Annotation of gforth/prim, revision 1.217

1.1       anton       1: \ Gforth primitives
                      2: 
1.204     anton       3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006 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 
1.172     anton     103: \E data-stack   stack-prefix S:
                    104: \E fp-stack     stack-prefix F:
1.67      anton     105: \E return-stack stack-prefix R:
                    106: \E inst-stream  stack-prefix #
                    107: \E 
                    108: \E set-current
1.97      anton     109: \E store-optimization on
1.109     anton     110: \E ' noop tail-nextp2 ! \ now INST_TAIL just stores, but does not jump
1.128     anton     111: \E
                    112: \E include-skipped-insts on \ static superinsts include cells for components
                    113: \E                          \ useful for dynamic programming and
                    114: \E                          \ superinsts across entry points
1.67      anton     115: 
1.1       anton     116: \ 
                    117: \ 
                    118: \ 
                    119: \ In addition the following names can be used:
                    120: \ ip   the instruction pointer
                    121: \ sp   the data stack pointer
                    122: \ rp   the parameter stack pointer
                    123: \ lp   the locals stack pointer
                    124: \ NEXT executes NEXT
                    125: \ cfa  
                    126: \ NEXT1        executes NEXT1
                    127: \ FLAG(x)      makes a Forth flag from a C flag
                    128: \ 
                    129: \ 
                    130: \ 
                    131: \ Percentages in comments are from Koopmans book: average/maximum use
                    132: \ (taken from four, not very representative benchmarks)
                    133: \ 
                    134: \ 
                    135: \ 
                    136: \ To do:
                    137: \ 
                    138: \ throw execute, cfa and NEXT1 out?
                    139: \ macroize *ip, ip++, *ip++ (pipelining)?
                    140: 
1.145     anton     141: \ Stack caching setup
                    142: 
1.173     anton     143: ifdef(`STACK_CACHE_FILE', `include(STACK_CACHE_FILE)', `include(cache0.vmg)')
1.145     anton     144: 
1.1       anton     145: \ these m4 macros would collide with identifiers
                    146: undefine(`index')
                    147: undefine(`shift')
1.78      pazsan    148: undefine(`symbols')
1.1       anton     149: 
1.140     anton     150: \F 0 [if]
                    151: 
1.139     anton     152: \ run-time routines for non-primitives.  They are defined as
                    153: \ primitives, because that simplifies things.
                    154: 
                    155: (docol)        ( -- R:a_retaddr )      gforth-internal paren_docol
                    156: ""run-time routine for colon definitions""
1.148     anton     157: #ifdef NO_IP
                    158: a_retaddr = next_code;
                    159: INST_TAIL;
                    160: goto **(Label *)PFA(CFA);
                    161: #else /* !defined(NO_IP) */
1.141     anton     162: a_retaddr = (Cell *)IP;
1.139     anton     163: SET_IP((Xt *)PFA(CFA));
1.148     anton     164: #endif /* !defined(NO_IP) */
1.139     anton     165: 
                    166: (docon) ( -- w )       gforth-internal paren_docon
                    167: ""run-time routine for constants""
                    168: w = *(Cell *)PFA(CFA);
1.148     anton     169: #ifdef NO_IP
                    170: INST_TAIL;
                    171: goto *next_code;
                    172: #endif /* defined(NO_IP) */
1.139     anton     173: 
                    174: (dovar) ( -- a_body )  gforth-internal paren_dovar
                    175: ""run-time routine for variables and CREATEd words""
                    176: a_body = PFA(CFA);
1.148     anton     177: #ifdef NO_IP
                    178: INST_TAIL;
                    179: goto *next_code;
                    180: #endif /* defined(NO_IP) */
1.139     anton     181: 
                    182: (douser) ( -- a_user ) gforth-internal paren_douser
                    183: ""run-time routine for constants""
                    184: a_user = (Cell *)(up+*(Cell *)PFA(CFA));
1.148     anton     185: #ifdef NO_IP
                    186: INST_TAIL;
                    187: goto *next_code;
                    188: #endif /* defined(NO_IP) */
1.139     anton     189: 
                    190: (dodefer) ( -- )       gforth-internal paren_dodefer
                    191: ""run-time routine for deferred words""
1.148     anton     192: #ifndef NO_IP
1.141     anton     193: ip=IP; /* undo any ip updating that may have been performed by NEXT_P0 */
1.148     anton     194: #endif /* !defined(NO_IP) */
1.141     anton     195: SUPER_END; /* !! probably unnecessary and may lead to measurement errors */
1.161     anton     196: VM_JUMP(EXEC1(*(Xt *)PFA(CFA)));
1.139     anton     197: 
                    198: (dofield) ( n1 -- n2 ) gforth-internal paren_field
                    199: ""run-time routine for fields""
                    200: n2 = n1 + *(Cell *)PFA(CFA);
1.148     anton     201: #ifdef NO_IP
                    202: INST_TAIL;
                    203: goto *next_code;
                    204: #endif /* defined(NO_IP) */
1.139     anton     205: 
                    206: (dodoes) ( -- a_body R:a_retaddr )     gforth-internal paren_dodoes
                    207: ""run-time routine for @code{does>}-defined words""
1.148     anton     208: #ifdef NO_IP
                    209: a_retaddr = next_code;
                    210: a_body = PFA(CFA);
                    211: INST_TAIL;
1.211     pazsan    212: #ifdef DEBUG
                    213: fprintf(stderr, "dodoes to %x, push %x\n", a_retaddr, a_body);
                    214: #endif
1.148     anton     215: goto **(Label *)DOES_CODE1(CFA);
                    216: #else /* !defined(NO_IP) */
1.141     anton     217: a_retaddr = (Cell *)IP;
1.139     anton     218: a_body = PFA(CFA);
1.211     pazsan    219: #ifdef DEBUG
                    220: fprintf(stderr, "dodoes to %x, push %x\n", a_retaddr, a_body);
                    221: #endif
1.139     anton     222: SET_IP(DOES_CODE1(CFA));
1.148     anton     223: #endif /* !defined(NO_IP) */
1.139     anton     224: 
                    225: (does-handler) ( -- )  gforth-internal paren_does_handler
                    226: ""just a slot to have an encoding for the DOESJUMP, 
                    227: which is no longer used anyway (!! eliminate this)""
1.140     anton     228: 
                    229: \F [endif]
1.139     anton     230: 
1.83      pazsan    231: \g control
                    232: 
1.47      anton     233: noop   ( -- )          gforth
1.1       anton     234: :
                    235:  ;
                    236: 
1.112     pazsan    237: call   ( #a_callee -- R:a_retaddr )    new
                    238: ""Call callee (a variant of docol with inline argument).""
                    239: #ifdef NO_IP
1.148     anton     240: assert(0);
1.112     pazsan    241: INST_TAIL;
                    242: JUMP(a_callee);
                    243: #else
                    244: #ifdef DEBUG
                    245:     {
                    246:       CFA_TO_NAME((((Cell *)a_callee)-2));
                    247:       fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
                    248:              len,name);
                    249:     }
                    250: #endif
                    251: a_retaddr = (Cell *)IP;
                    252: SET_IP((Xt *)a_callee);
                    253: #endif
1.1       anton     254: 
1.47      anton     255: execute        ( xt -- )               core
1.29      crook     256: ""Perform the semantics represented by the execution token, @i{xt}.""
1.210     pazsan    257: #ifdef DEBUG
                    258: fprintf(stderr, "execute %08x\n", xt);
                    259: #endif
1.102     anton     260: #ifndef NO_IP
1.1       anton     261: ip=IP;
1.102     anton     262: #endif
1.76      anton     263: SUPER_END;
1.161     anton     264: VM_JUMP(EXEC1(xt));
1.1       anton     265: 
1.47      anton     266: perform        ( a_addr -- )   gforth
1.55      anton     267: ""@code{@@ execute}.""
1.1       anton     268: /* and pfe */
1.102     anton     269: #ifndef NO_IP
1.1       anton     270: ip=IP;
1.102     anton     271: #endif
1.76      anton     272: SUPER_END;
1.161     anton     273: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.1       anton     274: :
                    275:  @ execute ;
                    276: 
1.112     pazsan    277: ;s     ( R:w -- )              gforth  semis
                    278: ""The primitive compiled by @code{EXIT}.""
                    279: #ifdef NO_IP
                    280: INST_TAIL;
                    281: goto *(void *)w;
                    282: #else
                    283: SET_IP((Xt *)w);
                    284: #endif
                    285: 
                    286: unloop ( R:w1 R:w2 -- )        core
                    287: /* !! alias for 2rdrop */
                    288: :
                    289:  r> rdrop rdrop >r ;
                    290: 
                    291: lit-perform    ( #a_addr -- )  new     lit_perform
                    292: #ifndef NO_IP
                    293: ip=IP;
                    294: #endif
                    295: SUPER_END;
1.161     anton     296: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.112     pazsan    297: 
                    298: does-exec ( #a_cfa -- R:nest a_pfa )   new     does_exec
                    299: #ifdef NO_IP
                    300: /* compiled to LIT CALL by compile_prim */
                    301: assert(0);
                    302: #else
                    303: a_pfa = PFA(a_cfa);
                    304: nest = (Cell)IP;
                    305: #ifdef DEBUG
                    306:     {
                    307:       CFA_TO_NAME(a_cfa);
                    308:       fprintf(stderr,"%08lx: does %08lx %.*s\n",
                    309:              (Cell)ip,(Cell)a_cfa,len,name);
                    310:     }
                    311: #endif
                    312: SET_IP(DOES_CODE1(a_cfa));
                    313: #endif
                    314: 
1.15      pazsan    315: \+glocals
1.1       anton     316: 
1.112     pazsan    317: branch-lp+!# ( #a_target #nlocals -- ) gforth  branch_lp_plus_store_number
1.1       anton     318: /* this will probably not be used */
1.68      anton     319: lp += nlocals;
1.112     pazsan    320: #ifdef NO_IP
                    321: INST_TAIL;
                    322: JUMP(a_target);
                    323: #else
                    324: SET_IP((Xt *)a_target);
                    325: #endif
1.1       anton     326: 
1.15      pazsan    327: \+
1.1       anton     328: 
1.112     pazsan    329: branch ( #a_target -- )        gforth
                    330: #ifdef NO_IP
                    331: INST_TAIL;
                    332: JUMP(a_target);
                    333: #else
                    334: SET_IP((Xt *)a_target);
                    335: #endif
1.1       anton     336: :
1.112     pazsan    337:  r> @ >r ;
1.1       anton     338: 
1.112     pazsan    339: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
1.1       anton     340: \ this is non-syntactical: code must open a brace that is closed by the macro
                    341: define(condbranch,
1.159     anton     342: $1 ( `#'a_target $2 ) $3
                    343: $4     #ifdef NO_IP
                    344: INST_TAIL;
                    345: #endif
                    346: $5     #ifdef NO_IP
                    347: JUMP(a_target);
                    348: #else
                    349: SET_IP((Xt *)a_target);
1.214     anton     350: ifelse(condbranch_opt,`1',`INST_TAIL; NEXT_P2;',`/* condbranch_opt=0 */')
1.159     anton     351: #endif
                    352: }
1.214     anton     353: ifelse(condbranch_opt,`1',`SUPER_CONTINUE;',`/* condbranch_opt=0 */')
1.159     anton     354: $6
                    355: 
                    356: \+glocals
                    357: 
                    358: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
                    359: $4     #ifdef NO_IP
                    360: INST_TAIL;
                    361: #endif
                    362: $5     lp += nlocals;
                    363: #ifdef NO_IP
                    364: JUMP(a_target);
                    365: #else
                    366: SET_IP((Xt *)a_target);
1.214     anton     367: ifelse(condbranch_opt,`1',`INST_TAIL; NEXT_P2;',`/* condbranch_opt=0 */')
1.159     anton     368: #endif
                    369: }
1.214     anton     370: ifelse(condbranch_opt,`1',`SUPER_CONTINUE;',`/* condbranch_opt=0 */')
1.1       anton     371: 
1.15      pazsan    372: \+
1.1       anton     373: )
                    374: 
1.68      anton     375: condbranch(?branch,f --,f83    question_branch,
1.112     pazsan    376: ,if (f==0) {
1.5       jwilke    377: ,:
1.112     pazsan    378:  0= dup 0=          \ !f f
                    379:  r> tuck cell+      \ !f branchoffset f IP+
                    380:  and -rot @ and or  \ f&IP+|!f&branch
1.5       jwilke    381:  >r ;)
1.1       anton     382: 
                    383: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
                    384: \ is only used in if's (yet)
                    385: 
1.15      pazsan    386: \+xconds
1.1       anton     387: 
1.172     anton     388: ?dup-?branch   ( #a_target f -- S:... )        new     question_dupe_question_branch
1.1       anton     389: ""The run-time procedure compiled by @code{?DUP-IF}.""
                    390: if (f==0) {
1.112     pazsan    391: #ifdef NO_IP
                    392: INST_TAIL;
                    393: JUMP(a_target);
                    394: #else
                    395: SET_IP((Xt *)a_target);
                    396: #endif
1.174     anton     397: } else {
1.172     anton     398: sp--;
                    399: sp[0]=f;
1.174     anton     400: }
1.1       anton     401: 
1.172     anton     402: ?dup-0=-?branch ( #a_target f -- S:... ) new   question_dupe_zero_equals_question_branch
1.1       anton     403: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
                    404: if (f!=0) {
                    405:   sp--;
1.172     anton     406:   sp[0]=f;
1.112     pazsan    407: #ifdef NO_IP
                    408:   JUMP(a_target);
                    409: #else
                    410:   SET_IP((Xt *)a_target);
                    411: #endif
1.1       anton     412: }
                    413: 
1.15      pazsan    414: \+
1.31      jwilke    415: \fhas? skiploopprims 0= [IF]
1.1       anton     416: 
1.68      anton     417: condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
1.65      anton     418: n2=n1-1;
1.112     pazsan    419: ,if (n1) {
1.1       anton     420: ,:
                    421:  r> r> dup 1- >r
1.112     pazsan    422:  IF @ >r ELSE cell+ >r THEN ;)
1.1       anton     423: 
1.68      anton     424: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth        paren_loop,
1.65      anton     425: n2=n1+1;
1.112     pazsan    426: ,if (n2 != nlimit) {
1.1       anton     427: ,:
                    428:  r> r> 1+ r> 2dup =
                    429:  IF >r 1- >r cell+ >r
1.112     pazsan    430:  ELSE >r >r @ >r THEN ;)
1.1       anton     431: 
1.68      anton     432: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
1.1       anton     433: /* !! check this thoroughly */
                    434: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
                    435: /* dependent upon two's complement arithmetic */
1.65      anton     436: Cell olddiff = n1-nlimit;
                    437: n2=n1+n;       
1.149     anton     438: ,if (((olddiff^(olddiff+n))    /* the limit is not crossed */
                    439:      &(olddiff^n))            /* OR it is a wrap-around effect */
                    440:     >=0) { /* & is used to avoid having two branches for gforth-native */
1.1       anton     441: ,:
                    442:  r> swap
                    443:  r> r> 2dup - >r
                    444:  2 pick r@ + r@ xor 0< 0=
                    445:  3 pick r> xor 0< 0= or
1.112     pazsan    446:  IF    >r + >r @ >r
1.1       anton     447:  ELSE  >r >r drop cell+ >r THEN ;)
                    448: 
1.15      pazsan    449: \+xconds
1.1       anton     450: 
1.68      anton     451: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
1.65      anton     452: UCell olddiff = n1-nlimit;
                    453: n2=n1-u;
1.112     pazsan    454: ,if (olddiff>u) {
1.1       anton     455: ,)
                    456: 
1.68      anton     457: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth    paren_symmetric_plus_loop,
1.1       anton     458: ""The run-time procedure compiled by S+LOOP. It loops until the index
                    459: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
                    460: version of (+LOOP).""
