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allow easy use of GCC vector builtins on x86 (has someone a better idea?)

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Originally committed as revision 1409 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2003-01-07 17:40:41 +00:00
parent 5a508a98e9
commit 52b41d7f70
1 changed files with 25 additions and 0 deletions
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25
configure vendored
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@ -469,6 +469,26 @@ for restrict_keyword in restrict __restrict__ __restrict; do
fi fi
done done
# test gcc version to see if vector builtins can be used
# currently only used on i386 for MMX builtins
cat > $TMPC << EOF
int main(void) {
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
return 0;
#else
#error no vector builtins
#endif
}
EOF
builtin_vector=no
if $cc -o $TMPO $TMPC 2> /dev/null ; then
builtin_vector=yes
if test "$mmx" = "yes" ; then
CFLAGS="$CFLAGS -msse"
fi
fi
if test x"$1" = x"-h" -o x"$1" = x"--help" ; then if test x"$1" = x"-h" -o x"$1" = x"--help" ; then
cat << EOF cat << EOF
@ -522,6 +542,7 @@ echo "CPU $cpu"
echo "Big Endian $bigendian" echo "Big Endian $bigendian"
if test $cpu = "x86"; then if test $cpu = "x86"; then
echo "MMX enabled $mmx" echo "MMX enabled $mmx"
echo "Vector Builtins $builtin_vector"
fi fi
if test $cpu = "mips"; then if test $cpu = "mips"; then
echo "MMI enabled $mmi" echo "MMI enabled $mmi"
@ -583,6 +604,10 @@ if test "$mmx" = "yes" ; then
echo "TARGET_MMX=yes" >> config.mak echo "TARGET_MMX=yes" >> config.mak
echo "#define HAVE_MMX 1" >> $TMPH echo "#define HAVE_MMX 1" >> $TMPH
fi fi
if test "$builtin_vector" = "yes" ; then
echo "TARGET_BUILTIN_VECTOR=yes" >> config.mak
echo "#define HAVE_BUILTIN_VECTOR 1" >> $TMPH
fi
if test "$mmi" = "yes" ; then if test "$mmi" = "yes" ; then
echo "TARGET_MMI=yes" >> config.mak echo "TARGET_MMI=yes" >> config.mak
echo "#define HAVE_MMI 1" >> $TMPH echo "#define HAVE_MMI 1" >> $TMPH