X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsSEInstrInfo.cpp;h=02931a3e39ee29160281c64635528e40de5cb8fa;hb=24e5f9652aff7fc28bb3855d12e9d7506b384ad6;hp=4183a7294085a525fbeffe219304a48923ffef93;hpb=6daba286836e6fb2351e7ebc248e18a5c80e8a31;p=oota-llvm.git

diff --git a/lib/Target/Mips/MipsSEInstrInfo.cpp b/lib/Target/Mips/MipsSEInstrInfo.cpp
index 4183a729408..02931a3e39e 100644
--- a/lib/Target/Mips/MipsSEInstrInfo.cpp
+++ b/lib/Target/Mips/MipsSEInstrInfo.cpp
@@ -18,6 +18,7 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/TargetRegistry.h"
 
@@ -26,7 +27,7 @@ using namespace llvm;
 MipsSEInstrInfo::MipsSEInstrInfo(MipsTargetMachine &tm)
   : MipsInstrInfo(tm,
                   tm.getRelocationModel() == Reloc::PIC_ ? Mips::B : Mips::J),
-    RI(*tm.getSubtargetImpl(), *this),
+    RI(*tm.getSubtargetImpl()),
     IsN64(tm.getSubtarget<MipsSubtarget>().isABI_N64()) {}
 
 const MipsRegisterInfo &MipsSEInstrInfo::getRegisterInfo() const {
@@ -43,10 +44,8 @@ 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 ((Opc == Mips::LW)   || (Opc == Mips::LD)   ||
+      (Opc == Mips::LWC1) || (Opc == Mips::LDC1) || (Opc == Mips::LDC164)) {
     if ((MI->getOperand(1).isFI()) && // is a stack slot
         (MI->getOperand(2).isImm()) &&  // the imm is zero
         (isZeroImm(MI->getOperand(2)))) {
@@ -68,10 +67,8 @@ 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 ((Opc == Mips::SW)   || (Opc == Mips::SD)   ||
+      (Opc == Mips::SWC1) || (Opc == Mips::SDC1) || (Opc == Mips::SDC164)) {
     if ((MI->getOperand(1).isFI()) && // is a stack slot
         (MI->getOperand(2).isImm()) &&  // the imm is zero
         (isZeroImm(MI->getOperand(2)))) {
@@ -88,39 +85,41 @@ void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   bool KillSrc) const {
   unsigned Opc = 0, ZeroReg = 0;
 
