mirror of
https://github.com/RPCS3/llvm-mirror.git
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1484 lines
49 KiB
C++
1484 lines
49 KiB
C++
//===-- R600InstrInfo.cpp - R600 Instruction Information ------------------===//
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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 R600 Implementation of TargetInstrInfo.
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//
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//===----------------------------------------------------------------------===//
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#include "R600InstrInfo.h"
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#include "AMDGPU.h"
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#include "AMDGPUSubtarget.h"
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#include "AMDGPUTargetMachine.h"
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#include "R600Defines.h"
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#include "R600MachineFunctionInfo.h"
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#include "R600RegisterInfo.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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using namespace llvm;
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#define GET_INSTRINFO_CTOR_DTOR
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#include "AMDGPUGenDFAPacketizer.inc"
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R600InstrInfo::R600InstrInfo(const R600Subtarget &ST)
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: AMDGPUInstrInfo(ST), RI(), ST(ST) {}
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bool R600InstrInfo::isVector(const MachineInstr &MI) const {
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return get(MI.getOpcode()).TSFlags & R600_InstFlag::VECTOR;
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}
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void R600InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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const DebugLoc &DL, unsigned DestReg,
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unsigned SrcReg, bool KillSrc) const {
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unsigned VectorComponents = 0;
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if ((AMDGPU::R600_Reg128RegClass.contains(DestReg) ||
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AMDGPU::R600_Reg128VerticalRegClass.contains(DestReg)) &&
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(AMDGPU::R600_Reg128RegClass.contains(SrcReg) ||
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AMDGPU::R600_Reg128VerticalRegClass.contains(SrcReg))) {
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VectorComponents = 4;
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} else if((AMDGPU::R600_Reg64RegClass.contains(DestReg) ||
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AMDGPU::R600_Reg64VerticalRegClass.contains(DestReg)) &&
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(AMDGPU::R600_Reg64RegClass.contains(SrcReg) ||
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AMDGPU::R600_Reg64VerticalRegClass.contains(SrcReg))) {
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VectorComponents = 2;
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}
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if (VectorComponents > 0) {
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for (unsigned I = 0; I < VectorComponents; I++) {
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unsigned SubRegIndex = RI.getSubRegFromChannel(I);
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buildDefaultInstruction(MBB, MI, AMDGPU::MOV,
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RI.getSubReg(DestReg, SubRegIndex),
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RI.getSubReg(SrcReg, SubRegIndex))
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.addReg(DestReg,
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RegState::Define | RegState::Implicit);
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}
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} else {
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MachineInstr *NewMI = buildDefaultInstruction(MBB, MI, AMDGPU::MOV,
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DestReg, SrcReg);
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NewMI->getOperand(getOperandIdx(*NewMI, AMDGPU::OpName::src0))
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.setIsKill(KillSrc);
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}
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}
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/// \returns true if \p MBBI can be moved into a new basic.
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bool R600InstrInfo::isLegalToSplitMBBAt(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI) const {
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for (MachineInstr::const_mop_iterator I = MBBI->operands_begin(),
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E = MBBI->operands_end(); I != E; ++I) {
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if (I->isReg() && !TargetRegisterInfo::isVirtualRegister(I->getReg()) &&
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I->isUse() && RI.isPhysRegLiveAcrossClauses(I->getReg()))
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return false;
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}
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return true;
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}
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bool R600InstrInfo::isMov(unsigned Opcode) const {
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switch(Opcode) {
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default:
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return false;
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case AMDGPU::MOV:
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case AMDGPU::MOV_IMM_F32:
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case AMDGPU::MOV_IMM_I32:
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return true;
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}
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}
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bool R600InstrInfo::isReductionOp(unsigned Opcode) const {
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return false;
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}
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bool R600InstrInfo::isCubeOp(unsigned Opcode) const {
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switch(Opcode) {
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default: return false;
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case AMDGPU::CUBE_r600_pseudo:
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case AMDGPU::CUBE_r600_real:
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case AMDGPU::CUBE_eg_pseudo:
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case AMDGPU::CUBE_eg_real:
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return true;
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}
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}
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bool R600InstrInfo::isALUInstr(unsigned Opcode) const {
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unsigned TargetFlags = get(Opcode).TSFlags;
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return (TargetFlags & R600_InstFlag::ALU_INST);
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}
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bool R600InstrInfo::hasInstrModifiers(unsigned Opcode) const {
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unsigned TargetFlags = get(Opcode).TSFlags;
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return ((TargetFlags & R600_InstFlag::OP1) |
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(TargetFlags & R600_InstFlag::OP2) |
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(TargetFlags & R600_InstFlag::OP3));
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}
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bool R600InstrInfo::isLDSInstr(unsigned Opcode) const {
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unsigned TargetFlags = get(Opcode).TSFlags;
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return ((TargetFlags & R600_InstFlag::LDS_1A) |
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(TargetFlags & R600_InstFlag::LDS_1A1D) |
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(TargetFlags & R600_InstFlag::LDS_1A2D));
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}
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bool R600InstrInfo::isLDSRetInstr(unsigned Opcode) const {
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return isLDSInstr(Opcode) && getOperandIdx(Opcode, AMDGPU::OpName::dst) != -1;
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}
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bool R600InstrInfo::canBeConsideredALU(const MachineInstr &MI) const {
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if (isALUInstr(MI.getOpcode()))
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return true;
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if (isVector(MI) || isCubeOp(MI.getOpcode()))
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return true;
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switch (MI.getOpcode()) {
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case AMDGPU::PRED_X:
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case AMDGPU::INTERP_PAIR_XY:
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case AMDGPU::INTERP_PAIR_ZW:
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case AMDGPU::INTERP_VEC_LOAD:
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case AMDGPU::COPY:
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case AMDGPU::DOT_4:
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return true;
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default:
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return false;
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}
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}
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bool R600InstrInfo::isTransOnly(unsigned Opcode) const {
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if (ST.hasCaymanISA())
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return false;
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return (get(Opcode).getSchedClass() == AMDGPU::Sched::TransALU);
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}
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bool R600InstrInfo::isTransOnly(const MachineInstr &MI) const {
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return isTransOnly(MI.getOpcode());
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}
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bool R600InstrInfo::isVectorOnly(unsigned Opcode) const {
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return (get(Opcode).getSchedClass() == AMDGPU::Sched::VecALU);
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}
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bool R600InstrInfo::isVectorOnly(const MachineInstr &MI) const {
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return isVectorOnly(MI.getOpcode());
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}
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bool R600InstrInfo::isExport(unsigned Opcode) const {
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return (get(Opcode).TSFlags & R600_InstFlag::IS_EXPORT);
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}
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bool R600InstrInfo::usesVertexCache(unsigned Opcode) const {
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return ST.hasVertexCache() && IS_VTX(get(Opcode));
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}
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bool R600InstrInfo::usesVertexCache(const MachineInstr &MI) const {
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const MachineFunction *MF = MI.getParent()->getParent();
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return !AMDGPU::isCompute(MF->getFunction()->getCallingConv()) &&
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usesVertexCache(MI.getOpcode());
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}
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bool R600InstrInfo::usesTextureCache(unsigned Opcode) const {
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return (!ST.hasVertexCache() && IS_VTX(get(Opcode))) || IS_TEX(get(Opcode));
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}
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bool R600InstrInfo::usesTextureCache(const MachineInstr &MI) const {
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const MachineFunction *MF = MI.getParent()->getParent();
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return (AMDGPU::isCompute(MF->getFunction()->getCallingConv()) &&
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usesVertexCache(MI.getOpcode())) ||
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usesTextureCache(MI.getOpcode());
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}
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bool R600InstrInfo::mustBeLastInClause(unsigned Opcode) const {
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switch (Opcode) {
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case AMDGPU::KILLGT:
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case AMDGPU::GROUP_BARRIER:
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return true;
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default:
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return false;
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}
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}
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bool R600InstrInfo::usesAddressRegister(MachineInstr &MI) const {
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return MI.findRegisterUseOperandIdx(AMDGPU::AR_X) != -1;
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}
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bool R600InstrInfo::definesAddressRegister(MachineInstr &MI) const {
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return MI.findRegisterDefOperandIdx(AMDGPU::AR_X) != -1;
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}
