1357 lines
47 KiB
C++
1357 lines
47 KiB
C++
//===-- R600ISelLowering.cpp - R600 DAG Lowering Implementation -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// \brief Custom DAG lowering for R600
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//
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//===----------------------------------------------------------------------===//
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#include "R600ISelLowering.h"
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#include "R600Defines.h"
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#include "R600InstrInfo.h"
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#include "R600MachineFunctionInfo.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/IR/Argument.h"
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#include "llvm/IR/Function.h"
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using namespace llvm;
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R600TargetLowering::R600TargetLowering(TargetMachine &TM) :
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AMDGPUTargetLowering(TM),
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TII(static_cast<const R600InstrInfo*>(TM.getInstrInfo())) {
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addRegisterClass(MVT::v4f32, &AMDGPU::R600_Reg128RegClass);
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addRegisterClass(MVT::f32, &AMDGPU::R600_Reg32RegClass);
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addRegisterClass(MVT::v4i32, &AMDGPU::R600_Reg128RegClass);
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addRegisterClass(MVT::i32, &AMDGPU::R600_Reg32RegClass);
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computeRegisterProperties();
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setOperationAction(ISD::FADD, MVT::v4f32, Expand);
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setOperationAction(ISD::FMUL, MVT::v4f32, Expand);
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setOperationAction(ISD::FDIV, MVT::v4f32, Expand);
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setOperationAction(ISD::FSUB, MVT::v4f32, Expand);
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setOperationAction(ISD::ADD, MVT::v4i32, Expand);
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setOperationAction(ISD::AND, MVT::v4i32, Expand);
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setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Expand);
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setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Expand);
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setOperationAction(ISD::MUL, MVT::v2i32, Expand);
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setOperationAction(ISD::MUL, MVT::v4i32, Expand);
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setOperationAction(ISD::OR, MVT::v4i32, Expand);
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setOperationAction(ISD::OR, MVT::v2i32, Expand);
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setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Expand);
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setOperationAction(ISD::SHL, MVT::v4i32, Expand);
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setOperationAction(ISD::SHL, MVT::v2i32, Expand);
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setOperationAction(ISD::SRL, MVT::v4i32, Expand);
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setOperationAction(ISD::SRL, MVT::v2i32, Expand);
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setOperationAction(ISD::SRA, MVT::v4i32, Expand);
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setOperationAction(ISD::SRA, MVT::v2i32, Expand);
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setOperationAction(ISD::SUB, MVT::v4i32, Expand);
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setOperationAction(ISD::SUB, MVT::v2i32, Expand);
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setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Expand);
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setOperationAction(ISD::UDIV, MVT::v4i32, Expand);
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setOperationAction(ISD::UREM, MVT::v4i32, Expand);
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setOperationAction(ISD::SETCC, MVT::v4i32, Expand);
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setOperationAction(ISD::XOR, MVT::v4i32, Expand);
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setOperationAction(ISD::XOR, MVT::v2i32, Expand);
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setOperationAction(ISD::BR_CC, MVT::i32, Expand);
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setOperationAction(ISD::BR_CC, MVT::f32, Expand);
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setOperationAction(ISD::FSUB, MVT::f32, Expand);
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setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);
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setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
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setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::i1, Custom);
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setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
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setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
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setOperationAction(ISD::SETCC, MVT::i32, Expand);
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setOperationAction(ISD::SETCC, MVT::f32, Expand);
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setOperationAction(ISD::FP_TO_UINT, MVT::i1, Custom);
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setOperationAction(ISD::SELECT, MVT::i32, Custom);
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setOperationAction(ISD::SELECT, MVT::f32, Custom);
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setOperationAction(ISD::VSELECT, MVT::v4i32, Expand);
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setOperationAction(ISD::VSELECT, MVT::v2i32, Expand);
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// Legalize loads and stores to the private address space.
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setOperationAction(ISD::LOAD, MVT::i32, Custom);
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setOperationAction(ISD::LOAD, MVT::v2i32, Custom);
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setOperationAction(ISD::LOAD, MVT::v4i32, Custom);
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setLoadExtAction(ISD::EXTLOAD, MVT::v4i8, Custom);
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setLoadExtAction(ISD::EXTLOAD, MVT::i8, Custom);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::i8, Custom);
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setLoadExtAction(ISD::ZEXTLOAD, MVT::v4i8, Custom);
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setOperationAction(ISD::STORE, MVT::i8, Custom);
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setOperationAction(ISD::STORE, MVT::i32, Custom);
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setOperationAction(ISD::STORE, MVT::v2i32, Custom);
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setOperationAction(ISD::STORE, MVT::v4i32, Custom);
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setOperationAction(ISD::LOAD, MVT::i32, Custom);
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setOperationAction(ISD::LOAD, MVT::v4i32, Custom);
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setOperationAction(ISD::FrameIndex, MVT::i32, Custom);
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setTargetDAGCombine(ISD::FP_ROUND);
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setTargetDAGCombine(ISD::FP_TO_SINT);
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setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
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setTargetDAGCombine(ISD::SELECT_CC);
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setBooleanContents(ZeroOrNegativeOneBooleanContent);
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setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
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setSchedulingPreference(Sched::VLIW);
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}
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MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
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MachineInstr * MI, MachineBasicBlock * BB) const {
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MachineFunction * MF = BB->getParent();
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MachineRegisterInfo &MRI = MF->getRegInfo();
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MachineBasicBlock::iterator I = *MI;
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switch (MI->getOpcode()) {
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default: return AMDGPUTargetLowering::EmitInstrWithCustomInserter(MI, BB);
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case AMDGPU::CLAMP_R600: {
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MachineInstr *NewMI = TII->buildDefaultInstruction(*BB, I,
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AMDGPU::MOV,
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MI->getOperand(0).getReg(),
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MI->getOperand(1).getReg());
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TII->addFlag(NewMI, 0, MO_FLAG_CLAMP);
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break;
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}
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case AMDGPU::FABS_R600: {
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MachineInstr *NewMI = TII->buildDefaultInstruction(*BB, I,
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AMDGPU::MOV,
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MI->getOperand(0).getReg(),
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MI->getOperand(1).getReg());
