[all-commits] [llvm/llvm-project] 0b0630: [X86] Fix shuffle comment decoding for vinsertps i...

[Nabeel Omer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0b06301a1d839eb5f73559f6c3daf9049c34f3af
      https://github.com/llvm/llvm-project/commit/0b06301a1d839eb5f73559f6c3daf9049c34f3af
  Author: Nabeel Omer <nabeel.omer at sony.com>
  Date:   2024-11-21 (Thu, 21 Nov 2024)

  Changed paths:
    M llvm/lib/Target/X86/MCTargetDesc/X86InstComments.cpp
    M llvm/lib/Target/X86/MCTargetDesc/X86ShuffleDecode.cpp
    M llvm/lib/Target/X86/MCTargetDesc/X86ShuffleDecode.h
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    A llvm/test/MC/X86/vinsertps_decode.s

  Log Message:
  -----------
  [X86] Fix shuffle comment decoding for vinsertps immediate operand (#117009)

The relevant bit from the Intel SDM for vinsertps semantics:
```
IF (SRC = REG) THEN COUNT_S := imm8[7:6] ELSE COUNT_S := 0
```

This is now taken into account.



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