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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/>.
#include "mm.h"
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
void MM::advance_helper()
{
signed int data;
int i;
this->try_start();
if (this->status == OK) {
return;
}
switch (this->curr_instr->mnemonic) {
case LOAD:
i = this->storage->read_word(
this, this->curr_instr->operands.integer.slot_one, data);
if (i) {
this->curr_instr->operands.integer.slot_one = data;
}
this->try_finish(i);
break;
case SRDL:
i = this->storage->read_word(
this,
this->curr_instr->operands.s_vector.slot_one[this->curr_element],
data);
if (i) {
this->curr_instr->operands.s_vector.slot_one[this->curr_element] =
data;
}
this->try_finish(i);
break;
case PUSH:
case STORE:
i = this->storage->write_word(
this, this->curr_instr->operands.integer.slot_two,
this->curr_instr->operands.integer.slot_one);
this->try_finish(i);
break;
case SRDS:
i = this->storage->write_word(
this,
this->curr_instr->operands.s_vector.slot_three[this->curr_element],
this->curr_instr->operands.s_vector.slot_one[this->curr_element]);
this->try_finish(i);
break;
case POP:
i = this->storage->read_word(
this, this->curr_instr->operands.integer.slot_three, data);
this->status = i ? OK : STALLED;
if (i) {
this->curr_instr->operands.integer.slot_three = data;
}
break;
default:
this->status = OK;
}
}
void MM::try_start()
{
if (this->curr_instr->type != SI_INT) {
this->status =
(this->curr_element >= this->curr_instr->slot_B) ? OK : STALLED;
}
if (this->status == OK)
this->curr_element = 0;
}
void MM::try_finish(int response)
{
if (this->curr_instr->type == SI_INT) {
this->status = response ? OK : STALLED;
} else {
if (response) {
++this->curr_element;
}
}
}
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