2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
3 // PROCLN.C - Line Processing
4 // Copyright (C) 199x Landon Dyer, 2017 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source utilised with the kind permission of Landon Dyer
22 #define DEF_KW // Declare keyword values
23 #include "kwtab.h" // Incl generated keyword tables & defs
25 #define DEF_MN // Incl 68k keyword definitions
26 #define DECL_MN // Incl 68k keyword state machine tables
33 #define DEF_MP // Include 6502 keyword definitions
34 #define DECL_MP // Include 6502 keyword state machine tables
37 IFENT * ifent; // Current ifent
38 static IFENT ifent0; // Root ifent
39 static IFENT * f_ifent; // Freelist of ifents
40 static int disabled; // Assembly conditionally disabled
41 int just_bss; // 1, ds.b in microprocessor mode
42 VALUE pcloc; // Value of "PC" at beginning of line
43 SYM * lab_sym; // Label on line (or NULL)
44 int bfparam1; // bfxxx instruction parameters
45 int bfparam2; // bfxxx instruction parameters
47 const char extra_stuff[] = "extra (unexpected) text found after addressing mode";
48 const char comma_error[] = "missing comma";
49 const char syntax_error[] = "syntax error";
50 const char locgl_error[] = "cannot GLOBL local symbol";
51 const char lab_ignored[] = "label ignored";
53 // Table to convert an addressing-mode number to a bitmask.
54 LONG amsktab[0124] = {
55 M_DREG, M_DREG, M_DREG, M_DREG,
56 M_DREG, M_DREG, M_DREG, M_DREG,
58 M_AREG, M_AREG, M_AREG, M_AREG,
59 M_AREG, M_AREG, M_AREG, M_AREG,
61 M_AIND, M_AIND, M_AIND, M_AIND,
62 M_AIND, M_AIND, M_AIND, M_AIND,
64 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
65 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
67 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
68 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
70 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
71 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
73 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
74 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
100 M_CREG, // 0120 (caches - TODO: is this correct or does it need its own bitfield?)
107 // Function prototypes
108 int HandleLabel(char *, int);
112 // Initialize line processor
114 void InitLineProcessor(void)
118 f_ifent = ifent0.if_prev = NULL;
128 int state; // Keyword machine state (output)
129 int j; // Random int, must be fast
130 char * p; // Random char ptr, must be fast
131 TOKEN * tk; // First token in line
132 char * label; // Symbol (or NULL)
133 char * equate; // Symbol (or NULL)
134 int labtyp = 0; // Label type (':', DCOLON)
135 int equtyp = 0; // Equ type ('=', DEQUALS)
136 VALUE eval; // Expression value
137 WORD eattr; // Expression attributes
138 SYM * esym; // External symbol involved in expr.
139 WORD siz = 0; // Size suffix to mnem/diretve/macro
140 LONG amsk0, amsk1; // Address-type masks for ea0, ea1
141 MNTAB * m; // Code generation table pointer
142 SYM * sy, * sy2; // Symbol (temp usage)
143 char * opname = NULL; // Name of dirctve/mnemonic/macro
144 int listflag; // 0: Don't call listeol()
145 WORD rmask; // Register list, for REG
146 int registerbank; // RISC register bank
147 int riscreg; // RISC register
148 listflag = 0; // Initialise listing flag
150 loop: // Line processing loop label
152 // Get another line of tokens
153 if (TokenizeLine() == TKEOF)
155 if (debug) printf("Assemble: Found TKEOF flag...\n");
156 if (list_flag && listflag) // Flush last line of source
159 if (ifent->if_prev != NULL) // Check conditional token
160 error("hit EOF without finding matching .endif");
165 DEBUG DumpTokenBuffer();
169 if (listflag && listing > 0)
170 listeol(); // Tell listing generator about EOL
172 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
173 listflag = 1; // OK to call `listeol' now
174 just_bss = 0; // Reset just_bss mode
177 state = -3; // No keyword (just EOL)
178 label = NULL; // No label
179 lab_sym = NULL; // No (exported) label
180 equate = NULL; // No equate
181 tk = tok; // Save first token in line
182 pcloc = (VALUE)sloc; // Set beginning-of-line PC
184 loop1: // Internal line processing loop
186 if (*tok == EOL) // Restart loop if end-of-line
189 // First token MUST be a symbol (Shamus: not sure why :-/)
192 if (*tok>=KW_D0 && *tok<=KW_R31)
193 error("cannot use reserved keyword as label name or .equ");
195 error("syntax error; expected symbol");
199 j = (int)tok[2]; // Skip equates (normal statements)
201 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
203 equate = string[tok[1]];
209 // Skip past label (but record it)
210 if (j == ':' || j == DCOLON)
213 label = string[tok[1]]; // Get label name
214 labtyp = tok[2]; // Get label type
215 tok += 3; // Go to next line token
218 // Looks like another label follows the previous one, so handle
219 // the previous one until there aren't any more
220 if (as68_flag && (*tok == SYMBOL && tok[2] == ':'))
222 if (HandleLabel(label, labtyp) != 0)
229 // EOL is legal here...
