Annotation of gforth/prim, revision 1.142

1.1       anton       1: \ Gforth primitives
                      2: 
1.126     anton       3: \ Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc.
1.1       anton       4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
1.63      anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       anton      20: 
                     21: 
                     22: \ WARNING: This file is processed by m4. Make sure your identifiers
                     23: \ don't collide with m4's (e.g. by undefining them).
                     24: \ 
                     25: \ 
                     26: \ 
                     27: \ This file contains primitive specifications in the following format:
                     28: \ 
1.47      anton      29: \ forth name   ( stack effect )        category        [pronunciation]
1.1       anton      30: \ [""glossary entry""]
                     31: \ C code
                     32: \ [:
                     33: \ Forth code]
                     34: \ 
1.47      anton      35: \ Note: Fields in brackets are optional.  Word specifications have to
                     36: \ be separated by at least one empty line
1.1       anton      37: \
                     38: \ Both pronounciation and stack items (in the stack effect) must
1.48      anton      39: \ conform to the C identifier syntax or the C compiler will complain.
                     40: \ If you don't have a pronounciation field, the Forth name is used,
                     41: \ and has to conform to the C identifier syntax.
1.1       anton      42: \ 
                     43: \ These specifications are automatically translated into C-code for the
                     44: \ interpreter and into some other files. I hope that your C compiler has
                     45: \ decent optimization, otherwise the automatically generated code will
                     46: \ be somewhat slow. The Forth version of the code is included for manual
                     47: \ compilers, so they will need to compile only the important words.
                     48: \ 
                     49: \ Note that stack pointer adjustment is performed according to stack
                     50: \ effect by automatically generated code and NEXT is automatically
                     51: \ appended to the C code. Also, you can use the names in the stack
                     52: \ effect in the C code. Stack access is automatic. One exception: if
                     53: \ your code does not fall through, the results are not stored into the
                     54: \ stack. Use different names on both sides of the '--', if you change a
                     55: \ value (some stores to the stack are optimized away).
1.93      anton      56: \
                     57: \ For superinstructions the syntax is:
                     58: \
                     59: \ forth-name [/ c-name] = forth-name forth-name ...
                     60: \
1.1       anton      61: \ 
                     62: \ The stack variables have the following types:
                     63: \ 
                     64: \ name matches type
                     65: \ f.*          Bool
                     66: \ c.*          Char
1.93      anton      67: \ [nw].*       Cell
1.1       anton      68: \ u.*          UCell
                     69: \ d.*          DCell
                     70: \ ud.*         UDCell
                     71: \ r.*          Float
                     72: \ a_.*         Cell *
                     73: \ c_.*         Char *
                     74: \ f_.*         Float *
                     75: \ df_.*                DFloat *
                     76: \ sf_.*                SFloat *
                     77: \ xt.*         XT
                     78: \ f83name.*    F83Name *
1.67      anton      79: 
1.79      anton      80: \E stack data-stack   sp Cell
                     81: \E stack fp-stack     fp Float
                     82: \E stack return-stack rp Cell
                     83: \E
1.67      anton      84: \E get-current prefixes set-current
                     85: \E 
                     86: \E s" Bool"            single data-stack type-prefix f
                     87: \E s" Char"            single data-stack type-prefix c
                     88: \E s" Cell"            single data-stack type-prefix n
                     89: \E s" Cell"            single data-stack type-prefix w
                     90: \E s" UCell"           single data-stack type-prefix u
                     91: \E s" DCell"           double data-stack type-prefix d
                     92: \E s" UDCell"          double data-stack type-prefix ud
                     93: \E s" Float"           single fp-stack   type-prefix r
                     94: \E s" Cell *"          single data-stack type-prefix a_
                     95: \E s" Char *"          single data-stack type-prefix c_
                     96: \E s" Float *"         single data-stack type-prefix f_
                     97: \E s" DFloat *"                single data-stack type-prefix df_
                     98: \E s" SFloat *"                single data-stack type-prefix sf_
                     99: \E s" Xt"              single data-stack type-prefix xt
                    100: \E s" struct F83Name *"        single data-stack type-prefix f83name
1.71      anton     101: \E s" struct Longname *" single data-stack type-prefix longname
1.67      anton     102: \E 
                    103: \E return-stack stack-prefix R:
                    104: \E inst-stream  stack-prefix #
                    105: \E 
                    106: \E set-current
1.97      anton     107: \E store-optimization on
1.109     anton     108: \E ' noop tail-nextp2 ! \ now INST_TAIL just stores, but does not jump
1.128     anton     109: \E
                    110: \E include-skipped-insts on \ static superinsts include cells for components
                    111: \E                          \ useful for dynamic programming and
                    112: \E                          \ superinsts across entry points
1.67      anton     113: 
1.1       anton     114: \ 
                    115: \ 
                    116: \ 
                    117: \ In addition the following names can be used:
                    118: \ ip   the instruction pointer
                    119: \ sp   the data stack pointer
                    120: \ rp   the parameter stack pointer
                    121: \ lp   the locals stack pointer
                    122: \ NEXT executes NEXT
                    123: \ cfa  
                    124: \ NEXT1        executes NEXT1
                    125: \ FLAG(x)      makes a Forth flag from a C flag
                    126: \ 
                    127: \ 
                    128: \ 
                    129: \ Percentages in comments are from Koopmans book: average/maximum use
                    130: \ (taken from four, not very representative benchmarks)
                    131: \ 
                    132: \ 
                    133: \ 
                    134: \ To do:
                    135: \ 
                    136: \ throw execute, cfa and NEXT1 out?
                    137: \ macroize *ip, ip++, *ip++ (pipelining)?
                    138: 
                    139: \ these m4 macros would collide with identifiers
                    140: undefine(`index')
                    141: undefine(`shift')
1.78      pazsan    142: undefine(`symbols')
1.1       anton     143: 
1.140     anton     144: \F 0 [if]
                    145: 
1.139     anton     146: \ run-time routines for non-primitives.  They are defined as
                    147: \ primitives, because that simplifies things.
                    148: 
                    149: (docol)        ( -- R:a_retaddr )      gforth-internal paren_docol
                    150: ""run-time routine for colon definitions""
1.141     anton     151: a_retaddr = (Cell *)IP;
1.139     anton     152: SET_IP((Xt *)PFA(CFA));
                    153: 
                    154: (docon) ( -- w )       gforth-internal paren_docon
                    155: ""run-time routine for constants""
                    156: w = *(Cell *)PFA(CFA);
                    157: 
                    158: (dovar) ( -- a_body )  gforth-internal paren_dovar
                    159: ""run-time routine for variables and CREATEd words""
                    160: a_body = PFA(CFA);
                    161: 
                    162: (douser) ( -- a_user ) gforth-internal paren_douser
                    163: ""run-time routine for constants""
                    164: a_user = (Cell *)(up+*(Cell *)PFA(CFA));
                    165: 
                    166: (dodefer) ( -- )       gforth-internal paren_dodefer
                    167: ""run-time routine for deferred words""
1.141     anton     168: ip=IP; /* undo any ip updating that may have been performed by NEXT_P0 */
                    169: SUPER_END; /* !! probably unnecessary and may lead to measurement errors */
1.139     anton     170: EXEC(*(Xt *)PFA(CFA));
                    171: 
                    172: (dofield) ( n1 -- n2 ) gforth-internal paren_field
                    173: ""run-time routine for fields""
                    174: n2 = n1 + *(Cell *)PFA(CFA);
                    175: 
                    176: (dodoes) ( -- a_body R:a_retaddr )     gforth-internal paren_dodoes
                    177: ""run-time routine for @code{does>}-defined words""
1.141     anton     178: a_retaddr = (Cell *)IP;
1.139     anton     179: a_body = PFA(CFA);
                    180: SET_IP(DOES_CODE1(CFA));
                    181: 
                    182: (does-handler) ( -- )  gforth-internal paren_does_handler
                    183: ""just a slot to have an encoding for the DOESJUMP, 
                    184: which is no longer used anyway (!! eliminate this)""
1.140     anton     185: 
                    186: \F [endif]
1.139     anton     187: 
1.83      pazsan    188: \g control
                    189: 
1.47      anton     190: noop   ( -- )          gforth
1.1       anton     191: :
                    192:  ;
                    193: 
1.112     pazsan    194: call   ( #a_callee -- R:a_retaddr )    new
                    195: ""Call callee (a variant of docol with inline argument).""
                    196: #ifdef NO_IP
                    197: INST_TAIL;
                    198: JUMP(a_callee);
                    199: #else
                    200: #ifdef DEBUG
                    201:     {
                    202:       CFA_TO_NAME((((Cell *)a_callee)-2));
                    203:       fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
                    204:              len,name);
                    205:     }
                    206: #endif
                    207: a_retaddr = (Cell *)IP;
                    208: SET_IP((Xt *)a_callee);
                    209: #endif
1.1       anton     210: 
1.47      anton     211: execute        ( xt -- )               core
1.29      crook     212: ""Perform the semantics represented by the execution token, @i{xt}.""
1.102     anton     213: #ifndef NO_IP
1.1       anton     214: ip=IP;
1.102     anton     215: #endif
1.64      anton     216: IF_spTOS(spTOS = sp[0]);
1.76      anton     217: SUPER_END;
1.1       anton     218: EXEC(xt);
                    219: 
1.47      anton     220: perform        ( a_addr -- )   gforth
1.55      anton     221: ""@code{@@ execute}.""
1.1       anton     222: /* and pfe */
1.102     anton     223: #ifndef NO_IP
1.1       anton     224: ip=IP;
1.102     anton     225: #endif
1.64      anton     226: IF_spTOS(spTOS = sp[0]);
1.76      anton     227: SUPER_END;
1.1       anton     228: EXEC(*(Xt *)a_addr);
                    229: :
                    230:  @ execute ;
                    231: 
1.112     pazsan    232: ;s     ( R:w -- )              gforth  semis
                    233: ""The primitive compiled by @code{EXIT}.""
                    234: #ifdef NO_IP
                    235: INST_TAIL;
                    236: goto *(void *)w;
                    237: #else
                    238: SET_IP((Xt *)w);
                    239: #endif
                    240: 
                    241: unloop ( R:w1 R:w2 -- )        core
                    242: /* !! alias for 2rdrop */
                    243: :
                    244:  r> rdrop rdrop >r ;
                    245: 
                    246: lit-perform    ( #a_addr -- )  new     lit_perform
                    247: #ifndef NO_IP
                    248: ip=IP;
                    249: #endif
                    250: SUPER_END;
                    251: EXEC(*(Xt *)a_addr);
                    252: 
                    253: does-exec ( #a_cfa -- R:nest a_pfa )   new     does_exec
                    254: #ifdef NO_IP
                    255: /* compiled to LIT CALL by compile_prim */
                    256: assert(0);
                    257: #else
                    258: a_pfa = PFA(a_cfa);
                    259: nest = (Cell)IP;
                    260: IF_spTOS(spTOS = sp[0]);
                    261: #ifdef DEBUG
                    262:     {
                    263:       CFA_TO_NAME(a_cfa);
                    264:       fprintf(stderr,"%08lx: does %08lx %.*s\n",
                    265:              (Cell)ip,(Cell)a_cfa,len,name);
                    266:     }
                    267: #endif
                    268: SET_IP(DOES_CODE1(a_cfa));
                    269: #endif
                    270: 
1.15      pazsan    271: \+glocals
1.1       anton     272: 
1.112     pazsan    273: branch-lp+!# ( #a_target #nlocals -- ) gforth  branch_lp_plus_store_number
1.1       anton     274: /* this will probably not be used */
1.68      anton     275: lp += nlocals;
1.112     pazsan    276: #ifdef NO_IP
                    277: INST_TAIL;
                    278: JUMP(a_target);
                    279: #else
                    280: SET_IP((Xt *)a_target);
                    281: #endif
1.1       anton     282: 
1.15      pazsan    283: \+
1.1       anton     284: 
1.112     pazsan    285: branch ( #a_target -- )        gforth
                    286: #ifdef NO_IP
                    287: INST_TAIL;
                    288: JUMP(a_target);
                    289: #else
                    290: SET_IP((Xt *)a_target);
                    291: #endif
1.1       anton     292: :
1.112     pazsan    293:  r> @ >r ;
1.1       anton     294: 
1.112     pazsan    295: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
1.1       anton     296: \ this is non-syntactical: code must open a brace that is closed by the macro
                    297: define(condbranch,
1.112     pazsan    298: $1 ( `#'a_target $2 ) $3
                    299: $4     #ifdef NO_IP
1.96      anton     300: INST_TAIL;
1.112     pazsan    301: #endif
                    302: $5     #ifdef NO_IP
                    303: JUMP(a_target);
                    304: #else
                    305: SET_IP((Xt *)a_target);
                    306: INST_TAIL; NEXT_P2;
                    307: #endif
1.1       anton     308: }
1.87      anton     309: SUPER_CONTINUE;
1.112     pazsan    310: $6
1.1       anton     311: 
1.15      pazsan    312: \+glocals
1.1       anton     313: 
1.112     pazsan    314: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
                    315: $4     #ifdef NO_IP
1.96      anton     316: INST_TAIL;
1.112     pazsan    317: #endif
                    318: $5     lp += nlocals;
                    319: #ifdef NO_IP
                    320: JUMP(a_target);
                    321: #else
                    322: SET_IP((Xt *)a_target);
                    323: INST_TAIL; NEXT_P2;
                    324: #endif
1.1       anton     325: }
1.87      anton     326: SUPER_CONTINUE;
1.1       anton     327: 
1.15      pazsan    328: \+
1.1       anton     329: )
                    330: 
1.68      anton     331: condbranch(?branch,f --,f83    question_branch,
1.112     pazsan    332: ,if (f==0) {
1.5       jwilke    333: ,:
1.112     pazsan    334:  0= dup 0=          \ !f f
                    335:  r> tuck cell+      \ !f branchoffset f IP+
                    336:  and -rot @ and or  \ f&IP+|!f&branch
1.5       jwilke    337:  >r ;)
1.1       anton     338: 
                    339: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
                    340: \ is only used in if's (yet)
                    341: 
1.15      pazsan    342: \+xconds
1.1       anton     343: 
1.112     pazsan    344: ?dup-?branch   ( #a_target f -- f )    new     question_dupe_question_branch
1.1       anton     345: ""The run-time procedure compiled by @code{?DUP-IF}.""
