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* Added support for the %ccr register

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* FP double registers are now coded correctly
* Removed function which converted registers based on register types, it was
  broken (because regTypes are broken)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7175 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2003-07-14 23:26:03 +00:00
parent 1ba3138cdc
commit 173e250548
2 changed files with 24 additions and 77 deletions
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95
lib/Target/SparcV9/SparcV9CodeEmitter.cpp
View File

@ -344,65 +344,13 @@ bool SparcV9CodeEmitter::isFPInstr(MachineInstr &MI) {
}
unsigned
SparcV9CodeEmitter::getRealRegNumByType(unsigned fakeReg, unsigned regType,
MachineInstr &MI) {
switch (regType) {
case UltraSparcRegInfo::IntRegType: {
// Sparc manual, p31
static const unsigned IntRegMap[] = {
// "o0", "o1", "o2", "o3", "o4", "o5", "o7",
8, 9, 10, 11, 12, 13, 15,
// "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
16, 17, 18, 19, 20, 21, 22, 23,
// "i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7",
24, 25, 26, 27, 28, 29, 30, 31,
// "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
0, 1, 2, 3, 4, 5, 6, 7,
// "o6"
14
};
return IntRegMap[fakeReg];
break;
}
case UltraSparcRegInfo::FPSingleRegType: {
DEBUG(std::cerr << "FP single reg: " << fakeReg << "\n");
return fakeReg;
}
case UltraSparcRegInfo::FPDoubleRegType: {
DEBUG(std::cerr << "FP double reg: " << fakeReg << "\n");
return fakeReg;
}
case UltraSparcRegInfo::FloatCCRegType: {
/* These are laid out %fcc0 - %fcc3 => 0 - 3, so are correct */
DEBUG(std::cerr << "FP CC reg: " << fakeReg << "\n");
return fakeReg;
}
case UltraSparcRegInfo::IntCCRegType: {
static const unsigned FPInstrIntCCReg[] = { 6 /* xcc */, 4 /* icc */ };
static const unsigned IntInstrIntCCReg[] = { 2 /* xcc */, 0 /* icc */ };
if (isFPInstr(MI)) {
assert(fakeReg < sizeof(FPInstrIntCCReg)/sizeof(FPInstrIntCCReg[0])
&& "FP CC register out of bounds for FPInstr IntCCReg map");
DEBUG(std::cerr << "FP instr, IntCC reg: " << FPInstrIntCCReg[fakeReg] << "\n");
return FPInstrIntCCReg[fakeReg];
} else {
assert(fakeReg < sizeof(IntInstrIntCCReg)/sizeof(IntInstrIntCCReg[0])
&& "Int CC register out of bounds for IntInstr IntCCReg map");
DEBUG(std::cerr << "FP instr, IntCC reg: " << IntInstrIntCCReg[fakeReg] << "\n");
return IntInstrIntCCReg[fakeReg];
}
}
default:
assert(0 && "Invalid unified register number in getRegType");
return fakeReg;
}
}
unsigned
SparcV9CodeEmitter::getRealRegNumByClass(unsigned fakeReg, unsigned regClass,
SparcV9CodeEmitter::getRealRegNum(unsigned fakeReg,
MachineInstr &MI) {
const TargetRegInfo &RI = TM.getRegInfo();
unsigned regClass, regType = RI.getRegType(fakeReg);
// At least map fakeReg into its class
fakeReg = RI.getClassRegNum(fakeReg, regClass);
switch (regClass) {
case UltraSparcRegInfo::IntRegClassID: {
// Sparc manual, p31
@ -424,11 +372,23 @@ SparcV9CodeEmitter::getRealRegNumByClass(unsigned fakeReg, unsigned regClass,
}
case UltraSparcRegInfo::FloatRegClassID: {
DEBUG(std::cerr << "FP reg: " << fakeReg << "\n");
if (regType == UltraSparcRegInfo::FPSingleRegType) {
// only numbered 0-31, hence can already fit into 5 bits (and 6)
DEBUG(std::cerr << "FP single reg, returning: " << fakeReg << "\n");
} else if (regType == UltraSparcRegInfo::FPDoubleRegType) {
// FIXME: This assumes that we only have 5-bit register fiels!
// From Sparc Manual, page 40.
// The bit layout becomes: b[4], b[3], b[2], b[1], b[5]
fakeReg |= (fakeReg >> 5) & 1;
fakeReg &= 0x1f;
DEBUG(std::cerr << "FP double reg, returning: " << fakeReg << "\n");
}
return fakeReg;
}
case UltraSparcRegInfo::IntCCRegClassID: {
static const unsigned FPInstrIntCCReg[] = { 6 /* xcc */, 4 /* icc */ };
static const unsigned IntInstrIntCCReg[] = { 2 /* xcc */, 0 /* icc */ };
/* xcc, icc, ccr */
static const unsigned FPInstrIntCCReg[] = { 6, 4, 2 };
static const unsigned IntInstrIntCCReg[] = { 2, 0, 2 };
if (isFPInstr(MI)) {
assert(fakeReg < sizeof(FPInstrIntCCReg)/sizeof(FPInstrIntCCReg[0])
@ -536,17 +496,9 @@ int64_t SparcV9CodeEmitter::getMachineOpValue(MachineInstr &MI,
// This is necessary because the Sparc backend doesn't actually lay out
// registers in the real fashion -- it skips those that it chooses not to
// allocate, i.e. those that are the FP, SP, etc.
unsigned fakeReg = MO.getAllocatedRegNum(), regClass, regType;
unsigned realRegByClass; //realRegByType,
const TargetRegInfo &RI = TM.getRegInfo();
DEBUG(std::cerr << std::dec << "LLC: " << fakeReg << " => "
<< RI.getUnifiedRegName(fakeReg) << "\n");
regType = RI.getRegType(fakeReg);
// At least map fakeReg into its class
fakeReg = RI.getClassRegNum(fakeReg, regClass);
//realRegByType = getRealRegNumByType(fakeReg, regType, MI);
realRegByClass = getRealRegNumByClass(fakeReg, regClass, MI);
DEBUG(std::cerr << MO << ": Reg[" << std::dec << fakeReg << "] = by class: "
unsigned fakeReg = MO.getAllocatedRegNum();
unsigned realRegByClass = getRealRegNum(fakeReg, MI);
DEBUG(std::cerr << MO << ": Reg[" << std::dec << fakeReg << "] => "
<< realRegByClass << "\n");
rv = realRegByClass;
} else if (MO.isImmediate()) {
@ -719,4 +671,3 @@ void* SparcV9CodeEmitter::getGlobalAddress(GlobalValue *V, MachineInstr &MI,
#include "SparcV9CodeEmitter.inc"

6
lib/Target/SparcV9/SparcV9CodeEmitter.h
View File

@ -48,11 +48,7 @@ private:
void* getGlobalAddress(GlobalValue *V, MachineInstr &MI,
bool isPCRelative);
bool isFPInstr(MachineInstr &MI);
unsigned getRealRegNumByType(unsigned fakeReg, unsigned regType,
MachineInstr &MI);
unsigned getRealRegNumByClass(unsigned fakeReg, unsigned regClass,
MachineInstr &MI);
unsigned getRealRegNum(unsigned fakeReg, MachineInstr &MI);
};
#endif