BigInt & BigInt::operator-=(BICR bi)
{
int borrow=0;
std::vector<int>::iterator it;
it=transform(bi.digits.begin(),bi.digits.end(),
digits.begin(),digits.begin(),SubWithBorrow(borrow));
transform(it,digits.end(),it,Borrow(borrow));
return *this;
}
void rsc_inst(ARMProc *proc, UWord instruction) {
#ifdef DEBUG
printf("Ejecutaste un rsc\n");
#endif
//Instrucciones de DP
ARMAddr *modes = addr_modes_dp();
ARMAddr *mode;
ARMAddrDPReturn result;
Word S;
Word Rn;
Word Rd;
Word borrow;
Word last_rd;
Word Cflag = get_bits(*proc->cpsr,29,1);
mode = fetch_addr(modes, instruction);
if(mode != NULL)
mode->execute(proc, instruction, &result);
if(!cond(proc,instruction))
return;
Rn = get_bits(instruction,16,4);
Rd = get_bits(instruction,12,4);
last_rd = *proc->r[Rd];
*proc->r[Rd] = SubWithBorrow(result.shifter_operand,*proc->r[Rn]+!Cflag,&borrow);
if(S && Rd==15){
if(proc->cpsr != NULL){
*proc->cpsr = *proc->spsr;
}
}
else if(S == 1){
set_status(proc,status_n,get_bits(*proc->r[Rd],31,1));
set_status(proc,status_z,*proc->r[Rd] == 0);
set_status(proc,status_c,borrow == 0);
set_status(proc,status_v,OverflowFrom(last_rd,*proc->r[Rd]));
}
}
