2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
3 // PROCLN.C - Line Processing
4 // Copyright (C) 199x Landon Dyer, 2011 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
21 #define DEF_KW // Declare keyword values
22 #include "kwtab.h" // Incl generated keyword tables & defs
24 #define DEF_MN // Incl 68k keyword definitions
25 #define DECL_MN // Incl 68k keyword state machine tables
33 IFENT * ifent; // Current ifent
34 static IFENT ifent0; // Root ifent
35 static IFENT * f_ifent; // Freelist of ifents
36 static int disabled; // Assembly conditionally disabled
37 int just_bss; // 1, ds.b in microprocessor mode
38 VALUE pcloc; // Value of "PC" at beginning of line
39 IFENT * ifent; // Current ifent
40 SYM * lab_sym; // Label on line (or NULL)
42 const char extra_stuff[] = "extra (unexpected) text found after addressing mode";
43 const char comma_error[] = "missing comma";
44 const char syntax_error[] = "syntax error";
45 const char locgl_error[] = "cannot GLOBL local symbol";
46 const char lab_ignored[] = "label ignored";
48 // Table to convert an addressing-mode number to a bitmask.
49 LONG amsktab[0112] = {
50 M_DREG, M_DREG, M_DREG, M_DREG,
51 M_DREG, M_DREG, M_DREG, M_DREG,
53 M_AREG, M_AREG, M_AREG, M_AREG,
54 M_AREG, M_AREG, M_AREG, M_AREG,
56 M_AIND, M_AIND, M_AIND, M_AIND,
57 M_AIND, M_AIND, M_AIND, M_AIND,
59 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
60 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
62 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
63 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
65 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
66 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
68 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
69 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
92 // Function prototypes
93 int HandleLabel(char *, int);
97 // Initialize line processor
99 void InitLineProcessor(void)
103 f_ifent = ifent0.if_prev = NULL;
113 int state; // Keyword machine state (output)
114 int j; // Random int, must be fast
115 char * p; // Random char ptr, must be fast
116 TOKEN * tk; // First token in line
117 char * label; // Symbol (or NULL)
118 char * equate; // Symbol (or NULL)
119 int labtyp = 0; // Label type (':', DCOLON)
120 int equtyp = 0; // Equ type ('=', DEQUALS)
121 VALUE eval; // Expression value
122 WORD eattr; // Expression attributes
123 SYM * esym; // External symbol involved in expr.
124 WORD siz = 0; // Size suffix to mnem/diretve/macro
125 LONG amsk0, amsk1; // Address-type masks for ea0, ea1
126 MNTAB * m; // Code generation table pointer
127 SYM * sy, * sy2; // Symbol (temp usage)
128 char * opname = NULL; // Name of dirctve/mnemonic/macro
129 int listflag; // 0: Don't call listeol()
130 WORD rmask; // Register list, for REG
131 int registerbank; // RISC register bank
132 int riscreg; // RISC register
133 listflag = 0; // Initialise listing flag
135 loop: // Line processing loop label
137 // Get another line of tokens
138 if (TokenizeLine() == TKEOF)
140 if (verb_flag) printf("Assemble: Found TKEOF flag...\n");
141 if (list_flag && listflag) // Flush last line of source
144 if (ifent->if_prev != NULL) // Check conditional token
145 error("hit EOF without finding matching .endif");
150 DEBUG DumpTokenBuffer();
154 if (listflag && listing > 0)
155 listeol(); // Tell listing generator about EOL
157 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
158 listflag = 1; // OK to call `listeol' now
159 just_bss = 0; // Reset just_bss mode
162 state = -3; // No keyword (just EOL)
163 label = NULL; // No label
164 lab_sym = NULL; // No (exported) label
165 equate = NULL; // No equate
166 tk = tok; // Save first token in line
167 pcloc = (VALUE)sloc; // Set beginning-of-line PC
169 loop1: // Internal line processing loop
171 if (*tok == EOL) // Restart loop if end-of-line
174 // First token MUST be a symbol (Shamus: not sure why :-/)
177 error("syntax error; expected symbol");
181 j = (int)tok[2]; // Skip equates (normal statements)
183 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
185 equate = string[tok[1]];
191 // Skip past label (but record it)
192 if (j == ':' || j == DCOLON)
195 label = string[tok[1]]; // Get label name
196 labtyp = tok[2]; // Get label type
197 tok += 3; // Go to next line token
200 // Looks like another label follows the previous one, so handle
201 // the previous one until there aren't any more
202 if (as68_flag && (*tok == SYMBOL && tok[2] == ':'))
204 if (HandleLabel(label, labtyp) != 0)
211 // EOL is legal here...
215 // Next token MUST be a symbol
216 if (*tok++ != SYMBOL)
218 error("syntax error; expected symbol");
222 opname = p = string[*tok++];
224 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
225 // On output, `state' will have one of the values:
226 // -3 there was no symbol (EOL)
227 // -2..-1 the symbol didn't match any keyword
228 // 0..499 vanilla directives (dc, ds, etc.)
