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uops.info Alder Lake-E false dependency on FLAGS for int

Open ValeZAA opened this issue 1 year ago • 0 comments

From https://stackoverflow.com/questions/36510095/inc-instruction-vs-add-1-does-it-matter

Update: the Efficiency cores on Alder Lake are Gracemont, and run inc reg as a single uop, but at only 1/clock, vs. 4/clock for add reg, 1 (https://uops.info/). This may be a false dependency on FLAGS like P4 had; the uops.info tests didn't try adding a dep-breaking instruction.

ValeZAA avatar Jan 03 '25 11:01 ValeZAA