X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=procln.c;h=9c207bfdefe8481ca71195ad1ad7c3aaaf7c3471;hp=3f8ade52efae07fd977388411fcbd85009b8b970;hb=4205233c8397c581b4d27ab36ab81ec896ef3dd0;hpb=d28f432296e812643e236d1bfc9b556a7b11c461 diff --git a/procln.c b/procln.c index 3f8ade5..9c207bf 100644 --- a/procln.c +++ b/procln.c @@ -1,611 +1,925 @@ -//////////////////////////////////////////////////////////////////////////////////////////////////// -// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System +// +// RMAC - Reboot's Macro Assembler for all Atari computers // PROCLN.C - Line Processing -// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends +// Copyright (C) 199x Landon Dyer, 2011-2020 Reboot and Friends // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986 -// Source Utilised with the Kind Permission of Landon Dyer +// Source utilised with the kind permission of Landon Dyer +// #include "procln.h" -#include "listing.h" +#include "6502.h" #include "amode.h" +#include "direct.h" +#include "dsp56k_amode.h" +#include "dsp56k_mach.h" #include "error.h" -#include "sect.h" #include "expr.h" +#include "listing.h" #include "mach.h" -#include "direct.h" #include "macro.h" +#include "op.h" +#include "riscasm.h" +#include "sect.h" #include "symbol.h" -#include "risca.h" -#define DEF_KW // Declare keyword values -#include "kwtab.h" // Incl generated keyword tables & defs +#define DEF_KW // Declare keyword values +#include "kwtab.h" // Incl generated keyword tables & defs -#define DEF_MN // Incl 68k keyword definitions -#define DECL_MN // Incl 68k keyword state machine tables +#define DEF_MN // Incl 68k keyword definitions +#define DECL_MN // Incl 68k keyword state machine tables #include "mntab.h" #define DEF_MR #define DECL_MR #include "risckw.h" -IFENT *ifent; // Current ifent -static IFENT ifent0; // Root ifent -static IFENT *f_ifent; // Freelist of ifents -static int disabled; // Assembly conditionally disabled -int just_bss; // 1, ds.b in microprocessor mode -VALUE pcloc; // Value of "PC" at beginning of line -IFENT *ifent; // Current ifent -SYM *lab_sym; // Label on line (or NULL) +#define DEF_MP // Include 6502 keyword definitions +#define DECL_MP // Include 6502 keyword state machine tables +#include "6502kw.h" +#define DEF_MO // Include OP keyword definitions +#define DECL_MO // Include OP keyword state machine tables +#include "opkw.h" -char extra_stuff[] = "extra (unexpected) text found after addressing mode"; -char *comma_error = "missing comma"; -char *syntax_error = "syntax error"; -char *locgl_error = "cannot GLOBL local symbol"; -char *lab_ignored = "label ignored"; +#define DEF_DSP // Include DSP56K keywords definitions +#define DECL_DSP // Include DSP56K keyword state machine tables +#include "dsp56kkw.h" -// Table to convert an addressing-mode number to a bitmask. -LONG amsktab[0112] = { - M_DREG, M_DREG, M_DREG, M_DREG, - M_DREG, M_DREG, M_DREG, M_DREG, - - M_AREG, M_AREG, M_AREG, M_AREG, - M_AREG, M_AREG, M_AREG, M_AREG, - - M_AIND, M_AIND, M_AIND, M_AIND, - M_AIND, M_AIND, M_AIND, M_AIND, - - M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC, - M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC, - - M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC, - M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC, - - M_ADISP, M_ADISP, M_ADISP, M_ADISP, - M_ADISP, M_ADISP, M_ADISP, M_ADISP, - - M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED, - M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED, - - M_ABSW, // 070 - M_ABSL, // 071 - M_PCDISP, // 072 - M_PCINDEXED, // 073 - M_IMMED, // 074 - 0L, // 075 - 0L, // 076 - 0L, // 077 - M_ABASE, // 0100 - M_MEMPOST, // 0101 - M_MEMPRE, // 0102 - M_PCBASE, // 0103 - M_PCMPOST, // 0104 - M_PCMPRE, // 0105 - M_AM_USP, // 0106 - M_AM_SR, // 0107 - M_AM_CCR, // 0110 - M_AM_NONE // 0111 -}; // 0112 length -// -// --- Initialize Line Processor ------------------------------------------------------------------- -// +IFENT * ifent; // Current ifent +static IFENT ifent0; // Root ifent +IFENT * f_ifent; // Freelist of ifents +int disabled; // Assembly conditionally disabled +int just_bss; // 1, ds.b in microprocessor mode +uint32_t pcloc; // Value of "PC" at beginning of line +SYM * lab_sym; // Label on line (or NULL) +char * label_defined; // The name of the last label defined in current line (if any) -void init_procln(void) { - disabled = 0; - ifent = &ifent0; - f_ifent = ifent0.if_prev = NULL; - ifent0.if_state = 0; -} +const char extra_stuff[] = "extra (unexpected) text found after addressing mode"; +const char comma_error[] = "missing comma"; +const char syntax_error[] = "syntax error"; +const char locgl_error[] = "cannot GLOBL local symbol"; +const char lab_ignored[] = "label ignored"; -// -// --- Line Processor ------------------------------------------------------------------------------ -// +// Table to convert an addressing-mode number to a bitmask. +LONG amsktab[0124] = { + M_DREG, M_DREG, M_DREG, M_DREG, + M_DREG, M_DREG, M_DREG, M_DREG, + + M_AREG, M_AREG, M_AREG, M_AREG, + M_AREG, M_AREG, M_AREG, M_AREG, + + M_AIND, M_AIND, M_AIND, M_AIND, + M_AIND, M_AIND, M_AIND, M_AIND, + + M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC, + M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC, + + M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC, + M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC, + + M_ADISP, M_ADISP, M_ADISP, M_ADISP, + M_ADISP, M_ADISP, M_ADISP, M_ADISP, + + M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED, + M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED, + + M_ABSW, // 070 + M_ABSL, // 071 + M_PCDISP, // 072 + M_PCINDEXED, // 073 + M_IMMED, // 074 + 0L, // 075 + 0L, // 076 + 0L, // 077 + M_ABASE, // 0100 + M_MEMPOST, // 0101 + M_MEMPRE, // 0102 + M_PCBASE, // 0103 + M_PCMPOST, // 0104 + M_PCMPRE, // 0105 + M_AM_USP, // 0106 + M_AM_SR, // 0107 + M_AM_CCR, // 0110 + M_AM_NONE, // 0111 + 0x30, // 0112 + 0x30, // 0113 + 0L, // 0114 + 0L, // 0115 + 0L, // 0116 + 0L, // 0117 + M_CACHE40, // 0120 + M_CREG, // 0121 + M_FREG, // 0122 + M_FPSCR // 0123 +}; // 0123 length + + +// Function prototypes +int HandleLabel(char *, int); -void assemble(void) { - int state; // Keyword machine state (output) - int j; // Random int, must be fast - char *p; // Random char ptr, must be fast - TOKEN *tk; // First token in line - char *label; // Symbol (or NULL) - char *equate; // Symbol (or NULL) - int labtyp = 0; // Label type (':', DCOLON) - int equtyp = 0; // Equ type ('=', DEQUALS) - VALUE eval; // Expression value - WORD eattr; // Expression attributes - SYM *esym; // External symbol involved in expr. - WORD siz = 0; // Size suffix to mnem/diretve/macro - LONG amsk0, amsk1; // Address-type masks for ea0, ea1 - MNTAB *m; // Code generation table pointer - SYM *sy, *sy2; // Symbol (temp usage) - char *opname = NULL; // Name of dirctve/mnemonic/macro - int listflag; // 0: Don't call listeol() - int as68mode = 0; // 1: Handle multiple labels - WORD rmask; // Register list, for REG - int registerbank; // RISC register bank - int riscreg; // RISC register - - listflag = 0; // Initialise listing flag - - loop: // Line processing loop label - - if(tokln() == TKEOF) { // Get another line of tokens - if(list_flag && listflag) // Flush last line of source - listeol(); - if(ifent->if_prev != NULL) // Check conditional token - error("hit EOF without finding matching .endif"); - return; - } - - if(list_flag) { - if(listflag && listing > 0) listeol(); // Tell listing generator about EOL - lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing - listflag = 1; // OK to call `listeol' now - just_bss = 0; // Reset just_bss mode - } - - state = -3; // No keyword (just EOL) - label = NULL; // No label - lab_sym = NULL; // No (exported) label - equate = NULL; // No equate - tk = tok; // Save first token in line - pcloc = (VALUE)sloc; // Set beginning-of-line PC - - loop1: // Internal line processing loop - - if(*tok == EOL) // Restart loop if end-of-line - goto loop; - - if(*tok != SYMBOL) { // First token MUST be a symbol - error(syntax_error); - goto loop; - } - - j = (int)tok[2]; // Skip equates (normal statements) - if(j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF) { - equate = (char *)tok[1]; - equtyp = j; - tok += 3; - goto normal; - } - - if(j == ':' || j == DCOLON) { // Skip past label (but record it) - - as68label: - - label = (char *)tok[1]; // Get label name - labtyp = tok[2]; // Get label type - tok += 3; // Go to next line token - - // Handle multiple labels; if there's another label, go process it, - // and come back at `as68label' above. - if(as68_flag) { - as68mode = 0; - if(*tok == SYMBOL && tok[2] == ':') { - as68mode = 1; - goto do_label; - } - } - } - - if(*tok == EOL) // EOL is legal here... - goto normal; - - if(*tok++ != SYMBOL) { // Next token MUST be a symbol - error(syntax_error); - goto loop; - } - opname = p = (char *)*tok++; // Store opcode name here - - // Check to see if the SYMBOL is a keyword (a mnemonic or directive). - // On output, `state' will have one of the values: - // -3 there was no symbol (EOL) - // -2..