public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
if (op2.get16(cpu) == 0) {
cpu.zf(true);
} else {
cpu.zf(false);
op1.set16(31 - StaticOpcodes.numberOfLeadingZeros(0xFFFF & op2.get16(cpu)));
}
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.flagOp1 = (short) op1.get16(cpu);
cpu.flagOp2 = (short) immw;
cpu.flagResult = (short) (cpu.flagOp1 - cpu.flagOp2);
op1.set16(cpu, (short) cpu.flagResult);
cpu.flagIns = UCodes.SUB16;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
int shift = 1 & 0x1f;
shift %= 16 + 1;
long val = 0xFFFF & op1.get16(cpu);
val |= cpu.cf() ? 1L << 16 : 0;
val = (val << shift) | (val >>> (16 + 1 - shift));
op1.set16(cpu, (short) (int) val);
boolean bit31 = (val & (1L << (16 - 1))) != 0;
boolean bit32 = (val & (1L << (16))) != 0;
cpu.cf(bit32);
if (shift == 1) cpu.of(bit31 ^ bit32);
return Branch.None;
}
public Branch execute(Processor cpu) {
int shift = cpu.r_cl.get8() & (16 - 1);
int reg0 = 0xFFFF & op1.get16(cpu);
int res = (reg0 << shift) | (reg0 >>> (16 - shift));
op1.set16(cpu, (short) res);
boolean bit0 = (res & 1) != 0;
boolean bit31 = (res & (1 << (16 - 1))) != 0;
if ((0x1F & cpu.r_cl.get8()) > 0) {
cpu.cf = bit0;
cpu.of = bit0 ^ bit31;
cpu.flagStatus &= NOFCF;
}
return Branch.None;
}
public Branch execute(Processor cpu) {
int selector = op1.get16(cpu) & 0xffff;
if (selector == 0) {
cpu.ldtr = SegmentFactory.NULL_SEGMENT;
} else {
Segment newSegment = cpu.getSegment(selector & ~0x4);
if (newSegment.getType() != 0x02)
throw new ProcessorException(ProcessorException.Type.GENERAL_PROTECTION, selector, true);
if (!(newSegment.isPresent()))
throw new ProcessorException(ProcessorException.Type.GENERAL_PROTECTION, selector, true);
cpu.ldtr = newSegment;
}
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
op1.set16((short) op2.get16(cpu));
return Branch.None;
}