-  if (Mips::CPURegsRegClass.contains(DestReg)) { // Copy to CPU Reg.
-    if (Mips::CPURegsRegClass.contains(SrcReg))
-      Opc = Mips::OR, ZeroReg = Mips::ZERO;
+  if (Mips::GPR32RegClass.contains(DestReg)) { // Copy to CPU Reg.
+    if (Mips::GPR32RegClass.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 (Mips::HIRegsRegClass.contains(SrcReg))
+    else if (Mips::HI32RegClass.contains(SrcReg))
       Opc = Mips::MFHI, SrcReg = 0;
-    else if (Mips::LORegsRegClass.contains(SrcReg))
+    else if (Mips::LO32RegClass.contains(SrcReg))
       Opc = Mips::MFLO, SrcReg = 0;
-    else if (Mips::HIRegsDSPRegClass.contains(SrcReg))
+    else if (Mips::HI32DSPRegClass.contains(SrcReg))
       Opc = Mips::MFHI_DSP;
-    else if (Mips::LORegsDSPRegClass.contains(SrcReg))
+    else if (Mips::LO32DSPRegClass.contains(SrcReg))
       Opc = Mips::MFLO_DSP;
     else if (Mips::DSPCCRegClass.contains(SrcReg)) {
       BuildMI(MBB, I, DL, get(Mips::RDDSP), DestReg).addImm(1 << 4)
         .addReg(SrcReg, RegState::Implicit | getKillRegState(KillSrc));
       return;
     }
+    else if (Mips::MSACtrlRegClass.contains(SrcReg))
+      Opc = Mips::CFCMSA;
   }
-  else if (Mips::CPURegsRegClass.contains(SrcReg)) { // Copy from CPU Reg.
+  else if (Mips::GPR32RegClass.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 (Mips::HIRegsRegClass.contains(DestReg))
+    else if (Mips::HI32RegClass.contains(DestReg))
       Opc = Mips::MTHI, DestReg = 0;
-    else if (Mips::LORegsRegClass.contains(DestReg))
+    else if (Mips::LO32RegClass.contains(DestReg))
       Opc = Mips::MTLO, DestReg = 0;
-    else if (Mips::HIRegsDSPRegClass.contains(DestReg))
+    else if (Mips::HI32DSPRegClass.contains(DestReg))
       Opc = Mips::MTHI_DSP;
-    else if (Mips::LORegsDSPRegClass.contains(DestReg))
+    else if (Mips::LO32DSPRegClass.contains(DestReg))
       Opc = Mips::MTLO_DSP;
     else if (Mips::DSPCCRegClass.contains(DestReg)) {
       BuildMI(MBB, I, DL, get(Mips::WRDSP))
@@ -128,6 +127,8 @@ void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
         .addReg(DestReg, RegState::ImplicitDefine);
       return;
     }
+    else if (Mips::MSACtrlRegClass.contains(DestReg))
+      Opc = Mips::CTCMSA;
   }
   else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
     Opc = Mips::FMOV_S;
@@ -135,26 +136,28 @@ void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     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::OR64, ZeroReg = Mips::ZERO_64;
-    else if (Mips::HIRegs64RegClass.contains(SrcReg))
+  else if (Mips::GPR64RegClass.contains(DestReg)) { // Copy to CPU64 Reg.
+    if (Mips::GPR64RegClass.contains(SrcReg))
+      Opc = Mips::DADDu, ZeroReg = Mips::ZERO_64;
+    else if (Mips::HI64RegClass.contains(SrcReg))
       Opc = Mips::MFHI64, SrcReg = 0;
-    else if (Mips::LORegs64RegClass.contains(SrcReg))
+    else if (Mips::LO64RegClass.contains(SrcReg))
       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 (Mips::HIRegs64RegClass.contains(DestReg))
+  else if (Mips::GPR64RegClass.contains(SrcReg)) { // Copy from CPU64 Reg.
+    if (Mips::HI64RegClass.contains(DestReg))
       Opc = Mips::MTHI64, DestReg = 0;
-    else if (Mips::LORegs64RegClass.contains(DestReg))
+    else if (Mips::LO64RegClass.contains(DestReg))
       Opc = Mips::MTLO64, DestReg = 0;
     else if (Mips::FGR64RegClass.contains(DestReg))
       Opc = Mips::DMTC1;
   }
+  else if (Mips::MSA128BRegClass.contains(DestReg)) { // Copy to MSA reg
+    if (Mips::MSA128BRegClass.contains(SrcReg))
+      Opc = Mips::MOVE_V;
+  }
 
   assert(Opc && "Cannot copy registers");
 
@@ -181,24 +184,32 @@ storeRegToStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
 
   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::ACRegsRegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::STORE_AC64_P8 : Mips::STORE_AC64;
-  else if (Mips::ACRegsDSPRegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::STORE_AC_DSP_P8 : Mips::STORE_AC_DSP;
-  else if (Mips::ACRegs128RegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::STORE_AC128_P8 : Mips::STORE_AC128;
+  if (Mips::GPR32RegClass.hasSubClassEq(RC))
+    Opc = Mips::SW;
+  else if (Mips::GPR64RegClass.hasSubClassEq(RC))
+    Opc = Mips::SD;
+  else if (Mips::ACC64RegClass.hasSubClassEq(RC))
+    Opc = Mips::STORE_ACC64;
+  else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
+    Opc = Mips::STORE_ACC64DSP;
+  else if (Mips::ACC128RegClass.hasSubClassEq(RC))
+    Opc = Mips::STORE_ACC128;
   else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::STORE_CCOND_DSP_P8 : Mips::STORE_CCOND_DSP;
+    Opc = Mips::STORE_CCOND_DSP;
   else if (Mips::FGR32RegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::SWC1_P8 : Mips::SWC1;
+    Opc = Mips::SWC1;
   else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
     Opc = Mips::SDC1;
   else if (Mips::FGR64RegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::SDC164_P8 : Mips::SDC164;
+    Opc = Mips::SDC164;
+  else if (RC->hasType(MVT::v16i8))
+    Opc = Mips::ST_B;
+  else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
+    Opc = Mips::ST_H;
+  else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
+    Opc = Mips::ST_W;
+  else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
+    Opc = Mips::ST_D;
 