                    346: if (f==0) {
                    347:   sp++;
1.64      anton     348:   IF_spTOS(spTOS = sp[0]);
1.112     pazsan    349: #ifdef NO_IP
                    350: INST_TAIL;
                    351: JUMP(a_target);
                    352: #else
                    353: SET_IP((Xt *)a_target);
                    354:   INST_TAIL; NEXT_P2;
                    355: #endif
1.1       anton     356: }
1.87      anton     357: SUPER_CONTINUE;
1.1       anton     358: 
1.112     pazsan    359: ?dup-0=-?branch ( #a_target f -- ) new question_dupe_zero_equals_question_branch
1.1       anton     360: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
                    361: /* the approach taken here of declaring the word as having the stack
                    362: effect ( f -- ) and correcting for it in the branch-taken case costs a
                    363: few cycles in that case, but is easy to convert to a CONDBRANCH
                    364: invocation */
                    365: if (f!=0) {
                    366:   sp--;
1.112     pazsan    367: #ifdef NO_IP
                    368:   JUMP(a_target);
                    369: #else
                    370:   SET_IP((Xt *)a_target);
1.1       anton     371:   NEXT;
1.112     pazsan    372: #endif
1.1       anton     373: }
1.87      anton     374: SUPER_CONTINUE;
1.1       anton     375: 
1.15      pazsan    376: \+
1.31      jwilke    377: \fhas? skiploopprims 0= [IF]
1.1       anton     378: 
1.68      anton     379: condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
1.65      anton     380: n2=n1-1;
1.112     pazsan    381: ,if (n1) {
1.1       anton     382: ,:
                    383:  r> r> dup 1- >r
1.112     pazsan    384:  IF @ >r ELSE cell+ >r THEN ;)
1.1       anton     385: 
1.68      anton     386: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth        paren_loop,
1.65      anton     387: n2=n1+1;
1.112     pazsan    388: ,if (n2 != nlimit) {
1.1       anton     389: ,:
                    390:  r> r> 1+ r> 2dup =
                    391:  IF >r 1- >r cell+ >r
1.112     pazsan    392:  ELSE >r >r @ >r THEN ;)
1.1       anton     393: 
1.68      anton     394: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
1.1       anton     395: /* !! check this thoroughly */
                    396: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
                    397: /* dependent upon two's complement arithmetic */
1.65      anton     398: Cell olddiff = n1-nlimit;
                    399: n2=n1+n;       
1.112     pazsan    400: ,if ((olddiff^(olddiff+n))>=0   /* the limit is not crossed */
1.1       anton     401:     || (olddiff^n)>=0          /* it is a wrap-around effect */) {
                    402: ,:
                    403:  r> swap
                    404:  r> r> 2dup - >r
                    405:  2 pick r@ + r@ xor 0< 0=
                    406:  3 pick r> xor 0< 0= or
1.112     pazsan    407:  IF    >r + >r @ >r
1.1       anton     408:  ELSE  >r >r drop cell+ >r THEN ;)
                    409: 
1.15      pazsan    410: \+xconds
1.1       anton     411: 
1.68      anton     412: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
1.65      anton     413: UCell olddiff = n1-nlimit;
                    414: n2=n1-u;
1.112     pazsan    415: ,if (olddiff>u) {
1.1       anton     416: ,)
                    417: 
1.68      anton     418: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth    paren_symmetric_plus_loop,
1.1       anton     419: ""The run-time procedure compiled by S+LOOP. It loops until the index
                    420: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
                    421: version of (+LOOP).""
                    422: /* !! check this thoroughly */
1.65      anton     423: Cell diff = n1-nlimit;
1.1       anton     424: Cell newdiff = diff+n;
                    425: if (n<0) {
                    426:     diff = -diff;
                    427:     newdiff = -newdiff;
                    428: }
1.65      anton     429: n2=n1+n;
1.112     pazsan    430: ,if (diff>=0 || newdiff<0) {
1.1       anton     431: ,)
                    432: 
1.15      pazsan    433: \+
1.1       anton     434: 
1.112     pazsan    435: (for)   ( ncount -- R:nlimit R:ncount )         cmFORTH         paren_for
1.1       anton     436: /* or (for) = >r -- collides with unloop! */
1.65      anton     437: nlimit=0;
1.1       anton     438: :
                    439:  r> swap 0 >r >r >r ;
                    440: 
1.112     pazsan    441: (do)    ( nlimit nstart -- R:nlimit R:nstart )  gforth          paren_do
1.1       anton     442: :
                    443:  r> swap rot >r >r >r ;
                    444: 
1.112     pazsan    445: (?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth  paren_question_do
                    446: #ifdef NO_IP
                    447:     INST_TAIL;
                    448: #endif
1.1       anton     449: if (nstart == nlimit) {
1.112     pazsan    450: #ifdef NO_IP
                    451:     JUMP(a_target);
                    452: #else
                    453:     SET_IP((Xt *)a_target);
                    454:     INST_TAIL; NEXT_P2;
                    455: #endif
1.1       anton     456: }
1.87      anton     457: SUPER_CONTINUE;
1.1       anton     458: :
                    459:   2dup =
                    460:   IF   r> swap rot >r >r
1.112     pazsan    461:        @ >r
1.1       anton     462:   ELSE r> swap rot >r >r
                    463:        cell+ >r
                    464:   THEN ;                               \ --> CORE-EXT
                    465: 
1.15      pazsan    466: \+xconds
1.1       anton     467: 
1.112     pazsan    468: (+do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
                    469: #ifdef NO_IP
                    470:     INST_TAIL;
                    471: #endif
1.1       anton     472: if (nstart >= nlimit) {
1.112     pazsan    473: #ifdef NO_IP
                    474:     JUMP(a_target);
                    475: #else
                    476:     SET_IP((Xt *)a_target);
                    477:     INST_TAIL; NEXT_P2;
                    478: #endif
1.1       anton     479: }
1.87      anton     480: SUPER_CONTINUE;
1.1       anton     481: :
                    482:  swap 2dup
                    483:  r> swap >r swap >r
                    484:  >=
                    485:  IF
1.112     pazsan    486:      @
1.1       anton     487:  ELSE
                    488:      cell+
                    489:  THEN  >r ;
                    490: 
1.112     pazsan    491: (u+do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
                    492: #ifdef NO_IP
                    493:     INST_TAIL;
                    494: #endif
1.1       anton     495: if (ustart >= ulimit) {
1.112     pazsan    496: #ifdef NO_IP
                    497: JUMP(a_target);
                    498: #else
                    499: SET_IP((Xt *)a_target);
                    500: INST_TAIL; NEXT_P2;
                    501: #endif
1.1       anton     502: }
1.87      anton     503: SUPER_CONTINUE;
1.1       anton     504: :
                    505:  swap 2dup
                    506:  r> swap >r swap >r
                    507:  u>=
                    508:  IF
1.112     pazsan    509:      @
1.1       anton     510:  ELSE
                    511:      cell+
                    512:  THEN  >r ;
                    513: 
1.112     pazsan    514: (-do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
                    515: #ifdef NO_IP
                    516:     INST_TAIL;
                    517: #endif
1.1       anton     518: if (nstart <= nlimit) {
1.112     pazsan    519: #ifdef NO_IP
                    520: JUMP(a_target);
                    521: #else
                    522: SET_IP((Xt *)a_target);
                    523: INST_TAIL; NEXT_P2;
                    524: #endif
1.1       anton     525: }
1.87      anton     526: SUPER_CONTINUE;
1.1       anton     527: :
                    528:  swap 2dup
                    529:  r> swap >r swap >r
                    530:  <=
                    531:  IF
1.112     pazsan    532:      @
1.1       anton     533:  ELSE
                    534:      cell+
                    535:  THEN  >r ;
                    536: 
1.112     pazsan    537: (u-do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
                    538: #ifdef NO_IP
                    539:     INST_TAIL;
                    540: #endif
1.1       anton     541: if (ustart <= ulimit) {
1.112     pazsan    542: #ifdef NO_IP
                    543: JUMP(a_target);
                    544: #else
                    545: SET_IP((Xt *)a_target);
                    546: INST_TAIL; NEXT_P2;
                    547: #endif
1.1       anton     548: }
1.87      anton     549: SUPER_CONTINUE;
1.1       anton     550: :
                    551:  swap 2dup
                    552:  r> swap >r swap >r
                    553:  u<=
                    554:  IF
1.112     pazsan    555:      @
1.1       anton     556:  ELSE
                    557:      cell+
                    558:  THEN  >r ;
                    559: 
1.15      pazsan    560: \+
1.1       anton     561: 
1.5       jwilke    562: \ don't make any assumptions where the return stack is!!
                    563: \ implement this in machine code if it should run quickly!
                    564: 
1.65      anton     565: i      ( R:n -- R:n n )                core
1.1       anton     566: :
1.5       jwilke    567: \ rp@ cell+ @ ;
                    568:   r> r> tuck >r >r ;
1.1       anton     569: 
1.65      anton     570: i'     ( R:w R:w2 -- R:w R:w2 w )              gforth          i_tick
1.1       anton     571: :
1.5       jwilke    572: \ rp@ cell+ cell+ @ ;
                    573:   r> r> r> dup itmp ! >r >r >r itmp @ ;
                    574: variable itmp
1.1       anton     575: 
1.65      anton     576: j      ( R:n R:d1 -- n R:n R:d1 )              core
1.1       anton     577: :
1.5       jwilke    578: \ rp@ cell+ cell+ cell+ @ ;
                    579:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
                    580: [IFUNDEF] itmp variable itmp [THEN]
1.1       anton     581: 
1.65      anton     582: k      ( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 )            gforth
1.1       anton     583: :
1.5       jwilke    584: \ rp@ [ 5 cells ] Literal + @ ;
                    585:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
                    586: [IFUNDEF] itmp variable itmp [THEN]
1.31      jwilke    587: 
                    588: \f[THEN]
1.1       anton     589: 
                    590: \ digit is high-level: 0/0%
                    591: 
1.83      pazsan    592: \g strings
                    593: 
1.47      anton     594: move   ( c_from c_to ucount -- )               core
1.52      anton     595: ""Copy the contents of @i{ucount} aus at @i{c-from} to
1.33      anton     596: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
1.52      anton     597: /* !! note that the standard specifies addr, not c-addr */
1.1       anton     598: memmove(c_to,c_from,ucount);
                    599: /* make an Ifdef for bsd and others? */
                    600: :
                    601:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
                    602: 
1.47      anton     603: cmove  ( c_from c_to u -- )    string  c_move
1.33      anton     604: ""Copy the contents of @i{ucount} characters from data space at
                    605: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    606: from low address to high address; i.e., for overlapping areas it is
                    607: safe if @i{c-to}=<@i{c-from}.""
1.125     anton     608: cmove(c_from,c_to,u);
1.1       anton     609: :
                    610:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
                    611: 
1.47      anton     612: cmove> ( c_from c_to u -- )    string  c_move_up
1.33      anton     613: ""Copy the contents of @i{ucount} characters from data space at
                    614: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    615: from high address to low address; i.e., for overlapping areas it is
                    616: safe if @i{c-to}>=@i{c-from}.""
1.125     anton     617: cmove_up(c_from,c_to,u);
1.1       anton     618: :
                    619:  dup 0= IF  drop 2drop exit  THEN
                    620:  rot over + -rot bounds swap 1-
                    621:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
                    622: 
1.47      anton     623: fill   ( c_addr u c -- )       core
1.52      anton     624: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
1.1       anton     625: memset(c_addr,c,u);
                    626: :
                    627:  -rot bounds
                    628:  ?DO  dup I c!  LOOP  drop ;
                    629: 
1.47      anton     630: compare        ( c_addr1 u1 c_addr2 u2 -- n )  string
1.29      crook     631: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    632: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
1.1       anton     633: is 1. Currently this is based on the machine's character
1.26      crook     634: comparison. In the future, this may change to consider the current
1.1       anton     635: locale and its collation order.""
1.46      pazsan    636: /* close ' to keep fontify happy */ 
1.125     anton     637: n = compare(c_addr1, u1, c_addr2, u2);
1.1       anton     638: :
1.43      pazsan    639:  rot 2dup swap - >r min swap -text dup
                    640:  IF  rdrop  ELSE  drop r> sgn  THEN ;
                    641: : sgn ( n -- -1/0/1 )
                    642:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     643: 
1.125     anton     644: \ -text is only used by replaced primitives now; move it elsewhere
                    645: \ -text        ( c_addr1 u c_addr2 -- n )      new     dash_text
                    646: \ n = memcmp(c_addr1, c_addr2, u);
                    647: \ if (n<0)
                    648: \   n = -1;
                    649: \ else if (n>0)
                    650: \   n = 1;
                    651: \ :
                    652: \  swap bounds
                    653: \  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    654: \  ELSE  c@ I c@ - unloop  THEN  sgn ;
                    655: \ : sgn ( n -- -1/0/1 )
                    656: \  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     657: 
1.47      anton     658: toupper        ( c1 -- c2 )    gforth
1.29      crook     659: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
1.25      anton     660: is the equivalent upper-case character. All other characters are unchanged.""
1.1       anton     661: c2 = toupper(c1);
                    662: :
                    663:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
                    664: 
1.47      anton     665: /string        ( c_addr1 u1 n -- c_addr2 u2 )  string  slash_string
1.29      crook     666: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
1.27      crook     667: characters from the start of the string.""
