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added ugly support for fp compares

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20049 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth 2005-02-05 13:19:12 +00:00
parent 2a8350a25c
commit 9818c05bb8
2 changed files with 71 additions and 23 deletions
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84
lib/Target/Alpha/AlphaISelPattern.cpp
View File

@ -58,12 +58,14 @@ namespace {
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand); //what is the sign expansion of 1? 1 or -1?
setOperationAction(ISD::SREM, MVT::f32, Expand);
setOperationAction(ISD::SREM, MVT::f64, Expand);
setOperationAction(ISD::SREM , MVT::f32 , Expand);
setOperationAction(ISD::SREM , MVT::f64 , Expand);
setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
setOperationAction(ISD::MEMSET , MVT::Other, Expand);
setOperationAction(ISD::MEMCPY , MVT::Other, Expand);
setOperationAction(ISD::MEMSET , MVT::Other, Expand);
setOperationAction(ISD::MEMCPY , MVT::Other, Expand);
setOperationAction(ISD::SETCC , MVT::f32 , Promote);
computeRegisterProperties();
@ -312,6 +314,16 @@ unsigned ISel::SelectExprFP(SDOperand N, unsigned Result)
Node->dump();
assert(0 && "Node not handled!\n");
case ISD::SELECT:
{
Tmp1 = SelectExpr(N.getOperand(0)); //Cond
Tmp2 = SelectExpr(N.getOperand(1)); //Use if TRUE
Tmp3 = SelectExpr(N.getOperand(2)); //Use if FALSE
// Get the condition into the zero flag.
BuildMI(BB, Alpha::CMOVEQ, 2, Result).addReg(Tmp2).addReg(Tmp3).addReg(Tmp1);
return Result;
}
case ISD::FP_ROUND:
assert (DestType == MVT::f32 && N.getOperand(0).getValueType() == MVT::f64 && "only f64 to f32 conversion supported here");
Tmp1 = SelectExpr(N.getOperand(0));
@ -797,7 +809,7 @@ unsigned ISel::SelectExpr(SDOperand N) {
bool isConst1 = false;
bool isConst2 = false;
int dir;
//Tmp1 = SelectExpr(N.getOperand(0));
if(N.getOperand(0).getOpcode() == ISD::Constant &&
cast<ConstantSDNode>(N.getOperand(0))->getValue() <= 255)
@ -862,19 +874,54 @@ unsigned ISel::SelectExpr(SDOperand N) {
Tmp2 = SelectExpr(N.getOperand(1));
BuildMI(BB, Alpha::CMPEQ, 2, Result).addReg(Tmp1).addReg(Tmp2);
}
}
}
else
{
Node->dump();
assert(0 && "only integer");
}
}
} else {
bool rev = false;
bool inv = false;
switch (SetCC->getCondition()) {
default: Node->dump(); assert(0 && "Unknown FP comparison!");
case ISD::SETEQ: Opc = Alpha::CMPTEQ; break;
case ISD::SETLT: Opc = Alpha::CMPTLT; break;
case ISD::SETLE: Opc = Alpha::CMPTLE; break;
case ISD::SETGT: Opc = Alpha::CMPTLT; rev = true; break;
case ISD::SETGE: Opc = Alpha::CMPTLE; rev = true; break;
case ISD::SETNE: Opc = Alpha::CMPTEQ; inv = true; break;
}
Tmp1 = SelectExpr(N.getOperand(0));
Tmp2 = SelectExpr(N.getOperand(1));
if (rev) std::swap(Tmp1, Tmp2);
Tmp3 = MakeReg(MVT::f64);
//do the comparison
BuildMI(BB, Opc, 2, Tmp3).addReg(Tmp1).addReg(Tmp2);
//now arrange for Result (int) to have a 1 or 0
// Spill the FP to memory and reload it from there.
unsigned Size = MVT::getSizeInBits(MVT::f64)/8;
MachineFunction *F = BB->getParent();
int FrameIdx = F->getFrameInfo()->CreateStackObject(Size, 8);
unsigned Tmp4 = MakeReg(MVT::f64);
BuildMI(BB, Alpha::CVTTQ, 1, Tmp4).addReg(Tmp3);
BuildMI(BB, Alpha::STT, 3).addReg(Tmp4).addFrameIndex(FrameIdx).addReg(Alpha::F31);
unsigned Tmp5 = MakeReg(MVT::i64);
BuildMI(BB, Alpha::LDQ, 2, Tmp5).addFrameIndex(FrameIdx).addReg(Alpha::F31);
//now, set result based on Tmp5
//Set Tmp6 if fp cmp was false
unsigned Tmp6 = MakeReg(MVT::i64);
BuildMI(BB, Alpha::CMPEQ, 2, Tmp6).addReg(Tmp5).addReg(Alpha::R31);
//and invert
BuildMI(BB, Alpha::CMPEQ, 2, Result).addReg(Tmp6).addReg(Alpha::R31);
}
// else
// {
// Node->dump();
// assert(0 && "Not a setcc in setcc");
// }
}
else
{
Node->dump();
assert(0 && "Not a setcc in setcc");
}
return Result;
}
@ -1101,7 +1148,8 @@ void ISel::Select(SDOperand N) {
MachineBasicBlock *Dest =
cast<BasicBlockSDNode>(N.getOperand(2))->getBasicBlock();
Select(N.getOperand(0));
Select(N.getOperand(0)); //chain
Tmp1 = SelectExpr(N.getOperand(1));
BuildMI(BB, Alpha::BNE, 2).addReg(Tmp1).addMBB(Dest);
return;