   assert(Opc && "Register class not handled!");
   BuildMI(MBB, I, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill))
@@ -214,24 +225,32 @@ loadRegFromStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
   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::ACRegsRegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::LOAD_AC64_P8 : Mips::LOAD_AC64;
-  else if (Mips::ACRegsDSPRegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::LOAD_AC_DSP_P8 : Mips::LOAD_AC_DSP;
-  else if (Mips::ACRegs128RegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::LOAD_AC128_P8 : Mips::LOAD_AC128;
+  if (Mips::GPR32RegClass.hasSubClassEq(RC))
+    Opc = Mips::LW;
+  else if (Mips::GPR64RegClass.hasSubClassEq(RC))
+    Opc = Mips::LD;
+  else if (Mips::ACC64RegClass.hasSubClassEq(RC))
+    Opc = Mips::LOAD_ACC64;
+  else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
+    Opc = Mips::LOAD_ACC64DSP;
+  else if (Mips::ACC128RegClass.hasSubClassEq(RC))
+    Opc = Mips::LOAD_ACC128;
   else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::LOAD_CCOND_DSP_P8 : Mips::LOAD_CCOND_DSP;
+    Opc = Mips::LOAD_CCOND_DSP;
   else if (Mips::FGR32RegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::LWC1_P8 : Mips::LWC1;
+    Opc = Mips::LWC1;
   else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
     Opc = Mips::LDC1;
   else if (Mips::FGR64RegClass.hasSubClassEq(RC))
-    Opc = IsN64 ? Mips::LDC164_P8 : Mips::LDC164;
+    Opc = Mips::LDC164;
+  else if (RC->hasType(MVT::v16i8))
+    Opc = Mips::LD_B;
+  else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
+    Opc = Mips::LD_H;
+  else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
+    Opc = Mips::LD_W;
+  else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
+    Opc = Mips::LD_D;
 
   assert(Opc && "Register class not handled!");
   BuildMI(MBB, I, DL, get(Opc), DestReg).addFrameIndex(FI).addImm(Offset)
@@ -247,11 +266,53 @@ bool MipsSEInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
   case Mips::RetRA:
     expandRetRA(MBB, MI, Mips::RET);
     break;
+  case Mips::PseudoMFHI:
+    expandPseudoMFHiLo(MBB, MI, Mips::MFHI);
+    break;
+  case Mips::PseudoMFLO:
+    expandPseudoMFHiLo(MBB, MI, Mips::MFLO);
+    break;
+  case Mips::PseudoMFHI64:
+    expandPseudoMFHiLo(MBB, MI, Mips::MFHI64);
+    break;
+  case Mips::PseudoMFLO64:
+    expandPseudoMFHiLo(MBB, MI, Mips::MFLO64);
+    break;
+  case Mips::PseudoMTLOHI:
+    expandPseudoMTLoHi(MBB, MI, Mips::MTLO, Mips::MTHI, false);
+    break;
+  case Mips::PseudoMTLOHI64:
+    expandPseudoMTLoHi(MBB, MI, Mips::MTLO64, Mips::MTHI64, false);
+    break;
+  case Mips::PseudoMTLOHI_DSP:
+    expandPseudoMTLoHi(MBB, MI, Mips::MTLO_DSP, Mips::MTHI_DSP, true);
+    break;
+  case Mips::PseudoCVT_S_W:
+    expandCvtFPInt(MBB, MI, Mips::CVT_S_W, Mips::MTC1, false);
+    break;
+  case Mips::PseudoCVT_D32_W:
+    expandCvtFPInt(MBB, MI, Mips::CVT_D32_W, Mips::MTC1, false);
+    break;
+  case Mips::PseudoCVT_S_L:
+    expandCvtFPInt(MBB, MI, Mips::CVT_S_L, Mips::DMTC1, true);
+    break;
+  case Mips::PseudoCVT_D64_W:
+    expandCvtFPInt(MBB, MI, Mips::CVT_D64_W, Mips::MTC1, true);
+    break;
+  case Mips::PseudoCVT_D64_L:
+    expandCvtFPInt(MBB, MI, Mips::CVT_D64_L, Mips::DMTC1, true);
+    break;
   case Mips::BuildPairF64:
-    expandBuildPairF64(MBB, MI);
+    expandBuildPairF64(MBB, MI, false);
+    break;
+  case Mips::BuildPairF64_64:
+    expandBuildPairF64(MBB, MI, true);
     break;
   case Mips::ExtractElementF64:
-    expandExtractElementF64(MBB, MI);
+    expandExtractElementF64(MBB, MI, false);
+    break;
+  case Mips::ExtractElementF64_64:
+    expandExtractElementF64(MBB, MI, true);
     break;
   case Mips::MIPSeh_return32:
   case Mips::MIPSeh_return64:
@@ -315,7 +376,7 @@ MipsSEInstrInfo::loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
   unsigned LUi = STI.isABI_N64() ? Mips::LUi64 : Mips::LUi;
   unsigned ZEROReg = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
   const TargetRegisterClass *RC = STI.isABI_N64() ?
-    &Mips::CPU64RegsRegClass : &Mips::CPURegsRegClass;
+    &Mips::GPR64RegClass : &Mips::GPR32RegClass;
   bool LastInstrIsADDiu = NewImm;
 
