Use a function for repeated AltiVec output and condition check.

Originally committed as revision 7749 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1330,48 +1330,40 @@ fi
 # Add processor-specific flags
 POWERPCMODE="32bits"
 if test $cpu != "generic"; then
+    warn_altivec_enabled(){
+        enabled altivec && echo "WARNING: Tuning for $1 but AltiVec enabled.";
+    }
+    warn_altivec_disabled(){
+        disabled altivec && echo "WARNING: Tuning for $1 but AltiVec disabled.";
+    }
     case $cpu in
         601|ppc601|PowerPC601)
             add_cflags "-mcpu=601"
-            if enabled altivec; then
-                echo "WARNING: Tuning for PPC601 but AltiVec enabled.";
-            fi
+            warn_altivec_enabled PPC601
         ;;
         603*|ppc603*|PowerPC603*)
             add_cflags "-mcpu=603"
-            if enabled altivec; then
-                echo "WARNING: Tuning for PPC603 but AltiVec enabled.";
-            fi
+            warn_altivec_enabled PPC603
         ;;
         604*|ppc604*|PowerPC604*)
             add_cflags "-mcpu=604"
-            if enabled altivec; then
-                echo "WARNING: Tuning for PPC604 but AltiVec enabled.";
-            fi
+            warn_altivec_enabled PPC604
         ;;
         G3|g3|75*|ppc75*|PowerPC75*)
             add_cflags "-mcpu=750 -mpowerpc-gfxopt"
-            if enabled altivec; then
-                echo "WARNING: Tuning for PPC75x but AltiVec enabled.";
-            fi
+            warn_altivec_enabled PPC75x
         ;;
         G4|g4|745*|ppc745*|PowerPC745*)
             add_cflags "-mcpu=7450 -mpowerpc-gfxopt"
-            if disabled altivec; then
-                echo "WARNING: Tuning for PPC745x but AltiVec disabled.";
-            fi
+            warn_altivec_disabled PPC745x
         ;;
         74*|ppc74*|PowerPC74*)
             add_cflags "-mcpu=7400 -mpowerpc-gfxopt"
-            if disabled altivec; then
-                echo "WARNING: Tuning for PPC74xx but AltiVec disabled.";
-            fi
+            warn_altivec_disabled PPC74xx
         ;;
         G5|g5|970|ppc970|PowerPC970|power4*|Power4*)
             add_cflags "-mcpu=970 -mpowerpc-gfxopt -mpowerpc64"
-            if disabled altivec; then
-                echo "WARNING: Tuning for PPC970 but AltiVec disabled.";
-            fi
+            warn_altivec_disabled PPC970
             POWERPCMODE="64bits"
         ;;
         # targets that do NOT support conditional mov (cmov)