229 // 500..999 electric directives (macro, rept, etc.)
230 // 1000..+ mnemonics (move, lsr, etc.)
231 for(state=0; state>=0;)
233 j = mnbase[state] + (int)tolowertab[*p];
235 // Reject, character doesn't match
236 if (mncheck[j] != state)
238 state = -1; // No match
242 // Must accept or reject at EOS
245 state = mnaccept[j]; // (-1 on no terminal match)
252 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
257 else if (*tok == DOTL)
259 else if (*tok == DOTB)
262 // Do special directives (500..999) (These must be handled in "real time")
263 if (state >= 500 && state < 1000)
276 case MN_IIF: // .iif --- immediate if
277 if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
280 if (!(eattr & DEFINED))
296 case MN_MACRO: // .macro --- macro definition
299 // Label on a macro definition is bad mojo... Warn the user
307 case MN_EXITM: // .exitm --- exit macro
308 case MN_ENDM: // .endm --- same as .exitm
321 // Handle labels on REPT directive lines...
324 if (HandleLabel(label, labtyp) != 0)
334 error("mis-nested .endr");
341 if (disabled) // Conditionally disabled code
347 // Pick global or local symbol enviroment
348 j = (*equate == '.' ? curenv : 0);
349 sy = lookup(equate, LABEL, j);
353 sy = NewSymbol(equate, LABEL, j);
356 if (equtyp == DEQUALS)
358 // Can't GLOBAL a local symbol
368 else if ((sy->sattr & DEFINED) && equtyp != SET)
370 if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
372 //REALLY? sy->sattre |= ~UNDEF_EQUR;
373 sy->sattre &= ~UNDEF_EQUR;
376 else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
378 //REALLY? sy->sattre |= ~UNDEF_CC;
379 sy->sattre &= ~UNDEF_CC;
384 errors("multiple equate to '%s'", sy->sname);
389 // Put symbol in "order of definition" list if it's not already there
390 AddToSymbolDeclarationList(sy);
392 // Parse value to equate symbol to;
396 if (equtyp == EQUREG)
398 //Linko's request to issue a warning on labels that equated to the same
399 //register would go here. Not sure how to implement it though. :-/
402 have an array of bools with 64 entries. Whenever a register is equated, set the
403 corresponding register bool to true. Whenever it's undef'ed, set it to false.
404 When checking to see if it's already been equated, issue a warning.
406 // Check that we are in a RISC section
409 error(".equr/.regequ must be defined in .gpu/.dsp section");
413 // Check for register to equate to
414 if ((*tok >= KW_R0) && (*tok <= KW_R31))
416 // sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
417 sy->sattre = EQUATEDREG; // Mark as equated register
418 riscreg = (*tok - KW_R0);
419 //is there any reason to do this, since we're putting this in svalue?
420 //i'm thinking, no. Let's test that out! :-D
421 // sy->sattre |= (riscreg << 8); // Store register number
422 //everything seems to build fine without it... We'll leave it here Just In Case(tm)
424 #define DEBODGE_REGBANK
425 #ifdef DEBODGE_REGBANK
426 // Default is current state of "regbank"
427 registerbank = regbank;
429 // Default is no register bank specified
430 registerbank = BANK_N;
433 // Check for ",<bank #>" override notation
434 if ((tok[1] == ',') && (tok[2] == CONST))
436 // Advance token pointer to the constant
439 // Anything other than a 0 or a 1 will result in "No Bank"
441 registerbank = BANK_0;
443 registerbank = BANK_1;
446 #ifdef DEBODGE_REGBANK
447 sy->sattre |= registerbank; // Store register bank
449 // What needs to happen here is to prime registerbank with regbank, then use
450 // registerbank down below for the bank marking.
451 #warning "!!! regbank <-> registerbank confusion here !!!"
452 // The question here is why, if we're allowed to override the ".regbankN" rules
453 // above, then why is it using the one set by the directive in the extended
454 // attributes and not in what ends up in symbol->svalue?
455 // ".regbankN" is not an original Madmac directive, so it's suspect
456 sy->sattre |= regbank; // Store register bank
458 eattr = ABS | DEFINED | GLOBAL;
459 // & what does this $80000080 constant mean???
