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comparison src/cpu/x86/vm/globals_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 a5dd6e3ef9f3
children 12f651e29f6b
comparison
equal deleted inserted replaced
7473:d092d1b31229 7474:00af3a3a8df4
118 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \ 118 "Use SSE2 CVTDQ2PS instruction to convert Integer to Float") \
119 \ 119 \
120 product(bool, UseUnalignedLoadStores, false, \ 120 product(bool, UseUnalignedLoadStores, false, \
121 "Use SSE2 MOVDQU instruction for Arraycopy") \ 121 "Use SSE2 MOVDQU instruction for Arraycopy") \
122 \ 122 \
123 product(bool, UseFastStosb, false, \
124 "Use fast-string operation for zeroing: rep stosb") \
125 \
123 /* assembler */ \ 126 /* assembler */ \
124 product(bool, Use486InstrsOnly, false, \ 127 product(bool, Use486InstrsOnly, false, \
125 "Use 80486 Compliant instruction subset") \ 128 "Use 80486 Compliant instruction subset") \
126 \ 129 \
127 product(bool, UseCountLeadingZerosInstruction, false, \ 130 product(bool, UseCountLeadingZerosInstruction, false, \