Annotation of gforth/prim, revision 1.210

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;
                    212: goto **(Label *)DOES_CODE1(CFA);
                    213: #else /* !defined(NO_IP) */
1.141     anton     214: a_retaddr = (Cell *)IP;
1.139     anton     215: a_body = PFA(CFA);
                    216: SET_IP(DOES_CODE1(CFA));
1.148     anton     217: #endif /* !defined(NO_IP) */
1.139     anton     218: 
                    219: (does-handler) ( -- )  gforth-internal paren_does_handler
                    220: ""just a slot to have an encoding for the DOESJUMP, 
                    221: which is no longer used anyway (!! eliminate this)""
1.140     anton     222: 
                    223: \F [endif]
1.139     anton     224: 
1.83      pazsan    225: \g control
                    226: 
1.47      anton     227: noop   ( -- )          gforth
1.1       anton     228: :
                    229:  ;
                    230: 
1.112     pazsan    231: call   ( #a_callee -- R:a_retaddr )    new
                    232: ""Call callee (a variant of docol with inline argument).""
                    233: #ifdef NO_IP
1.148     anton     234: assert(0);
1.112     pazsan    235: INST_TAIL;
                    236: JUMP(a_callee);
                    237: #else
                    238: #ifdef DEBUG
                    239:     {
                    240:       CFA_TO_NAME((((Cell *)a_callee)-2));
                    241:       fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
                    242:              len,name);
                    243:     }
                    244: #endif
                    245: a_retaddr = (Cell *)IP;
                    246: SET_IP((Xt *)a_callee);
                    247: #endif
1.1       anton     248: 
1.47      anton     249: execute        ( xt -- )               core
1.29      crook     250: ""Perform the semantics represented by the execution token, @i{xt}.""
1.210   ! pazsan    251: #ifdef DEBUG
        !           252: fprintf(stderr, "execute %08x\n", xt);
        !           253: #endif
1.102     anton     254: #ifndef NO_IP
1.1       anton     255: ip=IP;
1.102     anton     256: #endif
1.76      anton     257: SUPER_END;
1.161     anton     258: VM_JUMP(EXEC1(xt));
1.1       anton     259: 
1.47      anton     260: perform        ( a_addr -- )   gforth
1.55      anton     261: ""@code{@@ execute}.""
1.1       anton     262: /* and pfe */
1.102     anton     263: #ifndef NO_IP
1.1       anton     264: ip=IP;
1.102     anton     265: #endif
1.76      anton     266: SUPER_END;
1.161     anton     267: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.1       anton     268: :
                    269:  @ execute ;
                    270: 
1.112     pazsan    271: ;s     ( R:w -- )              gforth  semis
                    272: ""The primitive compiled by @code{EXIT}.""
                    273: #ifdef NO_IP
                    274: INST_TAIL;
                    275: goto *(void *)w;
                    276: #else
                    277: SET_IP((Xt *)w);
                    278: #endif
                    279: 
                    280: unloop ( R:w1 R:w2 -- )        core
                    281: /* !! alias for 2rdrop */
                    282: :
                    283:  r> rdrop rdrop >r ;
                    284: 
                    285: lit-perform    ( #a_addr -- )  new     lit_perform
                    286: #ifndef NO_IP
                    287: ip=IP;
                    288: #endif
                    289: SUPER_END;
1.161     anton     290: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.112     pazsan    291: 
                    292: does-exec ( #a_cfa -- R:nest a_pfa )   new     does_exec
                    293: #ifdef NO_IP
                    294: /* compiled to LIT CALL by compile_prim */
                    295: assert(0);
                    296: #else
                    297: a_pfa = PFA(a_cfa);
                    298: nest = (Cell)IP;
                    299: #ifdef DEBUG
                    300:     {
                    301:       CFA_TO_NAME(a_cfa);
                    302:       fprintf(stderr,"%08lx: does %08lx %.*s\n",
                    303:              (Cell)ip,(Cell)a_cfa,len,name);
                    304:     }
                    305: #endif
                    306: SET_IP(DOES_CODE1(a_cfa));
                    307: #endif
                    308: 
1.15      pazsan    309: \+glocals
1.1       anton     310: 
1.112     pazsan    311: branch-lp+!# ( #a_target #nlocals -- ) gforth  branch_lp_plus_store_number
1.1       anton     312: /* this will probably not be used */
1.68      anton     313: lp += nlocals;
1.112     pazsan    314: #ifdef NO_IP
                    315: INST_TAIL;
                    316: JUMP(a_target);
                    317: #else
                    318: SET_IP((Xt *)a_target);
                    319: #endif
1.1       anton     320: 
1.15      pazsan    321: \+
1.1       anton     322: 
1.112     pazsan    323: branch ( #a_target -- )        gforth
                    324: #ifdef NO_IP
                    325: INST_TAIL;
                    326: JUMP(a_target);
                    327: #else
                    328: SET_IP((Xt *)a_target);
                    329: #endif
1.1       anton     330: :
1.112     pazsan    331:  r> @ >r ;
1.1       anton     332: 
1.112     pazsan    333: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
1.1       anton     334: \ this is non-syntactical: code must open a brace that is closed by the macro
1.159     anton     335: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
                    336: \ this is non-syntactical: code must open a brace that is closed by the macro
1.1       anton     337: define(condbranch,
1.159     anton     338: $1 ( `#'a_target $2 ) $3
                    339: $4     #ifdef NO_IP
                    340: INST_TAIL;
                    341: #endif
                    342: $5     #ifdef NO_IP
                    343: JUMP(a_target);
                    344: #else
                    345: SET_IP((Xt *)a_target);
                    346: #endif
                    347: }
                    348: $6
                    349: 
                    350: \+glocals
                    351: 
                    352: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
                    353: $4     #ifdef NO_IP
                    354: INST_TAIL;
                    355: #endif
                    356: $5     lp += nlocals;
                    357: #ifdef NO_IP
                    358: JUMP(a_target);
                    359: #else
                    360: SET_IP((Xt *)a_target);
                    361: #endif
                    362: }
                    363: 
                    364: \+
                    365: )
                    366: 
                    367: \ version that generates two jumps (not good for PR 15242 workaround)
                    368: define(condbranch_twojump,
1.112     pazsan    369: $1 ( `#'a_target $2 ) $3
                    370: $4     #ifdef NO_IP
1.96      anton     371: INST_TAIL;
1.112     pazsan    372: #endif
                    373: $5     #ifdef NO_IP
                    374: JUMP(a_target);
                    375: #else
                    376: SET_IP((Xt *)a_target);
                    377: INST_TAIL; NEXT_P2;
                    378: #endif
1.1       anton     379: }
1.87      anton     380: SUPER_CONTINUE;
1.112     pazsan    381: $6
1.1       anton     382: 
1.15      pazsan    383: \+glocals
1.1       anton     384: 
1.112     pazsan    385: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
                    386: $4     #ifdef NO_IP
1.96      anton     387: INST_TAIL;
1.112     pazsan    388: #endif
                    389: $5     lp += nlocals;
                    390: #ifdef NO_IP
                    391: JUMP(a_target);
                    392: #else
                    393: SET_IP((Xt *)a_target);
                    394: INST_TAIL; NEXT_P2;
                    395: #endif
1.1       anton     396: }
1.87      anton     397: SUPER_CONTINUE;
1.1       anton     398: 
1.15      pazsan    399: \+
1.1       anton     400: )
                    401: 
1.68      anton     402: condbranch(?branch,f --,f83    question_branch,
1.112     pazsan    403: ,if (f==0) {
1.5       jwilke    404: ,:
1.112     pazsan    405:  0= dup 0=          \ !f f
                    406:  r> tuck cell+      \ !f branchoffset f IP+
                    407:  and -rot @ and or  \ f&IP+|!f&branch
1.5       jwilke    408:  >r ;)
1.1       anton     409: 
                    410: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
                    411: \ is only used in if's (yet)
                    412: 
1.15      pazsan    413: \+xconds
1.1       anton     414: 
1.172     anton     415: ?dup-?branch   ( #a_target f -- S:... )        new     question_dupe_question_branch
1.1       anton     416: ""The run-time procedure compiled by @code{?DUP-IF}.""
                    417: if (f==0) {
1.112     pazsan    418: #ifdef NO_IP
                    419: INST_TAIL;
                    420: JUMP(a_target);
                    421: #else
                    422: SET_IP((Xt *)a_target);
                    423: #endif
1.174     anton     424: } else {
1.172     anton     425: sp--;
                    426: sp[0]=f;
1.174     anton     427: }
1.1       anton     428: 
1.172     anton     429: ?dup-0=-?branch ( #a_target f -- S:... ) new   question_dupe_zero_equals_question_branch
1.1       anton     430: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
                    431: if (f!=0) {
                    432:   sp--;
1.172     anton     433:   sp[0]=f;
1.112     pazsan    434: #ifdef NO_IP
                    435:   JUMP(a_target);
                    436: #else
                    437:   SET_IP((Xt *)a_target);
                    438: #endif
1.1       anton     439: }
                    440: 
1.15      pazsan    441: \+
1.31      jwilke    442: \fhas? skiploopprims 0= [IF]
1.1       anton     443: 
1.68      anton     444: condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
1.65      anton     445: n2=n1-1;
1.112     pazsan    446: ,if (n1) {
1.1       anton     447: ,:
                    448:  r> r> dup 1- >r
1.112     pazsan    449:  IF @ >r ELSE cell+ >r THEN ;)
1.1       anton     450: 
1.68      anton     451: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth        paren_loop,
1.65      anton     452: n2=n1+1;
1.112     pazsan    453: ,if (n2 != nlimit) {
1.1       anton     454: ,:
                    455:  r> r> 1+ r> 2dup =
                    456:  IF >r 1- >r cell+ >r
1.112     pazsan    457:  ELSE >r >r @ >r THEN ;)
1.1       anton     458: 
1.68      anton     459: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
1.1       anton     460: /* !! check this thoroughly */
                    461: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
                    462: /* dependent upon two's complement arithmetic */
1.65      anton     463: Cell olddiff = n1-nlimit;
                    464: n2=n1+n;       
1.149     anton     465: ,if (((olddiff^(olddiff+n))    /* the limit is not crossed */
                    466:      &(olddiff^n))            /* OR it is a wrap-around effect */
                    467:     >=0) { /* & is used to avoid having two branches for gforth-native */
1.1       anton     468: ,:
                    469:  r> swap
                    470:  r> r> 2dup - >r
                    471:  2 pick r@ + r@ xor 0< 0=
                    472:  3 pick r> xor 0< 0= or
1.112     pazsan    473:  IF    >r + >r @ >r
1.1       anton     474:  ELSE  >r >r drop cell+ >r THEN ;)
                    475: 
1.15      pazsan    476: \+xconds
1.1       anton     477: 
1.68      anton     478: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
1.65      anton     479: UCell olddiff = n1-nlimit;
                    480: n2=n1-u;
1.112     pazsan    481: ,if (olddiff>u) {
1.1       anton     482: ,)
                    483: 
1.68      anton     484: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth    paren_symmetric_plus_loop,
1.1       anton     485: ""The run-time procedure compiled by S+LOOP. It loops until the index
                    486: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
                    487: version of (+LOOP).""
                    488: /* !! check this thoroughly */
1.65      anton     489: Cell diff = n1-nlimit;
1.1       anton     490: Cell newdiff = diff+n;
                    491: if (n<0) {
                    492:     diff = -diff;
                    493:     newdiff = -newdiff;
                    494: }
1.65      anton     495: n2=n1+n;
1.149     anton     496: ,if (((~diff)|newdiff)<0) { /* use | to avoid two branches for gforth-native */
1.1       anton     497: ,)
                    498: 
1.15      pazsan    499: \+
1.1       anton     500: 
1.112     pazsan    501: (for)   ( ncount -- R:nlimit R:ncount )         cmFORTH         paren_for
1.1       anton     502: /* or (for) = >r -- collides with unloop! */
1.65      anton     503: nlimit=0;
1.1       anton     504: :
                    505:  r> swap 0 >r >r >r ;
                    506: 
1.112     pazsan    507: (do)    ( nlimit nstart -- R:nlimit R:nstart )  gforth          paren_do
1.1       anton     508: :
                    509:  r> swap rot >r >r >r ;
                    510: 
1.112     pazsan    511: (?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth  paren_question_do
                    512: #ifdef NO_IP
                    513:     INST_TAIL;
                    514: #endif
1.1       anton     515: if (nstart == nlimit) {
1.112     pazsan    516: #ifdef NO_IP
                    517:     JUMP(a_target);
                    518: #else
                    519:     SET_IP((Xt *)a_target);
                    520: #endif
1.1       anton     521: }
                    522: :
                    523:   2dup =
                    524:   IF   r> swap rot >r >r
1.112     pazsan    525:        @ >r
1.1       anton     526:   ELSE r> swap rot >r >r
                    527:        cell+ >r
                    528:   THEN ;                               \ --> CORE-EXT
                    529: 
1.15      pazsan    530: \+xconds
1.1       anton     531: 
1.112     pazsan    532: (+do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
                    533: #ifdef NO_IP
                    534:     INST_TAIL;
                    535: #endif
1.1       anton     536: if (nstart >= nlimit) {
1.112     pazsan    537: #ifdef NO_IP
                    538:     JUMP(a_target);
                    539: #else
                    540:     SET_IP((Xt *)a_target);
                    541: #endif
1.1       anton     542: }
                    543: :
                    544:  swap 2dup
                    545:  r> swap >r swap >r
                    546:  >=
                    547:  IF
1.112     pazsan    548:      @
1.1       anton     549:  ELSE
                    550:      cell+
                    551:  THEN  >r ;
                    552: 
1.112     pazsan    553: (u+do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
                    554: #ifdef NO_IP
                    555:     INST_TAIL;
                    556: #endif
1.1       anton     557: if (ustart >= ulimit) {
1.112     pazsan    558: #ifdef NO_IP
                    559: JUMP(a_target);
                    560: #else
                    561: SET_IP((Xt *)a_target);
                    562: #endif
1.1       anton     563: }
                    564: :
                    565:  swap 2dup
                    566:  r> swap >r swap >r
                    567:  u>=
                    568:  IF
1.112     pazsan    569:      @
1.1       anton     570:  ELSE
                    571:      cell+
                    572:  THEN  >r ;
                    573: 
1.112     pazsan    574: (-do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
                    575: #ifdef NO_IP
                    576:     INST_TAIL;
                    577: #endif
1.1       anton     578: if (nstart <= nlimit) {
1.112     pazsan    579: #ifdef NO_IP
                    580: JUMP(a_target);
                    581: #else
                    582: SET_IP((Xt *)a_target);
                    583: #endif
1.1       anton     584: }
                    585: :
                    586:  swap 2dup
                    587:  r> swap >r swap >r
                    588:  <=
                    589:  IF
1.112     pazsan    590:      @
1.1       anton     591:  ELSE
                    592:      cell+
                    593:  THEN  >r ;
                    594: 
1.112     pazsan    595: (u-do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
                    596: #ifdef NO_IP
                    597:     INST_TAIL;
                    598: #endif
1.1       anton     599: if (ustart <= ulimit) {
1.112     pazsan    600: #ifdef NO_IP
                    601: JUMP(a_target);
                    602: #else
                    603: SET_IP((Xt *)a_target);
                    604: #endif
1.1       anton     605: }
                    606: :
                    607:  swap 2dup
                    608:  r> swap >r swap >r
                    609:  u<=
                    610:  IF
1.112     pazsan    611:      @
1.1       anton     612:  ELSE
                    613:      cell+
                    614:  THEN  >r ;
                    615: 
1.15      pazsan    616: \+
1.1       anton     617: 
1.5       jwilke    618: \ don't make any assumptions where the return stack is!!
