src/tint/lang/hlsl/ir/ternary.h

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#ifndef SRC_TINT_LANG_HLSL_IR_TERNARY_H_
#define SRC_TINT_LANG_HLSL_IR_TERNARY_H_

#include <string>

#include "src/tint/lang/core/ir/call.h"
#include "src/tint/lang/core/ir/clone_context.h"
#include "src/tint/lang/core/ir/instruction_result.h"
#include "src/tint/lang/core/ir/value.h"
#include "src/tint/utils/rtti/castable.h"

namespace tint::hlsl::ir {

/// A ternary instruction in the IR.
class Ternary final : public Castable<Ternary, core::ir::Call> {
  public:
    /// Constructor
    ///
    /// Note, the args are in the order of (`false`, `true`, `compare`) to match select.
    /// Note, the ternary evaluates all branches, not just the selected branch.
    Ternary(core::ir::InstructionResult* result, VectorRef<core::ir::Value*> args);
    ~Ternary() override;

    /// @copydoc Instruction::Clone()
    Ternary* Clone(core::ir::CloneContext& ctx) override;

    /// @returns the false value
    core::ir::Value* False() const { return operands_[ArgsOperandOffset() + 0]; }

    /// @returns the true value
    core::ir::Value* True() const { return operands_[ArgsOperandOffset() + 1]; }

    /// @returns the compare value
    core::ir::Value* Cmp() const { return operands_[ArgsOperandOffset() + 2]; }

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

}  // namespace tint::hlsl::ir

#endif  // SRC_TINT_LANG_HLSL_IR_TERNARY_H_