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
32 IFENT * ifent; // Current ifent
33 static IFENT ifent0; // Root ifent
34 static IFENT * f_ifent; // Freelist of ifents
35 static int disabled; // Assembly conditionally disabled
36 int just_bss; // 1, ds.b in microprocessor mode
37 VALUE pcloc; // Value of "PC" at beginning of line
38 IFENT * ifent; // Current ifent
39 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 if (tokln() == TKEOF)
136 { // Get another line of tokens
137 if (list_flag && listflag) // Flush last line of source
140 if (ifent->if_prev != NULL) // Check conditional token
141 error("hit EOF without finding matching .endif");
148 if (listflag && listing > 0)
149 listeol(); // Tell listing generator about EOL
151 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
152 listflag = 1; // OK to call `listeol' now
153 just_bss = 0; // Reset just_bss mode
156 state = -3; // No keyword (just EOL)
157 label = NULL; // No label
158 lab_sym = NULL; // No (exported) label
159 equate = NULL; // No equate
160 tk = tok; // Save first token in line
161 pcloc = (VALUE)sloc; // Set beginning-of-line PC
163 loop1: // Internal line processing loop
165 if (*tok == EOL) // Restart loop if end-of-line
169 { // First token MUST be a symbol
174 j = (int)tok[2]; // Skip equates (normal statements)
176 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
178 equate = (char *)tok[1];
184 if (j == ':' || j == DCOLON)
185 { // Skip past label (but record it)
187 label = (char *)tok[1]; // Get label name
188 labtyp = tok[2]; // Get label type
189 tok += 3; // Go to next line token
191 // Handle multiple labels; if there's another label, go process it,
192 // and come back at `as68label' above.
197 if (*tok == SYMBOL && tok[2] == ':')
205 if (*tok == EOL) // EOL is legal here...
208 if (*tok++ != SYMBOL)
209 { // Next token MUST be a symbol
214 opname = p = (char *)*tok++; // Store opcode name here
216 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
217 // On output, `state' will have one of the values:
218 // -3 there was no symbol (EOL)
219 // -2..-1 the symbol didn't match any keyword
220 // 0..499 vanilla directives (dc, ds, etc.)
221 // 500..999 electric directives (macro, rept, etc.)
222 // 1000..+ mnemonics (move, lsr, etc.)
223 for(state=0; state>=0;)
225 j = mnbase[state] + (int)tolowertab[*p];
227 if (mncheck[j] != state)
228 { // Reject, character doesn't match
229 state = -1; // No match
234 { // Must accept or reject at EOS
235 state = mnaccept[j]; // (-1 on no terminal match)
242 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
247 else if (*tok == DOTL)
249 else if (*tok == DOTB)
252 // Do special directives (500..999) (These must be handled in "real time")
253 if (state >= 500 && state < 1000)
266 case MN_IIF: // .iif --- immediate if
267 if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
270 if (!(eattr & DEFINED))
286 case MN_MACRO: // .macro --- macro definition
296 case MN_EXITM: // .exitm --- exit macro
297 case MN_ENDM: // .endm --- same as .exitm
319 error("mis-nested .endr");
326 if (disabled) // Conditionally disabled code
332 j = 0; // Pick global or local sym enviroment
337 sy = lookup(equate, LABEL, j);
341 sy = newsym(equate, LABEL, j);
344 if (equtyp == DEQUALS)
347 { // Can't GLOBAL a local symbol
355 else if ((sy->sattr & DEFINED) && equtyp != SET)
357 if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
359 sy->sattre |= ~UNDEF_EQUR;
362 else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
364 sy->sattre |= ~UNDEF_CC;
369 errors("multiple equate to '%s'", sy->sname);
374 // Put symbol in "order of definition" list
375 if (!(sy->sattr & SDECLLIST))
378 // Parse value to equate symbol to;
382 if (equtyp == EQUREG)
385 { // Check that we are in a RISC section
386 error(".equr/.regequ must be defined in .gpu/.dsp section");
390 if ((*tok >= KW_R0) && (*tok <= KW_R31))
391 { // Check for register to equate to
392 sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
393 riscreg = (*tok - KW_R0);
394 sy->sattre |= (riscreg << 8); // Store register number
396 if ((tok[1] == ',') && (tok[2] == CONST))
401 registerbank = BANK_0;
403 registerbank = BANK_1;
405 registerbank = BANK_N;
409 registerbank = BANK_N;
412 sy->sattre |= regbank; // Store register bank
413 eattr = ABS | DEFINED | GLOBAL;
414 eval = 0x80000080 + (riscreg) + (registerbank << 8);
417 else if (tok[0] == SYMBOL)
