std::string toDecString(uint8_t number)
{
return toDecString(static_cast<int>(number));
}
InstDataStr InstDecoder::decodeInstStr(const unsigned& src, const bool& useHex) {
unsigned opCode;
unsigned rs, rt, rd;
unsigned c;
unsigned funct;
std::string opCodeStr;
std::string rsStr, rtStr, rdStr;
std::string cStr;
std::string functStr;
opCode = getBitsInRange(src, 26, 32);
opCodeStr = InstLookUp::opCodeLookUp(opCode);
if (opCodeStr == "undef") {
return InstDataStr();
}
else if (opCode == 0x0u) {
funct = getBitsInRange(src, 0, 6);
rs = getBitsInRange(src, 21, 26);
rt = getBitsInRange(src, 16, 21);
rd = getBitsInRange(src, 11, 16);
c = getBitsInRange(src, 6, 11);
rsStr = InstLookUp::registerLookUpNumber(rs);
rtStr = InstLookUp::registerLookUpNumber(rt);
rdStr = InstLookUp::registerLookUpNumber(rd);
if (useHex) {
cStr = toHexString(c);
}
else {
cStr = toDecString(c);
}
functStr = InstLookUp::functLookUp(funct);
InstDataStr ret;
ret.setType(InstType::R);
ret.setOpCode(opCodeStr);
ret.setRs(rsStr);
ret.setRt(rtStr);
ret.setRd(rdStr);
ret.setC(cStr);
ret.setFunct(functStr);
return ret;
}
else if (opCode == 0x02u || opCode == 0x03u) {
c = getBitsInRange(src, 0, 26);
if (useHex) {
cStr = toHexString(c);
}
else {
cStr = toDecString(c);
}
InstDataStr ret;
ret.setType(InstType::J);
ret.setOpCode(opCodeStr);
ret.setC(cStr);
return ret;
}
else if (opCode == 0x3Fu) {
opCodeStr = InstLookUp::opCodeLookUp(opCode);
InstDataStr ret;
ret.setType(InstType::S);
ret.setOpCode(opCodeStr);
return ret;
}
else {
rs = getBitsInRange(src, 21, 26);
rt = getBitsInRange(src, 16, 21);
c = getBitsInRange(src, 0, 16);
rsStr = InstLookUp::registerLookUpNumber(rs);
rtStr = InstLookUp::registerLookUpNumber(rt);
int sc;
switch (opCode) {
case 0x08u:
case 0x23u:
case 0x21u:
case 0x25u:
case 0x20u:
case 0x24u:
case 0x2Bu:
case 0x29u:
case 0x28u:
case 0x04u:
case 0x05u:
case 0x07u:
sc = toSigned(c, 16);
break;
default:
sc = static_cast<int>(c);
}
if (useHex) {
cStr = toHexString(sc);
}
else {
cStr = toDecString(sc);
}
InstDataStr ret;
ret.setType(InstType::I);
ret.setOpCode(opCodeStr);
ret.setRs(rsStr);
ret.setRt(rtStr);
ret.setC(cStr);
return ret;
}
}
std::string toDecString(bool number) { return (number ? toDecString("1") : toDecString("0")); }
