src/tint/lang/core/ir/unary.h

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#ifndef SRC_TINT_LANG_CORE_IR_UNARY_H_
#define SRC_TINT_LANG_CORE_IR_UNARY_H_

#include <string>

#include "src/tint/lang/core/ir/operand_instruction.h"
#include "src/tint/utils/rtti/castable.h"

namespace tint::core::ir {

/// A unary operator.
enum class UnaryOp {
    kComplement,
    kNegation,
};

/// A unary instruction in the IR.
class Unary final : public Castable<Unary, OperandInstruction<1, 1>> {
  public:
    /// The offset in Operands() for the value
    static constexpr size_t kValueOperandOffset = 0;

    /// Constructor (no results, no operands)
    Unary();

    /// Constructor
    /// @param result the result value
    /// @param op the unary operator
    /// @param val the input value for the instruction
    Unary(InstructionResult* result, UnaryOp op, Value* val);
    ~Unary() override;

    /// @copydoc Instruction::Clone()
    Unary* Clone(CloneContext& ctx) override;

    /// @returns the value for the instruction
    Value* Val() { return operands_[kValueOperandOffset]; }

    /// @returns the value for the instruction
    const Value* Val() const { return operands_[kValueOperandOffset]; }

    /// @returns the unary operator
    UnaryOp Op() const { return op_; }

    /// @param op the new unary operator
    void SetOp(UnaryOp op) { op_ = op; }

    /// @returns the friendly name for the instruction
    std::string FriendlyName() const override { return "unary"; }

  private:
    UnaryOp op_ = UnaryOp::kComplement;
};

/// @param kind the enum value
/// @returns the string for the given enum value
std::string_view ToString(UnaryOp kind);

/// Emits the name of the intrinsic type.
template <typename STREAM, typename = traits::EnableIfIsOStream<STREAM>>
auto& operator<<(STREAM& out, UnaryOp kind) {
    return out << ToString(kind);
}

}  // namespace tint::core::ir

#endif  // SRC_TINT_LANG_CORE_IR_UNARY_H_