sse2 instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_sse3_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-msse3, ax_cv_support_sse3_ext=yes, []) |
| if test x"$ax_cv_support_sse3_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse3" |
| AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports sse3 instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_ssse3_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-mssse3, ax_cv_support_ssse3_ext=yes, []) |
| if test x"$ax_cv_support_ssse3_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -mssse3" |
| AC_DEFINE(HAVE_SSSE3,,[Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports ssse3 instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_sse41_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-msse4.1, ax_cv_support_sse41_ext=yes, []) |
| if test x"$ax_cv_support_sse41_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse4.1" |
| AC_DEFINE(HAVE_SSE4_1,,[Support SSSE4.1 (Streaming SIMD Extensions 4.1) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports sse4.1 instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_sse42_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-msse4.2, ax_cv_support_sse42_ext=yes, []) |
| if test x"$ax_cv_support_sse42_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -msse4.2" |
| AC_DEFINE(HAVE_SSE4_2,,[Support SSSE4.2 (Streaming SIMD Extensions 4.2) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports sse4.2 instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| if test "$ax_cv_have_avx_ext" = yes; then |
| AX_CHECK_COMPILE_FLAG(-mavx, ax_cv_support_avx_ext=yes, []) |
| if test x"$ax_cv_support_avx_ext" = x"yes"; then |
| SIMD_FLAGS="$SIMD_FLAGS -mavx" |
| AC_DEFINE(HAVE_AVX,,[Support AVX (Advanced Vector Extensions) instructions]) |
| else |
| AC_MSG_WARN([Your processor supports avx instructions but not your compiler, can you try another compiler?]) |
| fi |
| fi |
| |
| ;; |
| esac |
| |
| AC_SUBST(SIMD_FLAGS) |
| ]) |