[PATCH] D138832: [llvm-exegesis][x86] Add option to prevent use of xmm8-xmm15 upper SSE registers

Thorsten via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Nov 28 10:02:52 PST 2022


tschuett added inline comments.


================
Comment at: llvm/docs/CommandGuide/llvm-exegesis.rst:209
+
+  Using the upper xmm regsiters (xmm8-xmm15) forces a longer instruction encoding
+  which may put greater pressure on the frontend instruct fetch and decode stages,
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registers


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D138832/new/

https://reviews.llvm.org/D138832



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