OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 6
Code Issues Packages Projects Releases Wiki Activity

Behold, rlwinm with certain immediate arguments is printed as the much more 

readable slwi or srwi (shift left/right word immediate).

llvm-svn: 21099
This commit is contained in:
Nate Begeman 2005-04-05 18:19:50 +00:00
parent a188b698a2
commit 524417357c
1 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
View File

@ -397,6 +397,28 @@ void PowerPCAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
///
void PowerPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
// Check for slwi/srwi mnemonics.
if (MI->getOpcode() == PPC::RLWINM) {
bool FoundMnemonic = false;
unsigned char SH = MI->getOperand(2).getImmedValue();
unsigned char MB = MI->getOperand(3).getImmedValue();
unsigned char ME = MI->getOperand(4).getImmedValue();
if (SH <= 31 && MB == 0 && ME == (31-SH)) {
O << "slwi "; FoundMnemonic = true;
}
if (SH <= 31 && MB == (32-SH) && ME == 31) {
O << "srwi "; FoundMnemonic = true;
SH = 32-SH;
}
if (FoundMnemonic) {
printOperand(MI, 0, MVT::i64);
O << ", ";
printOperand(MI, 1, MVT::i64);
O << ", " << (unsigned int)SH << "\n";
return;
}
}
if (printInstruction(MI))
return; // Printer was automatically generated