src/gallium/drivers/radeon/AMDGPUMCInstLower.cpp


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#include "AMDGPUMCInstLower.h"
#include "AMDGPUAsmPrinter.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Constants.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/ErrorHandling.h"

using namespace llvm;

AMDGPUMCInstLower::AMDGPUMCInstLower() { }

void AMDGPUMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
  OutMI.setOpcode(MI->getOpcode());

  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
    const MachineOperand &MO = MI->getOperand(i);

    MCOperand MCOp;
    switch (MO.getType()) {
    default:
      MI->dump();
      llvm_unreachable("unknown operand type");
    case MachineOperand::MO_FPImmediate: {
      const APFloat &FloatValue = MO.getFPImm()->getValueAPF();
      assert(&FloatValue.getSemantics() == &APFloat::IEEEsingle &&
             "Only floating point immediates are supported at the moment.");
      MCOp = MCOperand::CreateFPImm(FloatValue.convertToFloat());
      break;
    }
    case MachineOperand::MO_Immediate:
      MCOp = MCOperand::CreateImm(MO.getImm());
      break;
    case MachineOperand::MO_Register:
      MCOp = MCOperand::CreateReg(MO.getReg());
      break;
    }
    OutMI.addOperand(MCOp);
  }
}

void AMDGPUAsmPrinter::EmitInstruction(const MachineInstr *MI) {
  AMDGPUMCInstLower MCInstLowering;
  MCInst TmpInst;
  MCInstLowering.Lower(MI, TmpInst);
  OutStreamer.EmitInstruction(TmpInst);
}