// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
// EAGEN0.C - Effective Address Code Generation
// Generated Code for eaN (Included twice by "eagen.c")
-// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2017 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
// Source utilised with the kind permission of Landon Dyer
//
int eaNgen(WORD siz)
{
- WORD w;
- VALUE v;
- WORD tdb;
-
- v = aNexval;
- w = (WORD)(aNexattr & DEFINED);
- tdb = (WORD)(aNexattr & TDB);
+ VALUE v = aNexval;
+ WORD w = (WORD)(aNexattr & DEFINED);
+ WORD tdb = (WORD)(aNexattr & TDB);
switch (amN)
{
// expr(An)
if (w)
{
- // Just deposit it
+ // Just deposit it
if (tdb)
- rmark(cursect, sloc, tdb, MWORD, NULL);
+ MarkRelocatable(cursect, sloc, tdb, MWORD, NULL);
- if ((v == 0) && optim_flags[OPT_INDIRECT_DISP])
+ if ((v == 0) && optim_flags[OPT_INDIRECT_DISP] && !movep)
{
- // If expr is 0, size optimise the opcode.
- // Generally the lower 6 bits of the opcode
- // for expr(ax) are 101rrr where rrr=the
- // number of the register, then followed by
- // a word containing 'expr'. We need to change
- // that to 010rrr.
+ // If expr is 0, size optimise the opcode. Generally the lower
+ // 6 bits of the opcode for expr(ax) are 101rrr where rrr=the
+ // number of the register, then followed by a word containing
+ // 'expr'. We need to change that to 010rrr.
if ((siz & 0x8000) == 0)
{
chptr_opcode[0] &= ((0xFFC7 >> 8) & 255); // mask off bits
}
else
{
- // Special case for move ea,ea:
- // there are two ea fields there and
- // we get a signal if it's the second ea field
+ // Special case for move ea,ea: there are two ea fields
+ // there and we get a signal if it's the second ea field
// from m_ea - siz's 16th bit is set
chptr_opcode[0] &= ((0xFE3F >> 8) & 255); // mask off bits
chptr_opcode[1] &= 0xFE3F & 255; // mask off bits
return OK;
}
- if (v + 0x8000 >= 0x18000)
+ if ((v + 0x8000) >= 0x18000)
return error(range_error);
D_word(v);
}
else
{
- // Arrange for fixup later on
- AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr);
+ // Arrange for fixup later on
+ AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr);
D_word(0);
}
case PCDISP:
if (w)
{
- // Just deposit it
+ // Just deposit it
if ((aNexattr & TDB) == cursect)
v -= (VALUE)sloc;
else if ((aNexattr & TDB) != ABS)
}
else
{
- // Arrange for fixup later on
- AddFixup(FU_WORD|FU_SEXT|FU_PCREL, sloc, aNexpr);
+ // Arrange for fixup later on
+ AddFixup(FU_WORD | FU_SEXT | FU_PCREL, sloc, aNexpr);
D_word(0);
}
if (aNexattr & DEFINED)
{
- // Deposit a byte...
+ // Deposit a byte...
if (tdb)
- // Can't mark bytes
+ // Can't mark bytes
return error(abs_error);
if (v + 0x80 >= 0x180)
return error(range_error);
- w |= v & 0xff;
+ w |= v & 0xFF;
D_word(w);
}
else
{
// Fixup the byte later
- AddFixup(FU_BYTE|FU_SEXT, sloc+1, aNexpr);
+ AddFixup(FU_BYTE | FU_SEXT, sloc + 1, aNexpr);
D_word(w);
}
if (aNexattr & DEFINED)
{
- // Deposit a byte...
- if ((aNexattr & TDB) == cursect)
+ // Deposit a byte...
+ if ((aNexattr & TDB) == cursect)
v -= (VALUE)sloc;
else if ((aNexattr & TDB) != ABS)
error(rel_error);
}
else
{
- // Fixup the byte later
- AddFixup(FU_WBYTE|FU_SEXT|FU_PCREL, sloc, aNexpr);
+ // Fixup the byte later
+ AddFixup(FU_WBYTE | FU_SEXT | FU_PCREL, sloc, aNexpr);
D_word(w);
}
}
else
{
- AddFixup(FU_BYTE|FU_SEXT, sloc+1, aNexpr);
+ AddFixup(FU_BYTE | FU_SEXT, sloc + 1, aNexpr);
D_word(0);
}
case SIZN:
if (w)
{
- if (tdb)
- rmark(cursect, sloc, tdb, MWORD, NULL);
-
if (v + 0x10000 >= 0x20000)
return error(range_error);
+ if (tdb)
+ MarkRelocatable(cursect, sloc, tdb, MWORD, NULL);
+
D_word(v);
}
else
{
- AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr);
+ AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr);
D_word(0);
}
if (w)
{
if (tdb)
- rmark(cursect, sloc, tdb, MLONG, NULL);
+ MarkRelocatable(cursect, sloc, tdb, MLONG, NULL);
D_long(v);
}
break;
case ABSW:
- if (w)
+ if (w) // Defined
{
if (tdb)
- rmark(cursect, sloc, tdb, MWORD, NULL);
+ MarkRelocatable(cursect, sloc, tdb, MWORD, NULL);
if (v + 0x8000 >= 0x10000)
return error(range_error);
}
else
{
- AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr);
+ AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr);
D_word(0);
}
break;
case ABSL:
- if (w)
+ if (w) // Defined
{
if (tdb)
- rmark(cursect, sloc, tdb, MLONG, NULL);
+ MarkRelocatable(cursect, sloc, tdb, MLONG, NULL);
D_long(v);
}
case PCMPRE:
return error("unsupported 68020 addressing mode");
default:
- // Bad addressing mode in ea gen
+ // Bad addressing mode in ea gen
interror(3);
}
#undef aNexpr
#undef aNixreg
#undef aNixsiz
+#undef AnESYM