improved sse2 detection

1 files changed, 36 insertions, 186 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index 81aeedfb..64cf8f41 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1,12 +1,24 @@
 # ===========================================================================
-#        http://autoconf-archive.cryp.to/ax_check_compiler_flags.html
+#     http://www.nongnu.org/autoconf-archive/ax_check_compiler_flags.html
 # ===========================================================================
 #
+# SYNOPSIS
+#
+#   AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE])
+#
+# DESCRIPTION
 #
-# COPYLEFT
+#   Check whether the given compiler FLAGS work with the current language's
+#   compiler, or whether they give an error. (Warnings, however, are
+#   ignored.)
 #
-#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-#   Copyright (c) 2008 Matteo Frigo
+#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+#   success/failure.
+#
+# LICENSE
+#
+#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
+#   Copyright (c) 2009 Matteo Frigo
 #
 #   This program is free software: you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the
@@ -21,205 +33,43 @@
 #   You should have received a copy of the GNU General Public License along
 #   with this program. If not, see <http://www.gnu.org/licenses/>.
 #
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
 
 AC_DEFUN([AX_CHECK_COMPILER_FLAGS],
 [AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX
 AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1])
 dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
 AS_LITERAL_IF([$1],
-  [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1), [
+  [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]), [
       ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
       _AC_LANG_PREFIX[]FLAGS="$1"
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
-        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=yes,
-        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=no)
+        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes,
+        AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no)
       _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])],
   [ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS
    _AC_LANG_PREFIX[]FLAGS="$1"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
-     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=yes,
-     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)=no)
+     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes,
+     eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no)
    _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])
-eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_$1)
+eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])
 AC_MSG_RESULT($ax_check_compiler_flags)
 if test "x$ax_check_compiler_flags" = xyes; then
-        m4_default([$2], :)
+	m4_default([$2], :)
 else
-        m4_default([$3], :)
+	m4_default([$3], :)
 fi
 ])dnl AX_CHECK_COMPILER_FLAGS
 
-
-
-# ===========================================================================
-#            http://autoconf-archive.cryp.to/ax_gcc_x86_cpuid.html
-# ===========================================================================
-#
-#
-# COPYLEFT
-#
-#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-#   Copyright (c) 2008 Matteo Frigo
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-
-
-AC_DEFUN([AX_GCC_X86_CPUID],
-[AC_REQUIRE([AC_PROG_CC])
-AC_LANG_PUSH([C])
-AC_CACHE_CHECK(for x86 cpuid $1 output, ax_cv_gcc_x86_cpuid_$1,
- [AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [
-     int op = $1, eax, ebx, ecx, edx;
-     FILE *f;
-     /* 64-bit code is easy */
-     if (sizeof(long) == 8) {
-        __asm__("cpuid"
-                : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
-                : "a" (op));
-     } else {
-        __asm__("pushl %%ebx    \n\t"
-	        "cpuid          \n\t"
-	        "movl %%ebx, %1 \n\t"
-	        "popl %%ebx     \n\t"
-                : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-                : "a" (op));
-     }
-     f = fopen("conftest_cpuid", "w"); if (!f) return 1;
-     fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx);
-     fclose(f);
-     return 0;
-])],
-     [ax_cv_gcc_x86_cpuid_$1=`cat conftest_cpuid`; rm -f conftest_cpuid],
-     [ax_cv_gcc_x86_cpuid_$1=unknown; rm -f conftest_cpuid],
-     [ax_cv_gcc_x86_cpuid_$1=unknown])])
-AC_LANG_POP([C])
-])
-
-
-# ===========================================================================
-#             http://www.nongnu.org/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
-#   (only if compilator support it) (ie : if "sse2" is available "-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
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Christophe Tournayre <turn3r@users.sourceforge.net>
-#
-#   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.
-
-AC_DEFUN([AX_EXT],
-[
-  AC_REQUIRE([AX_GCC_X86_CPUID])
-
-  AX_GCC_X86_CPUID(0x00000001)
-  ecx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 3`
-  edx=`echo $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 4`
-  if test "x$edx" = "xunknown"; then
-    ax_have_mmx_ext=no
-    ax_have_sse_ext=no
-    ax_have_sse_ext=no
-    ax_have_sse2_ext=no
-    ax_have_sse3_ext=no
-    ax_have_ssse3_ext=no
-  else
-
-     AC_CACHE_CHECK([whether mmx is supported], [ax_have_mmx_ext],
-      [
-        ax_have_mmx_ext=no
-        if test "$((0x$edx>>23&0x01))" = 1; then
-          ax_have_mmx_ext=yes
-        fi
-      ])
-
-     AC_CACHE_CHECK([whether sse is supported], [ax_have_sse_ext],
-      [
-        ax_have_sse_ext=no
-        if test "$((0x$edx>>25&0x01))" = 1; then
-          ax_have_sse_ext=yes
-        fi
-      ])
-
-     AC_CACHE_CHECK([whether sse2 is supported], [ax_have_sse2_ext],
-      [
-        ax_have_sse2_ext=no
-        if test "$((0x$edx>>26&0x01))" = 1; then
-          ax_have_sse2_ext=yes
-        fi
-      ])
-
-     AC_CACHE_CHECK([whether sse3 is supported], [ax_have_sse3_ext],
-      [
-        ax_have_sse3_ext=no
-        if test "$((0x$ecx&0x01))" = 1; then
-          ax_have_sse3_ext=yes
-        fi
-      ])
-
-     AC_CACHE_CHECK([whether ssse3 is supported], [ax_have_ssse3_ext],
-      [
-        ax_have_ssse3_ext=no
-        if test "$((0x$ecx>>9&0x01))" = 1; then
-          ax_have_ssse3_ext=yes
-        fi
-      ])
-
-      if test "$ax_have_mmx_ext" = yes; then
-        AC_DEFINE(HAVE_MMX,,[Support mmx instructions])
-        AX_CHECK_COMPILER_FLAGS(-mmmx, SIMD_FLAGS="$SIMD_FLAGS -mmmx", [])
-      fi
-
-      if test "$ax_have_sse_ext" = yes; then
-        AC_DEFINE(HAVE_SSE,,[Support SSE (Streaming SIMD Extensions) instructions])
-        AX_CHECK_COMPILER_FLAGS(-msse, SIMD_FLAGS="$SIMD_FLAGS -msse", [])
-      fi
-
-      if test "$ax_have_sse2_ext" = yes; then
-        AC_DEFINE(HAVE_SSE2,,[Support SSE2 (Streaming SIMD Extensions 2) instructions])
-        AX_CHECK_COMPILER_FLAGS(-msse2, SIMD_FLAGS="$SIMD_FLAGS -msse2", [])
-      fi
-
-      if test "$ax_have_sse3_ext" = yes; then
-        AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions])
-        AX_CHECK_COMPILER_FLAGS(-msse3, SIMD_FLAGS="$SIMD_FLAGS -msse3", [])
-      fi
-
-      if test "$ax_have_ssse3_ext" = yes; then
-        AC_DEFINE(HAVE_SSSE3,,[Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions])
-      fi
-  fi
-
-  AC_SUBST(SIMD_FLAGS)
-])
-