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author | Akira Hatanaka <ahatanaka@mips.com> | 2012-07-31 21:49:49 +0000 |
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committer | Akira Hatanaka <ahatanaka@mips.com> | 2012-07-31 21:49:49 +0000 |
commit | 0bc1adbbc4fdc6d85a671ed70a1bbd345dba445d (patch) | |
tree | bff519453a5ba3fad9afa0ba5a6ed76668e29d64 /lib/Target/Mips/MipsSEInstrInfo.cpp | |
parent | b4f921b1f0ae34d6cfda6034a7d32c73b0738351 (diff) | |
download | external_llvm-0bc1adbbc4fdc6d85a671ed70a1bbd345dba445d.zip external_llvm-0bc1adbbc4fdc6d85a671ed70a1bbd345dba445d.tar.gz external_llvm-0bc1adbbc4fdc6d85a671ed70a1bbd345dba445d.tar.bz2 |
Add definitions of two subclasses of MipsInstrInfo, MipsInstrInfo (for mips16),
and MipsSEInstrInfo (for mips32/64).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161081 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips/MipsSEInstrInfo.cpp')
-rw-r--r-- | lib/Target/Mips/MipsSEInstrInfo.cpp | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsSEInstrInfo.cpp b/lib/Target/Mips/MipsSEInstrInfo.cpp new file mode 100644 index 0000000..668efb7 --- /dev/null +++ b/lib/Target/Mips/MipsSEInstrInfo.cpp @@ -0,0 +1,291 @@ +//===-- MipsSEInstrInfo.cpp - Mips32/64 Instruction Information -----------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the Mips32/64 implementation of the TargetInstrInfo class. +// +//===----------------------------------------------------------------------===// + +#include "MipsSEInstrInfo.h" +#include "MipsTargetMachine.h" +#include "MipsMachineFunction.h" +#include "InstPrinter/MipsInstPrinter.h" +#include "llvm/CodeGen/MachineInstrBuilder.h" +#include "llvm/CodeGen/MachineRegisterInfo.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/TargetRegistry.h" +#include "llvm/ADT/STLExtras.h" + +using namespace llvm; + +MipsSEInstrInfo::MipsSEInstrInfo(MipsTargetMachine &tm) + : MipsInstrInfo(tm, + tm.getRelocationModel() == Reloc::PIC_ ? Mips::B : Mips::J), + IsN64(tm.getSubtarget<MipsSubtarget>().isABI_N64()) {} + +/// isLoadFromStackSlot - If the specified machine instruction is a direct +/// load from a stack slot, return the virtual or physical register number of +/// the destination along with the FrameIndex of the loaded stack slot. If +/// not, return 0. This predicate must return 0 if the instruction has +/// any side effects other than loading from the stack slot. +unsigned MipsSEInstrInfo:: +isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const +{ + unsigned Opc = MI->getOpcode(); + + if ((Opc == Mips::LW) || (Opc == Mips::LW_P8) || (Opc == Mips::LD) || + (Opc == Mips::LD_P8) || (Opc == Mips::LWC1) || (Opc == Mips::LWC1_P8) || + (Opc == Mips::LDC1) || (Opc == Mips::LDC164) || + (Opc == Mips::LDC164_P8)) { + if ((MI->getOperand(1).isFI()) && // is a stack slot + (MI->getOperand(2).isImm()) && // the imm is zero + (isZeroImm(MI->getOperand(2)))) { + FrameIndex = MI->getOperand(1).getIndex(); + return MI->getOperand(0).getReg(); + } + } + + return 0; +} + +/// isStoreToStackSlot - If the specified machine instruction is a direct +/// store to a stack slot, return the virtual or physical register number of +/// the source reg along with the FrameIndex of the loaded stack slot. If +/// not, return 0. This predicate must return 0 if the instruction has +/// any side effects other than storing to the stack slot. +unsigned MipsSEInstrInfo:: +isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const +{ + unsigned Opc = MI->getOpcode(); + + if ((Opc == Mips::SW) || (Opc == Mips::SW_P8) || (Opc == Mips::SD) || + (Opc == Mips::SD_P8) || (Opc == Mips::SWC1) || (Opc == Mips::SWC1_P8) || + (Opc == Mips::SDC1) || (Opc == Mips::SDC164) || + (Opc == Mips::SDC164_P8)) { + if ((MI->getOperand(1).isFI()) && // is a stack slot + (MI->getOperand(2).isImm()) && // the imm is zero + (isZeroImm(MI->getOperand(2)))) { + FrameIndex = MI->getOperand(1).getIndex(); + return MI->getOperand(0).getReg(); + } + } + return 0; +} + +void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, DebugLoc DL, + unsigned DestReg, unsigned SrcReg, + bool KillSrc) const { + unsigned Opc = 0, ZeroReg = 0; + + if (Mips::CPURegsRegClass.contains(DestReg)) { // Copy to CPU Reg. + if (Mips::CPURegsRegClass.contains(SrcReg)) + Opc = Mips::ADDu, ZeroReg = Mips::ZERO; + else if (Mips::CCRRegClass.contains(SrcReg)) + Opc = Mips::CFC1; + else if (Mips::FGR32RegClass.contains(SrcReg)) + Opc = Mips::MFC1; + else if (SrcReg == Mips::HI) + Opc = Mips::MFHI, SrcReg = 0; + else if (SrcReg == Mips::LO) + Opc = Mips::MFLO, SrcReg = 0; + } + else if (Mips::CPURegsRegClass.contains(SrcReg)) { // Copy from CPU Reg. + if (Mips::CCRRegClass.contains(DestReg)) + Opc = Mips::CTC1; + else if (Mips::FGR32RegClass.contains(DestReg)) + Opc = Mips::MTC1; + else if (DestReg == Mips::HI) + Opc = Mips::MTHI, DestReg = 0; + else if (DestReg == Mips::LO) + Opc = Mips::MTLO, DestReg = 0; + } + else if (Mips::FGR32RegClass.contains(DestReg, SrcReg)) + Opc = Mips::FMOV_S; + else if (Mips::AFGR64RegClass.contains(DestReg, SrcReg)) + Opc = Mips::FMOV_D32; + else if (Mips::FGR64RegClass.contains(DestReg, SrcReg)) + Opc = Mips::FMOV_D64; + else if (Mips::CCRRegClass.contains(DestReg, SrcReg)) + Opc = Mips::MOVCCRToCCR; + else if (Mips::CPU64RegsRegClass.contains(DestReg)) { // Copy to CPU64 Reg. + if (Mips::CPU64RegsRegClass.contains(SrcReg)) + Opc = Mips::DADDu, ZeroReg = Mips::ZERO_64; + else if (SrcReg == Mips::HI64) + Opc = Mips::MFHI64, SrcReg = 0; + else if (SrcReg == Mips::LO64) + Opc = Mips::MFLO64, SrcReg = 0; + else if (Mips::FGR64RegClass.contains(SrcReg)) + Opc = Mips::DMFC1; + } + else if (Mips::CPU64RegsRegClass.contains(SrcReg)) { // Copy from CPU64 Reg. + if (DestReg == Mips::HI64) + Opc = Mips::MTHI64, DestReg = 0; + else if (DestReg == Mips::LO64) + Opc = Mips::MTLO64, DestReg = 0; + else if (Mips::FGR64RegClass.contains(DestReg)) + Opc = Mips::DMTC1; + } + + assert(Opc && "Cannot copy registers"); + + MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opc)); + + if (DestReg) + MIB.addReg(DestReg, RegState::Define); + + if (ZeroReg) + MIB.addReg(ZeroReg); + + if (SrcReg) + MIB.addReg(SrcReg, getKillRegState(KillSrc)); +} + +void MipsSEInstrInfo:: +storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, + unsigned SrcReg, bool isKill, int FI, + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const { + DebugLoc DL; + if (I != MBB.end()) DL = I->getDebugLoc(); + MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOStore); + + unsigned Opc = 0; + + if (Mips::CPURegsRegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::SW_P8 : Mips::SW; + else if (Mips::CPU64RegsRegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::SD_P8 : Mips::SD; + else if (Mips::FGR32RegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::SWC1_P8 : Mips::SWC1; + else if (Mips::AFGR64RegClass.hasSubClassEq(RC)) + Opc = Mips::SDC1; + else if (Mips::FGR64RegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::SDC164_P8 : Mips::SDC164; + + assert(Opc && "Register class not handled!"); + BuildMI(MBB, I, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill)) + .addFrameIndex(FI).addImm(0).addMemOperand(MMO); +} + +void MipsSEInstrInfo:: +loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, + unsigned DestReg, int FI, + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const +{ + DebugLoc DL; + if (I != MBB.end()) DL = I->getDebugLoc(); + MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOLoad); + unsigned Opc = 0; + + if (Mips::CPURegsRegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::LW_P8 : Mips::LW; + else if (Mips::CPU64RegsRegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::LD_P8 : Mips::LD; + else if (Mips::FGR32RegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::LWC1_P8 : Mips::LWC1; + else if (Mips::AFGR64RegClass.hasSubClassEq(RC)) + Opc = Mips::LDC1; + else if (Mips::FGR64RegClass.hasSubClassEq(RC)) + Opc = IsN64 ? Mips::LDC164_P8 : Mips::LDC164; + + assert(Opc && "Register class not handled!"); + BuildMI(MBB, I, DL, get(Opc), DestReg).addFrameIndex(FI).addImm(0) + .addMemOperand(MMO); +} + +bool MipsSEInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const { + MachineBasicBlock &MBB = *MI->getParent(); + + switch(MI->getDesc().getOpcode()) { + default: + return false; + case Mips::RetRA: + ExpandRetRA(MBB, MI, Mips::RET); + break; + case Mips::BuildPairF64: + ExpandBuildPairF64(MBB, MI); + break; + case Mips::ExtractElementF64: + ExpandExtractElementF64(MBB, MI); + break; + } + + MBB.erase(MI); + return true; +} + +/// GetOppositeBranchOpc - Return the inverse of the specified +/// opcode, e.g. turning BEQ to BNE. +unsigned MipsSEInstrInfo::GetOppositeBranchOpc(unsigned Opc) const { + switch (Opc) { + default: llvm_unreachable("Illegal opcode!"); + case Mips::BEQ: return Mips::BNE; + case Mips::BNE: return Mips::BEQ; + case Mips::BGTZ: return Mips::BLEZ; + case Mips::BGEZ: return Mips::BLTZ; + case Mips::BLTZ: return Mips::BGEZ; + case Mips::BLEZ: return Mips::BGTZ; + case Mips::BEQ64: return Mips::BNE64; + case Mips::BNE64: return Mips::BEQ64; + case Mips::BGTZ64: return Mips::BLEZ64; + case Mips::BGEZ64: return Mips::BLTZ64; + case Mips::BLTZ64: return Mips::BGEZ64; + case Mips::BLEZ64: return Mips::BGTZ64; + case Mips::BC1T: return Mips::BC1F; + case Mips::BC1F: return Mips::BC1T; + } +} + +unsigned MipsSEInstrInfo::GetAnalyzableBrOpc(unsigned Opc) const { + return (Opc == Mips::BEQ || Opc == Mips::BNE || Opc == Mips::BGTZ || + Opc == Mips::BGEZ || Opc == Mips::BLTZ || Opc == Mips::BLEZ || + Opc == Mips::BEQ64 || Opc == Mips::BNE64 || Opc == Mips::BGTZ64 || + Opc == Mips::BGEZ64 || Opc == Mips::BLTZ64 || Opc == Mips::BLEZ64 || + Opc == Mips::BC1T || Opc == Mips::BC1F || Opc == Mips::B || + Opc == Mips::J) ? + Opc : 0; +} + +void MipsSEInstrInfo::ExpandRetRA(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, + unsigned Opc) const { + BuildMI(MBB, I, I->getDebugLoc(), get(Opc)).addReg(Mips::RA); +} + +void MipsSEInstrInfo::ExpandExtractElementF64(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I) const { + unsigned DstReg = I->getOperand(0).getReg(); + unsigned SrcReg = I->getOperand(1).getReg(); + unsigned N = I->getOperand(2).getImm(); + const MCInstrDesc& Mfc1Tdd = get(Mips::MFC1); + DebugLoc dl = I->getDebugLoc(); + + assert(N < 2 && "Invalid immediate"); + unsigned SubIdx = N ? Mips::sub_fpodd : Mips::sub_fpeven; + unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx); + + BuildMI(MBB, I, dl, Mfc1Tdd, DstReg).addReg(SubReg); +} + +void MipsSEInstrInfo::ExpandBuildPairF64(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I) const { + unsigned DstReg = I->getOperand(0).getReg(); + unsigned LoReg = I->getOperand(1).getReg(), HiReg = I->getOperand(2).getReg(); + const MCInstrDesc& Mtc1Tdd = get(Mips::MTC1); + DebugLoc dl = I->getDebugLoc(); + const TargetRegisterInfo &TRI = getRegisterInfo(); + + // mtc1 Lo, $fp + // mtc1 Hi, $fp + 1 + BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_fpeven)) + .addReg(LoReg); + BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_fpodd)) + .addReg(HiReg); +} |