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implement pretty printing support for the various pseudo 

ops the asmprinter supported, fixing PowerPC/rlwimi2.ll
among others.  Down to 20 failures.

llvm-svn: 119080
This commit is contained in:
Chris Lattner 2010-11-14 21:39:51 +00:00
parent c2ac86e261
commit 219cc3d586
1 changed files with 45 additions and 0 deletions
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45
llvm/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
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@ -36,6 +36,51 @@ StringRef PPCInstPrinter::getOpcodeName(unsigned Opcode) const {
void PPCInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
// TODO: pseudo ops.
// Check for slwi/srwi mnemonics.
if (MI->getOpcode() == PPC::RLWINM) {
unsigned char SH = MI->getOperand(2).getImm();
unsigned char MB = MI->getOperand(3).getImm();
unsigned char ME = MI->getOperand(4).getImm();
bool useSubstituteMnemonic = false;
if (SH <= 31 && MB == 0 && ME == (31-SH)) {
O << "\tslwi "; useSubstituteMnemonic = true;
}
if (SH <= 31 && MB == (32-SH) && ME == 31) {
O << "\tsrwi "; useSubstituteMnemonic = true;
SH = 32-SH;
}
if (useSubstituteMnemonic) {
printOperand(MI, 0, O);
O << ", ";
printOperand(MI, 1, O);
O << ", " << (unsigned int)SH;
return;
}
}
if ((MI->getOpcode() == PPC::OR || MI->getOpcode() == PPC::OR8) &&
MI->getOperand(1).getReg() == MI->getOperand(2).getReg()) {
O << "\tmr ";
printOperand(MI, 0, O);
O << ", ";
printOperand(MI, 1, O);
return;
}
if (MI->getOpcode() == PPC::RLDICR) {
unsigned char SH = MI->getOperand(2).getImm();
unsigned char ME = MI->getOperand(3).getImm();
// rldicr RA, RS, SH, 63-SH == sldi RA, RS, SH
if (63-SH == ME) {
O << "\tsldi ";
printOperand(MI, 0, O);
O << ", ";
printOperand(MI, 1, O);
O << ", " << (unsigned int)SH;
return;
}
}
printInstruction(MI, O);
}