[all-commits] [llvm/llvm-project] f9b120: [X86][Atom] Fix vector integer multiplication reso...
Simon Pilgrim via All-commits
all-commits at lists.llvm.org
Sat May 15 06:26:11 PDT 2021
Branch: refs/heads/main
Home: https://github.com/llvm/llvm-project
Commit: f9b1208681f650eed536648e26b0f9266134b628
https://github.com/llvm/llvm-project/commit/f9b1208681f650eed536648e26b0f9266134b628
Author: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: 2021-05-15 (Sat, 15 May 2021)
Changed paths:
M llvm/lib/Target/X86/X86ScheduleAtom.td
M llvm/test/tools/llvm-mca/X86/Atom/resources-mmx.s
M llvm/test/tools/llvm-mca/X86/Atom/resources-sse1.s
M llvm/test/tools/llvm-mca/X86/Atom/resources-sse2.s
M llvm/test/tools/llvm-mca/X86/Atom/resources-ssse3.s
Log Message:
-----------
[X86][Atom] Fix vector integer multiplication resource/throughputs
Match whats documented in the Intel AOM (and Agner/instlatx64 agree) - vector integer multiplies are pipelined - all Port0, throughput = 2 @ 128bits, 1 @ 64bits.
Noticed while checking reduction costs - now that we can use in-order models in llvm-mca, the atom model is the "worst case scenario" we have in x86.
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