110 lines
3.0 KiB
Plaintext
110 lines
3.0 KiB
Plaintext
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# ===========================================================================
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# http://autoconf-archive.cryp.to/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_CFLAGS
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# (only if compilator support it) (ie : if "sse2" is available "-msse2" is
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# added to SIMD_CFLAGS)
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#
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# This macro calls:
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#
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# AC_SUBST(SIMD_CFLAGS)
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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
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#
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# LAST MODIFICATION
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#
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# 2008-04-12
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#
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# COPYLEFT
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#
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# Copyright (c) 2008 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.
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AC_DEFUN([AX_EXT],
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[
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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$ecx>>9&0x01))" = 1; then
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ax_cv_have_ssse3_ext=yes
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fi
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])
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if test "$ax_cv_have_mmx_ext" = yes; then
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AC_DEFINE(HAVE_MMX,,[Support mmx instructions])
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AX_CHECK_COMPILER_FLAGS(-mmmx, SIMD_CFLAGS="$SIMD_CFLAGS -mmmx", [])
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fi
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if test "$ax_cv_have_sse_ext" = yes; then
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AC_DEFINE(HAVE_SSE,,[Support SSE (Streaming SIMD Extensions) instructions])
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AX_CHECK_COMPILER_FLAGS(-msse, SIMD_CFLAGS="$SIMD_CFLAGS -msse", [])
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fi
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if test "$ax_cv_have_sse2_ext" = yes; then
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AC_DEFINE(HAVE_SSE2,,[Support SSE2 (Streaming SIMD Extensions 2) instructions])
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AX_CHECK_COMPILER_FLAGS(-msse2, SIMD_CFLAGS="$SIMD_CFLAGS -msse2", [])
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fi
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if test "$ax_cv_have_sse3_ext" = yes; then
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AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions])
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AX_CHECK_COMPILER_FLAGS(-msse3, SIMD_CFLAGS="$SIMD_CFLAGS -msse3", [])
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fi
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if test "$ax_cv_have_ssse3_ext" = yes; then
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AC_DEFINE(HAVE_SSSE3,,[Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions])
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fi
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AC_SUBST(SIMD_CFLAGS)
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])
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