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bool R600InstrInfo::readsLDSSrcReg(const MachineInstr &MI) const {
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if (!isALUInstr(MI.getOpcode())) {
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return false;
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}
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for (MachineInstr::const_mop_iterator I = MI.operands_begin(),
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E = MI.operands_end();
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I != E; ++I) {
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if (!I->isReg() || !I->isUse() ||
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TargetRegisterInfo::isVirtualRegister(I->getReg()))
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continue;
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if (AMDGPU::R600_LDS_SRC_REGRegClass.contains(I->getReg()))
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return true;
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}
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return false;
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}
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int R600InstrInfo::getSelIdx(unsigned Opcode, unsigned SrcIdx) const {
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static const unsigned SrcSelTable[][2] = {
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{AMDGPU::OpName::src0, AMDGPU::OpName::src0_sel},
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{AMDGPU::OpName::src1, AMDGPU::OpName::src1_sel},
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{AMDGPU::OpName::src2, AMDGPU::OpName::src2_sel},
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{AMDGPU::OpName::src0_X, AMDGPU::OpName::src0_sel_X},
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{AMDGPU::OpName::src0_Y, AMDGPU::OpName::src0_sel_Y},
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{AMDGPU::OpName::src0_Z, AMDGPU::OpName::src0_sel_Z},
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{AMDGPU::OpName::src0_W, AMDGPU::OpName::src0_sel_W},
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{AMDGPU::OpName::src1_X, AMDGPU::OpName::src1_sel_X},
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{AMDGPU::OpName::src1_Y, AMDGPU::OpName::src1_sel_Y},
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{AMDGPU::OpName::src1_Z, AMDGPU::OpName::src1_sel_Z},
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{AMDGPU::OpName::src1_W, AMDGPU::OpName::src1_sel_W}
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};
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for (const auto &Row : SrcSelTable) {
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if (getOperandIdx(Opcode, Row[0]) == (int)SrcIdx) {
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return getOperandIdx(Opcode, Row[1]);
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}
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}
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return -1;
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}
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SmallVector<std::pair<MachineOperand *, int64_t>, 3>
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R600InstrInfo::getSrcs(MachineInstr &MI) const {
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SmallVector<std::pair<MachineOperand *, int64_t>, 3> Result;
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if (MI.getOpcode() == AMDGPU::DOT_4) {
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static const unsigned OpTable[8][2] = {
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{AMDGPU::OpName::src0_X, AMDGPU::OpName::src0_sel_X},
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{AMDGPU::OpName::src0_Y, AMDGPU::OpName::src0_sel_Y},
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{AMDGPU::OpName::src0_Z, AMDGPU::OpName::src0_sel_Z},
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{AMDGPU::OpName::src0_W, AMDGPU::OpName::src0_sel_W},
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{AMDGPU::OpName::src1_X, AMDGPU::OpName::src1_sel_X},
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{AMDGPU::OpName::src1_Y, AMDGPU::OpName::src1_sel_Y},
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{AMDGPU::OpName::src1_Z, AMDGPU::OpName::src1_sel_Z},
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{AMDGPU::OpName::src1_W, AMDGPU::OpName::src1_sel_W},
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};
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for (unsigned j = 0; j < 8; j++) {
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MachineOperand &MO =
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MI.getOperand(getOperandIdx(MI.getOpcode(), OpTable[j][0]));
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unsigned Reg = MO.getReg();
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if (Reg == AMDGPU::ALU_CONST) {
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MachineOperand &Sel =
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MI.getOperand(getOperandIdx(MI.getOpcode(), OpTable[j][1]));
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Result.push_back(std::make_pair(&MO, Sel.getImm()));
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continue;
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}
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}
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return Result;
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}
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static const unsigned OpTable[3][2] = {
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{AMDGPU::OpName::src0, AMDGPU::OpName::src0_sel},
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{AMDGPU::OpName::src1, AMDGPU::OpName::src1_sel},
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{AMDGPU::OpName::src2, AMDGPU::OpName::src2_sel},
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};
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for (unsigned j = 0; j < 3; j++) {
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int SrcIdx = getOperandIdx(MI.getOpcode(), OpTable[j][0]);
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if (SrcIdx < 0)
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break;
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MachineOperand &MO = MI.getOperand(SrcIdx);
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unsigned Reg = MO.getReg();
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if (Reg == AMDGPU::ALU_CONST) {
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MachineOperand &Sel =
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MI.getOperand(getOperandIdx(MI.getOpcode(), OpTable[j][1]));
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Result.push_back(std::make_pair(&MO, Sel.getImm()));
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continue;
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}
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if (Reg == AMDGPU::ALU_LITERAL_X) {
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MachineOperand &Operand =
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MI.getOperand(getOperandIdx(MI.getOpcode(), AMDGPU::OpName::literal));
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if (Operand.isImm()) {
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Result.push_back(std::make_pair(&MO, Operand.getImm()));
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continue;
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}
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assert(Operand.isGlobal());
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}
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Result.push_back(std::make_pair(&MO, 0));
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}
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return Result;
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}
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std::vector<std::pair<int, unsigned>>
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R600InstrInfo::ExtractSrcs(MachineInstr &MI,
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const DenseMap<unsigned, unsigned> &PV,
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unsigned &ConstCount) const {
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ConstCount = 0;
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const std::pair<int, unsigned> DummyPair(-1, 0);
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std::vector<std::pair<int, unsigned> > Result;
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unsigned i = 0;
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for (const auto &Src : getSrcs(MI)) {
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++i;
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unsigned Reg = Src.first->getReg();
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int Index = RI.getEncodingValue(Reg) & 0xff;
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if (Reg == AMDGPU::OQAP) {
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Result.push_back(std::make_pair(Index, 0U));
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}
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if (PV.find(Reg) != PV.end()) {
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// 255 is used to tells its a PS/PV reg
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Result.push_back(std::make_pair(255, 0U));
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continue;
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}
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if (Index > 127) {
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ConstCount++;
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Result.push_back(DummyPair);
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continue;
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}
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unsigned Chan = RI.getHWRegChan(Reg);
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Result.push_back(std::make_pair(Index, Chan));
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}
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for (; i < 3; ++i)
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Result.push_back(DummyPair);
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return Result;
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}
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static std::vector<std::pair<int, unsigned> >
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Swizzle(std::vector<std::pair<int, unsigned> > Src,
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R600InstrInfo::BankSwizzle Swz) {
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if (Src[0] == Src[1])
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Src[1].first = -1;
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switch (Swz) {
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case R600InstrInfo::ALU_VEC_012_SCL_210:
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break;
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case R600InstrInfo::ALU_VEC_021_SCL_122:
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std::swap(Src[1], Src[2]);
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break;
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case R600InstrInfo::ALU_VEC_102_SCL_221:
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std::swap(Src[0], Src[1]);
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break;
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case R600InstrInfo::ALU_VEC_120_SCL_212:
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std::swap(Src[0], Src[1]);
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std::swap(Src[0], Src[2]);
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break;
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case R600InstrInfo::ALU_VEC_201:
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std::swap(Src[0], Src[2]);
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std::swap(Src[0], Src[1]);
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break;
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case R600InstrInfo::ALU_VEC_210:
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std::swap(Src[0], Src[2]);
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break;
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}
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return Src;
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}
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static unsigned getTransSwizzle(R600InstrInfo::BankSwizzle Swz, unsigned Op) {
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switch (Swz) {
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case R600InstrInfo::ALU_VEC_012_SCL_210: {
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unsigned Cycles[3] = { 2, 1, 0};
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return Cycles[Op];
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}
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case R600InstrInfo::ALU_VEC_021_SCL_122: {
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unsigned Cycles[3] = { 1, 2, 2};
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return Cycles[Op];
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}
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case R600InstrInfo::ALU_VEC_120_SCL_212: {
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unsigned Cycles[3] = { 2, 1, 2};
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return Cycles[Op];
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}
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case R600InstrInfo::ALU_VEC_102_SCL_221: {
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unsigned Cycles[3] = { 2, 2, 1};
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return Cycles[Op];
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}
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default:
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llvm_unreachable("Wrong Swizzle for Trans Slot");
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}
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}
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/// returns how many MIs (whose inputs are represented by IGSrcs) can be packed
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/// in the same Instruction Group while meeting read port limitations given a
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/// Swz swizzle sequence.
