2 // RMAC - Renamed Macro Assembler for all Atari computers
3 // PROCLN.C - Line Processing
4 // Copyright (C) 199x Landon Dyer, 2011-2022 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
13 #include "dsp56k_amode.h"
14 #include "dsp56k_mach.h"
25 #define DEF_KW // Declare keyword values
26 #include "kwtab.h" // Incl generated keyword tables & defs
28 #define DEF_MN // Incl 68k keyword definitions
29 #define DECL_MN // Incl 68k keyword state machine tables
31 #define DEF_REG68 // Incl 68k register definitions
38 #define DEF_MP // Include 6502 keyword definitions
39 #define DECL_MP // Include 6502 keyword state machine tables
42 #define DEF_MO // Include OP keyword definitions
43 #define DECL_MO // Include OP keyword state machine tables
46 #define DEF_DSP // Include DSP56K keywords definitions
47 #define DECL_DSP // Include DSP56K keyword state machine tables
49 #define DEF_REG56 // Include DSP56K register definitions
52 IFENT * ifent; // Current ifent
53 static IFENT ifent0; // Root ifent
54 IFENT * f_ifent; // Freelist of ifents
55 int disabled; // Assembly conditionally disabled
56 int just_bss; // 1, ds.b in microprocessor mode
57 uint32_t pcloc; // Value of "PC" at beginning of line
58 SYM * lab_sym; // Label on line (or NULL)
59 char * label_defined; // The name of the last label defined in current line (if any)
61 const char extra_stuff[] = "extra (unexpected) text found after addressing mode";
62 const char comma_error[] = "missing comma";
63 const char syntax_error[] = "syntax error";
64 const char locgl_error[] = "cannot GLOBL local symbol";
65 const char lab_ignored[] = "label ignored";
67 // Table to convert an addressing-mode number to a bitmask.
68 LONG amsktab[0124] = {
69 M_DREG, M_DREG, M_DREG, M_DREG,
70 M_DREG, M_DREG, M_DREG, M_DREG,
72 M_AREG, M_AREG, M_AREG, M_AREG,
73 M_AREG, M_AREG, M_AREG, M_AREG,
75 M_AIND, M_AIND, M_AIND, M_AIND,
76 M_AIND, M_AIND, M_AIND, M_AIND,
78 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
79 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
81 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
82 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
84 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
85 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
87 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
88 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
120 // Function prototypes
121 int HandleLabel(char *, int);
124 // Initialize line processor
126 void InitLineProcessor(void)
130 f_ifent = ifent0.if_prev = NULL;
139 int state; // Keyword machine state (output)
140 int j; // Random int, must be fast
141 char * p; // Random char ptr, must be fast
142 TOKEN * tk; // First token in line
143 char * label; // Symbol (or NULL)
144 char * equate; // Symbol (or NULL)
145 int labtyp = 0; // Label type (':', DCOLON)
146 int equtyp = 0; // Equ type ('=', DEQUALS)
147 uint64_t eval; // Expression value
148 WORD eattr; // Expression attributes
149 SYM * esym; // External symbol involved in expr.
150 WORD siz = 0; // Size suffix to mnem/diretve/macro
151 LONG amsk0, amsk1; // Address-type masks for ea0, ea1
152 MNTAB * m; // Code generation table pointer
153 SYM * sy, * sy2; // Symbol (temp usage)
154 char * opname = NULL; // Name of dirctve/mnemonic/macro
155 int listflag; // 0: Don't call listeol()
156 WORD rmask; // Register list, for REG
157 int equreg; // RISC register
158 listflag = 0; // Initialise listing flag
160 loop: // Line processing loop label
162 // Get another line of tokens
163 if (TokenizeLine() == TKEOF)
165 DEBUG { printf("Assemble: Found TKEOF flag...\n"); }
166 if (list_flag && listflag) // Flush last line of source
169 if (ifent->if_prev != NULL) // Check conditional token
170 error("hit EOF without finding matching .endif");
175 DEBUG { DumpTokenBuffer(); }
179 if (listflag && listing > 0)
180 listeol(); // Tell listing generator about EOL
182 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
183 listflag = 1; // OK to call `listeol' now
184 just_bss = 0; // Reset just_bss mode
187 state = -3; // No keyword (just EOL)
188 label = NULL; // No label
189 label_defined = NULL; // No label defined yet
190 lab_sym = NULL; // No (exported) label
191 equate = NULL; // No equate
192 tk = tok; // Save first token in line
193 pcloc = (uint32_t)sloc; // Set beginning-of-line PC
195 loop1: // Internal line processing loop
197 if (*tok == EOL) // Restart loop if end-of-line
200 // First token MUST be a symbol (Shamus: not sure why :-/)
203 error("syntax error; expected symbol");
208 j = (int)tok[2]; // Skip equates (normal statements)
210 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
212 equate = string[tok[1]];
218 // Skip past label (but record it)
219 if (j == ':' || j == DCOLON)
221 label = string[tok[1]]; // Get label name
222 labtyp = tok[2]; // Get label type
223 tok += 3; // Go to next line token
226 // EOL is legal here...