418 { // Checking for a register symbol
419 sy2 = lookup((char *)tok[1], LABEL, j);
421 if (!sy2 || !(sy2->sattre & EQUATEDREG))
422 { // Make sure symbol is a valid equreg
423 error("invalid GPU/DSP .equr/.regequ definition");
428 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
429 sy->sattre = sy2->sattre;
430 eval = (sy2->svalue & 0xFFFFF0FF);
436 error("invalid GPU/DSP .equr/.regequ definition");
440 else if (equtyp == REG)
442 if (reglist(&rmask) < 0)
446 eattr = ABS | DEFINED;
448 else if (equtyp == CCDEF)
450 sy->sattre |= EQUATEDCC;
451 eattr = ABS | DEFINED | GLOBAL;
453 if (tok[0] == SYMBOL)
455 sy2 = lookup((char *)tok[1], LABEL, j);
457 if (!sy2 || !(sy2->sattre & EQUATEDCC))
459 error("invalid gpu/dsp .ccdef definition");
464 eattr = ABS | DEFINED | GLOBAL;
465 sy->sattre = sy2->sattre;
470 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
473 else if (*tok == SYMBOL)
475 sy2 = lookup((char *)tok[1], LABEL, j);
477 if (sy2 && (sy2->sattre & EQUATEDREG))
479 sy->stype = sy2->stype;
480 sy->sattr = sy2->sattr;
481 sy->sattre = sy2->sattre;
482 sy->svalue = (sy2->svalue & 0xFFFFF0FF);
485 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
488 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
491 if (!(eattr & DEFINED))
498 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
500 if (list_flag) // Put value in listing
503 at_eol(); // Must be at EOL now
516 sy = lookup(label, LABEL, j);
520 sy = newsym(label, LABEL, j);
522 sy->sattre = RISCSYM;
524 else if (sy->sattr & DEFINED)
526 errors("multiply-defined label '%s'", label);
530 // Put symbol in "order of definition" list
531 if (!(sy->sattr & SDECLLIST))
536 sy->svalue = orgaddr;
537 sy->sattr |= ABS | DEFINED | EQUATED;
542 sy->sattr |= DEFINED | cursect;
550 if (labtyp == DCOLON)
551 { // Make label global
561 // If we're in as68 mode, and there's another label, go back and handle it
562 if (as68_flag && as68mode)
570 // If we are in GPU or DSP mode and still in need of a mnemonic then search for one
571 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
573 for(state=0, p=opname; state>=0;)
575 j = mrbase[state] + (int)tolowertab[*p];
577 if (mrcheck[j] != state)
578 { // Reject, character doesn't match
579 state = -1; // No match
584 { // Must accept or reject at EOS
585 state = mraccept[j]; // (-1 on no terminal match)
592 // Call RISC code generator if we found a mnemonic
600 // Invoke macro or complain about bad mnemonic
603 if ((sy = lookup(opname, MACRO, 0)) != NULL)
606 errors("unknown op '%s'", opname);
611 // Call directive handlers
614 (*dirtab[state])(siz);
619 // o can't deposit instrs in BSS or ABS
620 // o do automatic .EVEN for instrs
621 // o allocate space for largest possible instr
622 // o can't do ".b" operations with an address register
625 error("cannot initialize non-storage (BSS) section");
629 if (sloc & 1) // Automatic .even
632 if (challoc - ch_size < 18) // Make sure have space in current chunk
635 m = &machtab[state - 1000];
637 if (m->mnattr & CGSPECIAL)
638 { // Call special-mode handler
639 (*m->mnfunc)(m->mninst, siz);
643 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
649 amsk0 = amsktab[am0];
650 amsk1 = amsktab[am1];
652 // Catch attempts to use ".B" with an address register (yes, this check does work at this level)
653 if (siz == SIZB && (am0 == AREG || am1 == AREG))
655 error("cannot use '.b' with an address register");
661 if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
663 (*m->mnfunc)(m->mninst, siz);
667 m = &machtab[m->mncont];
673 // .if, Start Conditional Assembly
683 if ((rif = f_ifent) == NULL)
684 rif = (IFENT *)amem((LONG)sizeof(IFENT));
686 f_ifent = rif->if_prev;
688 rif->if_prev = ifent;
693 if (expr(exprbuf, &eval, &eattr, &esym) != OK) return 0;
695 if ((eattr & DEFINED) == 0)
696 return error(undef_error);
701 rif->if_state = (WORD)disabled;
707 // .else, Do Alternate Case For .if
713 if (rif->if_prev == NULL)
714 return error("mismatched .else");
717 disabled = rif->if_prev->if_state;
721 rif->if_state = (WORD)disabled;
727 // .endif, End of conditional assembly block
728 // This is also called by fpop() to pop levels of IFENTs in case a macro or
729 // include file exits early with `exitm' or `end'.
735 if (rif->if_prev == NULL)
736 return error("mismatched .endif");
738 ifent = rif->if_prev;
739 disabled = rif->if_prev->if_state;
740 rif->if_prev = f_ifent;