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unsigned R600InstrInfo::isLegalUpTo(
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const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs,
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const std::vector<R600InstrInfo::BankSwizzle> &Swz,
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const std::vector<std::pair<int, unsigned> > &TransSrcs,
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R600InstrInfo::BankSwizzle TransSwz) const {
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int Vector[4][3];
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memset(Vector, -1, sizeof(Vector));
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for (unsigned i = 0, e = IGSrcs.size(); i < e; i++) {
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const std::vector<std::pair<int, unsigned> > &Srcs =
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Swizzle(IGSrcs[i], Swz[i]);
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for (unsigned j = 0; j < 3; j++) {
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const std::pair<int, unsigned> &Src = Srcs[j];
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if (Src.first < 0 || Src.first == 255)
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continue;
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if (Src.first == GET_REG_INDEX(RI.getEncodingValue(AMDGPU::OQAP))) {
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if (Swz[i] != R600InstrInfo::ALU_VEC_012_SCL_210 &&
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Swz[i] != R600InstrInfo::ALU_VEC_021_SCL_122) {
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// The value from output queue A (denoted by register OQAP) can
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// only be fetched during the first cycle.
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return false;
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}
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// OQAP does not count towards the normal read port restrictions
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continue;
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}
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if (Vector[Src.second][j] < 0)
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Vector[Src.second][j] = Src.first;
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if (Vector[Src.second][j] != Src.first)
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return i;
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}
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}
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// Now check Trans Alu
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for (unsigned i = 0, e = TransSrcs.size(); i < e; ++i) {
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const std::pair<int, unsigned> &Src = TransSrcs[i];
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unsigned Cycle = getTransSwizzle(TransSwz, i);
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if (Src.first < 0)
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continue;
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if (Src.first == 255)
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continue;
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if (Vector[Src.second][Cycle] < 0)
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Vector[Src.second][Cycle] = Src.first;
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if (Vector[Src.second][Cycle] != Src.first)
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return IGSrcs.size() - 1;
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}
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return IGSrcs.size();
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}
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/// Given a swizzle sequence SwzCandidate and an index Idx, returns the next
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/// (in lexicographic term) swizzle sequence assuming that all swizzles after
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/// Idx can be skipped
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static bool
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NextPossibleSolution(
|
|
std::vector<R600InstrInfo::BankSwizzle> &SwzCandidate,
|
|
unsigned Idx) {
|
|
assert(Idx < SwzCandidate.size());
|
|
int ResetIdx = Idx;
|
|
while (ResetIdx > -1 && SwzCandidate[ResetIdx] == R600InstrInfo::ALU_VEC_210)
|
|
ResetIdx --;
|
|
for (unsigned i = ResetIdx + 1, e = SwzCandidate.size(); i < e; i++) {
|
|
SwzCandidate[i] = R600InstrInfo::ALU_VEC_012_SCL_210;
|
|
}
|
|
if (ResetIdx == -1)
|
|
return false;
|
|
int NextSwizzle = SwzCandidate[ResetIdx] + 1;
|
|
SwzCandidate[ResetIdx] = (R600InstrInfo::BankSwizzle)NextSwizzle;
|
|
return true;
|
|
}
|
|
|
|
/// Enumerate all possible Swizzle sequence to find one that can meet all
|
|
/// read port requirements.
|
|
bool R600InstrInfo::FindSwizzleForVectorSlot(
|
|
const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs,
|
|
std::vector<R600InstrInfo::BankSwizzle> &SwzCandidate,
|
|
const std::vector<std::pair<int, unsigned> > &TransSrcs,
|
|
R600InstrInfo::BankSwizzle TransSwz) const {
|
|
unsigned ValidUpTo = 0;
|
|
do {
|
|
ValidUpTo = isLegalUpTo(IGSrcs, SwzCandidate, TransSrcs, TransSwz);
|
|
if (ValidUpTo == IGSrcs.size())
|
|
return true;
|
|
} while (NextPossibleSolution(SwzCandidate, ValidUpTo));
|
|
return false;
|
|
}
|
|
|
|
/// Instructions in Trans slot can't read gpr at cycle 0 if they also read
|
|
/// a const, and can't read a gpr at cycle 1 if they read 2 const.
|
|
static bool
|
|
isConstCompatible(R600InstrInfo::BankSwizzle TransSwz,
|
|
const std::vector<std::pair<int, unsigned> > &TransOps,
|
|
unsigned ConstCount) {
|
|
// TransALU can't read 3 constants
|
|
if (ConstCount > 2)
|
|
return false;
|
|
for (unsigned i = 0, e = TransOps.size(); i < e; ++i) {
|
|
const std::pair<int, unsigned> &Src = TransOps[i];
|
|
unsigned Cycle = getTransSwizzle(TransSwz, i);
|
|
if (Src.first < 0)
|
|
continue;
|
|
if (ConstCount > 0 && Cycle == 0)
|
|
return false;
|
|
if (ConstCount > 1 && Cycle == 1)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
R600InstrInfo::fitsReadPortLimitations(const std::vector<MachineInstr *> &IG,
|
|
const DenseMap<unsigned, unsigned> &PV,
|
|
std::vector<BankSwizzle> &ValidSwizzle,
|
|
bool isLastAluTrans)
|
|
const {
|
|
//Todo : support shared src0 - src1 operand
|
|
|
|
std::vector<std::vector<std::pair<int, unsigned> > > IGSrcs;
|
|
ValidSwizzle.clear();
|
|
unsigned ConstCount;
|
|
BankSwizzle TransBS = ALU_VEC_012_SCL_210;
|
|
for (unsigned i = 0, e = IG.size(); i < e; ++i) {
|
|
IGSrcs.push_back(ExtractSrcs(*IG[i], PV, ConstCount));
|
|
unsigned Op = getOperandIdx(IG[i]->getOpcode(),
|
|
AMDGPU::OpName::bank_swizzle);
|
|
ValidSwizzle.push_back( (R600InstrInfo::BankSwizzle)
|
|
IG[i]->getOperand(Op).getImm());
|
|
}
|
|
std::vector<std::pair<int, unsigned> > TransOps;
|
|
if (!isLastAluTrans)
|
|
return FindSwizzleForVectorSlot(IGSrcs, ValidSwizzle, TransOps, TransBS);
|
|
|
|
TransOps = std::move(IGSrcs.back());
|
|
IGSrcs.pop_back();
|
|
ValidSwizzle.pop_back();
|
|
|
|
static const R600InstrInfo::BankSwizzle TransSwz[] = {
|
|
ALU_VEC_012_SCL_210,
|
|
ALU_VEC_021_SCL_122,
|
|
ALU_VEC_120_SCL_212,
|
|
ALU_VEC_102_SCL_221
|
|
};
|
|
for (unsigned i = 0; i < 4; i++) {
|
|
TransBS = TransSwz[i];
|
|