-1 the symbol didn't match any keyword - // 0..499 vanilla directives (dc, ds, etc.) - // 500..999 electric directives (macro, rept, etc.) - // 1000..+ mnemonics (move, lsr, etc.) - for(state = 0; state >= 0;) { - j = mnbase[state] + (int)tolowertab[*p]; - if(mncheck[j] != state) { // Reject, character doesn't match - state = -1; // No match - break; - } - if(!*++p) { // Must accept or reject at EOS - state = mnaccept[j]; // (-1 on no terminal match) - break; - } - state = mntab[j]; - } - - // Check for ".b" ".w" ".l" after directive, macro or mnemonic. - siz = SIZN; - if(*tok == DOTW) - siz = SIZW, ++tok; - else if(*tok == DOTL) - siz = SIZL, ++tok; - else if(*tok == DOTB) - siz = SIZB, ++tok; - - // Do special directives (500..999) (These must be handled in "real time") - if(state >= 500 && state < 1000) - switch(state) { - case MN_IF: - d_if(); - goto loop; - case MN_ELSE: - d_else(); - goto loop; - case MN_ENDIF: - d_endif(); - goto loop; - case MN_IIF: // .iif --- immediate if - if(disabled || expr(exprbuf, &eval, &eattr, &esym) != OK) - goto loop; - if(!(eattr & DEFINED)) { - error(undef_error); - goto loop; - } - if(*tok++ != ',') { - error(comma_error); - goto loop; - } - if(eval == 0) - goto loop; - goto loop1; - case MN_MACRO: // .macro --- macro definition - if(!disabled) { - if(label != NULL) - warn(lab_ignored); - defmac(); - } - goto loop; - case MN_EXITM: // .exitm --- exit macro - case MN_ENDM: // .endm --- same as .exitm - if(!disabled) { - if(label != NULL) - warn(lab_ignored); - exitmac(); - } - goto loop; - case MN_REPT: - if(!disabled) { - if(label != NULL) - warn(lab_ignored); - defrept(); - } - goto loop; - case MN_ENDR: - if(!disabled) - error("mis-nested .endr"); - goto loop; - } - - normal: - - if(disabled) // Conditionally disabled code - goto loop; - - // Do equates - if(equate != NULL) { - j = 0; // Pick global or local sym enviroment - if(*equate == '.') - j = curenv; - - sy = lookup(equate, LABEL, j); - if(sy == NULL) { - sy = newsym(equate, LABEL, j); - sy->sattr = 0; - if(equtyp == DEQUALS) { - if(j) { // Can't GLOBAL a local symbol - error(locgl_error); - goto loop; - } - sy->sattr = GLOBAL; - } - } else if((sy->sattr & DEFINED) && equtyp != SET) { - if((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR)) { - sy->sattre |= ~UNDEF_EQUR; - sy->svalue = 0; - } else if((equtyp == CCDEF) && (sy->sattre & UNDEF_CC)) { - sy->sattre |= ~UNDEF_CC; - sy->svalue = 0; - } else { - errors("multiple equate to '%s'", sy->sname); - goto loop; - } - } - - // Put symbol in "order of definition" list - if(!(sy->sattr & SDECLLIST)) sym_decl(sy); - - // Parse value to equate symbol to; - // o .equr - // o .reg - // o everything else - if(equtyp == EQUREG) { - if(!rgpu && !rdsp) { // Check that we are in a RISC section - error(".equr/.regequ must be defined in .gpu/.dsp section"); - goto loop; - } - if((*tok >= KW_R0) && (*tok <= KW_R31)) { // Check for register to equate to - sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register - riscreg = (*tok - KW_R0); - sy->sattre |= (riscreg << 8); // Store register number - if((tok[1] == ',') && (tok[2] == CONST)) { - tok += 3; - if(*tok == 0) registerbank = BANK_0; - else if(*tok == 1) registerbank = BANK_1; - else registerbank = BANK_N; - } else { - registerbank = BANK_N; - } - sy->sattre |= regbank; // Store register bank - eattr = ABS | DEFINED | GLOBAL; - eval = 0x80000080 + (riscreg) + (registerbank << 8); - tok++; - } else if(tok[0] == SYMBOL) { // Checking for a register symbol - sy2 = lookup((char *)tok[1], LABEL, j); - if(!sy2 || !(sy2->sattre & EQUATEDREG)) { // Make sure symbol is a valid equreg - error("invalid GPU/DSP .equr/.regequ definition"); - goto loop; - } else { - eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes - sy->sattre = sy2->sattre; - eval = (sy2->svalue & 0xFFFFF0FF); - tok += 2; - } - } else { - error("invalid GPU/DSP .equr/.regequ definition"); - goto loop; - } - } else if(equtyp == REG) { - if(reglist(&rmask) < 0) - goto loop; - eval = (VALUE)rmask; - eattr = ABS | DEFINED; - } else if(equtyp == CCDEF) { - sy->sattre |= EQUATEDCC; - eattr = ABS | DEFINED | GLOBAL; - if(tok[0] == SYMBOL) { - sy2 = lookup((char *)tok[1], LABEL, j); - if(!sy2 || !