mirror of
https://github.com/c64scene-ar/llvm-6502.git
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91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
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#include "llvm/PassManager.h"
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#include "llvm/CodeGen/MachineCodeEmitter.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "SparcInternals.h"
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namespace {
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class SparcV9CodeEmitter : public MachineFunctionPass {
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MachineCodeEmitter &MCE;
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public:
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SparcV9CodeEmitter(MachineCodeEmitter &M) : MCE(M) {}
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bool runOnMachineFunction(MachineFunction &F);
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private:
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int64_t getMachineOpValue(MachineOperand &MO);
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unsigned getValueBit(int64_t Val, unsigned bit);
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void emitConstant(unsigned Val, unsigned Size);
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void emitBasicBlock(MachineBasicBlock &MBB);
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void emitInstruction(MachineInstr &MI);
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/// Function generated by the CodeEmitterGenerator using TableGen
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///
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unsigned getBinaryCodeForInstr(MachineInstr &MI);
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};
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}
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bool UltraSparc::addPassesToEmitMachineCode(PassManager &PM,
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MachineCodeEmitter &MCE) {
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//PM.add(new SparcV9CodeEmitter(MCE));
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//MachineCodeEmitter *M = MachineCodeEmitter::createDebugMachineCodeEmitter();
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MachineCodeEmitter *M =
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MachineCodeEmitter::createFilePrinterMachineCodeEmitter();
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PM.add(new SparcV9CodeEmitter(*M));
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return false;
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}
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void SparcV9CodeEmitter::emitConstant(unsigned Val, unsigned Size) {
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// Output the constant in big endian byte order...
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unsigned byteVal;
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for (int i = Size-1; i >= 0; --i) {
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byteVal = Val >> 8*i;
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MCE.emitByte(byteVal & 255);
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}
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}
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int64_t SparcV9CodeEmitter::getMachineOpValue(MachineOperand &MO) {
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if (MO.isPhysicalRegister()) {
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return MO.getReg();
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} else if (MO.isImmediate()) {
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return MO.getImmedValue();
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} else if (MO.isPCRelativeDisp()) {
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// FIXME!!!
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//return MO.getPCRelativeDisp();
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return 0;
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} else {
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assert(0 && "Unknown type of MachineOperand");
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return 0;
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}
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}
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unsigned SparcV9CodeEmitter::getValueBit(int64_t Val, unsigned bit) {
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Val >>= bit;
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return (Val & 1);
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}
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bool SparcV9CodeEmitter::runOnMachineFunction(MachineFunction &MF) {
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MCE.startFunction(MF);
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MCE.emitConstantPool(MF.getConstantPool());
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for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
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emitBasicBlock(*I);
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MCE.finishFunction(MF);
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return false;
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}
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void SparcV9CodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
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MCE.startBasicBlock(MBB);
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for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I)
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emitInstruction(**I);
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}
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void SparcV9CodeEmitter::emitInstruction(MachineInstr &MI) {
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emitConstant(getBinaryCodeForInstr(MI), 4);
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}
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#include "SparcV9CodeEmitter.inc"
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