* config/rs6000/rs6000.md (movti_string): Use string instructions.

From-SVN: r58781

gcc/ChangeLog

+2002-11-03  David Edelsohn  <edelsohn@gnu.org>
+
+	* config/rs6000/rs6000.md (movti_string): Use string instructions.
+
 2002-11-03  Roger Sayle  <roger@eyesopen.com>
 
 	PR c/7128

gcc/config/rs6000/rs6000.md

@@ -9248,9 +9248,9 @@
    (set_attr "length" "4,16,16,4,16")])
 
 (define_insn "*movti_string"
-  [(set (match_operand:TI 0 "reg_or_mem_operand" "=m,????r,????r")
-	(match_operand:TI 1 "reg_or_mem_operand" "r,r,m"))
-   (clobber (match_scratch:SI 2 "=X,X,X"))]
+  [(set (match_operand:TI 0 "reg_or_mem_operand" "=Q,m,????r,????r,????r")
+	(match_operand:TI 1 "reg_or_mem_operand" "r,r,r,Q,m"))
+   (clobber (match_scratch:SI 2 "=X,X,X,X,X"))]
   "TARGET_STRING && ! TARGET_POWER && ! TARGET_POWERPC64
    && (gpc_reg_operand (operands[0], TImode) || gpc_reg_operand (operands[1], TImode))"
   "*
@@ -9261,9 +9261,10 @@
       abort ();
 
     case 0:
-      return \"{st%U0|stw%U0} %1,%0\;{st|stw} %L1,%L0\;{st|stw} %Y1,%Y0\;{st|stw} %Z1,%Z0\";
-
+      return \"{stsi|stswi} %1,%P0,16\";
     case 1:
+      return \"{st%U0|stw%U0} %1,%0\;{st|stw} %L1,%L0\;{st|stw} %Y1,%Y0\;{st|stw} %Z1,%Z0\";
+    case 2:
       /* Normally copy registers with lowest numbered register copied first.
 	 But copy in the other order if the first register of the output
 	 is the second, third, or fourth register in the input.  */
@@ -9272,7 +9273,13 @@
 	return \"mr %Z0,%Z1\;mr %Y0,%Y1\;mr %L0,%L1\;mr %0,%1\";
       else
 	return \"mr %0,%1\;mr %L0,%L1\;mr %Y0,%Y1\;mr %Z0,%Z1\";
-    case 2:
+    case 3:
+      /* If the address is not used in the output, we can use lsi.  Otherwise,
+	 fall through to generating four loads.  */
+      if (! reg_overlap_mentioned_p (operands[0], operands[1]))
+	return \"{lsi|lswi} %0,%P1,16\";
+      /* ... fall through ...  */
+    case 4:
       /* If the address register is the same as the register for the lowest-
 	 addressed word, load it last.  Similarly for the next two words.
 	 Otherwise load lowest address to highest.  */
@@ -9289,8 +9296,8 @@
 	return \"{l%U1|lwz%U1} %0,%1\;{l|lwz} %L0,%L1\;{l|lwz} %Y0,%Y1\;{l|lwz} %Z0,%Z1\";
     }
 }"
-  [(set_attr "type" "store,*,load")
-   (set_attr "length" "16,16,16")])
+  [(set_attr "type" "store,store,*,load,load")
+   (set_attr "length" "4,16,16,4,16")])
 
 (define_insn "*movti_ppc64"
   [(set (match_operand:TI 0 "nonimmediate_operand" "=r,r,m")