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// Simulator for the RISC-V[ECTOR] mini-ISA
// Copyright (C) 2025 Siddarth Suresh
// Copyright (C) 2025 bdunahu
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#ifndef WB_H
#define WB_H
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
class WB : public Stage
{
public:
using Stage::advance;
using Stage::Stage;
private:
void advance_helper() override;
/**
* Performs the actual work of storing into a register.
*/
void write_handler();
/**
* Performs the actual work of processing a jump instruction.
*/
void jump_handler();
/**
* @return true if the current instruction is an R or I type and is not a
* STORE.
*/
bool should_write();
/**
* @return true if the current instruction is a J type and is not a push.
* STORE.
*/
bool should_jump();
/**
* @return the vector register to be stored, obtained by copying the
* unfilled elements in the destination register to the source. This is
* required to ensure what is written back only changes VECTOR_LENGTH number
* of elements. Correctly handles zeroing out ALU operations if the VECTOR
* LENGTH number is zero.
*/
std::array<signed int, V_R_LIMIT> copy_extra_vector_elements();
};
#endif /* WB_H_INCLUDED */
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