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100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
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//===-- PPCMCCodeEmitter.cpp - Convert PPC code to machine code -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PPCMCCodeEmitter class.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "mccodeemitter"
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#include "PPC.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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STATISTIC(MCNumEmitted, "Number of MC instructions emitted");
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namespace {
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class PPCMCCodeEmitter : public MCCodeEmitter {
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PPCMCCodeEmitter(const PPCMCCodeEmitter &); // DO NOT IMPLEMENT
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void operator=(const PPCMCCodeEmitter &); // DO NOT IMPLEMENT
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const TargetMachine &TM;
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MCContext &Ctx;
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public:
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PPCMCCodeEmitter(TargetMachine &tm, MCContext &ctx)
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: TM(tm), Ctx(ctx) {
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}
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~PPCMCCodeEmitter() {}
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unsigned getNumFixupKinds() const { return 0 /*PPC::NumTargetFixupKinds*/; }
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const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const {
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const static MCFixupKindInfo Infos[] = {
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#if 0
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// name offset bits flags
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{ "fixup_arm_pcrel_12", 2, 12, MCFixupKindInfo::FKF_IsPCRel },
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{ "fixup_arm_vfp_pcrel_12", 3, 8, MCFixupKindInfo::FKF_IsPCRel },
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{ "fixup_arm_branch", 1, 24, MCFixupKindInfo::FKF_IsPCRel },
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#endif
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};
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if (Kind < FirstTargetFixupKind)
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return MCCodeEmitter::getFixupKindInfo(Kind);
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assert(unsigned(Kind - FirstTargetFixupKind) < getNumFixupKinds() &&
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"Invalid kind!");
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return Infos[Kind - FirstTargetFixupKind];
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}
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/// getMachineOpValue - Return binary encoding of operand. If the machine
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/// operand requires relocation, record the relocation and return zero.
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unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO,
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SmallVectorImpl<MCFixup> &Fixups) const;
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// getBinaryCodeForInstr - TableGen'erated function for getting the
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// binary encoding for an instruction.
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unsigned getBinaryCodeForInstr(const MCInst &MI,
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SmallVectorImpl<MCFixup> &Fixups) const;
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void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
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SmallVectorImpl<MCFixup> &Fixups) const {
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unsigned Bits = getBinaryCodeForInstr(MI, Fixups);
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// Output the constant in big endian byte order.
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for (unsigned i = 0; i != 4; ++i) {
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OS << (char)(Bits >> 24);
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Bits <<= 8;
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}
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++MCNumEmitted; // Keep track of the # of mi's emitted.
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}
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};
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} // end anonymous namespace
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MCCodeEmitter *llvm::createPPCMCCodeEmitter(const Target &, TargetMachine &TM,
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MCContext &Ctx) {
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return new PPCMCCodeEmitter(TM, Ctx);
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}
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unsigned PPCMCCodeEmitter::
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getMachineOpValue(const MCInst &MI, const MCOperand &MO,
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SmallVectorImpl<MCFixup> &Fixups) const {
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// FIXME.
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return 0;
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}
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#include "PPCGenMCCodeEmitter.inc"
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