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by gpderetta
1540 days ago
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from the patch: The enhancement applies to string lengths between 1 and 128 bytes long. Support for fast-short REP MOVSB is enumerated by the CPUID feature flag: CPUID
[EAX=7H, ECX=0H).EDX.FAST_SHORT_REP_MOVSB[bit 4] = 1 So there is indeed a CPUID feature flag for fast rep movsb. |
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