//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "mccodeemitter"
#include "MCTargetDesc/PPCMCTargetDesc.h"
#include "MCTargetDesc/PPCFixupKinds.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/EndianStream.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetOpcodes.h"
using namespace llvm;
+#define DEBUG_TYPE "mccodeemitter"
+
STATISTIC(MCNumEmitted, "Number of MC instructions emitted");
namespace {
class PPCMCCodeEmitter : public MCCodeEmitter {
- PPCMCCodeEmitter(const PPCMCCodeEmitter &) LLVM_DELETED_FUNCTION;
- void operator=(const PPCMCCodeEmitter &) LLVM_DELETED_FUNCTION;
+ PPCMCCodeEmitter(const PPCMCCodeEmitter &) = delete;
+ void operator=(const PPCMCCodeEmitter &) = delete;
const MCInstrInfo &MCII;
const MCContext &CTX;
+ bool IsLittleEndian;
public:
PPCMCCodeEmitter(const MCInstrInfo &mcii, MCContext &ctx)
- : MCII(mcii), CTX(ctx) {
- }
-
- ~PPCMCCodeEmitter() {}
+ : MCII(mcii), CTX(ctx),
+ IsLittleEndian(ctx.getAsmInfo()->isLittleEndian()) {}
+
+ ~PPCMCCodeEmitter() override {}
unsigned getDirectBrEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
unsigned getMemRIXEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
+ unsigned getSPE8DisEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const;
+ unsigned getSPE4DisEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const;
+ unsigned getSPE2DisEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI) const;
unsigned getTLSRegEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
uint64_t getBinaryCodeForInstr(const MCInst &MI,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const;
- void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
+ void encodeInstruction(const MCInst &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
- const MCSubtargetInfo &STI) const {
+ const MCSubtargetInfo &STI) const override {
// For fast-isel, a float COPY_TO_REGCLASS can survive this long.
// It's just a nop to keep the register classes happy, so don't
// generate anything.
uint64_t Bits = getBinaryCodeForInstr(MI, Fixups, STI);
- // Output the constant in big endian byte order.
+ // Output the constant in big/little endian byte order.
unsigned Size = Desc.getSize();
- int ShiftValue = (Size * 8) - 8;
- for (unsigned i = 0; i != Size; ++i) {
- OS << (char)(Bits >> ShiftValue);
- Bits <<= 8;
+ switch (Size) {
+ case 4:
+ if (IsLittleEndian) {
+ support::endian::Writer<support::little>(OS).write<uint32_t>(Bits);
+ } else {
+ support::endian::Writer<support::big>(OS).write<uint32_t>(Bits);
+ }
+ break;
+ case 8:
+ // If we emit a pair of instructions, the first one is
+ // always in the top 32 bits, even on little-endian.
+ if (IsLittleEndian) {
+ uint64_t Swapped = (Bits << 32) | (Bits >> 32);
+ support::endian::Writer<support::little>(OS).write<uint64_t>(Swapped);
+ } else {
+ support::endian::Writer<support::big>(OS).write<uint64_t>(Bits);
+ }
+ break;
+ default:
+ llvm_unreachable ("Invalid instruction size");
}
++MCNumEmitted; // Keep track of the # of mi's emitted.
};
} // end anonymous namespace
-
+
MCCodeEmitter *llvm::createPPCMCCodeEmitter(const MCInstrInfo &MCII,
const MCRegisterInfo &MRI,
- const MCSubtargetInfo &STI,
MCContext &Ctx) {
return new PPCMCCodeEmitter(MCII, Ctx);
}
if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO, Fixups, STI);
// Add a fixup for the branch target.
- Fixups.push_back(MCFixup::Create(0, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(0, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_br24));
return 0;
}
if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO, Fixups, STI);
// Add a fixup for the branch target.
- Fixups.push_back(MCFixup::Create(0, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(0, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_brcond14));
return 0;
}
if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO, Fixups, STI);
// Add a fixup for the branch target.
- Fixups.push_back(MCFixup::Create(0, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(0, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_br24abs));
return 0;
}
if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO, Fixups, STI);
// Add a fixup for the branch target.