460 // eval = 0x80000080 + (riscreg) + (registerbank << 8);
464 // Checking for a register symbol
465 else if (tok[0] == SYMBOL)
467 sy2 = lookup(string[tok[1]], LABEL, j);
469 // Make sure symbol is a valid equreg
470 if (!sy2 || !(sy2->sattre & EQUATEDREG))
472 error("invalid GPU/DSP .equr/.regequ definition");
477 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
478 sy->sattre = sy2->sattre;
479 eval = (sy2->svalue & 0xFFFFF0FF);
485 error("invalid GPU/DSP .equr/.regequ definition");
489 else if (equtyp == REG)
491 if (reglist(&rmask) < 0)
495 eattr = ABS | DEFINED;
497 else if (equtyp == CCDEF)
499 sy->sattre |= EQUATEDCC;
500 eattr = ABS | DEFINED | GLOBAL;
502 if (tok[0] == SYMBOL)
504 sy2 = lookup(string[tok[1]], LABEL, j);
506 if (!sy2 || !(sy2->sattre & EQUATEDCC))
508 error("invalid gpu/dsp .ccdef definition");
513 eattr = ABS | DEFINED | GLOBAL;
514 sy->sattre = sy2->sattre;
519 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
523 else if (*tok == SYMBOL)
525 sy2 = lookup(string[tok[1]], LABEL, j);
527 if (sy2 && (sy2->sattre & EQUATEDREG))
529 sy->stype = sy2->stype;
530 sy->sattr = sy2->sattr;
531 sy->sattre = sy2->sattre;
532 //ICK sy->svalue = (sy2->svalue & 0xFFFFF0FF);
533 sy->svalue = sy2->svalue;
536 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
539 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
542 if (!(eattr & DEFINED))
548 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
551 if (list_flag) // Put value in listing
554 at_eol(); // Must be at EOL now
561 // Non-zero == error occurred
562 if (HandleLabel(label, labtyp) != 0)
570 // If we are in GPU or DSP mode and still in need of a mnemonic then search
572 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
574 for(state=0, p=opname; state>=0;)
576 j = mrbase[state] + (int)tolowertab[*p];
578 // Reject, character doesn't match
579 if (mrcheck[j] != state)
581 state = -1; // No match
585 // Must accept or reject at EOS
588 state = mraccept[j]; // (-1 on no terminal match)
595 // Call RISC code generator if we found a mnemonic
598 GenerateRISCCode(state);
603 // Invoke macro or complain about bad mnemonic
606 if ((sy = lookup(opname, MACRO, 0)) != NULL)
607 InvokeMacro(sy, siz);
609 errors("unknown op '%s'", opname);
614 // Call directive handlers
617 (*dirtab[state])(siz);
622 // o can't deposit instrs in BSS or ABS
623 // o do automatic .EVEN for instrs
624 // o allocate space for largest possible instr
625 // o can't do ".b" operations with an address register
628 error("cannot initialize non-storage (BSS) section");
632 if (sloc & 1) // Automatic .even
635 if (challoc - ch_size < 18) // Make sure have space in current chunk
638 m = &machtab[state - 1000];
640 // Call special-mode handler
641 if (m->mnattr & CGSPECIAL)
643 (*m->mnfunc)(m->mninst, siz);
647 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
653 amsk0 = amsktab[am0];
654 amsk1 = amsktab[am1];
656 // Catch attempts to use ".B" with an address register (yes, this check
657 // does work at this level)
658 if (siz == SIZB && (am0 == AREG || am1 == AREG))
660 error("cannot use '.b' with an address register");
666 if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
668 (*m->mnfunc)(m->mninst, siz);
672 m = &machtab[m->mncont];
678 // Handle the creation of labels
680 int HandleLabel(char * label, int labelType)
682 // Check for dot in front of label; means this is a local label if present
683 int environment = (*label == '.' ? curenv : 0);
684 SYM * symbol = lookup(label, LABEL, environment);
688 symbol = NewSymbol(label, LABEL, environment);
690 // symbol->sattre = RISCSYM;
693 else if (symbol->sattr & DEFINED)
694 return errors("multiply-defined label '%s'", label);
696 // Put symbol in "order of definition" list if it's not already in it
697 AddToSymbolDeclarationList(symbol);
701 symbol->svalue = orgaddr;
702 symbol->sattr |= ABS | DEFINED | EQUATED;
706 symbol->svalue = sloc;
707 symbol->sattr |= DEFINED | cursect;
712 if (0 == environment)
715 // Make label global if it has a double colon
716 if (labelType == DCOLON)
718 if (environment != 0)
719 return error(locgl_error);
721 symbol->sattr |= GLOBAL;
729 // .if, Start conditional assembly
739 if ((rif = f_ifent) == NULL)
740 rif = (IFENT *)malloc(sizeof(IFENT));
742 f_ifent = rif->if_prev;
744 rif->if_prev = ifent;
749 if (expr(exprbuf, &eval, &eattr, &esym) != OK)
752 if ((eattr & DEFINED) == 0)
753 return error(undef_error);
758 rif->if_state = (WORD)disabled;
764 // .else, Do alternate case for .if
770 if (rif->if_prev == NULL)
771 return error("mismatched .else");
774 disabled = rif->if_prev->if_state;
778 rif->if_state = (WORD)disabled;
784 // .endif, End of conditional assembly block
785 // This is also called by fpop() to pop levels of IFENTs in case a macro or
786 // include file exits early with `exitm' or `end'.
792 if (rif->if_prev == NULL)
793 return error("mismatched .endif");
795 ifent = rif->if_prev;
796 disabled = rif->if_prev->if_state;
797 rif->if_prev = f_ifent;