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TII->addFlag(NewMI, 0, MO_FLAG_ABS);
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break;
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}
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case AMDGPU::FNEG_R600: {
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MachineInstr *NewMI = TII->buildDefaultInstruction(*BB, I,
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AMDGPU::MOV,
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MI->getOperand(0).getReg(),
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MI->getOperand(1).getReg());
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TII->addFlag(NewMI, 0, MO_FLAG_NEG);
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break;
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}
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case AMDGPU::MASK_WRITE: {
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unsigned maskedRegister = MI->getOperand(0).getReg();
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assert(TargetRegisterInfo::isVirtualRegister(maskedRegister));
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MachineInstr * defInstr = MRI.getVRegDef(maskedRegister);
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TII->addFlag(defInstr, 0, MO_FLAG_MASK);
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break;
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}
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case AMDGPU::MOV_IMM_F32:
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TII->buildMovImm(*BB, I, MI->getOperand(0).getReg(),
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MI->getOperand(1).getFPImm()->getValueAPF()
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.bitcastToAPInt().getZExtValue());
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break;
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case AMDGPU::MOV_IMM_I32:
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TII->buildMovImm(*BB, I, MI->getOperand(0).getReg(),
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MI->getOperand(1).getImm());
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break;
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case AMDGPU::CONST_COPY: {
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MachineInstr *NewMI = TII->buildDefaultInstruction(*BB, MI, AMDGPU::MOV,
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MI->getOperand(0).getReg(), AMDGPU::ALU_CONST);
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TII->setImmOperand(NewMI, R600Operands::SRC0_SEL,
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MI->getOperand(1).getImm());
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break;
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}
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case AMDGPU::RAT_WRITE_CACHELESS_32_eg:
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case AMDGPU::RAT_WRITE_CACHELESS_128_eg: {
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unsigned EOP = (llvm::next(I)->getOpcode() == AMDGPU::RETURN) ? 1 : 0;
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(MI->getOpcode()))
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.addOperand(MI->getOperand(0))
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.addOperand(MI->getOperand(1))
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.addImm(EOP); // Set End of program bit
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break;
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}
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case AMDGPU::TXD: {
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unsigned T0 = MRI.createVirtualRegister(&AMDGPU::R600_Reg128RegClass);
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unsigned T1 = MRI.createVirtualRegister(&AMDGPU::R600_Reg128RegClass);
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MachineOperand &RID = MI->getOperand(4);
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MachineOperand &SID = MI->getOperand(5);
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unsigned TextureId = MI->getOperand(6).getImm();
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unsigned SrcX = 0, SrcY = 1, SrcZ = 2, SrcW = 3;
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unsigned CTX = 1, CTY = 1, CTZ = 1, CTW = 1;
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switch (TextureId) {
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case 5: // Rect
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CTX = CTY = 0;
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break;
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case 6: // Shadow1D
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SrcW = SrcZ;
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break;
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case 7: // Shadow2D
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SrcW = SrcZ;
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break;
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case 8: // ShadowRect
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CTX = CTY = 0;
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SrcW = SrcZ;
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break;
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case 9: // 1DArray
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SrcZ = SrcY;
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CTZ = 0;
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break;
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case 10: // 2DArray
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CTZ = 0;
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break;
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case 11: // Shadow1DArray
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SrcZ = SrcY;
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CTZ = 0;
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break;
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case 12: // Shadow2DArray
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CTZ = 0;
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break;
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}
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::TEX_SET_GRADIENTS_H), T0)
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.addOperand(MI->getOperand(3))
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.addImm(SrcX)
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.addImm(SrcY)
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.addImm(SrcZ)
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.addImm(SrcW)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(1)
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.addImm(2)
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.addImm(3)
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.addOperand(RID)
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.addOperand(SID)
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.addImm(CTX)
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.addImm(CTY)
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.addImm(CTZ)
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.addImm(CTW);
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::TEX_SET_GRADIENTS_V), T1)
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.addOperand(MI->getOperand(2))
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.addImm(SrcX)
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.addImm(SrcY)
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.addImm(SrcZ)
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.addImm(SrcW)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(1)
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.addImm(2)
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.addImm(3)
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.addOperand(RID)
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.addOperand(SID)
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.addImm(CTX)
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.addImm(CTY)
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.addImm(CTZ)
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.addImm(CTW);
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::TEX_SAMPLE_G))
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.addOperand(MI->getOperand(0))
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.addOperand(MI->getOperand(1))
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.addImm(SrcX)
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.addImm(SrcY)
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.addImm(SrcZ)
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.addImm(SrcW)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(1)
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.addImm(2)
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.addImm(3)
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.addOperand(RID)
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.addOperand(SID)
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.addImm(CTX)
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.addImm(CTY)
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.addImm(CTZ)
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.addImm(CTW)
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.addReg(T0, RegState::Implicit)
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.addReg(T1, RegState::Implicit);
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break;
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}
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case AMDGPU::TXD_SHADOW: {
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unsigned T0 = MRI.createVirtualRegister(&AMDGPU::R600_Reg128RegClass);
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unsigned T1 = MRI.createVirtualRegister(&AMDGPU::R600_Reg128RegClass);
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MachineOperand &RID = MI->getOperand(4);
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MachineOperand &SID = MI->getOperand(5);
