path: root/js/src/jit/arm/LIR-arm.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 * 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_arm_LIR_arm_h
#define jit_arm_LIR_arm_h

namespace js {
namespace jit {

class LBoxFloatingPoint : public LInstructionHelper<2, 1, 1> {
  MIRType type_;

 public:
  LIR_HEADER(BoxFloatingPoint);

  LBoxFloatingPoint(const LAllocation& in, const LDefinition& temp,
                    MIRType type)
      : LInstructionHelper(classOpcode), type_(type) {
    setOperand(0, in);
    setTemp(0, temp);
  }

  MIRType type() const { return type_; }
  const char* extraName() const { return StringFromMIRType(type_); }
};

class LUnbox : public LInstructionHelper<1, 2, 0> {
 public:
  LIR_HEADER(Unbox);

  LUnbox() : LInstructionHelper(classOpcode) {}

  MUnbox* mir() const { return mir_->toUnbox(); }
  const LAllocation* payload() { return getOperand(0); }
  const LAllocation* type() { return getOperand(1); }
  const char* extraName() const { return StringFromMIRType(mir()->type()); }
};

class LUnboxFloatingPoint : public LInstructionHelper<1, 2, 0> {
  MIRType type_;

 public:
  LIR_HEADER(UnboxFloatingPoint);

  static const size_t Input = 0;

  LUnboxFloatingPoint(const LBoxAllocation& input, MIRType type)
      : LInstructionHelper(classOpcode), type_(type) {
    setBoxOperand(Input, input);
  }

  MUnbox* mir() const { return mir_->toUnbox(); }

  MIRType type() const { return type_; }
  const char* extraName() const { return StringFromMIRType(type_); }
};

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

  explicit 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)

  explicit 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 LDivOrModI64
    : public LCallInstructionHelper<INT64_PIECES, INT64_PIECES * 2 + 1, 0> {
 public:
  LIR_HEADER(DivOrModI64)

  static const size_t Lhs = 0;
  static const size_t Rhs = INT64_PIECES;
  static const size_t Tls = 2 * INT64_PIECES;

  LDivOrModI64(const LInt64Allocation& lhs, const LInt64Allocation& rhs,
               const LAllocation& tls)
      : LCallInstructionHelper(classOpcode) {
    setInt64Operand(Lhs, lhs);
    setInt64Operand(Rhs, rhs);
    setOperand(Tls, tls);
  }

  MDefinition* mir() const {
    MOZ_ASSERT(mir_->isWasmBuiltinDivI64() || mir_->isWasmBuiltinModI64());
    return mir_;
  }
  bool canBeDivideByZero() const {
    if (mir_->isWasmBuiltinModI64()) {
      return mir_->toWasmBuiltinModI64()->canBeDivideByZero();
    }
    return mir_->toWasmBuiltinDivI64()->canBeDivideByZero();
  }
  bool canBeNegativeOverflow() const {
    if (mir_->isWasmBuiltinModI64()) {
      return mir_->toWasmBuiltinModI64()->canBeNegativeDividend();
    }
    return mir_->toWasmBuiltinDivI64()->canBeNegativeOverflow();
  }
  wasm::BytecodeOffset bytecodeOffset() const {
    MOZ_ASSERT(mir_->isWasmBuiltinDivI64() || mir_->isWasmBuiltinModI64());
    if (mir_->isWasmBuiltinModI64()) {
      return mir_->toWasmBuiltinModI64()->bytecodeOffset();
    }
    return mir_->toWasmBuiltinDivI64()->bytecodeOffset();
  }
};

class LUDivOrModI64
    : public LCallInstructionHelper<INT64_PIECES, INT64_PIECES * 2 + 1, 0> {
 public:
  LIR_HEADER(UDivOrModI64)

  static const size_t Lhs = 0;
  static const size_t Rhs = INT64_PIECES;
  static const size_t Tls = 2 * INT64_PIECES;

  LUDivOrModI64(const LInt64Allocation& lhs, const LInt64Allocation& rhs,
                const LAllocation& tls)
      : LCallInstructionHelper(classOpcode) {
    setInt64Operand(Lhs, lhs);
    setInt64Operand(Rhs, rhs);
    setOperand(Tls, tls);
  }

  MDefinition* mir() const {
    MOZ_ASSERT(mir_->isWasmBuiltinDivI64() || mir_->isWasmBuiltinModI64());
    return mir_;
  }
  bool canBeDivideByZero() const {
    if (mir_->isWasmBuiltinModI64()) {
      return mir_->toWasmBuiltinModI64()->canBeDivideByZero();
    }
    return mir_->toWasmBuiltinDivI64()->canBeDivideByZero();
  }
  bool canBeNegativeOverflow() const {
    if (mir_->isWasmBuiltinModI64()) {
      return mir_->toWasmBuiltinModI64()->canBeNegativeDividend();
    }
    return mir_->toWasmBuiltinDivI64()->canBeNegativeOverflow();
  }
  wasm::BytecodeOffset bytecodeOffset() const {
    MOZ_ASSERT(mir_->isWasmBuiltinDivI64() || mir_->isWasmBuiltinModI64());
    if (mir_->isWasmBuiltinModI64()) {
      return mir_->toWasmBuiltinModI64()->bytecodeOffset();
    }
    return mir_->toWasmBuiltinDivI64()->bytecodeOffset();
  }
};