                    461: /* !! check this thoroughly */
1.65      anton     462: Cell diff = n1-nlimit;
1.1       anton     463: Cell newdiff = diff+n;
                    464: if (n<0) {
                    465:     diff = -diff;
                    466:     newdiff = -newdiff;
                    467: }
1.65      anton     468: n2=n1+n;
1.149     anton     469: ,if (((~diff)|newdiff)<0) { /* use | to avoid two branches for gforth-native */
1.1       anton     470: ,)
                    471: 
1.15      pazsan    472: \+
1.1       anton     473: 
1.112     pazsan    474: (for)   ( ncount -- R:nlimit R:ncount )         cmFORTH         paren_for
1.1       anton     475: /* or (for) = >r -- collides with unloop! */
1.65      anton     476: nlimit=0;
1.1       anton     477: :
                    478:  r> swap 0 >r >r >r ;
                    479: 
1.112     pazsan    480: (do)    ( nlimit nstart -- R:nlimit R:nstart )  gforth          paren_do
1.1       anton     481: :
                    482:  r> swap rot >r >r >r ;
                    483: 
1.112     pazsan    484: (?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth  paren_question_do
                    485: #ifdef NO_IP
                    486:     INST_TAIL;
                    487: #endif
1.1       anton     488: if (nstart == nlimit) {
1.112     pazsan    489: #ifdef NO_IP
                    490:     JUMP(a_target);
                    491: #else
                    492:     SET_IP((Xt *)a_target);
                    493: #endif
1.1       anton     494: }
                    495: :
                    496:   2dup =
                    497:   IF   r> swap rot >r >r
1.112     pazsan    498:        @ >r
1.1       anton     499:   ELSE r> swap rot >r >r
                    500:        cell+ >r
                    501:   THEN ;                               \ --> CORE-EXT
                    502: 
1.15      pazsan    503: \+xconds
1.1       anton     504: 
1.112     pazsan    505: (+do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
                    506: #ifdef NO_IP
                    507:     INST_TAIL;
                    508: #endif
1.1       anton     509: if (nstart >= nlimit) {
1.112     pazsan    510: #ifdef NO_IP
                    511:     JUMP(a_target);
                    512: #else
                    513:     SET_IP((Xt *)a_target);
                    514: #endif
1.1       anton     515: }
                    516: :
                    517:  swap 2dup
                    518:  r> swap >r swap >r
                    519:  >=
                    520:  IF
1.112     pazsan    521:      @
1.1       anton     522:  ELSE
                    523:      cell+
                    524:  THEN  >r ;
                    525: 
1.112     pazsan    526: (u+do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
                    527: #ifdef NO_IP
                    528:     INST_TAIL;
                    529: #endif
1.1       anton     530: if (ustart >= ulimit) {
1.112     pazsan    531: #ifdef NO_IP
                    532: JUMP(a_target);
                    533: #else
                    534: SET_IP((Xt *)a_target);
                    535: #endif
1.1       anton     536: }
                    537: :
                    538:  swap 2dup
                    539:  r> swap >r swap >r
                    540:  u>=
                    541:  IF
1.112     pazsan    542:      @
1.1       anton     543:  ELSE
                    544:      cell+
                    545:  THEN  >r ;
                    546: 
1.112     pazsan    547: (-do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
                    548: #ifdef NO_IP
                    549:     INST_TAIL;
                    550: #endif
1.1       anton     551: if (nstart <= nlimit) {
1.112     pazsan    552: #ifdef NO_IP
                    553: JUMP(a_target);
                    554: #else
                    555: SET_IP((Xt *)a_target);
                    556: #endif
1.1       anton     557: }
                    558: :
                    559:  swap 2dup
                    560:  r> swap >r swap >r
                    561:  <=
                    562:  IF
1.112     pazsan    563:      @
1.1       anton     564:  ELSE
                    565:      cell+
                    566:  THEN  >r ;
                    567: 
1.112     pazsan    568: (u-do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
                    569: #ifdef NO_IP
                    570:     INST_TAIL;
                    571: #endif
1.1       anton     572: if (ustart <= ulimit) {
1.112     pazsan    573: #ifdef NO_IP
                    574: JUMP(a_target);
                    575: #else
                    576: SET_IP((Xt *)a_target);
                    577: #endif
1.1       anton     578: }
                    579: :
                    580:  swap 2dup
                    581:  r> swap >r swap >r
                    582:  u<=
                    583:  IF
1.112     pazsan    584:      @
1.1       anton     585:  ELSE
                    586:      cell+
                    587:  THEN  >r ;
                    588: 
1.15      pazsan    589: \+
1.1       anton     590: 
1.5       jwilke    591: \ don't make any assumptions where the return stack is!!
                    592: \ implement this in machine code if it should run quickly!
                    593: 
1.65      anton     594: i      ( R:n -- R:n n )                core
1.1       anton     595: :
1.5       jwilke    596: \ rp@ cell+ @ ;
                    597:   r> r> tuck >r >r ;
1.1       anton     598: 
1.65      anton     599: i'     ( R:w R:w2 -- R:w R:w2 w )              gforth          i_tick
1.1       anton     600: :
1.5       jwilke    601: \ rp@ cell+ cell+ @ ;
                    602:   r> r> r> dup itmp ! >r >r >r itmp @ ;
                    603: variable itmp
1.1       anton     604: 
1.215     anton     605: j      ( R:w R:w1 R:w2 -- w R:w R:w1 R:w2 )    core
1.1       anton     606: :
1.5       jwilke    607: \ rp@ cell+ cell+ cell+ @ ;
                    608:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
                    609: [IFUNDEF] itmp variable itmp [THEN]
1.1       anton     610: 
1.215     anton     611: k      ( R:w R:w1 R:w2 R:w3 R:w4 -- w R:w R:w1 R:w2 R:w3 R:w4 )        gforth
1.1       anton     612: :
1.5       jwilke    613: \ rp@ [ 5 cells ] Literal + @ ;
                    614:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
                    615: [IFUNDEF] itmp variable itmp [THEN]
1.31      jwilke    616: 
                    617: \f[THEN]
1.1       anton     618: 
                    619: \ digit is high-level: 0/0%
                    620: 
1.83      pazsan    621: \g strings
                    622: 
1.47      anton     623: move   ( c_from c_to ucount -- )               core
1.52      anton     624: ""Copy the contents of @i{ucount} aus at @i{c-from} to
1.33      anton     625: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
1.52      anton     626: /* !! note that the standard specifies addr, not c-addr */
1.1       anton     627: memmove(c_to,c_from,ucount);
                    628: /* make an Ifdef for bsd and others? */
                    629: :
                    630:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
                    631: 
1.47      anton     632: cmove  ( c_from c_to u -- )    string  c_move
1.33      anton     633: ""Copy the contents of @i{ucount} characters from data space at
                    634: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    635: from low address to high address; i.e., for overlapping areas it is
                    636: safe if @i{c-to}=<@i{c-from}.""
1.125     anton     637: cmove(c_from,c_to,u);
1.1       anton     638: :
                    639:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
                    640: 
1.47      anton     641: cmove> ( c_from c_to u -- )    string  c_move_up
1.33      anton     642: ""Copy the contents of @i{ucount} characters from data space at
                    643: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    644: from high address to low address; i.e., for overlapping areas it is
                    645: safe if @i{c-to}>=@i{c-from}.""
1.125     anton     646: cmove_up(c_from,c_to,u);
1.1       anton     647: :
                    648:  dup 0= IF  drop 2drop exit  THEN
                    649:  rot over + -rot bounds swap 1-
                    650:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
                    651: 
1.47      anton     652: fill   ( c_addr u c -- )       core
1.52      anton     653: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
1.1       anton     654: memset(c_addr,c,u);
                    655: :
                    656:  -rot bounds
                    657:  ?DO  dup I c!  LOOP  drop ;
                    658: 
1.47      anton     659: compare        ( c_addr1 u1 c_addr2 u2 -- n )  string
1.29      crook     660: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    661: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
1.1       anton     662: is 1. Currently this is based on the machine's character
1.26      crook     663: comparison. In the future, this may change to consider the current
1.1       anton     664: locale and its collation order.""
1.46      pazsan    665: /* close ' to keep fontify happy */ 
1.125     anton     666: n = compare(c_addr1, u1, c_addr2, u2);
1.1       anton     667: :
1.43      pazsan    668:  rot 2dup swap - >r min swap -text dup
                    669:  IF  rdrop  ELSE  drop r> sgn  THEN ;
1.143     pazsan    670: : -text ( c_addr1 u c_addr2 -- n )
                    671:  swap bounds
                    672:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    673:  ELSE  c@ I c@ - unloop  THEN  sgn ;
1.43      pazsan    674: : sgn ( n -- -1/0/1 )
                    675:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     676: 
1.125     anton     677: \ -text is only used by replaced primitives now; move it elsewhere
                    678: \ -text        ( c_addr1 u c_addr2 -- n )      new     dash_text
                    679: \ n = memcmp(c_addr1, c_addr2, u);
                    680: \ if (n<0)
                    681: \   n = -1;
                    682: \ else if (n>0)
                    683: \   n = 1;
                    684: \ :
                    685: \  swap bounds
                    686: \  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    687: \  ELSE  c@ I c@ - unloop  THEN  sgn ;
                    688: \ : sgn ( n -- -1/0/1 )
                    689: \  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     690: 
1.47      anton     691: toupper        ( c1 -- c2 )    gforth
1.29      crook     692: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
1.25      anton     693: is the equivalent upper-case character. All other characters are unchanged.""
1.1       anton     694: c2 = toupper(c1);
                    695: :
                    696:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
                    697: 
1.188     pazsan    698: capscompare    ( c_addr1 u1 c_addr2 u2 -- n )  string
                    699: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    700: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
                    701: is 1. Currently this is based on the machine's character
                    702: comparison. In the future, this may change to consider the current
                    703: locale and its collation order.""
                    704: /* close ' to keep fontify happy */ 
                    705: n = capscompare(c_addr1, u1, c_addr2, u2);
                    706: 
1.47      anton     707: /string        ( c_addr1 u1 n -- c_addr2 u2 )  string  slash_string
1.29      crook     708: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
1.27      crook     709: characters from the start of the string.""
1.1       anton     710: c_addr2 = c_addr1+n;
                    711: u2 = u1-n;
                    712: :
                    713:  tuck - >r + r> dup 0< IF  - 0  THEN ;
                    714: 
1.83      pazsan    715: \g arith
                    716: 
1.112     pazsan    717: lit    ( #w -- w )             gforth
                    718: :
                    719:  r> dup @ swap cell+ >r ;
                    720: 
1.47      anton     721: +      ( n1 n2 -- n )          core    plus
1.1       anton     722: n = n1+n2;
                    723: 
1.112     pazsan    724: \ lit+ / lit_plus = lit +
                    725: 
                    726: lit+   ( n1 #n2 -- n )         new     lit_plus
1.211     pazsan    727: #ifdef DEBUG
                    728: fprintf(stderr, "lit+ %08x\n", n2);
                    729: #endif
1.112     pazsan    730: n=n1+n2;
                    731: 
1.1       anton     732: \ PFE-0.9.14 has it differently, but the next release will have it as follows
1.47      anton     733: under+ ( n1 n2 n3 -- n n2 )    gforth  under_plus
1.29      crook     734: ""add @i{n3} to @i{n1} (giving @i{n})""
1.1       anton     735: n = n1+n3;
                    736: :
                    737:  rot + swap ;
                    738: 
1.47      anton     739: -      ( n1 n2 -- n )          core    minus
1.1       anton     740: n = n1-n2;
                    741: :
                    742:  negate + ;
                    743: 
1.47      anton     744: negate ( n1 -- n2 )            core
1.1       anton     745: /* use minus as alias */
                    746: n2 = -n1;
                    747: :
                    748:  invert 1+ ;
                    749: 
1.47      anton     750: 1+     ( n1 -- n2 )            core            one_plus
1.1       anton     751: n2 = n1+1;
                    752: :
                    753:  1 + ;
                    754: 
1.47      anton     755: 1-     ( n1 -- n2 )            core            one_minus
1.1       anton     756: n2 = n1-1;
                    757: :
                    758:  1 - ;
                    759: 
1.47      anton     760: max    ( n1 n2 -- n )  core
1.1       anton     761: if (n1<n2)
                    762:   n = n2;
                    763: else
                    764:   n = n1;
                    765: :
                    766:  2dup < IF swap THEN drop ;
                    767: 
1.47      anton     768: min    ( n1 n2 -- n )  core
1.1       anton     769: if (n1<n2)
                    770:   n = n1;
                    771: else
                    772:   n = n2;
                    773: :
                    774:  2dup > IF swap THEN drop ;
                    775: 
1.52      anton     776: abs    ( n -- u )      core
                    777: if (n<0)
                    778:   u = -n;
1.1       anton     779: else
1.52      anton     780:   u = n;
1.1       anton     781: :
                    782:  dup 0< IF negate THEN ;
                    783: 
1.47      anton     784: *      ( n1 n2 -- n )          core    star
1.1       anton     785: n = n1*n2;
                    786: :
                    787:  um* drop ;
                    788: 
1.47      anton     789: /      ( n1 n2 -- n )          core    slash
1.1       anton     790: n = n1/n2;
1.200     anton     791: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     792:   throw(BALL_DIVZERO);
1.200     anton     793: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     794:   throw(BALL_RESULTRANGE);
1.197     anton     795: if (FLOORED_DIV && ((n1^n2) < 0) && (n1%n2 != 0))
                    796:   n--;
1.1       anton     797: :
                    798:  /mod nip ;
                    799: 
1.47      anton     800: mod    ( n1 n2 -- n )          core
1.1       anton     801: n = n1%n2;
1.200     anton     802: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     803:   throw(BALL_DIVZERO);
1.200     anton     804: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     805:   throw(BALL_RESULTRANGE);
1.169     pazsan    806: if(FLOORED_DIV && ((n1^n2) < 0) && n!=0) n += n2;
1.1       anton     807: :
                    808:  /mod drop ;
                    809: 
1.47      anton     810: /mod   ( n1 n2 -- n3 n4 )              core            slash_mod
1.1       anton     811: n4 = n1/n2;
                    812: n3 = n1%n2; /* !! is this correct? look into C standard! */
1.200     anton     813: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     814:   throw(BALL_DIVZERO);
1.200     anton     815: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     816:   throw(BALL_RESULTRANGE);
1.169     pazsan    817: if (FLOORED_DIV && ((n1^n2) < 0) && n3!=0) {
1.162     pazsan    818:   n4--;
                    819:   n3+=n2;
                    820: }
1.1       anton     821: :
                    822:  >r s>d r> fm/mod ;
                    823: 
1.162     pazsan    824: */mod  ( n1 n2 n3 -- n4 n5 )   core    star_slash_mod
                    825: ""n1*n2=n3*n5+n4, with the intermediate result (n1*n2) being double.""
                    826: #ifdef BUGGY_LL_MUL
                    827: DCell d = mmul(n1,n2);
                    828: #else
                    829: DCell d = (DCell)n1 * (DCell)n2;
                    830: #endif
1.202     anton     831: #ifdef ASM_SM_SLASH_REM
                    832: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, n4, n5);
1.207     anton     833: if (FLOORED_DIV && ((DHI(d)^n3)<0) && n4!=0) {
1.202     anton     834:   if (CHECK_DIVISION && n5 == CELL_MIN)
                    835:     throw(BALL_RESULTRANGE);
                    836:   n5--;
                    837:   n4+=n3;
                    838: }
                    839: #else
1.207     anton     840: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.162     pazsan    841: n4=DHI(r);
                    842: n5=DLO(r);
                    843: #endif
                    844: :
                    845:  >r m* r> fm/mod ;
                    846: 
                    847: */     ( n1 n2 n3 -- n4 )      core    star_slash
                    848: ""n4=(n1*n2)/n3, with the intermediate result being double.""