                    619: \ implement this in machine code if it should run quickly!
                    620: 
1.65      anton     621: i      ( R:n -- R:n n )                core
1.1       anton     622: :
1.5       jwilke    623: \ rp@ cell+ @ ;
                    624:   r> r> tuck >r >r ;
1.1       anton     625: 
1.65      anton     626: i'     ( R:w R:w2 -- R:w R:w2 w )              gforth          i_tick
1.1       anton     627: :
1.5       jwilke    628: \ rp@ cell+ cell+ @ ;
                    629:   r> r> r> dup itmp ! >r >r >r itmp @ ;
                    630: variable itmp
1.1       anton     631: 
1.65      anton     632: j      ( R:n R:d1 -- n R:n R:d1 )              core
1.1       anton     633: :
1.5       jwilke    634: \ rp@ cell+ cell+ cell+ @ ;
                    635:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
                    636: [IFUNDEF] itmp variable itmp [THEN]
1.1       anton     637: 
1.65      anton     638: k      ( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 )            gforth
1.1       anton     639: :
1.5       jwilke    640: \ rp@ [ 5 cells ] Literal + @ ;
                    641:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
                    642: [IFUNDEF] itmp variable itmp [THEN]
1.31      jwilke    643: 
                    644: \f[THEN]
1.1       anton     645: 
                    646: \ digit is high-level: 0/0%
                    647: 
1.83      pazsan    648: \g strings
                    649: 
1.47      anton     650: move   ( c_from c_to ucount -- )               core
1.52      anton     651: ""Copy the contents of @i{ucount} aus at @i{c-from} to
1.33      anton     652: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
1.52      anton     653: /* !! note that the standard specifies addr, not c-addr */
1.1       anton     654: memmove(c_to,c_from,ucount);
                    655: /* make an Ifdef for bsd and others? */
                    656: :
                    657:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
                    658: 
1.47      anton     659: cmove  ( c_from c_to u -- )    string  c_move
1.33      anton     660: ""Copy the contents of @i{ucount} characters from data space at
                    661: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    662: from low address to high address; i.e., for overlapping areas it is
                    663: safe if @i{c-to}=<@i{c-from}.""
1.125     anton     664: cmove(c_from,c_to,u);
1.1       anton     665: :
                    666:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
                    667: 
1.47      anton     668: cmove> ( c_from c_to u -- )    string  c_move_up
1.33      anton     669: ""Copy the contents of @i{ucount} characters from data space at
                    670: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    671: from high address to low address; i.e., for overlapping areas it is
                    672: safe if @i{c-to}>=@i{c-from}.""
1.125     anton     673: cmove_up(c_from,c_to,u);
1.1       anton     674: :
                    675:  dup 0= IF  drop 2drop exit  THEN
                    676:  rot over + -rot bounds swap 1-
                    677:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
                    678: 
1.47      anton     679: fill   ( c_addr u c -- )       core
1.52      anton     680: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
1.1       anton     681: memset(c_addr,c,u);
                    682: :
                    683:  -rot bounds
                    684:  ?DO  dup I c!  LOOP  drop ;
                    685: 
1.47      anton     686: compare        ( c_addr1 u1 c_addr2 u2 -- n )  string
1.29      crook     687: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    688: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
1.1       anton     689: is 1. Currently this is based on the machine's character
1.26      crook     690: comparison. In the future, this may change to consider the current
1.1       anton     691: locale and its collation order.""
1.46      pazsan    692: /* close ' to keep fontify happy */ 
1.125     anton     693: n = compare(c_addr1, u1, c_addr2, u2);
1.1       anton     694: :
1.43      pazsan    695:  rot 2dup swap - >r min swap -text dup
                    696:  IF  rdrop  ELSE  drop r> sgn  THEN ;
1.143     pazsan    697: : -text ( c_addr1 u c_addr2 -- n )
                    698:  swap bounds
                    699:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    700:  ELSE  c@ I c@ - unloop  THEN  sgn ;
1.43      pazsan    701: : sgn ( n -- -1/0/1 )
                    702:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     703: 
1.125     anton     704: \ -text is only used by replaced primitives now; move it elsewhere
                    705: \ -text        ( c_addr1 u c_addr2 -- n )      new     dash_text
                    706: \ n = memcmp(c_addr1, c_addr2, u);
                    707: \ if (n<0)
                    708: \   n = -1;
                    709: \ else if (n>0)
                    710: \   n = 1;
                    711: \ :
                    712: \  swap bounds
                    713: \  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    714: \  ELSE  c@ I c@ - unloop  THEN  sgn ;
                    715: \ : sgn ( n -- -1/0/1 )
                    716: \  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     717: 
1.47      anton     718: toupper        ( c1 -- c2 )    gforth
1.29      crook     719: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
1.25      anton     720: is the equivalent upper-case character. All other characters are unchanged.""
1.1       anton     721: c2 = toupper(c1);
                    722: :
                    723:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
                    724: 
1.188     pazsan    725: capscompare    ( c_addr1 u1 c_addr2 u2 -- n )  string
                    726: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    727: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
                    728: is 1. Currently this is based on the machine's character
                    729: comparison. In the future, this may change to consider the current
                    730: locale and its collation order.""
                    731: /* close ' to keep fontify happy */ 
                    732: n = capscompare(c_addr1, u1, c_addr2, u2);
                    733: 
1.47      anton     734: /string        ( c_addr1 u1 n -- c_addr2 u2 )  string  slash_string
1.29      crook     735: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
1.27      crook     736: characters from the start of the string.""
1.1       anton     737: c_addr2 = c_addr1+n;
                    738: u2 = u1-n;
                    739: :
                    740:  tuck - >r + r> dup 0< IF  - 0  THEN ;
                    741: 
1.83      pazsan    742: \g arith
                    743: 
1.112     pazsan    744: lit    ( #w -- w )             gforth
                    745: :
                    746:  r> dup @ swap cell+ >r ;
                    747: 
1.47      anton     748: +      ( n1 n2 -- n )          core    plus
1.1       anton     749: n = n1+n2;
                    750: 
1.112     pazsan    751: \ lit+ / lit_plus = lit +
                    752: 
                    753: lit+   ( n1 #n2 -- n )         new     lit_plus
                    754: n=n1+n2;
                    755: 
1.1       anton     756: \ PFE-0.9.14 has it differently, but the next release will have it as follows
1.47      anton     757: under+ ( n1 n2 n3 -- n n2 )    gforth  under_plus
1.29      crook     758: ""add @i{n3} to @i{n1} (giving @i{n})""
1.1       anton     759: n = n1+n3;
                    760: :
                    761:  rot + swap ;
                    762: 
1.47      anton     763: -      ( n1 n2 -- n )          core    minus
1.1       anton     764: n = n1-n2;
                    765: :
                    766:  negate + ;
                    767: 
1.47      anton     768: negate ( n1 -- n2 )            core
1.1       anton     769: /* use minus as alias */
                    770: n2 = -n1;
                    771: :
                    772:  invert 1+ ;
                    773: 
1.47      anton     774: 1+     ( n1 -- n2 )            core            one_plus
1.1       anton     775: n2 = n1+1;
                    776: :
                    777:  1 + ;
                    778: 
1.47      anton     779: 1-     ( n1 -- n2 )            core            one_minus
1.1       anton     780: n2 = n1-1;
                    781: :
                    782:  1 - ;
                    783: 
1.47      anton     784: max    ( n1 n2 -- n )  core
1.1       anton     785: if (n1<n2)
                    786:   n = n2;
                    787: else
                    788:   n = n1;
                    789: :
                    790:  2dup < IF swap THEN drop ;
                    791: 
1.47      anton     792: min    ( n1 n2 -- n )  core
1.1       anton     793: if (n1<n2)
                    794:   n = n1;
                    795: else
                    796:   n = n2;
                    797: :
                    798:  2dup > IF swap THEN drop ;
                    799: 
1.52      anton     800: abs    ( n -- u )      core
                    801: if (n<0)
                    802:   u = -n;
1.1       anton     803: else
1.52      anton     804:   u = n;
1.1       anton     805: :
                    806:  dup 0< IF negate THEN ;
                    807: 
1.47      anton     808: *      ( n1 n2 -- n )          core    star
1.1       anton     809: n = n1*n2;
                    810: :
                    811:  um* drop ;
                    812: 
1.47      anton     813: /      ( n1 n2 -- n )          core    slash
1.1       anton     814: n = n1/n2;
1.200     anton     815: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     816:   throw(BALL_DIVZERO);
1.200     anton     817: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     818:   throw(BALL_RESULTRANGE);
1.197     anton     819: if (FLOORED_DIV && ((n1^n2) < 0) && (n1%n2 != 0))
                    820:   n--;
1.1       anton     821: :
                    822:  /mod nip ;
                    823: 
1.47      anton     824: mod    ( n1 n2 -- n )          core
1.1       anton     825: n = n1%n2;
1.200     anton     826: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     827:   throw(BALL_DIVZERO);
1.200     anton     828: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     829:   throw(BALL_RESULTRANGE);
1.169     pazsan    830: if(FLOORED_DIV && ((n1^n2) < 0) && n!=0) n += n2;
1.1       anton     831: :
                    832:  /mod drop ;
                    833: 
1.47      anton     834: /mod   ( n1 n2 -- n3 n4 )              core            slash_mod
1.1       anton     835: n4 = n1/n2;
                    836: n3 = n1%n2; /* !! is this correct? look into C standard! */
1.200     anton     837: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     838:   throw(BALL_DIVZERO);
1.200     anton     839: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     840:   throw(BALL_RESULTRANGE);
1.169     pazsan    841: if (FLOORED_DIV && ((n1^n2) < 0) && n3!=0) {
1.162     pazsan    842:   n4--;
                    843:   n3+=n2;
                    844: }
1.1       anton     845: :
                    846:  >r s>d r> fm/mod ;
                    847: 
1.162     pazsan    848: */mod  ( n1 n2 n3 -- n4 n5 )   core    star_slash_mod
                    849: ""n1*n2=n3*n5+n4, with the intermediate result (n1*n2) being double.""
                    850: #ifdef BUGGY_LL_MUL
                    851: DCell d = mmul(n1,n2);
                    852: #else
                    853: DCell d = (DCell)n1 * (DCell)n2;
                    854: #endif
1.202     anton     855: #ifdef ASM_SM_SLASH_REM
                    856: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, n4, n5);
1.207     anton     857: if (FLOORED_DIV && ((DHI(d)^n3)<0) && n4!=0) {
1.202     anton     858:   if (CHECK_DIVISION && n5 == CELL_MIN)
                    859:     throw(BALL_RESULTRANGE);
                    860:   n5--;
                    861:   n4+=n3;
                    862: }
                    863: #else
1.207     anton     864: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.162     pazsan    865: n4=DHI(r);
                    866: n5=DLO(r);
                    867: #endif
                    868: :
                    869:  >r m* r> fm/mod ;
                    870: 
                    871: */     ( n1 n2 n3 -- n4 )      core    star_slash
                    872: ""n4=(n1*n2)/n3, with the intermediate result being double.""
