File: LIR-mips-shared.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef jit_mips_shared_LIR_mips_shared_h
#define jit_mips_shared_LIR_mips_shared_h

namespace js {
namespace jit {

// Convert a 32-bit unsigned integer to a double.
class LWasmUint32ToDouble : public LInstructionHelper<1, 1, 0> {
 public:
  LIR_HEADER(WasmUint32ToDouble)

  LWasmUint32ToDouble(const LAllocation& input)
      : LInstructionHelper(classOpcode) {
    setOperand(0, input);
  }
};

// Convert a 32-bit unsigned integer to a float32.
class LWasmUint32ToFloat32 : public LInstructionHelper<1, 1, 0> {
 public:
  LIR_HEADER(WasmUint32ToFloat32)

  LWasmUint32ToFloat32(const LAllocation& input)
      : LInstructionHelper(classOpcode) {
    setOperand(0, input);
  }
};

class LDivI : public LBinaryMath<1> {
 public:
  LIR_HEADER(DivI);

  LDivI(const LAllocation& lhs, const LAllocation& rhs, const LDefinition& temp)
      : LBinaryMath(classOpcode) {
    setOperand(0, lhs);
    setOperand(1, rhs);
    setTemp(0, temp);
  }

  MDiv* mir() const { return mir_->toDiv(); }
};

class LDivPowTwoI : public LInstructionHelper<1, 1, 1> {
  const int32_t shift_;

 public:
  LIR_HEADER(DivPowTwoI)

  LDivPowTwoI(const LAllocation& lhs, int32_t shift, const LDefinition& temp)
      : LInstructionHelper(classOpcode), shift_(shift) {
    setOperand(0, lhs);
    setTemp(0, temp);
  }

  const LAllocation* numerator() { return getOperand(0); }
  int32_t shift() const { return shift_; }
  MDiv* mir() const { return mir_->toDiv(); }
};

class LModI : public LBinaryMath<1> {
 public:
  LIR_HEADER(ModI);

  LModI(const LAllocation& lhs, const LAllocation& rhs,
        const LDefinition& callTemp)
      : LBinaryMath(classOpcode) {
    setOperand(0, lhs);
    setOperand(1, rhs);
    setTemp(0, callTemp);
  }

  const LDefinition* callTemp() { return getTemp(0); }
  MMod* mir() const { return mir_->toMod(); }
};

class LModPowTwoI : public LInstructionHelper<1, 1, 0> {
  const int32_t shift_;

 public:
  LIR_HEADER(ModPowTwoI);

  LModPowTwoI(const LAllocation& lhs, int32_t shift)
      : LInstructionHelper(classOpcode), shift_(shift) {
    setOperand(0, lhs);
  }

  int32_t shift() const { return shift_; }
  MMod* mir() const { return mir_->toMod(); }
};

class LModMaskI : public LInstructionHelper<1, 1, 2> {
  const int32_t shift_;

 public:
  LIR_HEADER(ModMaskI);

  LModMaskI(const LAllocation& lhs, const LDefinition& temp0,
            const LDefinition& temp1, int32_t shift)
      : LInstructionHelper(classOpcode), shift_(shift) {
    setOperand(0, lhs);
    setTemp(0, temp0);
    setTemp(1, temp1);
  }

  int32_t shift() const { return shift_; }
  MMod* mir() const { return mir_->toMod(); }
};

// Takes a tableswitch with an integer to decide
class LTableSwitch : public LInstructionHelper<0, 1, 2> {
 public:
  LIR_HEADER(TableSwitch);

  LTableSwitch(const LAllocation& in, const LDefinition& inputCopy,
               const LDefinition& jumpTablePointer, MTableSwitch* ins)
      : LInstructionHelper(classOpcode) {
    setOperand(0, in);
    setTemp(0, inputCopy);
    setTemp(1, jumpTablePointer);
    setMir(ins);
  }