- Fixups.push_back(MCFixup::Create(0, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(0, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_brcond14abs));
return 0;
}
if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO, Fixups, STI);
// Add a fixup for the immediate field.
- Fixups.push_back(MCFixup::Create(2, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(IsLittleEndian? 0 : 2, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_half16));
return 0;
}
return (getMachineOpValue(MI, MO, Fixups, STI) & 0xFFFF) | RegBits;
// Add a fixup for the displacement field.
- Fixups.push_back(MCFixup::Create(2, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(IsLittleEndian? 0 : 2, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_half16));
return RegBits;
}
return ((getMachineOpValue(MI, MO, Fixups, STI) >> 2) & 0x3FFF) | RegBits;
// Add a fixup for the displacement field.
- Fixups.push_back(MCFixup::Create(2, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(IsLittleEndian? 0 : 2, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_half16ds));
return RegBits;
}
+unsigned PPCMCCodeEmitter::getSPE8DisEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI)
+ const {
+ // Encode (imm, reg) as a spe8dis, which has the low 5-bits of (imm / 8)
+ // as the displacement and the next 5 bits as the register #.
+ assert(MI.getOperand(OpNo+1).isReg());
+ uint32_t RegBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups, STI) << 5;
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+ assert(MO.isImm());
+ uint32_t Imm = getMachineOpValue(MI, MO, Fixups, STI) >> 3;
+ return reverseBits(Imm | RegBits) >> 22;
+}
+
+
+unsigned PPCMCCodeEmitter::getSPE4DisEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI)
+ const {
+ // Encode (imm, reg) as a spe4dis, which has the low 5-bits of (imm / 4)
+ // as the displacement and the next 5 bits as the register #.
+ assert(MI.getOperand(OpNo+1).isReg());
+ uint32_t RegBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups, STI) << 5;
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+ assert(MO.isImm());
+ uint32_t Imm = getMachineOpValue(MI, MO, Fixups, STI) >> 2;
+ return reverseBits(Imm | RegBits) >> 22;
+}
+
+
+unsigned PPCMCCodeEmitter::getSPE2DisEncoding(const MCInst &MI, unsigned OpNo,
+ SmallVectorImpl<MCFixup> &Fixups,
+ const MCSubtargetInfo &STI)
+ const {
+ // Encode (imm, reg) as a spe2dis, which has the low 5-bits of (imm / 2)
+ // as the displacement and the next 5 bits as the register #.
+ assert(MI.getOperand(OpNo+1).isReg());
+ uint32_t RegBits = getMachineOpValue(MI, MI.getOperand(OpNo+1), Fixups, STI) << 5;
+
+ const MCOperand &MO = MI.getOperand(OpNo);
+ assert(MO.isImm());
+ uint32_t Imm = getMachineOpValue(MI, MO, Fixups, STI) >> 1;
+ return reverseBits(Imm | RegBits) >> 22;
+}
+
+
unsigned PPCMCCodeEmitter::getTLSRegEncoding(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups,
const MCSubtargetInfo &STI) const {
// Add a fixup for the TLS register, which simply provides a relocation
// hint to the linker that this statement is part of a relocation sequence.
// Return the thread-pointer register's encoding.
- Fixups.push_back(MCFixup::Create(0, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(0, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_nofixup));
- Triple TT(STI.getTargetTriple());
- bool isPPC64 = TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le;
+ const TargetTuple &TT = STI.getTargetTuple();
+ bool isPPC64 = TT.getArch() == TargetTuple::ppc64 ||
+ TT.getArch() == TargetTuple::ppc64le;
return CTX.getRegisterInfo()->getEncodingValue(isPPC64 ? PPC::X13 : PPC::R2);
}
// (__tls_get_addr), which we create via getDirectBrEncoding as usual,
// and one for the TLSGD or TLSLD symbol, which is emitted here.
const MCOperand &MO = MI.getOperand(OpNo+1);
- Fixups.push_back(MCFixup::Create(0, MO.getExpr(),
+ Fixups.push_back(MCFixup::create(0, MO.getExpr(),
(MCFixupKind)PPC::fixup_ppc_nofixup));
return getDirectBrEncoding(MI, OpNo, Fixups, STI);
}
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