                    873: #ifdef BUGGY_LL_MUL
                    874: DCell d = mmul(n1,n2);
                    875: #else
                    876: DCell d = (DCell)n1 * (DCell)n2;
                    877: #endif
1.202     anton     878: #ifdef ASM_SM_SLASH_REM
                    879: Cell remainder;
                    880: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, remainder, n4);
1.207     anton     881: if (FLOORED_DIV && ((DHI(d)^n3)<0) && remainder!=0) {
1.202     anton     882:   if (CHECK_DIVISION && n4 == CELL_MIN)
                    883:     throw(BALL_RESULTRANGE);
                    884:   n4--;
                    885: }
                    886: #else
1.207     anton     887: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.168     pazsan    888: n4=DLO(r);
1.162     pazsan    889: #endif
                    890: :
                    891:  */mod nip ;
                    892: 
1.47      anton     893: 2*     ( n1 -- n2 )            core            two_star
1.52      anton     894: ""Shift left by 1; also works on unsigned numbers""
1.1       anton     895: n2 = 2*n1;
                    896: :
                    897:  dup + ;
                    898: 
1.47      anton     899: 2/     ( n1 -- n2 )            core            two_slash
1.52      anton     900: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                    901: division by 2 (note that @code{/} not necessarily floors).""
1.1       anton     902: n2 = n1>>1;
                    903: :
                    904:  dup MINI and IF 1 ELSE 0 THEN
1.187     pazsan    905:  [ bits/char cell * 1- ] literal 
1.5       jwilke    906:  0 DO 2* swap dup 2* >r MINI and 
1.1       anton     907:      IF 1 ELSE 0 THEN or r> swap
                    908:  LOOP nip ;
                    909: 
1.47      anton     910: fm/mod ( d1 n1 -- n2 n3 )              core            f_m_slash_mod
1.29      crook     911: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
1.201     anton     912: #ifdef ASM_SM_SLASH_REM
1.203     anton     913: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.169     pazsan    914: if (((DHI(d1)^n1)<0) && n2!=0) {
1.200     anton     915:   if (CHECK_DIVISION && n3 == CELL_MIN)
1.198     anton     916:     throw(BALL_RESULTRANGE);
1.165     anton     917:   n3--;
                    918:   n2+=n1;
                    919: }
1.201     anton     920: #else /* !defined(ASM_SM_SLASH_REM) */
                    921: DCell r = fmdiv(d1,n1);
                    922: n2=DHI(r);
                    923: n3=DLO(r);
1.203     anton     924: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     925: :
                    926:  dup >r dup 0< IF  negate >r dnegate r>  THEN
                    927:  over       0< IF  tuck + swap  THEN
                    928:  um/mod
                    929:  r> 0< IF  swap negate swap  THEN ;
                    930: 
1.47      anton     931: sm/rem ( d1 n1 -- n2 n3 )              core            s_m_slash_rem
1.29      crook     932: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
1.165     anton     933: #ifdef ASM_SM_SLASH_REM
1.203     anton     934: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.165     anton     935: #else /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     936: DCell r = smdiv(d1,n1);
1.162     pazsan    937: n2=DHI(r);
                    938: n3=DLO(r);
1.165     anton     939: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     940: :
                    941:  over >r dup >r abs -rot
                    942:  dabs rot um/mod
                    943:  r> r@ xor 0< IF       negate       THEN
                    944:  r>        0< IF  swap negate swap  THEN ;
                    945: 
1.47      anton     946: m*     ( n1 n2 -- d )          core    m_star
1.158     pazsan    947: #ifdef BUGGY_LL_MUL
1.1       anton     948: d = mmul(n1,n2);
                    949: #else
                    950: d = (DCell)n1 * (DCell)n2;
                    951: #endif
                    952: :
                    953:  2dup      0< and >r
                    954:  2dup swap 0< and >r
                    955:  um* r> - r> - ;
                    956: 
1.47      anton     957: um*    ( u1 u2 -- ud )         core    u_m_star
1.1       anton     958: /* use u* as alias */
1.158     pazsan    959: #ifdef BUGGY_LL_MUL
1.1       anton     960: ud = ummul(u1,u2);
                    961: #else
                    962: ud = (UDCell)u1 * (UDCell)u2;
                    963: #endif
                    964: :
1.137     pazsan    965:    0 -rot dup [ 8 cells ] literal -
1.1       anton     966:    DO
1.137     pazsan    967:        dup 0< I' and d2*+ drop
                    968:    LOOP ;
1.1       anton     969: : d2*+ ( ud n -- ud+n c )
                    970:    over MINI
                    971:    and >r >r 2dup d+ swap r> + swap r> ;
                    972: 
1.47      anton     973: um/mod ( ud u1 -- u2 u3 )              core    u_m_slash_mod
1.32      anton     974: ""ud=u3*u1+u2, u1>u2>=0""
1.165     anton     975: #ifdef ASM_UM_SLASH_MOD
1.203     anton     976: ASM_UM_SLASH_MOD(DLO(ud), DHI(ud), u1, u2, u3);
1.165     anton     977: #else /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     978: UDCell r = umdiv(ud,u1);
1.162     pazsan    979: u2=DHI(r);
                    980: u3=DLO(r);
1.165     anton     981: #endif /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     982: :
                    983:    0 swap [ 8 cells 1 + ] literal 0
1.5       jwilke    984:    ?DO /modstep
1.1       anton     985:    LOOP drop swap 1 rshift or swap ;
                    986: : /modstep ( ud c R: u -- ud-?u c R: u )
1.5       jwilke    987:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
1.1       anton     988: : d2*+ ( ud n -- ud+n c )
                    989:    over MINI
                    990:    and >r >r 2dup d+ swap r> + swap r> ;
                    991: 
1.47      anton     992: m+     ( d1 n -- d2 )          double          m_plus
1.158     pazsan    993: #ifdef BUGGY_LL_ADD
                    994: DLO_IS(d2, DLO(d1)+n);
                    995: DHI_IS(d2, DHI(d1) - (n<0) + (DLO(d2)<DLO(d1)));
1.1       anton     996: #else
                    997: d2 = d1+n;
                    998: #endif
                    999: :
                   1000:  s>d d+ ;
                   1001: 
1.47      anton    1002: d+     ( d1 d2 -- d )          double  d_plus
1.158     pazsan   1003: #ifdef BUGGY_LL_ADD
                   1004: DLO_IS(d, DLO(d1) + DLO(d2));
                   1005: DHI_IS(d, DHI(d1) + DHI(d2) + (d.lo<DLO(d1)));
1.1       anton    1006: #else
                   1007: d = d1+d2;
                   1008: #endif
                   1009: :
                   1010:  rot + >r tuck + swap over u> r> swap - ;
                   1011: 
1.47      anton    1012: d-     ( d1 d2 -- d )          double          d_minus
1.158     pazsan   1013: #ifdef BUGGY_LL_ADD
                   1014: DLO_IS(d, DLO(d1) - DLO(d2));
                   1015: DHI_IS(d, DHI(d1)-DHI(d2)-(DLO(d1)<DLO(d2)));
1.1       anton    1016: #else
                   1017: d = d1-d2;
                   1018: #endif
                   1019: :
                   1020:  dnegate d+ ;
                   1021: 
1.47      anton    1022: dnegate        ( d1 -- d2 )            double  d_negate
1.1       anton    1023: /* use dminus as alias */
1.158     pazsan   1024: #ifdef BUGGY_LL_ADD
1.1       anton    1025: d2 = dnegate(d1);
                   1026: #else
                   1027: d2 = -d1;
                   1028: #endif
                   1029: :
                   1030:  invert swap negate tuck 0= - ;
                   1031: 
1.47      anton    1032: d2*    ( d1 -- d2 )            double          d_two_star
1.52      anton    1033: ""Shift left by 1; also works on unsigned numbers""
1.205     anton    1034: d2 = DLSHIFT(d1,1);
1.1       anton    1035: :
                   1036:  2dup d+ ;
                   1037: 
1.47      anton    1038: d2/    ( d1 -- d2 )            double          d_two_slash
1.52      anton    1039: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                   1040: division by 2.""
1.158     pazsan   1041: #ifdef BUGGY_LL_SHIFT
                   1042: DHI_IS(d2, DHI(d1)>>1);
                   1043: DLO_IS(d2, (DLO(d1)>>1) | (DHI(d1)<<(CELL_BITS-1)));
1.1       anton    1044: #else
                   1045: d2 = d1>>1;
                   1046: #endif
                   1047: :
                   1048:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
                   1049:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
                   1050: 
1.47      anton    1051: and    ( w1 w2 -- w )          core
1.1       anton    1052: w = w1&w2;
                   1053: 
1.47      anton    1054: or     ( w1 w2 -- w )          core
1.1       anton    1055: w = w1|w2;
                   1056: :
                   1057:  invert swap invert and invert ;
                   1058: 
1.47      anton    1059: xor    ( w1 w2 -- w )          core    x_or
1.1       anton    1060: w = w1^w2;
                   1061: 
1.47      anton    1062: invert ( w1 -- w2 )            core
1.1       anton    1063: w2 = ~w1;
                   1064: :
                   1065:  MAXU xor ;
                   1066: 
1.47      anton    1067: rshift ( u1 n -- u2 )          core    r_shift
1.53      anton    1068: ""Logical shift right by @i{n} bits.""
1.154     pazsan   1069: #ifdef BROKEN_SHIFT
                   1070:   u2 = rshift(u1, n);
                   1071: #else
                   1072:   u2 = u1 >> n;
                   1073: #endif
1.1       anton    1074: :
                   1075:     0 ?DO 2/ MAXI and LOOP ;
                   1076: 
1.47      anton    1077: lshift ( u1 n -- u2 )          core    l_shift
1.154     pazsan   1078: #ifdef BROKEN_SHIFT
                   1079:   u2 = lshift(u1, n);
                   1080: #else
                   1081:   u2 = u1 << n;
                   1082: #endif
1.1       anton    1083: :
                   1084:     0 ?DO 2* LOOP ;
                   1085: 
1.110     pazsan   1086: \g compare
                   1087: 
1.1       anton    1088: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1089: define(comparisons,
1.47      anton    1090: $1=    ( $2 -- f )             $6      $3equals
1.1       anton    1091: f = FLAG($4==$5);
                   1092: :
                   1093:     [ char $1x char 0 = [IF]
                   1094:        ] IF false ELSE true THEN [
                   1095:     [ELSE]
                   1096:        ] xor 0= [
                   1097:     [THEN] ] ;
                   1098: 
1.47      anton    1099: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton    1100: f = FLAG($4!=$5);
                   1101: :
                   1102:     [ char $1x char 0 = [IF]
                   1103:        ] IF true ELSE false THEN [
                   1104:     [ELSE]
                   1105:        ] xor 0<> [
                   1106:     [THEN] ] ;
                   1107: 
1.47      anton    1108: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton    1109: f = FLAG($4<$5);
                   1110: :
                   1111:     [ char $1x char 0 = [IF]
                   1112:        ] MINI and 0<> [
                   1113:     [ELSE] char $1x char u = [IF]
                   1114:        ]   2dup xor 0<  IF nip ELSE - THEN 0<  [
                   1115:        [ELSE]
                   1116:            ] MINI xor >r MINI xor r> u< [
                   1117:        [THEN]
                   1118:     [THEN] ] ;
                   1119: 
1.47      anton    1120: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton    1121: f = FLAG($4>$5);
                   1122: :
                   1123:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1124:     $1< ;
                   1125: 
1.47      anton    1126: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton    1127: f = FLAG($4<=$5);
                   1128: :
                   1129:     $1> 0= ;
                   1130: 
1.47      anton    1131: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton    1132: f = FLAG($4>=$5);
                   1133: :
                   1134:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1135:     $1<= ;
                   1136: 
                   1137: )
                   1138: 
                   1139: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
                   1140: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
                   1141: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
                   1142: 
                   1143: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1144: define(dcomparisons,
1.47      anton    1145: $1=    ( $2 -- f )             $6      $3equals
1.158     pazsan   1146: #ifdef BUGGY_LL_CMP
1.1       anton    1147: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
                   1148: #else
                   1149: f = FLAG($4==$5);
                   1150: #endif
                   1151: 
1.47      anton    1152: $1<>   ( $2 -- f )             $7      $3not_equals
1.158     pazsan   1153: #ifdef BUGGY_LL_CMP
1.1       anton    1154: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
                   1155: #else
                   1156: f = FLAG($4!=$5);
                   1157: #endif
                   1158: 
1.47      anton    1159: $1<    ( $2 -- f )             $8      $3less_than
1.158     pazsan   1160: #ifdef BUGGY_LL_CMP
1.1       anton    1161: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
                   1162: #else
                   1163: f = FLAG($4<$5);
                   1164: #endif
                   1165: 
1.47      anton    1166: $1>    ( $2 -- f )             $9      $3greater_than
1.158     pazsan   1167: #ifdef BUGGY_LL_CMP
1.1       anton    1168: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
                   1169: #else
                   1170: f = FLAG($4>$5);
                   1171: #endif
                   1172: 
1.47      anton    1173: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.158     pazsan   1174: #ifdef BUGGY_LL_CMP
1.1       anton    1175: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
                   1176: #else
                   1177: f = FLAG($4<=$5);
                   1178: #endif
                   1179: 
1.47      anton    1180: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.158     pazsan   1181: #ifdef BUGGY_LL_CMP
1.1       anton    1182: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
                   1183: #else
                   1184: f = FLAG($4>=$5);
                   1185: #endif
                   1186: 
                   1187: )
                   1188: 
1.15      pazsan   1189: \+dcomps
1.1       anton    1190: 
                   1191: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
                   1192: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
                   1193: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
                   1194: 
1.15      pazsan   1195: \+
1.1       anton    1196: 
1.47      anton    1197: within ( u1 u2 u3 -- f )               core-ext
1.32      anton    1198: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
                   1199: unsigned and signed numbers (but not a mixture).  Another way to think
                   1200: about this word is to consider the numbers as a circle (wrapping
                   1201: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
                   1202: min-n for signed numbers); now consider the range from u2 towards
                   1203: increasing numbers up to and excluding u3 (giving an empty range if
1.52      anton    1204: u2=u3); if u1 is in this range, @code{within} returns true.""
