//
-// RMAC - Reboot's Macro Assembler for all Atari computers
+// RMAC - Renamed Macro Assembler for all Atari computers
// EAGEN0.C - Effective Address Code Generation
// Generated Code for eaN (Included twice by "eagen.c")
-// Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2021 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)
{
- uint32_t vbd, v = aNexval;
- WORD wbd, w = (WORD)(aNexattr & DEFINED);
- WORD tdbbd, tdb = (WORD)(aNexattr & TDB);
- vbd = aNbdexval;
- wbd = (WORD)(aNbdexattr & DEFINED);
- tdbbd = (WORD)(aNbdexattr & TDB);
+ uint32_t v = (uint32_t)aNexval;
+ WORD w = (WORD)(aNexattr & DEFINED);
+ WORD tdb = (WORD)(aNexattr & TDB);
+ uint32_t vbd = (uint32_t)aNbdexval;
+ WORD wbd = (WORD)(aNbdexattr & DEFINED);
+ WORD tdbbd = (WORD)(aNbdexattr & TDB);
+ uint8_t extDbl[12];
switch (amN)
{
case AM_NONE:
// This is a performance hit, though
break;
+
case ADISP:
// expr(An)
if (w)
if (tdb)
MarkRelocatable(cursect, sloc, tdb, MWORD, NULL);
- if ((v == 0) && CHECK_OPTS(OPT_INDIRECT_DISP) && !movep)
+ if ((v == 0) && CHECK_OPTS(OPT_OUTER_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
chptr_opcode[1] |= 0x0080 & 255; // slap in 010 bits
}
- if (sbra_flag)
- warn("0(An) converted to (An)");
+ if (optim_warn_flag)
+ warn("o3: 0(An) converted to (An)");
return OK;
}
}
break;
+
case PCDISP:
if (w)
{
}
break;
+
case AINDEXED:
// Compute ixreg and size+scale
w = (WORD)((aNixreg << 12) | aNixsiz);
}
break;
+
case PCINDEXED:
// Compute ixreg and size+scale
w = (WORD)((aNixreg << 12) | aNixsiz);
}
break;
+
case IMMED:
switch (siz)
{
if (v + 0x100 >= 0x200)
return error(range_error);
- D_word(v);
+ D_word(v & 0xFF);
}
else
{
}
break;
+
case SIZW:
case SIZN:
if (w)
}
break;
+
case SIZL:
if (w)
{
}
break;
+
+ case SIZS:
+ // 68881/68882/68040 only
+ if (w)
+ {
+//Would a floating point value *ever* need to be fixed up as if it were an address? :-P
+// if (tdb)
+// MarkRelocatable(cursect, sloc, tdb, MSINGLE, NULL);
+
+ // The value passed back from expr() is an internal C double;
+ // so we have to access it as such then convert it to an
+ // IEEE-754 float so we can store it as such in the instruction
+ // stream here.
+ PTR p;
+ p.u64 = &aNexval;
+ float f = (float)*p.dp;
+ uint32_t ieee754 = FloatToIEEE754(f);
+ D_long(ieee754);
+ }
+ else
+ {
+ AddFixup(FU_FLOATSING, sloc, aNexpr);
+ D_long(0); // IEEE-754 zero is all zeroes
+ }
+
+ break;
+
+ case SIZD:
+ // 68881/68882/68040 only
+ if (w)
+ {
+//Would a floating point value *ever* need to be fixed up as if it were an address? :-P
+// if (tdb)
+// MarkRelocatable(cursect, sloc, tdb, MDOUBLE, NULL);
+
+ PTR p;
+ p.u64 = &aNexval;
+ double d = *p.dp;
+ uint64_t ieee754 = DoubleToIEEE754(d);
+ D_quad(ieee754);
+ }
+ else
+ {
+ AddFixup(FU_FLOATDOUB, sloc, aNexpr);
+ D_quad(0LL); // IEEE-754 zero is all zeroes
+ }
+
+ break;
+
+ case SIZX:
+ // 68881/68882/68040 only
+ if (w)
+ {
+//Would a floating point value *ever* need to be fixed up as if it were an address? :-P
+// if (tdb)
+// MarkRelocatable(cursect, sloc, tdb, MEXTEND, NULL);
+
+ PTR p;
+ p.u64 = &aNexval;
+ DoubleToExtended(*p.dp, extDbl);
+ D_extend(extDbl);
+ }
+ else
+ {
+ // Why would this be anything other than a floating point
+ // expression??? Even if there were an undefined symbol in
+ // the expression, how would that be relevant? I can't see
+ // any use case where this would make sense.
+ AddFixup(FU_FLOATDOUB, sloc, aNexpr);
+ memset(extDbl, 0, 12);
+ D_extend(extDbl);
+ }
+
+ break;
+
default:
// IMMED size problem
interror(1);
}
break;
+
case SIZP:
// 68881/68882/68040 only
return error("Sorry, .p constant format is not implemented yet!");
break;
+
case ABSW:
if (w) // Defined
{
}
break;
+
case ABSL:
if (w) // Defined
{
+ if (CHECK_OPTS(OPT_PC_RELATIVE))
+ {
+ if ((aNexattr & (DEFINED | REFERENCED | EQUATED)) == (DEFINED | REFERENCED))
+ return error("relocation not allowed when o10 is enabled");
+ }
+
if (tdb)
MarkRelocatable(cursect, sloc, tdb, MLONG, NULL);
}
break;
+
case DINDW:
D_word((0x190 | (aNixreg << 12)));
break;
+
case DINDL:
D_word((0x990 | (aNixreg << 12)));
break;
+
case ABASE:
case MEMPOST:
case MEMPRE:
case PCMPOST:
case PCMPRE:
D_word(aNexten);
+
// Deposit bd (if not suppressed)
if ((aNexten & 0x0030) == EXT_BDSIZE0)
{
else
{
// Arrange for fixup later on
- AddFixup(FU_WORD|FU_SEXT, sloc, aNbexpr);
+ AddFixup(FU_WORD | FU_SEXT | FU_PCRELX, sloc, aNbexpr);
D_word(0);
}
}
D_long(0);
}
}
+
// Deposit od (if not suppressed)
- if ((aNexten&7)==EXT_IISPRE0 || (aNexten&7)==EXT_IISPREN
- || (aNexten&7)==EXT_IISNOIN || (aNexten&7)==EXT_IISPOSN)
+ if ((aNexten & 7) == EXT_IISPRE0 || (aNexten & 7) == EXT_IISPREN
+ || (aNexten & 7) == EXT_IISNOIN || (aNexten & 7) == EXT_IISPOSN)
{
// Don't deposit anything (suppressed)
}
- else if ((aNexten&7)==EXT_IISPREW
- || (aNexten&7)==EXT_IISPOSW || (aNexten&7)==EXT_IISNOIW)
+ else if ((aNexten & 7) == EXT_IISPREW
+ || (aNexten & 7) == EXT_IISPOSW || (aNexten & 7) == EXT_IISNOIW)
{
// Deposit word od
if (w)
else
{
// Arrange for fixup later on
- AddFixup(FU_WORD|FU_SEXT, sloc, aNexpr);
+ AddFixup(FU_WORD | FU_SEXT, sloc, aNexpr);
D_word(0);
}
}
else
{
// Arrange for fixup later on
- AddFixup(FU_LONG|FU_SEXT, sloc, aNexpr);
+ AddFixup(FU_LONG | FU_SEXT, sloc, aNexpr);
D_long(0);
}
}
break;
//return error("unsupported 68020 addressing mode");
+
default:
// Bad addressing mode in ea gen
interror(3);
projects / rmac / blobdiff