10
lib/Target/Alpha/AlphaInstrInfo.td
View File

@ -224,6 +224,11 @@ def CMPULEi : OFormL<0x10, 0x3D, (ops GPRC:$RC, GPRC:$RA, u8imm:$L), "CMPULE $R
def CMPULT : OForm< 0x10, 0x1D, (ops GPRC:$RC, GPRC:$RA, GPRC:$RB), "CMPULT $RA,$RB,$RC">; //Compare unsigned quadword less than
def CMPULTi : OFormL<0x10, 0x1D, (ops GPRC:$RC, GPRC:$RA, u8imm:$L), "CMPULT $RA,$L,$RC">; //Compare unsigned quadword less than
//Comparison, FP
def CMPTEQ : FPForm<0x16, 0x0A5, (ops FPRC:$RC, FPRC:$RA, FPRC:$RB), "cmpteq $RA,$RB,$RC">; //Compare T_floating equal
def CMPTLE : FPForm<0x16, 0x0A7, (ops FPRC:$RC, FPRC:$RA, FPRC:$RB), "cmptle $RA,$RB,$RC">; //Compare T_floating less than or equal
def CMPTLT : FPForm<0x16, 0x0A6, (ops FPRC:$RC, FPRC:$RA, FPRC:$RB), "cmptlt $RA,$RB,$RC">; //Compare T_floating less than
def CMPTUN : FPForm<0x16, 0x0A4, (ops FPRC:$RC, FPRC:$RA, FPRC:$RB), "cmptun $RA,$RB,$RC">; //Compare T_floating unordered
//There are in the Multimedia extentions, so let's not use them yet
def MAXSB8 : OForm<0x1C, 0x3E, (ops GPRC:$RC, GPRC:$RA, GPRC:$RB), "MAXSB8 $RA,$RB,$RC">; //Vector signed byte maximum
@ -363,11 +368,6 @@ def CVTTS : FPForm<0x16, 0x2AC, (ops FPRC:$RC, FPRC:$RA), "cvtts $RA,$RC">; //Co
//WH64 Mfc 18.F800 Write hint  64 bytes
//WMB Mfc 18.4400 Write memory barrier
//CMPTEQ F-P 16.0A5 Compare T_floating equal
//CMPTLE F-P 16.0A7 Compare T_floating less than or equal
//CMPTLT F-P 16.0A6 Compare T_floating less than
//CMPTUN F-P 16.0A4 Compare T_floating unordered
//FCMOVEQ F-P 17.02A FCMOVE if = zero
//FCMOVGE F-P 17.02D FCMOVE if >= zero
//FCMOVGT F-P 17.02F FCMOVE if > zero