214 lines
7.2 KiB
Plaintext
214 lines
7.2 KiB
Plaintext
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# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_ext.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_EXT
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#
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# DESCRIPTION
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#
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# Find supported SIMD extensions by requesting cpuid. When an SIMD
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# extension is found, the -m"simdextensionname" is added to SIMD_FLAGS if
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# compilator supports it. For example, if "sse2" is available, then
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# "-msse2" is added to SIMD_FLAGS.
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#
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# This macro calls:
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#
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# AC_SUBST(SIMD_FLAGS)
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#
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# And defines:
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#
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# HAVE_MMX / HAVE_SSE / HAVE_SSE2 / HAVE_SSE3 / HAVE_SSSE3 / HAVE_SSE4.1 / HAVE_SSE4.2 / HAVE_AVX
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#
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# LICENSE
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#
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# Copyright (c) 2007 Christophe Tournayre <turn3r@users.sourceforge.net>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 10
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AC_DEFUN([AX_EXT],
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[
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AC_REQUIRE([AC_CANONICAL_HOST])
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case $host_cpu in
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powerpc*)
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AC_CACHE_CHECK([whether altivec is supported], [ax_cv_have_altivec_ext],
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[
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if test `/usr/sbin/sysctl -a 2>/dev/null| grep -c hw.optional.altivec` != 0; then
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if test `/usr/sbin/sysctl -n hw.optional.altivec` = 1; then
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ax_cv_have_altivec_ext=yes
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fi
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fi
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])
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if test "$ax_cv_have_altivec_ext" = yes; then
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AC_DEFINE(HAVE_ALTIVEC,,[Support Altivec instructions])
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AX_CHECK_COMPILE_FLAG(-faltivec, SIMD_FLAGS="$SIMD_FLAGS -faltivec", [])
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fi
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;;
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i[[3456]]86*|x86_64*)
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AC_REQUIRE([AX_GCC_X86_CPUID])
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AX_GCC_X86_CPUID(0x00000001)
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ecx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 3`
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edx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 4`
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AC_CACHE_CHECK([whether mmx is supported], [ax_cv_have_mmx_ext],
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[
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ax_cv_have_mmx_ext=no
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if test "$((0x$edx>>23&0x01))" = 1; then
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ax_cv_have_mmx_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether sse is supported], [ax_cv_have_sse_ext],
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[
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ax_cv_have_sse_ext=no
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if test "$((0x$edx>>25&0x01))" = 1; then
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ax_cv_have_sse_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether sse2 is supported], [ax_cv_have_sse2_ext],
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[
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ax_cv_have_sse2_ext=no
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if test "$((0x$edx>>26&0x01))" = 1; then
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ax_cv_have_sse2_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether sse3 is supported], [ax_cv_have_sse3_ext],
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[
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ax_cv_have_sse3_ext=no
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if test "$((0x$ecx&0x01))" = 1; then
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ax_cv_have_sse3_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether ssse3 is supported], [ax_cv_have_ssse3_ext],
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[
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ax_cv_have_ssse3_ext=no
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if test "$((0x$ecx>>9&0x01))" = 1; then
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ax_cv_have_ssse3_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether sse4.1 is supported], [ax_cv_have_sse41_ext],
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[
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ax_cv_have_sse41_ext=no
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if test "$((0x$ecx>>19&0x01))" = 1; then
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ax_cv_have_sse41_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether sse4.2 is supported], [ax_cv_have_sse42_ext],
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[
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ax_cv_have_sse42_ext=no
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if test "$((0x$ecx>>20&0x01))" = 1; then
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ax_cv_have_sse42_ext=yes
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fi
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])
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AC_CACHE_CHECK([whether avx is supported], [ax_cv_have_avx_ext],
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[
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ax_cv_have_avx_ext=no
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if test "$((0x$ecx>>28&0x01))" = 1; then
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ax_cv_have_avx_ext=yes
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fi
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])
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if test "$ax_cv_have_mmx_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-mmmx, ax_cv_support_mmx_ext=yes, [])
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if test x"$ax_cv_support_mmx_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -mmmx"
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AC_DEFINE(HAVE_MMX,,[Support mmx instructions])
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else
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AC_MSG_WARN([Your processor supports mmx instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_sse_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-msse, ax_cv_support_sse_ext=yes, [])
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if test x"$ax_cv_support_sse_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -msse"
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AC_DEFINE(HAVE_SSE,,[Support SSE (Streaming SIMD Extensions) instructions])
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else
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AC_MSG_WARN([Your processor supports sse instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_sse2_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-msse2, ax_cv_support_sse2_ext=yes, [])
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if test x"$ax_cv_support_sse2_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -msse2"
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AC_DEFINE(HAVE_SSE2,,[Support SSE2 (Streaming SIMD Extensions 2) instructions])
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else
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AC_MSG_WARN([Your processor supports sse2 instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_sse3_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-msse3, ax_cv_support_sse3_ext=yes, [])
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if test x"$ax_cv_support_sse3_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -msse3"
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AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions])
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else
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AC_MSG_WARN([Your processor supports sse3 instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_ssse3_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-mssse3, ax_cv_support_ssse3_ext=yes, [])
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if test x"$ax_cv_support_ssse3_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -mssse3"
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AC_DEFINE(HAVE_SSSE3,,[Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions])
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else
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AC_MSG_WARN([Your processor supports ssse3 instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_sse41_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-msse4.1, ax_cv_support_sse41_ext=yes, [])
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if test x"$ax_cv_support_sse41_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -msse4.1"
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AC_DEFINE(HAVE_SSE4_1,,[Support SSSE4.1 (Streaming SIMD Extensions 4.1) instructions])
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else
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AC_MSG_WARN([Your processor supports sse4.1 instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_sse42_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-msse4.2, ax_cv_support_sse42_ext=yes, [])
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if test x"$ax_cv_support_sse42_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -msse4.2"
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AC_DEFINE(HAVE_SSE4_2,,[Support SSSE4.2 (Streaming SIMD Extensions 4.2) instructions])
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else
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AC_MSG_WARN([Your processor supports sse4.2 instructions but not your compiler, can you try another compiler?])
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fi
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fi
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if test "$ax_cv_have_avx_ext" = yes; then
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AX_CHECK_COMPILE_FLAG(-mavx, ax_cv_support_avx_ext=yes, [])
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if test x"$ax_cv_support_avx_ext" = x"yes"; then
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SIMD_FLAGS="$SIMD_FLAGS -mavx"
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AC_DEFINE(HAVE_AVX,,[Support AVX (Advanced Vector Extensions) instructions])
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else
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AC_MSG_WARN([Your processor supports avx instructions but not your compiler, can you try another compiler?])
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fi
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fi
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;;
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esac
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AC_SUBST(SIMD_FLAGS)
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])
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