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 char extra_stuff[] = "extra (unexpected) text found after addressing mode";
43 char * comma_error = "missing comma";
44 char * syntax_error = "syntax error";
45 char * locgl_error = "cannot GLOBL local symbol";
46 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,
93 // Initialize Line Processor
95 void init_procln(void)
99 f_ifent = ifent0.if_prev = NULL;
109 int state; // Keyword machine state (output)
110 int j; // Random int, must be fast
111 char * p; // Random char ptr, must be fast
112 TOKEN * tk; // First token in line
113 char * label; // Symbol (or NULL)
114 char * equate; // Symbol (or NULL)
115 int labtyp = 0; // Label type (':', DCOLON)
116 int equtyp = 0; // Equ type ('=', DEQUALS)
117 VALUE eval; // Expression value
118 WORD eattr; // Expression attributes
119 SYM * esym; // External symbol involved in expr.
120 WORD siz = 0; // Size suffix to mnem/diretve/macro
121 LONG amsk0, amsk1; // Address-type masks for ea0, ea1
122 MNTAB * m; // Code generation table pointer
123 SYM * sy, * sy2; // Symbol (temp usage)
124 char * opname = NULL; // Name of dirctve/mnemonic/macro
125 int listflag; // 0: Don't call listeol()
126 int as68mode = 0; // 1: Handle multiple labels
127 WORD rmask; // Register list, for REG
128 int registerbank; // RISC register bank
129 int riscreg; // RISC register
131 listflag = 0; // Initialise listing flag
133 loop: // Line processing loop label
135 // Get another line of tokens
136 if (tokln() == TKEOF)
138 if (verb_flag) printf("Assemble: Found TKEOF flag...\n");
139 if (list_flag && listflag) // Flush last line of source
142 if (ifent->if_prev != NULL) // Check conditional token
143 error("hit EOF without finding matching .endif");
148 DEBUG DumpTokenBuffer();
152 if (listflag && listing > 0)
153 listeol(); // Tell listing generator about EOL
155 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
156 listflag = 1; // OK to call `listeol' now
157 just_bss = 0; // Reset just_bss mode
160 state = -3; // No keyword (just EOL)
161 label = NULL; // No label
162 lab_sym = NULL; // No (exported) label
163 equate = NULL; // No equate
164 tk = tok; // Save first token in line
165 pcloc = (VALUE)sloc; // Set beginning-of-line PC
167 loop1: // Internal line processing loop
169 if (*tok == EOL) // Restart loop if end-of-line
172 // First token MUST be a symbol
179 j = (int)tok[2]; // Skip equates (normal statements)
181 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
183 equate = string[tok[1]];
189 // Skip past label (but record it)
190 if (j == ':' || j == DCOLON)
193 // label = (char *)tok[1]; // Get label name
194 label = string[tok[1]]; // Get label name
195 labtyp = tok[2]; // Get label type
196 tok += 3; // Go to next line token
198 // Handle multiple labels; if there's another label, go process it,
199 // and come back at `as68label' above.
204 if (*tok == SYMBOL && tok[2] == ':')
212 if (*tok == EOL) // EOL is legal here...
215 // Next token MUST be a symbol
216 if (*tok++ != SYMBOL)
222 // This is the problem here: On 64-bit platforms, this cuts the native pointer
223 // in half. We need to figure out how to fix this.
224 //#warning "!!! Bad pointer !!!"
226 opname = p = (char *)*tok++; // Store opcode name here
228 opname = p = string[*tok++];
231 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
232 // On output, `state' will have one of the values:
233 // -3 there was no symbol (EOL)
234 // -2..-1 the symbol didn't match any keyword
235 // 0..499 vanilla directives (dc, ds, etc.)
236 // 500..999 electric directives (macro, rept, etc.)
237 // 1000..+ mnemonics (move, lsr, etc.)