  MTableSwitch* mir() const { return mir_->toTableSwitch(); }
  const LAllocation* index() { return getOperand(0); }
  const LDefinition* tempInt() { return getTemp(0); }
  // This is added to share the same CodeGenerator prefixes.
  const LDefinition* tempPointer() { return getTemp(1); }
};

// Takes a tableswitch with an integer to decide
class LTableSwitchV : public LInstructionHelper<0, BOX_PIECES, 3> {
 public:
  LIR_HEADER(TableSwitchV);

  LTableSwitchV(const LBoxAllocation& input, const LDefinition& inputCopy,
                const LDefinition& floatCopy,
                const LDefinition& jumpTablePointer, MTableSwitch* ins)
      : LInstructionHelper(classOpcode) {
    setBoxOperand(InputValue, input);
    setTemp(0, inputCopy);
    setTemp(1, floatCopy);
    setTemp(2, jumpTablePointer);
    setMir(ins);
  }

  MTableSwitch* mir() const { return mir_->toTableSwitch(); }

  static const size_t InputValue = 0;

  const LDefinition* tempInt() { return getTemp(0); }
  const LDefinition* tempFloat() { return getTemp(1); }
  const LDefinition* tempPointer() { return getTemp(2); }
};

class LMulI : public LBinaryMath<0> {
 public:
  LIR_HEADER(MulI);

  LMulI() : LBinaryMath(classOpcode) {}

  MMul* mir() { return mir_->toMul(); }
};

class LUDivOrMod : public LBinaryMath<0> {
 public:
  LIR_HEADER(UDivOrMod);

  LUDivOrMod() : LBinaryMath(classOpcode) {}

  MBinaryArithInstruction* mir() const {
    MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
    return static_cast<MBinaryArithInstruction*>(mir_);
  }

  bool canBeDivideByZero() const {
    if (mir_->isMod()) return mir_->toMod()->canBeDivideByZero();
    return mir_->toDiv()->canBeDivideByZero();
  }

  bool trapOnError() const {
    if (mir_->isMod()) return mir_->toMod()->trapOnError();
    return mir_->toDiv()->trapOnError();
  }

  wasm::BytecodeOffset bytecodeOffset() const {
    MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
    if (mir_->isMod()) return mir_->toMod()->bytecodeOffset();
    return mir_->toDiv()->bytecodeOffset();
  }
};

namespace details {

// Base class for the int64 and non-int64 variants.
template <size_t NumDefs>
class LWasmUnalignedLoadBase : public details::LWasmLoadBase<NumDefs, 2> {
 public:
  typedef LWasmLoadBase<NumDefs, 2> Base;

  explicit LWasmUnalignedLoadBase(LNode::Opcode opcode, const LAllocation& ptr,
                                  const LDefinition& valueHelper)
      : Base(opcode, ptr, LAllocation()) {
    Base::setTemp(0, LDefinition::BogusTemp());
    Base::setTemp(1, valueHelper);
  }

  const LAllocation* ptr() { return Base::getOperand(0); }
  const LDefinition* ptrCopy() { return Base::getTemp(0); }
};

}  // namespace details

class LWasmUnalignedLoad : public details::LWasmUnalignedLoadBase<1> {
 public:
  LIR_HEADER(WasmUnalignedLoad);

  explicit LWasmUnalignedLoad(const LAllocation& ptr,
                              const LDefinition& valueHelper)
      : LWasmUnalignedLoadBase(classOpcode, ptr, valueHelper) {}
};

class LWasmUnalignedLoadI64
    : public details::LWasmUnalignedLoadBase<INT64_PIECES> {
 public:
  LIR_HEADER(WasmUnalignedLoadI64);

  explicit LWasmUnalignedLoadI64(const LAllocation& ptr,
                                 const LDefinition& valueHelper)
      : LWasmUnalignedLoadBase(classOpcode, ptr, valueHelper) {}
};

namespace details {

// Base class for the int64 and non-int64 variants.
template <size_t NumOps>
class LWasmUnalignedStoreBase : public LInstructionHelper<0, NumOps, 2> {
 public:
  typedef LInstructionHelper<0, NumOps, 2> Base;

  static const size_t PtrIndex = 0;
  static const size_t ValueIndex = 1;