1.1       anton    1205: f = FLAG(u1-u2 < u3-u2);
                   1206: :
                   1207:  over - >r - r> u< ;
                   1208: 
1.112     pazsan   1209: \g stack
                   1210: 
                   1211: useraddr       ( #u -- a_addr )        new
                   1212: a_addr = (Cell *)(up+u);
                   1213: 
                   1214: up!    ( a_addr -- )   gforth  up_store
1.190     pazsan   1215: gforth_UP=up=(Address)a_addr;
1.112     pazsan   1216: :
                   1217:  up ! ;
                   1218: Variable UP
                   1219: 
1.172     anton    1220: sp@    ( S:... -- a_addr )             gforth          sp_fetch
                   1221: a_addr = sp;
1.1       anton    1222: 
1.172     anton    1223: sp!    ( a_addr -- S:... )             gforth          sp_store
1.1       anton    1224: sp = a_addr;
                   1225: 
1.47      anton    1226: rp@    ( -- a_addr )           gforth          rp_fetch
1.1       anton    1227: a_addr = rp;
                   1228: 
1.47      anton    1229: rp!    ( a_addr -- )           gforth          rp_store
1.1       anton    1230: rp = a_addr;
                   1231: 
1.15      pazsan   1232: \+floating
1.1       anton    1233: 
1.172     anton    1234: fp@    ( f:... -- f_addr )     gforth  fp_fetch
1.1       anton    1235: f_addr = fp;
                   1236: 
1.172     anton    1237: fp!    ( f_addr -- f:... )     gforth  fp_store
1.1       anton    1238: fp = f_addr;
                   1239: 
1.15      pazsan   1240: \+
1.1       anton    1241: 
1.65      anton    1242: >r     ( w -- R:w )            core    to_r
1.1       anton    1243: :
                   1244:  (>r) ;
                   1245: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
                   1246: 
1.65      anton    1247: r>     ( R:w -- w )            core    r_from
1.1       anton    1248: :
                   1249:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
                   1250: Create (rdrop) ' ;s A,
                   1251: 
1.65      anton    1252: rdrop  ( R:w -- )              gforth
1.1       anton    1253: :
                   1254:  r> r> drop >r ;
                   1255: 
1.136     pazsan   1256: 2>r    ( d -- R:d )    core-ext        two_to_r
1.1       anton    1257: :
                   1258:  swap r> swap >r swap >r >r ;
                   1259: 
1.136     pazsan   1260: 2r>    ( R:d -- d )    core-ext        two_r_from
1.1       anton    1261: :
                   1262:  r> r> swap r> swap >r swap ;
                   1263: 
1.136     pazsan   1264: 2r@    ( R:d -- R:d d )        core-ext        two_r_fetch
1.1       anton    1265: :
                   1266:  i' j ;
                   1267: 
1.136     pazsan   1268: 2rdrop ( R:d -- )              gforth  two_r_drop
1.1       anton    1269: :
                   1270:  r> r> drop r> drop >r ;
                   1271: 
1.47      anton    1272: over   ( w1 w2 -- w1 w2 w1 )           core
1.1       anton    1273: :
                   1274:  sp@ cell+ @ ;
                   1275: 
1.47      anton    1276: drop   ( w -- )                core
1.1       anton    1277: :
                   1278:  IF THEN ;
                   1279: 
1.47      anton    1280: swap   ( w1 w2 -- w2 w1 )              core
1.1       anton    1281: :
                   1282:  >r (swap) ! r> (swap) @ ;
                   1283: Variable (swap)
                   1284: 
1.47      anton    1285: dup    ( w -- w w )            core    dupe
1.1       anton    1286: :
                   1287:  sp@ @ ;
                   1288: 
1.47      anton    1289: rot    ( w1 w2 w3 -- w2 w3 w1 )        core    rote
1.1       anton    1290: :
                   1291: [ defined? (swap) [IF] ]
                   1292:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
                   1293: Variable (rot)
                   1294: [ELSE] ]
                   1295:     >r swap r> swap ;
                   1296: [THEN]
                   1297: 
1.47      anton    1298: -rot   ( w1 w2 w3 -- w3 w1 w2 )        gforth  not_rote
1.1       anton    1299: :
                   1300:  rot rot ;
                   1301: 
1.47      anton    1302: nip    ( w1 w2 -- w2 )         core-ext
1.1       anton    1303: :
1.6       jwilke   1304:  swap drop ;
1.1       anton    1305: 
1.47      anton    1306: tuck   ( w1 w2 -- w2 w1 w2 )   core-ext
1.1       anton    1307: :
                   1308:  swap over ;
                   1309: 
1.172     anton    1310: ?dup   ( w -- S:... w )        core    question_dupe
1.52      anton    1311: ""Actually the stack effect is: @code{( w -- 0 | w w )}.  It performs a
                   1312: @code{dup} if w is nonzero.""
1.1       anton    1313: if (w!=0) {
                   1314:   *--sp = w;
                   1315: }
                   1316: :
                   1317:  dup IF dup THEN ;
                   1318: 
1.172     anton    1319: pick   ( S:... u -- S:... w )          core-ext
1.52      anton    1320: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1.172     anton    1321: w = sp[u];
1.1       anton    1322: :
                   1323:  1+ cells sp@ + @ ;
                   1324: 
1.47      anton    1325: 2drop  ( w1 w2 -- )            core    two_drop
1.1       anton    1326: :
                   1327:  drop drop ;
                   1328: 
1.47      anton    1329: 2dup   ( w1 w2 -- w1 w2 w1 w2 )        core    two_dupe
1.1       anton    1330: :
                   1331:  over over ;
                   1332: 
1.47      anton    1333: 2over  ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )    core    two_over
1.1       anton    1334: :
                   1335:  3 pick 3 pick ;
                   1336: 
1.47      anton    1337: 2swap  ( w1 w2 w3 w4 -- w3 w4 w1 w2 )  core    two_swap
1.1       anton    1338: :
                   1339:  rot >r rot r> ;
                   1340: 
1.47      anton    1341: 2rot   ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )      double-ext      two_rote
1.1       anton    1342: :
                   1343:  >r >r 2swap r> r> 2swap ;
                   1344: 
1.47      anton    1345: 2nip   ( w1 w2 w3 w4 -- w3 w4 )        gforth  two_nip
1.1       anton    1346: :
                   1347:  2swap 2drop ;
                   1348: 
1.47      anton    1349: 2tuck  ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )    gforth  two_tuck
1.1       anton    1350: :
                   1351:  2swap 2over ;
                   1352: 
                   1353: \ toggle is high-level: 0.11/0.42%
                   1354: 
1.110     pazsan   1355: \g memory
                   1356: 
1.47      anton    1357: @      ( a_addr -- w )         core    fetch
1.52      anton    1358: ""@i{w} is the cell stored at @i{a_addr}.""
1.1       anton    1359: w = *a_addr;
                   1360: 
1.112     pazsan   1361: \ lit@ / lit_fetch = lit @
                   1362: 
                   1363: lit@           ( #a_addr -- w ) new    lit_fetch
                   1364: w = *a_addr;
                   1365: 
1.47      anton    1366: !      ( w a_addr -- )         core    store
1.52      anton    1367: ""Store @i{w} into the cell at @i{a-addr}.""
1.1       anton    1368: *a_addr = w;
                   1369: 
1.47      anton    1370: +!     ( n a_addr -- )         core    plus_store
1.52      anton    1371: ""Add @i{n} to the cell at @i{a-addr}.""
1.1       anton    1372: *a_addr += n;
                   1373: :
                   1374:  tuck @ + swap ! ;
                   1375: 
1.47      anton    1376: c@     ( c_addr -- c )         core    c_fetch
1.52      anton    1377: ""@i{c} is the char stored at @i{c_addr}.""
1.1       anton    1378: c = *c_addr;
                   1379: :
                   1380: [ bigendian [IF] ]
                   1381:     [ cell>bit 4 = [IF] ]
                   1382:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1383:        IF  $FF and  ELSE  8>>  THEN  ;
                   1384:     [ [ELSE] ]
                   1385:        dup [ cell 1- ] literal and
                   1386:        tuck - @ swap [ cell 1- ] literal xor
                   1387:        0 ?DO 8>> LOOP $FF and
                   1388:     [ [THEN] ]
                   1389: [ [ELSE] ]
                   1390:     [ cell>bit 4 = [IF] ]
                   1391:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1392:        IF  8>>  ELSE  $FF and  THEN
                   1393:     [ [ELSE] ]
                   1394:        dup [ cell  1- ] literal and 
                   1395:        tuck - @ swap
                   1396:        0 ?DO 8>> LOOP 255 and
                   1397:     [ [THEN] ]
                   1398: [ [THEN] ]
                   1399: ;
                   1400: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
                   1401: 
1.47      anton    1402: c!     ( c c_addr -- )         core    c_store
1.52      anton    1403: ""Store @i{c} into the char at @i{c-addr}.""
1.1       anton    1404: *c_addr = c;
                   1405: :
                   1406: [ bigendian [IF] ]
                   1407:     [ cell>bit 4 = [IF] ]
                   1408:        tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
                   1409:        dup -2 and @ over 1 and cells masks + @ and
                   1410:        r> or swap -2 and ! ;
                   1411:        Create masks $00FF , $FF00 ,
                   1412:     [ELSE] ]
                   1413:        dup [ cell 1- ] literal and dup 
                   1414:        [ cell 1- ] literal xor >r
                   1415:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1416:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1417:     [THEN]
                   1418: [ELSE] ]
                   1419:     [ cell>bit 4 = [IF] ]
                   1420:        tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
                   1421:        dup -2 and @ over 1 and cells masks + @ and
                   1422:        r> or swap -2 and ! ;
                   1423:        Create masks $FF00 , $00FF ,
                   1424:     [ELSE] ]
                   1425:        dup [ cell 1- ] literal and dup >r
                   1426:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1427:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1428:     [THEN]
                   1429: [THEN]
                   1430: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
                   1431: 
1.47      anton    1432: 2!     ( w1 w2 a_addr -- )             core    two_store
1.52      anton    1433: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1.1       anton    1434: a_addr[0] = w2;
                   1435: a_addr[1] = w1;
                   1436: :
                   1437:  tuck ! cell+ ! ;
                   1438: 
1.47      anton    1439: 2@     ( a_addr -- w1 w2 )             core    two_fetch
1.52      anton    1440: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
                   1441: the content of the next cell.""
1.1       anton    1442: w2 = a_addr[0];
                   1443: w1 = a_addr[1];
                   1444: :
                   1445:  dup cell+ @ swap @ ;
                   1446: 
1.47      anton    1447: cell+  ( a_addr1 -- a_addr2 )  core    cell_plus
1.52      anton    1448: ""@code{1 cells +}""
1.1       anton    1449: a_addr2 = a_addr1+1;
                   1450: :
                   1451:  cell + ;
                   1452: 
1.47      anton    1453: cells  ( n1 -- n2 )            core
1.52      anton    1454: "" @i{n2} is the number of address units of @i{n1} cells.""
1.1       anton    1455: n2 = n1 * sizeof(Cell);
                   1456: :
                   1457:  [ cell
                   1458:  2/ dup [IF] ] 2* [ [THEN]
                   1459:  2/ dup [IF] ] 2* [ [THEN]
                   1460:  2/ dup [IF] ] 2* [ [THEN]
                   1461:  2/ dup [IF] ] 2* [ [THEN]
                   1462:  drop ] ;
                   1463: 
1.47      anton    1464: char+  ( c_addr1 -- c_addr2 )  core    char_plus
1.52      anton    1465: ""@code{1 chars +}.""
1.1       anton    1466: c_addr2 = c_addr1 + 1;
                   1467: :
                   1468:  1+ ;
                   1469: 
1.47      anton    1470: (chars)        ( n1 -- n2 )    gforth  paren_chars
1.1       anton    1471: n2 = n1 * sizeof(Char);
                   1472: :
                   1473:  ;
                   1474: 
1.47      anton    1475: count  ( c_addr1 -- c_addr2 u )        core
1.56      anton    1476: ""@i{c-addr2} is the first character and @i{u} the length of the
                   1477: counted string at @i{c-addr1}.""