(sy2->sattre & EQUATEDCC)) { - error("invalid gpu/dsp .ccdef definition"); - goto loop; - } else { - eattr = ABS | DEFINED | GLOBAL; - sy->sattre = sy2->sattre; - eval = sy2->svalue; - tok += 2; - } - } else - if(expr(exprbuf, &eval, &eattr, &esym) != OK) - goto loop; - } else if(*tok == SYMBOL) { //equ a equr - sy2 = lookup((char *)tok[1], LABEL, j); - if(sy2 && (sy2->sattre & EQUATEDREG)) { - sy->stype = sy2->stype; - sy->sattr = sy2->sattr; - sy->sattre = sy2->sattre; - sy->svalue = (sy2->svalue & 0xFFFFF0FF); - goto loop; - } else - if(expr(exprbuf, &eval, &eattr, &esym) != OK) - goto loop; - } else - if(expr(exprbuf, &eval, &eattr, &esym) != OK) - goto loop; - - if(!(eattr & DEFINED)) { - error(undef_error); - goto loop; - } - - - sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes - sy->svalue = eval; - if(list_flag) // Put value in listing - listvalue(eval); - - at_eol(); // Must be at EOL now - goto loop; - } - - // Do labels - if(label != NULL) { - - do_label: - - j = 0; - if(*label == '.') - j = curenv; - sy = lookup(label, LABEL, j); - - if(sy == NULL) { - sy = newsym(label, LABEL, j); - sy->sattr = 0; - sy->sattre = RISCSYM; - } else if(sy->sattr & DEFINED) { - errors("multiply-defined label '%s'", label); - goto loop; - } - - // Put symbol in "order of definition" list - if(!(sy->sattr & SDECLLIST)) sym_decl(sy); - - if(orgactive) { - sy->svalue = orgaddr; - sy->sattr |= ABS | DEFINED | EQUATED; - } else { - sy->svalue = sloc; - sy->sattr |= DEFINED | cursect; - } - - lab_sym = sy; - if(!j) - ++curenv; - - if(labtyp == DCOLON) { // Make label global - if(j) { - error(locgl_error); - goto loop; - } - sy->sattr |= GLOBAL; - } - - // If we're in as68 mode, and there's another label, go back and handle it - if(as68_flag && as68mode) - goto as68label; - } - - // Punt on EOL - if(state == -3) - goto loop; - - // If we are in GPU or DSP mode and still in need of a mnemonic then search for one - if((rgpu || rdsp) && (state < 0 || state >= 1000)) { - for(state = 0, p = opname; state >= 0;) { - j = mrbase[state] + (int)tolowertab[*p]; - if(mrcheck[j] != state) { // Reject, character doesn't match - state = -1; // No match - break; - } - - if(!*++p) { // Must accept or reject at EOS - state = mraccept[j]; // (-1 on no terminal match) - break; - } - state = mrtab[j]; - } - - // Call RISC code generator if we found a mnemonic - if(state >= 3000) { - risccg(state); - goto loop; - } - } - - // Invoke macro or complain about bad mnemonic - if(state < 0) { - if((sy = lookup(opname, MACRO, 0)) != NULL) - invokemac(sy, siz); - else errors("unknown op '%s'", opname); - goto loop; - } - - // Call directive handlers - if(state < 500) { - (*dirtab[state])(siz); - goto loop; - } - - // Do mnemonics - // o can't deposit instrs in BSS or ABS - // o do automatic .EVEN for instrs - // o allocate space for largest possible instr - // o can't do ".b" operations with an address register - if(scattr & SBSS) { - error("cannot initialize non-storage (BSS) section"); - goto loop; - } - - if(sloc & 1) // Automatic .even - auto_even(); - - if(challoc - ch_size < 18) // Make sure have space in current chunk - chcheck(0L); - - m = &machtab[state - 1000]; - if(m->mnattr & CGSPECIAL) { // Call special-mode handler - (*m->mnfunc)(m->mninst, siz); - goto loop; - } - - if(amode(1) < 0) // Parse 0, 1 or 2 addr modes - goto loop; - - if(*tok != EOL) - error(extra_stuff); - - amsk0 = amsktab[am0]; - amsk1 = amsktab[am1]; - - // Catch attempts to use ".B" with an address register (yes, this check does work at this level) - if(siz == SIZB && (am0 == AREG || am1 == AREG)) { - error("cannot use '.b' with an address register"); - goto loop; - } - - for(;;) { - if((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0) { - (*m->mnfunc)(m->mninst, siz); - goto loop; - } - m = &machtab[m->mncont]; - } -} -// -// --- .if, Start Conditional Assembly ------------------------------------------------------------- // - -int d_if(void) { - IFENT *rif; - WORD eattr; - VALUE eval; - SYM *esym; - - // Alloc an IFENTRY - if((rif = f_ifent) == NULL) rif = (IFENT *)amem((LONG)sizeof(IFENT)); - else f_ifent = rif->if_prev; - - rif->if_prev = ifent; - ifent = rif; - - if(!disabled) { - if(expr(exprbuf, &eval, &eattr, &esym) != OK) return(0); - if((eattr & DEFINED) == 0) return(error(undef_error)); - disabled = !eval; - } - rif->if_state = (WORD)disabled; - return(0); -} - -// -// --- .else, Do Alternate Case For .if ------------------------------------------------------------ +// Initialize line processor // - -int d_else(void) { - IFENT *rif; - - rif = ifent; - - if(rif->if_prev == NULL) return(error("mismatched .else")); - - if(disabled) disabled = rif->if_prev->if_state; - else disabled = 1; - - rif->if_state = (WORD)disabled; - return(0); +void