//
// RMAC - Reboot's Macro Assembler for all Atari computers
// DIRECT.C - Directive Handling
-// Copyright (C) 199x Landon Dyer, 2011-2019 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2020 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
// Source utilised with the kind permission of Landon Dyer
//
int d_comm(void);
int d_dc(WORD);
int d_ds(WORD);
+int d_dsm(WORD);
int d_dcb(WORD);
int d_globl(void);
int d_gpu(void);
d_nofpu, // 65 nofpu
d_opt, // 66 .opt
d_objproc, // 67 .objproc
+ d_dsm, // 68 .dsm
};
return 0;
// Check to see if the value being passed in is negative (who the hell does
- // that?--nobody does; it's the code gremlins, or rum, that does it)
- // N.B.: Since 'eval' is of type uint32_t, if it goes negative, it will have
- // its high bit set.
- if (eval & 0x80000000)
- return error("negative sizes not allowed");
+ // that?--nobody does; it's the code gremlins, or rum, what does it)
+ // N.B.: Since 'eval' is of type uint64_t, if it goes negative, it will
+ // have its high bit set.
+ if (eval & 0x8000000000000000)
+ return error("negative sizes not allowed in DS");
// In non-TDB section (BSS, ABS and M6502) just advance the location
// counter appropriately. In TDB sections, deposit (possibly large) chunks
just_bss = 1; // No data deposited (8-bit CPU mode)
}
+ else if (cursect & M56KPXYL)
+ {
+ // Change segment instead of marking blanks.
+ // Only mark segments we actually wrote something
+ if (chptr != dsp_currentorg->start && dsp_written_data_in_current_org)
+ {
+ dsp_currentorg->end = chptr;
+ dsp_currentorg++;
+ dsp_currentorg->memtype = dsp_currentorg[-1].memtype;
+ }
+
+ listvalue((uint32_t)eval);
+ sloc += (uint32_t)eval;
+
+ // And now let's create a new segment
+ dsp_currentorg->start = chptr;
+ dsp_currentorg->chunk = scode; // Mark down which chunk this org starts from (will be needed when outputting)
+ sect[cursect].orgaddr = sloc;
+ dsp_currentorg->orgadr = sloc;
+ dsp_written_data_in_current_org = 0;
+
+ just_bss = 1; // No data deposited
+ }
else
{
- dep_block(eval, siz, 0, (WORD)(DEFINED | ABS), NULL);
+ dep_block(eval, siz, 0, (DEFINED | ABS), NULL);
}
ErrorIfNotAtEOL();
- return 0;
+ return OK;
+}
+
+
+//
+// dsm[.siz] expression
+// Define modulo storage
+// Quoting the Motorola assembler manual:
+// "The DSM directive reserves a block of memory the length of which in words is equal to
+// the value of <expression>.If the runtime location counter is not zero, this directive first
+// advances the runtime location counter to a base address that is a multiple of 2k, where
+// 2k >= <expression>."
+// The kicker of course is written a few sentences after:
+// "<label>, if present, will be assigned the value of the runtime location counter after a valid
+// base address has been established."
+//
+int d_dsm(WORD siz)
+{
+ TOKEN * tok_current = tok; // Keep track of where tok was when we entered this procedure
+ uint64_t eval;
+
+ if (abs_expr(&eval) != OK)
+ return 0;
+
+ // Round up to the next highest power of 2
+ // Nicked from https://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
+ eval--;
+ eval |= eval >> 1;
+ eval |= eval >> 2;
+ eval |= eval >> 4;
+ eval |= eval >> 8;
+ eval |= eval >> 16;
+
+ int units_to_skip;
+ units_to_skip = eval + 1 - sloc;
+ sloc += units_to_skip; // Bump up sloc - TODO: check if this goes over the RAM limits?
+
+ // If a label has been defined in the same line as dsm, its value also needs to be adjusted
+ if (label_defined)
+ {
+ SYM * label = lookup(label_defined, LABEL, 0);
+ label->svalue += units_to_skip;
+ }
+
+ tok = tok_current; // Rewind tok back to where it was
+ return d_ds(siz); // And let d_ds take over from here
}
//
-// dc.b, dc.w / dc, dc.l, dc.i, dc.q, dc.d
+// dc.b, dc.w / dc, dc.l, dc.i, dc.q, dc.d, dc.s, dc.x
//
int d_dc(WORD siz)
{
}
break;
+
case SIZW:
case SIZN:
if (!defined)
}
break;
+
case SIZL:
// Shamus: Why can't we do longs in 6502 mode?
if (m6502)
if (!defined)
{
- if (movei)
- AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
- else
- AddFixup(FU_LONG, sloc, exprbuf);
-
+ AddFixup(FU_LONG | (movei ? FU_MOVEI : 0), sloc, exprbuf);
D_long(0);
}
else
}
break;
+
case SIZQ:
// 64-bit size
if (m6502)
return error(in_6502mode);
- // Shamus: We only handle DC.Q type stuff, will have to add fixups
- // and stuff later (maybe... might not be needed...)
// DEFINITELY NEED FIXUPS HERE!
if (!defined)
{
AddFixup(FU_QUAD, sloc, exprbuf);
- D_quad(0LL);
- }
- else
- {
- D_quad(eval);
+ eval = 0;
}
+ D_quad(eval);
break;
+
case SIZS:
// 32-bit float size
if (m6502)
return error(in_6502mode);
+/* Seems to me that if something is undefined here, then that should be an error. Likewise for the D & X variants. */
if (!defined)
{
- AddFixup(FU_FLOATSING, sloc, exprbuf);
- D_long(0);
+// AddFixup(FU_FLOATSING, sloc, exprbuf);
+// D_long(0);
+ return error("labels not allowed in floating point expressions");
}
else
{
}
break;
+
case SIZD:
// 64-bit double size
if (m6502)
if (!defined)
{
- AddFixup(FU_FLOATDOUB, sloc, exprbuf);
- D_quad(0LL);
+// AddFixup(FU_FLOATDOUB, sloc, exprbuf);
+// D_quad(0LL);
+ return error("labels not allowed in floating point expressions");
}
else
{
}
break;
+
case SIZX:
if (m6502)
return error(in_6502mode);
if (!defined)
{
- AddFixup(FU_FLOATEXT, sloc, exprbuf);
- D_extend(extDbl);
+// AddFixup(FU_FLOATEXT, sloc, exprbuf);
+// D_extend(extDbl);
+ return error("labels not allowed in floating point expressions");
}
else
{
//
int dep_block(uint32_t count, WORD siz, uint32_t eval, WORD eattr, TOKEN * exprbuf)
{
- WORD tdb;
- WORD defined;
-
- tdb = (WORD)(eattr & TDB);
- defined = (WORD)(eattr & DEFINED);
+ WORD tdb = eattr & TDB;
+ WORD defined = eattr & DEFINED;
while (count--)
{
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