1.1       anton    1478: u = *c_addr1;
                   1479: c_addr2 = c_addr1+1;
                   1480: :
                   1481:  dup 1+ swap c@ ;
                   1482: 
1.110     pazsan   1483: \g compiler
                   1484: 
1.138     pazsan   1485: \+f83headerstring
                   1486: 
                   1487: (f83find)      ( c_addr u f83name1 -- f83name2 )       new     paren_f83find
                   1488: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
                   1489:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1490:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1491:     break;
                   1492: f83name2=f83name1;
1.210   ! pazsan   1493: #ifdef DEBUG
        !          1494: fprintf(stderr, "F83find ");
        !          1495: fwrite(c_addr, u, 1, stderr);
        !          1496: fprintf(stderr, " found %08x\n", f83name2); 
        !          1497: #endif
1.138     pazsan   1498: :
                   1499:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
                   1500:        >r 2dup r@ cell+ char+ capscomp  0=
                   1501:        IF  2drop r>  EXIT  THEN
                   1502:        r> @
                   1503:     REPEAT  THEN  nip nip ;
                   1504: : (find-samelen) ( u f83name1 -- u f83name2/0 )
                   1505:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL  THEN ;
                   1506: : capscomp ( c_addr1 u c_addr2 -- n )
                   1507:  swap bounds
                   1508:  ?DO  dup c@ I c@ <>
                   1509:      IF  dup c@ toupper I c@ toupper =
                   1510:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1511:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1512: : sgn ( n -- -1/0/1 )
                   1513:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                   1514: 
                   1515: \-
                   1516: 
1.112     pazsan   1517: (listlfind)    ( c_addr u longname1 -- longname2 )     new     paren_listlfind
1.125     anton    1518: longname2=listlfind(c_addr, u, longname1);
1.1       anton    1519: :
1.112     pazsan   1520:     BEGIN  dup WHILE  (findl-samelen)  dup  WHILE
                   1521:        >r 2dup r@ cell+ cell+ capscomp  0=
1.1       anton    1522:        IF  2drop r>  EXIT  THEN
                   1523:        r> @
                   1524:     REPEAT  THEN  nip nip ;
1.112     pazsan   1525: : (findl-samelen) ( u longname1 -- u longname2/0 )
                   1526:     BEGIN  2dup cell+ @ lcount-mask and <> WHILE  @  dup 0= UNTIL  THEN ;
1.144     pazsan   1527: : capscomp ( c_addr1 u c_addr2 -- n )
                   1528:  swap bounds
                   1529:  ?DO  dup c@ I c@ <>
                   1530:      IF  dup c@ toupper I c@ toupper =
                   1531:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1532:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1533: : sgn ( n -- -1/0/1 )
                   1534:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1535: 
1.15      pazsan   1536: \+hash
1.1       anton    1537: 
1.112     pazsan   1538: (hashlfind)    ( c_addr u a_addr -- longname2 )        new     paren_hashlfind
1.125     anton    1539: longname2 = hashlfind(c_addr, u, a_addr);
1.1       anton    1540: :
                   1541:  BEGIN  dup  WHILE
1.112     pazsan   1542:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1543:         IF  2dup r@ cell+ cell+ capscomp 0=
1.1       anton    1544:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1545:        rdrop r>
                   1546:  REPEAT nip nip ;
                   1547: 
1.112     pazsan   1548: (tablelfind)   ( c_addr u a_addr -- longname2 )        new     paren_tablelfind
1.1       anton    1549: ""A case-sensitive variant of @code{(hashfind)}""
1.125     anton    1550: longname2 = tablelfind(c_addr, u, a_addr);
1.1       anton    1551: :
                   1552:  BEGIN  dup  WHILE
1.112     pazsan   1553:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1554:         IF  2dup r@ cell+ cell+ -text 0=
1.1       anton    1555:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1556:        rdrop r>
                   1557:  REPEAT nip nip ;
1.138     pazsan   1558: : -text ( c_addr1 u c_addr2 -- n )
                   1559:  swap bounds
                   1560:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                   1561:  ELSE  c@ I c@ - unloop  THEN  sgn ;
                   1562: : sgn ( n -- -1/0/1 )
                   1563:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1564: 
1.47      anton    1565: (hashkey1)     ( c_addr u ubits -- ukey )              gforth  paren_hashkey1
1.1       anton    1566: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
1.125     anton    1567: ukey = hashkey1(c_addr, u, ubits);
1.1       anton    1568: :
                   1569:  dup rot-values + c@ over 1 swap lshift 1- >r
                   1570:  tuck - 2swap r> 0 2swap bounds
                   1571:  ?DO  dup 4 pick lshift swap 3 pick rshift or
                   1572:       I c@ toupper xor
                   1573:       over and  LOOP
                   1574:  nip nip nip ;
                   1575: Create rot-values
                   1576:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
                   1577:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
                   1578:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
                   1579:   7 c, 5 c, 5 c,
1.138     pazsan   1580: 
                   1581: \+
1.1       anton    1582: 
1.15      pazsan   1583: \+
1.1       anton    1584: 
1.47      anton    1585: (parse-white)  ( c_addr1 u1 -- c_addr2 u2 )    gforth  paren_parse_white
1.125     anton    1586: struct Cellpair r=parse_white(c_addr1, u1);
                   1587: c_addr2 = (Char *)(r.n1);
                   1588: u2 = r.n2;
1.1       anton    1589: :
                   1590:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
                   1591:  REPEAT  THEN  2dup
                   1592:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
                   1593:  REPEAT  THEN  nip - ;
                   1594: 
1.47      anton    1595: aligned        ( c_addr -- a_addr )    core
1.29      crook    1596: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1597: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
                   1598: :
                   1599:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                   1600: 
1.47      anton    1601: faligned       ( c_addr -- f_addr )    float   f_aligned
1.29      crook    1602: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1603: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
                   1604: :
                   1605:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
                   1606: 
1.35      jwilke   1607: \ threading stuff is currently only interesting if we have a compiler
                   1608: \fhas? standardthreading has? compiler and [IF]
1.47      anton    1609: threading-method       ( -- n )        gforth  threading_method
1.1       anton    1610: ""0 if the engine is direct threaded. Note that this may change during
                   1611: the lifetime of an image.""
                   1612: #if defined(DOUBLY_INDIRECT)
                   1613: n=2;
                   1614: #else
                   1615: # if defined(DIRECT_THREADED)
                   1616: n=0;
                   1617: # else
                   1618: n=1;
                   1619: # endif
                   1620: #endif
                   1621: :
                   1622:  1 ;
1.28      jwilke   1623: 
1.35      jwilke   1624: \f[THEN]
1.1       anton    1625: 
1.83      pazsan   1626: \g hostos
                   1627: 
1.192     anton    1628: key-file       ( wfileid -- c )                gforth  paren_key_file
1.193     anton    1629: ""Read one character @i{c} from @i{wfileid}.  This word disables
                   1630: buffering for @i{wfileid}.  If you want to read characters from a
                   1631: terminal in non-canonical (raw) mode, you have to put the terminal in
                   1632: non-canonical mode yourself (using the C interface); the exception is
                   1633: @code{stdin}: Gforth automatically puts it into non-canonical mode.""
1.17      pazsan   1634: #ifdef HAS_FILE
1.1       anton    1635: fflush(stdout);
1.192     anton    1636: c = key((FILE*)wfileid);
1.17      pazsan   1637: #else
1.192     anton    1638: c = key(stdin);
1.17      pazsan   1639: #endif
1.1       anton    1640: 
1.192     anton    1641: key?-file      ( wfileid -- f )                gforth  key_q_file
                   1642: ""@i{f} is true if at least one character can be read from @i{wfileid}
1.193     anton    1643: without blocking.  If you also want to use @code{read-file} or
                   1644: @code{read-line} on the file, you have to call @code{key?-file} or
                   1645: @code{key-file} first (these two words disable buffering).""
1.17      pazsan   1646: #ifdef HAS_FILE
1.1       anton    1647: fflush(stdout);
1.192     anton    1648: f = key_query((FILE*)wfileid);
1.17      pazsan   1649: #else
1.192     anton    1650: f = key_query(stdin);
1.17      pazsan   1651: #endif
                   1652: 
1.47      anton    1653: stdin  ( -- wfileid )  gforth
1.193     anton    1654: ""The standard input file of the Gforth process.""
1.12      pazsan   1655: wfileid = (Cell)stdin;
1.1       anton    1656: 
1.47      anton    1657: stdout ( -- wfileid )  gforth
1.193     anton    1658: ""The standard output file of the Gforth process.""
1.1       anton    1659: wfileid = (Cell)stdout;
                   1660: 
1.47      anton    1661: stderr ( -- wfileid )  gforth
1.193     anton    1662: ""The standard error output file of the Gforth process.""
1.1       anton    1663: wfileid = (Cell)stderr;
                   1664: 
1.208     pazsan   1665: \+os
                   1666: 
1.47      anton    1667: form   ( -- urows ucols )      gforth
1.209     anton    1668: ""The number of lines and columns in the terminal. These numbers may
                   1669: change with the window size.  Note that it depends on the OS whether
                   1670: this reflects the actual size and changes with the window size
                   1671: (currently only on Unix-like OSs).  On other OSs you just get a
                   1672: default, and can tell Gforth the terminal size by setting the
                   1673: environment variables @code{COLUMNS} and @code{LINES} before starting
                   1674: Gforth.""
1.1       anton    1675: /* we could block SIGWINCH here to get a consistent size, but I don't
                   1676:  think this is necessary or always beneficial */
                   1677: urows=rows;
                   1678: ucols=cols;
                   1679: 
1.189     pazsan   1680: wcwidth        ( u -- n )      gforth
                   1681: ""The number of fixed-width characters per unicode character u""
                   1682: n = wcwidth(u);
                   1683: 
1.47      anton    1684: flush-icache   ( c_addr u -- ) gforth  flush_icache
1.1       anton    1685: ""Make sure that the instruction cache of the processor (if there is
1.29      crook    1686: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1.1       anton    1687: afterwards. @code{END-CODE} performs a @code{flush-icache}
                   1688: automatically. Caveat: @code{flush-icache} might not work on your
                   1689: installation; this is usually the case if direct threading is not
                   1690: supported on your machine (take a look at your @file{machine.h}) and
                   1691: your machine has a separate instruction cache. In such cases,
                   1692: @code{flush-icache} does nothing instead of flushing the instruction
                   1693: cache.""
                   1694: FLUSH_ICACHE(c_addr,u);
                   1695: 
1.47      anton    1696: (bye)  ( n -- )        gforth  paren_bye
1.77      anton    1697: SUPER_END;
1.1       anton    1698: return (Label *)n;
                   1699: 
1.125     anton    1700: (system)       ( c_addr u -- wretval wior )    gforth  paren_system
1.155     anton    1701: wretval = gforth_system(c_addr, u);  
1.1       anton    1702: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
                   1703: 
1.47      anton    1704: getenv ( c_addr1 u1 -- c_addr2 u2 )    gforth
1.29      crook    1705: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1.24      crook    1706: is the host operating system's expansion of that environment variable. If the
1.29      crook    1707: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1.24      crook    1708: in length.""
1.46      pazsan   1709: /* close ' to keep fontify happy */
1.190     pazsan   1710: c_addr2 = (Char *)getenv(cstr(c_addr1,u1,1));
                   1711: u2 = (c_addr2 == NULL ? 0 : strlen((char *)c_addr2));
1.1       anton    1712: 
1.56      anton    1713: open-pipe      ( c_addr u wfam -- wfileid wior )       gforth  open_pipe
1.84      pazsan   1714: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1.1       anton    1715: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
                   1716: 
1.47      anton    1717: close-pipe     ( wfileid -- wretval wior )             gforth  close_pipe
1.1       anton    1718: wretval = pclose((FILE *)wfileid);
                   1719: wior = IOR(wretval==-1);
                   1720: 
1.47      anton    1721: time&date      ( -- nsec nmin nhour nday nmonth nyear )        facility-ext    time_and_date
1.44      crook    1722: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
                   1723: Months are numbered from 1.""
1.127     anton    1724: #if 1
                   1725: time_t now;
                   1726: struct tm *ltime;
                   1727: time(&now);
                   1728: ltime=localtime(&now);
                   1729: #else
1.1       anton    1730: struct timeval time1;
                   1731: struct timezone zone1;
                   1732: struct tm *ltime;
                   1733: gettimeofday(&time1,&zone1);
1.51      anton    1734: /* !! Single Unix specification: 
                   1735:    If tzp is not a null pointer, the behaviour is unspecified. */
1.1       anton    1736: ltime=localtime((time_t *)&time1.tv_sec);
1.127     anton    1737: #endif
1.1       anton    1738: nyear =ltime->tm_year+1900;
                   1739: nmonth=ltime->tm_mon+1;
                   1740: nday  =ltime->tm_mday;
                   1741: nhour =ltime->tm_hour;
                   1742: nmin  =ltime->tm_min;
                   1743: nsec  =ltime->tm_sec;
                   1744: 
1.47      anton    1745: ms     ( n -- )        facility-ext
1.44      crook    1746: ""Wait at least @i{n} milli-second.""
1.1       anton    1747: struct timeval timeout;
                   1748: timeout.tv_sec=n/1000;
                   1749: timeout.tv_usec=1000*(n%1000);
                   1750: (void)select(0,0,0,0,&timeout);
                   1751: 
1.47      anton    1752: allocate       ( u -- a_addr wior )    memory
1.29      crook    1753: ""Allocate @i{u} address units of contiguous data space. The initial
1.27      crook    1754: contents of the data space is undefined. If the allocation is successful,
1.29      crook    1755: @i{a-addr} is the start address of the allocated region and @i{wior}
                   1756: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1.52      anton    1757: is a non-zero I/O result code.""
1.1       anton    1758: a_addr = (Cell *)malloc(u?u:1);
                   1759: wior = IOR(a_addr==NULL);
                   1760: 
1.47      anton    1761: free   ( a_addr -- wior )              memory
1.29      crook    1762: ""Return the region of data space starting at @i{a-addr} to the system.
1.52      anton    1763: The region must originally have been obtained using @code{allocate} or
1.29      crook    1764: @code{resize}. If the operational is successful, @i{wior} is 0.
1.52      anton    1765: If the operation fails, @i{wior} is a non-zero I/O result code.""
1.1       anton    1766: free(a_addr);
                   1767: wior = 0;
                   1768: 
1.47      anton    1769: resize ( a_addr1 u -- a_addr2 wior )   memory
1.26      crook    1770: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1.1       anton    1771: address units, possibly moving the contents to a different
1.27      crook    1772: area. @i{a-addr2} is the address of the resulting area.
1.52      anton    1773: If the operation is successful, @i{wior} is 0.
                   1774: If the operation fails, @i{wior} is a non-zero
1.29      crook    1775: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1.27      crook    1776: @code{resize} @code{allocate}s @i{u} address units.""
