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llvm/lib/Target/AMDGPU/SIISelLowering.cpp

Lines changed: 49 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -5187,55 +5187,55 @@ static MachineBasicBlock *lowerWaveReduce(MachineInstr &MI,
51875187
BuildMI(BB, MI, DL, TII->get(BitCountOpc), NumActiveLanes)
51885188
.addReg(ExecMask);
51895189

5190-
switch (Opc) {
5191-
case AMDGPU::S_XOR_B32:
5192-
case AMDGPU::S_XOR_B64: {
5193-
// Performing an XOR operation on a uniform value
5194-
// depends on the parity of the number of active lanes.
5195-
// For even parity, the result will be 0, for odd
5196-
// parity the result will be the same as the input value.
5197-
Register ParityRegister =
5198-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5199-
5200-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5201-
.addReg(NewAccumulator->getOperand(0).getReg())
5202-
.addImm(1)
5203-
.setOperandDead(3); // Dead scc
5204-
if (is32BitOpc) {
5205-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5206-
.addReg(SrcReg)
5207-
.addReg(ParityRegister);
5208-
} else {
5209-
Register DestSub0 =
5210-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5211-
Register DestSub1 =
5212-
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5213-
5214-
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5215-
const TargetRegisterClass *SrcSubRC =
5216-
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5217-
5218-
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5219-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5220-
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5221-
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5222-
5223-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5224-
.add(Op1L)
5225-
.addReg(ParityRegister);
5226-
5227-
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5228-
.add(Op1H)
5229-
.addReg(ParityRegister);
5230-
5231-
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5232-
.addReg(DestSub0)
5233-
.addImm(AMDGPU::sub0)
5234-
.addReg(DestSub1)
5235-
.addImm(AMDGPU::sub1);
5236-
}
5237-
break;
5238-
}
5190+
switch (Opc) {
5191+
case AMDGPU::S_XOR_B32:
5192+
case AMDGPU::S_XOR_B64: {
5193+
// Performing an XOR operation on a uniform value
5194+
// depends on the parity of the number of active lanes.
5195+
// For even parity, the result will be 0, for odd
5196+
// parity the result will be the same as the input value.
5197+
Register ParityRegister =
5198+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5199+
5200+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_AND_B32), ParityRegister)
5201+
.addReg(NewAccumulator->getOperand(0).getReg())
5202+
.addImm(1)
5203+
.setOperandDead(3); // Dead scc
5204+
if (is32BitOpc) {
5205+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DstReg)
5206+
.addReg(SrcReg)
5207+
.addReg(ParityRegister);
5208+
} else {
5209+
Register DestSub0 =
5210+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5211+
Register DestSub1 =
5212+
MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
5213+
5214+
const TargetRegisterClass *SrcRC = MRI.getRegClass(SrcReg);
5215+
const TargetRegisterClass *SrcSubRC =
5216+
TRI->getSubRegisterClass(SrcRC, AMDGPU::sub0);
5217+
5218+
MachineOperand Op1L = TII->buildExtractSubRegOrImm(
5219+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub0, SrcSubRC);
5220+
MachineOperand Op1H = TII->buildExtractSubRegOrImm(
5221+
MI, MRI, MI.getOperand(1), SrcRC, AMDGPU::sub1, SrcSubRC);
5222+
5223+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub0)
5224+
.add(Op1L)
5225+
.addReg(ParityRegister);
5226+
5227+
BuildMI(BB, MI, DL, TII->get(AMDGPU::S_MUL_I32), DestSub1)
5228+
.add(Op1H)
5229+
.addReg(ParityRegister);
5230+
5231+
BuildMI(BB, MI, DL, TII->get(TargetOpcode::REG_SEQUENCE), DstReg)
5232+
.addReg(DestSub0)
5233+
.addImm(AMDGPU::sub0)
5234+
.addReg(DestSub1)
5235+
.addImm(AMDGPU::sub1);
5236+
}
5237+
break;
5238+
}
52395239
case AMDGPU::S_SUB_I32: {
52405240
Register NegatedVal = MRI.createVirtualRegister(DstRegClass);
52415241

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