Beispiel #1
0
 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;
 }
Beispiel #2
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 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;
 }
Beispiel #3
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 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;
 }
Beispiel #4
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 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;
 }
Beispiel #5
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 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;
 }
Beispiel #6
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 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;
 }
Beispiel #7
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 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;
 }
Beispiel #8
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 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;
 }
Beispiel #9
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 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;
 }
Beispiel #10
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 public Branch execute(Processor cpu) {
   double freg0 = cpu.fpu.ST(0);
   double freg1 = op1.getF64(cpu);
   if ((Double.isInfinite(freg0) && (freg1 == 0.0))
       || (Double.isInfinite(freg1) && (freg0 == 0.0))) cpu.fpu.setInvalidOperation();
   cpu.fpu.setST(0, freg0 * freg1);
   return Branch.None;
 }
Beispiel #11
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 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;
 }
Beispiel #12
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 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;
 }
Beispiel #13
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  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;
  }
Beispiel #14
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 public Branch execute(Processor cpu) {
   System.out.println("Warning: Using incomplete opcode: FRSTOR_94");
   int addr = op1.get(cpu);
   cpu.fpu.setControl(cpu.linearMemory.getWord(addr));
   cpu.fpu.setStatus(cpu.linearMemory.getWord(addr + 2));
   cpu.fpu.setTagWord(cpu.linearMemory.getWord(addr + 4));
   // cpu.linearMemory.setWord(addr + 6, (short) 0 /* cpu.fpu.getIP()  offset*/);
   // cpu.linearMemory.setWord(addr + 8, (short) 0 /* (selector & 0xFFFF)*/);
   // cpu.linearMemory.setWord(addr + 10, (short) 0 /* operand pntr offset*/);
   // cpu.linearMemory.setWord(addr + 12, (short) 0 /* operand pntr selector & 0xFFFF*/);
   // for (int i = 0; i < 8; i++) {
   //    byte[] extended = FpuState64.doubleToExtended(fpu.ST(i), false /* this is WRONG!!!!!!!
   // */);
   //    for (int j = 0; j < 10; j++)
   //       seg0.setByte(addr0 + 14 + j + (10 * i), extended[j]);
   // }
   return Branch.None;
 }
Beispiel #15
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 public Branch execute(Processor cpu) {
   op1.set8(cpu, (byte) ~op1.get8(cpu));
   return Branch.None;
 }
Beispiel #16
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 public Branch execute(Processor cpu) {
   op1.setF80(cpu, cpu.fpu.ST(0));
   cpu.fpu.pop();
   return Branch.None;
 }
Beispiel #17
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 public Branch execute(Processor cpu) {
   cpu.of = cpu.af = cpu.cf = false;
   cpu.flagResult = (op1.get32(cpu) & immd);
   cpu.flagStatus = SZP;
   return Branch.None;
 }
Beispiel #18
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 public Branch execute(Processor cpu) {
   cpu.push32(op1.get32(cpu));
   return Branch.None;
 }
Beispiel #19
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 public Branch execute(Processor cpu) {
   int addr = op1.get(cpu) + op1.getBase(cpu);
   cpu.linearMemory.setWord(addr, (short) cpu.idtr.getLimit());
   cpu.linearMemory.setDoubleWord(addr + 2, cpu.idtr.getBase() & 0x00ffffff);
   return Branch.None;
 }
Beispiel #20
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 public Branch execute(Processor cpu) {
   op1.set16(cpu, (short) cpu.r_eax.get16());
   return Branch.None;
 }
Beispiel #21
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 public Branch execute(Processor cpu) {
   Reg op1 = cpu.regs[op1Index];
   op1.set16((short) op2.get16(cpu));
   return Branch.None;
 }
Beispiel #22
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 public Branch execute(Processor cpu) {
   Reg op1 = cpu.regs[op1Index];
   int tmp = op2.get32(cpu);
   if (!cpu.sf()) op1.set32(tmp);
   return Branch.None;
 }