///* disassembly */
static int disop(DISTATE sp, DIS dp)
{
int tmp;
int w;
int err;
StringBuilder opndbuf = new StringBuilder();
StringBuilder commbuf = new StringBuilder();
var opnd = opndbuf;
int inst = dp.data[0];
dp.flags = sp.flags;
sp.flags = 0;
switch (dp.opcode.type)
{
case itype.TYPE_A:
dp.i = (Reg)(0xF & inst);
dp.j = (Reg)(0xF & (inst >> 4));
break;
case itype.TYPE_B:
dp.i = (Reg)(0xF & inst);
dp.x = (ulong)(0xFF & (inst >> 4));
dp.w = 8;
break;
case itype.TYPE_C:
dp.i = (Reg)(0xF & inst);
dp.x = (ulong)(0xF & (inst >> 4));
dp.w = 4;
break;
case itype.TYPE_D:
dp.x = (ulong)(0xFF & inst);
dp.w = 8;
break;
case itype.TYPE_E:
dp.i = (Reg)(0xF & inst);
break;
case itype.TYPE_F:
dp.x = (ulong)(0x7FF & inst);
dp.w = 11;
break;
case itype.TYPE_Z:
dp.j = (Reg)(0xF & (inst >> 4));
break;
case itype.TYPE_W:
dp.x = (ulong)(inst);
dp.w = 16;
break;
}
foreach (char s in dp.opcode.format)
{
switch (s)
{
case '#':
opnd.Append(fmt.imm);
break;
case '&':
opnd.Append(fmt.and);
break;
case '(':
opnd.Append(fmt.par);
break;
case ')':
opnd.Append(fmt.ens);
break;
case '+':
opnd.Append(fmt.inc);
break;
case ',':
opnd.Append(fmt.nxt);
break;
case '-':
opnd.Append(fmt.dec);
break;
case ';':
opnd = commbuf;
break;
case '@':
opnd.Append(fmt.mem);
break;
case '2':
dp.x <<= 1;
dp.w += 1;
break;
case '4':
dp.x <<= 2;
dp.w += 2;
break;
case 'A':
opnd.Append(Reg.AC);
break;
case 'C':
opnd.Append(Reg.CCR);
break;
case 'F':
opnd.Append(Reg.FP);
break;
case 'J':
if (sp.IsValid(dp.j))
{
dp.x = sp.reg[(int)dp.j];
dp.w = 32;
}
else
{
dp.x = 0;
dp.w = 0;
}
break;
case 'I':
if (sp.IsValid(dp.i))
{
dp.x = sp.reg[(int)dp.i];
dp.w = 32;
}
else
{
dp.x = 0;
dp.w = 0;
}
break;
case 'M':
opnd.Append(Reg.ILM);
break;
case 'P':
opnd.Append(Reg.PS);
break;
case 'S':
opnd.Append(Reg.SP);
break;
case 'X':
/* constant extension word */
if ((err = getword(dp)) != 0)
return err;
dp.x = ((ulong)(dp.x << 16)) + ((ulong)dp.data[dp.n - 1]);
dp.w += 16;
break;
case 'Y':
/* coprocessor extension word */
if ((err = getword(dp)) != 0)
return err;
tmp = dp.data[dp.n - 1];
dp.x = (ulong)dp.i;
dp.w = 4;
dp.c = 0xFF & (tmp >> 8);
dp.j = (Reg)(0x0F & (tmp >> 4));
dp.i = (Reg)(0x0F & (tmp));
break;
case 'a':
w = dp.w;
while (w >= 8)
{
w -= 8;
opnd.Append(Asc((int)(dp.x >> w)));
}
break;
case 'b':
/* shift2 */
dp.x += 16;
dp.w += 1;
break;
case 'c':
/* coprocessor operation */
opnd.AppendFormat(fmt.u[8], dp.c);
break;
case 'd':
/* unsigned decimal */
opnd.AppendFormat(fmt.ud, dp.x);
break;
case 'f':
w = dp.w >> 1;
tmp = (int)(((1ul << w) - 1) & (dp.x >> w));
int tmq = (int)(((1ul << w) - 1) & dp.x);
if (tmq != 0)
opnd.AppendFormat("{0:g}", ((double)tmp) / ((double)tmq));
else
opnd.Append("NaN");
break;
case 'g':
dp.i += SPECIALS;
goto case 'i';
case 'h':
dp.j += SPECIALS;
goto case 'j';
case 'i':
opnd.Append((Reg)dp.i);
break;
case 'j':
opnd.Append((Reg)dp.j);
break;
case 'k':
dp.i += COPROCESSOR;
goto case 'i';