InitLineProcessor(void) +{ + disabled = 0; + ifent = &ifent0; + f_ifent = ifent0.if_prev = NULL; + ifent0.if_state = 0; } + // -// ------------------------------------------------------------------------------------------------- -// .endif, End of conditional assembly block -// This is also called by fpop() to pop levels of IFENTs in case a macro or include file exits -// early with `exitm' or `end'. -// ------------------------------------------------------------------------------------------------- +// Line processor // +void Assemble(void) +{ + int state; // Keyword machine state (output) + int j; // Random int, must be fast + char * p; // Random char ptr, must be fast + TOKEN * tk; // First token in line + char * label; // Symbol (or NULL) + char * equate; // Symbol (or NULL) + int labtyp = 0; // Label type (':', DCOLON) + int equtyp = 0; // Equ type ('=', DEQUALS) + uint64_t eval; // Expression value + WORD eattr; // Expression attributes + SYM * esym; // External symbol involved in expr. + WORD siz = 0; // Size suffix to mnem/diretve/macro + LONG amsk0, amsk1; // Address-type masks for ea0, ea1 + MNTAB * m; // Code generation table pointer + SYM * sy, * sy2; // Symbol (temp usage) + char * opname = NULL; // Name of dirctve/mnemonic/macro + int listflag; // 0: Don't call listeol() + WORD rmask; // Register list, for REG + int registerbank; // RISC register bank + int riscreg; // RISC register + listflag = 0; // Initialise listing flag + +loop: // Line processing loop label + + // Get another line of tokens + if (TokenizeLine() == TKEOF) + { +DEBUG { printf("Assemble: Found TKEOF flag...\n"); } + if (list_flag && listflag) // Flush last line of source + listeol(); + + if (ifent->if_prev != NULL) // Check conditional token + error("hit EOF without finding matching .endif"); + + return; + } + + DEBUG { DumpTokenBuffer(); } + + if (list_flag) + { + if (listflag && listing > 0) + listeol(); // Tell listing generator about EOL + + lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing + listflag = 1; // OK to call `listeol' now + just_bss = 0; // Reset just_bss mode + } + + state = -3; // No keyword (just EOL) + label = NULL; // No label + label_defined = NULL; // No label defined yet + lab_sym = NULL; // No (exported) label + equate = NULL; // No equate + tk = tok; // Save first token in line + pcloc = (uint32_t)sloc; // Set beginning-of-line PC + +loop1: // Internal line processing loop + + if (*tok == EOL) // Restart loop if end-of-line + goto loop; + + // First token MUST be a symbol (Shamus: not sure why :-/) + if (*tok != SYMBOL) + { + if ((*tok >= KW_D0) && (*tok <= KW_R31)) + error("cannot use reserved keyword as label name or .equ"); + else + error("syntax error; expected symbol"); + + goto loop; + } + + j = (int)tok[2]; // Skip equates (normal statements) + + if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF) + { + equate = string[tok[1]]; + equtyp = j; + tok += 3; + goto normal; + } + + // Skip past label (but record it) + if (j == ':' || j == DCOLON) + { +as68label: + label = string[tok[1]]; // Get label name + labtyp = tok[2]; // Get label type + tok += 3; // Go to next line token + + // AS68 MODE: + // Looks like another label follows the previous one, so handle + // the previous one until there aren't any more + if (as68_flag && (*tok == SYMBOL && tok[2] == ':')) + { + if (HandleLabel(label, labtyp) != 0) + goto loop; + + label_defined = label; + + goto as68label; + } + } + + // EOL is legal here... + if (*tok == EOL) + goto normal; + + // First token MUST be a symbol (if we get here, tok didn't advance) + if (*tok++ != SYMBOL) + { + error("syntax error; expected symbol"); + goto loop; + } + + opname = p = string[*tok++]; + + // Check to see if the SYMBOL is a keyword (a mnemonic or directive). + // On output, `state' will have one of the values: + // -3 there was no symbol (EOL) + // -2..-1 the symbol didn't match any keyword + // 0..499 vanilla directives (dc, ds, etc.) + // 500..999 electric directives (macro, rept, etc.) + // 1000..+ mnemonics (move, lsr, etc.) + for(state=0; state>=0;) + { + j = mnbase[state] + (int)tolowertab[*p]; + + // Reject, character doesn't match + if (mncheck[j] != state) + { + state = -1; // No match + break; + } + + // Must accept or reject at EOS + if (!