Request for reviews (S): 8005522: use fast-string instructions on x86 for zeroing
vladimir.kozlov at oracle.com
Wed Dec 26 19:57:00 PST 2012
8005522: use fast-string instructions on x86 for zeroing
New x86 processors enhanced the operation of the REP MOVSB and REP STOSB
instructions. Use 'rep stosb' instead of 'rep stosq' when fast-string
operations are available (cpuid ERMS bit is set).
Ran compiler regression tests on machine which has fast-string
operations with 64- and 32-bit VM.
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