                    849: #ifdef BUGGY_LL_MUL
                    850: DCell d = mmul(n1,n2);
                    851: #else
                    852: DCell d = (DCell)n1 * (DCell)n2;
                    853: #endif
1.202     anton     854: #ifdef ASM_SM_SLASH_REM
                    855: Cell remainder;
                    856: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, remainder, n4);
1.207     anton     857: if (FLOORED_DIV && ((DHI(d)^n3)<0) && remainder!=0) {
1.202     anton     858:   if (CHECK_DIVISION && n4 == CELL_MIN)
                    859:     throw(BALL_RESULTRANGE);
                    860:   n4--;
                    861: }
                    862: #else
1.207     anton     863: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.168     pazsan    864: n4=DLO(r);
1.162     pazsan    865: #endif
                    866: :
                    867:  */mod nip ;
                    868: 
1.47      anton     869: 2*     ( n1 -- n2 )            core            two_star
1.52      anton     870: ""Shift left by 1; also works on unsigned numbers""
1.1       anton     871: n2 = 2*n1;
                    872: :
                    873:  dup + ;
                    874: 
1.47      anton     875: 2/     ( n1 -- n2 )            core            two_slash
1.52      anton     876: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                    877: division by 2 (note that @code{/} not necessarily floors).""
1.1       anton     878: n2 = n1>>1;
                    879: :
                    880:  dup MINI and IF 1 ELSE 0 THEN
1.187     pazsan    881:  [ bits/char cell * 1- ] literal 
1.5       jwilke    882:  0 DO 2* swap dup 2* >r MINI and 
1.1       anton     883:      IF 1 ELSE 0 THEN or r> swap
                    884:  LOOP nip ;
                    885: 
1.47      anton     886: fm/mod ( d1 n1 -- n2 n3 )              core            f_m_slash_mod
1.29      crook     887: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
1.201     anton     888: #ifdef ASM_SM_SLASH_REM
1.203     anton     889: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.169     pazsan    890: if (((DHI(d1)^n1)<0) && n2!=0) {
1.200     anton     891:   if (CHECK_DIVISION && n3 == CELL_MIN)
1.198     anton     892:     throw(BALL_RESULTRANGE);
1.165     anton     893:   n3--;
                    894:   n2+=n1;
                    895: }
1.201     anton     896: #else /* !defined(ASM_SM_SLASH_REM) */
                    897: DCell r = fmdiv(d1,n1);
                    898: n2=DHI(r);
                    899: n3=DLO(r);
1.203     anton     900: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     901: :
                    902:  dup >r dup 0< IF  negate >r dnegate r>  THEN
                    903:  over       0< IF  tuck + swap  THEN
                    904:  um/mod
                    905:  r> 0< IF  swap negate swap  THEN ;
                    906: 
1.47      anton     907: sm/rem ( d1 n1 -- n2 n3 )              core            s_m_slash_rem
1.29      crook     908: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
1.165     anton     909: #ifdef ASM_SM_SLASH_REM
1.203     anton     910: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.165     anton     911: #else /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     912: DCell r = smdiv(d1,n1);
1.162     pazsan    913: n2=DHI(r);
                    914: n3=DLO(r);
1.165     anton     915: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     916: :
                    917:  over >r dup >r abs -rot
                    918:  dabs rot um/mod
                    919:  r> r@ xor 0< IF       negate       THEN
                    920:  r>        0< IF  swap negate swap  THEN ;
                    921: 
1.47      anton     922: m*     ( n1 n2 -- d )          core    m_star
1.158     pazsan    923: #ifdef BUGGY_LL_MUL
1.1       anton     924: d = mmul(n1,n2);
                    925: #else
                    926: d = (DCell)n1 * (DCell)n2;
                    927: #endif
                    928: :
                    929:  2dup      0< and >r
                    930:  2dup swap 0< and >r
                    931:  um* r> - r> - ;
                    932: 
1.47      anton     933: um*    ( u1 u2 -- ud )         core    u_m_star
1.1       anton     934: /* use u* as alias */
1.158     pazsan    935: #ifdef BUGGY_LL_MUL
1.1       anton     936: ud = ummul(u1,u2);
                    937: #else
                    938: ud = (UDCell)u1 * (UDCell)u2;
                    939: #endif
                    940: :
1.137     pazsan    941:    0 -rot dup [ 8 cells ] literal -
1.1       anton     942:    DO
1.137     pazsan    943:        dup 0< I' and d2*+ drop
                    944:    LOOP ;
1.1       anton     945: : d2*+ ( ud n -- ud+n c )
                    946:    over MINI
                    947:    and >r >r 2dup d+ swap r> + swap r> ;
                    948: 
1.47      anton     949: um/mod ( ud u1 -- u2 u3 )              core    u_m_slash_mod
1.32      anton     950: ""ud=u3*u1+u2, u1>u2>=0""
1.165     anton     951: #ifdef ASM_UM_SLASH_MOD
1.203     anton     952: ASM_UM_SLASH_MOD(DLO(ud), DHI(ud), u1, u2, u3);
1.165     anton     953: #else /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     954: UDCell r = umdiv(ud,u1);
1.162     pazsan    955: u2=DHI(r);
                    956: u3=DLO(r);
1.165     anton     957: #endif /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     958: :
                    959:    0 swap [ 8 cells 1 + ] literal 0
1.5       jwilke    960:    ?DO /modstep
1.1       anton     961:    LOOP drop swap 1 rshift or swap ;
                    962: : /modstep ( ud c R: u -- ud-?u c R: u )
1.5       jwilke    963:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
1.1       anton     964: : d2*+ ( ud n -- ud+n c )
                    965:    over MINI
                    966:    and >r >r 2dup d+ swap r> + swap r> ;
                    967: 
1.47      anton     968: m+     ( d1 n -- d2 )          double          m_plus
1.158     pazsan    969: #ifdef BUGGY_LL_ADD
                    970: DLO_IS(d2, DLO(d1)+n);
                    971: DHI_IS(d2, DHI(d1) - (n<0) + (DLO(d2)<DLO(d1)));
1.1       anton     972: #else
                    973: d2 = d1+n;
                    974: #endif
                    975: :
                    976:  s>d d+ ;
                    977: 
1.47      anton     978: d+     ( d1 d2 -- d )          double  d_plus
1.158     pazsan    979: #ifdef BUGGY_LL_ADD
                    980: DLO_IS(d, DLO(d1) + DLO(d2));
                    981: DHI_IS(d, DHI(d1) + DHI(d2) + (d.lo<DLO(d1)));
1.1       anton     982: #else
                    983: d = d1+d2;
                    984: #endif
                    985: :
                    986:  rot + >r tuck + swap over u> r> swap - ;
                    987: 
1.47      anton     988: d-     ( d1 d2 -- d )          double          d_minus
1.158     pazsan    989: #ifdef BUGGY_LL_ADD
                    990: DLO_IS(d, DLO(d1) - DLO(d2));
                    991: DHI_IS(d, DHI(d1)-DHI(d2)-(DLO(d1)<DLO(d2)));
1.1       anton     992: #else
                    993: d = d1-d2;
                    994: #endif
                    995: :
                    996:  dnegate d+ ;
                    997: 
1.47      anton     998: dnegate        ( d1 -- d2 )            double  d_negate
1.1       anton     999: /* use dminus as alias */
1.158     pazsan   1000: #ifdef BUGGY_LL_ADD
1.1       anton    1001: d2 = dnegate(d1);
                   1002: #else
                   1003: d2 = -d1;
                   1004: #endif
                   1005: :
                   1006:  invert swap negate tuck 0= - ;
                   1007: 
1.47      anton    1008: d2*    ( d1 -- d2 )            double          d_two_star
1.52      anton    1009: ""Shift left by 1; also works on unsigned numbers""
1.205     anton    1010: d2 = DLSHIFT(d1,1);
1.1       anton    1011: :
                   1012:  2dup d+ ;
                   1013: 
1.47      anton    1014: d2/    ( d1 -- d2 )            double          d_two_slash
1.52      anton    1015: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                   1016: division by 2.""
1.158     pazsan   1017: #ifdef BUGGY_LL_SHIFT
                   1018: DHI_IS(d2, DHI(d1)>>1);
                   1019: DLO_IS(d2, (DLO(d1)>>1) | (DHI(d1)<<(CELL_BITS-1)));
1.1       anton    1020: #else
                   1021: d2 = d1>>1;
                   1022: #endif
                   1023: :
                   1024:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
                   1025:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
                   1026: 
1.47      anton    1027: and    ( w1 w2 -- w )          core
1.1       anton    1028: w = w1&w2;
                   1029: 
1.47      anton    1030: or     ( w1 w2 -- w )          core
1.1       anton    1031: w = w1|w2;
                   1032: :
                   1033:  invert swap invert and invert ;
                   1034: 
1.47      anton    1035: xor    ( w1 w2 -- w )          core    x_or
1.1       anton    1036: w = w1^w2;
                   1037: 
1.47      anton    1038: invert ( w1 -- w2 )            core
1.1       anton    1039: w2 = ~w1;
                   1040: :
                   1041:  MAXU xor ;
                   1042: 
1.47      anton    1043: rshift ( u1 n -- u2 )          core    r_shift
1.53      anton    1044: ""Logical shift right by @i{n} bits.""
1.154     pazsan   1045: #ifdef BROKEN_SHIFT
                   1046:   u2 = rshift(u1, n);
                   1047: #else
                   1048:   u2 = u1 >> n;
                   1049: #endif
1.1       anton    1050: :
                   1051:     0 ?DO 2/ MAXI and LOOP ;
                   1052: 
1.47      anton    1053: lshift ( u1 n -- u2 )          core    l_shift
1.154     pazsan   1054: #ifdef BROKEN_SHIFT
                   1055:   u2 = lshift(u1, n);
                   1056: #else
                   1057:   u2 = u1 << n;
                   1058: #endif
1.1       anton    1059: :
                   1060:     0 ?DO 2* LOOP ;
                   1061: 
1.110     pazsan   1062: \g compare
                   1063: 
1.1       anton    1064: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1065: define(comparisons,
1.47      anton    1066: $1=    ( $2 -- f )             $6      $3equals
1.1       anton    1067: f = FLAG($4==$5);
                   1068: :
                   1069:     [ char $1x char 0 = [IF]
                   1070:        ] IF false ELSE true THEN [
                   1071:     [ELSE]
                   1072:        ] xor 0= [
                   1073:     [THEN] ] ;
                   1074: 
1.47      anton    1075: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton    1076: f = FLAG($4!=$5);
                   1077: :
                   1078:     [ char $1x char 0 = [IF]
                   1079:        ] IF true ELSE false THEN [
                   1080:     [ELSE]
                   1081:        ] xor 0<> [
                   1082:     [THEN] ] ;
                   1083: 
1.47      anton    1084: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton    1085: f = FLAG($4<$5);
                   1086: :
                   1087:     [ char $1x char 0 = [IF]
                   1088:        ] MINI and 0<> [
                   1089:     [ELSE] char $1x char u = [IF]
                   1090:        ]   2dup xor 0<  IF nip ELSE - THEN 0<  [
                   1091:        [ELSE]
                   1092:            ] MINI xor >r MINI xor r> u< [
                   1093:        [THEN]
                   1094:     [THEN] ] ;
                   1095: 
1.47      anton    1096: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton    1097: f = FLAG($4>$5);
                   1098: :
                   1099:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1100:     $1< ;
                   1101: 
1.47      anton    1102: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton    1103: f = FLAG($4<=$5);
                   1104: :
                   1105:     $1> 0= ;
                   1106: 
1.47      anton    1107: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton    1108: f = FLAG($4>=$5);
                   1109: :
                   1110:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1111:     $1<= ;
                   1112: 
                   1113: )
                   1114: 
                   1115: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
                   1116: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
                   1117: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
                   1118: 
                   1119: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1120: define(dcomparisons,
1.47      anton    1121: $1=    ( $2 -- f )             $6      $3equals
1.158     pazsan   1122: #ifdef BUGGY_LL_CMP
1.1       anton    1123: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
                   1124: #else
                   1125: f = FLAG($4==$5);
                   1126: #endif
                   1127: 
1.47      anton    1128: $1<>   ( $2 -- f )             $7      $3not_equals
1.158     pazsan   1129: #ifdef BUGGY_LL_CMP
1.1       anton    1130: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
                   1131: #else
                   1132: f = FLAG($4!=$5);
                   1133: #endif
                   1134: 
1.47      anton    1135: $1<    ( $2 -- f )             $8      $3less_than
1.158     pazsan   1136: #ifdef BUGGY_LL_CMP
1.1       anton    1137: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
                   1138: #else
                   1139: f = FLAG($4<$5);
                   1140: #endif
                   1141: 
1.47      anton    1142: $1>    ( $2 -- f )             $9      $3greater_than
1.158     pazsan   1143: #ifdef BUGGY_LL_CMP
1.1       anton    1144: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
                   1145: #else
                   1146: f = FLAG($4>$5);
                   1147: #endif
                   1148: 
1.47      anton    1149: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.158     pazsan   1150: #ifdef BUGGY_LL_CMP
1.1       anton    1151: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
                   1152: #else
                   1153: f = FLAG($4<=$5);
                   1154: #endif
                   1155: 
1.47      anton    1156: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.158     pazsan   1157: #ifdef BUGGY_LL_CMP
1.1       anton    1158: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
                   1159: #else
                   1160: f = FLAG($4>=$5);
                   1161: #endif
                   1162: 
                   1163: )
                   1164: 
1.15      pazsan   1165: \+dcomps
1.1       anton    1166: 
                   1167: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
                   1168: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
                   1169: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
                   1170: 
1.15      pazsan   1171: \+
1.1       anton    1172: 
1.47      anton    1173: within ( u1 u2 u3 -- f )               core-ext
1.32      anton    1174: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
                   1175: unsigned and signed numbers (but not a mixture).  Another way to think
                   1176: about this word is to consider the numbers as a circle (wrapping
                   1177: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
                   1178: min-n for signed numbers); now consider the range from u2 towards
                   1179: increasing numbers up to and excluding u3 (giving an empty range if
1.52      anton    1180: u2=u3); if u1 is in this range, @code{within} returns true.""