*++p) + { + state = mnaccept[j]; // (-1 on no terminal match) + break; + } + + state = mntab[j]; + } + + // Check for ".b" ".w" ".l" after directive, macro or mnemonic. + siz = SIZN; + + switch (*tok) + { + case DOTW: siz = SIZW, tok++; break; + case DOTL: siz = SIZL, tok++; break; + case DOTB: siz = SIZB, tok++; break; + case DOTD: siz = SIZD, tok++; break; + case DOTP: siz = SIZP, tok++; break; + case DOTQ: siz = SIZQ, tok++; break; + case DOTS: siz = SIZS, tok++; break; + case DOTX: siz = SIZX, tok++; break; + } + + // Do special directives (500..999) (These must be handled in "real time") + if (state >= 500 && state < 1000) + { + switch (state) + { + case MN_IF: + d_if(); + goto loop; + + case MN_ELSE: + d_else(); + goto loop; + + case MN_ENDIF: + d_endif(); + goto loop; + + case MN_IIF: // .iif --- immediate if + if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK) + goto loop; + + if (!(eattr & DEFINED)) + { + error(undef_error); + goto loop; + } + + if (*tok++ != ',') + { + error(comma_error); + goto loop; + } + + if (eval == 0) + goto loop; + + goto loop1; + + case MN_MACRO: // .macro --- macro definition + if (!disabled) + { + // Label on a macro definition is bad mojo... Warn the user + if (label != NULL) + warn(lab_ignored); + + DefineMacro(); + } + + goto loop; + + case MN_EXITM: // .exitm --- exit macro + case MN_ENDM: // .endm --- same as .exitm + if (!disabled) + { + if (label != NULL) + warn(lab_ignored); + + ExitMacro(); + } + + goto loop; + + case MN_REPT: + if (!disabled) + { + // Handle labels on REPT directive lines... + if (label) + { + if (HandleLabel(label, labtyp) != 0) + goto loop; + + label_defined = label; + } + + HandleRept(); + } + + goto loop; + + case MN_ENDR: + if (!disabled) + error("mis-nested .endr"); + + goto loop; + } + } + +normal: + if (disabled) // Conditionally disabled code + goto loop; + + // Do equates + if (equate != NULL) + { + // Pick global or local symbol enviroment + j = (*equate == '.' ? curenv : 0); + sy = lookup(equate, LABEL, j); + + if (sy == NULL) + { + sy = NewSymbol(equate, LABEL, j); + sy->sattr = 0; + + if (equtyp == DEQUALS) + { + // Can't GLOBAL a local symbol + if (j) + { + error(locgl_error); + goto loop; + } + + sy->sattr = GLOBAL; + } + } + else if ((sy->sattr & DEFINED) && equtyp != SET) + { + if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR)) + { + sy->sattre &= ~UNDEF_EQUR; + sy->svalue = 0; + } + else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC)) + { + sy->sattre &= ~UNDEF_CC; + sy->svalue = 0; + } + else + { + error("multiple equate to '%s'", sy->sname); + goto loop; + } + } + + // Put symbol in "order of definition" list if it's not already there + AddToSymbolDeclarationList(sy); + + // Parse value to equate symbol to; + // o .equr + // o .reg + // o everything else + if (equtyp == EQUREG) + { +//Linko's request to issue a warning on labels that equated to the same +//register would go here. Not sure how to implement it though. :-/ +/* +Maybe like this way: +have an array of bools with 64 entries. Whenever a register is equated, set the +corresponding register bool to true. Whenever it's undef'ed, set it to false. +When checking to see if it's already been equated, issue a warning. +*/ + // Check that we are in a RISC section + if (!rgpu && !rdsp) + { + error(".equr/.regequ must be defined in .gpu/.dsp section"); + goto loop; + } + + // Check for register to equate to + if ((*tok >= KW_R0) && (*tok <= KW_R31)) + { +// sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register + sy->sattre = EQUATEDREG; // Mark as equated register + riscreg = (*tok - KW_R0); +//is there any reason to do this, since we're putting this in svalue? +//i'm thinking, no. Let's test that out! :-D +// sy->sattre |= (riscreg << 8); // Store register number +//everything seems to build fine without it... We'll leave it here Just In Case(tm) + +#define DEBODGE_REGBANK +#ifdef DEBODGE_REGBANK + // Default is current state of "regbank" + registerbank = regbank; +#else + // Default is no register bank specified + registerbank = BANK_N; +#endif + + // Check for "," override notation + if ((tok[1] == ',') && (tok[2] == CONST)) + { + // Advance token pointer to the constant + tok += 3; + + // Anything other than a 0 or a 1 will result in "No Bank" + if (*(uint64_t *)tok == 0) + registerbank = BANK_0; + else if (*(uint64_t *)tok == 1) + registerbank = BANK_1; + } + +#ifdef DEBODGE_REGBANK + sy->sattre |= registerbank; // Store register bank +#else +// What needs to happen here is to prime registerbank with regbank, then use +// registerbank down below for the bank marking. +#warning "!!! regbank <-> registerbank confusion here !!!" +// The question here is why, if we're allowed to override the ".regbankN" rules +// above, then why is it using the one set by the directive in the extended +// attributes and not in what ends up in symbol->svalue? +// ".regbankN" is not an original Madmac directive, so it's suspect + sy->sattre |= regbank; // Store register bank +#endif + eattr = ABS | DEFINED | GLOBAL; + eval = riscreg; + tok++; + } + // Checking for a register symbol + else if (tok[0] == SYMBOL) + { + sy2 = lookup(string[tok[1]], LABEL, j); + + // Make sure symbol is a valid equreg + if (!sy2 || !