76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
#include "MCTargetDesc/FootMCTargetDesc.h"
|
|
#include "llvm/MC/MCCodeEmitter.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCInstrInfo.h"
|
|
#include "llvm/MC/MCRegisterInfo.h"
|
|
#include "llvm/MC/MCFixup.h"
|
|
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/Support/Casting.h"
|
|
#include "llvm/Support/EndianStream.h"
|
|
|
|
#include <cstdint>
|
|
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "mccodeemitter"
|
|
|
|
namespace {
|
|
|
|
class FootMCCodeEmitter : public MCCodeEmitter {
|
|
MCContext &MCCtxt;
|
|
|
|
public:
|
|
FootMCCodeEmitter(MCContext &MCCtxt) : MCCodeEmitter(), MCCtxt(MCCtxt) {}
|
|
~FootMCCodeEmitter() override = default;
|
|
|
|
uint64_t getBinaryCodeForInstr(const MCInst &MI,
|
|
SmallVectorImpl<MCFixup> &Fixups,
|
|
const MCSubtargetInfo &STI) const;
|
|
|
|
unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO,
|
|
SmallVectorImpl<MCFixup> &Fixups,
|
|
const MCSubtargetInfo &STI) const;
|
|
|
|
void encodeInstruction(const MCInst &MI, SmallVectorImpl<char> &CB,
|
|
SmallVectorImpl<MCFixup> &Fixups,
|
|
const MCSubtargetInfo &STI) const override;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
MCCodeEmitter *llvm::createFootMCCodeEmitter(const MCInstrInfo &MCII,
|
|
MCContext &MCCtxt) {
|
|
return new FootMCCodeEmitter(MCCtxt);
|
|
}
|
|
|
|
unsigned FootMCCodeEmitter::getMachineOpValue(const MCInst &MI, const MCOperand &MO,
|
|
SmallVectorImpl<MCFixup> &Fixups,
|
|
const MCSubtargetInfo &STI) const {
|
|
if (MO.isReg()) {
|
|
return MCCtxt.getRegisterInfo()->getEncodingValue(MO.getReg());
|
|
}
|
|
if (MO.isImm()) {
|
|
return static_cast<unsigned>(MO.getImm());
|
|
}
|
|
if (MO.isExpr()) {
|
|
MCFixupKind FK = FK_Data_2;
|
|
Fixups.push_back(MCFixup::create(0, MO.getExpr(), FK));
|
|
return 0;
|
|
}
|
|
llvm_unreachable("Unsupported operation type");
|
|
return 0;
|
|
}
|
|
|
|
void FootMCCodeEmitter::encodeInstruction(const MCInst &MI,
|
|
SmallVectorImpl<char> &CB,
|
|
SmallVectorImpl<MCFixup> &Fixups,
|
|
const MCSubtargetInfo &STI) const {
|
|
uint64_t Encoding = getBinaryCodeForInstr(MI, Fixups, STI);
|
|
assert(((Encoding & 0xffffffff00000000) == 0) && "Only the first 32 bits should be set");
|
|
support::endian::write<uint32_t>(CB, Encoding, llvm::endianness::little);
|
|
}
|
|
|
|
#include "FootGenAsmEmitter.inc"
|