1.1       anton    1181: f = FLAG(u1-u2 < u3-u2);
                   1182: :
                   1183:  over - >r - r> u< ;
                   1184: 
1.112     pazsan   1185: \g stack
                   1186: 
                   1187: useraddr       ( #u -- a_addr )        new
                   1188: a_addr = (Cell *)(up+u);
                   1189: 
                   1190: up!    ( a_addr -- )   gforth  up_store
1.190     pazsan   1191: gforth_UP=up=(Address)a_addr;
1.112     pazsan   1192: :
                   1193:  up ! ;
                   1194: Variable UP
                   1195: 
1.172     anton    1196: sp@    ( S:... -- a_addr )             gforth          sp_fetch
                   1197: a_addr = sp;
1.1       anton    1198: 
1.172     anton    1199: sp!    ( a_addr -- S:... )             gforth          sp_store
1.1       anton    1200: sp = a_addr;
                   1201: 
1.47      anton    1202: rp@    ( -- a_addr )           gforth          rp_fetch
1.1       anton    1203: a_addr = rp;
                   1204: 
1.47      anton    1205: rp!    ( a_addr -- )           gforth          rp_store
1.1       anton    1206: rp = a_addr;
                   1207: 
1.15      pazsan   1208: \+floating
1.1       anton    1209: 
1.172     anton    1210: fp@    ( f:... -- f_addr )     gforth  fp_fetch
1.1       anton    1211: f_addr = fp;
                   1212: 
1.172     anton    1213: fp!    ( f_addr -- f:... )     gforth  fp_store
1.1       anton    1214: fp = f_addr;
                   1215: 
1.15      pazsan   1216: \+
1.1       anton    1217: 
1.65      anton    1218: >r     ( w -- R:w )            core    to_r
1.1       anton    1219: :
                   1220:  (>r) ;
                   1221: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
                   1222: 
1.65      anton    1223: r>     ( R:w -- w )            core    r_from
1.1       anton    1224: :
                   1225:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
                   1226: Create (rdrop) ' ;s A,
                   1227: 
1.65      anton    1228: rdrop  ( R:w -- )              gforth
1.1       anton    1229: :
                   1230:  r> r> drop >r ;
                   1231: 
1.136     pazsan   1232: 2>r    ( d -- R:d )    core-ext        two_to_r
1.1       anton    1233: :
                   1234:  swap r> swap >r swap >r >r ;
                   1235: 
1.136     pazsan   1236: 2r>    ( R:d -- d )    core-ext        two_r_from
1.1       anton    1237: :
                   1238:  r> r> swap r> swap >r swap ;
                   1239: 
1.136     pazsan   1240: 2r@    ( R:d -- R:d d )        core-ext        two_r_fetch
1.1       anton    1241: :
                   1242:  i' j ;
                   1243: 
1.136     pazsan   1244: 2rdrop ( R:d -- )              gforth  two_r_drop
1.1       anton    1245: :
                   1246:  r> r> drop r> drop >r ;
                   1247: 
1.47      anton    1248: over   ( w1 w2 -- w1 w2 w1 )           core
1.1       anton    1249: :
                   1250:  sp@ cell+ @ ;
                   1251: 
1.47      anton    1252: drop   ( w -- )                core
1.1       anton    1253: :
                   1254:  IF THEN ;
                   1255: 
1.47      anton    1256: swap   ( w1 w2 -- w2 w1 )              core
1.1       anton    1257: :
                   1258:  >r (swap) ! r> (swap) @ ;
                   1259: Variable (swap)
                   1260: 
1.47      anton    1261: dup    ( w -- w w )            core    dupe
1.1       anton    1262: :
                   1263:  sp@ @ ;
                   1264: 
1.47      anton    1265: rot    ( w1 w2 w3 -- w2 w3 w1 )        core    rote
1.1       anton    1266: :
                   1267: [ defined? (swap) [IF] ]
                   1268:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
                   1269: Variable (rot)
                   1270: [ELSE] ]
                   1271:     >r swap r> swap ;
                   1272: [THEN]
                   1273: 
1.47      anton    1274: -rot   ( w1 w2 w3 -- w3 w1 w2 )        gforth  not_rote
1.1       anton    1275: :
                   1276:  rot rot ;
                   1277: 
1.47      anton    1278: nip    ( w1 w2 -- w2 )         core-ext
1.1       anton    1279: :
1.6       jwilke   1280:  swap drop ;
1.1       anton    1281: 
1.47      anton    1282: tuck   ( w1 w2 -- w2 w1 w2 )   core-ext
1.1       anton    1283: :
                   1284:  swap over ;
                   1285: 
1.172     anton    1286: ?dup   ( w -- S:... w )        core    question_dupe
1.52      anton    1287: ""Actually the stack effect is: @code{( w -- 0 | w w )}.  It performs a
                   1288: @code{dup} if w is nonzero.""
1.1       anton    1289: if (w!=0) {
                   1290:   *--sp = w;
                   1291: }
                   1292: :
                   1293:  dup IF dup THEN ;
                   1294: 
1.172     anton    1295: pick   ( S:... u -- S:... w )          core-ext
1.52      anton    1296: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1.172     anton    1297: w = sp[u];
1.1       anton    1298: :
                   1299:  1+ cells sp@ + @ ;
                   1300: 
1.47      anton    1301: 2drop  ( w1 w2 -- )            core    two_drop
1.1       anton    1302: :
                   1303:  drop drop ;
                   1304: 
1.47      anton    1305: 2dup   ( w1 w2 -- w1 w2 w1 w2 )        core    two_dupe
1.1       anton    1306: :
                   1307:  over over ;
                   1308: 
1.47      anton    1309: 2over  ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )    core    two_over
1.1       anton    1310: :
                   1311:  3 pick 3 pick ;
                   1312: 
1.47      anton    1313: 2swap  ( w1 w2 w3 w4 -- w3 w4 w1 w2 )  core    two_swap
1.1       anton    1314: :
                   1315:  rot >r rot r> ;
                   1316: 
1.47      anton    1317: 2rot   ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )      double-ext      two_rote
1.1       anton    1318: :
                   1319:  >r >r 2swap r> r> 2swap ;
                   1320: 
1.47      anton    1321: 2nip   ( w1 w2 w3 w4 -- w3 w4 )        gforth  two_nip
1.1       anton    1322: :
                   1323:  2swap 2drop ;
                   1324: 
1.47      anton    1325: 2tuck  ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )    gforth  two_tuck
1.1       anton    1326: :
                   1327:  2swap 2over ;
                   1328: 
                   1329: \ toggle is high-level: 0.11/0.42%
                   1330: 
1.110     pazsan   1331: \g memory
                   1332: 
1.47      anton    1333: @      ( a_addr -- w )         core    fetch
1.52      anton    1334: ""@i{w} is the cell stored at @i{a_addr}.""
1.1       anton    1335: w = *a_addr;
                   1336: 
1.112     pazsan   1337: \ lit@ / lit_fetch = lit @
                   1338: 
                   1339: lit@           ( #a_addr -- w ) new    lit_fetch
                   1340: w = *a_addr;
                   1341: 
1.47      anton    1342: !      ( w a_addr -- )         core    store
1.52      anton    1343: ""Store @i{w} into the cell at @i{a-addr}.""
1.1       anton    1344: *a_addr = w;
                   1345: 
1.47      anton    1346: +!     ( n a_addr -- )         core    plus_store
1.52      anton    1347: ""Add @i{n} to the cell at @i{a-addr}.""
1.1       anton    1348: *a_addr += n;
                   1349: :
                   1350:  tuck @ + swap ! ;
                   1351: 
1.47      anton    1352: c@     ( c_addr -- c )         core    c_fetch
1.52      anton    1353: ""@i{c} is the char stored at @i{c_addr}.""
1.1       anton    1354: c = *c_addr;
                   1355: :
                   1356: [ bigendian [IF] ]
                   1357:     [ cell>bit 4 = [IF] ]
                   1358:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1359:        IF  $FF and  ELSE  8>>  THEN  ;
                   1360:     [ [ELSE] ]
                   1361:        dup [ cell 1- ] literal and
                   1362:        tuck - @ swap [ cell 1- ] literal xor
                   1363:        0 ?DO 8>> LOOP $FF and
                   1364:     [ [THEN] ]
                   1365: [ [ELSE] ]
                   1366:     [ cell>bit 4 = [IF] ]
                   1367:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1368:        IF  8>>  ELSE  $FF and  THEN
                   1369:     [ [ELSE] ]
                   1370:        dup [ cell  1- ] literal and 
                   1371:        tuck - @ swap
                   1372:        0 ?DO 8>> LOOP 255 and
                   1373:     [ [THEN] ]
                   1374: [ [THEN] ]
                   1375: ;
                   1376: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
                   1377: 
1.47      anton    1378: c!     ( c c_addr -- )         core    c_store
1.52      anton    1379: ""Store @i{c} into the char at @i{c-addr}.""
1.1       anton    1380: *c_addr = c;
                   1381: :
                   1382: [ bigendian [IF] ]
                   1383:     [ cell>bit 4 = [IF] ]
                   1384:        tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
                   1385:        dup -2 and @ over 1 and cells masks + @ and
                   1386:        r> or swap -2 and ! ;
                   1387:        Create masks $00FF , $FF00 ,
                   1388:     [ELSE] ]
                   1389:        dup [ cell 1- ] literal and dup 
                   1390:        [ cell 1- ] literal xor >r
                   1391:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1392:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1393:     [THEN]
                   1394: [ELSE] ]
                   1395:     [ cell>bit 4 = [IF] ]
                   1396:        tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
                   1397:        dup -2 and @ over 1 and cells masks + @ and
                   1398:        r> or swap -2 and ! ;
                   1399:        Create masks $FF00 , $00FF ,
                   1400:     [ELSE] ]
                   1401:        dup [ cell 1- ] literal and dup >r
                   1402:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1403:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1404:     [THEN]
                   1405: [THEN]
                   1406: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
                   1407: 
1.47      anton    1408: 2!     ( w1 w2 a_addr -- )             core    two_store
1.52      anton    1409: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1.1       anton    1410: a_addr[0] = w2;
                   1411: a_addr[1] = w1;
                   1412: :
                   1413:  tuck ! cell+ ! ;
                   1414: 
1.47      anton    1415: 2@     ( a_addr -- w1 w2 )             core    two_fetch
1.52      anton    1416: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
                   1417: the content of the next cell.""
1.1       anton    1418: w2 = a_addr[0];
                   1419: w1 = a_addr[1];
                   1420: :
                   1421:  dup cell+ @ swap @ ;
                   1422: 
1.47      anton    1423: cell+  ( a_addr1 -- a_addr2 )  core    cell_plus
1.52      anton    1424: ""@code{1 cells +}""
1.1       anton    1425: a_addr2 = a_addr1+1;
                   1426: :
                   1427:  cell + ;
                   1428: 
1.47      anton    1429: cells  ( n1 -- n2 )            core
1.52      anton    1430: "" @i{n2} is the number of address units of @i{n1} cells.""
1.1       anton    1431: n2 = n1 * sizeof(Cell);
                   1432: :
                   1433:  [ cell
                   1434:  2/ dup [IF] ] 2* [ [THEN]
                   1435:  2/ dup [IF] ] 2* [ [THEN]
                   1436:  2/ dup [IF] ] 2* [ [THEN]
                   1437:  2/ dup [IF] ] 2* [ [THEN]
                   1438:  drop ] ;
                   1439: 
1.47      anton    1440: char+  ( c_addr1 -- c_addr2 )  core    char_plus
1.52      anton    1441: ""@code{1 chars +}.""
1.1       anton    1442: c_addr2 = c_addr1 + 1;
                   1443: :
                   1444:  1+ ;
                   1445: 
1.47      anton    1446: (chars)        ( n1 -- n2 )    gforth  paren_chars
1.1       anton    1447: n2 = n1 * sizeof(Char);
                   1448: :
                   1449:  ;
                   1450: 
1.47      anton    1451: count  ( c_addr1 -- c_addr2 u )        core
1.56      anton    1452: ""@i{c-addr2} is the first character and @i{u} the length of the
                   1453: counted string at @i{c-addr1}.""
1.1       anton    1454: u = *c_addr1;
                   1455: c_addr2 = c_addr1+1;
                   1456: :
                   1457:  dup 1+ swap c@ ;
                   1458: 
1.110     pazsan   1459: \g compiler
                   1460: 
1.138     pazsan   1461: \+f83headerstring
                   1462: 
                   1463: (f83find)      ( c_addr u f83name1 -- f83name2 )       new     paren_f83find
                   1464: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
                   1465:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1466:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1467:     break;
                   1468: f83name2=f83name1;
1.210     pazsan   1469: #ifdef DEBUG
                   1470: fprintf(stderr, "F83find ");
                   1471: fwrite(c_addr, u, 1, stderr);
                   1472: fprintf(stderr, " found %08x\n", f83name2); 
                   1473: #endif
1.138     pazsan   1474: :
                   1475:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
                   1476:        >r 2dup r@ cell+ char+ capscomp  0=
                   1477:        IF  2drop r>  EXIT  THEN
                   1478:        r> @
                   1479:     REPEAT  THEN  nip nip ;
                   1480: : (find-samelen) ( u f83name1 -- u f83name2/0 )
                   1481:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL  THEN ;
                   1482: : capscomp ( c_addr1 u c_addr2 -- n )
                   1483:  swap bounds
                   1484:  ?DO  dup c@ I c@ <>
                   1485:      IF  dup c@ toupper I c@ toupper =
                   1486:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1487:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1488: : sgn ( n -- -1/0/1 )
                   1489:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                   1490: 
                   1491: \-
                   1492: 
1.112     pazsan   1493: (listlfind)    ( c_addr u longname1 -- longname2 )     new     paren_listlfind
1.125     anton    1494: longname2=listlfind(c_addr, u, longname1);
1.1       anton    1495: :
1.112     pazsan   1496:     BEGIN  dup WHILE  (findl-samelen)  dup  WHILE
                   1497:        >r 2dup r@ cell+ cell+ capscomp  0=
1.1       anton    1498:        IF  2drop r>  EXIT  THEN
                   1499:        r> @
                   1500:     REPEAT  THEN  nip nip ;
1.112     pazsan   1501: : (findl-samelen) ( u longname1 -- u longname2/0 )
                   1502:     BEGIN  2dup cell+ @ lcount-mask and <> WHILE  @  dup 0= UNTIL  THEN ;
1.144     pazsan   1503: : capscomp ( c_addr1 u c_addr2 -- n )
                   1504:  swap bounds
                   1505:  ?DO  dup c@ I c@ <>
                   1506:      IF  dup c@ toupper I c@ toupper =
                   1507:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1508:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1509: : sgn ( n -- -1/0/1 )
                   1510:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1511: 
1.15      pazsan   1512: \+hash
1.1       anton    1513: 
1.112     pazsan   1514: (hashlfind)    ( c_addr u a_addr -- longname2 )        new     paren_hashlfind
1.125     anton    1515: longname2 = hashlfind(c_addr, u, a_addr);
1.1       anton    1516: :
                   1517:  BEGIN  dup  WHILE
1.112     pazsan   1518:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1519:         IF  2dup r@ cell+ cell+ capscomp 0=
1.1       anton    1520:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1521:        rdrop r>
                   1522:  REPEAT nip nip ;
                   1523: 
1.112     pazsan   1524: (tablelfind)   ( c_addr u a_addr -- longname2 )        new     paren_tablelfind
1.1       anton    1525: ""A case-sensitive variant of @code{(hashfind)}""
1.125     anton    1526: longname2 = tablelfind(c_addr, u, a_addr);
1.1       anton    1527: :
                   1528:  BEGIN  dup  WHILE
1.112     pazsan   1529:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1530:         IF  2dup r@ cell+ cell+ -text 0=
1.1       anton    1531:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1532:        rdrop r>
                   1533:  REPEAT nip nip ;
1.138     pazsan   1534: : -text ( c_addr1 u c_addr2 -- n )
                   1535:  swap bounds
                   1536:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                   1537:  ELSE  c@ I c@ - unloop  THEN  sgn ;
                   1538: : sgn ( n -- -1/0/1 )
                   1539:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1540: 
1.47      anton    1541: (hashkey1)     ( c_addr u ubits -- ukey )              gforth  paren_hashkey1
1.1       anton    1542: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
1.125     anton    1543: ukey = hashkey1(c_addr, u, ubits);
1.1       anton    1544: :
                   1545:  dup rot-values + c@ over 1 swap lshift 1- >r
                   1546:  tuck - 2swap r> 0 2swap bounds
                   1547:  ?DO  dup 4 pick lshift swap 3 pick rshift or
                   1548:       I c@ toupper xor
                   1549:       over and  LOOP
                   1550:  nip nip nip ;
                   1551: Create rot-values
                   1552:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
                   1553:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
                   1554:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
                   1555:   7 c, 5 c, 5 c,
1.138     pazsan   1556: 
                   1557: \+
1.1       anton    1558: 
1.15      pazsan   1559: \+
1.1       anton    1560: 
1.47      anton    1561: (parse-white)  ( c_addr1 u1 -- c_addr2 u2 )    gforth  paren_parse_white
1.125     anton    1562: struct Cellpair r=parse_white(c_addr1, u1);
                   1563: c_addr2 = (Char *)(r.n1);
                   1564: u2 = r.n2;
1.1       anton    1565: :
                   1566:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
                   1567:  REPEAT  THEN  2dup
                   1568:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
                   1569:  REPEAT  THEN  nip - ;
                   1570: 
1.47      anton    1571: aligned        ( c_addr -- a_addr )    core
1.29      crook    1572: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1573: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
                   1574: :
                   1575:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                   1576: 
1.47      anton    1577: faligned       ( c_addr -- f_addr )    float   f_aligned
1.29      crook    1578: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1579: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
                   1580: :
                   1581:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
                   1582: 
1.35      jwilke   1583: \ threading stuff is currently only interesting if we have a compiler
                   1584: \fhas? standardthreading has? compiler and [IF]
1.47      anton    1585: threading-method       ( -- n )        gforth  threading_method
1.1       anton    1586: ""0 if the engine is direct threaded. Note that this may change during
                   1587: the lifetime of an image.""
