1 ////////////////////////////////////////////////////////////////////////////////////////////////////
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
20 #define DEF_KW // Declare keyword values
21 #include "kwtab.h" // Incl generated keyword tables & defs
23 #define DEF_MN // Incl 68k keyword definitions
24 #define DECL_MN // Incl 68k keyword state machine tables
31 IFENT *ifent; // Current ifent
32 static IFENT ifent0; // Root ifent
33 static IFENT *f_ifent; // Freelist of ifents
34 static int disabled; // Assembly conditionally disabled
35 int just_bss; // 1, ds.b in microprocessor mode
36 VALUE pcloc; // Value of "PC" at beginning of line
37 IFENT *ifent; // Current ifent
38 SYM *lab_sym; // Label on line (or NULL)
41 char extra_stuff[] = "extra (unexpected) text found after addressing mode";
42 char *comma_error = "missing comma";
43 char *syntax_error = "syntax error";
44 char *locgl_error = "cannot GLOBL local symbol";
45 char *lab_ignored = "label ignored";
47 // Table to convert an addressing-mode number to a bitmask.
48 LONG amsktab[0112] = {
49 M_DREG, M_DREG, M_DREG, M_DREG,
50 M_DREG, M_DREG, M_DREG, M_DREG,
52 M_AREG, M_AREG, M_AREG, M_AREG,
53 M_AREG, M_AREG, M_AREG, M_AREG,
55 M_AIND, M_AIND, M_AIND, M_AIND,
56 M_AIND, M_AIND, M_AIND, M_AIND,
58 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
59 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
61 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
62 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
64 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
65 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
67 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
68 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
91 // --- Initialize Line Processor -------------------------------------------------------------------
94 void init_procln(void) {
97 f_ifent = ifent0.if_prev = NULL;
102 // --- Line Processor ------------------------------------------------------------------------------
105 void assemble(void) {
106 int state; // Keyword machine state (output)
107 int j; // Random int, must be fast
108 char *p; // Random char ptr, must be fast
109 TOKEN *tk; // First token in line
110 char *label; // Symbol (or NULL)
111 char *equate; // Symbol (or NULL)
112 int labtyp = 0; // Label type (':', DCOLON)
113 int equtyp = 0; // Equ type ('=', DEQUALS)
114 VALUE eval; // Expression value
115 WORD eattr; // Expression attributes
116 SYM *esym; // External symbol involved in expr.
117 WORD siz = 0; // Size suffix to mnem/diretve/macro
118 LONG amsk0, amsk1; // Address-type masks for ea0, ea1
119 MNTAB *m; // Code generation table pointer
120 SYM *sy, *sy2; // Symbol (temp usage)
121 char *opname = NULL; // Name of dirctve/mnemonic/macro
122 int listflag; // 0: Don't call listeol()
123 int as68mode = 0; // 1: Handle multiple labels
124 WORD rmask; // Register list, for REG
125 int registerbank; // RISC register bank
126 int riscreg; // RISC register
128 listflag = 0; // Initialise listing flag
130 loop: // Line processing loop label
132 if(tokln() == TKEOF) { // Get another line of tokens
133 if(list_flag && listflag) // Flush last line of source
135 if(ifent->if_prev != NULL) // Check conditional token
136 error("hit EOF without finding matching .endif");
141 if(listflag && listing > 0) listeol(); // Tell listing generator about EOL
142 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
143 listflag = 1; // OK to call `listeol' now
144 just_bss = 0; // Reset just_bss mode
147 state = -3; // No keyword (just EOL)
148 label = NULL; // No label
149 lab_sym = NULL; // No (exported) label
150 equate = NULL; // No equate
151 tk = tok; // Save first token in line
152 pcloc = (VALUE)sloc; // Set beginning-of-line PC
154 loop1: // Internal line processing loop
156 if(*tok == EOL) // Restart loop if end-of-line
159 if(*tok != SYMBOL) { // First token MUST be a symbol
164 j = (int)tok[2]; // Skip equates (normal statements)
165 if(j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF) {
166 equate = (char *)tok[1];
172 if(j == ':' || j == DCOLON) { // Skip past label (but record it)
176 label = (char *)tok[1]; // Get label name
177 labtyp = tok[2]; // Get label type
178 tok += 3; // Go to next line token
180 // Handle multiple labels; if there's another label, go process it,
181 // and come back at `as68label' above.
