Set shift amount to Extend
Implement ISD::FABS and ISD::FNEG nodes
Implement SHL_PARTS, SRL_PARTS, and SRA_PARTS
Generate PowerPC 'fneg', 'fabs', and 'fnabs' instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21018 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index 751b553..97f40f3 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -54,10 +54,7 @@
setOperationAction(ISD::SEXTLOAD, MVT::i1, Expand);
setOperationAction(ISD::SEXTLOAD, MVT::i8, Expand);
- // We don't support these yet.
- setOperationAction(ISD::FNEG , MVT::f64 , Expand);
- setOperationAction(ISD::FABS , MVT::f64 , Expand);
-
+ setShiftAmountFlavor(Extend); // shl X, 32 == 0
addLegalFPImmediate(+0.0); // Necessary for FSEL
addLegalFPImmediate(-0.0); //
@@ -762,7 +759,22 @@
.addMBB(copy0MBB).addReg(TrueValue).addMBB(thisMBB);
return Result;
}
+
+ case ISD::FNEG:
+ if (ISD::FABS == N.getOperand(0).getOpcode()) {
+ Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
+ BuildMI(BB, PPC::FNABS, 1, Result).addReg(Tmp1);
+ } else {
+ Tmp1 = SelectExpr(N.getOperand(0));
+ BuildMI(BB, PPC::FNEG, 1, Result).addReg(Tmp1);
+ }
+ return Result;
+ case ISD::FABS:
+ Tmp1 = SelectExpr(N.getOperand(0));
+ BuildMI(BB, PPC::FABS, 1, Result).addReg(Tmp1);
+ return Result;
+
case ISD::FP_ROUND:
assert (DestType == MVT::f32 &&
N.getOperand(0).getValueType() == MVT::f64 &&
@@ -874,29 +886,34 @@
unsigned &Reg = ExprMap[N];
if (Reg) return Reg;
- if (N.getOpcode() != ISD::CALL && N.getOpcode() != ISD::ADD_PARTS &&
- N.getOpcode() != ISD::SUB_PARTS)
+ switch (N.getOpcode()) {
+ default:
Reg = Result = (N.getValueType() != MVT::Other) ?
- MakeReg(N.getValueType()) : 1;
- else {
+ MakeReg(N.getValueType()) : 1;
+ break;
+ case ISD::CALL:
// If this is a call instruction, make sure to prepare ALL of the result
// values as well as the chain.
- if (N.getOpcode() == ISD::CALL) {
- if (Node->getNumValues() == 1)
- Reg = Result = 1; // Void call, just a chain.
- else {
- Result = MakeReg(Node->getValueType(0));
- ExprMap[N.getValue(0)] = Result;
- for (unsigned i = 1, e = N.Val->getNumValues()-1; i != e; ++i)
- ExprMap[N.getValue(i)] = MakeReg(Node->getValueType(i));
- ExprMap[SDOperand(Node, Node->getNumValues()-1)] = 1;
- }
- } else {
+ if (Node->getNumValues() == 1)
+ Reg = Result = 1; // Void call, just a chain.
+ else {
Result = MakeReg(Node->getValueType(0));
ExprMap[N.getValue(0)] = Result;
- for (unsigned i = 1, e = N.Val->getNumValues(); i != e; ++i)
+ for (unsigned i = 1, e = N.Val->getNumValues()-1; i != e; ++i)
ExprMap[N.getValue(i)] = MakeReg(Node->getValueType(i));
+ ExprMap[SDOperand(Node, Node->getNumValues()-1)] = 1;
}
+ break;
+ case ISD::ADD_PARTS:
+ case ISD::SUB_PARTS:
+ case ISD::SHL_PARTS:
+ case ISD::SRL_PARTS:
+ case ISD::SRA_PARTS:
+ Result = MakeReg(Node->getValueType(0));
+ ExprMap[N.getValue(0)] = Result;
+ for (unsigned i = 1, e = N.Val->getNumValues(); i != e; ++i)
+ ExprMap[N.getValue(i)] = MakeReg(Node->getValueType(i));
+ break;
}
if (DestType == MVT::f64 || DestType == MVT::f32)
@@ -1265,11 +1282,71 @@
for (unsigned i = 0, e = N.getNumOperands(); i != e; ++i)
InVals.push_back(SelectExpr(N.getOperand(i)));
if (N.getOpcode() == ISD::ADD_PARTS) {
- BuildMI(BB, PPC::ADDC, 2, Result+1).addReg(InVals[0]).addReg(InVals[2]);
- BuildMI(BB, PPC::ADDE, 2, Result).addReg(InVals[1]).addReg(InVals[3]);