  LWasmUnalignedStoreBase(LNode::Opcode opcode, const LAllocation& ptr,
                          const LDefinition& valueHelper)
      : Base(opcode) {
    Base::setOperand(0, ptr);
    Base::setTemp(0, LDefinition::BogusTemp());
    Base::setTemp(1, valueHelper);
  }

  MWasmStore* mir() const { return Base::mir_->toWasmStore(); }
  const LAllocation* ptr() { return Base::getOperand(PtrIndex); }
  const LDefinition* ptrCopy() { return Base::getTemp(0); }
};

}  // namespace details

class LWasmUnalignedStore : public details::LWasmUnalignedStoreBase<2> {
 public:
  LIR_HEADER(WasmUnalignedStore);

  LWasmUnalignedStore(const LAllocation& ptr, const LAllocation& value,
                      const LDefinition& valueHelper)
      : LWasmUnalignedStoreBase(classOpcode, ptr, valueHelper) {
    setOperand(1, value);
  }

  const LAllocation* value() { return Base::getOperand(ValueIndex); }
};

class LWasmUnalignedStoreI64
    : public details::LWasmUnalignedStoreBase<1 + INT64_PIECES> {
 public:
  LIR_HEADER(WasmUnalignedStoreI64);
  LWasmUnalignedStoreI64(const LAllocation& ptr, const LInt64Allocation& value,
                         const LDefinition& valueHelper)
      : LWasmUnalignedStoreBase(classOpcode, ptr, valueHelper) {
    setInt64Operand(1, value);
  }

  const LInt64Allocation value() { return getInt64Operand(ValueIndex); }
};

class LWasmCompareExchangeI64
    : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES + INT64_PIECES,
                                0> {
 public:
  LIR_HEADER(WasmCompareExchangeI64);

  LWasmCompareExchangeI64(const LAllocation& ptr,
                          const LInt64Allocation& oldValue,
                          const LInt64Allocation& newValue)
      : LInstructionHelper(classOpcode) {
    setOperand(0, ptr);
    setInt64Operand(1, oldValue);
    setInt64Operand(1 + INT64_PIECES, newValue);
  }

  const LAllocation* ptr() { return getOperand(0); }
  const LInt64Allocation oldValue() { return getInt64Operand(1); }
  const LInt64Allocation newValue() {
    return getInt64Operand(1 + INT64_PIECES);
  }
  const MWasmCompareExchangeHeap* mir() const {
    return mir_->toWasmCompareExchangeHeap();
  }
};

class LWasmAtomicExchangeI64
    : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES, 0> {
 public:
  LIR_HEADER(WasmAtomicExchangeI64);

  LWasmAtomicExchangeI64(const LAllocation& ptr, const LInt64Allocation& value)
      : LInstructionHelper(classOpcode) {
    setOperand(0, ptr);
    setInt64Operand(1, value);
  }

  const LAllocation* ptr() { return getOperand(0); }
  const LInt64Allocation value() { return getInt64Operand(1); }
  const MWasmAtomicExchangeHeap* mir() const {
    return mir_->toWasmAtomicExchangeHeap();
  }
};

class LWasmAtomicBinopI64
    : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES, 2> {
 public:
  LIR_HEADER(WasmAtomicBinopI64);

  LWasmAtomicBinopI64(const LAllocation& ptr, const LInt64Allocation& value)
      : LInstructionHelper(classOpcode) {
    setOperand(0, ptr);
    setInt64Operand(1, value);
  }

  const LAllocation* ptr() { return getOperand(0); }
  const LInt64Allocation value() { return getInt64Operand(1); }
  const MWasmAtomicBinopHeap* mir() const {
    return mir_->toWasmAtomicBinopHeap();
  }
};

}  // namespace jit
}  // namespace js

#endif /* jit_mips_shared_LIR_mips_shared_h */