                   1588: #if defined(DOUBLY_INDIRECT)
                   1589: n=2;
                   1590: #else
                   1591: # if defined(DIRECT_THREADED)
                   1592: n=0;
                   1593: # else
                   1594: n=1;
                   1595: # endif
                   1596: #endif
                   1597: :
                   1598:  1 ;
1.28      jwilke   1599: 
1.35      jwilke   1600: \f[THEN]
1.1       anton    1601: 
1.83      pazsan   1602: \g hostos
                   1603: 
1.192     anton    1604: key-file       ( wfileid -- c )                gforth  paren_key_file
1.193     anton    1605: ""Read one character @i{c} from @i{wfileid}.  This word disables
                   1606: buffering for @i{wfileid}.  If you want to read characters from a
                   1607: terminal in non-canonical (raw) mode, you have to put the terminal in
                   1608: non-canonical mode yourself (using the C interface); the exception is
                   1609: @code{stdin}: Gforth automatically puts it into non-canonical mode.""
1.17      pazsan   1610: #ifdef HAS_FILE
1.1       anton    1611: fflush(stdout);
1.192     anton    1612: c = key((FILE*)wfileid);
1.17      pazsan   1613: #else
1.192     anton    1614: c = key(stdin);
1.17      pazsan   1615: #endif
1.1       anton    1616: 
1.192     anton    1617: key?-file      ( wfileid -- f )                gforth  key_q_file
                   1618: ""@i{f} is true if at least one character can be read from @i{wfileid}
1.193     anton    1619: without blocking.  If you also want to use @code{read-file} or
                   1620: @code{read-line} on the file, you have to call @code{key?-file} or
                   1621: @code{key-file} first (these two words disable buffering).""
1.17      pazsan   1622: #ifdef HAS_FILE
1.1       anton    1623: fflush(stdout);
1.192     anton    1624: f = key_query((FILE*)wfileid);
1.17      pazsan   1625: #else
1.192     anton    1626: f = key_query(stdin);
1.17      pazsan   1627: #endif
                   1628: 
1.47      anton    1629: stdin  ( -- wfileid )  gforth
1.193     anton    1630: ""The standard input file of the Gforth process.""
1.12      pazsan   1631: wfileid = (Cell)stdin;
1.1       anton    1632: 
1.47      anton    1633: stdout ( -- wfileid )  gforth
1.193     anton    1634: ""The standard output file of the Gforth process.""
1.1       anton    1635: wfileid = (Cell)stdout;
                   1636: 
1.47      anton    1637: stderr ( -- wfileid )  gforth
1.193     anton    1638: ""The standard error output file of the Gforth process.""
1.1       anton    1639: wfileid = (Cell)stderr;
                   1640: 
1.208     pazsan   1641: \+os
                   1642: 
1.47      anton    1643: form   ( -- urows ucols )      gforth
1.209     anton    1644: ""The number of lines and columns in the terminal. These numbers may
                   1645: change with the window size.  Note that it depends on the OS whether
                   1646: this reflects the actual size and changes with the window size
                   1647: (currently only on Unix-like OSs).  On other OSs you just get a
                   1648: default, and can tell Gforth the terminal size by setting the
                   1649: environment variables @code{COLUMNS} and @code{LINES} before starting
                   1650: Gforth.""
1.1       anton    1651: /* we could block SIGWINCH here to get a consistent size, but I don't
                   1652:  think this is necessary or always beneficial */
                   1653: urows=rows;
                   1654: ucols=cols;
                   1655: 
1.189     pazsan   1656: wcwidth        ( u -- n )      gforth
                   1657: ""The number of fixed-width characters per unicode character u""
                   1658: n = wcwidth(u);
                   1659: 
1.47      anton    1660: flush-icache   ( c_addr u -- ) gforth  flush_icache
1.1       anton    1661: ""Make sure that the instruction cache of the processor (if there is
1.29      crook    1662: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1.1       anton    1663: afterwards. @code{END-CODE} performs a @code{flush-icache}
                   1664: automatically. Caveat: @code{flush-icache} might not work on your
                   1665: installation; this is usually the case if direct threading is not
                   1666: supported on your machine (take a look at your @file{machine.h}) and
                   1667: your machine has a separate instruction cache. In such cases,
                   1668: @code{flush-icache} does nothing instead of flushing the instruction
                   1669: cache.""
                   1670: FLUSH_ICACHE(c_addr,u);
                   1671: 
1.47      anton    1672: (bye)  ( n -- )        gforth  paren_bye
1.77      anton    1673: SUPER_END;
1.1       anton    1674: return (Label *)n;
                   1675: 
1.125     anton    1676: (system)       ( c_addr u -- wretval wior )    gforth  paren_system
1.155     anton    1677: wretval = gforth_system(c_addr, u);  
1.1       anton    1678: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
                   1679: 
1.47      anton    1680: getenv ( c_addr1 u1 -- c_addr2 u2 )    gforth
1.29      crook    1681: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1.24      crook    1682: is the host operating system's expansion of that environment variable. If the
1.29      crook    1683: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1.24      crook    1684: in length.""
1.46      pazsan   1685: /* close ' to keep fontify happy */
1.190     pazsan   1686: c_addr2 = (Char *)getenv(cstr(c_addr1,u1,1));
                   1687: u2 = (c_addr2 == NULL ? 0 : strlen((char *)c_addr2));
1.1       anton    1688: 
1.56      anton    1689: open-pipe      ( c_addr u wfam -- wfileid wior )       gforth  open_pipe
1.84      pazsan   1690: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1.1       anton    1691: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
                   1692: 
1.47      anton    1693: close-pipe     ( wfileid -- wretval wior )             gforth  close_pipe
1.1       anton    1694: wretval = pclose((FILE *)wfileid);
                   1695: wior = IOR(wretval==-1);
                   1696: 
1.47      anton    1697: time&date      ( -- nsec nmin nhour nday nmonth nyear )        facility-ext    time_and_date
1.44      crook    1698: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
                   1699: Months are numbered from 1.""
1.127     anton    1700: #if 1
                   1701: time_t now;
                   1702: struct tm *ltime;
                   1703: time(&now);
                   1704: ltime=localtime(&now);
                   1705: #else
1.1       anton    1706: struct timeval time1;
                   1707: struct timezone zone1;
                   1708: struct tm *ltime;
                   1709: gettimeofday(&time1,&zone1);
1.51      anton    1710: /* !! Single Unix specification: 
                   1711:    If tzp is not a null pointer, the behaviour is unspecified. */
1.1       anton    1712: ltime=localtime((time_t *)&time1.tv_sec);
1.127     anton    1713: #endif
1.1       anton    1714: nyear =ltime->tm_year+1900;
                   1715: nmonth=ltime->tm_mon+1;
                   1716: nday  =ltime->tm_mday;
                   1717: nhour =ltime->tm_hour;
                   1718: nmin  =ltime->tm_min;
                   1719: nsec  =ltime->tm_sec;
                   1720: 
1.212     anton    1721: ms     ( u -- )        facility-ext
1.44      crook    1722: ""Wait at least @i{n} milli-second.""
1.212     anton    1723: gforth_ms(u);
1.1       anton    1724: 
1.47      anton    1725: allocate       ( u -- a_addr wior )    memory
1.29      crook    1726: ""Allocate @i{u} address units of contiguous data space. The initial
1.27      crook    1727: contents of the data space is undefined. If the allocation is successful,
1.29      crook    1728: @i{a-addr} is the start address of the allocated region and @i{wior}
                   1729: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1.52      anton    1730: is a non-zero I/O result code.""
1.1       anton    1731: a_addr = (Cell *)malloc(u?u:1);
                   1732: wior = IOR(a_addr==NULL);
                   1733: 
1.47      anton    1734: free   ( a_addr -- wior )              memory
1.29      crook    1735: ""Return the region of data space starting at @i{a-addr} to the system.
1.52      anton    1736: The region must originally have been obtained using @code{allocate} or
1.29      crook    1737: @code{resize}. If the operational is successful, @i{wior} is 0.
1.52      anton    1738: If the operation fails, @i{wior} is a non-zero I/O result code.""
1.1       anton    1739: free(a_addr);
                   1740: wior = 0;
                   1741: 
1.47      anton    1742: resize ( a_addr1 u -- a_addr2 wior )   memory
1.26      crook    1743: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1.1       anton    1744: address units, possibly moving the contents to a different
1.27      crook    1745: area. @i{a-addr2} is the address of the resulting area.
1.52      anton    1746: If the operation is successful, @i{wior} is 0.
                   1747: If the operation fails, @i{wior} is a non-zero
1.29      crook    1748: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1.27      crook    1749: @code{resize} @code{allocate}s @i{u} address units.""
1.1       anton    1750: /* the following check is not necessary on most OSs, but it is needed
                   1751:    on SunOS 4.1.2. */
1.46      pazsan   1752: /* close ' to keep fontify happy */
1.1       anton    1753: if (a_addr1==NULL)
                   1754:   a_addr2 = (Cell *)malloc(u);
                   1755: else
                   1756:   a_addr2 = (Cell *)realloc(a_addr1, u);
                   1757: wior = IOR(a_addr2==NULL);     /* !! Define a return code */
                   1758: 
1.47      anton    1759: strerror       ( n -- c_addr u )       gforth
1.190     pazsan   1760: c_addr = (Char *)strerror(n);
                   1761: u = strlen((char *)c_addr);
1.1       anton    1762: 
1.47      anton    1763: strsignal      ( n -- c_addr u )       gforth
1.190     pazsan   1764: c_addr = (Char *)strsignal(n);
                   1765: u = strlen((char *)c_addr);
1.1       anton    1766: 
1.172     anton    1767: call-c ( ... w -- ... )        gforth  call_c
1.1       anton    1768: ""Call the C function pointed to by @i{w}. The C function has to
                   1769: access the stack itself. The stack pointers are exported in the global
1.213     anton    1770: variables @code{gforth_SP} and @code{gforth_FP}.""
1.1       anton    1771: /* This is a first attempt at support for calls to C. This may change in
                   1772:    the future */
1.185     pazsan   1773: gforth_FP=fp;
                   1774: gforth_SP=sp;
1.1       anton    1775: ((void (*)())w)();
1.185     pazsan   1776: sp=gforth_SP;
                   1777: fp=gforth_FP;
1.1       anton    1778: 
1.15      pazsan   1779: \+
                   1780: \+file
1.1       anton    1781: 
1.47      anton    1782: close-file     ( wfileid -- wior )             file    close_file
1.1       anton    1783: wior = IOR(fclose((FILE *)wfileid)==EOF);
                   1784: 
1.56      anton    1785: open-file      ( c_addr u wfam -- wfileid wior )       file    open_file
1.217   ! anton    1786: wfileid = opencreate_file(tilde_cstr(c_addr,u,1), wfam, 0, &wior);
1.1       anton    1787: 
1.56      anton    1788: create-file    ( c_addr u wfam -- wfileid wior )       file    create_file
1.217   ! anton    1789: wfileid = opencreate_file(tilde_cstr(c_addr,u,1), wfam, O_CREAT|O_TRUNC, &wior);
1.1       anton    1790: 
1.47      anton    1791: delete-file    ( c_addr u -- wior )            file    delete_file
1.1       anton    1792: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
                   1793: 
1.47      anton    1794: rename-file    ( c_addr1 u1 c_addr2 u2 -- wior )       file-ext        rename_file
1.29      crook    1795: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1.125     anton    1796: wior = rename_file(c_addr1, u1, c_addr2, u2);
1.1       anton    1797: 
1.47      anton    1798: file-position  ( wfileid -- ud wior )  file    file_position
1.1       anton    1799: /* !! use tell and lseek? */
1.108     anton    1800: ud = OFF2UD(ftello((FILE *)wfileid));
                   1801: wior = IOR(UD2OFF(ud)==-1);
1.1       anton    1802: 
1.47      anton    1803: reposition-file        ( ud wfileid -- wior )  file    reposition_file
1.108     anton    1804: wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1.1       anton    1805: 
1.47      anton    1806: file-size      ( wfileid -- ud wior )  file    file_size
1.1       anton    1807: struct stat buf;
                   1808: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1.108     anton    1809: ud = OFF2UD(buf.st_size);
1.1       anton    1810: 
1.47      anton    1811: resize-file    ( ud wfileid -- wior )  file    resize_file
1.108     anton    1812: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1.1       anton    1813: 
1.47      anton    1814: read-file      ( c_addr u1 wfileid -- u2 wior )        file    read_file
1.1       anton    1815: /* !! fread does not guarantee enough */
                   1816: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1817: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1818: /* !! is the value of ferror errno-compatible? */
                   1819: if (wior)
                   1820:   clearerr((FILE *)wfileid);
                   1821: 
1.125     anton    1822: (read-line)    ( c_addr u1 wfileid -- u2 flag u3 wior ) file   paren_read_line
                   1823: struct Cellquad r = read_line(c_addr, u1, wfileid);
                   1824: u2   = r.n1;
                   1825: flag = r.n2;
                   1826: u3   = r.n3;
                   1827: wior = r.n4;
1.1       anton    1828: 
1.15      pazsan   1829: \+
1.1       anton    1830: 
1.47      anton    1831: write-file     ( c_addr u1 wfileid -- wior )   file    write_file
1.1       anton    1832: /* !! fwrite does not guarantee enough */
1.39      pazsan   1833: #ifdef HAS_FILE
1.1       anton    1834: {
                   1835:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1836:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1837:   if (wior)
                   1838:     clearerr((FILE *)wfileid);
                   1839: }
1.39      pazsan   1840: #else
                   1841: TYPE(c_addr, u1);
                   1842: #endif
1.17      pazsan   1843: 
1.47      anton    1844: emit-file      ( c wfileid -- wior )   gforth  emit_file
1.17      pazsan   1845: #ifdef HAS_FILE
1.1       anton    1846: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
                   1847: if (wior)
                   1848:   clearerr((FILE *)wfileid);
1.17      pazsan   1849: #else
1.36      pazsan   1850: PUTC(c);
1.17      pazsan   1851: #endif
1.1       anton    1852: 
1.15      pazsan   1853: \+file
1.1       anton    1854: 
1.47      anton    1855: flush-file     ( wfileid -- wior )             file-ext        flush_file
1.1       anton    1856: wior = IOR(fflush((FILE *) wfileid)==EOF);
                   1857: 
1.56      anton    1858: file-status    ( c_addr u -- wfam wior )       file-ext        file_status
1.125     anton    1859: struct Cellpair r = file_status(c_addr, u);
                   1860: wfam = r.n1;
                   1861: wior = r.n2;
1.1       anton    1862: 
1.112     pazsan   1863: file-eof?      ( wfileid -- flag )     gforth  file_eof_query
                   1864: flag = FLAG(feof((FILE *) wfileid));
1.1       anton    1865: 
1.112     pazsan   1866: open-dir       ( c_addr u -- wdirid wior )     gforth  open_dir
                   1867: ""Open the directory specified by @i{c-addr, u}
                   1868: and return @i{dir-id} for futher access to it.""
                   1869: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
                   1870: wior =  IOR(wdirid == 0);
                   1871: 
                   1872: read-dir       ( c_addr u1 wdirid -- u2 flag wior )    gforth  read_dir
                   1873: ""Attempt to read the next entry from the directory specified
                   1874: by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}. 