1.1       anton     668: c_addr2 = c_addr1+n;
                    669: u2 = u1-n;
                    670: :
                    671:  tuck - >r + r> dup 0< IF  - 0  THEN ;
                    672: 
1.83      pazsan    673: \g arith
                    674: 
1.112     pazsan    675: lit    ( #w -- w )             gforth
                    676: :
                    677:  r> dup @ swap cell+ >r ;
                    678: 
1.47      anton     679: +      ( n1 n2 -- n )          core    plus
1.1       anton     680: n = n1+n2;
                    681: 
1.112     pazsan    682: \ lit+ / lit_plus = lit +
                    683: 
                    684: lit+   ( n1 #n2 -- n )         new     lit_plus
                    685: n=n1+n2;
                    686: 
1.1       anton     687: \ PFE-0.9.14 has it differently, but the next release will have it as follows
1.47      anton     688: under+ ( n1 n2 n3 -- n n2 )    gforth  under_plus
1.29      crook     689: ""add @i{n3} to @i{n1} (giving @i{n})""
1.1       anton     690: n = n1+n3;
                    691: :
                    692:  rot + swap ;
                    693: 
1.47      anton     694: -      ( n1 n2 -- n )          core    minus
1.1       anton     695: n = n1-n2;
                    696: :
                    697:  negate + ;
                    698: 
1.47      anton     699: negate ( n1 -- n2 )            core
1.1       anton     700: /* use minus as alias */
                    701: n2 = -n1;
                    702: :
                    703:  invert 1+ ;
                    704: 
1.47      anton     705: 1+     ( n1 -- n2 )            core            one_plus
1.1       anton     706: n2 = n1+1;
                    707: :
                    708:  1 + ;
                    709: 
1.47      anton     710: 1-     ( n1 -- n2 )            core            one_minus
1.1       anton     711: n2 = n1-1;
                    712: :
                    713:  1 - ;
                    714: 
1.47      anton     715: max    ( n1 n2 -- n )  core
1.1       anton     716: if (n1<n2)
                    717:   n = n2;
                    718: else
                    719:   n = n1;
                    720: :
                    721:  2dup < IF swap THEN drop ;
                    722: 
1.47      anton     723: min    ( n1 n2 -- n )  core
1.1       anton     724: if (n1<n2)
                    725:   n = n1;
                    726: else
                    727:   n = n2;
                    728: :
                    729:  2dup > IF swap THEN drop ;
                    730: 
1.52      anton     731: abs    ( n -- u )      core
                    732: if (n<0)
                    733:   u = -n;
1.1       anton     734: else
1.52      anton     735:   u = n;
1.1       anton     736: :
                    737:  dup 0< IF negate THEN ;
                    738: 
1.47      anton     739: *      ( n1 n2 -- n )          core    star
1.1       anton     740: n = n1*n2;
                    741: :
                    742:  um* drop ;
                    743: 
1.47      anton     744: /      ( n1 n2 -- n )          core    slash
1.1       anton     745: n = n1/n2;
                    746: :
                    747:  /mod nip ;
                    748: 
1.47      anton     749: mod    ( n1 n2 -- n )          core
1.1       anton     750: n = n1%n2;
                    751: :
                    752:  /mod drop ;
                    753: 
1.47      anton     754: /mod   ( n1 n2 -- n3 n4 )              core            slash_mod
1.1       anton     755: n4 = n1/n2;
                    756: n3 = n1%n2; /* !! is this correct? look into C standard! */
                    757: :
                    758:  >r s>d r> fm/mod ;
                    759: 
1.47      anton     760: 2*     ( n1 -- n2 )            core            two_star
1.52      anton     761: ""Shift left by 1; also works on unsigned numbers""
1.1       anton     762: n2 = 2*n1;
                    763: :
                    764:  dup + ;
                    765: 
1.47      anton     766: 2/     ( n1 -- n2 )            core            two_slash
1.52      anton     767: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                    768: division by 2 (note that @code{/} not necessarily floors).""
1.1       anton     769: n2 = n1>>1;
                    770: :
                    771:  dup MINI and IF 1 ELSE 0 THEN
                    772:  [ bits/byte cell * 1- ] literal 
1.5       jwilke    773:  0 DO 2* swap dup 2* >r MINI and 
1.1       anton     774:      IF 1 ELSE 0 THEN or r> swap
                    775:  LOOP nip ;
                    776: 
1.47      anton     777: fm/mod ( d1 n1 -- n2 n3 )              core            f_m_slash_mod
1.29      crook     778: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
1.1       anton     779: #ifdef BUGGY_LONG_LONG
                    780: DCell r = fmdiv(d1,n1);
                    781: n2=r.hi;
                    782: n3=r.lo;
                    783: #else
                    784: /* assumes that the processor uses either floored or symmetric division */
                    785: n3 = d1/n1;
                    786: n2 = d1%n1;
                    787: /* note that this 1%-3>0 is optimized by the compiler */
                    788: if (1%-3>0 && (d1<0) != (n1<0) && n2!=0) {
                    789:   n3--;
                    790:   n2+=n1;
                    791: }
                    792: #endif
                    793: :
                    794:  dup >r dup 0< IF  negate >r dnegate r>  THEN
                    795:  over       0< IF  tuck + swap  THEN
                    796:  um/mod
                    797:  r> 0< IF  swap negate swap  THEN ;
                    798: 
1.47      anton     799: sm/rem ( d1 n1 -- n2 n3 )              core            s_m_slash_rem
1.29      crook     800: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
1.1       anton     801: #ifdef BUGGY_LONG_LONG
                    802: DCell r = smdiv(d1,n1);
                    803: n2=r.hi;
                    804: n3=r.lo;
                    805: #else
                    806: /* assumes that the processor uses either floored or symmetric division */
                    807: n3 = d1/n1;
                    808: n2 = d1%n1;
                    809: /* note that this 1%-3<0 is optimized by the compiler */
                    810: if (1%-3<0 && (d1<0) != (n1<0) && n2!=0) {
                    811:   n3++;
                    812:   n2-=n1;
                    813: }
                    814: #endif
                    815: :
                    816:  over >r dup >r abs -rot
                    817:  dabs rot um/mod
                    818:  r> r@ xor 0< IF       negate       THEN
                    819:  r>        0< IF  swap negate swap  THEN ;
                    820: 
1.47      anton     821: m*     ( n1 n2 -- d )          core    m_star
1.1       anton     822: #ifdef BUGGY_LONG_LONG
                    823: d = mmul(n1,n2);
                    824: #else
                    825: d = (DCell)n1 * (DCell)n2;
                    826: #endif
                    827: :
                    828:  2dup      0< and >r
                    829:  2dup swap 0< and >r
                    830:  um* r> - r> - ;
                    831: 
1.47      anton     832: um*    ( u1 u2 -- ud )         core    u_m_star
1.1       anton     833: /* use u* as alias */
                    834: #ifdef BUGGY_LONG_LONG
                    835: ud = ummul(u1,u2);
                    836: #else
                    837: ud = (UDCell)u1 * (UDCell)u2;
                    838: #endif
                    839: :
1.137     pazsan    840:    0 -rot dup [ 8 cells ] literal -
1.1       anton     841:    DO
1.137     pazsan    842:        dup 0< I' and d2*+ drop
                    843:    LOOP ;
1.1       anton     844: : d2*+ ( ud n -- ud+n c )
                    845:    over MINI
                    846:    and >r >r 2dup d+ swap r> + swap r> ;
                    847: 
1.47      anton     848: um/mod ( ud u1 -- u2 u3 )              core    u_m_slash_mod
1.32      anton     849: ""ud=u3*u1+u2, u1>u2>=0""
1.1       anton     850: #ifdef BUGGY_LONG_LONG
                    851: UDCell r = umdiv(ud,u1);
                    852: u2=r.hi;
                    853: u3=r.lo;
                    854: #else
                    855: u3 = ud/u1;
                    856: u2 = ud%u1;
                    857: #endif
                    858: :
                    859:    0 swap [ 8 cells 1 + ] literal 0
1.5       jwilke    860:    ?DO /modstep
1.1       anton     861:    LOOP drop swap 1 rshift or swap ;
                    862: : /modstep ( ud c R: u -- ud-?u c R: u )
1.5       jwilke    863:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
1.1       anton     864: : d2*+ ( ud n -- ud+n c )
                    865:    over MINI
                    866:    and >r >r 2dup d+ swap r> + swap r> ;
                    867: 
1.47      anton     868: m+     ( d1 n -- d2 )          double          m_plus
1.1       anton     869: #ifdef BUGGY_LONG_LONG
                    870: d2.lo = d1.lo+n;
                    871: d2.hi = d1.hi - (n<0) + (d2.lo<d1.lo);
                    872: #else
                    873: d2 = d1+n;
                    874: #endif
                    875: :
                    876:  s>d d+ ;
                    877: 
1.47      anton     878: d+     ( d1 d2 -- d )          double  d_plus
1.1       anton     879: #ifdef BUGGY_LONG_LONG
                    880: d.lo = d1.lo+d2.lo;
                    881: d.hi = d1.hi + d2.hi + (d.lo<d1.lo);
                    882: #else
                    883: d = d1+d2;
                    884: #endif
                    885: :
                    886:  rot + >r tuck + swap over u> r> swap - ;
                    887: 
1.47      anton     888: d-     ( d1 d2 -- d )          double          d_minus
1.1       anton     889: #ifdef BUGGY_LONG_LONG
                    890: d.lo = d1.lo - d2.lo;
                    891: d.hi = d1.hi-d2.hi-(d1.lo<d2.lo);
                    892: #else
                    893: d = d1-d2;
                    894: #endif
                    895: :
                    896:  dnegate d+ ;
                    897: 
1.47      anton     898: dnegate        ( d1 -- d2 )            double  d_negate
1.1       anton     899: /* use dminus as alias */
                    900: #ifdef BUGGY_LONG_LONG
                    901: d2 = dnegate(d1);
                    902: #else
                    903: d2 = -d1;
                    904: #endif
                    905: :
                    906:  invert swap negate tuck 0= - ;
                    907: 
1.47      anton     908: d2*    ( d1 -- d2 )            double          d_two_star
1.52      anton     909: ""Shift left by 1; also works on unsigned numbers""
1.1       anton     910: #ifdef BUGGY_LONG_LONG
                    911: d2.lo = d1.lo<<1;
                    912: d2.hi = (d1.hi<<1) | (d1.lo>>(CELL_BITS-1));
                    913: #else
                    914: d2 = 2*d1;
                    915: #endif
                    916: :
                    917:  2dup d+ ;
                    918: 
1.47      anton     919: d2/    ( d1 -- d2 )            double          d_two_slash
1.52      anton     920: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                    921: division by 2.""
1.1       anton     922: #ifdef BUGGY_LONG_LONG
                    923: d2.hi = d1.hi>>1;
                    924: d2.lo= (d1.lo>>1) | (d1.hi<<(CELL_BITS-1));
                    925: #else
                    926: d2 = d1>>1;
                    927: #endif
                    928: :
                    929:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
                    930:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
                    931: 
1.47      anton     932: and    ( w1 w2 -- w )          core
1.1       anton     933: w = w1&w2;
                    934: 
1.47      anton     935: or     ( w1 w2 -- w )          core
1.1       anton     936: w = w1|w2;
                    937: :
                    938:  invert swap invert and invert ;
                    939: 
1.47      anton     940: xor    ( w1 w2 -- w )          core    x_or
1.1       anton     941: w = w1^w2;
                    942: 
1.47      anton     943: invert ( w1 -- w2 )            core
1.1       anton     944: w2 = ~w1;
                    945: :
                    946:  MAXU xor ;
                    947: 
1.47      anton     948: rshift ( u1 n -- u2 )          core    r_shift
1.53      anton     949: ""Logical shift right by @i{n} bits.""
