PPC970 patch + cpu-specific tuning support by (Romain Dolbeau <dolbeau at irisa dot fr>)

Originally committed as revision 1997 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 58 insertions, 1 deletions

diff --git a/configure b/configure
index 787bf38e5b..a92137ec7b 100755
--- a/configure
+++ b/configure
@@ -26,6 +26,7 @@ ranlib="ranlib"
 make="make"
 strip="strip"
 cpu=`uname -m`
+tune="generic"
 mmx="default"
 altivec="default"
 mmi="default"
@@ -272,6 +273,8 @@ for opt do
   ;;
   --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
   ;;
+  --tune=*) tune=`echo $opt | cut -d '=' -f 2`
+  ;;
   --disable-mmx) mmx="no"
   ;;
   --disable-altivec) altivec="no"
@@ -351,6 +354,58 @@ if test $altivec = "default"; then
     fi
 fi
 
+# Add processor-specific flags
+TUNECPU="generic"
+if test $tune != "generic"; then
+    case $tune in
+	601|ppc601|PowerPC601)
+	    CFLAGS="$CFLAGS -mcpu=601"
+	    if test $altivec = "yes"; then
+		echo "WARNING: tuning for PPC601 but altivec enabled !";
+	    fi
+	    TUNECPU=ppc601
+	;;
+	603*|ppc603*|PowerPC603*)
+	    CFLAGS="$CFLAGS -mcpu=603"
+	    if test $altivec = "yes"; then
+		echo "WARNING: tuning for PPC603 but altivec enabled !";
+	    fi
+	    TUNECPU=ppc603
+	;;
+	604*|ppc604*|PowerPC604*)
+	    CFLAGS="$CFLAGS -mcpu=604"
+	    if test $altivec = "yes"; then
+		echo "WARNING: tuning for PPC604 but altivec enabled !";
+	    fi
+	    TUNECPU=ppc604
+	;;
+	G3|75*|ppc75*|PowerPC75*)
+	    CFLAGS="$CFLAGS -mcpu=750"
+	    if test $altivec = "yes"; then
+		echo "WARNING: tuning for PPC75x but altivec enabled !";
+	    fi
+	    TUNECPU=ppc750
+	;;
+	G4|74*|ppc74*|PowerPC74*)
+	    CFLAGS="$CFLAGS -mcpu=7400"
+	    if test $altivec = "no"; then
+		echo "WARNING: tuning for PPC74xx but altivec disabled !";
+	    fi
+	    TUNECPU=ppc7400
+	;;
+	G5|970|ppc970|PowerPC970|power4*|Power4*)
+	    CFLAGS="$CFLAGS -mcpu=970 -mtune=970 -mpowerpc64 -force_cpusubtype_ALL "
+	    if test $altivec = "no"; then
+		echo "WARNING: tuning for PPC970 but altivec disabled !";
+	    fi
+	    TUNECPU=ppc970
+	;;
+	*)
+	echo "WARNING: unknown CPU "$tune", ignored"
+	;;
+    esac
+fi
+
 # See if we have <altivec.h>
 cat > $TMPC << EOF
 #include <altivec.h>
@@ -686,6 +741,7 @@ echo "  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]"
 echo "  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]"
 echo "  --extra-libs=ELIBS       add ELIBS [$ELIBS]"
 echo "  --cpu=CPU                force cpu to CPU  [$cpu]"
+echo "  --tune=PROCESSOR         tune code for a particular CPU (may fails or misperforms on other CPUs)"
 echo "  --disable-mmx            disable mmx usage"
 echo "  --disable-altivec        disable AltiVec usage"
 echo "  --disable-audio-oss      disable OSS audio support [default=no]"
@@ -712,7 +768,7 @@ echo "Install prefix   $prefix"
 echo "Source path      $source_path"
 echo "C compiler       $cc"
 echo "make             $make"
-echo "CPU              $cpu"
+echo "CPU              $cpu ($tune)"
 echo "Big Endian       $bigendian"
 if test $cpu = "x86"; then
 echo "MMX enabled      $mmx"
@@ -792,6 +848,7 @@ elif test "$cpu" = "mips" ; then
   echo "TARGET_ARCH_MIPS=yes" >> config.mak
   echo "#define ARCH_MIPS 1" >> $TMPH
 fi
+echo "#define TUNECPU $TUNECPU" >> $TMPH
 if test "$bigendian" = "yes" ; then
   echo "WORDS_BIGENDIAN=yes" >> config.mak
   echo "#define WORDS_BIGENDIAN 1" >> $TMPH