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diff src/cpu/x86/vm/macroAssembler_x86.hpp @ 7474:00af3a3a8df4

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8005522: use fast-string instructions on x86 for zeroing Summary: use 'rep stosb' instead of 'rep stosq' when fast-string operations are available. Reviewed-by: twisti, roland
author kvn
date Thu, 03 Jan 2013 15:09:55 -0800
parents 18d56ca3e901
children 038dd2875b94
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line diff
--- a/src/cpu/x86/vm/macroAssembler_x86.hpp	Sun Dec 23 17:08:22 2012 +0100
+++ b/src/cpu/x86/vm/macroAssembler_x86.hpp	Thu Jan 03 15:09:55 2013 -0800
@@ -1096,6 +1096,9 @@
   // C2 compiled method's prolog code.
   void verified_entry(int framesize, bool stack_bang, bool fp_mode_24b);
 
+  // clear memory of size 'cnt' qwords, starting at 'base'.
+  void clear_mem(Register base, Register cnt, Register rtmp);
+
   // IndexOf strings.
   // Small strings are loaded through stack if they cross page boundary.
   void string_indexof(Register str1, Register str2,