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Add support for OneArgFPRW instructions, fix a couple of typeos

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11077 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-02 19:23:15 +00:00
parent 03f84a969c
commit 4a06f35484
2 changed files with 86 additions and 24 deletions
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55
lib/Target/X86/FloatingPoint.cpp
View File

@ -94,7 +94,7 @@ namespace {
return StackTop - 1 - getSlot(RegNo) + llvm::X86::ST0;
}
// pushReg - Push the specifiex FP<n> register onto the stack
// pushReg - Push the specified FP<n> register onto the stack
void pushReg(unsigned Reg) {
assert(Reg < 8 && "Register number out of range!");
assert(StackTop < 8 && "Stack overflow!");
@ -140,6 +140,7 @@ namespace {
void handleZeroArgFP(MachineBasicBlock::iterator &I);
void handleOneArgFP(MachineBasicBlock::iterator &I);
void handleOneArgFPRW(MachineBasicBlock::iterator &I);
void handleTwoArgFP(MachineBasicBlock::iterator &I);
void handleSpecialFP(MachineBasicBlock::iterator &I);
};
@ -219,14 +220,11 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
});
switch (Flags & X86II::FPTypeMask) {
case X86II::ZeroArgFP: handleZeroArgFP(I); break;
case X86II::OneArgFP: handleOneArgFP(I); break;
case X86II::OneArgFPRW: // ST(0) = fsqrt(ST(0))
assert(0 && "FP instr type not handled yet!");
case X86II::TwoArgFP: handleTwoArgFP(I); break;
case X86II::SpecialFP: handleSpecialFP(I); break;
case X86II::ZeroArgFP: handleZeroArgFP(I); break;
case X86II::OneArgFP: handleOneArgFP(I); break; // fstp ST(0)
case X86II::OneArgFPRW: handleOneArgFPRW(I); break; // ST(0) = fsqrt(ST(0))
case X86II::TwoArgFP: handleTwoArgFP(I); break;
case X86II::SpecialFP: handleSpecialFP(I); break;
default: assert(0 && "Unknown FP Type!");
}
@ -371,7 +369,7 @@ static unsigned getFPReg(const MachineOperand &MO) {
//===----------------------------------------------------------------------===//
/// handleZeroArgFP - ST(0) = fld0 ST(0) = flds <mem>
//
///
void FPS::handleZeroArgFP(MachineBasicBlock::iterator &I) {
MachineInstr *MI = *I;
unsigned DestReg = getFPReg(MI->getOperand(0));
@ -381,12 +379,13 @@ void FPS::handleZeroArgFP(MachineBasicBlock::iterator &I) {
pushReg(DestReg);
}
/// handleOneArgFP - fst ST(0), <mem>
//
/// handleOneArgFP - fst <mem>, ST(0)
///
void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
MachineInstr *MI = *I;
assert(MI->getNumOperands() == 5 && "Can only handle fst* instructions!");
// Is this the last use of the source register?
unsigned Reg = getFPReg(MI->getOperand(4));
bool KillsSrc = false;
for (LiveVariables::killed_iterator KI = LV->killed_begin(MI),
@ -414,6 +413,38 @@ void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
}
}
/// handleOneArgFPRW - fchs - ST(0) = -ST(0)
///
void FPS::handleOneArgFPRW(MachineBasicBlock::iterator &I) {
MachineInstr *MI = *I;
assert(MI->getNumOperands() == 2 && "Can only handle fst* instructions!");
// Is this the last use of the source register?
unsigned Reg = getFPReg(MI->getOperand(1));
bool KillsSrc = false;
for (LiveVariables::killed_iterator KI = LV->killed_begin(MI),
E = LV->killed_end(MI); KI != E; ++KI)
KillsSrc |= KI->second == X86::FP0+Reg;
if (KillsSrc) {
// If this is the last use of the source register, just make sure it's on
// the top of the stack.
moveToTop(Reg, I);
assert(StackTop > 0 && "Stack cannot be empty!");
--StackTop;
pushReg(getFPReg(MI->getOperand(0)));
} else {
// If this is not the last use of the source register, _copy_ it to the top
// of the stack.
duplicateToTop(Reg, getFPReg(MI->getOperand(0)), I);
}
MI->RemoveOperand(1); // Drop the source operand.
MI->RemoveOperand(0); // Drop the destination operand.
}
//===----------------------------------------------------------------------===//
// Define tables of various ways to map pseudo instructions
//

