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

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@58781 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1d44953..76d0d44 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+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

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 5af83b8..53c6f8a 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/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")