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unsigned TextureId = MI->getOperand(6).getImm();
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unsigned SrcX = 0, SrcY = 1, SrcZ = 2, SrcW = 3;
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unsigned CTX = 1, CTY = 1, CTZ = 1, CTW = 1;
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switch (TextureId) {
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case 5: // Rect
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CTX = CTY = 0;
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break;
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case 6: // Shadow1D
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SrcW = SrcZ;
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break;
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case 7: // Shadow2D
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SrcW = SrcZ;
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break;
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case 8: // ShadowRect
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CTX = CTY = 0;
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SrcW = SrcZ;
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break;
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case 9: // 1DArray
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SrcZ = SrcY;
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CTZ = 0;
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break;
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case 10: // 2DArray
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CTZ = 0;
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break;
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case 11: // Shadow1DArray
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SrcZ = SrcY;
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CTZ = 0;
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break;
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case 12: // Shadow2DArray
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CTZ = 0;
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break;
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}
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::TEX_SET_GRADIENTS_H), T0)
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.addOperand(MI->getOperand(3))
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.addImm(SrcX)
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.addImm(SrcY)
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.addImm(SrcZ)
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.addImm(SrcW)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(1)
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.addImm(2)
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.addImm(3)
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.addOperand(RID)
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.addOperand(SID)
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.addImm(CTX)
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.addImm(CTY)
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.addImm(CTZ)
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.addImm(CTW);
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::TEX_SET_GRADIENTS_V), T1)
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.addOperand(MI->getOperand(2))
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.addImm(SrcX)
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.addImm(SrcY)
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.addImm(SrcZ)
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.addImm(SrcW)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(1)
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.addImm(2)
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.addImm(3)
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.addOperand(RID)
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.addOperand(SID)
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.addImm(CTX)
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.addImm(CTY)
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.addImm(CTZ)
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.addImm(CTW);
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::TEX_SAMPLE_C_G))
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.addOperand(MI->getOperand(0))
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.addOperand(MI->getOperand(1))
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.addImm(SrcX)
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.addImm(SrcY)
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.addImm(SrcZ)
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.addImm(SrcW)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(0)
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.addImm(1)
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.addImm(2)
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.addImm(3)
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.addOperand(RID)
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.addOperand(SID)
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.addImm(CTX)
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.addImm(CTY)
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.addImm(CTZ)
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.addImm(CTW)
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.addReg(T0, RegState::Implicit)
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.addReg(T1, RegState::Implicit);
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break;
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}
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case AMDGPU::BRANCH:
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::JUMP))
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.addOperand(MI->getOperand(0));
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break;
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case AMDGPU::BRANCH_COND_f32: {
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MachineInstr *NewMI =
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::PRED_X),
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AMDGPU::PREDICATE_BIT)
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.addOperand(MI->getOperand(1))
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.addImm(OPCODE_IS_NOT_ZERO)
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.addImm(0); // Flags
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TII->addFlag(NewMI, 0, MO_FLAG_PUSH);
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::JUMP_COND))
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.addOperand(MI->getOperand(0))
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.addReg(AMDGPU::PREDICATE_BIT, RegState::Kill);
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break;
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}
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case AMDGPU::BRANCH_COND_i32: {
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MachineInstr *NewMI =
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::PRED_X),
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AMDGPU::PREDICATE_BIT)
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.addOperand(MI->getOperand(1))
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.addImm(OPCODE_IS_NOT_ZERO_INT)
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.addImm(0); // Flags
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TII->addFlag(NewMI, 0, MO_FLAG_PUSH);
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BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDGPU::JUMP_COND))
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.addOperand(MI->getOperand(0))
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.addReg(AMDGPU::PREDICATE_BIT, RegState::Kill);
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break;
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}
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case AMDGPU::EG_ExportSwz:
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case AMDGPU::R600_ExportSwz: {
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// Instruction is left unmodified if its not the last one of its type
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bool isLastInstructionOfItsType = true;
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unsigned InstExportType = MI->getOperand(1).getImm();
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for (MachineBasicBlock::iterator NextExportInst = llvm::next(I),
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EndBlock = BB->end(); NextExportInst != EndBlock;
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NextExportInst = llvm::next(NextExportInst)) {
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if (NextExportInst->getOpcode() == AMDGPU::EG_ExportSwz ||
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NextExportInst->getOpcode() == AMDGPU::R600_ExportSwz) {
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unsigned CurrentInstExportType = NextExportInst->getOperand(1)
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.getImm();
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if (CurrentInstExportType == InstExportType) {
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isLastInstructionOfItsType = false;
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break;
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}
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}
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}
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bool EOP = (llvm::next(I)->getOpcode() == AMDGPU::RETURN)? 1 : 0;
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if (!EOP && !isLastInstructionOfItsType)
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return BB;
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unsigned CfInst = (MI->getOpcode() == AMDGPU::EG_ExportSwz)? 84 : 40;
|
|
BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(MI->getOpcode()))
|
|
.addOperand(MI->getOperand(0))
|
|
.addOperand(MI->getOperand(1))