1.1       anton    1777: /* the following check is not necessary on most OSs, but it is needed
                   1778:    on SunOS 4.1.2. */
1.46      pazsan   1779: /* close ' to keep fontify happy */
1.1       anton    1780: if (a_addr1==NULL)
                   1781:   a_addr2 = (Cell *)malloc(u);
                   1782: else
                   1783:   a_addr2 = (Cell *)realloc(a_addr1, u);
                   1784: wior = IOR(a_addr2==NULL);     /* !! Define a return code */
                   1785: 
1.47      anton    1786: strerror       ( n -- c_addr u )       gforth
1.190     pazsan   1787: c_addr = (Char *)strerror(n);
                   1788: u = strlen((char *)c_addr);
1.1       anton    1789: 
1.47      anton    1790: strsignal      ( n -- c_addr u )       gforth
1.190     pazsan   1791: c_addr = (Char *)strsignal(n);
                   1792: u = strlen((char *)c_addr);
1.1       anton    1793: 
1.172     anton    1794: call-c ( ... w -- ... )        gforth  call_c
1.1       anton    1795: ""Call the C function pointed to by @i{w}. The C function has to
                   1796: access the stack itself. The stack pointers are exported in the global
                   1797: variables @code{SP} and @code{FP}.""
                   1798: /* This is a first attempt at support for calls to C. This may change in
                   1799:    the future */
1.185     pazsan   1800: gforth_FP=fp;
                   1801: gforth_SP=sp;
1.1       anton    1802: ((void (*)())w)();
1.185     pazsan   1803: sp=gforth_SP;
                   1804: fp=gforth_FP;
1.1       anton    1805: 
1.15      pazsan   1806: \+
                   1807: \+file
1.1       anton    1808: 
1.47      anton    1809: close-file     ( wfileid -- wior )             file    close_file
1.1       anton    1810: wior = IOR(fclose((FILE *)wfileid)==EOF);
                   1811: 
1.56      anton    1812: open-file      ( c_addr u wfam -- wfileid wior )       file    open_file
                   1813: wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
1.22      crook    1814: wior =  IOR(wfileid == 0);
1.1       anton    1815: 
1.56      anton    1816: create-file    ( c_addr u wfam -- wfileid wior )       file    create_file
1.1       anton    1817: Cell   fd;
1.56      anton    1818: fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[wfam], 0666);
1.1       anton    1819: if (fd != -1) {
1.56      anton    1820:   wfileid = (Cell)fdopen(fd, fileattr[wfam]);
1.22      crook    1821:   wior = IOR(wfileid == 0);
1.1       anton    1822: } else {
1.22      crook    1823:   wfileid = 0;
1.1       anton    1824:   wior = IOR(1);
                   1825: }
                   1826: 
1.47      anton    1827: delete-file    ( c_addr u -- wior )            file    delete_file
1.1       anton    1828: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
                   1829: 
1.47      anton    1830: rename-file    ( c_addr1 u1 c_addr2 u2 -- wior )       file-ext        rename_file
1.29      crook    1831: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1.125     anton    1832: wior = rename_file(c_addr1, u1, c_addr2, u2);
1.1       anton    1833: 
1.47      anton    1834: file-position  ( wfileid -- ud wior )  file    file_position
1.1       anton    1835: /* !! use tell and lseek? */
1.108     anton    1836: ud = OFF2UD(ftello((FILE *)wfileid));
                   1837: wior = IOR(UD2OFF(ud)==-1);
1.1       anton    1838: 
1.47      anton    1839: reposition-file        ( ud wfileid -- wior )  file    reposition_file
1.108     anton    1840: wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1.1       anton    1841: 
1.47      anton    1842: file-size      ( wfileid -- ud wior )  file    file_size
1.1       anton    1843: struct stat buf;
                   1844: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1.108     anton    1845: ud = OFF2UD(buf.st_size);
1.1       anton    1846: 
1.47      anton    1847: resize-file    ( ud wfileid -- wior )  file    resize_file
1.108     anton    1848: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1.1       anton    1849: 
1.47      anton    1850: read-file      ( c_addr u1 wfileid -- u2 wior )        file    read_file
1.1       anton    1851: /* !! fread does not guarantee enough */
                   1852: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1853: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1854: /* !! is the value of ferror errno-compatible? */
                   1855: if (wior)
                   1856:   clearerr((FILE *)wfileid);
                   1857: 
1.125     anton    1858: (read-line)    ( c_addr u1 wfileid -- u2 flag u3 wior ) file   paren_read_line
                   1859: struct Cellquad r = read_line(c_addr, u1, wfileid);
                   1860: u2   = r.n1;
                   1861: flag = r.n2;
                   1862: u3   = r.n3;
                   1863: wior = r.n4;
1.1       anton    1864: 
1.15      pazsan   1865: \+
1.1       anton    1866: 
1.47      anton    1867: write-file     ( c_addr u1 wfileid -- wior )   file    write_file
1.1       anton    1868: /* !! fwrite does not guarantee enough */
1.39      pazsan   1869: #ifdef HAS_FILE
1.1       anton    1870: {
                   1871:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1872:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1873:   if (wior)
                   1874:     clearerr((FILE *)wfileid);
                   1875: }
1.39      pazsan   1876: #else
                   1877: TYPE(c_addr, u1);
                   1878: #endif
1.17      pazsan   1879: 
1.47      anton    1880: emit-file      ( c wfileid -- wior )   gforth  emit_file
1.17      pazsan   1881: #ifdef HAS_FILE
1.1       anton    1882: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
                   1883: if (wior)
                   1884:   clearerr((FILE *)wfileid);
1.17      pazsan   1885: #else
1.36      pazsan   1886: PUTC(c);
1.17      pazsan   1887: #endif
1.1       anton    1888: 
1.15      pazsan   1889: \+file
1.1       anton    1890: 
1.47      anton    1891: flush-file     ( wfileid -- wior )             file-ext        flush_file
1.1       anton    1892: wior = IOR(fflush((FILE *) wfileid)==EOF);
                   1893: 
1.56      anton    1894: file-status    ( c_addr u -- wfam wior )       file-ext        file_status
1.125     anton    1895: struct Cellpair r = file_status(c_addr, u);
                   1896: wfam = r.n1;
                   1897: wior = r.n2;
1.1       anton    1898: 
1.112     pazsan   1899: file-eof?      ( wfileid -- flag )     gforth  file_eof_query
                   1900: flag = FLAG(feof((FILE *) wfileid));
1.1       anton    1901: 
1.112     pazsan   1902: open-dir       ( c_addr u -- wdirid wior )     gforth  open_dir
                   1903: ""Open the directory specified by @i{c-addr, u}
                   1904: and return @i{dir-id} for futher access to it.""
                   1905: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
                   1906: wior =  IOR(wdirid == 0);
                   1907: 
                   1908: read-dir       ( c_addr u1 wdirid -- u2 flag wior )    gforth  read_dir
                   1909: ""Attempt to read the next entry from the directory specified
                   1910: by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}. 
                   1911: If the attempt fails because there is no more entries,
                   1912: @i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
                   1913: If the attempt to read the next entry fails because of any other reason, 
                   1914: return @i{ior}<>0.
                   1915: If the attempt succeeds, store file name to the buffer at @i{c-addr}
                   1916: and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
                   1917: If the length of the file name is greater than @i{u1}, 
                   1918: store first @i{u1} characters from file name into the buffer and
                   1919: indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
                   1920: struct dirent * dent;
                   1921: dent = readdir((DIR *)wdirid);
                   1922: wior = 0;
                   1923: flag = -1;
                   1924: if(dent == NULL) {
                   1925:   u2 = 0;
                   1926:   flag = 0;
                   1927: } else {
1.190     pazsan   1928:   u2 = strlen((char *)dent->d_name);
1.112     pazsan   1929:   if(u2 > u1) {
                   1930:     u2 = u1;
                   1931:     wior = -512-ENAMETOOLONG;
                   1932:   }
                   1933:   memmove(c_addr, dent->d_name, u2);
                   1934: }
                   1935: 
                   1936: close-dir      ( wdirid -- wior )      gforth  close_dir
                   1937: ""Close the directory specified by @i{dir-id}.""
                   1938: wior = IOR(closedir((DIR *)wdirid));
                   1939: 
                   1940: filename-match ( c_addr1 u1 c_addr2 u2 -- flag )       gforth  match_file
                   1941: char * string = cstr(c_addr1, u1, 1);
                   1942: char * pattern = cstr(c_addr2, u2, 0);
                   1943: flag = FLAG(!fnmatch(pattern, string, 0));
                   1944: 
1.157     pazsan   1945: set-dir        ( c_addr u -- wior )    gforth set_dir
                   1946: ""Change the current directory to @i{c-addr, u}.
                   1947: Return an error if this is not possible""
                   1948: wior = IOR(chdir(tilde_cstr(c_addr, u, 1)));
                   1949: 
                   1950: get-dir        ( c_addr1 u1 -- c_addr2 u2 )    gforth get_dir
                   1951: ""Store the current directory in the buffer specified by @{c-addr1, u1}.
                   1952: If the buffer size is not sufficient, return 0 0""
1.190     pazsan   1953: c_addr2 = (Char *)getcwd((char *)c_addr1, u1);
1.157     pazsan   1954: if(c_addr2 != NULL) {
1.190     pazsan   1955:   u2 = strlen((char *)c_addr2);
1.157     pazsan   1956: } else {
                   1957:   u2 = 0;
                   1958: }
                   1959: 
1.112     pazsan   1960: \+
                   1961: 
                   1962: newline        ( -- c_addr u ) gforth
                   1963: ""String containing the newline sequence of the host OS""
                   1964: char newline[] = {
1.115     anton    1965: #if DIRSEP=='/'
                   1966: /* Unix */
1.112     pazsan   1967: '\n'
                   1968: #else
1.115     anton    1969: /* DOS, Win, OS/2 */
1.112     pazsan   1970: '\r','\n'
                   1971: #endif
                   1972: };
1.190     pazsan   1973: c_addr=(Char *)newline;
1.112     pazsan   1974: u=sizeof(newline);
                   1975: :
                   1976:  "newline count ;
                   1977: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
                   1978: 
                   1979: \+os
                   1980: 
                   1981: utime  ( -- dtime )    gforth
                   1982: ""Report the current time in microseconds since some epoch.""
                   1983: struct timeval time1;
                   1984: gettimeofday(&time1,NULL);
                   1985: dtime = timeval2us(&time1);
                   1986: 
                   1987: cputime ( -- duser dsystem ) gforth
                   1988: ""duser and dsystem are the respective user- and system-level CPU
                   1989: times used since the start of the Forth system (excluding child
                   1990: processes), in microseconds (the granularity may be much larger,
                   1991: however).  On platforms without the getrusage call, it reports elapsed
                   1992: time (since some epoch) for duser and 0 for dsystem.""
                   1993: #ifdef HAVE_GETRUSAGE
                   1994: struct rusage usage;
                   1995: getrusage(RUSAGE_SELF, &usage);
                   1996: duser = timeval2us(&usage.ru_utime);
                   1997: dsystem = timeval2us(&usage.ru_stime);
                   1998: #else
                   1999: struct timeval time1;
                   2000: gettimeofday(&time1,NULL);
                   2001: duser = timeval2us(&time1);
1.158     pazsan   2002: dsystem = DZERO;
1.112     pazsan   2003: #endif
                   2004: 
                   2005: \+
                   2006: 
                   2007: \+floating
                   2008: 
                   2009: \g floating
1.83      pazsan   2010: 
1.1       anton    2011: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
                   2012: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
                   2013: 
1.177     pazsan   2014: s>f    ( n -- r )              float   s_to_f
                   2015: r = n;
                   2016: 
1.47      anton    2017: d>f    ( d -- r )              float   d_to_f
1.158     pazsan   2018: #ifdef BUGGY_LL_D2F
1.1       anton    2019: extern double ldexp(double x, int exp);
1.158     pazsan   2020: if (DHI(d)<0) {
                   2021: #ifdef BUGGY_LL_ADD
1.113     anton    2022:   DCell d2=dnegate(d);
1.158     pazsan   2023: #else
                   2024:   DCell d2=-d;
                   2025: #endif
                   2026:   r = -(ldexp((Float)DHI(d2),CELL_BITS) + (Float)DLO(d2));
1.113     anton    2027: } else
1.158     pazsan   2028:   r = ldexp((Float)DHI(d),CELL_BITS) + (Float)DLO(d);
1.1       anton    2029: #else
                   2030: r = d;
                   2031: #endif
                   2032: 
1.47      anton    2033: f>d    ( r -- d )              float   f_to_d
1.100     pazsan   2034: extern DCell double2ll(Float r);
                   2035: d = double2ll(r);
1.1       anton    2036: 
1.177     pazsan   2037: f>s    ( r -- n )              float   f_to_s
                   2038: n = (Cell)r;
                   2039: 
1.47      anton    2040: f!     ( r f_addr -- ) float   f_store
1.52      anton    2041: ""Store @i{r} into the float at address @i{f-addr}.""
1.1       anton    2042: *f_addr = r;
                   2043: 
1.47      anton    2044: f@     ( f_addr -- r ) float   f_fetch
1.52      anton    2045: ""@i{r} is the float at address @i{f-addr}.""
1.1       anton    2046: r = *f_addr;
                   2047: 
1.47      anton    2048: df@    ( df_addr -- r )        float-ext       d_f_fetch
1.52      anton    2049: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1.1       anton    2050: #ifdef IEEE_FP
                   2051: r = *df_addr;
                   2052: #else
                   2053: !! df@
                   2054: #endif
                   2055: 
1.47      anton    2056: df!    ( r df_addr -- )        float-ext       d_f_store
1.52      anton    2057: ""Store @i{r} as double-precision IEEE floating-point value to the
                   2058: address @i{df-addr}.""
1.1       anton    2059: #ifdef IEEE_FP
                   2060: *df_addr = r;
                   2061: #else
                   2062: !! df!