184 if(*tok == SYMBOL && tok[2] == ':') {
191 if(*tok == EOL) // EOL is legal here...
194 if(*tok++ != SYMBOL) { // Next token MUST be a symbol
198 opname = p = (char *)*tok++; // Store opcode name here
200 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
201 // On output, `state' will have one of the values:
202 // -3 there was no symbol (EOL)
203 // -2..-1 the symbol didn't match any keyword
204 // 0..499 vanilla directives (dc, ds, etc.)
205 // 500..999 electric directives (macro, rept, etc.)
206 // 1000..+ mnemonics (move, lsr, etc.)
207 for(state = 0; state >= 0;) {
208 j = mnbase[state] + (int)tolowertab[*p];
209 if(mncheck[j] != state) { // Reject, character doesn't match
210 state = -1; // No match
213 if(!*++p) { // Must accept or reject at EOS
214 state = mnaccept[j]; // (-1 on no terminal match)
220 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
224 else if(*tok == DOTL)
226 else if(*tok == DOTB)
229 // Do special directives (500..999) (These must be handled in "real time")
230 if(state >= 500 && state < 1000)
241 case MN_IIF: // .iif --- immediate if
242 if(disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
244 if(!(eattr & DEFINED)) {
255 case MN_MACRO: // .macro --- macro definition
262 case MN_EXITM: // .exitm --- exit macro
263 case MN_ENDM: // .endm --- same as .exitm
279 error("mis-nested .endr");
285 if(disabled) // Conditionally disabled code
290 j = 0; // Pick global or local sym enviroment
294 sy = lookup(equate, LABEL, j);
296 sy = newsym(equate, LABEL, j);
298 if(equtyp == DEQUALS) {
299 if(j) { // Can't GLOBAL a local symbol
305 } else if((sy->sattr & DEFINED) && equtyp != SET) {
306 if((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR)) {
307 sy->sattre |= ~UNDEF_EQUR;
309 } else if((equtyp == CCDEF) && (sy->sattre & UNDEF_CC)) {
310 sy->sattre |= ~UNDEF_CC;
313 errors("multiple equate to '%s'", sy->sname);
318 // Put symbol in "order of definition" list
319 if(!(sy->sattr & SDECLLIST)) sym_decl(sy);
321 // Parse value to equate symbol to;
325 if(equtyp == EQUREG) {
326 if(!rgpu && !rdsp) { // Check that we are in a RISC section
327 error(".equr/.regequ must be defined in .gpu/.dsp section");
330 if((*tok >= KW_R0) && (*tok <= KW_R31)) { // Check for register to equate to
331 sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
332 riscreg = (*tok - KW_R0);
333 sy->sattre |= (riscreg << 8); // Store register number
334 if((tok[1] == ',') && (tok[2] == CONST)) {
336 if(*tok == 0) registerbank = BANK_0;
337 else if(*tok == 1) registerbank = BANK_1;
338 else registerbank = BANK_N;
340 registerbank = BANK_N;
342 sy->sattre |= regbank; // Store register bank
343 eattr = ABS | DEFINED | GLOBAL;
344 eval = 0x80000080 + (riscreg) + (registerbank << 8);
346 } else if(tok[0] == SYMBOL) { // Checking for a register symbol
347 sy2 = lookup((char *)tok[1], LABEL, j);
348 if(!sy2 || !(sy2->sattre & EQUATEDREG)) { // Make sure symbol is a valid equreg
349 error("invalid GPU/DSP .equr/.regequ definition");
352 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
353 sy->sattre = sy2->sattre;
354 eval = (sy2->svalue & 0xFFFFF0FF);
358 error("invalid GPU/DSP .equr/.regequ definition");
361 } else if(equtyp == REG) {
362 if(reglist(&rmask) < 0)
365 eattr = ABS | DEFINED;
366 } else if(equtyp == CCDEF) {
367 sy->sattre |= EQUATEDCC;
368 eattr = ABS | DEFINED | GLOBAL;
369 if(tok[0] == SYMBOL) {
370 sy2 = lookup((char *)tok[1], LABEL, j);
371 if(!sy2 || !(sy2->sattre & EQUATEDCC)) {
372 error("invalid gpu/dsp .ccdef definition");
375 eattr = ABS | DEFINED | GLOBAL;
376 sy->sattre = sy2->sattre;
381 if(expr(exprbuf, &eval, &eattr, &esym) != OK)
383 } else if(*tok == SYMBOL) { //equ a equr
384 sy2 = lookup((char *)tok[1], LABEL, j);
385 if(sy2 && (sy2->sattre & EQUATEDREG)) {
