diff options
Diffstat (limited to 'src/gallium/drivers/radeon/SIISelLowering.cpp')
| -rw-r--r-- | src/gallium/drivers/radeon/SIISelLowering.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeon/SIISelLowering.cpp b/src/gallium/drivers/radeon/SIISelLowering.cpp index 092c2fa67e2..31876bfd262 100644 --- a/src/gallium/drivers/radeon/SIISelLowering.cpp +++ b/src/gallium/drivers/radeon/SIISelLowering.cpp @@ -129,6 +129,9 @@ MachineBasicBlock * SITargetLowering::EmitInstrWithCustomInserter( case AMDGPU::SI_INTERP_CONST: LowerSI_INTERP_CONST(MI, *BB, I); break; + case AMDGPU::SI_KIL: + LowerSI_KIL(MI, *BB, I, MRI); + break; case AMDGPU::SI_V_CNDLT: LowerSI_V_CNDLT(MI, *BB, I, MRI); break; @@ -193,6 +196,38 @@ void SITargetLowering::LowerSI_INTERP_CONST(MachineInstr *MI, MI->eraseFromParent(); } +void SITargetLowering::LowerSI_KIL(MachineInstr *MI, MachineBasicBlock &BB, + MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const +{ + // Clear this pixel from the exec mask if the operand is negative + BuildMI(BB, I, BB.findDebugLoc(I), TII->get(AMDGPU::V_CMPX_LE_F32_e32), + AMDGPU::VCC) + .addReg(AMDGPU::SREG_LIT_0) + .addOperand(MI->getOperand(0)); + + // If the exec mask is non-zero, skip the next two instructions + BuildMI(BB, I, BB.findDebugLoc(I), TII->get(AMDGPU::S_CBRANCH_EXECNZ)) + .addImm(3) + .addReg(AMDGPU::EXEC); + + // Exec mask is zero: Export to NULL target... + BuildMI(BB, I, BB.findDebugLoc(I), TII->get(AMDGPU::EXP)) + .addImm(0) + .addImm(0x09) // V_008DFC_SQ_EXP_NULL + .addImm(0) + .addImm(1) + .addImm(1) + .addReg(AMDGPU::SREG_LIT_0) + .addReg(AMDGPU::SREG_LIT_0) + .addReg(AMDGPU::SREG_LIT_0) + .addReg(AMDGPU::SREG_LIT_0); + + // ... and terminate wavefront + BuildMI(BB, I, BB.findDebugLoc(I), TII->get(AMDGPU::S_ENDPGM)); + + MI->eraseFromParent(); +} + void SITargetLowering::LowerSI_V_CNDLT(MachineInstr *MI, MachineBasicBlock &BB, MachineBasicBlock::iterator I, MachineRegisterInfo & MRI) const { |