                   2063: #endif
                   2064: 
1.47      anton    2065: sf@    ( sf_addr -- r )        float-ext       s_f_fetch
1.52      anton    2066: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1.1       anton    2067: #ifdef IEEE_FP
                   2068: r = *sf_addr;
                   2069: #else
                   2070: !! sf@
                   2071: #endif
                   2072: 
1.47      anton    2073: sf!    ( r sf_addr -- )        float-ext       s_f_store
1.52      anton    2074: ""Store @i{r} as single-precision IEEE floating-point value to the
                   2075: address @i{sf-addr}.""
1.1       anton    2076: #ifdef IEEE_FP
                   2077: *sf_addr = r;
                   2078: #else
                   2079: !! sf!
                   2080: #endif
                   2081: 
1.47      anton    2082: f+     ( r1 r2 -- r3 ) float   f_plus
1.1       anton    2083: r3 = r1+r2;
                   2084: 
1.47      anton    2085: f-     ( r1 r2 -- r3 ) float   f_minus
1.1       anton    2086: r3 = r1-r2;
                   2087: 
1.47      anton    2088: f*     ( r1 r2 -- r3 ) float   f_star
1.1       anton    2089: r3 = r1*r2;
                   2090: 
1.47      anton    2091: f/     ( r1 r2 -- r3 ) float   f_slash
1.1       anton    2092: r3 = r1/r2;
                   2093: 
1.47      anton    2094: f**    ( r1 r2 -- r3 ) float-ext       f_star_star
1.26      crook    2095: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1.1       anton    2096: r3 = pow(r1,r2);
1.177     pazsan   2097: 
                   2098: fm*    ( r1 n -- r2 )  gforth  fm_star
                   2099: r2 = r1*n;
                   2100: 
                   2101: fm/    ( r1 n -- r2 )  gforth  fm_slash
                   2102: r2 = r1/n;
                   2103: 
                   2104: fm*/   ( r1 n1 n2 -- r2 )      gforth  fm_star_slash
                   2105: r2 = (r1*n1)/n2;
                   2106: 
                   2107: f**2   ( r1 -- r2 )    gforth  fm_square
                   2108: r2 = r1*r1;
1.1       anton    2109: 
1.47      anton    2110: fnegate        ( r1 -- r2 )    float   f_negate
1.1       anton    2111: r2 = - r1;
                   2112: 
1.47      anton    2113: fdrop  ( r -- )                float   f_drop
1.1       anton    2114: 
1.47      anton    2115: fdup   ( r -- r r )    float   f_dupe
1.1       anton    2116: 
1.47      anton    2117: fswap  ( r1 r2 -- r2 r1 )      float   f_swap
1.1       anton    2118: 
1.47      anton    2119: fover  ( r1 r2 -- r1 r2 r1 )   float   f_over
1.1       anton    2120: 
1.47      anton    2121: frot   ( r1 r2 r3 -- r2 r3 r1 )        float   f_rote
1.1       anton    2122: 
1.47      anton    2123: fnip   ( r1 r2 -- r2 ) gforth  f_nip
1.1       anton    2124: 
1.47      anton    2125: ftuck  ( r1 r2 -- r2 r1 r2 )   gforth  f_tuck
1.1       anton    2126: 
1.47      anton    2127: float+ ( f_addr1 -- f_addr2 )  float   float_plus
1.52      anton    2128: ""@code{1 floats +}.""
1.1       anton    2129: f_addr2 = f_addr1+1;
                   2130: 
1.47      anton    2131: floats ( n1 -- n2 )    float
1.52      anton    2132: ""@i{n2} is the number of address units of @i{n1} floats.""
1.1       anton    2133: n2 = n1*sizeof(Float);
                   2134: 
1.47      anton    2135: floor  ( r1 -- r2 )    float
1.26      crook    2136: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1.1       anton    2137: /* !! unclear wording */
                   2138: r2 = floor(r1);
                   2139: 
1.105     anton    2140: fround ( r1 -- r2 )    gforth  f_round
                   2141: ""Round to the nearest integral value.""
1.1       anton    2142: r2 = rint(r1);
                   2143: 
1.47      anton    2144: fmax   ( r1 r2 -- r3 ) float   f_max
1.1       anton    2145: if (r1<r2)
                   2146:   r3 = r2;
                   2147: else
                   2148:   r3 = r1;
                   2149: 
1.47      anton    2150: fmin   ( r1 r2 -- r3 ) float   f_min
1.1       anton    2151: if (r1<r2)
                   2152:   r3 = r1;
                   2153: else
                   2154:   r3 = r2;
                   2155: 
1.47      anton    2156: represent      ( r c_addr u -- n f1 f2 )       float
1.1       anton    2157: char *sig;
1.122     anton    2158: size_t siglen;
1.1       anton    2159: int flag;
                   2160: int decpt;
                   2161: sig=ecvt(r, u, &decpt, &flag);
1.122     anton    2162: n=(r==0. ? 1 : decpt);
1.1       anton    2163: f1=FLAG(flag!=0);
1.21      anton    2164: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1.190     pazsan   2165: siglen=strlen((char *)sig);
1.124     anton    2166: if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
                   2167:   siglen=u;
1.170     anton    2168: if (!f2) /* workaround Cygwin trailing 0s for Inf and Nan */
                   2169:   for (; sig[siglen-1]=='0'; siglen--);
                   2170:     ;
1.122     anton    2171: memcpy(c_addr,sig,siglen);
1.123     anton    2172: memset(c_addr+siglen,f2?'0':' ',u-siglen);
1.1       anton    2173: 
1.172     anton    2174: >float ( c_addr u -- f:... flag )      float   to_float
1.56      anton    2175: ""Actual stack effect: ( c_addr u -- r t | f ).  Attempt to convert the
                   2176: character string @i{c-addr u} to internal floating-point
                   2177: representation. If the string represents a valid floating-point number
                   2178: @i{r} is placed on the floating-point stack and @i{flag} is
                   2179: true. Otherwise, @i{flag} is false. A string of blanks is a special
                   2180: case and represents the floating-point number 0.""
1.1       anton    2181: Float r;
1.125     anton    2182: flag = to_float(c_addr, u, &r);
                   2183: if (flag) {
1.172     anton    2184:   fp--;
                   2185:   fp[0]=r;
1.1       anton    2186: }
                   2187: 
1.47      anton    2188: fabs   ( r1 -- r2 )    float-ext       f_abs
1.1       anton    2189: r2 = fabs(r1);
                   2190: 
1.47      anton    2191: facos  ( r1 -- r2 )    float-ext       f_a_cos
1.1       anton    2192: r2 = acos(r1);
                   2193: 
1.47      anton    2194: fasin  ( r1 -- r2 )    float-ext       f_a_sine
1.1       anton    2195: r2 = asin(r1);
                   2196: 
1.47      anton    2197: fatan  ( r1 -- r2 )    float-ext       f_a_tan
1.1       anton    2198: r2 = atan(r1);
                   2199: 
1.47      anton    2200: fatan2 ( r1 r2 -- r3 ) float-ext       f_a_tan_two
1.26      crook    2201: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1.1       anton    2202: intends this to be the inverse of @code{fsincos}. In gforth it is.""
                   2203: r3 = atan2(r1,r2);
                   2204: 
1.47      anton    2205: fcos   ( r1 -- r2 )    float-ext       f_cos
1.1       anton    2206: r2 = cos(r1);
                   2207: 
1.47      anton    2208: fexp   ( r1 -- r2 )    float-ext       f_e_x_p
1.1       anton    2209: r2 = exp(r1);
                   2210: 
1.47      anton    2211: fexpm1 ( r1 -- r2 )    float-ext       f_e_x_p_m_one
1.1       anton    2212: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
                   2213: #ifdef HAVE_EXPM1
1.3       pazsan   2214: extern double
                   2215: #ifdef NeXT
                   2216:               const
                   2217: #endif
                   2218:                     expm1(double);
1.1       anton    2219: r2 = expm1(r1);
                   2220: #else
                   2221: r2 = exp(r1)-1.;
                   2222: #endif
                   2223: 
1.47      anton    2224: fln    ( r1 -- r2 )    float-ext       f_l_n
1.1       anton    2225: r2 = log(r1);
                   2226: 
1.47      anton    2227: flnp1  ( r1 -- r2 )    float-ext       f_l_n_p_one
1.1       anton    2228: ""@i{r2}=ln(@i{r1}+1)""
                   2229: #ifdef HAVE_LOG1P
1.3       pazsan   2230: extern double
                   2231: #ifdef NeXT
                   2232:               const
                   2233: #endif
                   2234:                     log1p(double);
1.1       anton    2235: r2 = log1p(r1);
                   2236: #else
                   2237: r2 = log(r1+1.);
                   2238: #endif
                   2239: 
1.47      anton    2240: flog   ( r1 -- r2 )    float-ext       f_log
1.26      crook    2241: ""The decimal logarithm.""
1.1       anton    2242: r2 = log10(r1);
                   2243: 
1.47      anton    2244: falog  ( r1 -- r2 )    float-ext       f_a_log
1.1       anton    2245: ""@i{r2}=10**@i{r1}""
                   2246: extern double pow10(double);
                   2247: r2 = pow10(r1);
                   2248: 
1.47      anton    2249: fsin   ( r1 -- r2 )    float-ext       f_sine
1.1       anton    2250: r2 = sin(r1);
                   2251: 
1.47      anton    2252: fsincos        ( r1 -- r2 r3 ) float-ext       f_sine_cos
1.1       anton    2253: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
                   2254: r2 = sin(r1);
                   2255: r3 = cos(r1);
                   2256: 
1.47      anton    2257: fsqrt  ( r1 -- r2 )    float-ext       f_square_root
1.1       anton    2258: r2 = sqrt(r1);
                   2259: 
1.47      anton    2260: ftan   ( r1 -- r2 )    float-ext       f_tan
1.1       anton    2261: r2 = tan(r1);
                   2262: :
                   2263:  fsincos f/ ;
                   2264: 
1.47      anton    2265: fsinh  ( r1 -- r2 )    float-ext       f_cinch
1.1       anton    2266: r2 = sinh(r1);
                   2267: :
                   2268:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
                   2269: 
1.47      anton    2270: fcosh  ( r1 -- r2 )    float-ext       f_cosh
1.1       anton    2271: r2 = cosh(r1);
                   2272: :
                   2273:  fexp fdup 1/f f+ f2/ ;
                   2274: 
1.47      anton    2275: ftanh  ( r1 -- r2 )    float-ext       f_tan_h
1.1       anton    2276: r2 = tanh(r1);
                   2277: :
                   2278:  f2* fexpm1 fdup 2. d>f f+ f/ ;
                   2279: 
1.47      anton    2280: fasinh ( r1 -- r2 )    float-ext       f_a_cinch
1.1       anton    2281: r2 = asinh(r1);
                   2282: :
                   2283:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
                   2284: 
1.47      anton    2285: facosh ( r1 -- r2 )    float-ext       f_a_cosh
1.1       anton    2286: r2 = acosh(r1);
                   2287: :
                   2288:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
                   2289: 
1.47      anton    2290: fatanh ( r1 -- r2 )    float-ext       f_a_tan_h
1.1       anton    2291: r2 = atanh(r1);
                   2292: :
                   2293:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
                   2294:  r> IF  fnegate  THEN ;
                   2295: 
1.47      anton    2296: sfloats        ( n1 -- n2 )    float-ext       s_floats
1.52      anton    2297: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2298: single-precision IEEE floating-point numbers.""
1.1       anton    2299: n2 = n1*sizeof(SFloat);
                   2300: 
1.47      anton    2301: dfloats        ( n1 -- n2 )    float-ext       d_floats
1.52      anton    2302: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2303: double-precision IEEE floating-point numbers.""
1.1       anton    2304: n2 = n1*sizeof(DFloat);
                   2305: 
1.47      anton    2306: sfaligned      ( c_addr -- sf_addr )   float-ext       s_f_aligned
1.52      anton    2307: ""@i{sf-addr} is the first single-float-aligned address greater
1.29      crook    2308: than or equal to @i{c-addr}.""
1.1       anton    2309: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
                   2310: :
                   2311:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
                   2312: 
1.47      anton    2313: dfaligned      ( c_addr -- df_addr )   float-ext       d_f_aligned
1.52      anton    2314: ""@i{df-addr} is the first double-float-aligned address greater
1.29      crook    2315: than or equal to @i{c-addr}.""
1.1       anton    2316: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
                   2317: :
                   2318:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
                   2319: 
1.112     pazsan   2320: v*     ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
                   2321: ""dot-product: r=v1*v2.  The first element of v1 is at f_addr1, the
                   2322: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
                   2323: ucount elements.""
