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,
93 // Initialize Line Processor
95 void InitLineProcessor(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
130 listflag = 0; // Initialise listing flag
132 loop: // Line processing loop label
134 // Get another line of tokens
135 if (TokenizeLine() == TKEOF)
137 if (verb_flag) printf("Assemble: Found TKEOF flag...\n");
138 if (list_flag && listflag) // Flush last line of source
141 if (ifent->if_prev != NULL) // Check conditional token
142 error("hit EOF without finding matching .endif");
147 DEBUG DumpTokenBuffer();
151 if (listflag && listing > 0)
152 listeol(); // Tell listing generator about EOL
154 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
155 listflag = 1; // OK to call `listeol' now
156 just_bss = 0; // Reset just_bss mode
159 state = -3; // No keyword (just EOL)
160 label = NULL; // No label
161 lab_sym = NULL; // No (exported) label
162 equate = NULL; // No equate
163 tk = tok; // Save first token in line
164 pcloc = (VALUE)sloc; // Set beginning-of-line PC
166 loop1: // Internal line processing loop
168 if (*tok == EOL) // Restart loop if end-of-line
171 // First token MUST be a symbol
178 j = (int)tok[2]; // Skip equates (normal statements)
180 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
182 equate = string[tok[1]];
188 // Skip past label (but record it)
189 if (j == ':' || j == DCOLON)
192 // label = (char *)tok[1]; // Get label name
193 label = string[tok[1]]; // Get label name
194 labtyp = tok[2]; // Get label type
195 tok += 3; // Go to next line token
197 // Handle multiple labels; if there's another label, go process it,
198 // and come back at `as68label' above.
203 if (*tok == SYMBOL && tok[2] == ':')
211 // 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 //i'm thinking, no. Let's test that out! :-D
430 // sy->sattre |= (riscreg << 8); // Store register number
431 //everything seems to build fine without it... We'll leave it here Just In Case(tm)
433 #define DEBODGE_REGBANK
434 #ifdef DEBODGE_REGBANK
435 // Default is current state of "regbank"
436 registerbank = regbank;
438 // Default is no register bank specified
439 registerbank = BANK_N;
442 // Check for ",<bank #>" override notation
443 if ((tok[1] == ',') && (tok[2] == CONST))
445 // Advance token pointer to the constant
448 // Anything other than a 0 or a 1 will result in "No Bank"
450 registerbank = BANK_0;
452 registerbank = BANK_1;
455 #ifdef DEBODGE_REGBANK
456 sy->sattre |= registerbank; // Store register bank
458 // What needs to happen here is to prime registerbank with regbank, then use
459 // registerbank down below for the bank marking.
460 #warning "!!! regbank <-> registerbank confusion here !!!"
461 // The question here is why, if we're allowed to override the ".regbankN" rules above,
462 // then why is it using the one set by the directive in the extended attributes and
463 // not in what ends up in symbol->svalue?
464 // ".regbankN" is not an original Madmac directive, so it's suspect
465 sy->sattre |= regbank; // Store register bank
467 eattr = ABS | DEFINED | GLOBAL;
468 // & what does this $80000080 constant mean???