// LSoftDivI is a software divide for ARM cores that don't support a hardware
// divide instruction, implemented as a C++ native call.
class LSoftDivI : public LBinaryCallInstructionHelper<1, 0> {
 public:
  LIR_HEADER(SoftDivI);

  LSoftDivI(const LAllocation& lhs, const LAllocation& rhs)
      : LBinaryCallInstructionHelper(classOpcode) {
    setOperand(0, lhs);
    setOperand(1, rhs);
  }

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

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

 public:
  LIR_HEADER(DivPowTwoI)

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

  const LAllocation* numerator() { return getOperand(0); }

  int32_t shift() { return shift_; }

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

class LModI : public LBinaryMath<0> {
 public:
  LIR_HEADER(ModI);

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

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

class LSoftModI : public LBinaryCallInstructionHelper<1, 1> {
 public:
  LIR_HEADER(SoftModI);

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

  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);
  int32_t shift() { return shift_; }

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

  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& temp1,
            const LDefinition& temp2, int32_t shift)
      : LInstructionHelper(classOpcode), shift_(shift) {
    setOperand(0, lhs);
    setTemp(0, temp1);
    setTemp(1, temp2);
  }

  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, 1> {
 public:
  LIR_HEADER(TableSwitch);

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

// Takes a tableswitch with an integer to decide.
class LTableSwitchV : public LInstructionHelper<0, BOX_PIECES, 2> {
 public:
  LIR_HEADER(TableSwitchV);

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

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

  LMulI() : LBinaryMath(classOpcode) {}

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

class LUDiv : public LBinaryMath<0> {
 public:
  LIR_HEADER(UDiv);

  LUDiv() : LBinaryMath(classOpcode) {}

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

class LUMod : public LBinaryMath<0> {
 public:
  LIR_HEADER(UMod);

  LUMod() : LBinaryMath(classOpcode) {}

  MMod* mir() { return mir_->toMod(); }
};

class LSoftUDivOrMod : public LBinaryCallInstructionHelper<1, 0> {
 public:
  LIR_HEADER(SoftUDivOrMod);

  LSoftUDivOrMod(const LAllocation& lhs, const LAllocation& rhs)
      : LBinaryCallInstructionHelper(classOpcode) {
    setOperand(0, lhs);
    setOperand(1, rhs);
  }

  MInstruction* mir() { return mir_->toInstruction(); }
};

class LWasmTruncateToInt64 : public LCallInstructionHelper<INT64_PIECES, 2, 0> {
  static const size_t Input = 0;
  static const size_t Tls = 1;

 public:
  LIR_HEADER(WasmTruncateToInt64);

  LWasmTruncateToInt64(const LAllocation& in, const LAllocation& tls)
      : LCallInstructionHelper(classOpcode) {
    setOperand(Input, in);
    setOperand(Tls, tls);
  }

  LAllocation* input() { return getOperand(Input); }
  LAllocation* tls() { return getOperand(Tls); }

  MWasmBuiltinTruncateToInt64* mir() const {
    return mir_->toWasmBuiltinTruncateToInt64();
  }
};

class LInt64ToFloatingPointCall
    : public LCallInstructionHelper<1, INT64_PIECES + 1, 0> {
 public:
  LIR_HEADER(Int64ToFloatingPointCall);

  static const size_t Input = 0;
  static const size_t Tls = INT64_PIECES;

  LInt64ToFloatingPointCall(const LInt64Allocation& in, const LAllocation& tls)
      : LCallInstructionHelper(classOpcode) {
    setInt64Operand(Input, in);
    setOperand(Tls, tls);
  }

  LAllocation* input() { return getOperand(Input); }
  LAllocation* tls() { return getOperand(Tls); }

  MBuiltinInt64ToFloatingPoint* mir() const {
    return mir_->toBuiltinInt64ToFloatingPoint();
  }
};

namespace details {

// Base class for the int64 and non-int64 variants.
template <size_t NumDefs>
class LWasmUnalignedLoadBase : public details::LWasmLoadBase<NumDefs, 4> {
 public:
  typedef LWasmLoadBase<NumDefs, 4> Base;
  explicit LWasmUnalignedLoadBase(LNode::Opcode opcode, const LAllocation& ptr,
                                  const LDefinition& ptrCopy,
                                  const LDefinition& temp1,
                                  const LDefinition& temp2,
                                  const LDefinition& temp3)
      : Base(opcode, ptr, LAllocation()) {
    Base::setTemp(0, ptrCopy);
    Base::setTemp(1, temp1);
    Base::setTemp(2, temp2);
    Base::setTemp(3, temp3);
  }