1.1       anton     950:   u2 = u1>>n;
                    951: :
                    952:     0 ?DO 2/ MAXI and LOOP ;
                    953: 
1.47      anton     954: lshift ( u1 n -- u2 )          core    l_shift
1.1       anton     955:   u2 = u1<<n;
                    956: :
                    957:     0 ?DO 2* LOOP ;
                    958: 
1.110     pazsan    959: \g compare
                    960: 
1.1       anton     961: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                    962: define(comparisons,
1.47      anton     963: $1=    ( $2 -- f )             $6      $3equals
1.1       anton     964: f = FLAG($4==$5);
                    965: :
                    966:     [ char $1x char 0 = [IF]
                    967:        ] IF false ELSE true THEN [
                    968:     [ELSE]
                    969:        ] xor 0= [
                    970:     [THEN] ] ;
                    971: 
1.47      anton     972: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton     973: f = FLAG($4!=$5);
                    974: :
                    975:     [ char $1x char 0 = [IF]
                    976:        ] IF true ELSE false THEN [
                    977:     [ELSE]
                    978:        ] xor 0<> [
                    979:     [THEN] ] ;
                    980: 
1.47      anton     981: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton     982: f = FLAG($4<$5);
                    983: :
                    984:     [ char $1x char 0 = [IF]
                    985:        ] MINI and 0<> [
                    986:     [ELSE] char $1x char u = [IF]
                    987:        ]   2dup xor 0<  IF nip ELSE - THEN 0<  [
                    988:        [ELSE]
                    989:            ] MINI xor >r MINI xor r> u< [
                    990:        [THEN]
                    991:     [THEN] ] ;
                    992: 
1.47      anton     993: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton     994: f = FLAG($4>$5);
                    995: :
                    996:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                    997:     $1< ;
                    998: 
1.47      anton     999: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton    1000: f = FLAG($4<=$5);
                   1001: :
                   1002:     $1> 0= ;
                   1003: 
1.47      anton    1004: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton    1005: f = FLAG($4>=$5);
                   1006: :
                   1007:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1008:     $1<= ;
                   1009: 
                   1010: )
                   1011: 
                   1012: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
                   1013: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
                   1014: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
                   1015: 
                   1016: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1017: define(dcomparisons,
1.47      anton    1018: $1=    ( $2 -- f )             $6      $3equals
1.1       anton    1019: #ifdef BUGGY_LONG_LONG
                   1020: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
                   1021: #else
                   1022: f = FLAG($4==$5);
                   1023: #endif
                   1024: 
1.47      anton    1025: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton    1026: #ifdef BUGGY_LONG_LONG
                   1027: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
                   1028: #else
                   1029: f = FLAG($4!=$5);
                   1030: #endif
                   1031: 
1.47      anton    1032: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton    1033: #ifdef BUGGY_LONG_LONG
                   1034: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
                   1035: #else
                   1036: f = FLAG($4<$5);
                   1037: #endif
                   1038: 
1.47      anton    1039: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton    1040: #ifdef BUGGY_LONG_LONG
                   1041: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
                   1042: #else
                   1043: f = FLAG($4>$5);
                   1044: #endif
                   1045: 
1.47      anton    1046: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton    1047: #ifdef BUGGY_LONG_LONG
                   1048: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
                   1049: #else
                   1050: f = FLAG($4<=$5);
                   1051: #endif
                   1052: 
1.47      anton    1053: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton    1054: #ifdef BUGGY_LONG_LONG
                   1055: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
                   1056: #else
                   1057: f = FLAG($4>=$5);
                   1058: #endif
                   1059: 
                   1060: )
                   1061: 
1.15      pazsan   1062: \+dcomps
1.1       anton    1063: 
                   1064: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
                   1065: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
                   1066: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
                   1067: 
1.15      pazsan   1068: \+
1.1       anton    1069: 
1.47      anton    1070: within ( u1 u2 u3 -- f )               core-ext
1.32      anton    1071: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
                   1072: unsigned and signed numbers (but not a mixture).  Another way to think
                   1073: about this word is to consider the numbers as a circle (wrapping
                   1074: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
                   1075: min-n for signed numbers); now consider the range from u2 towards
                   1076: increasing numbers up to and excluding u3 (giving an empty range if
1.52      anton    1077: u2=u3); if u1 is in this range, @code{within} returns true.""
1.1       anton    1078: f = FLAG(u1-u2 < u3-u2);
                   1079: :
                   1080:  over - >r - r> u< ;
                   1081: 
1.112     pazsan   1082: \g stack
                   1083: 
                   1084: useraddr       ( #u -- a_addr )        new
                   1085: a_addr = (Cell *)(up+u);
                   1086: 
                   1087: up!    ( a_addr -- )   gforth  up_store
                   1088: UP=up=(char *)a_addr;
                   1089: :
                   1090:  up ! ;
                   1091: Variable UP
                   1092: 
1.47      anton    1093: sp@    ( -- a_addr )           gforth          sp_fetch
1.1       anton    1094: a_addr = sp+1;
                   1095: 
1.47      anton    1096: sp!    ( a_addr -- )           gforth          sp_store
1.1       anton    1097: sp = a_addr;
1.64      anton    1098: /* works with and without spTOS caching */
1.1       anton    1099: 
1.47      anton    1100: rp@    ( -- a_addr )           gforth          rp_fetch
1.1       anton    1101: a_addr = rp;
                   1102: 
1.47      anton    1103: rp!    ( a_addr -- )           gforth          rp_store
1.1       anton    1104: rp = a_addr;
                   1105: 
1.15      pazsan   1106: \+floating
1.1       anton    1107: 
1.47      anton    1108: fp@    ( -- f_addr )   gforth  fp_fetch
1.1       anton    1109: f_addr = fp;
                   1110: 
1.47      anton    1111: fp!    ( f_addr -- )   gforth  fp_store
1.1       anton    1112: fp = f_addr;
                   1113: 
1.15      pazsan   1114: \+
1.1       anton    1115: 
1.65      anton    1116: >r     ( w -- R:w )            core    to_r
1.1       anton    1117: :
                   1118:  (>r) ;
                   1119: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
                   1120: 
1.65      anton    1121: r>     ( R:w -- w )            core    r_from
1.1       anton    1122: :
                   1123:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
                   1124: Create (rdrop) ' ;s A,
                   1125: 
1.65      anton    1126: rdrop  ( R:w -- )              gforth
1.1       anton    1127: :
                   1128:  r> r> drop >r ;
                   1129: 
1.136     pazsan   1130: 2>r    ( d -- R:d )    core-ext        two_to_r
1.1       anton    1131: :
                   1132:  swap r> swap >r swap >r >r ;
                   1133: 
1.136     pazsan   1134: 2r>    ( R:d -- d )    core-ext        two_r_from
1.1       anton    1135: :
                   1136:  r> r> swap r> swap >r swap ;
                   1137: 
1.136     pazsan   1138: 2r@    ( R:d -- R:d d )        core-ext        two_r_fetch
1.1       anton    1139: :
                   1140:  i' j ;
                   1141: 
1.136     pazsan   1142: 2rdrop ( R:d -- )              gforth  two_r_drop
1.1       anton    1143: :
                   1144:  r> r> drop r> drop >r ;
                   1145: 
1.47      anton    1146: over   ( w1 w2 -- w1 w2 w1 )           core
1.1       anton    1147: :
                   1148:  sp@ cell+ @ ;
                   1149: 
1.47      anton    1150: drop   ( w -- )                core
1.1       anton    1151: :
                   1152:  IF THEN ;
                   1153: 
1.47      anton    1154: swap   ( w1 w2 -- w2 w1 )              core
1.1       anton    1155: :
                   1156:  >r (swap) ! r> (swap) @ ;
                   1157: Variable (swap)
                   1158: 
1.47      anton    1159: dup    ( w -- w w )            core    dupe
1.1       anton    1160: :
                   1161:  sp@ @ ;
                   1162: 
1.47      anton    1163: rot    ( w1 w2 w3 -- w2 w3 w1 )        core    rote
1.1       anton    1164: :
                   1165: [ defined? (swap) [IF] ]
                   1166:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
                   1167: Variable (rot)
                   1168: [ELSE] ]
                   1169:     >r swap r> swap ;
                   1170: [THEN]
                   1171: 
1.47      anton    1172: -rot   ( w1 w2 w3 -- w3 w1 w2 )        gforth  not_rote
1.1       anton    1173: :
                   1174:  rot rot ;
                   1175: 
1.47      anton    1176: nip    ( w1 w2 -- w2 )         core-ext
1.1       anton    1177: :
1.6       jwilke   1178:  swap drop ;
1.1       anton    1179: 
1.47      anton    1180: tuck   ( w1 w2 -- w2 w1 w2 )   core-ext
1.1       anton    1181: :
                   1182:  swap over ;
                   1183: 
1.47      anton    1184: ?dup   ( w -- w )                      core    question_dupe
1.52      anton    1185: ""Actually the stack effect is: @code{( w -- 0 | w w )}.  It performs a
                   1186: @code{dup} if w is nonzero.""
1.1       anton    1187: if (w!=0) {
1.64      anton    1188:   IF_spTOS(*sp-- = w;)
1.1       anton    1189: #ifndef USE_TOS
                   1190:   *--sp = w;
                   1191: #endif
                   1192: }
                   1193: :
                   1194:  dup IF dup THEN ;
                   1195: 
1.47      anton    1196: pick   ( u -- w )                      core-ext
1.52      anton    1197: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1.1       anton    1198: w = sp[u+1];
                   1199: :
                   1200:  1+ cells sp@ + @ ;
                   1201: 
1.47      anton    1202: 2drop  ( w1 w2 -- )            core    two_drop
1.1       anton    1203: :
                   1204:  drop drop ;
                   1205: 
1.47      anton    1206: 2dup   ( w1 w2 -- w1 w2 w1 w2 )        core    two_dupe
1.1       anton    1207: :
                   1208:  over over ;
                   1209: 
1.47      anton    1210: 2over  ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )    core    two_over
1.1       anton    1211: :
                   1212:  3 pick 3 pick ;
                   1213: 
1.47      anton    1214: 2swap  ( w1 w2 w3 w4 -- w3 w4 w1 w2 )  core    two_swap
1.1       anton    1215: :
                   1216:  rot >r rot r> ;
                   1217: 
1.47      anton    1218: 2rot   ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )      double-ext      two_rote
1.1       anton    1219: :
                   1220:  >r >r 2swap r> r> 2swap ;
                   1221: 
1.47      anton    1222: 2nip   ( w1 w2 w3 w4 -- w3 w4 )        gforth  two_nip
1.1       anton    1223: :
                   1224:  2swap 2drop ;
                   1225: 
1.47      anton    1226: 2tuck  ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )    gforth  two_tuck
1.1       anton    1227: :
                   1228:  2swap 2over ;
                   1229: 
                   1230: \ toggle is high-level: 0.11/0.42%
                   1231: 
1.110     pazsan   1232: \g memory
                   1233: 
1.47      anton    1234: @      ( a_addr -- w )         core    fetch
1.52      anton    1235: ""@i{w} is the cell stored at @i{a_addr}.""
1.1       anton    1236: w = *a_addr;
                   1237: 
1.112     pazsan   1238: \ lit@ / lit_fetch = lit @
                   1239: 
                   1240: lit@           ( #a_addr -- w ) new    lit_fetch
                   1241: w = *a_addr;
                   1242: 
1.47      anton    1243: !      ( w a_addr -- )         core    store
1.52      anton    1244: ""Store @i{w} into the cell at @i{a-addr}.""
1.1       anton    1245: *a_addr = w;
                   1246: 
1.47      anton    1247: +!     ( n a_addr -- )         core    plus_store
1.52      anton    1248: ""Add @i{n} to the cell at @i{a-addr}.""
1.1       anton    1249: *a_addr += n;
                   1250: :
                   1251:  tuck @ + swap ! ;
                   1252: 
1.47      anton    1253: c@     ( c_addr -- c )         core    c_fetch
1.52      anton    1254: ""@i{c} is the char stored at @i{c_addr}.""
1.1       anton    1255: c = *c_addr;
                   1256: :
                   1257: [ bigendian [IF] ]
                   1258:     [ cell>bit 4 = [IF] ]
                   1259:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1260:        IF  $FF and  ELSE  8>>  THEN  ;
                   1261:     [ [ELSE] ]
                   1262:        dup [ cell 1- ] literal and
                   1263:        tuck - @ swap [ cell 1- ] literal xor
                   1264:        0 ?DO 8>> LOOP $FF and
                   1265:     [ [THEN] ]
                   1266: [ [ELSE] ]
                   1267:     [ cell>bit 4 = [IF] ]
                   1268:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1269:        IF  8>>  ELSE  $FF and  THEN
                   1270:     [ [ELSE] ]
                   1271:        dup [ cell  1- ] literal and 
                   1272:        tuck - @ swap
                   1273:        0 ?DO 8>> LOOP 255 and
                   1274:     [ [THEN] ]
                   1275: [ [THEN] ]
                   1276: ;
                   1277: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
                   1278: 
1.47      anton    1279: c!     ( c c_addr -- )         core    c_store
1.52      anton    1280: ""Store @i{c} into the char at @i{c-addr}.""
1.1       anton    1281: *c_addr = c;
                   1282: :
                   1283: [ bigendian [IF] ]
                   1284:     [ cell>bit 4 = [IF] ]
                   1285:        tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
                   1286:        dup -2 and @ over 1 and cells masks + @ and
                   1287:        r> or swap -2 and ! ;
                   1288:        Create masks $00FF , $FF00 ,
                   1289:     [ELSE] ]
                   1290:        dup [ cell 1- ] literal and dup 
                   1291:        [ cell 1- ] literal xor >r
                   1292:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1293:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1294:     [THEN]
                   1295: [ELSE] ]
                   1296:     [ cell>bit 4 = [IF] ]
                   1297:        tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
                   1298:        dup -2 and @ over 1 and cells masks + @ and
                   1299:        r> or swap -2 and ! ;
                   1300:        Create masks $FF00 , $00FF ,
                   1301:     [ELSE] ]
                   1302:        dup [ cell 1- ] literal and dup >r
                   1303:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1304:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1305:     [THEN]
                   1306: [THEN]
                   1307: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
                   1308: 
1.47      anton    1309: 2!     ( w1 w2 a_addr -- )             core    two_store
1.52      anton    1310: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1.1       anton    1311: a_addr[0] = w2;
                   1312: a_addr[1] = w1;
                   1313: :
                   1314:  tuck ! cell+ ! ;
                   1315: 
1.47      anton    1316: 2@     ( a_addr -- w1 w2 )             core    two_fetch
1.52      anton    1317: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
                   1318: the content of the next cell.""
1.1       anton    1319: w2 = a_addr[0];
                   1320: w1 = a_addr[1];
                   1321: :
                   1322:  dup cell+ @ swap @ ;
                   1323: 
1.47      anton    1324: cell+  ( a_addr1 -- a_addr2 )  core    cell_plus
1.52      anton    1325: ""@code{1 cells +}""
1.1       anton    1326: a_addr2 = a_addr1+1;
                   1327: :
                   1328:  cell + ;
                   1329: 
1.47      anton    1330: cells  ( n1 -- n2 )            core
1.52      anton    1331: "" @i{n2} is the number of address units of @i{n1} cells.""
1.1       anton    1332: n2 = n1 * sizeof(Cell);
                   1333: :
                   1334:  [ cell
                   1335:  2/ dup [IF] ] 2* [ [THEN]
                   1336:  2/ dup [IF] ] 2* [ [THEN]
                   1337:  2/ dup [IF] ] 2* [ [THEN]
                   1338:  2/ dup [IF] ] 2* [ [THEN]
                   1339:  drop ] ;
                   1340: 
1.47      anton    1341: char+  ( c_addr1 -- c_addr2 )  core    char_plus
1.52      anton    1342: ""@code{1 chars +}.""
