Jan Hubicka <hubicka@freesoft.cz>

        * i386.md (extendhisi2): Output mov instead of cw instruction for K6
        to improve decoding bandwidth.
        * i386.md (extendhiqi2): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26410 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fec9833..6d5772c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Tue Apr 13 14:29:58 1999  Jan Hubicka <hubicka@freesoft.cz>
+
+       * i386.md (extendhisi2): Output mov instead of cw instruction for K6
+       to improve decoding bandwidth.
+       * i386.md (extendhiqi2): Likewise.
+
 Tue Apr 13 14:26:31 1999  Jan Hubicka <hubicka@freesoft.cz>
 
        * i386.md (movsf_push): Handle memory to memory case too, new splitter.

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 02256d4..93e50f2 100644 (file)
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -2091,7 +2091,8 @@
   "*
 {
   if (REGNO (operands[0]) == 0
-      && REG_P (operands[1]) && REGNO (operands[1]) == 0)
+      && REG_P (operands[1]) && REGNO (operands[1]) == 0
+      && (optimize_size || ix86_cpu != PROCESSOR_K6))
 #ifdef INTEL_SYNTAX
     return \"cwde\";
 #else
@@ -2112,7 +2113,8 @@
   "*
 {
   if (REGNO (operands[0]) == 0
-      && REG_P (operands[1]) && REGNO (operands[1]) == 0)
+      && REG_P (operands[1]) && REGNO (operands[1]) == 0
+      && (optimize_size || ix86_cpu != PROCESSOR_K6))
     return \"cbtw\";
 
 #ifdef INTEL_SYNTAX