469 // eval = 0x80000080 + (riscreg) + (registerbank << 8);
473 // Checking for a register symbol
474 else if (tok[0] == SYMBOL)
476 sy2 = lookup(string[tok[1]], LABEL, j);
478 // Make sure symbol is a valid equreg
479 if (!sy2 || !(sy2->sattre & EQUATEDREG))
481 error("invalid GPU/DSP .equr/.regequ definition");
486 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
487 sy->sattre = sy2->sattre;
488 eval = (sy2->svalue & 0xFFFFF0FF);
494 error("invalid GPU/DSP .equr/.regequ definition");
498 else if (equtyp == REG)
500 if (reglist(&rmask) < 0)
504 eattr = ABS | DEFINED;
506 else if (equtyp == CCDEF)
508 sy->sattre |= EQUATEDCC;
509 eattr = ABS | DEFINED | GLOBAL;
511 if (tok[0] == SYMBOL)
513 sy2 = lookup(string[tok[1]], LABEL, j);
515 if (!sy2 || !(sy2->sattre & EQUATEDCC))
517 error("invalid gpu/dsp .ccdef definition");
522 eattr = ABS | DEFINED | GLOBAL;
523 sy->sattre = sy2->sattre;
528 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
532 else if (*tok == SYMBOL)
534 sy2 = lookup(string[tok[1]], LABEL, j);
536 if (sy2 && (sy2->sattre & EQUATEDREG))
538 sy->stype = sy2->stype;
539 sy->sattr = sy2->sattr;
540 sy->sattre = sy2->sattre;
541 //ICK sy->svalue = (sy2->svalue & 0xFFFFF0FF);
542 sy->svalue = sy2->svalue;
545 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
548 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
551 if (!(eattr & DEFINED))
557 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
560 if (list_flag) // Put value in listing
563 at_eol(); // Must be at EOL now
571 // Check for dot in front of label; means this is a local label if present
572 j = (*label == '.' ? curenv : 0);
573 sy = lookup(label, LABEL, j);
577 sy = NewSymbol(label, LABEL, j);
579 sy->sattre = RISCSYM;
581 else if (sy->sattr & DEFINED)
583 errors("multiply-defined label '%s'", label);
587 // Put symbol in "order of definition" list
588 if (!(sy->sattr & SDECLLIST))
593 sy->svalue = orgaddr;
594 sy->sattr |= ABS | DEFINED | EQUATED;
599 sy->sattr |= DEFINED | cursect;
608 if (labtyp == DCOLON)
619 // If we're in as68 mode, and there's another label, go back and handle it
620 if (as68_flag && as68mode)
628 // If we are in GPU or DSP mode and still in need of a mnemonic then search
630 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
632 for(state=0, p=opname; state>=0;)
634 j = mrbase[state] + (int)tolowertab[*p];
636 // Reject, character doesn't match
637 if (mrcheck[j] != state)
639 state = -1; // No match
643 // Must accept or reject at EOS
646 state = mraccept[j]; // (-1 on no terminal match)
653 // Call RISC code generator if we found a mnemonic
656 GenerateRISCCode(state);
661 // Invoke macro or complain about bad mnemonic
664 if ((sy = lookup(opname, MACRO, 0)) != NULL)
665 InvokeMacro(sy, siz);
667 errors("unknown op '%s'", opname);
672 // Call directive handlers
675 (*dirtab[state])(siz);
680 // o can't deposit instrs in BSS or ABS
681 // o do automatic .EVEN for instrs
682 // o allocate space for largest possible instr
683 // o can't do ".b" operations with an address register
686 error("cannot initialize non-storage (BSS) section");
690 if (sloc & 1) // Automatic .even
693 if (challoc - ch_size < 18) // Make sure have space in current chunk
696 m = &machtab[state - 1000];
698 // Call special-mode handler
699 if (m->mnattr & CGSPECIAL)
701 (*m->mnfunc)(m->mninst, siz);
705 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
711 amsk0 = amsktab[am0];
712 amsk1 = amsktab[am1];
714 // Catch attempts to use ".B" with an address register (yes, this check
715 // does work at this level)
716 if (siz == SIZB && (am0 == AREG || am1 == AREG))
718 error("cannot use '.b' with an address register");
724 if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
726 (*m->mnfunc)(m->mninst, siz);
730 m = &machtab[m->mncont];
736 // .if, Start Conditional Assembly
746 if ((rif = f_ifent) == NULL)
747 rif = (IFENT *)malloc(sizeof(IFENT));
749 f_ifent = rif->if_prev;
751 rif->if_prev = ifent;
756 if (expr(exprbuf, &eval, &eattr, &esym) != OK)
759 if ((eattr & DEFINED) == 0)
760 return error(undef_error);
765 rif->if_state = (WORD)disabled;
771 // .else, Do Alternate Case For .if
777 if (rif->if_prev == NULL)
778 return error("mismatched .else");
781 disabled = rif->if_prev->if_state;
785 rif->if_state = (WORD)disabled;
791 // .endif, End of conditional assembly block
792 // This is also called by fpop() to pop levels of IFENTs in case a macro or
793 // include file exits early with `exitm' or `end'.
799 if (rif->if_prev == NULL)
800 return error("mismatched .endif");
802 ifent = rif->if_prev;
803 disabled = rif->if_prev->if_state;
804 rif->if_prev = f_ifent;