230 // First token MUST be a symbol (if we get here, tok didn't advance)
231 if (*tok++ != SYMBOL)
233 error("syntax error; expected symbol");
237 opname = p = string[*tok++];
239 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
240 // On output, `state' will have one of the values:
241 // -3 there was no symbol (EOL)
242 // -2..-1 the symbol didn't match any keyword
243 // 0..499 vanilla directives (dc, ds, etc.)
244 // 500..999 electric directives (macro, rept, etc.)
245 // 1000..+ mnemonics (move, lsr, etc.)
246 for(state=0; state>=0;)
248 j = mnbase[state] + (int)tolowertab[*p];
250 // Reject, character doesn't match
251 if (mncheck[j] != state)
253 state = -1; // No match
257 // Must accept or reject at EOS
260 state = mnaccept[j]; // (-1 on no terminal match)
267 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
272 case DOTW: siz = SIZW, tok++; break;
273 case DOTL: siz = SIZL, tok++; break;
274 case DOTB: siz = SIZB, tok++; break;
275 case DOTD: siz = SIZD, tok++; break;
276 case DOTP: siz = SIZP, tok++; break;
277 case DOTQ: siz = SIZQ, tok++; break;
278 case DOTS: siz = SIZS, tok++; break;
279 case DOTX: siz = SIZX, tok++; break;
282 // Do special directives (500..999) (These must be handled in "real time")
283 if (state >= 500 && state < 1000)
299 case MN_IIF: // .iif --- immediate if
300 if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
303 if (!(eattr & DEFINED))
320 case MN_MACRO: // .macro --- macro definition
323 // Label on a macro definition is bad mojo... Warn the user
332 case MN_EXITM: // .exitm --- exit macro
333 case MN_ENDM: // .endm --- same as .exitm
347 // Handle labels on REPT directive lines...
350 if (HandleLabel(label, labtyp) != 0)
353 label_defined = label;
363 error("mis-nested .endr");
370 if (disabled) // Conditionally disabled code
376 // Pick global or local symbol enviroment
377 j = (*equate == '.' ? curenv : 0);
378 sy = lookup(equate, LABEL, j);
382 sy = NewSymbol(equate, LABEL, j);
385 if (equtyp == DEQUALS)
387 // Can't GLOBAL a local symbol
397 else if ((sy->sattr & DEFINED) && equtyp != SET)
399 if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
401 sy->sattre &= ~UNDEF_EQUR;
404 else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
406 sy->sattre &= ~UNDEF_CC;
411 error("multiple equate to '%s'", sy->sname);
416 // Put symbol in "order of definition" list if it's not already there
417 AddToSymbolDeclarationList(sy);
419 // Parse value to equate symbol to;
423 if (equtyp == EQUREG)
425 //Linko's request to issue a warning on labels that equated to the same
426 //register would go here. Not sure how to implement it though. :-/
429 have an array of bools with 64 entries. Whenever a register is equated, set the
430 corresponding register bool to true. Whenever it's undef'ed, set it to false.
431 When checking to see if it's already been equated, issue a warning.
434 // Check for register to equate to
435 // This check will change once we split the registers per architecture into their own tables
436 // and out of kw.tab. But for now it'll do...
437 if ((*tok >= REG68_D0) && (*tok <= REG56_BA))
439 sy->sattre = EQUATEDREG; // Mark as equated register
441 // Check for ",<bank #>" override notation and skip past it.
442 // It is ignored now. Was that ever useful anyway?
