From cd1d3445e34add252dbac135d12fe59b77fbf70f Mon Sep 17 00:00:00 2001
From: David Edelsohn <edelsohn@gnu.org>
Date: Mon, 4 Nov 2002 03:04:10 +0000
Subject: * config/rs6000/rs6000.md (movti_string): Use string instructions.

From-SVN: r58781
---
 gcc/ChangeLog               |  4 ++++
 gcc/config/rs6000/rs6000.md | 23 +++++++++++++++--------
 2 files changed, 19 insertions(+), 8 deletions(-)

(limited to 'gcc')

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1d44953..76d0d44 100644
--- 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
--- 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")
-- 
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