|
|
.addOperand(MI->getOperand(2))
|
|
.addOperand(MI->getOperand(3))
|
|
.addOperand(MI->getOperand(4))
|
|
.addOperand(MI->getOperand(5))
|
|
.addOperand(MI->getOperand(6))
|
|
.addImm(CfInst)
|
|
.addImm(EOP);
|
|
break;
|
|
}
|
|
case AMDGPU::RETURN: {
|
|
// RETURN instructions must have the live-out registers as implicit uses,
|
|
// otherwise they appear dead.
|
|
R600MachineFunctionInfo *MFI = MF->getInfo<R600MachineFunctionInfo>();
|
|
MachineInstrBuilder MIB(*MF, MI);
|
|
for (unsigned i = 0, e = MFI->LiveOuts.size(); i != e; ++i)
|
|
MIB.addReg(MFI->LiveOuts[i], RegState::Implicit);
|
|
return BB;
|
|
}
|
|
}
|
|
|
|
MI->eraseFromParent();
|
|
return BB;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Custom DAG Lowering Operations
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
using namespace llvm::Intrinsic;
|
|
using namespace llvm::AMDGPUIntrinsic;
|
|
|
|
SDValue R600TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
|
|
switch (Op.getOpcode()) {
|
|
default: return AMDGPUTargetLowering::LowerOperation(Op, DAG);
|
|
case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
|
|
case ISD::SELECT: return LowerSELECT(Op, DAG);
|
|
case ISD::STORE: return LowerSTORE(Op, DAG);
|
|
case ISD::LOAD: return LowerLOAD(Op, DAG);
|
|
case ISD::FrameIndex: return LowerFrameIndex(Op, DAG);
|
|
case ISD::INTRINSIC_VOID: {
|
|
SDValue Chain = Op.getOperand(0);
|
|
unsigned IntrinsicID =
|
|
cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
|
|
switch (IntrinsicID) {
|
|
case AMDGPUIntrinsic::AMDGPU_store_output: {
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
R600MachineFunctionInfo *MFI = MF.getInfo<R600MachineFunctionInfo>();
|
|
int64_t RegIndex = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
|
|
unsigned Reg = AMDGPU::R600_TReg32RegClass.getRegister(RegIndex);
|
|
MFI->LiveOuts.push_back(Reg);
|
|
return DAG.getCopyToReg(Chain, Op.getDebugLoc(), Reg, Op.getOperand(2));
|
|
}
|
|
case AMDGPUIntrinsic::R600_store_swizzle: {
|
|
const SDValue Args[8] = {
|
|
Chain,
|
|
Op.getOperand(2), // Export Value
|
|
Op.getOperand(3), // ArrayBase
|
|
Op.getOperand(4), // Type
|
|
DAG.getConstant(0, MVT::i32), // SWZ_X
|
|
DAG.getConstant(1, MVT::i32), // SWZ_Y
|
|
DAG.getConstant(2, MVT::i32), // SWZ_Z
|
|
DAG.getConstant(3, MVT::i32) // SWZ_W
|
|
};
|
|
return DAG.getNode(AMDGPUISD::EXPORT, Op.getDebugLoc(), Op.getValueType(),
|
|
Args, 8);
|
|
}
|
|
|
|
// default for switch(IntrinsicID)
|
|
default: break;
|
|
}
|
|
// break out of case ISD::INTRINSIC_VOID in switch(Op.getOpcode())
|
|
break;
|
|
}
|
|
case ISD::INTRINSIC_WO_CHAIN: {
|
|
unsigned IntrinsicID =
|
|
cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
|
|
EVT VT = Op.getValueType();
|
|
DebugLoc DL = Op.getDebugLoc();
|
|
switch(IntrinsicID) {
|
|
default: return AMDGPUTargetLowering::LowerOperation(Op, DAG);
|
|
case AMDGPUIntrinsic::R600_load_input: {
|
|
int64_t RegIndex = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
|
|
unsigned Reg = AMDGPU::R600_TReg32RegClass.getRegister(RegIndex);
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineRegisterInfo &MRI = MF.getRegInfo();
|
|
MRI.addLiveIn(Reg);
|
|
return DAG.getCopyFromReg(DAG.getEntryNode(),
|
|
DAG.getEntryNode().getDebugLoc(), Reg, VT);
|
|
}
|
|
|
|
case AMDGPUIntrinsic::R600_interp_input: {
|
|
int slot = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
|
|
int ijb = cast<ConstantSDNode>(Op.getOperand(2))->getSExtValue();
|
|
MachineSDNode *interp;
|
|
if (ijb < 0) {
|
|
interp = DAG.getMachineNode(AMDGPU::INTERP_VEC_LOAD, DL,
|
|
MVT::v4f32, DAG.getTargetConstant(slot / 4 , MVT::i32));
|
|
return DAG.getTargetExtractSubreg(
|
|
TII->getRegisterInfo().getSubRegFromChannel(slot % 4),
|
|
DL, MVT::f32, SDValue(interp, 0));
|
|
}
|
|
|
|
if (slot % 4 < 2)
|
|
interp = DAG.getMachineNode(AMDGPU::INTERP_PAIR_XY, DL,
|
|
MVT::f32, MVT::f32, DAG.getTargetConstant(slot / 4 , MVT::i32),
|
|
CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::R600_TReg32RegClass.getRegister(2 * ijb + 1), MVT::f32),
|
|
CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::R600_TReg32RegClass.getRegister(2 * ijb), MVT::f32));
|
|
else
|
|
interp = DAG.getMachineNode(AMDGPU::INTERP_PAIR_ZW, DL,
|
|
MVT::f32, MVT::f32, DAG.getTargetConstant(slot / 4 , MVT::i32),
|
|
CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::R600_TReg32RegClass.getRegister(2 * ijb + 1), MVT::f32),
|
|
CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::R600_TReg32RegClass.getRegister(2 * ijb), MVT::f32));
|
|
|
|
return SDValue(interp, slot % 2);
|
|
}
|
|
case AMDGPUIntrinsic::R600_tex:
|
|
case AMDGPUIntrinsic::R600_texc:
|
|
case AMDGPUIntrinsic::R600_txl:
|
|
case AMDGPUIntrinsic::R600_txlc:
|
|
case AMDGPUIntrinsic::R600_txb:
|
|
case AMDGPUIntrinsic::R600_txbc:
|
|
case AMDGPUIntrinsic::R600_txf:
|
|
case AMDGPUIntrinsic::R600_txq:
|
|
case AMDGPUIntrinsic::R600_ddx:
|
|
case AMDGPUIntrinsic::R600_ddy: {
|
|
unsigned TextureOp;
|
|
switch (IntrinsicID) {
|
|
case AMDGPUIntrinsic::R600_tex:
|
|
TextureOp = 0;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_texc:
|
|
TextureOp = 1;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_txl:
|
|
TextureOp = 2;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_txlc:
|
|
TextureOp = 3;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_txb:
|
|
TextureOp = 4;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_txbc:
|
|
TextureOp = 5;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_txf:
|
|
TextureOp = 6;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_txq:
|
|
TextureOp = 7;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_ddx:
|
|
TextureOp = 8;
|
|
break;
|
|
case AMDGPUIntrinsic::R600_ddy:
|
|
TextureOp = 9;
|
|
break;
|
|
default:
|
|
llvm_unreachable("Unknow Texture Operation");
|
|
}
|
|
|
|
SDValue TexArgs[19] = {
|
|
DAG.getConstant(TextureOp, MVT::i32),
|
|
Op.getOperand(1),
|
|
DAG.getConstant(0, MVT::i32),
|
|
DAG.getConstant(1, MVT::i32),
|
|
DAG.getConstant(2, MVT::i32),
|
|
DAG.getConstant(3, MVT::i32),
|
|
Op.getOperand(2),
|
|
Op.getOperand(3),
|
|
Op.getOperand(4),
|
|
DAG.getConstant(0, MVT::i32),
|
|
DAG.getConstant(1, MVT::i32),
|
|
DAG.getConstant(2, MVT::i32),
|
|
DAG.getConstant(3, MVT::i32),
|
|
Op.getOperand(5),
|
|
Op.getOperand(6),
|
|
Op.getOperand(7),
|
|
Op.getOperand(8),
|
|
Op.getOperand(9),
|
|
Op.getOperand(10)
|
|
};
|
|
return DAG.getNode(AMDGPUISD::TEXTURE_FETCH, DL, MVT::v4f32, TexArgs, 19);
|
|
}
|
|
case AMDGPUIntrinsic::AMDGPU_dp4: {
|
|
SDValue Args[8] = {
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(1),
|
|
DAG.getConstant(0, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(2),
|
|
DAG.getConstant(0, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(1),
|
|
DAG.getConstant(1, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(2),
|
|
DAG.getConstant(1, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(1),
|
|
DAG.getConstant(2, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(2),
|
|
DAG.getConstant(2, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(1),
|
|
DAG.getConstant(3, MVT::i32)),
|
|
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, Op.getOperand(2),
|
|
DAG.getConstant(3, MVT::i32))
|
|
};
|
|
return DAG.getNode(AMDGPUISD::DOT4, DL, MVT::f32, Args, 8);
|
|
}
|
|
|
|
case r600_read_ngroups_x:
|
|
return LowerImplicitParameter(DAG, VT, DL, 0);
|
|
case r600_read_ngroups_y:
|
|
return LowerImplicitParameter(DAG, VT, DL, 1);
|
|
case r600_read_ngroups_z:
|
|
return LowerImplicitParameter(DAG, VT, DL, 2);
|
|
case r600_read_global_size_x:
|
|
return LowerImplicitParameter(DAG, VT, DL, 3);
|
|
case r600_read_global_size_y:
|
|
return LowerImplicitParameter(DAG, VT, DL, 4);
|
|
case r600_read_global_size_z:
|
|
return LowerImplicitParameter(DAG, VT, DL, 5);
|
|
case r600_read_local_size_x:
|
|
return LowerImplicitParameter(DAG, VT, DL, 6);
|
|
case r600_read_local_size_y:
|
|
return LowerImplicitParameter(DAG, VT, DL, 7);
|
|
case r600_read_local_size_z:
|
|
return LowerImplicitParameter(DAG, VT, DL, 8);
|
|
|
|
case r600_read_tgid_x:
|
|
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::T1_X, VT);
|
|
case r600_read_tgid_y:
|
|
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::T1_Y, VT);
|
|
case r600_read_tgid_z:
|
|
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::T1_Z, VT);
|
|
case r600_read_tidig_x:
|
|
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::T0_X, VT);
|
|
case r600_read_tidig_y:
|
|
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::T0_Y, VT);
|
|
case r600_read_tidig_z:
|
|
return CreateLiveInRegister(DAG, &AMDGPU::R600_TReg32RegClass,
|
|
AMDGPU::T0_Z, VT);
|
|
}
|
|
// break out of case ISD::INTRINSIC_WO_CHAIN in switch(Op.getOpcode())
|
|
break;
|
|
}
|
|
} // end switch(Op.getOpcode())
|
|
return SDValue();
|
|
}
|
|
|
|
void R600TargetLowering::ReplaceNodeResults(SDNode *N,
|
|
SmallVectorImpl<SDValue> &Results,
|
|
SelectionDAG &DAG) const {
|
|
switch (N->getOpcode()) {
|
|
default: return;
|
|
case ISD::FP_TO_UINT: Results.push_back(LowerFPTOUINT(N->getOperand(0), DAG));
|
|
return;
|
|
case ISD::LOAD: {
|
|
SDNode *Node = LowerLOAD(SDValue(N, 0), DAG).getNode();
|
|
Results.push_back(SDValue(Node, 0));
|
|
Results.push_back(SDValue(Node, 1));
|
|
// XXX: LLVM seems not to replace Chain Value inside CustomWidenLowerNode
|
|
// function
|
|
DAG.ReplaceAllUsesOfValueWith(SDValue(N,1), SDValue(Node, 1));
|
|
return;
|
|
}
|
|
case ISD::STORE:
|
|
SDNode *Node = LowerSTORE(SDValue(N, 0), DAG).getNode();
|
|
Results.push_back(SDValue(Node, 0));
|
|
return;
|
|
}
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerFPTOUINT(SDValue Op, SelectionDAG &DAG) const {
|
|
return DAG.getNode(
|
|
ISD::SETCC,
|
|
Op.getDebugLoc(),
|
|
MVT::i1,
|
|
Op, DAG.getConstantFP(0.0f, MVT::f32),
|
|
DAG.getCondCode(ISD::SETNE)
|
|
);
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerImplicitParameter(SelectionDAG &DAG, EVT VT,
|
|
DebugLoc DL,
|
|
unsigned DwordOffset) const {
|
|
unsigned ByteOffset = DwordOffset * 4;
|
|
PointerType * PtrType = PointerType::get(VT.getTypeForEVT(*DAG.getContext()),
|
|
AMDGPUAS::PARAM_I_ADDRESS);
|
|
|
|
// We shouldn't be using an offset wider than 16-bits for implicit parameters.