1.1       anton    1343: c_addr2 = c_addr1 + 1;
                   1344: :
                   1345:  1+ ;
                   1346: 
1.47      anton    1347: (chars)        ( n1 -- n2 )    gforth  paren_chars
1.1       anton    1348: n2 = n1 * sizeof(Char);
                   1349: :
                   1350:  ;
                   1351: 
1.47      anton    1352: count  ( c_addr1 -- c_addr2 u )        core
1.56      anton    1353: ""@i{c-addr2} is the first character and @i{u} the length of the
                   1354: counted string at @i{c-addr1}.""
1.1       anton    1355: u = *c_addr1;
                   1356: c_addr2 = c_addr1+1;
                   1357: :
                   1358:  dup 1+ swap c@ ;
                   1359: 
1.110     pazsan   1360: \g compiler
                   1361: 
1.138     pazsan   1362: \+f83headerstring
                   1363: 
                   1364: (f83find)      ( c_addr u f83name1 -- f83name2 )       new     paren_f83find
                   1365: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
                   1366:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1367:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1368:     break;
                   1369: f83name2=f83name1;
                   1370: :
                   1371:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
                   1372:        >r 2dup r@ cell+ char+ capscomp  0=
                   1373:        IF  2drop r>  EXIT  THEN
                   1374:        r> @
                   1375:     REPEAT  THEN  nip nip ;
                   1376: : (find-samelen) ( u f83name1 -- u f83name2/0 )
                   1377:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL  THEN ;
                   1378: : capscomp ( c_addr1 u c_addr2 -- n )
                   1379:  swap bounds
                   1380:  ?DO  dup c@ I c@ <>
                   1381:      IF  dup c@ toupper I c@ toupper =
                   1382:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1383:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1384: : sgn ( n -- -1/0/1 )
                   1385:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                   1386: 
                   1387: \-
                   1388: 
1.112     pazsan   1389: (listlfind)    ( c_addr u longname1 -- longname2 )     new     paren_listlfind
1.125     anton    1390: longname2=listlfind(c_addr, u, longname1);
1.1       anton    1391: :
1.112     pazsan   1392:     BEGIN  dup WHILE  (findl-samelen)  dup  WHILE
                   1393:        >r 2dup r@ cell+ cell+ capscomp  0=
1.1       anton    1394:        IF  2drop r>  EXIT  THEN
                   1395:        r> @
                   1396:     REPEAT  THEN  nip nip ;
1.112     pazsan   1397: : (findl-samelen) ( u longname1 -- u longname2/0 )
                   1398:     BEGIN  2dup cell+ @ lcount-mask and <> WHILE  @  dup 0= UNTIL  THEN ;
1.1       anton    1399: 
1.15      pazsan   1400: \+hash
1.1       anton    1401: 
1.112     pazsan   1402: (hashlfind)    ( c_addr u a_addr -- longname2 )        new     paren_hashlfind
1.125     anton    1403: longname2 = hashlfind(c_addr, u, a_addr);
1.1       anton    1404: :
                   1405:  BEGIN  dup  WHILE
1.112     pazsan   1406:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1407:         IF  2dup r@ cell+ cell+ capscomp 0=
1.1       anton    1408:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1409:        rdrop r>
                   1410:  REPEAT nip nip ;
                   1411: 
1.112     pazsan   1412: (tablelfind)   ( c_addr u a_addr -- longname2 )        new     paren_tablelfind
1.1       anton    1413: ""A case-sensitive variant of @code{(hashfind)}""
1.125     anton    1414: longname2 = tablelfind(c_addr, u, a_addr);
1.1       anton    1415: :
                   1416:  BEGIN  dup  WHILE
1.112     pazsan   1417:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1418:         IF  2dup r@ cell+ cell+ -text 0=
1.1       anton    1419:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1420:        rdrop r>
                   1421:  REPEAT nip nip ;
1.138     pazsan   1422: : -text ( c_addr1 u c_addr2 -- n )
                   1423:  swap bounds
                   1424:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                   1425:  ELSE  c@ I c@ - unloop  THEN  sgn ;
                   1426: : sgn ( n -- -1/0/1 )
                   1427:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1428: 
1.47      anton    1429: (hashkey1)     ( c_addr u ubits -- ukey )              gforth  paren_hashkey1
1.1       anton    1430: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
1.125     anton    1431: ukey = hashkey1(c_addr, u, ubits);
1.1       anton    1432: :
                   1433:  dup rot-values + c@ over 1 swap lshift 1- >r
                   1434:  tuck - 2swap r> 0 2swap bounds
                   1435:  ?DO  dup 4 pick lshift swap 3 pick rshift or
                   1436:       I c@ toupper xor
                   1437:       over and  LOOP
                   1438:  nip nip nip ;
                   1439: Create rot-values
                   1440:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
                   1441:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
                   1442:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
                   1443:   7 c, 5 c, 5 c,
1.138     pazsan   1444: 
                   1445: \+
1.1       anton    1446: 
1.15      pazsan   1447: \+
1.1       anton    1448: 
1.47      anton    1449: (parse-white)  ( c_addr1 u1 -- c_addr2 u2 )    gforth  paren_parse_white
1.125     anton    1450: struct Cellpair r=parse_white(c_addr1, u1);
                   1451: c_addr2 = (Char *)(r.n1);
                   1452: u2 = r.n2;
1.1       anton    1453: :
                   1454:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
                   1455:  REPEAT  THEN  2dup
                   1456:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
                   1457:  REPEAT  THEN  nip - ;
                   1458: 
1.47      anton    1459: aligned        ( c_addr -- a_addr )    core
1.29      crook    1460: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1461: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
                   1462: :
                   1463:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                   1464: 
1.47      anton    1465: faligned       ( c_addr -- f_addr )    float   f_aligned
1.29      crook    1466: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1467: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
                   1468: :
                   1469:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
                   1470: 
1.35      jwilke   1471: \ threading stuff is currently only interesting if we have a compiler
                   1472: \fhas? standardthreading has? compiler and [IF]
1.47      anton    1473: threading-method       ( -- n )        gforth  threading_method
1.1       anton    1474: ""0 if the engine is direct threaded. Note that this may change during
                   1475: the lifetime of an image.""
                   1476: #if defined(DOUBLY_INDIRECT)
                   1477: n=2;
                   1478: #else
                   1479: # if defined(DIRECT_THREADED)
                   1480: n=0;
                   1481: # else
                   1482: n=1;
                   1483: # endif
                   1484: #endif
                   1485: :
                   1486:  1 ;
1.28      jwilke   1487: 
1.35      jwilke   1488: \f[THEN]
1.1       anton    1489: 
1.83      pazsan   1490: \g hostos
                   1491: 
1.47      anton    1492: key-file       ( wfileid -- n )                gforth  paren_key_file
1.17      pazsan   1493: #ifdef HAS_FILE
1.1       anton    1494: fflush(stdout);
1.12      pazsan   1495: n = key((FILE*)wfileid);
1.17      pazsan   1496: #else
                   1497: n = key(stdin);
                   1498: #endif
1.1       anton    1499: 
1.47      anton    1500: key?-file      ( wfileid -- n )                facility        key_q_file
1.17      pazsan   1501: #ifdef HAS_FILE
1.1       anton    1502: fflush(stdout);
1.12      pazsan   1503: n = key_query((FILE*)wfileid);
1.17      pazsan   1504: #else
                   1505: n = key_query(stdin);
                   1506: #endif
                   1507: 
                   1508: \+os
1.12      pazsan   1509: 
1.47      anton    1510: stdin  ( -- wfileid )  gforth
1.12      pazsan   1511: wfileid = (Cell)stdin;
1.1       anton    1512: 
1.47      anton    1513: stdout ( -- wfileid )  gforth
1.1       anton    1514: wfileid = (Cell)stdout;
                   1515: 
1.47      anton    1516: stderr ( -- wfileid )  gforth
1.1       anton    1517: wfileid = (Cell)stderr;
                   1518: 
1.47      anton    1519: form   ( -- urows ucols )      gforth
1.1       anton    1520: ""The number of lines and columns in the terminal. These numbers may change
                   1521: with the window size.""
                   1522: /* we could block SIGWINCH here to get a consistent size, but I don't
                   1523:  think this is necessary or always beneficial */
                   1524: urows=rows;
                   1525: ucols=cols;
                   1526: 
1.47      anton    1527: flush-icache   ( c_addr u -- ) gforth  flush_icache
1.1       anton    1528: ""Make sure that the instruction cache of the processor (if there is
1.29      crook    1529: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1.1       anton    1530: afterwards. @code{END-CODE} performs a @code{flush-icache}
                   1531: automatically. Caveat: @code{flush-icache} might not work on your
                   1532: installation; this is usually the case if direct threading is not
                   1533: supported on your machine (take a look at your @file{machine.h}) and
                   1534: your machine has a separate instruction cache. In such cases,
                   1535: @code{flush-icache} does nothing instead of flushing the instruction
                   1536: cache.""
                   1537: FLUSH_ICACHE(c_addr,u);
                   1538: 
1.47      anton    1539: (bye)  ( n -- )        gforth  paren_bye
1.77      anton    1540: SUPER_END;
1.1       anton    1541: return (Label *)n;
                   1542: 
1.125     anton    1543: (system)       ( c_addr u -- wretval wior )    gforth  paren_system
1.20      pazsan   1544: #ifndef MSDOS
1.1       anton    1545: int old_tp=terminal_prepped;
                   1546: deprep_terminal();
1.20      pazsan   1547: #endif
1.1       anton    1548: wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
                   1549: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
1.20      pazsan   1550: #ifndef MSDOS
1.1       anton    1551: if (old_tp)
                   1552:   prep_terminal();
1.20      pazsan   1553: #endif
1.1       anton    1554: 
1.47      anton    1555: getenv ( c_addr1 u1 -- c_addr2 u2 )    gforth
1.29      crook    1556: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1.24      crook    1557: is the host operating system's expansion of that environment variable. If the
1.29      crook    1558: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1.24      crook    1559: in length.""
1.46      pazsan   1560: /* close ' to keep fontify happy */
1.1       anton    1561: c_addr2 = getenv(cstr(c_addr1,u1,1));
                   1562: u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
                   1563: 
1.56      anton    1564: open-pipe      ( c_addr u wfam -- wfileid wior )       gforth  open_pipe
1.84      pazsan   1565: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1.1       anton    1566: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
                   1567: 
1.47      anton    1568: close-pipe     ( wfileid -- wretval wior )             gforth  close_pipe
1.1       anton    1569: wretval = pclose((FILE *)wfileid);
                   1570: wior = IOR(wretval==-1);
                   1571: 
1.47      anton    1572: time&date      ( -- nsec nmin nhour nday nmonth nyear )        facility-ext    time_and_date
1.44      crook    1573: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
                   1574: Months are numbered from 1.""
1.127     anton    1575: #if 1
                   1576: time_t now;
                   1577: struct tm *ltime;
                   1578: time(&now);
                   1579: ltime=localtime(&now);
                   1580: #else
1.1       anton    1581: struct timeval time1;
                   1582: struct timezone zone1;
                   1583: struct tm *ltime;
                   1584: gettimeofday(&time1,&zone1);
1.51      anton    1585: /* !! Single Unix specification: 
                   1586:    If tzp is not a null pointer, the behaviour is unspecified. */
1.1       anton    1587: ltime=localtime((time_t *)&time1.tv_sec);
1.127     anton    1588: #endif
1.1       anton    1589: nyear =ltime->tm_year+1900;
                   1590: nmonth=ltime->tm_mon+1;
                   1591: nday  =ltime->tm_mday;
                   1592: nhour =ltime->tm_hour;
                   1593: nmin  =ltime->tm_min;
                   1594: nsec  =ltime->tm_sec;
                   1595: 
1.47      anton    1596: ms     ( n -- )        facility-ext
1.44      crook    1597: ""Wait at least @i{n} milli-second.""
1.1       anton    1598: struct timeval timeout;
                   1599: timeout.tv_sec=n/1000;
                   1600: timeout.tv_usec=1000*(n%1000);
                   1601: (void)select(0,0,0,0,&timeout);
                   1602: 
1.47      anton    1603: allocate       ( u -- a_addr wior )    memory
1.29      crook    1604: ""Allocate @i{u} address units of contiguous data space. The initial
1.27      crook    1605: contents of the data space is undefined. If the allocation is successful,
1.29      crook    1606: @i{a-addr} is the start address of the allocated region and @i{wior}
                   1607: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1.52      anton    1608: is a non-zero I/O result code.""
1.1       anton    1609: a_addr = (Cell *)malloc(u?u:1);
                   1610: wior = IOR(a_addr==NULL);
                   1611: 
1.47      anton    1612: free   ( a_addr -- wior )              memory
1.29      crook    1613: ""Return the region of data space starting at @i{a-addr} to the system.
1.52      anton    1614: The region must originally have been obtained using @code{allocate} or
1.29      crook    1615: @code{resize}. If the operational is successful, @i{wior} is 0.
1.52      anton    1616: If the operation fails, @i{wior} is a non-zero I/O result code.""
1.1       anton    1617: free(a_addr);
                   1618: wior = 0;
                   1619: 
1.47      anton    1620: resize ( a_addr1 u -- a_addr2 wior )   memory
1.26      crook    1621: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1.1       anton    1622: address units, possibly moving the contents to a different
1.27      crook    1623: area. @i{a-addr2} is the address of the resulting area.
1.52      anton    1624: If the operation is successful, @i{wior} is 0.
                   1625: If the operation fails, @i{wior} is a non-zero
1.29      crook    1626: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1.27      crook    1627: @code{resize} @code{allocate}s @i{u} address units.""