233 // Next token MUST be a symbol
234 if (*tok++ != SYMBOL)
236 error("syntax error; expected symbol");
240 opname = p = string[*tok++];
242 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
243 // On output, `state' will have one of the values:
244 // -3 there was no symbol (EOL)
245 // -2..-1 the symbol didn't match any keyword
246 // 0..499 vanilla directives (dc, ds, etc.)
247 // 500..999 electric directives (macro, rept, etc.)
248 // 1000..+ mnemonics (move, lsr, etc.)
249 for(state=0; state>=0;)
251 j = mnbase[state] + (int)tolowertab[*p];
253 // Reject, character doesn't match
254 if (mncheck[j] != state)
256 state = -1; // No match
260 // Must accept or reject at EOS
263 state = mnaccept[j]; // (-1 on no terminal match)
270 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
275 else if (*tok == DOTL)
277 else if (*tok == DOTB)
279 else if(*tok == DOTD)
281 else if(*tok == DOTP)
283 else if(*tok == DOTQ)
285 else if(*tok == DOTS)
287 else if(*tok == DOTX)
291 // Do special directives (500..999) (These must be handled in "real time")
292 if (state >= 500 && state < 1000)
305 case MN_IIF: // .iif --- immediate if
306 if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
309 if (!(eattr & DEFINED))
325 case MN_MACRO: // .macro --- macro definition
328 // Label on a macro definition is bad mojo... Warn the user
336 case MN_EXITM: // .exitm --- exit macro
337 case MN_ENDM: // .endm --- same as .exitm
350 // Handle labels on REPT directive lines...
353 if (HandleLabel(label, labtyp) != 0)
363 error("mis-nested .endr");
370 if (disabled) // Conditionally disabled code
376 // Pick global or local symbol enviroment
377 j = (*equate == '.' ? curenv : 0);
378 sy = lookup(equate, LABEL, j);
382 sy = NewSymbol(equate, LABEL, j);
385 if (equtyp == DEQUALS)
387 // Can't GLOBAL a local symbol
397 else if ((sy->sattr & DEFINED) && equtyp != SET)
399 if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
401 //REALLY? sy->sattre |= ~UNDEF_EQUR;
402 sy->sattre &= ~UNDEF_EQUR;
405 else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
407 //REALLY? sy->sattre |= ~UNDEF_CC;
408 sy->sattre &= ~UNDEF_CC;
413 errors("multiple equate to '%s'", sy->sname);
418 // Put symbol in "order of definition" list if it's not already there
419 AddToSymbolDeclarationList(sy);
421 // Parse value to equate symbol to;
425 if (equtyp == EQUREG)
427 //Linko's request to issue a warning on labels that equated to the same
428 //register would go here. Not sure how to implement it though. :-/
431 have an array of bools with 64 entries. Whenever a register is equated, set the
432 corresponding register bool to true. Whenever it's undef'ed, set it to false.