238 for(state=0; state>=0;)
240 j = mnbase[state] + (int)tolowertab[*p];
242 // Reject, character doesn't match
243 if (mncheck[j] != state)
245 state = -1; // No match
249 // Must accept or reject at EOS
252 state = mnaccept[j]; // (-1 on no terminal match)
259 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
264 else if (*tok == DOTL)
266 else if (*tok == DOTB)
269 // Do special directives (500..999) (These must be handled in "real time")
270 if (state >= 500 && state < 1000)
283 case MN_IIF: // .iif --- immediate if
284 if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
287 if (!(eattr & DEFINED))
303 case MN_MACRO: // .macro --- macro definition
313 case MN_EXITM: // .exitm --- exit macro
314 case MN_ENDM: // .endm --- same as .exitm
336 error("mis-nested .endr");
343 if (disabled) // Conditionally disabled code
349 // Pick global or local symbol enviroment
356 j = (*equate == '.' ? curenv : 0);
358 sy = lookup(equate, LABEL, j);
362 sy = NewSymbol(equate, LABEL, j);
365 if (equtyp == DEQUALS)
367 // Can't GLOBAL a local symbol
377 else if ((sy->sattr & DEFINED) && equtyp != SET)
379 if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
381 //REALLY? sy->sattre |= ~UNDEF_EQUR;
382 sy->sattre &= ~UNDEF_EQUR;
385 else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
387 //REALLY? sy->sattre |= ~UNDEF_CC;
388 sy->sattre &= ~UNDEF_CC;
393 errors("multiple equate to '%s'", sy->sname);
398 // Put symbol in "order of definition" list
399 if (!(sy->sattr & SDECLLIST))
402 // Parse value to equate symbol to;
406 if (equtyp == EQUREG)
408 //Linko's request to issue a warning on labels that equated to the same register
409 //would go here. Not sure how to implement it though. :-/
412 have an array of bools with 64 entries. Whenever a register is equated, set the
413 corresponding register bool to true. Whenever it's undef'ed, set it to false. When
414 checking to see if it's already been equated, issue a warning.
416 // Check that we are in a RISC section
419 error(".equr/.regequ must be defined in .gpu/.dsp section");
423 // Check for register to equate to
424 if ((*tok >= KW_R0) && (*tok <= KW_R31))
426 sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
427 riscreg = (*tok - KW_R0);
428 //is there any reason to do this, since we're putting this in svalue?
429 sy->sattre |= (riscreg << 8); // Store register number
431 // Default is no register bank specified
432 registerbank = BANK_N;
434 // Check for ",<bank #>" notation
435 if ((tok[1] == ',') && (tok[2] == CONST))
437 // Advance token pointer to the constant
440 // Anything other than a 0 or a 1 will result in "No Bank"
442 registerbank = BANK_0;
444 registerbank = BANK_1;
447 // What needs to happen here is to prime registerbank with regbank, then use
448 // registerbank down below for the bank marking.
449 #warning "!!! regbank <-> registerbank confusion here !!!"
450 // The question here is why, if we're allowed to override the ".regbankN" rules above,
451 // then why is it using the one set by the directive in the extended attributes and
452 // not in what ends up in symbol->svalue?
453 // ".regbankN" is not an original Madmac directive, so it's suspect
454 sy->sattre |= regbank; // Store register bank
455 eattr = ABS | DEFINED | GLOBAL;
456 // & what does this $80000080 constant mean???