                   1875: If the attempt fails because there is no more entries,
                   1876: @i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
                   1877: If the attempt to read the next entry fails because of any other reason, 
                   1878: return @i{ior}<>0.
                   1879: If the attempt succeeds, store file name to the buffer at @i{c-addr}
                   1880: and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
                   1881: If the length of the file name is greater than @i{u1}, 
                   1882: store first @i{u1} characters from file name into the buffer and
                   1883: indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
                   1884: struct dirent * dent;
                   1885: dent = readdir((DIR *)wdirid);
                   1886: wior = 0;
                   1887: flag = -1;
                   1888: if(dent == NULL) {
                   1889:   u2 = 0;
                   1890:   flag = 0;
                   1891: } else {
1.190     pazsan   1892:   u2 = strlen((char *)dent->d_name);
1.112     pazsan   1893:   if(u2 > u1) {
                   1894:     u2 = u1;
                   1895:     wior = -512-ENAMETOOLONG;
                   1896:   }
                   1897:   memmove(c_addr, dent->d_name, u2);
                   1898: }
                   1899: 
                   1900: close-dir      ( wdirid -- wior )      gforth  close_dir
                   1901: ""Close the directory specified by @i{dir-id}.""
                   1902: wior = IOR(closedir((DIR *)wdirid));
                   1903: 
                   1904: filename-match ( c_addr1 u1 c_addr2 u2 -- flag )       gforth  match_file
                   1905: char * string = cstr(c_addr1, u1, 1);
                   1906: char * pattern = cstr(c_addr2, u2, 0);
                   1907: flag = FLAG(!fnmatch(pattern, string, 0));
                   1908: 
1.157     pazsan   1909: set-dir        ( c_addr u -- wior )    gforth set_dir
                   1910: ""Change the current directory to @i{c-addr, u}.
                   1911: Return an error if this is not possible""
                   1912: wior = IOR(chdir(tilde_cstr(c_addr, u, 1)));
                   1913: 
                   1914: get-dir        ( c_addr1 u1 -- c_addr2 u2 )    gforth get_dir
                   1915: ""Store the current directory in the buffer specified by @{c-addr1, u1}.
                   1916: If the buffer size is not sufficient, return 0 0""
1.190     pazsan   1917: c_addr2 = (Char *)getcwd((char *)c_addr1, u1);
1.157     pazsan   1918: if(c_addr2 != NULL) {
1.190     pazsan   1919:   u2 = strlen((char *)c_addr2);
1.157     pazsan   1920: } else {
                   1921:   u2 = 0;
                   1922: }
                   1923: 
1.112     pazsan   1924: \+
                   1925: 
                   1926: newline        ( -- c_addr u ) gforth
                   1927: ""String containing the newline sequence of the host OS""
                   1928: char newline[] = {
1.115     anton    1929: #if DIRSEP=='/'
                   1930: /* Unix */
1.112     pazsan   1931: '\n'
                   1932: #else
1.115     anton    1933: /* DOS, Win, OS/2 */
1.112     pazsan   1934: '\r','\n'
                   1935: #endif
                   1936: };
1.190     pazsan   1937: c_addr=(Char *)newline;
1.112     pazsan   1938: u=sizeof(newline);
                   1939: :
                   1940:  "newline count ;
                   1941: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
                   1942: 
                   1943: \+os
                   1944: 
                   1945: utime  ( -- dtime )    gforth
                   1946: ""Report the current time in microseconds since some epoch.""
                   1947: struct timeval time1;
                   1948: gettimeofday(&time1,NULL);
                   1949: dtime = timeval2us(&time1);
                   1950: 
                   1951: cputime ( -- duser dsystem ) gforth
                   1952: ""duser and dsystem are the respective user- and system-level CPU
                   1953: times used since the start of the Forth system (excluding child
                   1954: processes), in microseconds (the granularity may be much larger,
                   1955: however).  On platforms without the getrusage call, it reports elapsed
                   1956: time (since some epoch) for duser and 0 for dsystem.""
                   1957: #ifdef HAVE_GETRUSAGE
                   1958: struct rusage usage;
                   1959: getrusage(RUSAGE_SELF, &usage);
                   1960: duser = timeval2us(&usage.ru_utime);
                   1961: dsystem = timeval2us(&usage.ru_stime);
                   1962: #else
                   1963: struct timeval time1;
                   1964: gettimeofday(&time1,NULL);
                   1965: duser = timeval2us(&time1);
1.158     pazsan   1966: dsystem = DZERO;
1.112     pazsan   1967: #endif
                   1968: 
                   1969: \+
                   1970: 
                   1971: \+floating
                   1972: 
                   1973: \g floating
1.83      pazsan   1974: 
1.1       anton    1975: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
                   1976: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
                   1977: 
1.177     pazsan   1978: s>f    ( n -- r )              float   s_to_f
                   1979: r = n;
                   1980: 
1.47      anton    1981: d>f    ( d -- r )              float   d_to_f
1.158     pazsan   1982: #ifdef BUGGY_LL_D2F
1.1       anton    1983: extern double ldexp(double x, int exp);
1.158     pazsan   1984: if (DHI(d)<0) {
                   1985: #ifdef BUGGY_LL_ADD
1.113     anton    1986:   DCell d2=dnegate(d);
1.158     pazsan   1987: #else
                   1988:   DCell d2=-d;
                   1989: #endif
                   1990:   r = -(ldexp((Float)DHI(d2),CELL_BITS) + (Float)DLO(d2));
1.113     anton    1991: } else
1.158     pazsan   1992:   r = ldexp((Float)DHI(d),CELL_BITS) + (Float)DLO(d);
1.1       anton    1993: #else
                   1994: r = d;
                   1995: #endif
                   1996: 
1.47      anton    1997: f>d    ( r -- d )              float   f_to_d
1.100     pazsan   1998: extern DCell double2ll(Float r);
                   1999: d = double2ll(r);
1.1       anton    2000: 
1.177     pazsan   2001: f>s    ( r -- n )              float   f_to_s
                   2002: n = (Cell)r;
                   2003: 
1.47      anton    2004: f!     ( r f_addr -- ) float   f_store
1.52      anton    2005: ""Store @i{r} into the float at address @i{f-addr}.""
1.1       anton    2006: *f_addr = r;
                   2007: 
1.47      anton    2008: f@     ( f_addr -- r ) float   f_fetch
1.52      anton    2009: ""@i{r} is the float at address @i{f-addr}.""
1.1       anton    2010: r = *f_addr;
                   2011: 
1.47      anton    2012: df@    ( df_addr -- r )        float-ext       d_f_fetch
1.52      anton    2013: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1.1       anton    2014: #ifdef IEEE_FP
                   2015: r = *df_addr;
                   2016: #else
                   2017: !! df@
                   2018: #endif
                   2019: 
1.47      anton    2020: df!    ( r df_addr -- )        float-ext       d_f_store
1.52      anton    2021: ""Store @i{r} as double-precision IEEE floating-point value to the
                   2022: address @i{df-addr}.""
1.1       anton    2023: #ifdef IEEE_FP
                   2024: *df_addr = r;
                   2025: #else
                   2026: !! df!
                   2027: #endif
                   2028: 
1.47      anton    2029: sf@    ( sf_addr -- r )        float-ext       s_f_fetch
1.52      anton    2030: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1.1       anton    2031: #ifdef IEEE_FP
                   2032: r = *sf_addr;
                   2033: #else
                   2034: !! sf@
                   2035: #endif
                   2036: 
1.47      anton    2037: sf!    ( r sf_addr -- )        float-ext       s_f_store
1.52      anton    2038: ""Store @i{r} as single-precision IEEE floating-point value to the
                   2039: address @i{sf-addr}.""
1.1       anton    2040: #ifdef IEEE_FP
                   2041: *sf_addr = r;
                   2042: #else
                   2043: !! sf!
                   2044: #endif
                   2045: 
1.47      anton    2046: f+     ( r1 r2 -- r3 ) float   f_plus
1.1       anton    2047: r3 = r1+r2;
                   2048: 
1.47      anton    2049: f-     ( r1 r2 -- r3 ) float   f_minus
1.1       anton    2050: r3 = r1-r2;
                   2051: 
1.47      anton    2052: f*     ( r1 r2 -- r3 ) float   f_star
1.1       anton    2053: r3 = r1*r2;
                   2054: 
1.47      anton    2055: f/     ( r1 r2 -- r3 ) float   f_slash
1.1       anton    2056: r3 = r1/r2;
                   2057: 
1.47      anton    2058: f**    ( r1 r2 -- r3 ) float-ext       f_star_star
1.26      crook    2059: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1.1       anton    2060: r3 = pow(r1,r2);
1.177     pazsan   2061: 
                   2062: fm*    ( r1 n -- r2 )  gforth  fm_star
                   2063: r2 = r1*n;
                   2064: 
                   2065: fm/    ( r1 n -- r2 )  gforth  fm_slash
                   2066: r2 = r1/n;
                   2067: 
                   2068: fm*/   ( r1 n1 n2 -- r2 )      gforth  fm_star_slash
                   2069: r2 = (r1*n1)/n2;
                   2070: 
                   2071: f**2   ( r1 -- r2 )    gforth  fm_square
                   2072: r2 = r1*r1;
1.1       anton    2073: 
1.47      anton    2074: fnegate        ( r1 -- r2 )    float   f_negate
1.1       anton    2075: r2 = - r1;
                   2076: 
1.47      anton    2077: fdrop  ( r -- )                float   f_drop
1.1       anton    2078: 
1.47      anton    2079: fdup   ( r -- r r )    float   f_dupe
1.1       anton    2080: 
1.47      anton    2081: fswap  ( r1 r2 -- r2 r1 )      float   f_swap
1.1       anton    2082: 
1.47      anton    2083: fover  ( r1 r2 -- r1 r2 r1 )   float   f_over
1.1       anton    2084: 
1.47      anton    2085: frot   ( r1 r2 r3 -- r2 r3 r1 )        float   f_rote
1.1       anton    2086: 
1.47      anton    2087: fnip   ( r1 r2 -- r2 ) gforth  f_nip
1.1       anton    2088: 
1.47      anton    2089: ftuck  ( r1 r2 -- r2 r1 r2 )   gforth  f_tuck
1.1       anton    2090: 
1.47      anton    2091: float+ ( f_addr1 -- f_addr2 )  float   float_plus
1.52      anton    2092: ""@code{1 floats +}.""
1.1       anton    2093: f_addr2 = f_addr1+1;
                   2094: 
1.47      anton    2095: floats ( n1 -- n2 )    float
1.52      anton    2096: ""@i{n2} is the number of address units of @i{n1} floats.""
1.1       anton    2097: n2 = n1*sizeof(Float);
                   2098: 
1.47      anton    2099: floor  ( r1 -- r2 )    float
1.26      crook    2100: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1.1       anton    2101: /* !! unclear wording */
                   2102: r2 = floor(r1);
                   2103: 
1.216     anton    2104: fround ( r1 -- r2 )    float   f_round
1.105     anton    2105: ""Round to the nearest integral value.""
1.1       anton    2106: r2 = rint(r1);
                   2107: 
1.47      anton    2108: fmax   ( r1 r2 -- r3 ) float   f_max
1.1       anton    2109: if (r1<r2)
                   2110:   r3 = r2;
                   2111: else
                   2112:   r3 = r1;
                   2113: 
1.47      anton    2114: fmin   ( r1 r2 -- r3 ) float   f_min
1.1       anton    2115: if (r1<r2)
                   2116:   r3 = r1;
                   2117: else
                   2118:   r3 = r2;
                   2119: 
1.47      anton    2120: represent      ( r c_addr u -- n f1 f2 )       float
1.1       anton    2121: char *sig;
1.122     anton    2122: size_t siglen;
1.1       anton    2123: int flag;
                   2124: int decpt;
                   2125: sig=ecvt(r, u, &decpt, &flag);
1.122     anton    2126: n=(r==0. ? 1 : decpt);
1.1       anton    2127: f1=FLAG(flag!=0);
1.21      anton    2128: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1.190     pazsan   2129: siglen=strlen((char *)sig);
1.124     anton    2130: if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
                   2131:   siglen=u;
1.170     anton    2132: if (!f2) /* workaround Cygwin trailing 0s for Inf and Nan */
                   2133:   for (; sig[siglen-1]=='0'; siglen--);
                   2134:     ;
1.122     anton    2135: memcpy(c_addr,sig,siglen);
1.123     anton    2136: memset(c_addr+siglen,f2?'0':' ',u-siglen);
1.1       anton    2137: 
1.172     anton    2138: >float ( c_addr u -- f:... flag )      float   to_float
1.56      anton    2139: ""Actual stack effect: ( c_addr u -- r t | f ).  Attempt to convert the
                   2140: character string @i{c-addr u} to internal floating-point
                   2141: representation. If the string represents a valid floating-point number
                   2142: @i{r} is placed on the floating-point stack and @i{flag} is
                   2143: true. Otherwise, @i{flag} is false. A string of blanks is a special
                   2144: case and represents the floating-point number 0.""
1.1       anton    2145: Float r;
1.125     anton    2146: flag = to_float(c_addr, u, &r);
                   2147: if (flag) {
1.172     anton    2148:   fp--;
                   2149:   fp[0]=r;
1.1       anton    2150: }
                   2151: 
1.47      anton    2152: fabs   ( r1 -- r2 )    float-ext       f_abs
1.1       anton    2153: r2 = fabs(r1);
                   2154: 
1.47      anton    2155: facos  ( r1 -- r2 )    float-ext       f_a_cos
1.1       anton    2156: r2 = acos(r1);
                   2157: 
1.47      anton    2158: fasin  ( r1 -- r2 )    float-ext       f_a_sine
1.1       anton    2159: r2 = asin(r1);
                   2160: 
1.47      anton    2161: fatan  ( r1 -- r2 )    float-ext       f_a_tan
1.1       anton    2162: r2 = atan(r1);
                   2163: 
1.47      anton    2164: fatan2 ( r1 r2 -- r3 ) float-ext       f_a_tan_two
1.26      crook    2165: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1.1       anton    2166: intends this to be the inverse of @code{fsincos}. In gforth it is.""
                   2167: r3 = atan2(r1,r2);
                   2168: 
1.47      anton    2169: fcos   ( r1 -- r2 )    float-ext       f_cos
1.1       anton    2170: r2 = cos(r1);
                   2171: 
1.47      anton    2172: fexp   ( r1 -- r2 )    float-ext       f_e_x_p
1.1       anton    2173: r2 = exp(r1);
                   2174: 
1.47      anton    2175: fexpm1 ( r1 -- r2 )    float-ext       f_e_x_p_m_one
1.1       anton    2176: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
                   2177: #ifdef HAVE_EXPM1
1.3       pazsan   2178: extern double
                   2179: #ifdef NeXT
                   2180:               const
                   2181: #endif
                   2182:                     expm1(double);
1.1       anton    2183: r2 = expm1(r1);
                   2184: #else
                   2185: r2 = exp(r1)-1.;
                   2186: #endif
                   2187: 
1.47      anton    2188: fln    ( r1 -- r2 )    float-ext       f_l_n
1.1       anton    2189: r2 = log(r1);
                   2190: 
1.47      anton    2191: flnp1  ( r1 -- r2 )    float-ext       f_l_n_p_one
1.1       anton    2192: ""@i{r2}=ln(@i{r1}+1)""
                   2193: #ifdef HAVE_LOG1P
1.3       pazsan   2194: extern double
                   2195: #ifdef NeXT
                   2196:               const
                   2197: #endif
                   2198:                     log1p(double);
1.1       anton    2199: r2 = log1p(r1);
                   2200: #else
                   2201: r2 = log(r1+1.);
                   2202: #endif
                   2203: 
1.47      anton    2204: flog   ( r1 -- r2 )    float-ext       f_log
1.26      crook    2205: ""The decimal logarithm.""
