public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
Reg op2 = cpu.regs[op2Index];
int bit = 1 << (op2.get32() & (32 - 1));
cpu.cf = (0 != (op1.get32() & bit));
cpu.flagStatus &= NCF;
op1.set32((op1.get32() & ~bit));
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
cpu.flagOp1 = op1.get32();
cpu.flagOp2 = op2.get32(cpu);
cpu.flagResult = (cpu.flagOp1 - cpu.flagOp2);
op1.set32(cpu.flagResult);
cpu.flagIns = UCodes.SUB32;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
Reg op2 = cpu.regs[op2Index];
int add = (cpu.cf() ? 1 : 0);
cpu.flagOp1 = op1.get32();
cpu.flagOp2 = op2.get32();
cpu.flagResult = (cpu.flagOp1 - (cpu.flagOp2 + add));
op1.set32(cpu.flagResult);
cpu.flagIns = UCodes.SBB32;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
int tmp = op2.get32(cpu);
if (!cpu.sf()) op1.set32(tmp);
return Branch.None;
}