Ejemplo n.º 1
0
 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;
 }
Ejemplo n.º 2
0
 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;
 }
Ejemplo n.º 3
0
 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;
 }
Ejemplo n.º 4
0
 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;
 }
Ejemplo n.º 5
0
 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;
 }
Ejemplo n.º 6
0
 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;
 }
Ejemplo n.º 7
0
 public Branch execute(Processor cpu) {
   if (cpu.cf()) {
     int target = (cpu.eip + jmp + blockLength) & 0xffff;
     cpu.cs.checkAddress(target);
     cpu.eip = target;
     return Branch.T1;
   } else {
     cpu.eip += blockLength;
     return Branch.T2;
   }
 }
Ejemplo n.º 8
0
 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;
 }
Ejemplo n.º 9
0
 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;
 }
Ejemplo n.º 10
0
 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;
 }
Ejemplo n.º 11
0
 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;
 }
Ejemplo n.º 12
0
 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;
 }
Ejemplo n.º 13
0
 public Branch execute(Processor cpu) {
   cpu.of = cpu.af = cpu.cf = false;
   cpu.flagResult = (op1.get32(cpu) & immd);
   cpu.flagStatus = SZP;
   return Branch.None;
 }