shr method
Implementation
void shr(int opcode) {
registers.v[0xF] = (registers.v[_rxIndex(opcode)] % 2) == 1 ? 1 : 0;
registers.v[_rxIndex(opcode)] >>= 1;
}
void shr(int opcode) {
registers.v[0xF] = (registers.v[_rxIndex(opcode)] % 2) == 1 ? 1 : 0;
registers.v[_rxIndex(opcode)] >>= 1;
}