SExt.h

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// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <format>
#include <memory>
#include <string>
#include <unordered_set>
#include <utility>
 
#include "mini-llvm/mir/ImmediateOperand.h"
#include "mini-llvm/mir/Instruction.h"
#include "mini-llvm/mir/InstructionVisitor.h"
#include "mini-llvm/mir/MemoryOperand.h"
#include "mini-llvm/mir/Register.h"
#include "mini-llvm/mir/RegisterClass.h"
#include "mini-llvm/mir/RegisterOperand.h"
#include "mini-llvm/utils/Compiler.h"
#include "mini-llvm/utils/Memory.h"
 
namespace mini_llvm::mir {
 
class MINI_LLVM_EXPORT SExt : public Instruction {
public:
    SExt(int dstWidth, int srcWidth, std::shared_ptr<Register> dst, std::shared_ptr<Register> src)
        : dstWidth_(dstWidth),
          srcWidth_(srcWidth),
          dst_(RegisterClass::kGPR, std::move(dst)),
          src_(RegisterClass::kGPR, std::move(src)) {}
 
    int dstWidth() const {
        return dstWidth_;
    }
 
    int srcWidth() const {
        return srcWidth_;
    }
 
    template <typename Self>
    auto &dst(this Self &&self) {
        return self.dst_;
    }
 
    template <typename Self>
    auto &src(this Self &&self) {
        return self.src_;
    }
 
    std::unordered_set<const RegisterOperand *> regOps() const override {
        return {&dst(), &src()};
    }
 
    std::unordered_set<const RegisterOperand *> dsts() const override {
        return {&dst()};
    }
 
    std::unordered_set<const RegisterOperand *> srcs() const override {
        return {&src()};
    }
 
    std::unordered_set<const ImmediateOperand *> immOps() const override {
        return {};
    }
 
    std::unordered_set<const MemoryOperand *> memOps() const override {
        return {};
    }
 
    bool hasSideEffects() const override {
        return false;
    }
 
    std::string format() const override {
        return std::format("SEXT i{} i{} {}, {}", dstWidth() * 8, srcWidth() * 8, *dst(), *src());
    }
 
    std::unique_ptr<Instruction> clone() const override {
        return std::make_unique<SExt>(
            dstWidth(), srcWidth(), share(*dst()), share(*src()));
    }
 
    void accept(InstructionVisitor &visitor) override {
        visitor.visitSExt(*this);
    }
 
    void accept(InstructionVisitor &visitor) const override {
        visitor.visitSExt(*this);
    }
 
private:
    int dstWidth_, srcWidth_;
    RegisterOperand dst_, src_;
};
 
} // namespace mini_llvm::mir