1.1       anton    1628: /* the following check is not necessary on most OSs, but it is needed
                   1629:    on SunOS 4.1.2. */
1.46      pazsan   1630: /* close ' to keep fontify happy */
1.1       anton    1631: if (a_addr1==NULL)
                   1632:   a_addr2 = (Cell *)malloc(u);
                   1633: else
                   1634:   a_addr2 = (Cell *)realloc(a_addr1, u);
                   1635: wior = IOR(a_addr2==NULL);     /* !! Define a return code */
                   1636: 
1.47      anton    1637: strerror       ( n -- c_addr u )       gforth
1.1       anton    1638: c_addr = strerror(n);
                   1639: u = strlen(c_addr);
                   1640: 
1.47      anton    1641: strsignal      ( n -- c_addr u )       gforth
1.133     anton    1642: c_addr = (Address)strsignal(n);
1.1       anton    1643: u = strlen(c_addr);
                   1644: 
1.47      anton    1645: call-c ( w -- )        gforth  call_c
1.1       anton    1646: ""Call the C function pointed to by @i{w}. The C function has to
                   1647: access the stack itself. The stack pointers are exported in the global
                   1648: variables @code{SP} and @code{FP}.""
                   1649: /* This is a first attempt at support for calls to C. This may change in
                   1650:    the future */
1.64      anton    1651: IF_fpTOS(fp[0]=fpTOS);
1.1       anton    1652: FP=fp;
                   1653: SP=sp;
                   1654: ((void (*)())w)();
                   1655: sp=SP;
                   1656: fp=FP;
1.64      anton    1657: IF_spTOS(spTOS=sp[0]);
                   1658: IF_fpTOS(fpTOS=fp[0]);
1.1       anton    1659: 
1.15      pazsan   1660: \+
                   1661: \+file
1.1       anton    1662: 
1.47      anton    1663: close-file     ( wfileid -- wior )             file    close_file
1.1       anton    1664: wior = IOR(fclose((FILE *)wfileid)==EOF);
                   1665: 
1.56      anton    1666: open-file      ( c_addr u wfam -- wfileid wior )       file    open_file
                   1667: wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
1.22      crook    1668: wior =  IOR(wfileid == 0);
1.1       anton    1669: 
1.56      anton    1670: create-file    ( c_addr u wfam -- wfileid wior )       file    create_file
1.1       anton    1671: Cell   fd;
1.56      anton    1672: fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[wfam], 0666);
1.1       anton    1673: if (fd != -1) {
1.56      anton    1674:   wfileid = (Cell)fdopen(fd, fileattr[wfam]);
1.22      crook    1675:   wior = IOR(wfileid == 0);
1.1       anton    1676: } else {
1.22      crook    1677:   wfileid = 0;
1.1       anton    1678:   wior = IOR(1);
                   1679: }
                   1680: 
1.47      anton    1681: delete-file    ( c_addr u -- wior )            file    delete_file
1.1       anton    1682: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
                   1683: 
1.47      anton    1684: rename-file    ( c_addr1 u1 c_addr2 u2 -- wior )       file-ext        rename_file
1.29      crook    1685: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1.125     anton    1686: wior = rename_file(c_addr1, u1, c_addr2, u2);
1.1       anton    1687: 
1.47      anton    1688: file-position  ( wfileid -- ud wior )  file    file_position
1.1       anton    1689: /* !! use tell and lseek? */
1.108     anton    1690: ud = OFF2UD(ftello((FILE *)wfileid));
                   1691: wior = IOR(UD2OFF(ud)==-1);
1.1       anton    1692: 
1.47      anton    1693: reposition-file        ( ud wfileid -- wior )  file    reposition_file
1.108     anton    1694: wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1.1       anton    1695: 
1.47      anton    1696: file-size      ( wfileid -- ud wior )  file    file_size
1.1       anton    1697: struct stat buf;
                   1698: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1.108     anton    1699: ud = OFF2UD(buf.st_size);
1.1       anton    1700: 
1.47      anton    1701: resize-file    ( ud wfileid -- wior )  file    resize_file
1.108     anton    1702: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1.1       anton    1703: 
1.47      anton    1704: read-file      ( c_addr u1 wfileid -- u2 wior )        file    read_file
1.1       anton    1705: /* !! fread does not guarantee enough */
                   1706: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1707: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1708: /* !! is the value of ferror errno-compatible? */
                   1709: if (wior)
                   1710:   clearerr((FILE *)wfileid);
                   1711: 
1.125     anton    1712: (read-line)    ( c_addr u1 wfileid -- u2 flag u3 wior ) file   paren_read_line
                   1713: struct Cellquad r = read_line(c_addr, u1, wfileid);
                   1714: u2   = r.n1;
                   1715: flag = r.n2;
                   1716: u3   = r.n3;
                   1717: wior = r.n4;
1.1       anton    1718: 
1.15      pazsan   1719: \+
1.1       anton    1720: 
1.47      anton    1721: write-file     ( c_addr u1 wfileid -- wior )   file    write_file
1.1       anton    1722: /* !! fwrite does not guarantee enough */
1.39      pazsan   1723: #ifdef HAS_FILE
1.1       anton    1724: {
                   1725:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1726:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1727:   if (wior)
                   1728:     clearerr((FILE *)wfileid);
                   1729: }
1.39      pazsan   1730: #else
                   1731: TYPE(c_addr, u1);
                   1732: #endif
1.17      pazsan   1733: 
1.47      anton    1734: emit-file      ( c wfileid -- wior )   gforth  emit_file
1.17      pazsan   1735: #ifdef HAS_FILE
1.1       anton    1736: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
                   1737: if (wior)
                   1738:   clearerr((FILE *)wfileid);
1.17      pazsan   1739: #else
1.36      pazsan   1740: PUTC(c);
1.17      pazsan   1741: #endif
1.1       anton    1742: 
1.15      pazsan   1743: \+file
1.1       anton    1744: 
1.47      anton    1745: flush-file     ( wfileid -- wior )             file-ext        flush_file
1.1       anton    1746: wior = IOR(fflush((FILE *) wfileid)==EOF);
                   1747: 
1.56      anton    1748: file-status    ( c_addr u -- wfam wior )       file-ext        file_status
1.125     anton    1749: struct Cellpair r = file_status(c_addr, u);
                   1750: wfam = r.n1;
                   1751: wior = r.n2;
1.1       anton    1752: 
1.112     pazsan   1753: file-eof?      ( wfileid -- flag )     gforth  file_eof_query
                   1754: flag = FLAG(feof((FILE *) wfileid));
1.1       anton    1755: 
1.112     pazsan   1756: open-dir       ( c_addr u -- wdirid wior )     gforth  open_dir
                   1757: ""Open the directory specified by @i{c-addr, u}
                   1758: and return @i{dir-id} for futher access to it.""
                   1759: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
                   1760: wior =  IOR(wdirid == 0);
                   1761: 
                   1762: read-dir       ( c_addr u1 wdirid -- u2 flag wior )    gforth  read_dir
                   1763: ""Attempt to read the next entry from the directory specified
                   1764: by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}. 
                   1765: If the attempt fails because there is no more entries,
                   1766: @i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
                   1767: If the attempt to read the next entry fails because of any other reason, 
                   1768: return @i{ior}<>0.
                   1769: If the attempt succeeds, store file name to the buffer at @i{c-addr}
                   1770: and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
                   1771: If the length of the file name is greater than @i{u1}, 
                   1772: store first @i{u1} characters from file name into the buffer and
                   1773: indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
                   1774: struct dirent * dent;
                   1775: dent = readdir((DIR *)wdirid);
                   1776: wior = 0;
                   1777: flag = -1;
                   1778: if(dent == NULL) {
                   1779:   u2 = 0;
                   1780:   flag = 0;
                   1781: } else {
                   1782:   u2 = strlen(dent->d_name);
                   1783:   if(u2 > u1) {
                   1784:     u2 = u1;
                   1785:     wior = -512-ENAMETOOLONG;
                   1786:   }
                   1787:   memmove(c_addr, dent->d_name, u2);
                   1788: }
                   1789: 
                   1790: close-dir      ( wdirid -- wior )      gforth  close_dir
                   1791: ""Close the directory specified by @i{dir-id}.""
                   1792: wior = IOR(closedir((DIR *)wdirid));
                   1793: 
                   1794: filename-match ( c_addr1 u1 c_addr2 u2 -- flag )       gforth  match_file
                   1795: char * string = cstr(c_addr1, u1, 1);
                   1796: char * pattern = cstr(c_addr2, u2, 0);
                   1797: flag = FLAG(!fnmatch(pattern, string, 0));
                   1798: 
                   1799: \+
                   1800: 
                   1801: newline        ( -- c_addr u ) gforth
                   1802: ""String containing the newline sequence of the host OS""
                   1803: char newline[] = {
1.115     anton    1804: #if DIRSEP=='/'
                   1805: /* Unix */
1.112     pazsan   1806: '\n'
                   1807: #else
1.115     anton    1808: /* DOS, Win, OS/2 */
1.112     pazsan   1809: '\r','\n'
                   1810: #endif
                   1811: };
                   1812: c_addr=newline;
                   1813: u=sizeof(newline);
                   1814: :
                   1815:  "newline count ;
                   1816: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
                   1817: 
                   1818: \+os
                   1819: 
                   1820: utime  ( -- dtime )    gforth
                   1821: ""Report the current time in microseconds since some epoch.""
                   1822: struct timeval time1;
                   1823: gettimeofday(&time1,NULL);
                   1824: dtime = timeval2us(&time1);
                   1825: 
                   1826: cputime ( -- duser dsystem ) gforth
                   1827: ""duser and dsystem are the respective user- and system-level CPU
                   1828: times used since the start of the Forth system (excluding child
                   1829: processes), in microseconds (the granularity may be much larger,
                   1830: however).  On platforms without the getrusage call, it reports elapsed
                   1831: time (since some epoch) for duser and 0 for dsystem.""
                   1832: #ifdef HAVE_GETRUSAGE
                   1833: struct rusage usage;
                   1834: getrusage(RUSAGE_SELF, &usage);
                   1835: duser = timeval2us(&usage.ru_utime);
                   1836: dsystem = timeval2us(&usage.ru_stime);
                   1837: #else
                   1838: struct timeval time1;
                   1839: gettimeofday(&time1,NULL);
                   1840: duser = timeval2us(&time1);
                   1841: #ifndef BUGGY_LONG_LONG
                   1842: dsystem = (DCell)0;
                   1843: #else
                   1844: dsystem=(DCell){0,0};
                   1845: #endif
                   1846: #endif
                   1847: 
                   1848: \+
                   1849: 
                   1850: \+floating
                   1851: 
                   1852: \g floating
1.83      pazsan   1853: 
1.1       anton    1854: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
                   1855: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
                   1856: 
1.47      anton    1857: d>f    ( d -- r )              float   d_to_f
1.1       anton    1858: #ifdef BUGGY_LONG_LONG
                   1859: extern double ldexp(double x, int exp);
1.113     anton    1860: if (d.hi<0) {
                   1861:   DCell d2=dnegate(d);
                   1862:   r = -(ldexp((Float)d2.hi,CELL_BITS) + (Float)d2.lo);
                   1863: } else
                   1864:   r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
1.1       anton    1865: #else
                   1866: r = d;
                   1867: #endif
                   1868: 
1.47      anton    1869: f>d    ( r -- d )              float   f_to_d
1.100     pazsan   1870: extern DCell double2ll(Float r);
                   1871: d = double2ll(r);
1.1       anton    1872: 
1.47      anton    1873: f!     ( r f_addr -- ) float   f_store
1.52      anton    1874: ""Store @i{r} into the float at address @i{f-addr}.""
1.1       anton    1875: *f_addr = r;
                   1876: 
1.47      anton    1877: f@     ( f_addr -- r ) float   f_fetch
1.52      anton    1878: ""@i{r} is the float at address @i{f-addr}.""
1.1       anton    1879: r = *f_addr;
                   1880: 
1.47      anton    1881: df@    ( df_addr -- r )        float-ext       d_f_fetch
1.52      anton    1882: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1.1       anton    1883: #ifdef IEEE_FP
                   1884: r = *df_addr;
                   1885: #else
                   1886: !! df@
                   1887: #endif
                   1888: 
1.47      anton    1889: df!    ( r df_addr -- )        float-ext       d_f_store
1.52      anton    1890: ""Store @i{r} as double-precision IEEE floating-point value to the
                   1891: address @i{df-addr}.""
1.1       anton    1892: #ifdef IEEE_FP
                   1893: *df_addr = r;
                   1894: #else
                   1895: !! df!
                   1896: #endif
                   1897: 
1.47      anton    1898: sf@    ( sf_addr -- r )        float-ext       s_f_fetch
1.52      anton    1899: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1.1       anton    1900: #ifdef IEEE_FP
                   1901: r = *sf_addr;
                   1902: #else
                   1903: !! sf@
                   1904: #endif
                   1905: 
1.47      anton    1906: sf!    ( r sf_addr -- )        float-ext       s_f_store
1.52      anton    1907: ""Store @i{r} as single-precision IEEE floating-point value to the
                   1908: address @i{sf-addr}.""
1.1       anton    1909: #ifdef IEEE_FP
                   1910: *sf_addr = r;
                   1911: #else
                   1912: !! sf!
