aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Target/Mips/MipsSEFrameLowering.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Target/Mips/MipsSEFrameLowering.cpp')
-rw-r--r--lib/Target/Mips/MipsSEFrameLowering.cpp93
1 files changed, 50 insertions, 43 deletions
diff --git a/lib/Target/Mips/MipsSEFrameLowering.cpp b/lib/Target/Mips/MipsSEFrameLowering.cpp
index d9e0fa4..33ed4b3 100644
--- a/lib/Target/Mips/MipsSEFrameLowering.cpp
+++ b/lib/Target/Mips/MipsSEFrameLowering.cpp
@@ -32,6 +32,21 @@ using namespace llvm;
namespace {
typedef MachineBasicBlock::iterator Iter;
+static std::pair<unsigned, unsigned> getMFHiLoOpc(unsigned Src) {
+ if (Mips::ACC64RegClass.contains(Src))
+ return std::make_pair((unsigned)Mips::PseudoMFHI,
+ (unsigned)Mips::PseudoMFLO);
+
+ if (Mips::ACC64DSPRegClass.contains(Src))
+ return std::make_pair((unsigned)Mips::MFHI_DSP, (unsigned)Mips::MFLO_DSP);
+
+ if (Mips::ACC128RegClass.contains(Src))
+ return std::make_pair((unsigned)Mips::PseudoMFHI64,
+ (unsigned)Mips::PseudoMFLO64);
+
+ return std::make_pair(0, 0);
+}
+
/// Helper class to expand pseudos.
class ExpandPseudo {
public:
@@ -43,10 +58,11 @@ private:
void expandLoadCCond(MachineBasicBlock &MBB, Iter I);
void expandStoreCCond(MachineBasicBlock &MBB, Iter I);
void expandLoadACC(MachineBasicBlock &MBB, Iter I, unsigned RegSize);
- void expandStoreACC(MachineBasicBlock &MBB, Iter I, unsigned RegSize);
+ void expandStoreACC(MachineBasicBlock &MBB, Iter I, unsigned MFHiOpc,
+ unsigned MFLoOpc, unsigned RegSize);
bool expandCopy(MachineBasicBlock &MBB, Iter I);
- bool expandCopyACC(MachineBasicBlock &MBB, Iter I, unsigned Dst,
- unsigned Src, unsigned RegSize);
+ bool expandCopyACC(MachineBasicBlock &MBB, Iter I, unsigned MFHiOpc,
+ unsigned MFLoOpc);
MachineFunction &MF;
MachineRegisterInfo &MRI;
@@ -70,32 +86,26 @@ bool ExpandPseudo::expand() {
bool ExpandPseudo::expandInstr(MachineBasicBlock &MBB, Iter I) {
switch(I->getOpcode()) {
case Mips::LOAD_CCOND_DSP:
- case Mips::LOAD_CCOND_DSP_P8:
expandLoadCCond(MBB, I);
break;
case Mips::STORE_CCOND_DSP:
- case Mips::STORE_CCOND_DSP_P8:
expandStoreCCond(MBB, I);
break;
- case Mips::LOAD_AC64:
- case Mips::LOAD_AC64_P8:
- case Mips::LOAD_AC_DSP:
- case Mips::LOAD_AC_DSP_P8:
+ case Mips::LOAD_ACC64:
+ case Mips::LOAD_ACC64DSP:
expandLoadACC(MBB, I, 4);
break;
- case Mips::LOAD_AC128:
- case Mips::LOAD_AC128_P8:
+ case Mips::LOAD_ACC128:
expandLoadACC(MBB, I, 8);
break;
- case Mips::STORE_AC64:
- case Mips::STORE_AC64_P8:
- case Mips::STORE_AC_DSP:
- case Mips::STORE_AC_DSP_P8:
- expandStoreACC(MBB, I, 4);
+ case Mips::STORE_ACC64:
+ expandStoreACC(MBB, I, Mips::PseudoMFHI, Mips::PseudoMFLO, 4);
+ break;
+ case Mips::STORE_ACC64DSP:
+ expandStoreACC(MBB, I, Mips::MFHI_DSP, Mips::MFLO_DSP, 4);
break;
- case Mips::STORE_AC128:
- case Mips::STORE_AC128_P8:
- expandStoreACC(MBB, I, 8);
+ case Mips::STORE_ACC128:
+ expandStoreACC(MBB, I, Mips::PseudoMFHI64, Mips::PseudoMFLO64, 8);
break;
case TargetOpcode::COPY:
if (!expandCopy(MBB, I))
@@ -179,10 +189,11 @@ void ExpandPseudo::expandLoadACC(MachineBasicBlock &MBB, Iter I,
}
void ExpandPseudo::expandStoreACC(MachineBasicBlock &MBB, Iter I,
+ unsigned MFHiOpc, unsigned MFLoOpc,
unsigned RegSize) {
- // copy $vr0, lo
+ // mflo $vr0, src
// store $vr0, FI
- // copy $vr1, hi
+ // mfhi $vr1, src
// store $vr1, FI + 4
assert(I->getOperand(0).isReg() && I->getOperand(1).isFI());
@@ -197,33 +208,29 @@ void ExpandPseudo::expandStoreACC(MachineBasicBlock &MBB, Iter I,
unsigned VR1 = MRI.createVirtualRegister(RC);
