[mips] Handle reading, writing or copying of ccond field of DSP control
register.
- Define pseudo instructions which store or load ccond field of the DSP
control register.
- Emit the pseudos in MipsSEInstrInfo::storeRegToStack and loadRegFromStack.
- Expand the pseudos before callee-scan save.
- Emit instructions RDDSP or WRDSP to copy between ccond field and GPRs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180969 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsSEInstrInfo.cpp b/lib/Target/Mips/MipsSEInstrInfo.cpp
index 2e7048d..a0768e5 100644
--- a/lib/Target/Mips/MipsSEInstrInfo.cpp
+++ b/lib/Target/Mips/MipsSEInstrInfo.cpp
@@ -103,6 +103,11 @@
Opc = Mips::MFHI_DSP;
else if (Mips::LORegsDSPRegClass.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::CPURegsRegClass.contains(SrcReg)) { // Copy from CPU Reg.
if (Mips::CCRRegClass.contains(DestReg))
@@ -117,6 +122,12 @@
Opc = Mips::MTHI_DSP;
else if (Mips::LORegsDSPRegClass.contains(DestReg))
Opc = Mips::MTLO_DSP;
+ else if (Mips::DSPCCRegClass.contains(DestReg)) {
+ BuildMI(MBB, I, DL, get(Mips::WRDSP))
+ .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1 << 4)
+ .addReg(DestReg, RegState::ImplicitDefine);
+ return;
+ }
}
else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
Opc = Mips::FMOV_S;
@@ -180,6 +191,8 @@
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;
+ else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
+ Opc = IsN64 ? Mips::STORE_CCOND_DSP_P8 : Mips::STORE_CCOND_DSP;
else if (Mips::FGR32RegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::SWC1_P8 : Mips::SWC1;
else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
@@ -211,6 +224,8 @@
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;
+ else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
+ Opc = IsN64 ? Mips::LOAD_CCOND_DSP_P8 : Mips::LOAD_CCOND_DSP;
else if (Mips::FGR32RegClass.hasSubClassEq(RC))
Opc = IsN64 ? Mips::LWC1_P8 : Mips::LWC1;
else if (Mips::AFGR64RegClass.hasSubClassEq(RC))