case 'l':
dp.j += COPROCESSOR;
goto case 'j';
case 'n':
/* negative constant */
opnd.AppendFormat(fmt.u[dp.w + 1], dp.x);
//TODO opnd.AppendFormat(fmt.n[dp.w + 1], ((1ul << (dp.w + 1)) - 1) & NEG(dp.w, (1ul << dp.w) | dp.x));
break;
case 'p':
/* pair */
w = dp.w >> 1;
opnd.AppendFormat(fmt.u[w], ((1ul << w) - 1) & (dp.x >> w));
opnd.Append(fmt.nxt);
opnd.AppendFormat(fmt.u[w], ((1ul << w) - 1) & dp.x);
break;
case 'q':
/* rational */
w = dp.w >> 1;
opnd.AppendFormat(fmt.ud, ((1ul << w) - 1) & (dp.x >> w));
opnd.Append("/");
opnd.AppendFormat(fmt.ud, ((1ul << w) - 1) & dp.x);
break;
case 'r':
/* relative */
dp.x = (ulong)((long)dp.pc + 2 + SignExtend(dp.w, (int)dp.x));
dp.w = 32;
break;
case 's':
/* signed constant */
if (IsNeg(dp.w, dp.x))
{
if ((opt_outflag & OutOpt.OF_CSTYLE) != 0 && (opnd[-1] == '+'))
opnd.Remove(opnd.Length - 1, 1);
opnd.AppendFormat(fmt.n[dp.w], NEG(dp.w, (long)dp.x));
}
else
{
opnd.AppendFormat(fmt.u[dp.w - 1], dp.x);
}
break;
case 'u':
/* unsigned constant */
opnd.AppendFormat(fmt.u[dp.w], dp.x);
break;
case 'v':
/* vector */
opnd.AppendFormat(fmt.u[8], 0xFF - (0xFF & ((dp.pc - dp.memrange.start) / 4)));
break;
case 'x':
dp.x |= 0x100;
break;
case 'y':
dp.c += 8;
goto case 'z'; /*FALLTHROUGH*/
case 'z':
/* register list */
opnd.Append(fmt.par);
bool first = true;
for (int i = 0; i < 8; ++i)
{
if ((dp.x & (uint)(1 << i)) != 0)
{
if (first)
first = false;
else
opnd.Append(",");
if ((dp.x & 0x100) != 0)
opnd.Append((Reg)(dp.c + 7 - i));
else
opnd.Append((Reg)(dp.c + i));
}
}
opnd.Append(fmt.ens);
break;
default:
opnd.Append(s);
break;
}
}
Reg r = Reg.NOREG;
DF dflags = 0;
foreach (var s in dp.opcode.action)
{
switch (s)
{
case '!':
/* jump */
dflags |= DF.FLOW | DF.BREAK | DF.BRANCH;
break;
case '?':
/* branch */
dflags |= DF.FLOW | DF.BRANCH;
break;
case '(':
/* call */
dflags |= DF.FLOW | DF.CALL;
//Debug.WriteLine("CALL {0:X8} {1:x8}", dp.x, dp.pc);
break;
case ')':
/* return */
dflags |= DF.FLOW | DF.BREAK | DF.CALL;
break;
case '_':
/* delay */
dflags |= DF.DELAY;
break;
case 'A':
r = Reg.AC;
break;
case 'C':
r = Reg.CCR;
break;
case 'F':
r = Reg.FP;
break;
case 'P':
r = Reg.PS;
break;
case 'S':
r = Reg.SP;
break;
case 'i':
r = dp.i;
break;
case 'j':
r = dp.j;
break;
case 'w':
sp.SetInvalid(r);
break;
case 'v':
if (sp.OkReg(r))
{
sp.SetValid(r);
sp.reg[(int)r] = dp.x;
}
break;
case 'x':
r = Reg.NOREG;
break;
default:
Error("bad action '{0}'", s);
break;
}
}
dp.flags |= dflags & DF.TO_KEEP;
sp.flags |= dflags & DF.TO_COPY;
if ((dflags & DF.DELAY) != 0)
sp.flags |= dflags & DF.TO_DELAY;
else
dp.flags |= dflags & DF.TO_DELAY;
/*XXX*/
dp.opnds = opndbuf.ToString();
if (commbuf.Length >0 && dp.memrange.data.mem == MemType.MEMTYPE_UNKNOWN)
{
//opnd = commbuf;
for (int i = 0; i < dp.n; ++i)
{
commbuf.Append(Asc(dp.data[i] >> 8));
commbuf.Append(Asc(dp.data[i]));
}
}
dp.comment = commbuf.ToString();
dp.writedis(outfp);
return dp.n << 1;
}