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diff src/cpu/x86/vm/assembler_x86.cpp @ 1914:ae065c367d93

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6987135: Performance regression on Intel platform with 32-bits edition between 6u13 and 6u14. Summary: Use hardware DIV instruction for long division by constant when it is faster than code with multiply. Reviewed-by: never
author kvn
date Tue, 02 Nov 2010 09:00:37 -0700
parents d55217dc206f
children 2fe998383789
line wrap: on
line diff
--- a/src/cpu/x86/vm/assembler_x86.cpp	Sat Oct 30 13:08:23 2010 -0700
+++ b/src/cpu/x86/vm/assembler_x86.cpp	Tue Nov 02 09:00:37 2010 -0700
@@ -1288,7 +1288,7 @@
   if (is8bit(value)) {
     emit_byte(0x6B);
     emit_byte(0xC0 | encode);
-    emit_byte(value);
+    emit_byte(value & 0xFF);
   } else {
     emit_byte(0x69);
     emit_byte(0xC0 | encode);
@@ -3903,7 +3903,7 @@
   if (is8bit(value)) {
     emit_byte(0x6B);
     emit_byte(0xC0 | encode);
-    emit_byte(value);
+    emit_byte(value & 0xFF);
   } else {
     emit_byte(0x69);
     emit_byte(0xC0 | encode);