(sy2->sattre & EQUATEDREG)) + { + error("invalid GPU/DSP .equr/.regequ definition"); + goto loop; + } + else + { + eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes + sy->sattre = sy2->sattre; + eval = (sy2->svalue & 0xFFFFF0FF); + tok += 2; + } + } + else + { + error("invalid GPU/DSP .equr/.regequ definition"); + goto loop; + } + } + else if (equtyp == REG) + { + if (reglist(&rmask) < 0) + goto loop; + + eval = (uint32_t)rmask; + eattr = ABS | DEFINED; + } + else if (equtyp == CCDEF) + { + sy->sattre |= EQUATEDCC; + eattr = ABS | DEFINED | GLOBAL; + + if (tok[0] == SYMBOL) + { + sy2 = lookup(string[tok[1]], LABEL, j); + + if (!sy2 || !(sy2->sattre & EQUATEDCC)) + { + error("invalid gpu/dsp .ccdef definition"); + goto loop; + } + else + { + eattr = ABS | DEFINED | GLOBAL; + sy->sattre = sy2->sattre; + eval = sy2->svalue; + tok += 2; + } + } + else if (expr(exprbuf, &eval, &eattr, &esym) != OK) + goto loop; + } + // equ an equr + else if (*tok == SYMBOL) + { + sy2 = lookup(string[tok[1]], LABEL, j); + + if (sy2 && (sy2->sattre & EQUATEDREG)) + { + sy->stype = sy2->stype; + sy->sattr = sy2->sattr; + sy->sattre = sy2->sattre; + sy->svalue = sy2->svalue; + goto loop; + } + else if (expr(exprbuf, &eval, &eattr, &esym) != OK) + goto loop; + } + else if (expr(exprbuf, &eval, &eattr, &esym) != OK) + goto loop; + + if (!(eattr & DEFINED)) + { + error(undef_error); + goto loop; + } + + sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes + sy->svalue = eval; + + if (list_flag) // Put value in listing + listvalue((uint32_t)eval); + + ErrorIfNotAtEOL(); // Must be at EOL now + goto loop; + } + + // Do labels + if (label != NULL) + { + // Non-zero == error occurred + if (HandleLabel(label, labtyp) != 0) + goto loop; + + label_defined = label; + } + + // Punt on EOL + if (state == -3) + goto loop; + + // If we're in 6502 mode and are still in need of a mnemonic, then search + // for valid 6502 mnemonic. + if (m6502 && (state < 0 || state >= 1000)) + { +#ifdef ST + state = kmatch(opname, mpbase, mpcheck, mptab, mpaccept); +#else + for(state=0, p=opname; state>= 0; ) + { + j = mpbase[state] + tolowertab[*p]; + + if (mpcheck[j] != state) // Reject, character doesn't match + { + state = -1; // No match + break; + } + + if (!*++p) + { // Must accept or reject at EOS + state = mpaccept[j]; // (-1 on no terminal match) + break; + } + + state = mptab[j]; + } +#endif + + // Call 6502 code generator if we found a mnemonic + if (state >= 2000) + { + m6502cg(state - 2000); + goto loop; + } + } + + // If we are in GPU or DSP mode and still in need of a mnemonic then search + // for one + if ((rgpu || rdsp) && (state < 0 || state >= 1000)) + { + for(state=0, p=opname; state>=0;) + { + j = mrbase[state] + (int)tolowertab[*p]; + + // Reject, character doesn't match + if (mrcheck[j] != state) + { + state = -1; // No match + break; + } + + // Must accept or reject at EOS + if (!*++p) + { + state = mraccept[j]; // (-1 on no terminal match) + break; + } + + state = mrtab[j]; + } + + // Call RISC code generator if we found a mnemonic + if (state >= 3000) + { + GenerateRISCCode(state); + goto loop; + } + } + + // If we are in OP mode and still in need of a mnemonic then search for one + if (robjproc && ((state < 0) || (state >= 1000))) + { + for(state=0, p=opname; state>=0;) + { + j = mobase[state] + (int)tolowertab[*p]; + + // Reject, character doesn't match + if (mocheck[j] != state) + { + state = -1; // No match + break; + } + + // Must accept or reject at EOS + if (!*++p) + { + state = moaccept[j]; // (-1 on no terminal match) + break; + } + + state = motab[j]; + } + + // Call OP code generator if we found a mnemonic + if (state >= 3100) + { + GenerateOPCode(state); + goto loop; + } + } + + // If we are in 56K mode and still in need of a mnemonic then search for one + if (dsp56001 && ((state < 0) || (state >= 1000))) + { + for(state=0, p=opname; state>=0;) + { + j = dspbase[state] + (int)tolowertab[*p]; + + // Reject, character doesn't match + if (dspcheck[j] != state) + { + state = -1; // No match + break; + } + + // Must accept or reject at EOS + if (!