[PATCH] D30868: [X86][MMX] Match MMX fp_to_sint conversions from XMM registers

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.

We currently perform the various fp_to_sint XMM conversion and then transfer to the MMX register (on 32-bit via the stack).

This patch improves support for MOVDQ2Q XMM to MMX transfers and adds the XMM->MMX fp_to_sint direct conversion patterns. The SSE2 specifications are the same for for XMM->XMM and XMM->MMX rounding/exceptions/etc.


Repository:
  rL LLVM

https://reviews.llvm.org/D30868

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86InstrMMX.td
  test/CodeGen/X86/mmx-cvt.ll

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