433 When checking to see if it's already been equated, issue a warning.
435 // Check that we are in a RISC section
438 error(".equr/.regequ must be defined in .gpu/.dsp section");
442 // Check for register to equate to
443 if ((*tok >= KW_R0) && (*tok <= KW_R31))
445 // sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
446 sy->sattre = EQUATEDREG; // Mark as equated register
447 riscreg = (*tok - KW_R0);
448 //is there any reason to do this, since we're putting this in svalue?
449 //i'm thinking, no. Let's test that out! :-D
450 // sy->sattre |= (riscreg << 8); // Store register number
451 //everything seems to build fine without it... We'll leave it here Just In Case(tm)
453 #define DEBODGE_REGBANK
454 #ifdef DEBODGE_REGBANK
455 // Default is current state of "regbank"
456 registerbank = regbank;
458 // Default is no register bank specified
459 registerbank = BANK_N;
462 // Check for ",<bank #>" override notation
463 if ((tok[1] == ',') && (tok[2] == CONST))
465 // Advance token pointer to the constant
468 // Anything other than a 0 or a 1 will result in "No Bank"
470 registerbank = BANK_0;
472 registerbank = BANK_1;
475 #ifdef DEBODGE_REGBANK
476 sy->sattre |= registerbank; // Store register bank
478 // What needs to happen here is to prime registerbank with regbank, then use
479 // registerbank down below for the bank marking.
480 #warning "!!! regbank <-> registerbank confusion here !!!"
481 // The question here is why, if we're allowed to override the ".regbankN" rules
482 // above, then why is it using the one set by the directive in the extended
483 // attributes and not in what ends up in symbol->svalue?
484 // ".regbankN" is not an original Madmac directive, so it's suspect
485 sy->sattre |= regbank; // Store register bank
487 eattr = ABS | DEFINED | GLOBAL;
488 // & what does this $80000080 constant mean???
489 // eval = 0x80000080 + (riscreg) + (registerbank << 8);
493 // Checking for a register symbol
494 else if (tok[0] == SYMBOL)
496 sy2 = lookup(string[tok[1]], LABEL, j);
498 // Make sure symbol is a valid equreg
499 if (!sy2 || !(sy2->sattre & EQUATEDREG))
501 error("invalid GPU/DSP .equr/.regequ definition");
506 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
507 sy->sattre = sy2->sattre;
508 eval = (sy2->svalue & 0xFFFFF0FF);
514 error("invalid GPU/DSP .equr/.regequ definition");
518 else if (equtyp == REG)
520 if (reglist(&rmask) < 0)
524 eattr = ABS | DEFINED;
526 else if (equtyp == CCDEF)
528 sy->sattre |= EQUATEDCC;
529 eattr = ABS | DEFINED | GLOBAL;
531 if (tok[0] == SYMBOL)
533 sy2 = lookup(string[tok[1]], LABEL, j);
535 if (!sy2 || !(sy2->sattre & EQUATEDCC))
537 error("invalid gpu/dsp .ccdef definition");
542 eattr = ABS | DEFINED | GLOBAL;
543 sy->sattre = sy2->sattre;
548 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
552 else if (*tok == SYMBOL)
554 sy2 = lookup(string[tok[1]], LABEL, j);
556 if (sy2 && (sy2->sattre & EQUATEDREG))
558 sy->stype = sy2->stype;
559 sy->sattr = sy2->sattr;
560 sy->sattre = sy2->sattre;
561 //ICK sy->svalue = (sy2->svalue & 0xFFFFF0FF);
562 sy->svalue = sy2->svalue;
565 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
568 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
571 if (!(eattr & DEFINED))
577 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
580 if (list_flag) // Put value in listing
583 at_eol(); // Must be at EOL now
590 // Non-zero == error occurred
591 if (HandleLabel(label, labtyp) != 0)
599 // If we're in 6502 mode and are still in need of a mnemonic, then search
600 // for valid 6502 mnemonic.
