[all-commits] [llvm/llvm-project] bcbffd: [AMDGPU] Split Dpp8FI and Dpp16FI operands (#82379)

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bcbffd99c48ed0cabd1b94e9ff252680f0968fc3
      https://github.com/llvm/llvm-project/commit/bcbffd99c48ed0cabd1b94e9ff252680f0968fc3
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2024-02-22 (Thu, 22 Feb 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp
    M llvm/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.h
    M llvm/lib/Target/AMDGPU/SIInstrInfo.td
    M llvm/lib/Target/AMDGPU/VOP1Instructions.td
    M llvm/lib/Target/AMDGPU/VOP2Instructions.td
    M llvm/lib/Target/AMDGPU/VOP3Instructions.td
    M llvm/lib/Target/AMDGPU/VOP3PInstructions.td
    M llvm/lib/Target/AMDGPU/VOPCInstructions.td

  Log Message:
  -----------
  [AMDGPU] Split Dpp8FI and Dpp16FI operands (#82379)

Split Dpp8FI and Dpp16FI into two different operands sharing an
AsmOperandClass. They are parsed and rendered identically as fi:1 but
the encoding is different: for DPP16 FI is a single bit, but for DPP8 it
uses two different special values in the src0 field. Having a dedicated
decoder for Dpp8FI allows it to reject other (non-special) src0 values
so that AMDGPUDisassembler::getInstruction no longer needs to call
isValidDPP8 to do post hoc validation of decoded DPP8 instructions.



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