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llvm/lib/Target/AMDGPU/SIISelLowering.cpp

Lines changed: 49 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -5182,55 +5182,55 @@ static MachineBasicBlock *lowerWaveReduce(MachineInstr &MI,
51825182
BuildMI(BB, MI, DL, TII->get(BitCountOpc), NumActiveLanes)
51835183
.addReg(ExecMask);
51845184

5185-
switch (Opc) {
5186-
case AMDGPU::S_XOR_B32:
5187-
case AMDGPU::S_XOR_B64: {
5188-
// Performing an XOR operation on a uniform value
5189-
// depends on the parity of the number of active lanes.
5190-
// For even parity, the result will be 0, for odd
5191-
// parity the result will be the same as the input value.
5192-
Register ParityRegister =
5193-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5194-
5195-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5196-
.addReg(NewAccumulator->getOperand(0).getReg())
5197-
.addImm(1)
5198-
.setOperandDead(3); // Dead scc
5199-
if (is32BitOpc) {
5200-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5201-
.addReg(SrcReg)
5202-
.addReg(ParityRegister);
5203-
} else {
5204-
Register DestSub0 =
5205-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5206-
Register DestSub1 =
5207-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5208-
5209-
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5210-
const TargetRegisterClass *SrcSubRC =
5211-
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5212-
5213-
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5214-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5215-
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5216-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5217-
5218-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5219-
.add(Op1L)
5220-
.addReg(ParityRegister);
5221-
5222-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5223-
.add(Op1H)
5224-
.addReg(ParityRegister);
5225-
5226-
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5227-
.addReg(DestSub0)
5228-
.addImm(AMDGPU::sub0)
5229-
.addReg(DestSub1)
5230-
.addImm(AMDGPU::sub1);
5231-
}
5232-
break;
5233-
}
5185+
switch (Opc) {
5186+
case AMDGPU::S_XOR_B32:
5187+
case AMDGPU::S_XOR_B64: {
5188+
// Performing an XOR operation on a uniform value
5189+
// depends on the parity of the number of active lanes.
5190+
// For even parity, the result will be 0, for odd
5191+
// parity the result will be the same as the input value.
5192+
Register ParityRegister =
5193+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5194+
5195+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5196+
.addReg(NewAccumulator->getOperand(0).getReg())
5197+
.addImm(1)
5198+
.setOperandDead(3); // Dead scc
5199+
if (is32BitOpc) {
5200+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5201+
.addReg(SrcReg)
5202+
.addReg(ParityRegister);
5203+
} else {
5204+
Register DestSub0 =
5205+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5206+
Register DestSub1 =
5207+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5208+
5209+
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5210+
const TargetRegisterClass *SrcSubRC =
5211+
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5212+
5213+
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5214+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5215+
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5216+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5217+
5218+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5219+
.add(Op1L)
5220+
.addReg(ParityRegister);
5221+
5222+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5223+
.add(Op1H)
5224+
.addReg(ParityRegister);
5225+
5226+
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5227+
.addReg(DestSub0)
5228+
.addImm(AMDGPU::sub0)
5229+
.addReg(DestSub1)
5230+
.addImm(AMDGPU::sub1);
5231+
}
5232+
break;
5233+
}
52345234
case AMDGPU::S_SUB_I32: {
52355235
Register NegatedVal = MRI.createVirtualRegister(DstRegClass);
52365236

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