457 // eval = 0x80000080 + (riscreg) + (registerbank << 8);
461 // Checking for a register symbol
462 else if (tok[0] == SYMBOL)
464 sy2 = lookup(string[tok[1]], LABEL, j);
466 // Make sure symbol is a valid equreg
467 if (!sy2 || !(sy2->sattre & EQUATEDREG))
469 error("invalid GPU/DSP .equr/.regequ definition");
474 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
475 sy->sattre = sy2->sattre;
476 eval = (sy2->svalue & 0xFFFFF0FF);
482 error("invalid GPU/DSP .equr/.regequ definition");
486 else if (equtyp == REG)
488 if (reglist(&rmask) < 0)
492 eattr = ABS | DEFINED;
494 else if (equtyp == CCDEF)
496 sy->sattre |= EQUATEDCC;
497 eattr = ABS | DEFINED | GLOBAL;
499 if (tok[0] == SYMBOL)
501 sy2 = lookup(string[tok[1]], LABEL, j);
503 if (!sy2 || !(sy2->sattre & EQUATEDCC))
505 error("invalid gpu/dsp .ccdef definition");
510 eattr = ABS | DEFINED | GLOBAL;
511 sy->sattre = sy2->sattre;
516 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
520 else if (*tok == SYMBOL)
522 sy2 = lookup(string[tok[1]], LABEL, j);
524 if (sy2 && (sy2->sattre & EQUATEDREG))
526 sy->stype = sy2->stype;
527 sy->sattr = sy2->sattr;
528 sy->sattre = sy2->sattre;
529 sy->svalue = (sy2->svalue & 0xFFFFF0FF);
532 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
535 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
538 if (!(eattr & DEFINED))
544 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
547 if (list_flag) // Put value in listing
550 at_eol(); // Must be at EOL now
558 // Check for dot in front of label; means this is a local label if present
565 j = (*label == '.' ? curenv : 0);
568 sy = lookup(label, LABEL, j);
572 sy = NewSymbol(label, LABEL, j);
574 sy->sattre = RISCSYM;
576 else if (sy->sattr & DEFINED)
578 errors("multiply-defined label '%s'", label);
582 // Put symbol in "order of definition" list
583 if (!(sy->sattr & SDECLLIST))
588 sy->svalue = orgaddr;
589 sy->sattr |= ABS | DEFINED | EQUATED;
594 sy->sattr |= DEFINED | cursect;
603 if (labtyp == DCOLON)
614 // If we're in as68 mode, and there's another label, go back and handle it
615 if (as68_flag && as68mode)
623 // If we are in GPU or DSP mode and still in need of a mnemonic then search
625 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
627 for(state=0, p=opname; state>=0;)
629 j = mrbase[state] + (int)tolowertab[*p];
631 // Reject, character doesn't match
632 if (mrcheck[j] != state)
634 state = -1; // No match
638 // Must accept or reject at EOS
641 state = mraccept[j]; // (-1 on no terminal match)
648 // Call RISC code generator if we found a mnemonic
651 GenerateRISCCode(state);
656 // Invoke macro or complain about bad mnemonic
659 if ((sy = lookup(opname, MACRO, 0)) != NULL)
660 InvokeMacro(sy, siz);
662 errors("unknown op '%s'", opname);
667 // Call directive handlers
670 (*dirtab[state])(siz);
675 // o can't deposit instrs in BSS or ABS
676 // o do automatic .EVEN for instrs
677 // o allocate space for largest possible instr
678 // o can't do ".b" operations with an address register
681 error("cannot initialize non-storage (BSS) section");
685 if (sloc & 1) // Automatic .even
688 if (challoc - ch_size < 18) // Make sure have space in current chunk
691 m = &machtab[state - 1000];
693 // Call special-mode handler
694 if (m->mnattr & CGSPECIAL)
696 (*m->mnfunc)(m->mninst, siz);
700 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
706 amsk0 = amsktab[am0];
707 amsk1 = amsktab[am1];
709 // Catch attempts to use ".B" with an address register (yes, this check
710 // does work at this level)
711 if (siz == SIZB && (am0 == AREG || am1 == AREG))
713 error("cannot use '.b' with an address register");
719 if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
721 (*m->mnfunc)(m->mninst, siz);
725 m = &machtab[m->mncont];
731 // .if, Start Conditional Assembly
741 if ((rif = f_ifent) == NULL)
742 rif = (IFENT *)malloc(sizeof(IFENT));
744 f_ifent = rif->if_prev;
746 rif->if_prev = ifent;
751 if (expr(exprbuf, &eval, &eattr, &esym) != OK)
754 if ((eattr & DEFINED) == 0)
755 return error(undef_error);
760 rif->if_state = (WORD)disabled;
766 // .else, Do Alternate Case For .if
772 if (rif->if_prev == NULL)
773 return error("mismatched .else");
776 disabled = rif->if_prev->if_state;
780 rif->if_state = (WORD)disabled;
786 // .endif, End of conditional assembly block
787 // This is also called by fpop() to pop levels of IFENTs in case a macro or
788 // include file exits early with `exitm' or `end'.
794 if (rif->if_prev == NULL)
795 return error("mismatched .endif");
797 ifent = rif->if_prev;
798 disabled = rif->if_prev->if_state;
799 rif->if_prev = f_ifent;