unsigned Src = I->getOperand(0).getReg(), FI = I->getOperand(1).getIndex();
unsigned SrcKill = getKillRegState(I->getOperand(0).isKill());
- unsigned Lo = RegInfo.getSubReg(Src, Mips::sub_lo);
- unsigned Hi = RegInfo.getSubReg(Src, Mips::sub_hi);
DebugLoc DL = I->getDebugLoc();
- BuildMI(MBB, I, DL, TII.get(TargetOpcode::COPY), VR0).addReg(Lo, SrcKill);
+ BuildMI(MBB, I, DL, TII.get(MFLoOpc), VR0).addReg(Src);
TII.storeRegToStack(MBB, I, VR0, true, FI, RC, &RegInfo, 0);
- BuildMI(MBB, I, DL, TII.get(TargetOpcode::COPY), VR1).addReg(Hi, SrcKill);
+ BuildMI(MBB, I, DL, TII.get(MFHiOpc), VR1).addReg(Src, SrcKill);
TII.storeRegToStack(MBB, I, VR1, true, FI, RC, &RegInfo, RegSize);
}
bool ExpandPseudo::expandCopy(MachineBasicBlock &MBB, Iter I) {
- unsigned Dst = I->getOperand(0).getReg(), Src = I->getOperand(1).getReg();
-
- if (Mips::ACRegsDSPRegClass.contains(Dst, Src))
- return expandCopyACC(MBB, I, Dst, Src, 4);
+ unsigned Src = I->getOperand(1).getReg();
+ std::pair<unsigned, unsigned> Opcodes = getMFHiLoOpc(Src);
- if (Mips::ACRegs128RegClass.contains(Dst, Src))
- return expandCopyACC(MBB, I, Dst, Src, 8);
+ if (!Opcodes.first)
+ return false;
- return false;
+ return expandCopyACC(MBB, I, Opcodes.first, Opcodes.second);
}
-bool ExpandPseudo::expandCopyACC(MachineBasicBlock &MBB, Iter I, unsigned Dst,
- unsigned Src, unsigned RegSize) {
- // copy $vr0, src_lo
+bool ExpandPseudo::expandCopyACC(MachineBasicBlock &MBB, Iter I,
+ unsigned MFHiOpc, unsigned MFLoOpc) {
+ // mflo $vr0, src
// copy dst_lo, $vr0
- // copy $vr1, src_hi
+ // mfhi $vr1, src
// copy dst_hi, $vr1
const MipsSEInstrInfo &TII =
@@ -231,20 +238,20 @@ bool ExpandPseudo::expandCopyACC(MachineBasicBlock &MBB, Iter I, unsigned Dst,
const MipsRegisterInfo &RegInfo =
*static_cast<const MipsRegisterInfo*>(MF.getTarget().getRegisterInfo());
- const TargetRegisterClass *RC = RegInfo.intRegClass(RegSize);
+ unsigned Dst = I->getOperand(0).getReg(), Src = I->getOperand(1).getReg();
+ unsigned VRegSize = RegInfo.getMinimalPhysRegClass(Dst)->getSize() / 2;
+ const TargetRegisterClass *RC = RegInfo.intRegClass(VRegSize);
unsigned VR0 = MRI.createVirtualRegister(RC);
unsigned VR1 = MRI.createVirtualRegister(RC);
unsigned SrcKill = getKillRegState(I->getOperand(1).isKill());
unsigned DstLo = RegInfo.getSubReg(Dst, Mips::sub_lo);
unsigned DstHi = RegInfo.getSubReg(Dst, Mips::sub_hi);
- unsigned SrcLo = RegInfo.getSubReg(Src, Mips::sub_lo);
- unsigned SrcHi = RegInfo.getSubReg(Src, Mips::sub_hi);
DebugLoc DL = I->getDebugLoc();
- BuildMI(MBB, I, DL, TII.get(TargetOpcode::COPY), VR0).addReg(SrcLo, SrcKill);
+ BuildMI(MBB, I, DL, TII.get(MFLoOpc), VR0).addReg(Src);
BuildMI(MBB, I, DL, TII.get(TargetOpcode::COPY), DstLo)
.addReg(VR0, RegState::Kill);
- BuildMI(MBB, I, DL, TII.get(TargetOpcode::COPY), VR1).addReg(SrcHi, SrcKill);
+ BuildMI(MBB, I, DL, TII.get(MFHiOpc), VR1).addReg(Src, SrcKill);
BuildMI(MBB, I, DL, TII.get(TargetOpcode::COPY), DstHi)
.addReg(VR1, RegState::Kill);
return true;
@@ -321,9 +328,9 @@ void MipsSEFrameLowering::emitPrologue(MachineFunction &MF) const {
// one for each of the paired single precision registers.
if (Mips::AFGR64RegClass.contains(Reg)) {
unsigned Reg0 =
- MRI->getDwarfRegNum(RegInfo.getSubReg(Reg, Mips::sub_fpeven), true);
+ MRI->getDwarfRegNum(RegInfo.getSubReg(Reg, Mips::sub_lo), true);
unsigned Reg1 =
- MRI->getDwarfRegNum(RegInfo.getSubReg(Reg, Mips::sub_fpodd), true);
+ MRI->getDwarfRegNum(RegInfo.getSubReg(Reg, Mips::sub_hi), true);
if (!STI.isLittle())
std::swap(Reg0, Reg1);
generated by cgit v1.1 at 2024-06-07 16:40:31 +0000