   const MipsAnalyzeImmediate::InstSeq &Seq =
@@ -362,35 +423,119 @@ void MipsSEInstrInfo::expandRetRA(MachineBasicBlock &MBB,
   BuildMI(MBB, I, I->getDebugLoc(), get(Opc)).addReg(Mips::RA);
 }
 
+std::pair<bool, bool>
+MipsSEInstrInfo::compareOpndSize(unsigned Opc,
+                                 const MachineFunction &MF) const {
+  const MCInstrDesc &Desc = get(Opc);
+  assert(Desc.NumOperands == 2 && "Unary instruction expected.");
+  const MipsRegisterInfo *RI = &getRegisterInfo();
+  unsigned DstRegSize = getRegClass(Desc, 0, RI, MF)->getSize();
+  unsigned SrcRegSize = getRegClass(Desc, 1, RI, MF)->getSize();
+
+  return std::make_pair(DstRegSize > SrcRegSize, DstRegSize < SrcRegSize);
+}
+
+void MipsSEInstrInfo::expandPseudoMFHiLo(MachineBasicBlock &MBB,
+                                         MachineBasicBlock::iterator I,
+                                         unsigned NewOpc) const {
+  BuildMI(MBB, I, I->getDebugLoc(), get(NewOpc), I->getOperand(0).getReg());
+}
+
+void MipsSEInstrInfo::expandPseudoMTLoHi(MachineBasicBlock &MBB,
+                                         MachineBasicBlock::iterator I,
+                                         unsigned LoOpc,
+                                         unsigned HiOpc,
+                                         bool HasExplicitDef) const {
+  // Expand
+  //  lo_hi pseudomtlohi $gpr0, $gpr1
+  // to these two instructions:
+  //  mtlo $gpr0
+  //  mthi $gpr1
+
+  DebugLoc DL = I->getDebugLoc();
+  const MachineOperand &SrcLo = I->getOperand(1), &SrcHi = I->getOperand(2);
+  MachineInstrBuilder LoInst = BuildMI(MBB, I, DL, get(LoOpc));
+  MachineInstrBuilder HiInst = BuildMI(MBB, I, DL, get(HiOpc));
+  LoInst.addReg(SrcLo.getReg(), getKillRegState(SrcLo.isKill()));
+  HiInst.addReg(SrcHi.getReg(), getKillRegState(SrcHi.isKill()));
+
+  // Add lo/hi registers if the mtlo/hi instructions created have explicit
+  // def registers.
+  if (HasExplicitDef) {
+    unsigned DstReg = I->getOperand(0).getReg();
+    unsigned DstLo = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
+    unsigned DstHi = getRegisterInfo().getSubReg(DstReg, Mips::sub_hi);
+    LoInst.addReg(DstLo, RegState::Define);
+    HiInst.addReg(DstHi, RegState::Define);
+  }
+}
+
+void MipsSEInstrInfo::expandCvtFPInt(MachineBasicBlock &MBB,
+                                     MachineBasicBlock::iterator I,
+                                     unsigned CvtOpc, unsigned MovOpc,
+                                     bool IsI64) const {
+  const MCInstrDesc &CvtDesc = get(CvtOpc), &MovDesc = get(MovOpc);
+  const MachineOperand &Dst = I->getOperand(0), &Src = I->getOperand(1);
+  unsigned DstReg = Dst.getReg(), SrcReg = Src.getReg(), TmpReg = DstReg;
+  unsigned KillSrc =  getKillRegState(Src.isKill());
+  DebugLoc DL = I->getDebugLoc();
+  bool DstIsLarger, SrcIsLarger;
+
+  tie(DstIsLarger, SrcIsLarger) = compareOpndSize(CvtOpc, *MBB.getParent());
+
+  if (DstIsLarger)
+    TmpReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
+
+  if (SrcIsLarger)
+    DstReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
+
+  BuildMI(MBB, I, DL, MovDesc, TmpReg).addReg(SrcReg, KillSrc);
+  BuildMI(MBB, I, DL, CvtDesc, DstReg).addReg(TmpReg, RegState::Kill);
+}
+
 void MipsSEInstrInfo::expandExtractElementF64(MachineBasicBlock &MBB,
-                                          MachineBasicBlock::iterator I) const {
+                                              MachineBasicBlock::iterator I,
+                                              bool FP64) 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 SubIdx = N ? Mips::sub_hi : Mips::sub_lo;
   unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx);
 
