added sse2 detection for optmath.h

1 files changed, 149 insertions, 0 deletions

diff --git a/acinclude.m4 b/acinclude.m4
new file mode 100644
index 00000000..ef47c978
--- /dev/null
+++ b/acinclude.m4
@@ -0,0 +1,149 @@
+# ===========================================================================
+#        http://autoconf-archive.cryp.to/ax_check_compiler_flags.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_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_$1), [
+      ax_save_FLAGS=$[]_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_$1)=no)
+      _AC_LANG_PREFIX[]FLAGS=$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_$1)=no)
+   _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])
+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], :)
+else
+        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://autoconf-archive.cryp.to/ax_ext.html
+# ===========================================================================
+#
+#
+# COPYLEFT
+#
+#   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 $ax_cv_gcc_x86_cpuid_0x00000001 | cut -d ":" -f 4`
+
+
+ AC_CACHE_CHECK([whether sse2 is supported], [ax_have_sse2_ext],
+  [
+    ax_have_sse2_ext=no
+    if test "$((0x$edx>>26&0x01))" = 1; then
+      ax_have_sse2_ext=yes
+    fi
+  ])
+
+  if test "$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
+
+  AC_SUBST(SIMD_FLAGS)
+])
+