|
|
assert(isInt<16>(ByteOffset));
|
|
|
|
return DAG.getLoad(VT, DL, DAG.getEntryNode(),
|
|
DAG.getConstant(ByteOffset, MVT::i32), // PTR
|
|
MachinePointerInfo(ConstantPointerNull::get(PtrType)),
|
|
false, false, false, 0);
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const {
|
|
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
const AMDGPUFrameLowering *TFL =
|
|
static_cast<const AMDGPUFrameLowering*>(getTargetMachine().getFrameLowering());
|
|
|
|
FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Op);
|
|
assert(FIN);
|
|
|
|
unsigned FrameIndex = FIN->getIndex();
|
|
unsigned Offset = TFL->getFrameIndexOffset(MF, FrameIndex);
|
|
return DAG.getConstant(Offset * 4 * TFL->getStackWidth(MF), MVT::i32);
|
|
}
|
|
|
|
bool R600TargetLowering::isZero(SDValue Op) const {
|
|
if(ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(Op)) {
|
|
return Cst->isNullValue();
|
|
} else if(ConstantFPSDNode *CstFP = dyn_cast<ConstantFPSDNode>(Op)){
|
|
return CstFP->isZero();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
|
|
DebugLoc DL = Op.getDebugLoc();
|
|
EVT VT = Op.getValueType();
|
|
|
|
SDValue LHS = Op.getOperand(0);
|
|
SDValue RHS = Op.getOperand(1);
|
|
SDValue True = Op.getOperand(2);
|
|
SDValue False = Op.getOperand(3);
|
|
SDValue CC = Op.getOperand(4);
|
|
SDValue Temp;
|
|
|
|
// LHS and RHS are guaranteed to be the same value type
|
|
EVT CompareVT = LHS.getValueType();
|
|
|
|
// Check if we can lower this to a native operation.
|
|
|
|
// Try to lower to a SET* instruction:
|
|
//
|
|
// SET* can match the following patterns:
|
|
//
|
|
// select_cc f32, f32, -1, 0, cc_any
|
|
// select_cc f32, f32, 1.0f, 0.0f, cc_any
|
|
// select_cc i32, i32, -1, 0, cc_any
|
|
//
|
|
|
|
// Move hardware True/False values to the correct operand.
|
|
if (isHWTrueValue(False) && isHWFalseValue(True)) {
|
|
ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
|
|
std::swap(False, True);
|
|
CC = DAG.getCondCode(ISD::getSetCCInverse(CCOpcode, CompareVT == MVT::i32));
|
|
}
|
|
|
|
if (isHWTrueValue(True) && isHWFalseValue(False) &&
|
|
(CompareVT == VT || VT == MVT::i32)) {
|
|
// This can be matched by a SET* instruction.
|
|
return DAG.getNode(ISD::SELECT_CC, DL, VT, LHS, RHS, True, False, CC);
|
|
}
|
|
|
|
// Try to lower to a CND* instruction:
|
|
//
|
|
// CND* can match the following patterns:
|
|
//
|
|
// select_cc f32, 0.0, f32, f32, cc_any
|
|
// select_cc f32, 0.0, i32, i32, cc_any
|
|
// select_cc i32, 0, f32, f32, cc_any
|
|
// select_cc i32, 0, i32, i32, cc_any
|
|
//
|
|
if (isZero(LHS) || isZero(RHS)) {
|
|
SDValue Cond = (isZero(LHS) ? RHS : LHS);
|
|
SDValue Zero = (isZero(LHS) ? LHS : RHS);
|
|
ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
|
|
if (CompareVT != VT) {
|
|
// Bitcast True / False to the correct types. This will end up being
|
|
// a nop, but it allows us to define only a single pattern in the
|
|
// .TD files for each CND* instruction rather than having to have
|
|
// one pattern for integer True/False and one for fp True/False
|
|
True = DAG.getNode(ISD::BITCAST, DL, CompareVT, True);
|
|
False = DAG.getNode(ISD::BITCAST, DL, CompareVT, False);
|
|
}
|
|
if (isZero(LHS)) {
|
|
CCOpcode = ISD::getSetCCSwappedOperands(CCOpcode);
|
|
}
|
|
|
|
switch (CCOpcode) {
|
|
case ISD::SETONE:
|
|
case ISD::SETUNE:
|
|
case ISD::SETNE:
|
|
case ISD::SETULE:
|
|
case ISD::SETULT:
|
|
case ISD::SETOLE:
|
|
case ISD::SETOLT:
|
|
case ISD::SETLE:
|
|
case ISD::SETLT:
|
|
CCOpcode = ISD::getSetCCInverse(CCOpcode, CompareVT == MVT::i32);
|
|
Temp = True;
|
|
True = False;
|
|
False = Temp;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
SDValue SelectNode = DAG.getNode(ISD::SELECT_CC, DL, CompareVT,
|
|
Cond, Zero,
|
|
True, False,
|
|
DAG.getCondCode(CCOpcode));
|
|
return DAG.getNode(ISD::BITCAST, DL, VT, SelectNode);
|
|
}
|
|
|
|
|
|
// Possible Min/Max pattern
|
|
SDValue MinMax = LowerMinMax(Op, DAG);
|
|
if (MinMax.getNode()) {
|
|
return MinMax;
|
|
}
|
|
|
|
// If we make it this for it means we have no native instructions to handle
|
|
// this SELECT_CC, so we must lower it.
|
|
SDValue HWTrue, HWFalse;
|
|
|
|
if (CompareVT == MVT::f32) {
|
|
HWTrue = DAG.getConstantFP(1.0f, CompareVT);
|
|
HWFalse = DAG.getConstantFP(0.0f, CompareVT);
|
|
} else if (CompareVT == MVT::i32) {
|
|
HWTrue = DAG.getConstant(-1, CompareVT);
|
|
HWFalse = DAG.getConstant(0, CompareVT);
|
|
}
|
|
else {
|
|
assert(!"Unhandled value type in LowerSELECT_CC");
|
|
}
|
|
|
|
// Lower this unsupported SELECT_CC into a combination of two supported
|
|
// SELECT_CC operations.
|
|
SDValue Cond = DAG.getNode(ISD::SELECT_CC, DL, CompareVT, LHS, RHS, HWTrue, HWFalse, CC);
|
|
|
|
return DAG.getNode(ISD::SELECT_CC, DL, VT,
|
|
Cond, HWFalse,
|
|
True, False,
|
|
DAG.getCondCode(ISD::SETNE));
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
|
|
return DAG.getNode(ISD::SELECT_CC,
|
|
Op.getDebugLoc(),
|
|
Op.getValueType(),
|
|
Op.getOperand(0),
|
|
DAG.getConstant(0, MVT::i32),
|
|
Op.getOperand(1),
|
|
Op.getOperand(2),
|
|
DAG.getCondCode(ISD::SETNE));
|
|
}
|
|
|
|
/// LLVM generates byte-addresed pointers. For indirect addressing, we need to
|
|
/// convert these pointers to a register index. Each register holds
|
|
/// 16 bytes, (4 x 32bit sub-register), but we need to take into account the
|
|
/// \p StackWidth, which tells us how many of the 4 sub-registrers will be used
|
|
/// for indirect addressing.