601 if (m6502 && (state < 0 || state >= 1000))
604 state = kmatch(opname, mpbase, mpcheck, mptab, mpaccept);
606 for(state=0, p=opname; state>= 0; )
608 j = mpbase[state] + tolowertab[*p];
610 if (mpcheck[j] != state) // Reject, character doesn't match
612 state = -1; // No match
617 { // Must accept or reject at EOS
618 state = mpaccept[j]; // (-1 on no terminal match)
626 // Call 6502 code generator if we found a mnemonic
629 m6502cg(state - 2000);
634 // If we are in GPU or DSP mode and still in need of a mnemonic then search
636 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
638 for(state=0, p=opname; state>=0;)
640 j = mrbase[state] + (int)tolowertab[*p];
642 // Reject, character doesn't match
643 if (mrcheck[j] != state)
645 state = -1; // No match
649 // Must accept or reject at EOS
652 state = mraccept[j]; // (-1 on no terminal match)
659 // Call RISC code generator if we found a mnemonic
662 GenerateRISCCode(state);
667 // Invoke macro or complain about bad mnemonic
670 if ((sy = lookup(opname, MACRO, 0)) != NULL)
671 InvokeMacro(sy, siz);
673 errors("unknown op '%s'", opname);
678 // Call directive handlers
681 (*dirtab[state])(siz);
686 // o can't deposit instrs in BSS or ABS
687 // o do automatic .EVEN for instrs
688 // o allocate space for largest possible instr
689 // o can't do ".b" operations with an address register
692 error("cannot initialize non-storage (BSS) section");
696 if (sloc & 1) // Automatic .even
699 if (challoc - ch_size < 18) // Make sure have space in current chunk
702 m = &machtab[state - 1000];
704 // Call special-mode handler
705 if (m->mnattr & CGSPECIAL)
707 (*m->mnfunc)(m->mninst, siz);
711 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
717 amsk0 = amsktab[am0];
718 amsk1 = amsktab[am1];
720 // Catch attempts to use ".B" with an address register (yes, this check
721 // does work at this level)
722 if (siz == SIZB && (am0 == AREG || am1 == AREG))
724 error("cannot use '.b' with an address register");
728 // Keep a backup of chptr (used for optimisations during codegen)
729 chptr_opcode = chptr;
733 if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
735 (*m->mnfunc)(m->mninst, siz);
739 m = &machtab[m->mncont];
745 // Handle the creation of labels
747 int HandleLabel(char * label, int labelType)
749 // Check for dot in front of label; means this is a local label if present
750 int environment = (*label == '.' ? curenv : 0);
751 SYM * symbol = lookup(label, LABEL, environment);
755 symbol = NewSymbol(label, LABEL, environment);
757 // symbol->sattre = RISCSYM;
760 else if (symbol->sattr & DEFINED)
761 return errors("multiply-defined label '%s'", label);
763 // Put symbol in "order of definition" list if it's not already in it
764 AddToSymbolDeclarationList(symbol);
768 symbol->svalue = orgaddr;
769 symbol->sattr |= ABS | DEFINED | EQUATED;
773 symbol->svalue = sloc;
774 symbol->sattr |= DEFINED | cursect;
779 if (0 == environment)
782 // Make label global if it has a double colon
783 if (labelType == DCOLON)
785 if (environment != 0)
786 return error(locgl_error);
788 symbol->sattr |= GLOBAL;
796 // .if, Start conditional assembly
806 if ((rif = f_ifent) == NULL)
807 rif = (IFENT *)malloc(sizeof(IFENT));
809 f_ifent = rif->if_prev;
811 rif->if_prev = ifent;
816 if (expr(exprbuf, &eval, &eattr, &esym) != OK)
819 if ((eattr & DEFINED) == 0)
820 return error(undef_error);
825 rif->if_state = (WORD)disabled;
831 // .else, Do alternate case for .if
837 if (rif->if_prev == NULL)
838 return error("mismatched .else");
841 disabled = rif->if_prev->if_state;
845 rif->if_state = (WORD)disabled;
851 // .endif, End of conditional assembly block
852 // This is also called by fpop() to pop levels of IFENTs in case a macro or
853 // include file exits early with `exitm' or `end'.
859 if (rif->if_prev == NULL)
860 return error("mismatched .endif");
862 ifent = rif->if_prev;
863 disabled = rif->if_prev->if_state;
864 rif->if_prev = f_ifent;