i386.md (*zero_extendqihi2_movzbw): Avoid partial register stalls by zero…

i386.md (*zero_extendqihi2_movzbw): Avoid partial register stalls by zero extending to the full register.

2005-11-26  Eric Christopher  <echristo@apple.com>

	* config/i386/i386.md (*zero_extendqihi2_movzbw): Avoid partial
	register stalls by zero extending to the full register.

From-SVN: r107559

gcc/ChangeLog

+2005-11-26  Eric Christopher  <echristo@apple.com>
+
+	* config/i386/i386.md (*zero_extendqihi2_movzbw): Avoid partial
+	register stalls by zero extending to the full register.
+
 2005-11-27  Joseph S. Myers  <joseph@codesourcery.com>
 
 	* config/floatunsisf.c, config/floatunsidf.c,

gcc/config/i386/i386.md

@@ -3036,13 +3036,14 @@
   [(set_attr "type" "imovx,alu1")
    (set_attr "mode" "HI")])
 
-(define_insn "*zero_extendqihi2_movzbw"
+; zero extend to SImode here to avoid partial register stalls
+(define_insn "*zero_extendqihi2_movzbl"
   [(set (match_operand:HI 0 "register_operand" "=r")
      (zero_extend:HI (match_operand:QI 1 "nonimmediate_operand" "qm")))]
   "(!TARGET_ZERO_EXTEND_WITH_AND || optimize_size) && reload_completed"
-  "movz{bw|x}\t{%1, %0|%0, %1}"
+  "movz{bl|x}\t{%1, %k0|%k0, %k1}"
   [(set_attr "type" "imovx")
-   (set_attr "mode" "HI")])
+   (set_attr "mode" "SI")])
 
 ;; For the movzbw case strip only the clobber
 (define_split