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Check for altivec assembly support before trying to use it. :)

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40796
This commit is contained in:
Sam Lantinga 2004-01-29 16:15:12 +00:00
parent ac5cdde4c1
commit fdf58b5852
2 changed files with 28 additions and 7 deletions
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33
configure.in
View file

@ -1723,15 +1723,35 @@ CheckUSBHID()
fi fi
} }
dnl Check for altivec instruction support using gas syntax
CheckAltivec()
{
AC_MSG_CHECKING(for GCC Altivec instruction support)
have_gcc_altivec=no
AC_TRY_COMPILE([
],[
asm volatile ("mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1));
],[
have_gcc_altivec=yes
])
if test x$have_gcc_altivec = xyes; then
CFLAGS="$CFLAGS -DGCC_ALTIVEC"
fi
AC_MSG_RESULT($have_gcc_altivec)
}
case "$target" in case "$target" in
*-*-linux*|*-*-gnu*|*-*-k*bsd*-gnu) *-*-linux*|*-*-gnu*|*-*-k*bsd*-gnu)
case "$target" in case "$target" in
*-*-linux*) ARCH=linux ;; *-*-linux*) ARCH=linux ;;
*-*-kfreebsd*-gnu) ARCH=kfreebsd-gnu ;; *-*-kfreebsd*-gnu) ARCH=kfreebsd-gnu ;;
*-*-knetbsd*-gnu) ARCH=knetbsd-gnu ;; *-*-knetbsd*-gnu) ARCH=knetbsd-gnu ;;
*-*-kopenbsd*-gnu) ARCH=kopenbsd-gnu ;; *-*-kopenbsd*-gnu) ARCH=kopenbsd-gnu ;;
*-*-gnu*) ARCH=gnu ;; # must be last *-*-gnu*) ARCH=gnu ;; # must be last
esac esac
CheckDummyVideo CheckDummyVideo
CheckDiskAudio CheckDiskAudio
CheckDLOPEN CheckDLOPEN
@ -1755,6 +1775,7 @@ case "$target" in
CheckOpenGL CheckOpenGL
CheckInputEvents CheckInputEvents
CheckPTHREAD CheckPTHREAD
CheckAltivec
# Set up files for the main() stub # Set up files for the main() stub
if test "x$video_qtopia" = "xyes"; then if test "x$video_qtopia" = "xyes"; then
SDL_CFLAGS="$SDL_CFLAGS -Dmain=SDL_main" SDL_CFLAGS="$SDL_CFLAGS -Dmain=SDL_main"

2
src/cpuinfo/SDL_cpuinfo.c
View file

@ -236,7 +236,7 @@ static __inline__ int CPU_haveAltiVec()
int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0); int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
if( 0 == error ) if( 0 == error )
altivec = (hasVectorUnit != 0); altivec = (hasVectorUnit != 0);
#elseif defined(USE_SETJMP) && defined(__GNUC__) && defined(__powerpc__) #elif defined(USE_SETJMP) && defined(GCC_ALTIVEC)
void (*handler)(int sig); void (*handler)(int sig);
handler = signal(SIGILL, illegal_instruction); handler = signal(SIGILL, illegal_instruction);
if ( setjmp(jmpbuf) == 0 ) { if ( setjmp(jmpbuf) == 0 ) {