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[X86] AMD Zen 3: same-reg SSE XMM ANDNPD is a 1-cycle(!) dep-breaking zero-idiom
authorRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 11:03:31 +0000 (14:03 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 11:06:24 +0000 (14:06 +0300)
commit38ceb46fb03d10e24b83d2261ad70efd555067a2
tree7e9e2a857e66f241077d98d0b725b28703869474tree | snapshot
parent3221e06e9b8559e8b26a9f4f0a6d1a39c29bc226commit | diff
[X86] AMD Zen 3: same-reg SSE XMM ANDNPD is a 1-cycle(!) dep-breaking zero-idiom

As confirmed by exegesis measurements, and 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;