-  BuildMI(MBB, I, dl, Mfc1Tdd, DstReg).addReg(SubReg);
+  if (SubIdx == Mips::sub_hi && FP64)
+    BuildMI(MBB, I, dl, get(Mips::MFHC1), DstReg).addReg(SubReg);
+  else
+    BuildMI(MBB, I, dl, get(Mips::MFC1), DstReg).addReg(SubReg);
 }
 
 void MipsSEInstrInfo::expandBuildPairF64(MachineBasicBlock &MBB,
-                                       MachineBasicBlock::iterator I) const {
+                                         MachineBasicBlock::iterator I,
+                                         bool FP64) 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))
+  // For FP32 mode:
+  //   mtc1 Lo, $fp
+  //   mtc1 Hi, $fp + 1
+  // For FP64 mode:
+  //   mtc1 Lo, $fp
+  //   mthc1 Hi, $fp
+
+  BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_lo))
     .addReg(LoReg);
-  BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_fpodd))
-    .addReg(HiReg);
+
+  if (FP64)
+    BuildMI(MBB, I, dl, get(Mips::MTHC1), TRI.getSubReg(DstReg, Mips::sub_hi))
+      .addReg(HiReg);
+  else
+    BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_hi))
+      .addReg(HiReg);
 }
 
 void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
@@ -400,7 +545,6 @@ void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
   // indirect jump to TargetReg
   const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
   unsigned ADDU = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
-  unsigned OR = STI.isABI_N64() ? Mips::OR64 : Mips::OR;
   unsigned JR = STI.isABI_N64() ? Mips::JR64 : Mips::JR;
   unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
   unsigned RA = STI.isABI_N64() ? Mips::RA_64 : Mips::RA;
@@ -409,13 +553,13 @@ void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
   unsigned OffsetReg = I->getOperand(0).getReg();
   unsigned TargetReg = I->getOperand(1).getReg();
 
-  // or   $ra, $v0, $zero
+  // addu $ra, $v0, $zero
   // addu $sp, $sp, $v1
   // jr   $ra
   if (TM.getRelocationModel() == Reloc::PIC_)
-    BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(OR), T9)
+    BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), T9)
         .addReg(TargetReg).addReg(ZERO);
-  BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(OR), RA)
+  BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), RA)
       .addReg(TargetReg).addReg(ZERO);
   BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), SP)
       .addReg(SP).addReg(OffsetReg);