443 if ((rgpu ||rdsp) && (tok[1] == ',') && (tok[2] == CONST))
445 // Advance token pointer and skip everything
449 eattr = ABS | DEFINED | GLOBAL;
453 // Checking for a register symbol
454 else if (tok[0] == SYMBOL)
456 sy2 = lookup(string[tok[1]], LABEL, j);
458 // Make sure symbol is a valid equreg
459 if (!sy2 || !(sy2->sattre & EQUATEDREG))
461 error("invalid .equr/.regequ definition");
466 eattr = ABS | DEFINED | GLOBAL; // Copy symbol's attributes
467 sy->sattre = sy2->sattre;
468 eval = (sy2->svalue & 0xFFFFF0FF);
474 error("invalid .equr/.regequ definition");
478 else if (equtyp == REG)
480 if (reglist(&rmask) < 0)
483 eval = (uint32_t)rmask;
484 eattr = ABS | DEFINED;
486 else if (equtyp == CCDEF)
488 sy->sattre |= EQUATEDCC;
489 eattr = ABS | DEFINED | GLOBAL;
491 if (tok[0] == SYMBOL)
493 sy2 = lookup(string[tok[1]], LABEL, j);
495 if (!sy2 || !(sy2->sattre & EQUATEDCC))
497 error("invalid gpu/dsp .ccdef definition");
502 eattr = ABS | DEFINED | GLOBAL;
503 sy->sattre = sy2->sattre;
508 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
512 else if (*tok == SYMBOL)
514 sy2 = lookup(string[tok[1]], LABEL, j);
516 if (sy2 && (sy2->sattre & EQUATEDREG))
518 sy->stype = sy2->stype;
519 sy->sattr = sy2->sattr;
520 sy->sattre = sy2->sattre;
521 sy->svalue = sy2->svalue;
524 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
527 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
530 if (!(eattr & DEFINED))
536 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
539 if (list_flag) // Put value in listing
540 listvalue((uint32_t)eval);
542 ErrorIfNotAtEOL(); // Must be at EOL now
549 // Non-zero == error occurred
550 if (HandleLabel(label, labtyp) != 0)
553 label_defined = label;
560 // If we're in 6502 mode and are still in need of a mnemonic, then search
561 // for valid 6502 mnemonic.
562 if (m6502 && (state < 0 || state >= 1000))
565 state = kmatch(opname, mpbase, mpcheck, mptab, mpaccept);
567 for(state=0, p=opname; state>= 0; )
569 j = mpbase[state] + tolowertab[*p];
571 if (mpcheck[j] != state) // Reject, character doesn't match
573 state = -1; // No match
578 { // Must accept or reject at EOS
579 state = mpaccept[j]; // (-1 on no terminal match)
587 // Call 6502 code generator if we found a mnemonic
590 m6502cg(state - 2000);
595 // If we are in GPU or DSP mode and still in need of a mnemonic then search
597 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
599 for(state=0, p=opname; state>=0;)
601 j = mrbase[state] + (int)tolowertab[*p];
603 // Reject, character doesn't match
604 if (mrcheck[j] != state)
606 state = -1; // No match
610 // Must accept or reject at EOS
613 state = mraccept[j]; // (-1 on no terminal match)
620 // Call RISC code generator if we found a mnemonic
623 GenerateRISCCode(state);
628 // If we are in OP mode and still in need of a mnemonic then search for one
629 if (robjproc && ((state < 0) || (state >= 1000)))
631 for(state=0, p=opname; state>=0;)
633 j = mobase[state] + (int)tolowertab[*p];
635 // Reject, character doesn't match
636 if (mocheck[j] != state)
638 state = -1; // No match
642 // Must accept or reject at EOS
645 state = moaccept[j]; // (-1 on no terminal match)
652 // Call OP code generator if we found a mnemonic
655 GenerateOPCode(state);
660 // If we are in 56K mode and still in need of a mnemonic then search for one
661 if (dsp56001 && ((state < 0) || (state >= 1000)))
663 for(state=0, p=opname; state>=0;)
665 j = dspbase[state] + (int)tolowertab[*p];
667 // Reject, character doesn't match
668 if (dspcheck[j] != state)
670 state = -1; // No match
674 // Must accept or reject at EOS
677 state = dspaccept[j]; // (-1 on no terminal match)
684 // Call DSP code generator if we found a mnemonic
689 MNTABDSP * md = &dsp56k_machtab[state - 2000];