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

}  // namespace details

class LWasmUnalignedLoad : public details::LWasmUnalignedLoadBase<1> {
 public:
  explicit LWasmUnalignedLoad(const LAllocation& ptr,
                              const LDefinition& ptrCopy,
                              const LDefinition& temp1,
                              const LDefinition& temp2,
                              const LDefinition& temp3)
      : LWasmUnalignedLoadBase(classOpcode, ptr, ptrCopy, temp1, temp2, temp3) {
  }
  LIR_HEADER(WasmUnalignedLoad);
};

class LWasmUnalignedLoadI64
    : public details::LWasmUnalignedLoadBase<INT64_PIECES> {
 public:
  explicit LWasmUnalignedLoadI64(const LAllocation& ptr,
                                 const LDefinition& ptrCopy,
                                 const LDefinition& temp1,
                                 const LDefinition& temp2,
                                 const LDefinition& temp3)
      : LWasmUnalignedLoadBase(classOpcode, ptr, ptrCopy, temp1, temp2, temp3) {
  }
  LIR_HEADER(WasmUnalignedLoadI64);
};

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 uint32_t ValueIndex = 1;

  LWasmUnalignedStoreBase(LNode::Opcode opcode, const LAllocation& ptr,
                          const LDefinition& ptrCopy,
                          const LDefinition& valueHelper)
      : Base(opcode) {
    Base::setOperand(0, ptr);
    Base::setTemp(0, ptrCopy);
    Base::setTemp(1, valueHelper);
  }
  MWasmStore* mir() const { return Base::mir_->toWasmStore(); }
  const LDefinition* ptrCopy() { return Base::getTemp(0); }
  const LDefinition* valueHelper() { return Base::getTemp(1); }
};

}  // namespace details

class LWasmUnalignedStore : public details::LWasmUnalignedStoreBase<2> {
 public:
  LIR_HEADER(WasmUnalignedStore);
  LWasmUnalignedStore(const LAllocation& ptr, const LAllocation& value,
                      const LDefinition& ptrCopy,
                      const LDefinition& valueHelper)
      : LWasmUnalignedStoreBase(classOpcode, ptr, ptrCopy, valueHelper) {
    setOperand(1, value);
  }
};

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

class LWasmAtomicLoadI64 : public LInstructionHelper<INT64_PIECES, 1, 0> {
 public:
  LIR_HEADER(WasmAtomicLoadI64);

  explicit LWasmAtomicLoadI64(const LAllocation& ptr)
      : LInstructionHelper(classOpcode) {
    setOperand(0, ptr);
  }

  MWasmLoad* mir() const { return mir_->toWasmLoad(); }
  const LAllocation* ptr() { return getOperand(0); }
};

class LWasmAtomicStoreI64 : public LInstructionHelper<0, 1 + INT64_PIECES, 2> {
 public:
  LIR_HEADER(WasmAtomicStoreI64);

  LWasmAtomicStoreI64(const LAllocation& ptr, const LInt64Allocation& value,
                      const LDefinition& tmpLow, const LDefinition& tmpHigh)
      : LInstructionHelper(classOpcode) {
    setOperand(0, ptr);
    setInt64Operand(1, value);
    setTemp(0, tmpLow);
    setTemp(1, tmpHigh);
  }

  MWasmStore* mir() const { return mir_->toWasmStore(); }
  const LAllocation* ptr() { return getOperand(0); }
  const LInt64Allocation value() { return getInt64Operand(1); }
  const LDefinition* tmpLow() { return getTemp(0); }
  const LDefinition* tmpHigh() { return getTemp(1); }
};

class LWasmCompareExchangeI64
    : public LInstructionHelper<INT64_PIECES, 1 + 2 * INT64_PIECES, 0> {
 public:
  LIR_HEADER(WasmCompareExchangeI64);

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

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

class LWasmAtomicBinopI64
    : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES, 2> {
  const wasm::MemoryAccessDesc& access_;
  AtomicOp op_;

 public:
  LIR_HEADER(WasmAtomicBinopI64);

  LWasmAtomicBinopI64(const LAllocation& ptr, const LInt64Allocation& value,
                      const LDefinition& tmpLow, const LDefinition& tmpHigh,
                      const wasm::MemoryAccessDesc& access, AtomicOp op)
      : LInstructionHelper(classOpcode), access_(access), op_(op) {
    setOperand(0, ptr);
    setInt64Operand(1, value);
    setTemp(0, tmpLow);
    setTemp(1, tmpHigh);
  }

  const LAllocation* ptr() { return getOperand(0); }
  const LInt64Allocation value() { return getInt64Operand(1); }
  const wasm::MemoryAccessDesc& access() { return access_; }
  AtomicOp operation() const { return op_; }
  const LDefinition* tmpLow() { return getTemp(0); }
  const LDefinition* tmpHigh() { return getTemp(1); }
};

class LWasmAtomicExchangeI64
    : public LInstructionHelper<INT64_PIECES, 1 + INT64_PIECES, 0> {
  const wasm::MemoryAccessDesc& access_;

 public:
  LIR_HEADER(WasmAtomicExchangeI64);

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

  const LAllocation* ptr() { return getOperand(0); }
  const LInt64Allocation value() { return getInt64Operand(1); }
  const wasm::MemoryAccessDesc& access() { return access_; }
};

}  // namespace jit
}  // namespace js

#endif /* jit_arm_LIR_arm_h */