if (!isConstCompatible(TransBS, TransOps, ConstCount))
|
|
continue;
|
|
bool Result = FindSwizzleForVectorSlot(IGSrcs, ValidSwizzle, TransOps,
|
|
TransBS);
|
|
if (Result) {
|
|
ValidSwizzle.push_back(TransBS);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
bool
|
|
R600InstrInfo::fitsConstReadLimitations(const std::vector<unsigned> &Consts)
|
|
const {
|
|
assert (Consts.size() <= 12 && "Too many operands in instructions group");
|
|
unsigned Pair1 = 0, Pair2 = 0;
|
|
for (unsigned i = 0, n = Consts.size(); i < n; ++i) {
|
|
unsigned ReadConstHalf = Consts[i] & 2;
|
|
unsigned ReadConstIndex = Consts[i] & (~3);
|
|
unsigned ReadHalfConst = ReadConstIndex | ReadConstHalf;
|
|
if (!Pair1) {
|
|
Pair1 = ReadHalfConst;
|
|
continue;
|
|
}
|
|
if (Pair1 == ReadHalfConst)
|
|
continue;
|
|
if (!Pair2) {
|
|
Pair2 = ReadHalfConst;
|
|
continue;
|
|
}
|
|
if (Pair2 != ReadHalfConst)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
R600InstrInfo::fitsConstReadLimitations(const std::vector<MachineInstr *> &MIs)
|
|
const {
|
|
std::vector<unsigned> Consts;
|
|
SmallSet<int64_t, 4> Literals;
|
|
for (unsigned i = 0, n = MIs.size(); i < n; i++) {
|
|
MachineInstr &MI = *MIs[i];
|
|
if (!isALUInstr(MI.getOpcode()))
|
|
continue;
|
|
|
|
for (const auto &Src : getSrcs(MI)) {
|
|
if (Src.first->getReg() == AMDGPU::ALU_LITERAL_X)
|
|
Literals.insert(Src.second);
|
|
if (Literals.size() > 4)
|
|
return false;
|
|
if (Src.first->getReg() == AMDGPU::ALU_CONST)
|
|
Consts.push_back(Src.second);
|
|
if (AMDGPU::R600_KC0RegClass.contains(Src.first->getReg()) ||
|
|
AMDGPU::R600_KC1RegClass.contains(Src.first->getReg())) {
|
|
unsigned Index = RI.getEncodingValue(Src.first->getReg()) & 0xff;
|
|
unsigned Chan = RI.getHWRegChan(Src.first->getReg());
|
|
Consts.push_back((Index << 2) | Chan);
|
|
}
|
|
}
|
|
}
|
|
return fitsConstReadLimitations(Consts);
|
|
}
|
|
|
|
DFAPacketizer *
|
|
R600InstrInfo::CreateTargetScheduleState(const TargetSubtargetInfo &STI) const {
|
|
const InstrItineraryData *II = STI.getInstrItineraryData();
|
|
return static_cast<const R600Subtarget &>(STI).createDFAPacketizer(II);
|
|
}
|
|
|
|
static bool
|
|
isPredicateSetter(unsigned Opcode) {
|
|
switch (Opcode) {
|
|
case AMDGPU::PRED_X:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static MachineInstr *
|
|
findFirstPredicateSetterFrom(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I) {
|
|
while (I != MBB.begin()) {
|
|
--I;
|
|
MachineInstr &MI = *I;
|
|
if (isPredicateSetter(MI.getOpcode()))
|
|
return &MI;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
static
|
|
bool isJump(unsigned Opcode) {
|
|
return Opcode == AMDGPU::JUMP || Opcode == AMDGPU::JUMP_COND;
|
|
}
|
|
|
|
static bool isBranch(unsigned Opcode) {
|
|
return Opcode == AMDGPU::BRANCH || Opcode == AMDGPU::BRANCH_COND_i32 ||
|
|
Opcode == AMDGPU::BRANCH_COND_f32;
|
|
}
|
|
|
|
bool R600InstrInfo::analyzeBranch(MachineBasicBlock &MBB,
|
|
MachineBasicBlock *&TBB,
|
|
MachineBasicBlock *&FBB,
|
|
SmallVectorImpl<MachineOperand> &Cond,
|
|
bool AllowModify) const {
|
|
// Most of the following comes from the ARM implementation of AnalyzeBranch
|
|
|
|
// If the block has no terminators, it just falls into the block after it.
|
|
MachineBasicBlock::iterator I = MBB.getLastNonDebugInstr();
|
|
if (I == MBB.end())
|
|
return false;
|
|
|
|
// AMDGPU::BRANCH* instructions are only available after isel and are not
|
|
// handled
|
|
if (isBranch(I->getOpcode()))
|
|
return true;
|
|
if (!isJump(I->getOpcode())) {
|
|
return false;
|
|
}
|
|
|
|
// Remove successive JUMP
|
|
while (I != MBB.begin() && std::prev(I)->getOpcode() == AMDGPU::JUMP) {
|
|
MachineBasicBlock::iterator PriorI = std::prev(I);
|
|
if (AllowModify)
|
|
I->removeFromParent();
|
|
I = PriorI;
|
|
}
|
|
MachineInstr &LastInst = *I;
|
|
|
|
// If there is only one terminator instruction, process it.
|
|
unsigned LastOpc = LastInst.getOpcode();
|
|
if (I == MBB.begin() || !isJump((--I)->getOpcode())) {
|
|
if (LastOpc == AMDGPU::JUMP) {
|
|
TBB = LastInst.getOperand(0).getMBB();
|
|
return false;
|
|
} else if (LastOpc == AMDGPU::JUMP_COND) {
|
|
auto predSet = I;
|
|
while (!isPredicateSetter(predSet->getOpcode())) {
|
|
predSet = --I;
|
|
}
|
|
TBB = LastInst.getOperand(0).getMBB();
|
|
Cond.push_back(predSet->getOperand(1));
|
|
Cond.push_back(predSet->getOperand(2));
|
|
Cond.push_back(MachineOperand::CreateReg(AMDGPU::PRED_SEL_ONE, false));
|
|
return false;
|
|
}
|
|
return true; // Can't handle indirect branch.
|
|
}
|
|
|
|
// Get the instruction before it if it is a terminator.
|
|
MachineInstr &SecondLastInst = *I;
|
|
unsigned SecondLastOpc = SecondLastInst.getOpcode();
|
|
|
|
// If the block ends with a B and a Bcc, handle it.
|
|
if (SecondLastOpc == AMDGPU::JUMP_COND && LastOpc == AMDGPU::JUMP) {
|
|
auto predSet = --I;
|
|
while (!isPredicateSetter(predSet->getOpcode())) {
|
|
predSet = --I;
|
|
}
|
|
TBB = SecondLastInst.getOperand(0).getMBB();
|
|
FBB = LastInst.getOperand(0).getMBB();
|
|
Cond.push_back(predSet->getOperand(1));
|
|
Cond.push_back(predSet->getOperand(2));
|
|
Cond.push_back(MachineOperand::CreateReg(AMDGPU::PRED_SEL_ONE, false));
|
|
return false;
|
|
}
|
|
|
|
// Otherwise, can't handle this.
|
|
return true;
|
|
}
|
|
|
|
static
|
|
MachineBasicBlock::iterator FindLastAluClause(MachineBasicBlock &MBB) {
|
|
for (MachineBasicBlock::reverse_iterator It = MBB.rbegin(), E = MBB.rend();
|
|
It != E; ++It) {
|
|
if (It->getOpcode() == AMDGPU::CF_ALU ||
|
|
It->getOpcode() == AMDGPU::CF_ALU_PUSH_BEFORE)
|
|
return It.getReverse();
|
|
}
|
|
return MBB.end();
|
|
}
|
|
|
|
unsigned R600InstrInfo::insertBranch(MachineBasicBlock &MBB,
|
|
MachineBasicBlock *TBB,
|
|
MachineBasicBlock *FBB,
|
|
ArrayRef<MachineOperand> Cond,
|
|
const DebugLoc &DL,
|
|
int *BytesAdded) const {
|
|
assert(TBB && "insertBranch must not be told to insert a fallthrough");
|
|
assert(!BytesAdded && "code size not handled");
|
|
|
|
if (!FBB) {
|
|
if (Cond.empty()) {
|
|
BuildMI(&MBB, DL, get(AMDGPU::JUMP)).addMBB(TBB);
|
|
return 1;
|
|
} else {
|
|
MachineInstr *PredSet = findFirstPredicateSetterFrom(MBB, MBB.end());
|
|
assert(PredSet && "No previous predicate !");
|
|
addFlag(*PredSet, 0, MO_FLAG_PUSH);
|
|
PredSet->getOperand(2).setImm(Cond[1].getImm());
|
|
|
|
BuildMI(&MBB, DL, get(AMDGPU::JUMP_COND))
|
|
.addMBB(TBB)
|
|
.addReg(AMDGPU::PREDICATE_BIT, RegState::Kill);
|
|
MachineBasicBlock::iterator CfAlu = FindLastAluClause(MBB);
|
|
if (CfAlu == MBB.end())
|
|
return 1;
|
|
assert (CfAlu->getOpcode() == AMDGPU::CF_ALU);
|
|
CfAlu->setDesc(get(AMDGPU::CF_ALU_PUSH_BEFORE));
|
|
return 1;
|
|
}
|
|
} else {
|
|
MachineInstr *PredSet = findFirstPredicateSetterFrom(MBB, MBB.end());
|
|
assert(PredSet && "No previous predicate !");
|
|
addFlag(*PredSet, 0, MO_FLAG_PUSH);
|
|
PredSet->getOperand(2).setImm(Cond[1].getImm());
|
|
BuildMI(&MBB, DL, get(AMDGPU::JUMP_COND))
|
|
.addMBB(TBB)
|
|
.addReg(AMDGPU::PREDICATE_BIT, RegState::Kill);
|
|
BuildMI(&MBB, DL, get(AMDGPU::JUMP)).addMBB(FBB);
|
|
MachineBasicBlock::iterator CfAlu = FindLastAluClause(MBB);
|
|
if (CfAlu == MBB.end())
|
|
return 2;
|
|
assert (CfAlu->getOpcode() == AMDGPU::CF_ALU);
|
|
CfAlu->setDesc(get(AMDGPU::CF_ALU_PUSH_BEFORE));
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
unsigned R600InstrInfo::removeBranch(MachineBasicBlock &MBB,
|
|
int *BytesRemoved) const {
|
|
assert(!BytesRemoved && "code size not handled");
|
|
|
|
// Note : we leave PRED* instructions there.
