[llvm-commits] CVS: llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp

[Nate Begeman]

Changes in directory llvm/lib/Target/PowerPC:

PowerPCAsmPrinter.cpp updated: 1.73 -> 1.74
---
Log message:

Behold, rlwinm with certain immediate arguments is printed as the much more
readable slwi or srwi (shift left/right word immediate).


---
Diffs of the changes:  (+22 -0)

 PowerPCAsmPrinter.cpp |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+)


Index: llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
diff -u llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp:1.73 llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp:1.74
--- llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp:1.73	Tue Mar 29 19:45:43 2005
+++ llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp	Tue Apr  5 13:19:50 2005
@@ -397,6 +397,28 @@
 ///
 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