|
|
SDValue R600TargetLowering::stackPtrToRegIndex(SDValue Ptr,
|
|
unsigned StackWidth,
|
|
SelectionDAG &DAG) const {
|
|
unsigned SRLPad;
|
|
switch(StackWidth) {
|
|
case 1:
|
|
SRLPad = 2;
|
|
break;
|
|
case 2:
|
|
SRLPad = 3;
|
|
break;
|
|
case 4:
|
|
SRLPad = 4;
|
|
break;
|
|
default: llvm_unreachable("Invalid stack width");
|
|
}
|
|
|
|
return DAG.getNode(ISD::SRL, Ptr.getDebugLoc(), Ptr.getValueType(), Ptr,
|
|
DAG.getConstant(SRLPad, MVT::i32));
|
|
}
|
|
|
|
void R600TargetLowering::getStackAddress(unsigned StackWidth,
|
|
unsigned ElemIdx,
|
|
unsigned &Channel,
|
|
unsigned &PtrIncr) const {
|
|
switch (StackWidth) {
|
|
default:
|
|
case 1:
|
|
Channel = 0;
|
|
if (ElemIdx > 0) {
|
|
PtrIncr = 1;
|
|
} else {
|
|
PtrIncr = 0;
|
|
}
|
|
break;
|
|
case 2:
|
|
Channel = ElemIdx % 2;
|
|
if (ElemIdx == 2) {
|
|
PtrIncr = 1;
|
|
} else {
|
|
PtrIncr = 0;
|
|
}
|
|
break;
|
|
case 4:
|
|
Channel = ElemIdx;
|
|
PtrIncr = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
|
|
DebugLoc DL = Op.getDebugLoc();
|
|
StoreSDNode *StoreNode = cast<StoreSDNode>(Op);
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue Value = Op.getOperand(1);
|
|
SDValue Ptr = Op.getOperand(2);
|
|
|
|
if (StoreNode->getAddressSpace() == AMDGPUAS::GLOBAL_ADDRESS &&
|
|
Ptr->getOpcode() != AMDGPUISD::DWORDADDR) {
|
|
// Convert pointer from byte address to dword address.
|
|
Ptr = DAG.getNode(AMDGPUISD::DWORDADDR, DL, Ptr.getValueType(),
|
|
DAG.getNode(ISD::SRL, DL, Ptr.getValueType(),
|
|
Ptr, DAG.getConstant(2, MVT::i32)));
|
|
|
|
if (StoreNode->isTruncatingStore() || StoreNode->isIndexed()) {
|
|
assert(!"Truncated and indexed stores not supported yet");
|
|
} else {
|
|
Chain = DAG.getStore(Chain, DL, Value, Ptr, StoreNode->getMemOperand());
|
|
}
|
|
return Chain;
|
|
}
|
|
|
|
EVT ValueVT = Value.getValueType();
|
|
|
|
if (StoreNode->getAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS) {
|
|
return SDValue();
|
|
}
|
|
|
|
// Lowering for indirect addressing
|
|
|
|
const MachineFunction &MF = DAG.getMachineFunction();
|
|
const AMDGPUFrameLowering *TFL = static_cast<const AMDGPUFrameLowering*>(
|
|
getTargetMachine().getFrameLowering());
|
|
unsigned StackWidth = TFL->getStackWidth(MF);
|
|
|
|
Ptr = stackPtrToRegIndex(Ptr, StackWidth, DAG);
|
|
|
|
if (ValueVT.isVector()) {
|
|
unsigned NumElemVT = ValueVT.getVectorNumElements();
|
|
EVT ElemVT = ValueVT.getVectorElementType();
|
|
SDValue Stores[4];
|
|
|
|
assert(NumElemVT >= StackWidth && "Stack width cannot be greater than "
|
|
"vector width in load");
|
|
|
|
for (unsigned i = 0; i < NumElemVT; ++i) {
|
|
unsigned Channel, PtrIncr;
|
|
getStackAddress(StackWidth, i, Channel, PtrIncr);
|
|
Ptr = DAG.getNode(ISD::ADD, DL, MVT::i32, Ptr,
|
|
DAG.getConstant(PtrIncr, MVT::i32));
|
|
SDValue Elem = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ElemVT,
|
|
Value, DAG.getConstant(i, MVT::i32));
|
|
|
|
Stores[i] = DAG.getNode(AMDGPUISD::REGISTER_STORE, DL, MVT::Other,
|
|
Chain, Elem, Ptr,
|
|
DAG.getTargetConstant(Channel, MVT::i32));
|
|
}
|
|
Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Stores, NumElemVT);
|
|
} else {
|
|
if (ValueVT == MVT::i8) {
|
|
Value = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, Value);
|
|
}
|
|
Chain = DAG.getNode(AMDGPUISD::REGISTER_STORE, DL, MVT::Other, Chain, Value, Ptr,
|
|
DAG.getTargetConstant(0, MVT::i32)); // Channel
|
|
}
|
|
|
|
return Chain;
|
|
}
|
|
|
|
// return (512 + (kc_bank << 12)
|
|
static int
|
|
ConstantAddressBlock(unsigned AddressSpace) {
|
|
switch (AddressSpace) {
|
|
case AMDGPUAS::CONSTANT_BUFFER_0:
|
|
return 512;
|
|
case AMDGPUAS::CONSTANT_BUFFER_1:
|
|
return 512 + 4096;
|
|
case AMDGPUAS::CONSTANT_BUFFER_2:
|
|
return 512 + 4096 * 2;
|
|
case AMDGPUAS::CONSTANT_BUFFER_3:
|
|
return 512 + 4096 * 3;
|
|
case AMDGPUAS::CONSTANT_BUFFER_4:
|
|
return 512 + 4096 * 4;
|
|
case AMDGPUAS::CONSTANT_BUFFER_5:
|
|
return 512 + 4096 * 5;
|
|
case AMDGPUAS::CONSTANT_BUFFER_6:
|
|
return 512 + 4096 * 6;
|
|
case AMDGPUAS::CONSTANT_BUFFER_7:
|
|
return 512 + 4096 * 7;
|
|
case AMDGPUAS::CONSTANT_BUFFER_8:
|
|
return 512 + 4096 * 8;
|
|
case AMDGPUAS::CONSTANT_BUFFER_9:
|
|
return 512 + 4096 * 9;
|
|
case AMDGPUAS::CONSTANT_BUFFER_10:
|
|
return 512 + 4096 * 10;
|
|
case AMDGPUAS::CONSTANT_BUFFER_11:
|
|
return 512 + 4096 * 11;
|
|
case AMDGPUAS::CONSTANT_BUFFER_12:
|
|
return 512 + 4096 * 12;
|
|
case AMDGPUAS::CONSTANT_BUFFER_13:
|
|
return 512 + 4096 * 13;
|
|
case AMDGPUAS::CONSTANT_BUFFER_14:
|
|
return 512 + 4096 * 14;
|
|
case AMDGPUAS::CONSTANT_BUFFER_15:
|
|
return 512 + 4096 * 15;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
SDValue R600TargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const
|
|
{
|
|
EVT VT = Op.getValueType();
|
|
DebugLoc DL = Op.getDebugLoc();
|
|
LoadSDNode *LoadNode = cast<LoadSDNode>(Op);
|
|
SDValue Chain = Op.getOperand(0);
|
|
SDValue Ptr = Op.getOperand(1);
|
|
SDValue LoweredLoad;
|
|
|
|
int ConstantBlock = ConstantAddressBlock(LoadNode->getAddressSpace());
|
|
if (ConstantBlock > -1) {
|
|
SDValue Result;
|
|
if (dyn_cast<ConstantExpr>(LoadNode->getSrcValue()) ||
|
|
dyn_cast<Constant>(LoadNode->getSrcValue()) ||
|
|
dyn_cast<ConstantSDNode>(Ptr)) {
|
|
SDValue Slots[4];
|
|
for (unsigned i = 0; i < 4; i++) {
|
|
// We want Const position encoded with the following formula :
|
|
// (((512 + (kc_bank << 12) + const_index) << 2) + chan)
|
|
// const_index is Ptr computed by llvm using an alignment of 16.
