public Branch execute(Processor cpu) {
cpu.eip += blockLength;
int tmpEip = cpu.eip + jmp;
cpu.cs.checkAddress(tmpEip);
cpu.eip = tmpEip;
return Branch.T1;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
cpu.of = cpu.af = cpu.cf = false;
cpu.flagResult = (op1.get32() & immd);
cpu.flagStatus = SZP;
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
Reg op2 = cpu.regs[op2Index];
cpu.zf(cpu.zf());
cpu.cf(((op1.get16() & (1 << (op2.get16() & (16 - 1)))) != 0));
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.flagOp1 = cpu.r_eax.get32();
cpu.flagOp2 = immd;
cpu.flagResult = (cpu.flagOp1 - cpu.flagOp2);
cpu.flagIns = UCodes.SUB32;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.flagOp1 = (byte) op1.get8(cpu);
cpu.flagOp2 = (byte) immb;
cpu.flagResult = (byte) (cpu.flagOp1 - cpu.flagOp2);
cpu.flagIns = UCodes.SUB8;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.flagOp1 = cpu.r_eax.get16();
cpu.flagOp2 = immw;
cpu.flagResult = (short) (cpu.flagOp1 - cpu.flagOp2);
cpu.flagIns = UCodes.SUB16;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.flagOp1 = op1.get32(cpu);
cpu.flagResult = (-cpu.flagOp1);
op1.set32(cpu, cpu.flagResult);
cpu.flagIns = UCodes.NEG32;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
cpu.of = cpu.af = cpu.cf = false;
cpu.flagResult = (byte) (op1.get8() ^ op2.get8(cpu));
op1.set8((byte) cpu.flagResult);
cpu.flagStatus = SZP;
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) {
Reg op1 = cpu.regs[op1Index];
Reg op2 = cpu.regs[op2Index];
int bit = 1 << (op2.get16() & (16 - 1));
cpu.cf = (0 != (op1.get16() & bit));
cpu.flagStatus &= NCF;
op1.set16((short) (op1.get16() & ~bit));
return Branch.None;
}
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) {
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) {
if (!cpu.of()) {
int tmpEip = cpu.eip + jmp + blockLength;
cpu.cs.checkAddress(tmpEip);
cpu.eip = tmpEip;
return Branch.T1;
} else {
cpu.eip += blockLength;
return Branch.T2;
}
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
Reg op2 = cpu.regs[op2Index];
cpu.flagOp1 = (byte) op1.get8();
cpu.flagOp2 = (byte) op2.get8();
cpu.flagResult = (byte) (cpu.flagOp1 + cpu.flagOp2);
op1.set8((byte) cpu.flagResult);
cpu.flagIns = UCodes.ADD8;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
if (cpu.r_cx.get16() == 0) {
int target = (cpu.eip + jmp + blockLength) & 0xffff;
cpu.cs.checkAddress(target);
cpu.eip = target;
return Branch.T1;
} else {
cpu.eip += blockLength;
return Branch.T2;
}
}
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) {
Reg op1 = cpu.regs[op1Index];
int iop1 = (short) op1.get16();
int iop2 = (short) cpu.r_eax.get16();
int res32 = (((int) (short) iop1) * ((short) iop2));
cpu.r_eax.set16((short) res32);
cpu.r_edx.set16((short) (res32 >> 16));
cpu.setOSZAPC_Logic16(res32);
if (res32 != (short) res32) {
cpu.of(true);
cpu.cf(true);
}
return Branch.None;
}
public Branch execute(Processor cpu) {
int shift = immb & (32 - 1);
int reg0 = op1.get32(cpu);
int res = (reg0 >>> shift) | (reg0 << (32 - shift));
op1.set32(cpu, res);
boolean bit30 = (res & (1 << (32 - 2))) != 0;
boolean bit31 = (res & (1 << (32 - 1))) != 0;
if (shift > 0) {
cpu.cf = bit31;
cpu.of = bit30 ^ bit31;
cpu.flagStatus &= NOFCF;
}
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) {
int shift = cpu.r_cl.get8() & 0x1f;
if (shift != 0) {
if (shift <= 16) {
cpu.flagStatus = OSZPC;
} else {
cpu.flagStatus = SZP;
cpu.of = false;
cpu.cf = false;
}
cpu.af = false;
cpu.flagOp1 = op1.get32(cpu);
cpu.flagOp2 = shift;
cpu.flagResult = (cpu.flagOp1 << cpu.flagOp2);
op1.set32(cpu, cpu.flagResult);
cpu.flagIns = UCodes.SHL32;
}
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op2 = cpu.regs[op2Index];
int add = (cpu.cf() ? 1 : 0);
cpu.flagOp1 = op1.get8(cpu);
cpu.flagOp2 = op2.get8();
cpu.flagResult = (byte) (cpu.flagOp1 - (cpu.flagOp2 + add));
op1.set8(cpu, (byte) cpu.flagResult);
cpu.flagIns = UCodes.SBB8;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
Reg op2 = cpu.regs[op2Index];
boolean incf = cpu.cf();
cpu.flagOp1 = op1.get8();
cpu.flagOp2 = op2.get8();
cpu.flagResult = (byte) (cpu.flagOp1 + cpu.flagOp2 + (incf ? 1 : 0));
op1.set8((byte) cpu.flagResult);
cpu.flagIns = UCodes.ADC8;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
boolean incf =
Processor.getCarryFlag(
cpu.flagStatus, cpu.cf, cpu.flagOp1, cpu.flagOp2, cpu.flagResult, cpu.flagIns);
cpu.flagOp1 = op1.get16();
cpu.flagOp2 = immb;
cpu.flagResult = (short) (cpu.flagOp1 + cpu.flagOp2 + (incf ? 1 : 0));
op1.set16((short) cpu.flagResult);
cpu.flagIns = UCodes.ADC16;
cpu.flagStatus = OSZAPC;
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.push32(op1.get32(cpu));
return Branch.None;
}
public void ioPortWriteByte(int address, int data) {
setGateA20State((data & 0x02) != 0);
if ((data & 0x01) != 0) cpu.reset();
}
public Branch execute(Processor cpu) {
Reg op1 = cpu.regs[op1Index];
int tmp = op2.get32(cpu);
if (!cpu.sf()) op1.set32(tmp);
return Branch.None;
}
public boolean updated() {
return ioportRegistered
&& cpu.updated()
&& physicalAddressSpace.updated()
&& linearAddressSpace.updated();
}
public Branch execute(Processor cpu) {
Segment seg = cpu.segs[segIndex];
if (cpu.checkIOPermissions8(cpu.r_dx.get16() & 0xffff)) StaticOpcodes.rep_outsb_a32(cpu, seg);
else throw ProcessorException.GENERAL_PROTECTION_0;
return Branch.None;
}
public Branch execute(Processor cpu) {
cpu.of = cpu.af = cpu.cf = false;
cpu.flagResult = (op1.get32(cpu) & immd);
cpu.flagStatus = SZP;
return Branch.None;
}