+ BuildMI(BB, PPC::ADDC, 2, Result).addReg(InVals[0]).addReg(InVals[2]);
+ BuildMI(BB, PPC::ADDE, 2, Result+1).addReg(InVals[1]).addReg(InVals[3]);
} else {
- BuildMI(BB, PPC::SUBFC, 2, Result+1).addReg(InVals[2]).addReg(InVals[0]);
- BuildMI(BB, PPC::SUBFE, 2, Result).addReg(InVals[3]).addReg(InVals[1]);
+ BuildMI(BB, PPC::SUBFC, 2, Result).addReg(InVals[2]).addReg(InVals[0]);
+ BuildMI(BB, PPC::SUBFE, 2, Result+1).addReg(InVals[3]).addReg(InVals[1]);
+ }
+ return Result+N.ResNo;
+ }
+
+ case ISD::SHL_PARTS:
+ case ISD::SRA_PARTS:
+ case ISD::SRL_PARTS: {
+ assert(N.getNumOperands() == 3 && N.getValueType() == MVT::i32 &&
+ "Not an i64 shift!");
+ unsigned ShiftOpLo = SelectExpr(N.getOperand(0));
+ unsigned ShiftOpHi = SelectExpr(N.getOperand(1));
+ unsigned SHReg = SelectExpr(N.getOperand(2));
+ Tmp1 = MakeReg(MVT::i32);
+ Tmp2 = MakeReg(MVT::i32);
+ Tmp3 = MakeReg(MVT::i32);
+ unsigned Tmp4 = MakeReg(MVT::i32);
+ unsigned Tmp5 = MakeReg(MVT::i32);
+ unsigned Tmp6 = MakeReg(MVT::i32);
+ BuildMI(BB, PPC::SUBFIC, 2, Tmp1).addReg(SHReg).addSImm(32);
+ if (ISD::SHL_PARTS == opcode) {
+ BuildMI(BB, PPC::SLW, 2, Tmp2).addReg(ShiftOpHi).addReg(SHReg);
+ BuildMI(BB, PPC::SRW, 2, Tmp3).addReg(ShiftOpLo).addReg(Tmp1);
+ BuildMI(BB, PPC::OR, 2, Tmp4).addReg(Tmp2).addReg(Tmp3);
+ BuildMI(BB, PPC::ADDI, 2, Tmp5).addReg(SHReg).addSImm(-32);
+ BuildMI(BB, PPC::SLW, 2, Tmp6).addReg(ShiftOpHi).addReg(Tmp5);
+ BuildMI(BB, PPC::OR, 2, Result+1).addReg(Tmp4).addReg(Tmp6);
+ BuildMI(BB, PPC::SLW, 2, Result).addReg(ShiftOpLo).addReg(SHReg);
+ } else if (ISD::SRL_PARTS == opcode) {
+ BuildMI(BB, PPC::SRW, 2, Tmp2).addReg(ShiftOpLo).addReg(SHReg);
+ BuildMI(BB, PPC::SLW, 2, Tmp3).addReg(ShiftOpHi).addReg(Tmp1);
+ BuildMI(BB, PPC::OR, 2, Tmp4).addReg(Tmp2).addReg(Tmp3);
+ BuildMI(BB, PPC::ADDI, 2, Tmp5).addReg(SHReg).addSImm(-32);
+ BuildMI(BB, PPC::SRW, 2, Tmp6).addReg(ShiftOpHi).addReg(Tmp5);
+ BuildMI(BB, PPC::OR, 2, Result).addReg(Tmp4).addReg(Tmp6);
+ BuildMI(BB, PPC::SRW, 2, Result+1).addReg(ShiftOpHi).addReg(SHReg);
+ } else {
+ MachineBasicBlock *TmpMBB = new MachineBasicBlock(BB->getBasicBlock());
+ MachineBasicBlock *PhiMBB = new MachineBasicBlock(BB->getBasicBlock());
+ MachineBasicBlock *OldMBB = BB;
+ MachineFunction *F = BB->getParent();
+ ilist<MachineBasicBlock>::iterator It = BB; ++It;
+ F->getBasicBlockList().insert(It, TmpMBB);
+ F->getBasicBlockList().insert(It, PhiMBB);
+ BB->addSuccessor(TmpMBB);
+ BB->addSuccessor(PhiMBB);
+ BuildMI(BB, PPC::SRW, 2, Tmp2).addReg(ShiftOpLo).addReg(SHReg);
+ BuildMI(BB, PPC::SLW, 2, Tmp3).addReg(ShiftOpHi).addReg(Tmp1);
+ BuildMI(BB, PPC::OR, 2, Tmp4).addReg(Tmp2).addReg(Tmp3);
+ BuildMI(BB, PPC::ADDICo, 2, Tmp5).addReg(SHReg).addSImm(-32);
+ BuildMI(BB, PPC::SRAW, 2, Tmp6).addReg(ShiftOpHi).addReg(Tmp5);
+ BuildMI(BB, PPC::SRAW, 2, Result+1).addReg(ShiftOpHi).addReg(SHReg);
+ BuildMI(BB, PPC::BLE, 2).addReg(PPC::CR0).addMBB(PhiMBB);
+ // Select correct least significant half if the shift amount > 32
+ BB = TmpMBB;
+ unsigned Tmp7 = MakeReg(MVT::i32);
+ BuildMI(BB, PPC::OR, 2, Tmp7).addReg(Tmp6).addReg(Tmp6);
+ TmpMBB->addSuccessor(PhiMBB);
+ BB = PhiMBB;
+ BuildMI(BB, PPC::PHI, 4, Result).addReg(Tmp4).addMBB(OldMBB)
+ .addReg(Tmp7).addMBB(TmpMBB);
}
return Result+N.ResNo;
}