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ARM fix encoding of VMOV.f32 and VMOV.f64 immediates.

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Encode the immediate into its 8-bit form as part of isel rather than later,
which simplifies things for mapping the encoding bits, allows the removal
of the custom disassembler decoding hook, makes the operand printer trivial,
and prepares things more cleanly for handling these in the asm parser.

rdar://10211428



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140834 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2011-09-30 00:50:06 +00:00
parent 203e0b17dd
commit 4ebbf7b8a8
8 changed files with 128 additions and 145 deletions
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35
lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
View File

@@ -934,39 +934,10 @@ void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
O << "]";
}
void ARMInstPrinter::printVFPf32ImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
void ARMInstPrinter::printFPImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
O << '#';
if (MO.isFPImm()) {
O << (float)MO.getFPImm();
} else {
union {
uint32_t I;
float F;
} FPUnion;
FPUnion.I = MO.getImm();
O << FPUnion.F;
}
}
void ARMInstPrinter::printVFPf64ImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
O << '#';
if (MO.isFPImm()) {
O << MO.getFPImm();
} else {
// We expect the binary encoding of a floating point number here.
union {
uint64_t I;
double D;
} FPUnion;
FPUnion.I = MO.getImm();
O << FPUnion.D;
}
O << '#' << ARM_AM::getFPImmFloat(MO.getImm());
}
void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,

3
lib/Target/ARM/InstPrinter/ARMInstPrinter.h
View File

@@ -120,8 +120,7 @@ public:
void printNoHashImmediate(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printPImmediate(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printCImmediate(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printVFPf32ImmOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printVFPf64ImmOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printFPImmOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printNEONModImmOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printImmPlusOneOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);
void printRotImmOperand(const MCInst *MI, unsigned OpNum, raw_ostream &O);