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8005522: use fast-string instructions on x86 for zeroing

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Use 'rep stosb' instead of 'rep stosq' when fast-string operations are available.

Reviewed-by: twisti, roland
This commit is contained in:
Vladimir Kozlov 2013-01-03 15:09:55 -08:00
parent 73d6d417be
commit cfcd28fd9d
10 changed files with 95 additions and 22 deletions
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3
hotspot/src/cpu/x86/vm/assembler_x86.hpp
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@ -832,7 +832,8 @@ private:
// These do register sized moves/scans
void rep_mov();
void rep_set();
void rep_stos();
void rep_stosb();
void repne_scan();
#ifdef _LP64
void repne_scanl();