|
|
// Thus we add (((512 + (kc_bank << 12)) + chan ) * 4 here and
|
|
// then div by 4 at the ISel step
|
|
SDValue NewPtr = DAG.getNode(ISD::ADD, DL, Ptr.getValueType(), Ptr,
|
|
DAG.getConstant(4 * i + ConstantBlock * 16, MVT::i32));
|
|
Slots[i] = DAG.getNode(AMDGPUISD::CONST_ADDRESS, DL, MVT::i32, NewPtr);
|
|
}
|
|
Result = DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v4i32, Slots, 4);
|
|
} else {
|
|
// non constant ptr cant be folded, keeps it as a v4f32 load
|
|
Result = DAG.getNode(AMDGPUISD::CONST_ADDRESS, DL, MVT::v4i32,
|
|
DAG.getNode(ISD::SRL, DL, MVT::i32, Ptr, DAG.getConstant(4, MVT::i32)),
|
|
DAG.getConstant(LoadNode->getAddressSpace() -
|
|
AMDGPUAS::CONSTANT_BUFFER_0, MVT::i32)
|
|
);
|
|
}
|
|
|
|
if (!VT.isVector()) {
|
|
Result = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::i32, Result,
|
|
DAG.getConstant(0, MVT::i32));
|
|
}
|
|
|
|
SDValue MergedValues[2] = {
|
|
Result,
|
|
Chain
|
|
};
|
|
return DAG.getMergeValues(MergedValues, 2, DL);
|
|
}
|
|
|
|
if (LoadNode->getAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS) {
|
|
return SDValue();
|
|
}
|
|
|
|
// Lowering for indirect addressing
|
|
const MachineFunction &MF = DAG.getMachineFunction();
|
|
const AMDGPUFrameLowering *TFL = static_cast<const AMDGPUFrameLowering*>(
|
|
getTargetMachine().getFrameLowering());
|
|
unsigned StackWidth = TFL->getStackWidth(MF);
|
|
|
|
Ptr = stackPtrToRegIndex(Ptr, StackWidth, DAG);
|
|
|
|
if (VT.isVector()) {
|
|
unsigned NumElemVT = VT.getVectorNumElements();
|
|
EVT ElemVT = VT.getVectorElementType();
|
|
SDValue Loads[4];
|
|
|
|
assert(NumElemVT >= StackWidth && "Stack width cannot be greater than "
|
|
"vector width in load");
|
|
|
|
for (unsigned i = 0; i < NumElemVT; ++i) {
|
|
unsigned Channel, PtrIncr;
|
|
getStackAddress(StackWidth, i, Channel, PtrIncr);
|
|
Ptr = DAG.getNode(ISD::ADD, DL, MVT::i32, Ptr,
|
|
DAG.getConstant(PtrIncr, MVT::i32));
|
|
Loads[i] = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, ElemVT,
|
|
Chain, Ptr,
|
|
DAG.getTargetConstant(Channel, MVT::i32),
|
|
Op.getOperand(2));
|
|
}
|
|
for (unsigned i = NumElemVT; i < 4; ++i) {
|
|
Loads[i] = DAG.getUNDEF(ElemVT);
|
|
}
|
|
EVT TargetVT = EVT::getVectorVT(*DAG.getContext(), ElemVT, 4);
|
|
LoweredLoad = DAG.getNode(ISD::BUILD_VECTOR, DL, TargetVT, Loads, 4);
|
|
} else {
|
|
LoweredLoad = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, VT,
|
|
Chain, Ptr,
|
|
DAG.getTargetConstant(0, MVT::i32), // Channel
|
|
Op.getOperand(2));
|
|
}
|
|
|
|
SDValue Ops[2];
|
|
Ops[0] = LoweredLoad;
|
|
Ops[1] = Chain;
|
|
|
|
return DAG.getMergeValues(Ops, 2, DL);
|
|
}
|
|
|
|
/// XXX Only kernel functions are supported, so we can assume for now that
|
|
/// every function is a kernel function, but in the future we should use
|
|
/// separate calling conventions for kernel and non-kernel functions.
|
|
SDValue R600TargetLowering::LowerFormalArguments(
|
|
SDValue Chain,
|
|
CallingConv::ID CallConv,
|
|
bool isVarArg,
|
|
const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
DebugLoc DL, SelectionDAG &DAG,
|
|
SmallVectorImpl<SDValue> &InVals) const {
|
|
unsigned ParamOffsetBytes = 36;
|
|
Function::const_arg_iterator FuncArg =
|
|
DAG.getMachineFunction().getFunction()->arg_begin();
|
|
for (unsigned i = 0, e = Ins.size(); i < e; ++i, ++FuncArg) {
|
|
EVT VT = Ins[i].VT;
|
|
Type *ArgType = FuncArg->getType();
|
|
unsigned ArgSizeInBits = ArgType->isPointerTy() ?