*++p) + { + state = dspaccept[j]; // (-1 on no terminal match) + break; + } + + state = dsptab[j]; + } + + // Call DSP code generator if we found a mnemonic + if (state >= 2000) + { + LONG parcode; + int operands; + MNTABDSP * md = &dsp56k_machtab[state - 2000]; + deposit_extra_ea = 0; // Assume no extra word needed + + if (md->mnfunc == dsp_mult) + { + // Special case for multiplication instructions: they require + // 3 operands + if ((operands = dsp_amode(3)) == ERROR) + goto loop; + } + else if ((md->mnattr & PARMOVE) && md->mn0 != M_AM_NONE) + { + if (dsp_amode(2) == ERROR) + goto loop; + } + else if ((md->mnattr & PARMOVE) && md->mn0 == M_AM_NONE) + { + // Instructions that have parallel moves but use no operands + // (probably only move). In this case, don't parse addressing + // modes--just go straight to parallel parse + dsp_am0 = dsp_am1 = M_AM_NONE; + } + else + { + // Non parallel move instructions can have up to 4 parameters + // (well, only tcc instructions really) + if ((operands = dsp_amode(4)) == ERROR) + goto loop; + + if (operands == 4) + { + dsp_tcc4(md->mninst); + goto loop; + } + } + + if (md->mnattr & PARMOVE) + { + // Check for parallel moves + if ((parcode = parmoves(dsp_a1reg)) == ERROR) + goto loop; + } + else + { + if (*tok != EOL) + error("parallel moves not allowed with this instruction"); + + parcode = 0; + } + + while ((dsp_am0 & md->mn0) == 0 || (dsp_am1 & md->mn1) == 0) + md = &dsp56k_machtab[md->mncont]; + + (*md->mnfunc)(md->mninst | (parcode << 8)); + goto loop; + } + } + + // Invoke macro or complain about bad mnemonic + if (state < 0) + { + if ((sy = lookup(opname, MACRO, 0)) != NULL) + InvokeMacro(sy, siz); + else + error("unknown op '%s'", opname); + + goto loop; + } + + // Call directive handlers + if (state < 500) + { + (*dirtab[state])(siz); + goto loop; + } + + // Do mnemonics + // o can't deposit instrs in BSS or ABS + // o do automatic .EVEN for instrs + // o allocate space for largest possible instr + // o can't do ".b" operations with an address register + if (scattr & SBSS) + { + error("cannot initialize non-storage (BSS) section"); + goto loop; + } + + if (sloc & 1) // Automatic .even + auto_even(); + + if (challoc - ch_size < 18) // Make sure have space in current chunk + chcheck(0); + + m = &machtab[state - 1000]; + + // Call special-mode handler + if (m->mnattr & CGSPECIAL) + { + (*m->mnfunc)(m->mninst, siz); + goto loop; + } + + if (amode(1) < 0) // Parse 0, 1 or 2 addr modes + goto loop; + + if (*tok != EOL) + error(extra_stuff); + + amsk0 = amsktab[am0]; + amsk1 = amsktab[am1]; + + // Catch attempts to use ".B" with an address register (yes, this check + // does work at this level) + if (siz == SIZB && (am0 == AREG || am1 == AREG)) + { + error("cannot use '.b' with an address register"); + goto loop; + } + + // Keep a backup of chptr (used for optimisations during codegen) + chptr_opcode = chptr; + + while (!(m->mnattr & siz) || (amsk0 & m->mn0) == 0 || (amsk1 & m->mn1) == 0) + m = &machtab[m->mncont]; + + 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); } + + (*m->mnfunc)(m->mninst, siz); + goto loop; +} -int d_endif(void) { - IFENT *rif; - - rif = ifent; - if(rif->if_prev == NULL) return(error("mismatched .endif")); - ifent = rif->if_prev; - disabled = rif->if_prev->if_state; - rif->if_prev = f_ifent; - f_ifent = rif; - return(0); +// +// Handle the creation of labels +// +int HandleLabel(char * label, int labelType) +{ + // Check for dot in front of label; means this is a local label if present + int environment = (*label == '.' ? curenv : 0); + SYM * symbol = lookup(label, LABEL, environment); + + if (symbol == NULL) + { + symbol = NewSymbol(label, LABEL, environment); + symbol->sattr = 0; + symbol->sattre = 0; + } + else if (symbol->sattr & DEFINED) + return error("multiply-defined label '%s'", label); + + // Put symbol in "order of definition" list if it's not already in it + AddToSymbolDeclarationList(symbol); + + if (orgactive) + { + symbol->svalue = orgaddr; + symbol->sattr |= ABS | DEFINED | EQUATED; + } + else + { + symbol->svalue = sloc; + symbol->sattr |= DEFINED | cursect; + } + + lab_sym = symbol; + + // Yes, our CS professors told us to write checks for equality this way, + // but damn, it hurts my brain every time I look at it. :-/ + if (0 == environment) + curenv++; + + // Make label global if it has a double colon + if (labelType == DCOLON) + { + if (environment != 0) + return error(locgl_error); + + symbol->sattr |= GLOBAL; + } + + return 0; }