1.1       anton    2206: r2 = log10(r1);
                   2207: 
1.47      anton    2208: falog  ( r1 -- r2 )    float-ext       f_a_log
1.1       anton    2209: ""@i{r2}=10**@i{r1}""
                   2210: extern double pow10(double);
                   2211: r2 = pow10(r1);
                   2212: 
1.47      anton    2213: fsin   ( r1 -- r2 )    float-ext       f_sine
1.1       anton    2214: r2 = sin(r1);
                   2215: 
1.47      anton    2216: fsincos        ( r1 -- r2 r3 ) float-ext       f_sine_cos
1.1       anton    2217: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
                   2218: r2 = sin(r1);
                   2219: r3 = cos(r1);
                   2220: 
1.47      anton    2221: fsqrt  ( r1 -- r2 )    float-ext       f_square_root
1.1       anton    2222: r2 = sqrt(r1);
                   2223: 
1.47      anton    2224: ftan   ( r1 -- r2 )    float-ext       f_tan
1.1       anton    2225: r2 = tan(r1);
                   2226: :
                   2227:  fsincos f/ ;
                   2228: 
1.47      anton    2229: fsinh  ( r1 -- r2 )    float-ext       f_cinch
1.1       anton    2230: r2 = sinh(r1);
                   2231: :
                   2232:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
                   2233: 
1.47      anton    2234: fcosh  ( r1 -- r2 )    float-ext       f_cosh
1.1       anton    2235: r2 = cosh(r1);
                   2236: :
                   2237:  fexp fdup 1/f f+ f2/ ;
                   2238: 
1.47      anton    2239: ftanh  ( r1 -- r2 )    float-ext       f_tan_h
1.1       anton    2240: r2 = tanh(r1);
                   2241: :
                   2242:  f2* fexpm1 fdup 2. d>f f+ f/ ;
                   2243: 
1.47      anton    2244: fasinh ( r1 -- r2 )    float-ext       f_a_cinch
1.1       anton    2245: r2 = asinh(r1);
                   2246: :
                   2247:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
                   2248: 
1.47      anton    2249: facosh ( r1 -- r2 )    float-ext       f_a_cosh
1.1       anton    2250: r2 = acosh(r1);
                   2251: :
                   2252:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
                   2253: 
1.47      anton    2254: fatanh ( r1 -- r2 )    float-ext       f_a_tan_h
1.1       anton    2255: r2 = atanh(r1);
                   2256: :
                   2257:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
                   2258:  r> IF  fnegate  THEN ;
                   2259: 
1.47      anton    2260: sfloats        ( n1 -- n2 )    float-ext       s_floats
1.52      anton    2261: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2262: single-precision IEEE floating-point numbers.""
1.1       anton    2263: n2 = n1*sizeof(SFloat);
                   2264: 
1.47      anton    2265: dfloats        ( n1 -- n2 )    float-ext       d_floats
1.52      anton    2266: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2267: double-precision IEEE floating-point numbers.""
1.1       anton    2268: n2 = n1*sizeof(DFloat);
                   2269: 
1.47      anton    2270: sfaligned      ( c_addr -- sf_addr )   float-ext       s_f_aligned
1.52      anton    2271: ""@i{sf-addr} is the first single-float-aligned address greater
1.29      crook    2272: than or equal to @i{c-addr}.""
1.1       anton    2273: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
                   2274: :
                   2275:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
                   2276: 
1.47      anton    2277: dfaligned      ( c_addr -- df_addr )   float-ext       d_f_aligned
1.52      anton    2278: ""@i{df-addr} is the first double-float-aligned address greater
1.29      crook    2279: than or equal to @i{c-addr}.""
1.1       anton    2280: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
                   2281: :
                   2282:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
                   2283: 
1.112     pazsan   2284: v*     ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
                   2285: ""dot-product: r=v1*v2.  The first element of v1 is at f_addr1, the
                   2286: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
                   2287: ucount elements.""
1.125     anton    2288: r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
1.112     pazsan   2289: :
                   2290:  >r swap 2swap swap 0e r> 0 ?DO
                   2291:      dup f@ over + 2swap dup f@ f* f+ over + 2swap
                   2292:  LOOP 2drop 2drop ; 
                   2293: 
                   2294: faxpy  ( ra f_x nstridex f_y nstridey ucount -- )      gforth
                   2295: ""vy=ra*vx+vy""
1.125     anton    2296: faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
1.112     pazsan   2297: :
                   2298:  >r swap 2swap swap r> 0 ?DO
                   2299:      fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
                   2300:  LOOP 2drop 2drop fdrop ;
                   2301: 
                   2302: \+
                   2303: 
1.1       anton    2304: \ The following words access machine/OS/installation-dependent
                   2305: \   Gforth internals
                   2306: \ !! how about environmental queries DIRECT-THREADED,
                   2307: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
                   2308: 
                   2309: \ local variable implementation primitives
1.112     pazsan   2310: 
1.15      pazsan   2311: \+glocals
1.1       anton    2312: 
1.110     pazsan   2313: \g locals
                   2314: 
1.68      anton    2315: @local#        ( #noffset -- w )       gforth  fetch_local_number
                   2316: w = *(Cell *)(lp+noffset);
1.1       anton    2317: 
1.47      anton    2318: @local0        ( -- w )        new     fetch_local_zero
1.112     pazsan   2319: w = ((Cell *)lp)[0];
1.1       anton    2320: 
1.47      anton    2321: @local1        ( -- w )        new     fetch_local_four
1.112     pazsan   2322: w = ((Cell *)lp)[1];
1.1       anton    2323: 
1.47      anton    2324: @local2        ( -- w )        new     fetch_local_eight
1.112     pazsan   2325: w = ((Cell *)lp)[2];
1.1       anton    2326: 
1.47      anton    2327: @local3        ( -- w )        new     fetch_local_twelve
1.112     pazsan   2328: w = ((Cell *)lp)[3];
1.1       anton    2329: 
1.15      pazsan   2330: \+floating
1.1       anton    2331: 
1.68      anton    2332: f@local#       ( #noffset -- r )       gforth  f_fetch_local_number
                   2333: r = *(Float *)(lp+noffset);
1.1       anton    2334: 
1.47      anton    2335: f@local0       ( -- r )        new     f_fetch_local_zero
1.112     pazsan   2336: r = ((Float *)lp)[0];
1.1       anton    2337: 
1.47      anton    2338: f@local1       ( -- r )        new     f_fetch_local_eight
1.112     pazsan   2339: r = ((Float *)lp)[1];
1.1       anton    2340: 
1.15      pazsan   2341: \+
1.1       anton    2342: 
1.68      anton    2343: laddr# ( #noffset -- c_addr )  gforth  laddr_number
1.1       anton    2344: /* this can also be used to implement lp@ */
1.68      anton    2345: c_addr = (Char *)(lp+noffset);
1.1       anton    2346: 
1.68      anton    2347: lp+!#  ( #noffset -- ) gforth  lp_plus_store_number
1.1       anton    2348: ""used with negative immediate values it allocates memory on the
                   2349: local stack, a positive immediate argument drops memory from the local
                   2350: stack""
1.68      anton    2351: lp += noffset;
1.1       anton    2352: 
1.47      anton    2353: lp-    ( -- )  new     minus_four_lp_plus_store
1.1       anton    2354: lp += -sizeof(Cell);
                   2355: 
1.47      anton    2356: lp+    ( -- )  new     eight_lp_plus_store
1.1       anton    2357: lp += sizeof(Float);
                   2358: 
1.47      anton    2359: lp+2   ( -- )  new     sixteen_lp_plus_store
1.1       anton    2360: lp += 2*sizeof(Float);
                   2361: 
1.47      anton    2362: lp!    ( c_addr -- )   gforth  lp_store
1.1       anton    2363: lp = (Address)c_addr;
                   2364: 
1.47      anton    2365: >l     ( w -- )        gforth  to_l
1.1       anton    2366: lp -= sizeof(Cell);
                   2367: *(Cell *)lp = w;
                   2368: 
1.15      pazsan   2369: \+floating
1.1       anton    2370: 
1.47      anton    2371: f>l    ( r -- )        gforth  f_to_l
1.1       anton    2372: lp -= sizeof(Float);
                   2373: *(Float *)lp = r;
                   2374: 
1.172     anton    2375: fpick  ( f:... u -- f:... r )          gforth
1.52      anton    2376: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
1.172     anton    2377: r = fp[u];
1.11      anton    2378: :
                   2379:  floats fp@ + f@ ;
                   2380: 
1.15      pazsan   2381: \+
                   2382: \+
1.1       anton    2383: 
1.15      pazsan   2384: \+OS
1.1       anton    2385: 
1.110     pazsan   2386: \g syslib
                   2387: 
1.131     pazsan   2388: open-lib       ( c_addr1 u1 -- u2 )    gforth  open_lib
                   2389: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2390: #ifndef RTLD_GLOBAL
                   2391: #define RTLD_GLOBAL 0
                   2392: #endif
                   2393: u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL | RTLD_LAZY);
                   2394: #else
                   2395: #  ifdef _WIN32
                   2396: u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
                   2397: #  else
                   2398: #warning Define open-lib!
                   2399: u2 = 0;
                   2400: #  endif
                   2401: #endif
                   2402: 
                   2403: lib-sym        ( c_addr1 u1 u2 -- u3 ) gforth  lib_sym
                   2404: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2405: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
                   2406: #else
                   2407: #  ifdef _WIN32
                   2408: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
                   2409: #  else
                   2410: #warning Define lib-sym!
                   2411: u3 = 0;
                   2412: #  endif
                   2413: #endif
                   2414: 
1.172     anton    2415: wcall  ( ... u -- ... )        gforth
1.185     pazsan   2416: gforth_FP=fp;
                   2417: sp=(Cell*)(SYSCALL(Cell*(*)(Cell *, void *))u)(sp, &gforth_FP);
                   2418: fp=gforth_FP;
1.142     pazsan   2419: 
1.186     anton    2420: uw@ ( c_addr -- u )    gforth u_w_fetch
                   2421: ""@i{u} is the zero-extended 16-bit value stored at @i{c_addr}.""
                   2422: u = *(UWyde*)(c_addr);
1.180     pazsan   2423: 
1.186     anton    2424: sw@ ( c_addr -- n )    gforth s_w_fetch
                   2425: ""@i{n} is the sign-extended 16-bit value stored at @i{c_addr}.""
                   2426: n = *(Wyde*)(c_addr);
1.180     pazsan   2427: 
1.186     anton    2428: w! ( w c_addr -- )     gforth w_store
                   2429: ""Store the bottom 16 bits of @i{w} at @i{c_addr}.""
                   2430: *(Wyde*)(c_addr) = w;
1.180     pazsan   2431: 
1.186     anton    2432: ul@ ( c_addr -- u )    gforth u_l_fetch
                   2433: ""@i{u} is the zero-extended 32-bit value stored at @i{c_addr}.""
                   2434: u = *(UTetrabyte*)(c_addr);
1.181     pazsan   2435: 
1.186     anton    2436: sl@ ( c_addr -- n )    gforth s_l_fetch
                   2437: ""@i{n} is the sign-extended 32-bit value stored at @i{c_addr}.""
                   2438: n = *(Tetrabyte*)(c_addr);
1.181     pazsan   2439: 
1.186     anton    2440: l! ( w c_addr -- )     gforth l_store
                   2441: ""Store the bottom 32 bits of @i{w} at @i{c_addr}.""