|
|
32 : ArgType->getPrimitiveSizeInBits();
|
|
unsigned ArgBytes = ArgSizeInBits >> 3;
|
|
EVT ArgVT;
|
|
if (ArgSizeInBits < VT.getSizeInBits()) {
|
|
assert(!ArgType->isFloatTy() &&
|
|
"Extending floating point arguments not supported yet");
|
|
ArgVT = MVT::getIntegerVT(ArgSizeInBits);
|
|
} else {
|
|
ArgVT = VT;
|
|
}
|
|
PointerType *PtrTy = PointerType::get(VT.getTypeForEVT(*DAG.getContext()),
|
|
AMDGPUAS::PARAM_I_ADDRESS);
|
|
SDValue Arg = DAG.getExtLoad(ISD::ZEXTLOAD, DL, VT, DAG.getRoot(),
|
|
DAG.getConstant(ParamOffsetBytes, MVT::i32),
|
|
MachinePointerInfo(UndefValue::get(PtrTy)),
|
|
ArgVT, false, false, ArgBytes);
|
|
InVals.push_back(Arg);
|
|
ParamOffsetBytes += ArgBytes;
|
|
}
|
|
return Chain;
|
|
}
|
|
|
|
EVT R600TargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
|
|
if (!VT.isVector()) return MVT::i32;
|
|
return VT.changeVectorElementTypeToInteger();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Custom DAG Optimizations
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
SDValue R600TargetLowering::PerformDAGCombine(SDNode *N,
|
|
DAGCombinerInfo &DCI) const {
|
|
SelectionDAG &DAG = DCI.DAG;
|
|
|
|
switch (N->getOpcode()) {
|
|
// (f32 fp_round (f64 uint_to_fp a)) -> (f32 uint_to_fp a)
|
|
case ISD::FP_ROUND: {
|
|
SDValue Arg = N->getOperand(0);
|
|
if (Arg.getOpcode() == ISD::UINT_TO_FP && Arg.getValueType() == MVT::f64) {
|
|
return DAG.getNode(ISD::UINT_TO_FP, N->getDebugLoc(), N->getValueType(0),
|
|
Arg.getOperand(0));
|
|
}
|
|
break;
|
|
}
|
|
|
|
// (i32 fp_to_sint (fneg (select_cc f32, f32, 1.0, 0.0 cc))) ->
|
|
// (i32 select_cc f32, f32, -1, 0 cc)
|
|
//
|
|
// Mesa's GLSL frontend generates the above pattern a lot and we can lower
|
|
// this to one of the SET*_DX10 instructions.
|
|
case ISD::FP_TO_SINT: {
|
|
SDValue FNeg = N->getOperand(0);
|
|
if (FNeg.getOpcode() != ISD::FNEG) {
|
|
return SDValue();
|
|
}
|
|
SDValue SelectCC = FNeg.getOperand(0);
|
|
if (SelectCC.getOpcode() != ISD::SELECT_CC ||
|
|
SelectCC.getOperand(0).getValueType() != MVT::f32 || // LHS
|
|
SelectCC.getOperand(2).getValueType() != MVT::f32 || // True
|
|
!isHWTrueValue(SelectCC.getOperand(2)) ||
|
|
!isHWFalseValue(SelectCC.getOperand(3))) {
|
|
return SDValue();
|
|
}
|
|
|
|
return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(), N->getValueType(0),
|
|
SelectCC.getOperand(0), // LHS
|
|
SelectCC.getOperand(1), // RHS
|
|
DAG.getConstant(-1, MVT::i32), // True
|
|
DAG.getConstant(0, MVT::i32), // Flase
|
|
SelectCC.getOperand(4)); // CC
|
|
|
|
break;
|
|
}
|
|
// Extract_vec (Build_vector) generated by custom lowering
|
|
// also needs to be customly combined
|
|
case ISD::EXTRACT_VECTOR_ELT: {
|
|
SDValue Arg = N->getOperand(0);
|
|
if (Arg.getOpcode() == ISD::BUILD_VECTOR) {
|
|
if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
|
|
unsigned Element = Const->getZExtValue();
|
|
return Arg->getOperand(Element);
|
|
}
|
|
}
|
|
if (Arg.getOpcode() == ISD::BITCAST &&
|
|
Arg.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
|
|
if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
|
|
unsigned Element = Const->getZExtValue();
|
|
return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), N->getVTList(),
|
|
Arg->getOperand(0).getOperand(Element));
|
|
}
|
|
}
|
|
}
|
|
|
|
case ISD::SELECT_CC: {
|
|
// fold selectcc (selectcc x, y, a, b, cc), b, a, b, seteq ->
|
|
// selectcc x, y, a, b, inv(cc)
|
|
//
|
|
// fold selectcc (selectcc x, y, a, b, cc), b, a, b, setne ->
|
|
// selectcc x, y, a, b, cc
|
|
SDValue LHS = N->getOperand(0);
|
|
if (LHS.getOpcode() != ISD::SELECT_CC) {
|
|
return SDValue();
|
|
}
|
|
|
|
SDValue RHS = N->getOperand(1);
|
|
SDValue True = N->getOperand(2);
|
|
SDValue False = N->getOperand(3);
|
|
ISD::CondCode NCC = cast<CondCodeSDNode>(N->getOperand(4))->get();
|
|
|
|
if (LHS.getOperand(2).getNode() != True.getNode() ||
|
|
LHS.getOperand(3).getNode() != False.getNode() ||
|
|
RHS.getNode() != False.getNode()) {
|
|
return SDValue();
|
|
}
|
|
|
|
switch (NCC) {
|
|
default: return SDValue();
|
|
case ISD::SETNE: return LHS;
|
|
case ISD::SETEQ: {
|
|
ISD::CondCode LHSCC = cast<CondCodeSDNode>(LHS.getOperand(4))->get();
|
|
LHSCC = ISD::getSetCCInverse(LHSCC,
|
|
LHS.getOperand(0).getValueType().isInteger());
|
|
return DAG.getSelectCC(N->getDebugLoc(),
|
|
LHS.getOperand(0),
|
|
LHS.getOperand(1),
|
|
LHS.getOperand(2),
|
|
LHS.getOperand(3),
|
|
LHSCC);
|
|
}
|
|
}
|
|
}
|
|
case AMDGPUISD::EXPORT: {
|
|
SDValue Arg = N->getOperand(1);
|
|
if (Arg.getOpcode() != ISD::BUILD_VECTOR)
|
|
break;
|
|
SDValue NewBldVec[4] = {
|
|
DAG.getUNDEF(MVT::f32),
|
|
DAG.getUNDEF(MVT::f32),
|
|
DAG.getUNDEF(MVT::f32),
|
|
DAG.getUNDEF(MVT::f32)
|
|
};
|
|
SDValue NewArgs[8] = {
|
|
N->getOperand(0), // Chain
|
|
SDValue(),
|
|
N->getOperand(2), // ArrayBase
|
|
N->getOperand(3), // Type
|
|
N->getOperand(4), // SWZ_X
|
|
N->getOperand(5), // SWZ_Y
|
|
N->getOperand(6), // SWZ_Z
|
|
N->getOperand(7) // SWZ_W
|
|
};
|
|
for (unsigned i = 0; i < Arg.getNumOperands(); i++) {
|
|
if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Arg.getOperand(i))) {
|
|
if (C->isZero()) {
|
|
NewArgs[4 + i] = DAG.getConstant(4, MVT::i32); // SEL_0
|
|
} else if (C->isExactlyValue(1.0)) {
|
|
NewArgs[4 + i] = DAG.getConstant(5, MVT::i32); // SEL_0
|
|
} else {
|
|
NewBldVec[i] = Arg.getOperand(i);
|
|
}
|
|
} else {
|
|
NewBldVec[i] = Arg.getOperand(i);
|
|
}
|
|
}
|
|
DebugLoc DL = N->getDebugLoc();
|
|
NewArgs[1] = DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v4f32, NewBldVec, 4);
|
|
return DAG.getNode(AMDGPUISD::EXPORT, DL, N->getVTList(), NewArgs, 8);
|
|
}
|
|
}
|
|
return SDValue();
|
|
}
|