690 deposit_extra_ea = 0; // Assume no extra word needed
692 if (md->mnfunc == dsp_mult)
694 // Special case for multiplication instructions: they require
696 if ((operands = dsp_amode(3)) == ERROR)
699 else if ((md->mnattr & PARMOVE) && md->mn0 != M_AM_NONE)
701 if (dsp_amode(2) == ERROR)
704 else if ((md->mnattr & PARMOVE) && md->mn0 == M_AM_NONE)
706 // Instructions that have parallel moves but use no operands
707 // (probably only move). In this case, don't parse addressing
708 // modes--just go straight to parallel parse
709 dsp_am0 = dsp_am1 = M_AM_NONE;
713 // Non parallel move instructions can have up to 4 parameters
714 // (well, only tcc instructions really)
715 if ((operands = dsp_amode(4)) == ERROR)
720 dsp_tcc4(md->mninst);
725 if (md->mnattr & PARMOVE)
727 // Check for parallel moves
728 if ((parcode = parmoves(dsp_a1reg)) == ERROR)
734 error("parallel moves not allowed with this instruction");
739 while ((dsp_am0 & md->mn0) == 0 || (dsp_am1 & md->mn1) == 0)
740 md = &dsp56k_machtab[md->mncont];
743 (*md->mnfunc)(md->mninst | (parcode << 8));
748 // Invoke macro or complain about bad mnemonic
751 if ((sy = lookup(opname, MACRO, 0)) != NULL)
752 InvokeMacro(sy, siz);
754 error("unknown op '%s'", opname);
759 // Call directive handlers
762 (*dirtab[state])(siz);
767 // o can't deposit instrs in BSS or ABS
768 // o do automatic .EVEN for instrs
769 // o allocate space for largest possible instr
770 // o can't do ".b" operations with an address register
773 error("cannot initialize non-storage (BSS) section");
777 if (sloc & 1) // Automatic .even
780 if (challoc - ch_size < 18) // Make sure have space in current chunk
783 m = &machtab[state - 1000];
785 // Call special-mode handler
786 if (m->mnattr & CGSPECIAL)
789 (*m->mnfunc)(m->mninst, siz);
793 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
796 // Check that we're at EOL
797 // The only exception is ptestr/ptestw instructions
798 // that have 3 or 4 operands and are not handled by
799 // amode(). (yes, we're taking a performance hit here sadly)
800 if (m->mnfunc != m_ptestr && m->mnfunc != m_ptestw)
804 amsk0 = amsktab[am0];
805 amsk1 = amsktab[am1];
807 // Catch attempts to use ".B" with an address register (yes, this check
808 // does work at this level)
809 if (siz == SIZB && (am0 == AREG || am1 == AREG))
811 error("cannot use '.b' with an address register");
815 // Keep a backup of chptr (used for optimisations during codegen)
816 chptr_opcode = chptr;
818 while (!(m->mnattr & siz) || (amsk0 & m->mn0) == 0 || (amsk1 & m->mn1) == 0)
819 m = &machtab[m->mncont];
821 DEBUG { printf(" 68K: mninst=$%X, siz=$%X, mnattr=$%X, amsk0=$%X, mn0=$%X, amsk1=$%X, mn1=$%X\n", m->mninst, siz, m->mnattr, amsk0, m->mn0, amsk1, m->mn1); }
824 (*m->mnfunc)(m->mninst, siz);
829 // Handle the creation of labels
831 int HandleLabel(char * label, int labelType)
833 // Check for dot in front of label; means this is a local label if present
834 int environment = (*label == '.' ? curenv : 0);
835 SYM * symbol = lookup(label, LABEL, environment);
839 symbol = NewSymbol(label, LABEL, environment);
843 else if (symbol->sattr & DEFINED)
844 return error("multiply-defined label '%s'", label);
846 // Put symbol in "order of definition" list if it's not already in it
847 AddToSymbolDeclarationList(symbol);
851 symbol->svalue = orgaddr;
852 symbol->sattr |= ABS | DEFINED | EQUATED;
856 symbol->svalue = sloc;
857 symbol->sattr |= DEFINED | cursect;
862 // Yes, our CS professors told us to write checks for equality this way,
863 // but damn, it hurts my brain every time I look at it. :-/
864 if (0 == environment)
867 // Make label global if it has a double colon
868 if (labelType == DCOLON)
870 if (environment != 0)
871 return error(locgl_error);
873 symbol->sattr |= GLOBAL;