|
|
// They may be needed when predicating instructions.
|
|
|
|
MachineBasicBlock::iterator I = MBB.end();
|
|
|
|
if (I == MBB.begin()) {
|
|
return 0;
|
|
}
|
|
--I;
|
|
switch (I->getOpcode()) {
|
|
default:
|
|
return 0;
|
|
case AMDGPU::JUMP_COND: {
|
|
MachineInstr *predSet = findFirstPredicateSetterFrom(MBB, I);
|
|
clearFlag(*predSet, 0, MO_FLAG_PUSH);
|
|
I->eraseFromParent();
|
|
MachineBasicBlock::iterator CfAlu = FindLastAluClause(MBB);
|
|
if (CfAlu == MBB.end())
|
|
break;
|
|
assert (CfAlu->getOpcode() == AMDGPU::CF_ALU_PUSH_BEFORE);
|
|
CfAlu->setDesc(get(AMDGPU::CF_ALU));
|
|
break;
|
|
}
|
|
case AMDGPU::JUMP:
|
|
I->eraseFromParent();
|
|
break;
|
|
}
|
|
I = MBB.end();
|
|
|
|
if (I == MBB.begin()) {
|
|
return 1;
|
|
}
|
|
--I;
|
|
switch (I->getOpcode()) {
|
|
// FIXME: only one case??
|
|
default:
|
|
return 1;
|
|
case AMDGPU::JUMP_COND: {
|
|
MachineInstr *predSet = findFirstPredicateSetterFrom(MBB, I);
|
|
clearFlag(*predSet, 0, MO_FLAG_PUSH);
|
|
I->eraseFromParent();
|
|
MachineBasicBlock::iterator CfAlu = FindLastAluClause(MBB);
|
|
if (CfAlu == MBB.end())
|
|
break;
|
|
assert (CfAlu->getOpcode() == AMDGPU::CF_ALU_PUSH_BEFORE);
|
|
CfAlu->setDesc(get(AMDGPU::CF_ALU));
|
|
break;
|
|
}
|
|
case AMDGPU::JUMP:
|
|
I->eraseFromParent();
|
|
break;
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
bool R600InstrInfo::isPredicated(const MachineInstr &MI) const {
|
|
int idx = MI.findFirstPredOperandIdx();
|
|
if (idx < 0)
|
|
return false;
|
|
|
|
unsigned Reg = MI.getOperand(idx).getReg();
|
|
switch (Reg) {
|
|
default: return false;
|
|
case AMDGPU::PRED_SEL_ONE:
|
|
case AMDGPU::PRED_SEL_ZERO:
|
|
case AMDGPU::PREDICATE_BIT:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool R600InstrInfo::isPredicable(MachineInstr &MI) const {
|
|
// XXX: KILL* instructions can be predicated, but they must be the last
|
|
// instruction in a clause, so this means any instructions after them cannot
|
|
// be predicated. Until we have proper support for instruction clauses in the
|
|
// backend, we will mark KILL* instructions as unpredicable.
|
|
|
|
if (MI.getOpcode() == AMDGPU::KILLGT) {
|
|
return false;
|
|
} else if (MI.getOpcode() == AMDGPU::CF_ALU) {
|
|
// If the clause start in the middle of MBB then the MBB has more
|
|
// than a single clause, unable to predicate several clauses.
|
|
if (MI.getParent()->begin() != MachineBasicBlock::iterator(MI))
|
|
return false;
|
|
// TODO: We don't support KC merging atm
|
|
return MI.getOperand(3).getImm() == 0 && MI.getOperand(4).getImm() == 0;
|
|
} else if (isVector(MI)) {
|
|
return false;
|
|
} else {
|
|
return AMDGPUInstrInfo::isPredicable(MI);
|
|
}
|
|
}
|
|
|
|
|
|
bool
|
|
R600InstrInfo::isProfitableToIfCvt(MachineBasicBlock &MBB,
|
|
unsigned NumCyles,
|
|
unsigned ExtraPredCycles,
|
|
BranchProbability Probability) const{
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
R600InstrInfo::isProfitableToIfCvt(MachineBasicBlock &TMBB,
|
|
unsigned NumTCycles,
|
|
unsigned ExtraTCycles,
|
|
MachineBasicBlock &FMBB,
|
|
unsigned NumFCycles,
|
|
unsigned ExtraFCycles,
|
|
BranchProbability Probability) const {
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
R600InstrInfo::isProfitableToDupForIfCvt(MachineBasicBlock &MBB,
|
|
unsigned NumCyles,
|
|
BranchProbability Probability)
|
|
const {
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
R600InstrInfo::isProfitableToUnpredicate(MachineBasicBlock &TMBB,
|
|
MachineBasicBlock &FMBB) const {
|
|
return false;
|
|
}
|
|
|
|
|
|
bool
|
|
R600InstrInfo::reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
|
|
MachineOperand &MO = Cond[1];
|
|
switch (MO.getImm()) {
|
|
case AMDGPU::PRED_SETE_INT:
|
|
MO.setImm(AMDGPU::PRED_SETNE_INT);
|
|
break;
|
|
case AMDGPU::PRED_SETNE_INT:
|
|
MO.setImm(AMDGPU::PRED_SETE_INT);
|
|
break;
|
|
case AMDGPU::PRED_SETE:
|
|
MO.setImm(AMDGPU::PRED_SETNE);
|
|
break;
|
|
case AMDGPU::PRED_SETNE:
|
|
MO.setImm(AMDGPU::PRED_SETE);
|
|
break;
|
|
default:
|
|
return true;
|
|
}
|
|
|
|
MachineOperand &MO2 = Cond[2];
|
|
switch (MO2.getReg()) {
|
|
case AMDGPU::PRED_SEL_ZERO:
|
|
MO2.setReg(AMDGPU::PRED_SEL_ONE);
|
|
break;
|
|
case AMDGPU::PRED_SEL_ONE:
|
|
MO2.setReg(AMDGPU::PRED_SEL_ZERO);
|
|
break;
|
|
default:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool R600InstrInfo::DefinesPredicate(MachineInstr &MI,
|
|
std::vector<MachineOperand> &Pred) const {
|
|
return isPredicateSetter(MI.getOpcode());
|
|
}
|
|
|
|
|
|
bool R600InstrInfo::PredicateInstruction(MachineInstr &MI,
|
|
ArrayRef<MachineOperand> Pred) const {
|
|
int PIdx = MI.findFirstPredOperandIdx();
|
|
|
|
if (MI.getOpcode() == AMDGPU::CF_ALU) {
|
|
MI.getOperand(8).setImm(0);
|
|
return true;
|
|
}
|
|
|
|
if (MI.getOpcode() == AMDGPU::DOT_4) {
|
|
MI.getOperand(getOperandIdx(MI, AMDGPU::OpName::pred_sel_X))
|
|
.setReg(Pred[2].getReg());
|
|
MI.getOperand(getOperandIdx(MI, AMDGPU::OpName::pred_sel_Y))
|
|
.setReg(Pred[2].getReg());
|
|
MI.getOperand(getOperandIdx(MI, AMDGPU::OpName::pred_sel_Z))
|
|
.setReg(Pred[2].getReg());
|
|
MI.getOperand(getOperandIdx(MI, AMDGPU::OpName::pred_sel_W))
|
|
.setReg(Pred[2].getReg());
|
|
MachineInstrBuilder MIB(*MI.getParent()->getParent(), MI);
|
|
MIB.addReg(AMDGPU::PREDICATE_BIT, RegState::Implicit);
|
|
return true;
|
|
}
|
|
|
|
if (PIdx != -1) {
|
|
MachineOperand &PMO = MI.getOperand(PIdx);
|
|
PMO.setReg(Pred[2].getReg());
|
|
MachineInstrBuilder MIB(*MI.getParent()->getParent(), MI);
|
|
MIB.addReg(AMDGPU::PREDICATE_BIT, RegState::Implicit);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
unsigned int R600InstrInfo::getPredicationCost(const MachineInstr &) const {
|
|
return 2;
|
|
}
|
|
|
|
unsigned int R600InstrInfo::getInstrLatency(const InstrItineraryData *ItinData,
|
|
const MachineInstr &,
|
|
unsigned *PredCost) const {
|
|
if (PredCost)
|
|
*PredCost = 2;
|
|
return 2;
|
|
}
|
|
|
|
unsigned R600InstrInfo::calculateIndirectAddress(unsigned RegIndex,
|
|
unsigned Channel) const {
|
|
assert(Channel == 0);
|
|
return RegIndex;
|
|
}
|
|
|
|
bool R600InstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
|
|
switch (MI.getOpcode()) {
|
|
default: {
|
|
MachineBasicBlock *MBB = MI.getParent();
|
|
int OffsetOpIdx =
|
|
AMDGPU::getNamedOperandIdx(MI.getOpcode(), AMDGPU::OpName::addr);
|
|
// addr is a custom operand with multiple MI operands, and only the
|
|
// first MI operand is given a name.
