vsx.md (vsx_xxpermdi_<mode>): Handle little endian targets.

2014-02-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/vsx.md (vsx_xxpermdi_<mode>): Handle little
	endian targets.

From-SVN: r207814

gcc/ChangeLog

+2014-02-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
+	* config/rs6000/vsx.md (vsx_xxpermdi_<mode>): Handle little
+	endian targets.
+
 2014-02-15  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/60203

gcc/config/rs6000/vsx.md

@@ -1621,7 +1621,18 @@
 	  op1 = gen_lowpart (V2DImode, op1);
 	}
     }
-  emit_insn (gen (target, op0, op1, perm0, perm1));
+  /* In little endian mode, vsx_xxpermdi2_<mode>_1 will perform a
+     transformation we don't want; it is necessary for
+     rs6000_expand_vec_perm_const_1 but not for this use.  So we
+     prepare for that by reversing the transformation here.  */
+  if (BYTES_BIG_ENDIAN)
+    emit_insn (gen (target, op0, op1, perm0, perm1));
+  else
+    {
+      rtx p0 = GEN_INT (3 - INTVAL (perm1));
+      rtx p1 = GEN_INT (3 - INTVAL (perm0));
+      emit_insn (gen (target, op1, op0, p0, p1));
+    }
   DONE;
 })