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#include "wb.h"
#include "accessor.h"
#include "instrDTO.h"
#include "response.h"
#include "stage.h"
WB::WB(Stage *stage) : Stage(stage) { this->id = WRITE; }
void WB::advance_helper()
{
if (this->curr_instr->get_type() == R ||
this->curr_instr->get_type() == I) {
if (this->checked_out.size() > 0) {
signed int reg = this->checked_out.front();
this->checked_out.pop_front();
if (reg >= GPR_NUM) {
// TODO: handle vector instructions
} else {
if (this->curr_instr->get_mnemonic() != STORE &&
this->curr_instr->get_mnemonic() != STOREV) {
this->gprs[reg] = this->curr_instr->get_s1();
}
}
}
} else if (this->curr_instr->get_type() == J) {
// TODO:handle push pop
// branch taken
if (this->pc != this->curr_instr->get_s1()) {
if (this->curr_instr->get_mnemonic() == JAL) {
// set link register to next instruction
this->gprs[1] = this->pc + 1;
}
this->pc = this->curr_instr->get_s1();
// clear pending registers and squash pipeline
this->checked_out = {};
this->next->squash();
}
}
this->status = OK;
}
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