55
lib/Target/X86/X86FloatingPoint.cpp
View File

@ -94,7 +94,7 @@ namespace {
return StackTop - 1 - getSlot(RegNo) + llvm::X86::ST0;
}
// pushReg - Push the specifiex FP<n> register onto the stack
// pushReg - Push the specified FP<n> register onto the stack
void pushReg(unsigned Reg) {
assert(Reg < 8 && "Register number out of range!");
assert(StackTop < 8 && "Stack overflow!");
@ -140,6 +140,7 @@ namespace {
void handleZeroArgFP(MachineBasicBlock::iterator &I);
void handleOneArgFP(MachineBasicBlock::iterator &I);
void handleOneArgFPRW(MachineBasicBlock::iterator &I);
void handleTwoArgFP(MachineBasicBlock::iterator &I);
void handleSpecialFP(MachineBasicBlock::iterator &I);
};
@ -219,14 +220,11 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
});
switch (Flags & X86II::FPTypeMask) {
case X86II::ZeroArgFP: handleZeroArgFP(I); break;
case X86II::OneArgFP: handleOneArgFP(I); break;
case X86II::OneArgFPRW: // ST(0) = fsqrt(ST(0))
assert(0 && "FP instr type not handled yet!");
case X86II::TwoArgFP: handleTwoArgFP(I); break;
case X86II::SpecialFP: handleSpecialFP(I); break;
case X86II::ZeroArgFP: handleZeroArgFP(I); break;
case X86II::OneArgFP: handleOneArgFP(I); break; // fstp ST(0)
case X86II::OneArgFPRW: handleOneArgFPRW(I); break; // ST(0) = fsqrt(ST(0))
case X86II::TwoArgFP: handleTwoArgFP(I); break;
case X86II::SpecialFP: handleSpecialFP(I); break;
default: assert(0 && "Unknown FP Type!");
}
@ -371,7 +369,7 @@ static unsigned getFPReg(const MachineOperand &MO) {
//===----------------------------------------------------------------------===//
/// handleZeroArgFP - ST(0) = fld0 ST(0) = flds <mem>
//
///
void FPS::handleZeroArgFP(MachineBasicBlock::iterator &I) {
MachineInstr *MI = *I;
unsigned DestReg = getFPReg(MI->getOperand(0));
@ -381,12 +379,13 @@ void FPS::handleZeroArgFP(MachineBasicBlock::iterator &I) {
pushReg(DestReg);
}
/// handleOneArgFP - fst ST(0), <mem>
//
/// handleOneArgFP - fst <mem>, ST(0)
///
void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
MachineInstr *MI = *I;
assert(MI->getNumOperands() == 5 && "Can only handle fst* instructions!");
// Is this the last use of the source register?
unsigned Reg = getFPReg(MI->getOperand(4));
bool KillsSrc = false;
for (LiveVariables::killed_iterator KI = LV->killed_begin(MI),
@ -414,6 +413,38 @@ void FPS::handleOneArgFP(MachineBasicBlock::iterator &I) {
}
}
/// handleOneArgFPRW - fchs - ST(0) = -ST(0)
///
void FPS::handleOneArgFPRW(MachineBasicBlock::iterator &I) {
MachineInstr *MI = *I;
assert(MI->getNumOperands() == 2 && "Can only handle fst* instructions!");
// Is this the last use of the source register?
unsigned Reg = getFPReg(MI->getOperand(1));
bool KillsSrc = false;
for (LiveVariables::killed_iterator KI = LV->killed_begin(MI),
E = LV->killed_end(MI); KI != E; ++KI)
KillsSrc |= KI->second == X86::FP0+Reg;
if (KillsSrc) {
// If this is the last use of the source register, just make sure it's on
// the top of the stack.
moveToTop(Reg, I);
assert(StackTop > 0 && "Stack cannot be empty!");
--StackTop;
pushReg(getFPReg(MI->getOperand(0)));
} else {
// If this is not the last use of the source register, _copy_ it to the top
// of the stack.
duplicateToTop(Reg, getFPReg(MI->getOperand(0)), I);
}
MI->RemoveOperand(1); // Drop the source operand.
MI->RemoveOperand(0); // Drop the destination operand.
}
//===----------------------------------------------------------------------===//
// Define tables of various ways to map pseudo instructions
//