|
|
int RegOpIdx = OffsetOpIdx + 1;
|
|
int ChanOpIdx =
|
|
AMDGPU::getNamedOperandIdx(MI.getOpcode(), AMDGPU::OpName::chan);
|
|
if (isRegisterLoad(MI)) {
|
|
int DstOpIdx =
|
|
AMDGPU::getNamedOperandIdx(MI.getOpcode(), AMDGPU::OpName::dst);
|
|
unsigned RegIndex = MI.getOperand(RegOpIdx).getImm();
|
|
unsigned Channel = MI.getOperand(ChanOpIdx).getImm();
|
|
unsigned Address = calculateIndirectAddress(RegIndex, Channel);
|
|
unsigned OffsetReg = MI.getOperand(OffsetOpIdx).getReg();
|
|
if (OffsetReg == AMDGPU::INDIRECT_BASE_ADDR) {
|
|
buildMovInstr(MBB, MI, MI.getOperand(DstOpIdx).getReg(),
|
|
getIndirectAddrRegClass()->getRegister(Address));
|
|
} else {
|
|
buildIndirectRead(MBB, MI, MI.getOperand(DstOpIdx).getReg(), Address,
|
|
OffsetReg);
|
|
}
|
|
} else if (isRegisterStore(MI)) {
|
|
int ValOpIdx =
|
|
AMDGPU::getNamedOperandIdx(MI.getOpcode(), AMDGPU::OpName::val);
|
|
unsigned RegIndex = MI.getOperand(RegOpIdx).getImm();
|
|
unsigned Channel = MI.getOperand(ChanOpIdx).getImm();
|
|
unsigned Address = calculateIndirectAddress(RegIndex, Channel);
|
|
unsigned OffsetReg = MI.getOperand(OffsetOpIdx).getReg();
|
|
if (OffsetReg == AMDGPU::INDIRECT_BASE_ADDR) {
|
|
buildMovInstr(MBB, MI, getIndirectAddrRegClass()->getRegister(Address),
|
|
MI.getOperand(ValOpIdx).getReg());
|
|
} else {
|
|
buildIndirectWrite(MBB, MI, MI.getOperand(ValOpIdx).getReg(),
|
|
calculateIndirectAddress(RegIndex, Channel),
|
|
OffsetReg);
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
MBB->erase(MI);
|
|
return true;
|
|
}
|
|
case AMDGPU::R600_EXTRACT_ELT_V2:
|
|
case AMDGPU::R600_EXTRACT_ELT_V4:
|
|
buildIndirectRead(MI.getParent(), MI, MI.getOperand(0).getReg(),
|
|
RI.getHWRegIndex(MI.getOperand(1).getReg()), // Address
|
|
MI.getOperand(2).getReg(),
|
|
RI.getHWRegChan(MI.getOperand(1).getReg()));
|
|
break;
|
|
case AMDGPU::R600_INSERT_ELT_V2:
|
|
case AMDGPU::R600_INSERT_ELT_V4:
|
|
buildIndirectWrite(MI.getParent(), MI, MI.getOperand(2).getReg(), // Value
|
|
RI.getHWRegIndex(MI.getOperand(1).getReg()), // Address
|
|
MI.getOperand(3).getReg(), // Offset
|
|
RI.getHWRegChan(MI.getOperand(1).getReg())); // Channel
|
|
break;
|
|
}
|
|
MI.eraseFromParent();
|
|
return true;
|
|
}
|
|
|
|
void R600InstrInfo::reserveIndirectRegisters(BitVector &Reserved,
|
|
const MachineFunction &MF) const {
|
|
const R600Subtarget &ST = MF.getSubtarget<R600Subtarget>();
|
|
const R600FrameLowering *TFL = ST.getFrameLowering();
|
|
|
|
unsigned StackWidth = TFL->getStackWidth(MF);
|
|
int End = getIndirectIndexEnd(MF);
|
|
|
|
if (End == -1)
|
|
return;
|
|
|
|
for (int Index = getIndirectIndexBegin(MF); Index <= End; ++Index) {
|
|
unsigned SuperReg = AMDGPU::R600_Reg128RegClass.getRegister(Index);
|
|
Reserved.set(SuperReg);
|
|
for (unsigned Chan = 0; Chan < StackWidth; ++Chan) {
|
|
unsigned Reg = AMDGPU::R600_TReg32RegClass.getRegister((4 * Index) + Chan);
|
|
Reserved.set(Reg);
|
|
}
|
|
}
|
|
}
|
|
|
|
const TargetRegisterClass *R600InstrInfo::getIndirectAddrRegClass() const {
|
|
return &AMDGPU::R600_TReg32_XRegClass;
|
|
}
|
|
|
|
MachineInstrBuilder R600InstrInfo::buildIndirectWrite(MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned ValueReg, unsigned Address,
|
|
unsigned OffsetReg) const {
|
|
return buildIndirectWrite(MBB, I, ValueReg, Address, OffsetReg, 0);
|
|
}
|
|
|
|
MachineInstrBuilder R600InstrInfo::buildIndirectWrite(MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned ValueReg, unsigned Address,
|
|
unsigned OffsetReg,
|
|
unsigned AddrChan) const {
|
|
unsigned AddrReg;
|
|
switch (AddrChan) {
|
|
default: llvm_unreachable("Invalid Channel");
|
|
case 0: AddrReg = AMDGPU::R600_AddrRegClass.getRegister(Address); break;
|
|
case 1: AddrReg = AMDGPU::R600_Addr_YRegClass.getRegister(Address); break;
|
|
case 2: AddrReg = AMDGPU::R600_Addr_ZRegClass.getRegister(Address); break;
|
|
case 3: AddrReg = AMDGPU::R600_Addr_WRegClass.getRegister(Address); break;
|
|
}
|
|
MachineInstr *MOVA = buildDefaultInstruction(*MBB, I, AMDGPU::MOVA_INT_eg,
|
|
AMDGPU::AR_X, OffsetReg);
|
|
setImmOperand(*MOVA, AMDGPU::OpName::write, 0);
|
|
|
|
MachineInstrBuilder Mov = buildDefaultInstruction(*MBB, I, AMDGPU::MOV,