                   1913: #endif
                   1914: 
1.47      anton    1915: f+     ( r1 r2 -- r3 ) float   f_plus
1.1       anton    1916: r3 = r1+r2;
                   1917: 
1.47      anton    1918: f-     ( r1 r2 -- r3 ) float   f_minus
1.1       anton    1919: r3 = r1-r2;
                   1920: 
1.47      anton    1921: f*     ( r1 r2 -- r3 ) float   f_star
1.1       anton    1922: r3 = r1*r2;
                   1923: 
1.47      anton    1924: f/     ( r1 r2 -- r3 ) float   f_slash
1.1       anton    1925: r3 = r1/r2;
                   1926: 
1.47      anton    1927: f**    ( r1 r2 -- r3 ) float-ext       f_star_star
1.26      crook    1928: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1.1       anton    1929: r3 = pow(r1,r2);
                   1930: 
1.47      anton    1931: fnegate        ( r1 -- r2 )    float   f_negate
1.1       anton    1932: r2 = - r1;
                   1933: 
1.47      anton    1934: fdrop  ( r -- )                float   f_drop
1.1       anton    1935: 
1.47      anton    1936: fdup   ( r -- r r )    float   f_dupe
1.1       anton    1937: 
1.47      anton    1938: fswap  ( r1 r2 -- r2 r1 )      float   f_swap
1.1       anton    1939: 
1.47      anton    1940: fover  ( r1 r2 -- r1 r2 r1 )   float   f_over
1.1       anton    1941: 
1.47      anton    1942: frot   ( r1 r2 r3 -- r2 r3 r1 )        float   f_rote
1.1       anton    1943: 
1.47      anton    1944: fnip   ( r1 r2 -- r2 ) gforth  f_nip
1.1       anton    1945: 
1.47      anton    1946: ftuck  ( r1 r2 -- r2 r1 r2 )   gforth  f_tuck
1.1       anton    1947: 
1.47      anton    1948: float+ ( f_addr1 -- f_addr2 )  float   float_plus
1.52      anton    1949: ""@code{1 floats +}.""
1.1       anton    1950: f_addr2 = f_addr1+1;
                   1951: 
1.47      anton    1952: floats ( n1 -- n2 )    float
1.52      anton    1953: ""@i{n2} is the number of address units of @i{n1} floats.""
1.1       anton    1954: n2 = n1*sizeof(Float);
                   1955: 
1.47      anton    1956: floor  ( r1 -- r2 )    float
1.26      crook    1957: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1.1       anton    1958: /* !! unclear wording */
                   1959: r2 = floor(r1);
                   1960: 
1.105     anton    1961: fround ( r1 -- r2 )    gforth  f_round
                   1962: ""Round to the nearest integral value.""
1.1       anton    1963: r2 = rint(r1);
                   1964: 
1.47      anton    1965: fmax   ( r1 r2 -- r3 ) float   f_max
1.1       anton    1966: if (r1<r2)
                   1967:   r3 = r2;
                   1968: else
                   1969:   r3 = r1;
                   1970: 
1.47      anton    1971: fmin   ( r1 r2 -- r3 ) float   f_min
1.1       anton    1972: if (r1<r2)
                   1973:   r3 = r1;
                   1974: else
                   1975:   r3 = r2;
                   1976: 
1.47      anton    1977: represent      ( r c_addr u -- n f1 f2 )       float
1.1       anton    1978: char *sig;
1.122     anton    1979: size_t siglen;
1.1       anton    1980: int flag;
                   1981: int decpt;
                   1982: sig=ecvt(r, u, &decpt, &flag);
1.122     anton    1983: n=(r==0. ? 1 : decpt);
1.1       anton    1984: f1=FLAG(flag!=0);
1.21      anton    1985: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1.122     anton    1986: siglen=strlen(sig);
1.124     anton    1987: if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
                   1988:   siglen=u;
1.122     anton    1989: memcpy(c_addr,sig,siglen);
1.123     anton    1990: memset(c_addr+siglen,f2?'0':' ',u-siglen);
1.1       anton    1991: 
1.47      anton    1992: >float ( c_addr u -- flag )    float   to_float
1.56      anton    1993: ""Actual stack effect: ( c_addr u -- r t | f ).  Attempt to convert the
                   1994: character string @i{c-addr u} to internal floating-point
                   1995: representation. If the string represents a valid floating-point number
                   1996: @i{r} is placed on the floating-point stack and @i{flag} is
                   1997: true. Otherwise, @i{flag} is false. A string of blanks is a special
                   1998: case and represents the floating-point number 0.""
1.1       anton    1999: Float r;
1.125     anton    2000: flag = to_float(c_addr, u, &r);
                   2001: if (flag) {
                   2002:   IF_fpTOS(fp[0] = fpTOS);
                   2003:   fp += -1;
                   2004:   fpTOS = r;
1.1       anton    2005: }
                   2006: 
1.47      anton    2007: fabs   ( r1 -- r2 )    float-ext       f_abs
1.1       anton    2008: r2 = fabs(r1);
                   2009: 
1.47      anton    2010: facos  ( r1 -- r2 )    float-ext       f_a_cos
1.1       anton    2011: r2 = acos(r1);
                   2012: 
1.47      anton    2013: fasin  ( r1 -- r2 )    float-ext       f_a_sine
1.1       anton    2014: r2 = asin(r1);
                   2015: 
1.47      anton    2016: fatan  ( r1 -- r2 )    float-ext       f_a_tan
1.1       anton    2017: r2 = atan(r1);
                   2018: 
1.47      anton    2019: fatan2 ( r1 r2 -- r3 ) float-ext       f_a_tan_two
1.26      crook    2020: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1.1       anton    2021: intends this to be the inverse of @code{fsincos}. In gforth it is.""
                   2022: r3 = atan2(r1,r2);
                   2023: 
1.47      anton    2024: fcos   ( r1 -- r2 )    float-ext       f_cos
1.1       anton    2025: r2 = cos(r1);
                   2026: 
1.47      anton    2027: fexp   ( r1 -- r2 )    float-ext       f_e_x_p
1.1       anton    2028: r2 = exp(r1);
                   2029: 
1.47      anton    2030: fexpm1 ( r1 -- r2 )    float-ext       f_e_x_p_m_one
1.1       anton    2031: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
                   2032: #ifdef HAVE_EXPM1
1.3       pazsan   2033: extern double
                   2034: #ifdef NeXT
                   2035:               const
                   2036: #endif
                   2037:                     expm1(double);
1.1       anton    2038: r2 = expm1(r1);
                   2039: #else
                   2040: r2 = exp(r1)-1.;
                   2041: #endif
                   2042: 
1.47      anton    2043: fln    ( r1 -- r2 )    float-ext       f_l_n
1.1       anton    2044: r2 = log(r1);
                   2045: 
1.47      anton    2046: flnp1  ( r1 -- r2 )    float-ext       f_l_n_p_one
1.1       anton    2047: ""@i{r2}=ln(@i{r1}+1)""
                   2048: #ifdef HAVE_LOG1P
1.3       pazsan   2049: extern double
                   2050: #ifdef NeXT
                   2051:               const
                   2052: #endif
                   2053:                     log1p(double);
1.1       anton    2054: r2 = log1p(r1);
                   2055: #else
                   2056: r2 = log(r1+1.);
                   2057: #endif
                   2058: 
1.47      anton    2059: flog   ( r1 -- r2 )    float-ext       f_log
1.26      crook    2060: ""The decimal logarithm.""
1.1       anton    2061: r2 = log10(r1);
                   2062: 
1.47      anton    2063: falog  ( r1 -- r2 )    float-ext       f_a_log
1.1       anton    2064: ""@i{r2}=10**@i{r1}""
                   2065: extern double pow10(double);
                   2066: r2 = pow10(r1);
                   2067: 
1.47      anton    2068: fsin   ( r1 -- r2 )    float-ext       f_sine
1.1       anton    2069: r2 = sin(r1);
                   2070: 
1.47      anton    2071: fsincos        ( r1 -- r2 r3 ) float-ext       f_sine_cos
1.1       anton    2072: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
                   2073: r2 = sin(r1);
                   2074: r3 = cos(r1);
                   2075: 
1.47      anton    2076: fsqrt  ( r1 -- r2 )    float-ext       f_square_root
1.1       anton    2077: r2 = sqrt(r1);
                   2078: 
1.47      anton    2079: ftan   ( r1 -- r2 )    float-ext       f_tan
1.1       anton    2080: r2 = tan(r1);
                   2081: :
                   2082:  fsincos f/ ;
                   2083: 
1.47      anton    2084: fsinh  ( r1 -- r2 )    float-ext       f_cinch
1.1       anton    2085: r2 = sinh(r1);
                   2086: :
                   2087:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
                   2088: 
1.47      anton    2089: fcosh  ( r1 -- r2 )    float-ext       f_cosh
1.1       anton    2090: r2 = cosh(r1);
                   2091: :
                   2092:  fexp fdup 1/f f+ f2/ ;
                   2093: 
1.47      anton    2094: ftanh  ( r1 -- r2 )    float-ext       f_tan_h
1.1       anton    2095: r2 = tanh(r1);
                   2096: :
                   2097:  f2* fexpm1 fdup 2. d>f f+ f/ ;
                   2098: 
1.47      anton    2099: fasinh ( r1 -- r2 )    float-ext       f_a_cinch
1.1       anton    2100: r2 = asinh(r1);
                   2101: :
                   2102:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
                   2103: 
1.47      anton    2104: facosh ( r1 -- r2 )    float-ext       f_a_cosh
1.1       anton    2105: r2 = acosh(r1);
                   2106: :
                   2107:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
                   2108: 
1.47      anton    2109: fatanh ( r1 -- r2 )    float-ext       f_a_tan_h
1.1       anton    2110: r2 = atanh(r1);
                   2111: :
                   2112:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
                   2113:  r> IF  fnegate  THEN ;
                   2114: 
1.47      anton    2115: sfloats        ( n1 -- n2 )    float-ext       s_floats
1.52      anton    2116: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2117: single-precision IEEE floating-point numbers.""
1.1       anton    2118: n2 = n1*sizeof(SFloat);
                   2119: 
1.47      anton    2120: dfloats        ( n1 -- n2 )    float-ext       d_floats
1.52      anton    2121: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2122: double-precision IEEE floating-point numbers.""
1.1       anton    2123: n2 = n1*sizeof(DFloat);
                   2124: 
1.47      anton    2125: sfaligned      ( c_addr -- sf_addr )   float-ext       s_f_aligned
1.52      anton    2126: ""@i{sf-addr} is the first single-float-aligned address greater
1.29      crook    2127: than or equal to @i{c-addr}.""
1.1       anton    2128: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
                   2129: :
                   2130:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
                   2131: 
1.47      anton    2132: dfaligned      ( c_addr -- df_addr )   float-ext       d_f_aligned
1.52      anton    2133: ""@i{df-addr} is the first double-float-aligned address greater
1.29      crook    2134: than or equal to @i{c-addr}.""
1.1       anton    2135: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
                   2136: :
                   2137:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
                   2138: 
1.112     pazsan   2139: v*     ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
                   2140: ""dot-product: r=v1*v2.  The first element of v1 is at f_addr1, the
                   2141: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
                   2142: ucount elements.""
1.125     anton    2143: r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
1.112     pazsan   2144: :
                   2145:  >r swap 2swap swap 0e r> 0 ?DO
                   2146:      dup f@ over + 2swap dup f@ f* f+ over + 2swap
                   2147:  LOOP 2drop 2drop ; 
                   2148: 
                   2149: faxpy  ( ra f_x nstridex f_y nstridey ucount -- )      gforth
                   2150: ""vy=ra*vx+vy""
1.125     anton    2151: faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
1.112     pazsan   2152: :
                   2153:  >r swap 2swap swap r> 0 ?DO
                   2154:      fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
                   2155:  LOOP 2drop 2drop fdrop ;
                   2156: 
                   2157: \+
                   2158: 
1.1       anton    2159: \ The following words access machine/OS/installation-dependent
                   2160: \   Gforth internals
                   2161: \ !! how about environmental queries DIRECT-THREADED,
                   2162: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
                   2163: 
                   2164: \ local variable implementation primitives
1.112     pazsan   2165: 
1.15      pazsan   2166: \+glocals
1.1       anton    2167: 
1.110     pazsan   2168: \g locals
                   2169: 
1.68      anton    2170: @local#        ( #noffset -- w )       gforth  fetch_local_number
                   2171: w = *(Cell *)(lp+noffset);
1.1       anton    2172: 
1.47      anton    2173: @local0        ( -- w )        new     fetch_local_zero
1.112     pazsan   2174: w = ((Cell *)lp)[0];
1.1       anton    2175: 
1.47      anton    2176: @local1        ( -- w )        new     fetch_local_four
1.112     pazsan   2177: w = ((Cell *)lp)[1];
1.1       anton    2178: 
1.47      anton    2179: @local2        ( -- w )        new     fetch_local_eight
1.112     pazsan   2180: w = ((Cell *)lp)[2];
1.1       anton    2181: 
1.47      anton    2182: @local3        ( -- w )        new     fetch_local_twelve
1.112     pazsan   2183: w = ((Cell *)lp)[3];
1.1       anton    2184: 
1.15      pazsan   2185: \+floating
1.1       anton    2186: 
1.68      anton    2187: f@local#       ( #noffset -- r )       gforth  f_fetch_local_number
                   2188: r = *(Float *)(lp+noffset);
1.1       anton    2189: 
1.47      anton    2190: f@local0       ( -- r )        new     f_fetch_local_zero
1.112     pazsan   2191: r = ((Float *)lp)[0];
1.1       anton    2192: 
1.47      anton    2193: f@local1       ( -- r )        new     f_fetch_local_eight
1.112     pazsan   2194: r = ((Float *)lp)[1];
1.1       anton    2195: 
1.15      pazsan   2196: \+
1.1       anton    2197: 
1.68      anton    2198: laddr# ( #noffset -- c_addr )  gforth  laddr_number
1.1       anton    2199: /* this can also be used to implement lp@ */
1.68      anton    2200: c_addr = (Char *)(lp+noffset);
1.1       anton    2201: 
1.68      anton    2202: lp+!#  ( #noffset -- ) gforth  lp_plus_store_number
1.1       anton    2203: ""used with negative immediate values it allocates memory on the
                   2204: local stack, a positive immediate argument drops memory from the local
                   2205: stack""
1.68      anton    2206: lp += noffset;
1.1       anton    2207: 
1.47      anton    2208: lp-    ( -- )  new     minus_four_lp_plus_store
1.1       anton    2209: lp += -sizeof(Cell);
                   2210: 
1.47      anton    2211: lp+    ( -- )  new     eight_lp_plus_store
1.1       anton    2212: lp += sizeof(Float);
                   2213: 
1.47      anton    2214: lp+2   ( -- )  new     sixteen_lp_plus_store
1.1       anton    2215: lp += 2*sizeof(Float);
                   2216: 
1.47      anton    2217: lp!    ( c_addr -- )   gforth  lp_store
1.1       anton    2218: lp = (Address)c_addr;
                   2219: 
1.47      anton    2220: >l     ( w -- )        gforth  to_l
1.1       anton    2221: lp -= sizeof(Cell);
                   2222: *(Cell *)lp = w;
                   2223: 
1.15      pazsan   2224: \+floating
1.1       anton    2225: 
1.47      anton    2226: f>l    ( r -- )        gforth  f_to_l
1.1       anton    2227: lp -= sizeof(Float);
                   2228: *(Float *)lp = r;
                   2229: 
1.47      anton    2230: fpick  ( u -- r )              gforth
1.52      anton    2231: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
1.11      anton    2232: r = fp[u+1]; /* +1, because update of fp happens before this fragment */
                   2233: :
                   2234:  floats fp@ + f@ ;
                   2235: 
1.15      pazsan   2236: \+
                   2237: \+
1.1       anton    2238: 
1.15      pazsan   2239: \+OS
1.1       anton    2240: 
1.110     pazsan   2241: \g syslib
                   2242: 
1.131     pazsan   2243: open-lib       ( c_addr1 u1 -- u2 )    gforth  open_lib
                   2244: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2245: #ifndef RTLD_GLOBAL
                   2246: #define RTLD_GLOBAL 0
                   2247: #endif
                   2248: u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL | RTLD_LAZY);
                   2249: #else
                   2250: #  ifdef _WIN32
                   2251: u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
                   2252: #  else
                   2253: #warning Define open-lib!
