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[X86] AMD Zen 3: same-reg AVX XMM VPANDN is a zero-cycle(!) dep-breaking zero-idiom
authorRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 13:19:31 +0000 (16:19 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 17:23:00 +0000 (20:23 +0300)
commit44c2b4fe91de00bce63ea4f0fbe47ce612cae69a
tree392fe4165934cca2931819735aa0c7a35b1b4aa2tree | snapshot
parenta72cacb53f42704e7621b6f9e7fa9b21b49fdf76commit | diff
[X86] AMD Zen 3: same-reg AVX XMM VPANDN is a zero-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-avx-xmm.s diff | blob | history
Domain: System / Toolchain;