TheRock/rocm-libraries/shared/rocroller/lib/include/rocRoller/CodeGen/Arithmetic/Subtract.hpp

// Copyright Advanced Micro Devices, Inc., or its affiliates.
// SPDX-License-Identifier: MIT

#pragma once

#include <rocRoller/CodeGen/Arithmetic/ArithmeticGenerator.hpp>

namespace rocRoller
{

    // GetGenerator function will return the Generator to use based on the provided arguments.
    template <>
    std::shared_ptr<BinaryArithmeticGenerator<Expression::Subtract>>
        GetGenerator<Expression::Subtract>(Register::ValuePtr dst,
                                           Register::ValuePtr lhs,
                                           Register::ValuePtr rhs,
                                           Expression::Subtract const&);

    // Templated Generator class based on the register type and datatype.
    template <Register::Type REGISTER_TYPE, DataType DATATYPE>
    class SubtractGenerator : public BinaryArithmeticGenerator<Expression::Subtract>
    {
    public:
        SubtractGenerator(ContextPtr c)
            : BinaryArithmeticGenerator<Expression::Subtract>(c)
        {
        }

        // Match function required by Component system for selecting the correct
        // generator.
        static bool Match(Argument const& arg)
        {
            ContextPtr     ctx;
            Register::Type registerType;
            DataType       dataType;

            std::tie(ctx, registerType, dataType) = arg;

            // Int64 and UInt64 will generate the same instructions
            if constexpr(DATATYPE == DataType::Int64)
                return registerType == REGISTER_TYPE
                       && (dataType == DataType::Int64 || dataType == DataType::UInt64);
            else
                return registerType == REGISTER_TYPE && dataType == DATATYPE;
        }

        // Build function required by Component system to return the generator.
        static std::shared_ptr<Base> Build(Argument const& arg)
        {
            if(!Match(arg))
                return nullptr;

            return std::make_shared<SubtractGenerator<REGISTER_TYPE, DATATYPE>>(std::get<0>(arg));
        }

        // Method to generate instructions
        Generator<Instruction> generate(Register::ValuePtr dst,
                                        Register::ValuePtr lhs,
                                        Register::ValuePtr rhs,
                                        Expression::Subtract const&);

        inline static const std::string Name = concatenate(
            "SubtractGenerator<", toString(REGISTER_TYPE), ", ", toString(DATATYPE), ">");
    };

    // Specializations for supported Register Type / DataType combinations
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Scalar, DataType::Int32>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Vector, DataType::Int32>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Scalar, DataType::UInt32>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Vector, DataType::UInt32>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Scalar, DataType::Int64>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Vector, DataType::Int64>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Vector, DataType::Float>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
    template <>
    Generator<Instruction> SubtractGenerator<Register::Type::Vector, DataType::Double>::generate(
        Register::ValuePtr dst,
        Register::ValuePtr lhs,
        Register::ValuePtr rhs,
        Expression::Subtract const&);
}