From ad5f65c74bb2b06fdb5544d2dcdf586b26c44ca0 Mon Sep 17 00:00:00 2001 From: Nate Begeman Date: Tue, 5 Apr 2005 18:19:50 +0000 Subject: [PATCH] Behold, rlwinm with certain immediate arguments is printed as the much more readable slwi or srwi (shift left/right word immediate). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21099 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/PPCAsmPrinter.cpp | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp index 025ce9824b3..3006f624103 100644 --- a/lib/Target/PowerPC/PPCAsmPrinter.cpp +++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp @@ -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