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Basilisk II and SheepShaver Macintosh emulators
294664b726
This was only an experiment. Improvement was marginal: only +3% on AMD64 (an Athlon 64 3200+). However, it may be interesting to test it on EM64T (e.g. newer P4s) since an older P3/800, hence in 32-bit mode, got a +15% improvement in Speedometer 4 benchmarks. Rationale: lahf/seto sequences avoid load/stores to the stack (push/pop) and it was thus hoped to be faster. Anyhow, SAHF_SETO_PROFITABLE can only be enabled manually at this time. Edit your generated Makefile for testing, but first make sure your CPU supports lahf in 64-bit mode (lahf_lm flag in /proc/cpuinfo). |
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BasiliskII | ||
CVSROOT | ||
SheepShaver |