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[X86] AMD Zen 3: same-reg SSE XMM PCMPGT{B,W,D,Q} is a 1-cycle(!) dep-breaking zero...
authorRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 16:54:33 +0000 (19:54 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 17:23:04 +0000 (20:23 +0300)
commitf8f7c765a0e19484981c0d1421cb49477e6cc0bc
treec8815d5097418963b030fb5de86314eb78530f72tree | snapshot
parentd2fb4bfba8913c81db770778f6b3105a43716b83commit | diff
[X86] AMD Zen 3: same-reg SSE XMM PCMPGT{B,W,D,Q} is a 1-cycle(!) dep-breaking zero-idiom

As measured by exegesis, and confirmed by ref docs.
llvm/lib/Target/X86/X86ScheduleZnver3.td diff | blob | history
llvm/test/tools/llvm-mca/X86/Znver3/zero-idioms-sse-xmm.s diff | blob | history
Domain: System / Toolchain;