|
|
AddrReg, ValueReg)
|
|
.addReg(AMDGPU::AR_X,
|
|
RegState::Implicit | RegState::Kill);
|
|
setImmOperand(*Mov, AMDGPU::OpName::dst_rel, 1);
|
|
return Mov;
|
|
}
|
|
|
|
MachineInstrBuilder R600InstrInfo::buildIndirectRead(MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned ValueReg, unsigned Address,
|
|
unsigned OffsetReg) const {
|
|
return buildIndirectRead(MBB, I, ValueReg, Address, OffsetReg, 0);
|
|
}
|
|
|
|
MachineInstrBuilder R600InstrInfo::buildIndirectRead(MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned ValueReg, unsigned Address,
|
|
unsigned OffsetReg,
|
|
unsigned AddrChan) const {
|
|
unsigned AddrReg;
|
|
switch (AddrChan) {
|
|
default: llvm_unreachable("Invalid Channel");
|
|
case 0: AddrReg = AMDGPU::R600_AddrRegClass.getRegister(Address); break;
|
|
case 1: AddrReg = AMDGPU::R600_Addr_YRegClass.getRegister(Address); break;
|
|
case 2: AddrReg = AMDGPU::R600_Addr_ZRegClass.getRegister(Address); break;
|
|
case 3: AddrReg = AMDGPU::R600_Addr_WRegClass.getRegister(Address); break;
|
|
}
|
|
MachineInstr *MOVA = buildDefaultInstruction(*MBB, I, AMDGPU::MOVA_INT_eg,
|
|
AMDGPU::AR_X,
|
|
OffsetReg);
|
|
setImmOperand(*MOVA, AMDGPU::OpName::write, 0);
|
|
MachineInstrBuilder Mov = buildDefaultInstruction(*MBB, I, AMDGPU::MOV,
|
|
ValueReg,
|
|
AddrReg)
|
|
.addReg(AMDGPU::AR_X,
|
|
RegState::Implicit | RegState::Kill);
|
|
setImmOperand(*Mov, AMDGPU::OpName::src0_rel, 1);
|
|
|
|
return Mov;
|
|
}
|
|
|
|
int R600InstrInfo::getIndirectIndexBegin(const MachineFunction &MF) const {
|
|
const MachineRegisterInfo &MRI = MF.getRegInfo();
|
|
const MachineFrameInfo &MFI = MF.getFrameInfo();
|
|
int Offset = -1;
|
|
|
|
if (MFI.getNumObjects() == 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (MRI.livein_empty()) {
|
|
return 0;
|
|
}
|
|
|
|
const TargetRegisterClass *IndirectRC = getIndirectAddrRegClass();
|
|
for (MachineRegisterInfo::livein_iterator LI = MRI.livein_begin(),
|
|
LE = MRI.livein_end();
|
|
LI != LE; ++LI) {
|
|
unsigned Reg = LI->first;
|
|
if (TargetRegisterInfo::isVirtualRegister(Reg) ||
|
|
!IndirectRC->contains(Reg))
|
|
continue;
|
|
|
|
unsigned RegIndex;
|
|
unsigned RegEnd;
|
|
for (RegIndex = 0, RegEnd = IndirectRC->getNumRegs(); RegIndex != RegEnd;
|
|
++RegIndex) {
|
|
if (IndirectRC->getRegister(RegIndex) == Reg)
|
|
break;
|
|
}
|
|
Offset = std::max(Offset, (int)RegIndex);
|
|
}
|
|
|
|
return Offset + 1;
|
|
}
|
|
|
|
int R600InstrInfo::getIndirectIndexEnd(const MachineFunction &MF) const {
|
|
int Offset = 0;
|
|
const MachineFrameInfo &MFI = MF.getFrameInfo();
|
|
|
|
// Variable sized objects are not supported
|
|
if (MFI.hasVarSizedObjects()) {
|
|
return -1;
|
|
}
|
|
|
|
if (MFI.getNumObjects() == 0) {
|
|
return -1;
|
|
}
|
|
|
|
const R600Subtarget &ST = MF.getSubtarget<R600Subtarget>();
|
|
const R600FrameLowering *TFL = ST.getFrameLowering();
|
|
|
|
unsigned IgnoredFrameReg;
|
|
Offset = TFL->getFrameIndexReference(MF, -1, IgnoredFrameReg);
|
|
|
|
return getIndirectIndexBegin(MF) + Offset;
|
|
}
|
|
|
|
unsigned R600InstrInfo::getMaxAlusPerClause() const {
|
|
return 115;
|
|
}
|
|
|
|
MachineInstrBuilder R600InstrInfo::buildDefaultInstruction(MachineBasicBlock &MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned Opcode,
|
|
unsigned DstReg,
|
|
unsigned Src0Reg,
|
|
unsigned Src1Reg) const {
|
|
MachineInstrBuilder MIB = BuildMI(MBB, I, MBB.findDebugLoc(I), get(Opcode),
|
|
DstReg); // $dst
|
|
|
|
if (Src1Reg) {
|
|
MIB.addImm(0) // $update_exec_mask
|
|
.addImm(0); // $update_predicate
|
|
}
|
|
MIB.addImm(1) // $write
|
|
.addImm(0) // $omod
|
|
.addImm(0) // $dst_rel
|
|
.addImm(0) // $dst_clamp
|
|
.addReg(Src0Reg) // $src0
|
|
.addImm(0) // $src0_neg
|
|
.addImm(0) // $src0_rel
|
|
.addImm(0) // $src0_abs
|
|
.addImm(-1); // $src0_sel
|
|
|
|
if (Src1Reg) {
|
|
MIB.addReg(Src1Reg) // $src1
|
|
.addImm(0) // $src1_neg
|
|
.addImm(0) // $src1_rel
|
|
.addImm(0) // $src1_abs
|
|
.addImm(-1); // $src1_sel
|
|
}
|
|
|
|
//XXX: The r600g finalizer expects this to be 1, once we've moved the
|
|
//scheduling to the backend, we can change the default to 0.
