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#include "id.h"
#include "accessor.h"
#include "instrDTO.h"
#include "logger.h"
#include "response.h"
#include "stage.h"
#include "utils.h"
static Logger *global_log = Logger::getInstance();
ID::ID(Stage *stage) : Stage(stage) { this->id = DCDE; }
Response ID::advance(InstrDTO &i) { Response r; }
void ID::get_instr_fields(
signed int &s1,
signed int &s2,
signed int &s3,
unsigned int &type,
unsigned int &opcode)
{
// unsigned int &opcode;
int opcode_bits;
type = GET_LS_BITS(s1, TYPE_SIZE);
opcode_bits = (type == 0b0) ? R_OPCODE_SIZE : OPCODE_SIZE;
switch (type) {
case 0:
// R-TYPE
opcode += GET_MID_BITS(s1, TYPE_SIZE, TYPE_SIZE + opcode_bits);
s3 = GET_MID_BITS(
s1, TYPE_SIZE + opcode_bits + (REG_SIZE * 2),
TYPE_SIZE + opcode_bits + (REG_SIZE * 3));
s2 = GET_MID_BITS(
s1, TYPE_SIZE + opcode_bits + REG_SIZE,
TYPE_SIZE + opcode_bits + (REG_SIZE * 2));
s1 = GET_MID_BITS(
s1, TYPE_SIZE + opcode_bits,
TYPE_SIZE + opcode_bits + REG_SIZE);
break;
case 1:
// I-TYPE
opcode = GET_MID_BITS(s1, TYPE_SIZE, TYPE_SIZE + opcode_bits);
s3 = GET_MID_BITS(
s1, TYPE_SIZE + opcode_bits + (REG_SIZE * 2), WORD_SPEC);
s2 = GET_MID_BITS(
s1, TYPE_SIZE + opcode_bits + REG_SIZE,
TYPE_SIZE + opcode_bits + (REG_SIZE * 2));
s1 = GET_MID_BITS(
s1, TYPE_SIZE + opcode_bits, TYPE_SIZE + opcode_bits + REG_SIZE);
break;
case 2:
// J-TYPE
opcode = GET_MID_BITS(s1, TYPE_SIZE, TYPE_SIZE + opcode_bits);
s2 = GET_MID_BITS(s1, TYPE_SIZE + OPCODE_SIZE + REG_SIZE, WORD_SPEC);
s1 = GET_MID_BITS(
s1, TYPE_SIZE + OPCODE_SIZE, TYPE_SIZE + OPCODE_SIZE + REG_SIZE);
break;
default:
global_log->log(
DEBUG,
string_format("%s returning invalid type: %d", __FUNCTION__, type));
}
}
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