                   2442: *(Tetrabyte*)(c_addr) = w;
1.180     pazsan   2443: 
1.131     pazsan   2444: \+FFCALL
                   2445: 
1.136     pazsan   2446: av-start-void  ( c_addr -- )   gforth  av_start_void
1.131     pazsan   2447: av_start_void(alist, c_addr);
                   2448: 
1.136     pazsan   2449: av-start-int   ( c_addr -- )   gforth  av_start_int
1.131     pazsan   2450: av_start_int(alist, c_addr, &irv);
                   2451: 
1.136     pazsan   2452: av-start-float ( c_addr -- )   gforth  av_start_float
1.131     pazsan   2453: av_start_float(alist, c_addr, &frv);
                   2454: 
1.136     pazsan   2455: av-start-double        ( c_addr -- )   gforth  av_start_double
1.131     pazsan   2456: av_start_double(alist, c_addr, &drv);
                   2457: 
1.136     pazsan   2458: av-start-longlong      ( c_addr -- )   gforth  av_start_longlong
1.131     pazsan   2459: av_start_longlong(alist, c_addr, &llrv);
                   2460: 
1.136     pazsan   2461: av-start-ptr   ( c_addr -- )   gforth  av_start_ptr
1.131     pazsan   2462: av_start_ptr(alist, c_addr, void*, &prv);
                   2463: 
                   2464: av-int  ( w -- )  gforth  av_int
                   2465: av_int(alist, w);
                   2466: 
1.136     pazsan   2467: av-float       ( r -- )        gforth  av_float
1.131     pazsan   2468: av_float(alist, r);
                   2469: 
1.136     pazsan   2470: av-double      ( r -- )        gforth  av_double
1.131     pazsan   2471: av_double(alist, r);
                   2472: 
1.136     pazsan   2473: av-longlong    ( d -- )        gforth  av_longlong
1.158     pazsan   2474: #ifdef BUGGY_LL_SIZE
                   2475: av_longlong(alist, DLO(d));
1.151     pazsan   2476: #else
1.131     pazsan   2477: av_longlong(alist, d);
1.151     pazsan   2478: #endif
1.131     pazsan   2479: 
1.136     pazsan   2480: av-ptr ( c_addr -- )   gforth  av_ptr
1.131     pazsan   2481: av_ptr(alist, void*, c_addr);
                   2482: 
1.136     pazsan   2483: av-int-r  ( R:w -- )  gforth  av_int_r
                   2484: av_int(alist, w);
                   2485: 
                   2486: av-float-r     ( -- )  gforth  av_float_r
                   2487: float r = *(Float*)lp;
                   2488: lp += sizeof(Float);
                   2489: av_float(alist, r);
                   2490: 
                   2491: av-double-r    ( -- )  gforth  av_double_r
                   2492: double r = *(Float*)lp;
                   2493: lp += sizeof(Float);
                   2494: av_double(alist, r);
                   2495: 
                   2496: av-longlong-r  ( R:d -- )      gforth  av_longlong_r
1.158     pazsan   2497: #ifdef BUGGY_LL_SIZE
                   2498: av_longlong(alist, DLO(d));
1.151     pazsan   2499: #else
1.136     pazsan   2500: av_longlong(alist, d);
1.151     pazsan   2501: #endif
1.136     pazsan   2502: 
                   2503: av-ptr-r       ( R:c_addr -- ) gforth  av_ptr_r
                   2504: av_ptr(alist, void*, c_addr);
                   2505: 
1.173     anton    2506: av-call-void   ( ... -- ... )  gforth  av_call_void
1.131     pazsan   2507: SAVE_REGS
                   2508: av_call(alist);
                   2509: REST_REGS
                   2510: 
1.173     anton    2511: av-call-int    ( ... -- ... w )        gforth  av_call_int
1.131     pazsan   2512: SAVE_REGS
                   2513: av_call(alist);
1.134     pazsan   2514: REST_REGS
1.131     pazsan   2515: w = irv;
                   2516: 
1.173     anton    2517: av-call-float  ( ... -- ... r )        gforth  av_call_float
1.131     pazsan   2518: SAVE_REGS
                   2519: av_call(alist);
                   2520: REST_REGS
                   2521: r = frv;
                   2522: 
1.173     anton    2523: av-call-double ( ... -- ... r )        gforth  av_call_double
1.131     pazsan   2524: SAVE_REGS
                   2525: av_call(alist);
                   2526: REST_REGS
                   2527: r = drv;
                   2528: 
1.173     anton    2529: av-call-longlong       ( ... -- ... d )        gforth  av_call_longlong
1.131     pazsan   2530: SAVE_REGS
                   2531: av_call(alist);
                   2532: REST_REGS
1.151     pazsan   2533: #ifdef BUGGY_LONG_LONG
1.158     pazsan   2534: DLO_IS(d, llrv);
                   2535: DHI_IS(d, 0);
1.152     pazsan   2536: #else
                   2537: d = llrv;
1.151     pazsan   2538: #endif
1.131     pazsan   2539: 
1.173     anton    2540: av-call-ptr    ( ... -- ... c_addr )   gforth  av_call_ptr
1.131     pazsan   2541: SAVE_REGS
                   2542: av_call(alist);
                   2543: REST_REGS
                   2544: c_addr = prv;
                   2545: 
1.135     pazsan   2546: alloc-callback ( a_ip -- c_addr )      gforth  alloc_callback
1.185     pazsan   2547: c_addr = (char *)alloc_callback(gforth_callback, (Xt *)a_ip);
1.131     pazsan   2548: 
1.135     pazsan   2549: va-start-void  ( -- )  gforth  va_start_void
1.191     pazsan   2550: va_start_void(gforth_clist);
1.131     pazsan   2551: 
1.135     pazsan   2552: va-start-int   ( -- )  gforth  va_start_int
1.191     pazsan   2553: va_start_int(gforth_clist);
1.131     pazsan   2554: 
1.135     pazsan   2555: va-start-longlong      ( -- )  gforth  va_start_longlong
1.191     pazsan   2556: va_start_longlong(gforth_clist);
1.131     pazsan   2557: 
1.135     pazsan   2558: va-start-ptr   ( -- )  gforth  va_start_ptr
1.191     pazsan   2559: va_start_ptr(gforth_clist, (char *));
1.131     pazsan   2560: 
1.135     pazsan   2561: va-start-float ( -- )  gforth  va_start_float
1.191     pazsan   2562: va_start_float(gforth_clist);
1.135     pazsan   2563: 
                   2564: va-start-double        ( -- )  gforth  va_start_double
1.191     pazsan   2565: va_start_double(gforth_clist);
1.135     pazsan   2566: 
                   2567: va-arg-int     ( -- w )        gforth  va_arg_int
1.191     pazsan   2568: w = va_arg_int(gforth_clist);
1.135     pazsan   2569: 
                   2570: va-arg-longlong        ( -- d )        gforth  va_arg_longlong
1.151     pazsan   2571: #ifdef BUGGY_LONG_LONG
1.191     pazsan   2572: DLO_IS(d, va_arg_longlong(gforth_clist));
1.158     pazsan   2573: DHI_IS(d, 0);
1.151     pazsan   2574: #else
1.191     pazsan   2575: d = va_arg_longlong(gforth_clist);
1.151     pazsan   2576: #endif
1.135     pazsan   2577: 
                   2578: va-arg-ptr     ( -- c_addr )   gforth  va_arg_ptr
1.191     pazsan   2579: c_addr = (char *)va_arg_ptr(gforth_clist,char*);
1.135     pazsan   2580: 
                   2581: va-arg-float   ( -- r )        gforth  va_arg_float
1.191     pazsan   2582: r = va_arg_float(gforth_clist);
1.135     pazsan   2583: 
                   2584: va-arg-double  ( -- r )        gforth  va_arg_double
1.191     pazsan   2585: r = va_arg_double(gforth_clist);
1.131     pazsan   2586: 
                   2587: va-return-void ( -- )  gforth va_return_void
1.191     pazsan   2588: va_return_void(gforth_clist);
1.131     pazsan   2589: return 0;
                   2590: 
                   2591: va-return-int ( w -- ) gforth va_return_int
1.191     pazsan   2592: va_return_int(gforth_clist, w);
1.131     pazsan   2593: return 0;
                   2594: 
                   2595: va-return-ptr ( c_addr -- )    gforth va_return_ptr
1.191     pazsan   2596: va_return_ptr(gforth_clist, void *, c_addr);
1.131     pazsan   2597: return 0;
                   2598: 
                   2599: va-return-longlong ( d -- )    gforth va_return_longlong
1.151     pazsan   2600: #ifdef BUGGY_LONG_LONG
1.191     pazsan   2601: va_return_longlong(gforth_clist, d.lo);
1.151     pazsan   2602: #else
1.191     pazsan   2603: va_return_longlong(gforth_clist, d);
1.151     pazsan   2604: #endif
1.131     pazsan   2605: return 0;
                   2606: 
                   2607: va-return-float ( r -- )       gforth va_return_float
1.191     pazsan   2608: va_return_float(gforth_clist, r);
1.131     pazsan   2609: return 0;
                   2610: 
                   2611: va-return-double ( r -- )      gforth va_return_double
1.191     pazsan   2612: va_return_double(gforth_clist, r);
1.131     pazsan   2613: return 0;
                   2614: 
1.142     pazsan   2615: \+
                   2616: 
1.175     pazsan   2617: \+LIBFFI
                   2618: 
                   2619: ffi-type ( n -- a_type )       gforth ffi_type
                   2620: static void* ffi_types[] =
                   2621:     { &ffi_type_void,
                   2622:       &ffi_type_uint8, &ffi_type_sint8,
                   2623:       &ffi_type_uint16, &ffi_type_sint16,
                   2624:       &ffi_type_uint32, &ffi_type_sint32,
                   2625:       &ffi_type_uint64, &ffi_type_sint64,
                   2626:       &ffi_type_float, &ffi_type_double, &ffi_type_longdouble,
                   2627:       &ffi_type_pointer };
                   2628: a_type = ffi_types[n];
                   2629: 
                   2630: ffi-size ( n1 -- n2 )  gforth ffi_size
                   2631: static int ffi_sizes[] =
                   2632:     { sizeof(ffi_cif), sizeof(ffi_closure) };
                   2633: n2 = ffi_sizes[n1];
                   2634: 
                   2635: ffi-prep-cif ( a_atypes n a_rtype a_cif -- w ) gforth ffi_prep_cif
1.190     pazsan   2636: w = ffi_prep_cif((ffi_cif *)a_cif, FFI_DEFAULT_ABI, n,
                   2637:         (ffi_type *)a_rtype, (ffi_type **)a_atypes);
1.175     pazsan   2638: 
                   2639: ffi-call ( a_avalues a_rvalue a_ip a_cif -- )  gforth ffi_call
1.183     pazsan   2640: SAVE_REGS
1.190     pazsan   2641: ffi_call((ffi_cif *)a_cif, (void(*)())a_ip, (void *)a_rvalue, (void **)a_avalues);
1.183     pazsan   2642: REST_REGS
1.175     pazsan   2643: 
                   2644: ffi-prep-closure ( a_ip a_cif a_closure -- w ) gforth ffi_prep_closure
1.190     pazsan   2645: w = ffi_prep_closure((ffi_closure *)a_closure, (ffi_cif *)a_cif, gforth_callback, (void *)a_ip);
1.178     pazsan   2646: 
1.175     pazsan   2647: ffi-2@ ( a_addr -- d ) gforth ffi_2fetch
                   2648: #ifdef BUGGY_LONG_LONG
1.195     pazsan   2649: DLO_IS(d, *(Cell*)(*a_addr));
1.175     pazsan   2650: DHI_IS(d, 0);
                   2651: #else
1.179     pazsan   2652: d = *(DCell*)(a_addr);
1.175     pazsan   2653: #endif
                   2654: 
                   2655: ffi-2! ( d a_addr -- ) gforth ffi_2store
                   2656: #ifdef BUGGY_LONG_LONG
                   2657: *(Cell*)(a_addr) = DLO(d);
                   2658: #else
                   2659: *(DCell*)(a_addr) = d;
                   2660: #endif
                   2661: 
                   2662: ffi-arg-int ( -- w )   gforth ffi_arg_int
1.191     pazsan   2663: w = *(int *)(*gforth_clist++);
1.175     pazsan   2664: 
1.194     pazsan   2665: ffi-arg-long ( -- w )  gforth ffi_arg_long
                   2666: w = *(long *)(*gforth_clist++);
                   2667: 
1.175     pazsan   2668: ffi-arg-longlong ( -- d )      gforth ffi_arg_longlong
                   2669: #ifdef BUGGY_LONG_LONG
1.195     pazsan   2670: DLO_IS(d, *(Cell*)(*gforth_clist++));
                   2671: DHI_IS(d, -(*(Cell*)(*gforth_clist++)<0));
1.175     pazsan   2672: #else
1.191     pazsan   2673: d = *(DCell*)(*gforth_clist++);
1.175     pazsan   2674: #endif
                   2675: 
1.194     pazsan   2676: ffi-arg-dlong ( -- d ) gforth ffi_arg_dlong
                   2677: #ifdef BUGGY_LONG_LONG
1.195     pazsan   2678: DLO_IS(d, *(Cell*)(*gforth_clist++));
                   2679: DHI_IS(d, -(*(Cell*)(*gforth_clist++)<0));
1.194     pazsan   2680: #else
                   2681: d = *(Cell*)(*gforth_clist++);
                   2682: #endif
                   2683: 
1.175     pazsan   2684: ffi-arg-ptr ( -- c_addr )      gforth ffi_arg_ptr
1.191     pazsan   2685: c_addr = *(Char **)(*gforth_clist++);
1.175     pazsan   2686: 
                   2687: ffi-arg-float ( -- r ) gforth ffi_arg_float
1.191     pazsan   2688: r = *(float*)(*gforth_clist++);
1.175     pazsan   2689: 
                   2690: ffi-arg-double ( -- r )        gforth ffi_arg_double
1.191     pazsan   2691: r = *(double*)(*gforth_clist++);
1.175     pazsan   2692: 
1.178     pazsan   2693: ffi-ret-void ( -- )    gforth ffi_ret_void
                   2694: return 0;
                   2695: 
                   2696: ffi-ret-int ( w -- )   gforth ffi_ret_int
1.191     pazsan   2697: *(int*)(gforth_ritem) = w;
1.178     pazsan   2698: return 0;
1.175     pazsan   2699: 
1.178     pazsan   2700: ffi-ret-longlong ( d -- )      gforth ffi_ret_longlong
1.175     pazsan   2701: #ifdef BUGGY_LONG_LONG
1.191     pazsan   2702: *(Cell*)(gforth_ritem) = DLO(d);
1.175     pazsan   2703: #else
1.191     pazsan   2704: *(DCell*)(gforth_ritem) = d;
1.194     pazsan   2705: #endif
                   2706: return 0;
                   2707: 
                   2708: ffi-ret-dlong ( d -- ) gforth ffi_ret_dlong
                   2709: #ifdef BUGGY_LONG_LONG
                   2710: *(Cell*)(gforth_ritem) = DLO(d);
                   2711: #else
                   2712: *(Cell*)(gforth_ritem) = d;
                   2713: #endif
                   2714: return 0;
                   2715: 
                   2716: ffi-ret-long ( n -- )  gforth ffi_ret_long
                   2717: *(Cell*)(gforth_ritem) = n;
1.178     pazsan   2718: return 0;
1.175     pazsan   2719: 
1.178     pazsan   2720: ffi-ret-ptr ( c_addr -- )      gforth ffi_ret_ptr
1.191     pazsan   2721: *(Char **)(gforth_ritem) = c_addr;
1.178     pazsan   2722: return 0;
1.175     pazsan   2723: 
1.178     pazsan   2724: ffi-ret-float ( r -- ) gforth ffi_ret_float
1.191     pazsan   2725: *(float*)(gforth_ritem) = r;
1.178     pazsan   2726: return 0;
1.175     pazsan   2727: 
1.178     pazsan   2728: ffi-ret-double ( r -- )        gforth ffi_ret_double
1.191     pazsan   2729: *(double*)(gforth_ritem) = r;
1.178     pazsan   2730: return 0;
1.175     pazsan   2731: 
                   2732: \+
                   2733: 
1.142     pazsan   2734: \+OLDCALL
1.131     pazsan   2735: 
1.1       anton    2736: define(`uploop',
                   2737:        `pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
                   2738: define(`_uploop',
                   2739:        `ifelse($1, `$3', `$5',
                   2740:               `$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
1.206     anton    2741: 
1.1       anton    2742: \ argflist(argnum): Forth argument list
                   2743: define(argflist,
                   2744:        `ifelse($1, 0, `',
1.206     anton    2745:                `uploop(`_i', 1, $1, ``u''`_i ', ``u''`_i')')')
1.1       anton    2746: \ argdlist(argnum): declare C's arguments
                   2747: define(argdlist,
                   2748:        `ifelse($1, 0, `',
                   2749:                `uploop(`_i', 1, $1, `Cell, ', `Cell')')')
                   2750: \ argclist(argnum): pass C's arguments
                   2751: define(argclist,
                   2752:        `ifelse($1, 0, `',
1.206     anton    2753:                `uploop(`_i', 1, $1, ``u''`_i, ', ``u''`_i')')')
1.1       anton    2754: \ icall(argnum)
                   2755: define(icall,
1.206     anton    2756: `icall$1       ( argflist($1) u -- uret )      gforth
1.9       pazsan   2757: uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2758: 
                   2759: ')
                   2760: define(fcall,
1.206     anton    2761: `fcall$1       ( argflist($1) u -- rret )      gforth
1.9       pazsan   2762: rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2763: 
                   2764: ')
                   2765: 
1.46      pazsan   2766: \ close ' to keep fontify happy
1.1       anton    2767: 
                   2768: uploop(i, 0, 7, `icall(i)')
                   2769: icall(20)
                   2770: uploop(i, 0, 7, `fcall(i)')
                   2771: fcall(20)
                   2772: 
1.15      pazsan   2773: \+
1.131     pazsan   2774: \+
1.1       anton    2775: 
1.142     pazsan   2776: \g peephole
1.46      pazsan   2777: 
1.112     pazsan   2778: \+peephole
                   2779: 
1.119     anton    2780: compile-prim1 ( a_prim -- ) gforth compile_prim1
                   2781: ""compile prim (incl. immargs) at @var{a_prim}""
                   2782: compile_prim1(a_prim);
                   2783: 
1.172     anton    2784: finish-code ( ... -- ... ) gforth finish_code
1.119     anton    2785: ""Perform delayed steps in code generation (branch resolution, I-cache
                   2786: flushing).""
1.172     anton    2787: /* The ... above are a workaround for a bug in gcc-2.95, which fails
                   2788:    to save spTOS (gforth-fast --enable-force-reg) */
1.119     anton    2789: finish_code();
                   2790: 
                   2791: forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
                   2792: f = forget_dyncode(c_code);
                   2793: 
                   2794: decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
                   2795: ""a_prim is the code address of the primitive that has been
                   2796: compile_prim1ed to a_code""
1.121     anton    2797: a_prim = (Cell *)decompile_code((Label)a_code);
1.119     anton    2798: 
1.112     pazsan   2799: \ set-next-code and call2 do not appear in images and can be
                   2800: \ renumbered arbitrarily
1.46      pazsan   2801: 
1.112     pazsan   2802: set-next-code ( #w -- ) gforth set_next_code
                   2803: #ifdef NO_IP
                   2804: next_code = (Label)w;
                   2805: #endif
1.34      jwilke   2806: 
1.112     pazsan   2807: call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
                   2808: /* call with explicit return address */
                   2809: #ifdef NO_IP
                   2810: INST_TAIL;
                   2811: JUMP(a_callee);
1.45      anton    2812: #else
1.112     pazsan   2813: assert(0);
1.45      anton    2814: #endif
1.131     pazsan   2815: 
                   2816: tag-offsets ( -- a_addr ) gforth tag_offsets
                   2817: extern Cell groups[32];
                   2818: a_addr = groups;
1.51      anton    2819: 
1.54      pazsan   2820: \+
1.128     anton    2821: 
                   2822: \g static_super
                   2823: 
1.173     anton    2824: ifdef(`STACK_CACHE_FILE',
1.147     anton    2825: `include(peeprules.vmg)')
1.54      pazsan   2826: 
1.112     pazsan   2827: \g end

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