                   2254: u2 = 0;
                   2255: #  endif
                   2256: #endif
                   2257: 
                   2258: lib-sym        ( c_addr1 u1 u2 -- u3 ) gforth  lib_sym
                   2259: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2260: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
                   2261: #else
                   2262: #  ifdef _WIN32
                   2263: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
                   2264: #  else
                   2265: #warning Define lib-sym!
                   2266: u3 = 0;
                   2267: #  endif
                   2268: #endif
                   2269: 
1.142   ! pazsan   2270: wcall  ( u -- )        gforth
        !          2271: IF_fpTOS(fp[0]=fpTOS);
        !          2272: FP=fp;
        !          2273: sp=(Cell*)(SYSCALL(Cell*(*)(Cell *, void *))u)(sp, &FP);
        !          2274: fp=FP;
        !          2275: IF_spTOS(spTOS=sp[0];)
        !          2276: IF_fpTOS(fpTOS=fp[0]);
        !          2277: 
1.131     pazsan   2278: \+FFCALL
                   2279: 
1.136     pazsan   2280: av-start-void  ( c_addr -- )   gforth  av_start_void
1.131     pazsan   2281: av_start_void(alist, c_addr);
                   2282: 
1.136     pazsan   2283: av-start-int   ( c_addr -- )   gforth  av_start_int
1.131     pazsan   2284: av_start_int(alist, c_addr, &irv);
                   2285: 
1.136     pazsan   2286: av-start-float ( c_addr -- )   gforth  av_start_float
1.131     pazsan   2287: av_start_float(alist, c_addr, &frv);
                   2288: 
1.136     pazsan   2289: av-start-double        ( c_addr -- )   gforth  av_start_double
1.131     pazsan   2290: av_start_double(alist, c_addr, &drv);
                   2291: 
1.136     pazsan   2292: av-start-longlong      ( c_addr -- )   gforth  av_start_longlong
1.131     pazsan   2293: av_start_longlong(alist, c_addr, &llrv);
                   2294: 
1.136     pazsan   2295: av-start-ptr   ( c_addr -- )   gforth  av_start_ptr
1.131     pazsan   2296: av_start_ptr(alist, c_addr, void*, &prv);
                   2297: 
                   2298: av-int  ( w -- )  gforth  av_int
                   2299: av_int(alist, w);
                   2300: 
1.136     pazsan   2301: av-float       ( r -- )        gforth  av_float
1.131     pazsan   2302: av_float(alist, r);
                   2303: 
1.136     pazsan   2304: av-double      ( r -- )        gforth  av_double
1.131     pazsan   2305: av_double(alist, r);
                   2306: 
1.136     pazsan   2307: av-longlong    ( d -- )        gforth  av_longlong
1.131     pazsan   2308: av_longlong(alist, d);
                   2309: 
1.136     pazsan   2310: av-ptr ( c_addr -- )   gforth  av_ptr
1.131     pazsan   2311: av_ptr(alist, void*, c_addr);
                   2312: 
1.136     pazsan   2313: av-int-r  ( R:w -- )  gforth  av_int_r
                   2314: av_int(alist, w);
                   2315: 
                   2316: av-float-r     ( -- )  gforth  av_float_r
                   2317: float r = *(Float*)lp;
                   2318: lp += sizeof(Float);
                   2319: av_float(alist, r);
                   2320: 
                   2321: av-double-r    ( -- )  gforth  av_double_r
                   2322: double r = *(Float*)lp;
                   2323: lp += sizeof(Float);
                   2324: av_double(alist, r);
                   2325: 
                   2326: av-longlong-r  ( R:d -- )      gforth  av_longlong_r
                   2327: av_longlong(alist, d);
                   2328: 
                   2329: av-ptr-r       ( R:c_addr -- ) gforth  av_ptr_r
                   2330: av_ptr(alist, void*, c_addr);
                   2331: 
                   2332: av-call-void   ( -- )  gforth  av_call_void
1.131     pazsan   2333: SAVE_REGS
                   2334: av_call(alist);
                   2335: REST_REGS
                   2336: 
1.136     pazsan   2337: av-call-int    ( -- w )        gforth  av_call_int
1.131     pazsan   2338: SAVE_REGS
                   2339: av_call(alist);
1.134     pazsan   2340: REST_REGS
1.131     pazsan   2341: w = irv;
                   2342: 
1.136     pazsan   2343: av-call-float  ( -- r )        gforth  av_call_float
1.131     pazsan   2344: SAVE_REGS
                   2345: av_call(alist);
                   2346: REST_REGS
                   2347: r = frv;
                   2348: 
1.136     pazsan   2349: av-call-double ( -- r )        gforth  av_call_double
1.131     pazsan   2350: SAVE_REGS
                   2351: av_call(alist);
                   2352: REST_REGS
                   2353: r = drv;
                   2354: 
1.136     pazsan   2355: av-call-longlong       ( -- d )        gforth  av_call_longlong
1.131     pazsan   2356: SAVE_REGS
                   2357: av_call(alist);
                   2358: REST_REGS
                   2359: d = llrv;
                   2360: 
1.136     pazsan   2361: av-call-ptr    ( -- c_addr )   gforth  av_call_ptr
1.131     pazsan   2362: SAVE_REGS
                   2363: av_call(alist);
                   2364: REST_REGS
                   2365: c_addr = prv;
                   2366: 
1.135     pazsan   2367: alloc-callback ( a_ip -- c_addr )      gforth  alloc_callback
                   2368: c_addr = (char *)alloc_callback(engine_callback, (Xt *)a_ip);
1.131     pazsan   2369: 
1.135     pazsan   2370: va-start-void  ( -- )  gforth  va_start_void
                   2371: va_start_void(clist);
1.131     pazsan   2372: 
1.135     pazsan   2373: va-start-int   ( -- )  gforth  va_start_int
                   2374: va_start_int(clist);
1.131     pazsan   2375: 
1.135     pazsan   2376: va-start-longlong      ( -- )  gforth  va_start_longlong
                   2377: va_start_longlong(clist);
1.131     pazsan   2378: 
1.135     pazsan   2379: va-start-ptr   ( -- )  gforth  va_start_ptr
                   2380: va_start_ptr(clist, (char *));
1.131     pazsan   2381: 
1.135     pazsan   2382: va-start-float ( -- )  gforth  va_start_float
                   2383: va_start_float(clist);
                   2384: 
                   2385: va-start-double        ( -- )  gforth  va_start_double
                   2386: va_start_double(clist);
                   2387: 
                   2388: va-arg-int     ( -- w )        gforth  va_arg_int
                   2389: w = va_arg_int(clist);
                   2390: 
                   2391: va-arg-longlong        ( -- d )        gforth  va_arg_longlong
                   2392: d = va_arg_longlong(clist);
                   2393: 
                   2394: va-arg-ptr     ( -- c_addr )   gforth  va_arg_ptr
                   2395: c_addr = (char *)va_arg_ptr(clist,char*);
                   2396: 
                   2397: va-arg-float   ( -- r )        gforth  va_arg_float
                   2398: r = va_arg_float(clist);
                   2399: 
                   2400: va-arg-double  ( -- r )        gforth  va_arg_double
                   2401: r = va_arg_double(clist);
1.131     pazsan   2402: 
                   2403: va-return-void ( -- )  gforth va_return_void
                   2404: va_return_void(clist);
                   2405: return 0;
                   2406: 
                   2407: va-return-int ( w -- ) gforth va_return_int
                   2408: va_return_int(clist, w);
                   2409: return 0;
                   2410: 
                   2411: va-return-ptr ( c_addr -- )    gforth va_return_ptr
                   2412: va_return_ptr(clist, void *, c_addr);
                   2413: return 0;
                   2414: 
                   2415: va-return-longlong ( d -- )    gforth va_return_longlong
                   2416: va_return_longlong(clist, d);
                   2417: return 0;
                   2418: 
                   2419: va-return-float ( r -- )       gforth va_return_float
                   2420: va_return_float(clist, r);
                   2421: return 0;
                   2422: 
                   2423: va-return-double ( r -- )      gforth va_return_double
                   2424: va_return_double(clist, r);
                   2425: return 0;
                   2426: 
1.142   ! pazsan   2427: \+
        !          2428: 
        !          2429: \+OLDCALL
1.131     pazsan   2430: 
1.1       anton    2431: define(`uploop',
                   2432:        `pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
                   2433: define(`_uploop',
                   2434:        `ifelse($1, `$3', `$5',
                   2435:               `$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
                   2436: \ argflist(argnum): Forth argument list
                   2437: define(argflist,
                   2438:        `ifelse($1, 0, `',
                   2439:                `uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
                   2440: \ argdlist(argnum): declare C's arguments
                   2441: define(argdlist,
                   2442:        `ifelse($1, 0, `',
                   2443:                `uploop(`_i', 1, $1, `Cell, ', `Cell')')')
                   2444: \ argclist(argnum): pass C's arguments
                   2445: define(argclist,
                   2446:        `ifelse($1, 0, `',
                   2447:                `uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
                   2448: \ icall(argnum)
                   2449: define(icall,
1.47      anton    2450: `icall$1       ( argflist($1)u -- uret )       gforth
1.9       pazsan   2451: uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2452: 
                   2453: ')
                   2454: define(fcall,
1.47      anton    2455: `fcall$1       ( argflist($1)u -- rret )       gforth
1.9       pazsan   2456: rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2457: 
                   2458: ')
                   2459: 
1.46      pazsan   2460: \ close ' to keep fontify happy
1.1       anton    2461: 
                   2462: uploop(i, 0, 7, `icall(i)')
                   2463: icall(20)
                   2464: uploop(i, 0, 7, `fcall(i)')
                   2465: fcall(20)
                   2466: 
1.15      pazsan   2467: \+
1.131     pazsan   2468: \+
1.1       anton    2469: 
1.142   ! pazsan   2470: \g peephole
1.46      pazsan   2471: 
1.112     pazsan   2472: \+peephole
                   2473: 
1.119     anton    2474: compile-prim1 ( a_prim -- ) gforth compile_prim1
                   2475: ""compile prim (incl. immargs) at @var{a_prim}""
                   2476: compile_prim1(a_prim);
                   2477: 
                   2478: finish-code ( -- ) gforth finish_code
                   2479: ""Perform delayed steps in code generation (branch resolution, I-cache
                   2480: flushing).""
                   2481: finish_code();
                   2482: 
                   2483: forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
                   2484: f = forget_dyncode(c_code);
                   2485: 
                   2486: decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
                   2487: ""a_prim is the code address of the primitive that has been
                   2488: compile_prim1ed to a_code""
1.121     anton    2489: a_prim = (Cell *)decompile_code((Label)a_code);
1.119     anton    2490: 
1.112     pazsan   2491: \ set-next-code and call2 do not appear in images and can be
                   2492: \ renumbered arbitrarily
1.46      pazsan   2493: 
1.112     pazsan   2494: set-next-code ( #w -- ) gforth set_next_code
                   2495: #ifdef NO_IP
                   2496: next_code = (Label)w;
                   2497: #endif
1.34      jwilke   2498: 
1.112     pazsan   2499: call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
                   2500: /* call with explicit return address */
                   2501: #ifdef NO_IP
                   2502: INST_TAIL;
                   2503: JUMP(a_callee);
1.45      anton    2504: #else
1.112     pazsan   2505: assert(0);
1.45      anton    2506: #endif
1.131     pazsan   2507: 
                   2508: tag-offsets ( -- a_addr ) gforth tag_offsets
                   2509: extern Cell groups[32];
                   2510: a_addr = groups;
1.51      anton    2511: 
1.54      pazsan   2512: \+
1.128     anton    2513: 
                   2514: \g static_super
                   2515: 
1.130     anton    2516: \C #if !defined(GFORTH_DEBUGGING) && !defined(INDIRECT_THREADED) && !defined(DOUBLY_INDIRECT) && !defined(VM_PROFILING)
                   2517: 
1.112     pazsan   2518: include(peeprules.vmg)
1.130     anton    2519: 
                   2520: \C #endif
1.54      pazsan   2521: 
1.112     pazsan   2522: \g end

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