|
|
MIB.addImm(1) // $last
|
|
.addReg(AMDGPU::PRED_SEL_OFF) // $pred_sel
|
|
.addImm(0) // $literal
|
|
.addImm(0); // $bank_swizzle
|
|
|
|
return MIB;
|
|
}
|
|
|
|
#define OPERAND_CASE(Label) \
|
|
case Label: { \
|
|
static const unsigned Ops[] = \
|
|
{ \
|
|
Label##_X, \
|
|
Label##_Y, \
|
|
Label##_Z, \
|
|
Label##_W \
|
|
}; \
|
|
return Ops[Slot]; \
|
|
}
|
|
|
|
static unsigned getSlotedOps(unsigned Op, unsigned Slot) {
|
|
switch (Op) {
|
|
OPERAND_CASE(AMDGPU::OpName::update_exec_mask)
|
|
OPERAND_CASE(AMDGPU::OpName::update_pred)
|
|
OPERAND_CASE(AMDGPU::OpName::write)
|
|
OPERAND_CASE(AMDGPU::OpName::omod)
|
|
OPERAND_CASE(AMDGPU::OpName::dst_rel)
|
|
OPERAND_CASE(AMDGPU::OpName::clamp)
|
|
OPERAND_CASE(AMDGPU::OpName::src0)
|
|
OPERAND_CASE(AMDGPU::OpName::src0_neg)
|
|
OPERAND_CASE(AMDGPU::OpName::src0_rel)
|
|
OPERAND_CASE(AMDGPU::OpName::src0_abs)
|
|
OPERAND_CASE(AMDGPU::OpName::src0_sel)
|
|
OPERAND_CASE(AMDGPU::OpName::src1)
|
|
OPERAND_CASE(AMDGPU::OpName::src1_neg)
|
|
OPERAND_CASE(AMDGPU::OpName::src1_rel)
|
|
OPERAND_CASE(AMDGPU::OpName::src1_abs)
|
|
OPERAND_CASE(AMDGPU::OpName::src1_sel)
|
|
OPERAND_CASE(AMDGPU::OpName::pred_sel)
|
|
default:
|
|
llvm_unreachable("Wrong Operand");
|
|
}
|
|
}
|
|
|
|
#undef OPERAND_CASE
|
|
|
|
MachineInstr *R600InstrInfo::buildSlotOfVectorInstruction(
|
|
MachineBasicBlock &MBB, MachineInstr *MI, unsigned Slot, unsigned DstReg)
|
|
const {
|
|
assert (MI->getOpcode() == AMDGPU::DOT_4 && "Not Implemented");
|
|
unsigned Opcode;
|
|
if (ST.getGeneration() <= R600Subtarget::R700)
|
|
Opcode = AMDGPU::DOT4_r600;
|
|
else
|
|
Opcode = AMDGPU::DOT4_eg;
|
|
MachineBasicBlock::iterator I = MI;
|
|
MachineOperand &Src0 = MI->getOperand(
|
|
getOperandIdx(MI->getOpcode(), getSlotedOps(AMDGPU::OpName::src0, Slot)));
|
|
MachineOperand &Src1 = MI->getOperand(
|
|
getOperandIdx(MI->getOpcode(), getSlotedOps(AMDGPU::OpName::src1, Slot)));
|
|
MachineInstr *MIB = buildDefaultInstruction(
|
|
MBB, I, Opcode, DstReg, Src0.getReg(), Src1.getReg());
|
|
static const unsigned Operands[14] = {
|
|
AMDGPU::OpName::update_exec_mask,
|
|
AMDGPU::OpName::update_pred,
|
|
AMDGPU::OpName::write,
|
|
AMDGPU::OpName::omod,
|
|
AMDGPU::OpName::dst_rel,
|
|
AMDGPU::OpName::clamp,
|
|
AMDGPU::OpName::src0_neg,
|
|
AMDGPU::OpName::src0_rel,
|
|
AMDGPU::OpName::src0_abs,
|
|
AMDGPU::OpName::src0_sel,
|
|
AMDGPU::OpName::src1_neg,
|
|
AMDGPU::OpName::src1_rel,
|
|
AMDGPU::OpName::src1_abs,
|
|
AMDGPU::OpName::src1_sel,
|
|
};
|
|
|
|
MachineOperand &MO = MI->getOperand(getOperandIdx(MI->getOpcode(),
|
|
getSlotedOps(AMDGPU::OpName::pred_sel, Slot)));
|
|
MIB->getOperand(getOperandIdx(Opcode, AMDGPU::OpName::pred_sel))
|
|
.setReg(MO.getReg());
|
|
|
|
for (unsigned i = 0; i < 14; i++) {
|
|
MachineOperand &MO = MI->getOperand(
|
|
getOperandIdx(MI->getOpcode(), getSlotedOps(Operands[i], Slot)));
|
|
assert (MO.isImm());
|
|
setImmOperand(*MIB, Operands[i], MO.getImm());
|
|
}
|
|
MIB->getOperand(20).setImm(0);
|
|
return MIB;
|
|
}
|
|
|
|
MachineInstr *R600InstrInfo::buildMovImm(MachineBasicBlock &BB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned DstReg,
|
|
uint64_t Imm) const {
|
|
MachineInstr *MovImm = buildDefaultInstruction(BB, I, AMDGPU::MOV, DstReg,
|
|
AMDGPU::ALU_LITERAL_X);
|
|
setImmOperand(*MovImm, AMDGPU::OpName::literal, Imm);
|
|
return MovImm;
|
|
}
|
|
|
|
MachineInstr *R600InstrInfo::buildMovInstr(MachineBasicBlock *MBB,
|
|
MachineBasicBlock::iterator I,
|
|
unsigned DstReg, unsigned SrcReg) const {
|
|
return buildDefaultInstruction(*MBB, I, AMDGPU::MOV, DstReg, SrcReg);
|
|
}
|
|
|
|
int R600InstrInfo::getOperandIdx(const MachineInstr &MI, unsigned Op) const {
|
|
return getOperandIdx(MI.getOpcode(), Op);
|
|
}
|
|
|
|
int R600InstrInfo::getOperandIdx(unsigned Opcode, unsigned Op) const {
|
|
return AMDGPU::getNamedOperandIdx(Opcode, Op);
|
|
}
|
|
|
|
void R600InstrInfo::setImmOperand(MachineInstr &MI, unsigned Op,
|
|
int64_t Imm) const {
|
|
int Idx = getOperandIdx(MI, Op);
|
|
assert(Idx != -1 && "Operand not supported for this instruction.");
|
|
assert(MI.getOperand(Idx).isImm());
|
|
MI.getOperand(Idx).setImm(Imm);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Instruction flag getters/setters
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
MachineOperand &R600InstrInfo::getFlagOp(MachineInstr &MI, unsigned SrcIdx,
|
|
unsigned Flag) const {
|
|
unsigned TargetFlags = get(MI.getOpcode()).TSFlags;
|
|
int FlagIndex = 0;
|
|
if (Flag != 0) {
|
|
// If we pass something other than the default value of Flag to this
|
|
// function, it means we are want to set a flag on an instruction
|
|
// that uses native encoding.
|
|
assert(HAS_NATIVE_OPERANDS(TargetFlags));
|
|
bool IsOP3 = (TargetFlags & R600_InstFlag::OP3) == R600_InstFlag::OP3;
|
|
switch (Flag) {
|
|
case MO_FLAG_CLAMP:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::clamp);
|
|
break;
|
|
case MO_FLAG_MASK:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::write);
|
|
break;
|
|
case MO_FLAG_NOT_LAST:
|
|
case MO_FLAG_LAST:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::last);
|
|
break;
|
|
case MO_FLAG_NEG:
|
|
switch (SrcIdx) {
|
|
case 0:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::src0_neg);
|
|
break;
|
|
case 1:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::src1_neg);
|
|
break;
|
|
case 2:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::src2_neg);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case MO_FLAG_ABS:
|
|
assert(!IsOP3 && "Cannot set absolute value modifier for OP3 "
|
|
"instructions.");
|
|
(void)IsOP3;
|
|
switch (SrcIdx) {
|
|
case 0:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::src0_abs);
|
|
break;
|
|
case 1:
|
|
FlagIndex = getOperandIdx(MI, AMDGPU::OpName::src1_abs);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
FlagIndex = -1;
|
|
break;
|
|
}
|
|
assert(FlagIndex != -1 && "Flag not supported for this instruction");
|
|
} else {
|
|
FlagIndex = GET_FLAG_OPERAND_IDX(TargetFlags);
|
|
assert(FlagIndex != 0 &&
|
|
"Instruction flags not supported for this instruction");
|
|
}
|
|
|
|
MachineOperand &FlagOp = MI.getOperand(FlagIndex);
|
|
assert(FlagOp.isImm());
|
|
return FlagOp;
|
|
}
|
|
|
|
void R600InstrInfo::addFlag(MachineInstr &MI, unsigned Operand,
|
|
unsigned Flag) const {
|
|
unsigned TargetFlags = get(MI.getOpcode()).TSFlags;
|
|
if (Flag == 0) {
|
|
return;
|
|
}
|
|
if (HAS_NATIVE_OPERANDS(TargetFlags)) {
|
|
MachineOperand &FlagOp = getFlagOp(MI, Operand, Flag);
|
|
if (Flag == MO_FLAG_NOT_LAST) {
|
|
clearFlag(MI, Operand, MO_FLAG_LAST);
|
|
} else if (Flag == MO_FLAG_MASK) {
|
|
clearFlag(MI, Operand, Flag);
|
|
} else {
|
|
FlagOp.setImm(1);
|
|
}
|
|
} else {
|
|
MachineOperand &FlagOp = getFlagOp(MI, Operand);
|
|
FlagOp.setImm(FlagOp.getImm() | (Flag << (NUM_MO_FLAGS * Operand)));
|
|
}
|
|
}
|
|
|
|
void R600InstrInfo::clearFlag(MachineInstr &MI, unsigned Operand,
|
|
unsigned Flag) const {
|
|
unsigned TargetFlags = get(MI.getOpcode()).TSFlags;
|
|
if (HAS_NATIVE_OPERANDS(TargetFlags)) {
|
|
MachineOperand &FlagOp = getFlagOp(MI, Operand, Flag);
|
|
FlagOp.setImm(0);
|
|
} else {
|
|
MachineOperand &FlagOp = getFlagOp(MI);
|
|
unsigned InstFlags = FlagOp.getImm();
|
|
InstFlags &= ~(Flag << (NUM_MO_FLAGS * Operand));
|
|
FlagOp.setImm(InstFlags);
|
|
}
|
|
}
|