386 sy->stype = sy2->stype;
387 sy->sattr = sy2->sattr;
388 sy->sattre = sy2->sattre;
389 sy->svalue = (sy2->svalue & 0xFFFFF0FF);
392 if(expr(exprbuf, &eval, &eattr, &esym) != OK)
395 if(expr(exprbuf, &eval, &eattr, &esym) != OK)
398 if(!(eattr & DEFINED)) {
404 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
406 if(list_flag) // Put value in listing
409 at_eol(); // Must be at EOL now
421 sy = lookup(label, LABEL, j);
424 sy = newsym(label, LABEL, j);
426 sy->sattre = RISCSYM;
427 } else if(sy->sattr & DEFINED) {
428 errors("multiply-defined label '%s'", label);
432 // Put symbol in "order of definition" list
433 if(!(sy->sattr & SDECLLIST)) sym_decl(sy);
436 sy->svalue = orgaddr;
437 sy->sattr |= ABS | DEFINED | EQUATED;
440 sy->sattr |= DEFINED | cursect;
447 if(labtyp == DCOLON) { // Make label global
455 // If we're in as68 mode, and there's another label, go back and handle it
456 if(as68_flag && as68mode)
464 // If we are in GPU or DSP mode and still in need of a mnemonic then search for one
465 if((rgpu || rdsp) && (state < 0 || state >= 1000)) {
466 for(state = 0, p = opname; state >= 0;) {
467 j = mrbase[state] + (int)tolowertab[*p];
468 if(mrcheck[j] != state) { // Reject, character doesn't match
469 state = -1; // No match
473 if(!*++p) { // Must accept or reject at EOS
474 state = mraccept[j]; // (-1 on no terminal match)
480 // Call RISC code generator if we found a mnemonic
487 // Invoke macro or complain about bad mnemonic
489 if((sy = lookup(opname, MACRO, 0)) != NULL)
491 else errors("unknown op '%s'", opname);
495 // Call directive handlers
497 (*dirtab[state])(siz);
502 // o can't deposit instrs in BSS or ABS
503 // o do automatic .EVEN for instrs
504 // o allocate space for largest possible instr
505 // o can't do ".b" operations with an address register
507 error("cannot initialize non-storage (BSS) section");
511 if(sloc & 1) // Automatic .even
514 if(challoc - ch_size < 18) // Make sure have space in current chunk
517 m = &machtab[state - 1000];
518 if(m->mnattr & CGSPECIAL) { // Call special-mode handler
519 (*m->mnfunc)(m->mninst, siz);
523 if(amode(1) < 0) // Parse 0, 1 or 2 addr modes
529 amsk0 = amsktab[am0];
530 amsk1 = amsktab[am1];
532 // Catch attempts to use ".B" with an address register (yes, this check does work at this level)
533 if(siz == SIZB && (am0 == AREG || am1 == AREG)) {
534 error("cannot use '.b' with an address register");
539 if((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0) {
540 (*m->mnfunc)(m->mninst, siz);
543 m = &machtab[m->mncont];
548 // --- .if, Start Conditional Assembly -------------------------------------------------------------
558 if((rif = f_ifent) == NULL) rif = (IFENT *)amem((LONG)sizeof(IFENT));
559 else f_ifent = rif->if_prev;
561 rif->if_prev = ifent;
565 if(expr(exprbuf, &eval, &eattr, &esym) != OK) return(0);
566 if((eattr & DEFINED) == 0) return(error(undef_error));
569 rif->if_state = (WORD)disabled;
574 // --- .else, Do Alternate Case For .if ------------------------------------------------------------
582 if(rif->if_prev == NULL) return(error("mismatched .else"));
584 if(disabled) disabled = rif->if_prev->if_state;
587 rif->if_state = (WORD)disabled;
592 // -------------------------------------------------------------------------------------------------
593 // .endif, End of conditional assembly block
594 // This is also called by fpop() to pop levels of IFENTs in case a macro or include file exits
595 // early with `exitm' or `end'.
596 // -------------------------------------------------------------------------------------------------
603 if(rif->if_prev == NULL) return(error("mismatched .endif"));
605 ifent = rif->if_prev;
606 disabled = rif->if_prev->if_state;
607 rif->if_prev = f_ifent;