1.125     anton    2324: r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
1.112     pazsan   2325: :
                   2326:  >r swap 2swap swap 0e r> 0 ?DO
                   2327:      dup f@ over + 2swap dup f@ f* f+ over + 2swap
                   2328:  LOOP 2drop 2drop ; 
                   2329: 
                   2330: faxpy  ( ra f_x nstridex f_y nstridey ucount -- )      gforth
                   2331: ""vy=ra*vx+vy""
1.125     anton    2332: faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
1.112     pazsan   2333: :
                   2334:  >r swap 2swap swap r> 0 ?DO
                   2335:      fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
                   2336:  LOOP 2drop 2drop fdrop ;
                   2337: 
                   2338: \+
                   2339: 
1.1       anton    2340: \ The following words access machine/OS/installation-dependent
                   2341: \   Gforth internals
                   2342: \ !! how about environmental queries DIRECT-THREADED,
                   2343: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
                   2344: 
                   2345: \ local variable implementation primitives
1.112     pazsan   2346: 
1.15      pazsan   2347: \+glocals
1.1       anton    2348: 
1.110     pazsan   2349: \g locals
                   2350: 
1.68      anton    2351: @local#        ( #noffset -- w )       gforth  fetch_local_number
                   2352: w = *(Cell *)(lp+noffset);
1.1       anton    2353: 
1.47      anton    2354: @local0        ( -- w )        new     fetch_local_zero
1.112     pazsan   2355: w = ((Cell *)lp)[0];
1.1       anton    2356: 
1.47      anton    2357: @local1        ( -- w )        new     fetch_local_four
1.112     pazsan   2358: w = ((Cell *)lp)[1];
1.1       anton    2359: 
1.47      anton    2360: @local2        ( -- w )        new     fetch_local_eight
1.112     pazsan   2361: w = ((Cell *)lp)[2];
1.1       anton    2362: 
1.47      anton    2363: @local3        ( -- w )        new     fetch_local_twelve
1.112     pazsan   2364: w = ((Cell *)lp)[3];
1.1       anton    2365: 
1.15      pazsan   2366: \+floating
1.1       anton    2367: 
1.68      anton    2368: f@local#       ( #noffset -- r )       gforth  f_fetch_local_number
                   2369: r = *(Float *)(lp+noffset);
1.1       anton    2370: 
1.47      anton    2371: f@local0       ( -- r )        new     f_fetch_local_zero
1.112     pazsan   2372: r = ((Float *)lp)[0];
1.1       anton    2373: 
1.47      anton    2374: f@local1       ( -- r )        new     f_fetch_local_eight
1.112     pazsan   2375: r = ((Float *)lp)[1];
1.1       anton    2376: 
1.15      pazsan   2377: \+
1.1       anton    2378: 
1.68      anton    2379: laddr# ( #noffset -- c_addr )  gforth  laddr_number
1.1       anton    2380: /* this can also be used to implement lp@ */
1.68      anton    2381: c_addr = (Char *)(lp+noffset);
1.1       anton    2382: 
1.68      anton    2383: lp+!#  ( #noffset -- ) gforth  lp_plus_store_number
1.1       anton    2384: ""used with negative immediate values it allocates memory on the
                   2385: local stack, a positive immediate argument drops memory from the local
                   2386: stack""
1.68      anton    2387: lp += noffset;
1.1       anton    2388: 
1.47      anton    2389: lp-    ( -- )  new     minus_four_lp_plus_store
1.1       anton    2390: lp += -sizeof(Cell);
                   2391: 
1.47      anton    2392: lp+    ( -- )  new     eight_lp_plus_store
1.1       anton    2393: lp += sizeof(Float);
                   2394: 
1.47      anton    2395: lp+2   ( -- )  new     sixteen_lp_plus_store
1.1       anton    2396: lp += 2*sizeof(Float);
                   2397: 
1.47      anton    2398: lp!    ( c_addr -- )   gforth  lp_store
1.1       anton    2399: lp = (Address)c_addr;
                   2400: 
1.47      anton    2401: >l     ( w -- )        gforth  to_l
1.1       anton    2402: lp -= sizeof(Cell);
                   2403: *(Cell *)lp = w;
                   2404: 
1.15      pazsan   2405: \+floating
1.1       anton    2406: 
1.47      anton    2407: f>l    ( r -- )        gforth  f_to_l
1.1       anton    2408: lp -= sizeof(Float);
                   2409: *(Float *)lp = r;
                   2410: 
1.172     anton    2411: fpick  ( f:... u -- f:... r )          gforth
1.52      anton    2412: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
1.172     anton    2413: r = fp[u];
1.11      anton    2414: :
                   2415:  floats fp@ + f@ ;
                   2416: 
1.15      pazsan   2417: \+
                   2418: \+
1.1       anton    2419: 
1.15      pazsan   2420: \+OS
1.1       anton    2421: 
1.110     pazsan   2422: \g syslib
                   2423: 
1.131     pazsan   2424: open-lib       ( c_addr1 u1 -- u2 )    gforth  open_lib
                   2425: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2426: #ifndef RTLD_GLOBAL
                   2427: #define RTLD_GLOBAL 0
                   2428: #endif
                   2429: u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL | RTLD_LAZY);
                   2430: #else
                   2431: #  ifdef _WIN32
                   2432: u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
                   2433: #  else
                   2434: #warning Define open-lib!
                   2435: u2 = 0;
                   2436: #  endif
                   2437: #endif
                   2438: 
                   2439: lib-sym        ( c_addr1 u1 u2 -- u3 ) gforth  lib_sym
                   2440: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2441: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
                   2442: #else
                   2443: #  ifdef _WIN32
                   2444: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
                   2445: #  else
                   2446: #warning Define lib-sym!
                   2447: u3 = 0;
                   2448: #  endif
                   2449: #endif
                   2450: 
1.172     anton    2451: wcall  ( ... u -- ... )        gforth
1.185     pazsan   2452: gforth_FP=fp;
                   2453: sp=(Cell*)(SYSCALL(Cell*(*)(Cell *, void *))u)(sp, &gforth_FP);
                   2454: fp=gforth_FP;
1.142     pazsan   2455: 
1.186     anton    2456: uw@ ( c_addr -- u )    gforth u_w_fetch
                   2457: ""@i{u} is the zero-extended 16-bit value stored at @i{c_addr}.""
                   2458: u = *(UWyde*)(c_addr);
1.180     pazsan   2459: 
1.186     anton    2460: sw@ ( c_addr -- n )    gforth s_w_fetch
                   2461: ""@i{n} is the sign-extended 16-bit value stored at @i{c_addr}.""
                   2462: n = *(Wyde*)(c_addr);
1.180     pazsan   2463: 
1.186     anton    2464: w! ( w c_addr -- )     gforth w_store
                   2465: ""Store the bottom 16 bits of @i{w} at @i{c_addr}.""
                   2466: *(Wyde*)(c_addr) = w;
1.180     pazsan   2467: 
1.186     anton    2468: ul@ ( c_addr -- u )    gforth u_l_fetch
                   2469: ""@i{u} is the zero-extended 32-bit value stored at @i{c_addr}.""
                   2470: u = *(UTetrabyte*)(c_addr);
1.181     pazsan   2471: 
1.186     anton    2472: sl@ ( c_addr -- n )    gforth s_l_fetch
                   2473: ""@i{n} is the sign-extended 32-bit value stored at @i{c_addr}.""
                   2474: n = *(Tetrabyte*)(c_addr);
1.181     pazsan   2475: 
1.186     anton    2476: l! ( w c_addr -- )     gforth l_store
                   2477: ""Store the bottom 32 bits of @i{w} at @i{c_addr}.""
                   2478: *(Tetrabyte*)(c_addr) = w;
1.180     pazsan   2479: 
1.131     pazsan   2480: \+FFCALL
                   2481: 
1.136     pazsan   2482: av-start-void  ( c_addr -- )   gforth  av_start_void
1.131     pazsan   2483: av_start_void(alist, c_addr);
                   2484: 
1.136     pazsan   2485: av-start-int   ( c_addr -- )   gforth  av_start_int
1.131     pazsan   2486: av_start_int(alist, c_addr, &irv);
                   2487: 
1.136     pazsan   2488: av-start-float ( c_addr -- )   gforth  av_start_float
1.131     pazsan   2489: av_start_float(alist, c_addr, &frv);
                   2490: 
1.136     pazsan   2491: av-start-double        ( c_addr -- )   gforth  av_start_double
1.131     pazsan   2492: av_start_double(alist, c_addr, &drv);
                   2493: 
1.136     pazsan   2494: av-start-longlong      ( c_addr -- )   gforth  av_start_longlong
1.131     pazsan   2495: av_start_longlong(alist, c_addr, &llrv);
                   2496: 
1.136     pazsan   2497: av-start-ptr   ( c_addr -- )   gforth  av_start_ptr
1.131     pazsan   2498: av_start_ptr(alist, c_addr, void*, &prv);
                   2499: 
                   2500: av-int  ( w -- )  gforth  av_int
                   2501: av_int(alist, w);
                   2502: 
1.136     pazsan   2503: av-float       ( r -- )        gforth  av_float
1.131     pazsan   2504: av_float(alist, r);
                   2505: 
1.136     pazsan   2506: av-double      ( r -- )        gforth  av_double
1.131     pazsan   2507: av_double(alist, r);
                   2508: 
1.136     pazsan   2509: av-longlong    ( d -- )        gforth  av_longlong
1.158     pazsan   2510: #ifdef BUGGY_LL_SIZE
                   2511: av_longlong(alist, DLO(d));
1.151     pazsan   2512: #else
1.131     pazsan   2513: av_longlong(alist, d);
1.151     pazsan   2514: #endif
1.131     pazsan   2515: 
1.136     pazsan   2516: av-ptr ( c_addr -- )   gforth  av_ptr
1.131     pazsan   2517: av_ptr(alist, void*, c_addr);
                   2518: 
1.136     pazsan   2519: av-int-r  ( R:w -- )  gforth  av_int_r
                   2520: av_int(alist, w);
                   2521: 
                   2522: av-float-r     ( -- )  gforth  av_float_r
                   2523: float r = *(Float*)lp;
                   2524: lp += sizeof(Float);
                   2525: av_float(alist, r);
                   2526: 
                   2527: av-double-r    ( -- )  gforth  av_double_r
                   2528: double r = *(Float*)lp;
                   2529: lp += sizeof(Float);
                   2530: av_double(alist, r);
                   2531: 
                   2532: av-longlong-r  ( R:d -- )      gforth  av_longlong_r
1.158     pazsan   2533: #ifdef BUGGY_LL_SIZE
                   2534: av_longlong(alist, DLO(d));
1.151     pazsan   2535: #else
1.136     pazsan   2536: av_longlong(alist, d);
1.151     pazsan   2537: #endif
1.136     pazsan   2538: 
                   2539: av-ptr-r       ( R:c_addr -- ) gforth  av_ptr_r
                   2540: av_ptr(alist, void*, c_addr);
                   2541: 
1.173     anton    2542: av-call-void   ( ... -- ... )  gforth  av_call_void
1.131     pazsan   2543: SAVE_REGS
                   2544: av_call(alist);
                   2545: REST_REGS
                   2546: 
1.173     anton    2547: av-call-int    ( ... -- ... w )        gforth  av_call_int
1.131     pazsan   2548: SAVE_REGS
                   2549: av_call(alist);
1.134     pazsan   2550: REST_REGS
1.131     pazsan   2551: w = irv;
                   2552: 
1.173     anton    2553: av-call-float  ( ... -- ... r )        gforth  av_call_float
1.131     pazsan   2554: SAVE_REGS
                   2555: av_call(alist);
                   2556: REST_REGS
                   2557: r = frv;
                   2558: 
1.173     anton    2559: av-call-double ( ... -- ... r )        gforth  av_call_double
1.131     pazsan   2560: SAVE_REGS
                   2561: av_call(alist);
                   2562: REST_REGS
                   2563: r = drv;
                   2564: 
1.173     anton    2565: av-call-longlong       ( ... -- ... d )        gforth  av_call_longlong
1.131     pazsan   2566: SAVE_REGS
                   2567: av_call(alist);
                   2568: REST_REGS
1.151     pazsan   2569: #ifdef BUGGY_LONG_LONG
1.158     pazsan   2570: DLO_IS(d, llrv);
                   2571: DHI_IS(d, 0);
1.152     pazsan   2572: #else
                   2573: d = llrv;
1.151     pazsan   2574: #endif
1.131     pazsan   2575: 
1.173     anton    2576: av-call-ptr    ( ... -- ... c_addr )   gforth  av_call_ptr
1.131     pazsan   2577: SAVE_REGS
                   2578: av_call(alist);
                   2579: REST_REGS
                   2580: c_addr = prv;
                   2581: 
1.135     pazsan   2582: alloc-callback ( a_ip -- c_addr )      gforth  alloc_callback
1.185     pazsan   2583: c_addr = (char *)alloc_callback(gforth_callback, (Xt *)a_ip);
1.131     pazsan   2584: 
1.135     pazsan   2585: va-start-void  ( -- )  gforth  va_start_void
1.191     pazsan   2586: va_start_void(gforth_clist);
1.131     pazsan   2587: 
1.135     pazsan   2588: va-start-int   ( -- )  gforth  va_start_int
1.191     pazsan   2589: va_start_int(gforth_clist);
1.131     pazsan   2590: 
1.135     pazsan   2591: va-start-longlong      ( -- )  gforth  va_start_longlong
1.191     pazsan   2592: va_start_longlong(gforth_clist);
1.131     pazsan   2593: 
1.135     pazsan   2594: va-start-ptr   ( -- )  gforth  va_start_ptr
1.191     pazsan   2595: va_start_ptr(gforth_clist, (char *));
1.131     pazsan   2596: 
1.135     pazsan   2597: va-start-float ( -- )  gforth  va_start_float
1.191     pazsan   2598: va_start_float(gforth_clist);
1.135     pazsan   2599: 
                   2600: va-start-double        ( -- )  gforth  va_start_double
1.191     pazsan   2601: va_start_double(gforth_clist);
1.135     pazsan   2602: 
                   2603: va-arg-int     ( -- w )        gforth  va_arg_int
1.191     pazsan   2604: w = va_arg_int(gforth_clist);
1.135     pazsan   2605: 
                   2606: va-arg-longlong        ( -- d )        gforth  va_arg_longlong
1.151     pazsan   2607: #ifdef BUGGY_LONG_LONG
1.191     pazsan   2608: DLO_IS(d, va_arg_longlong(gforth_clist));
1.158     pazsan   2609: DHI_IS(d, 0);
1.151     pazsan   2610: #else
1.191     pazsan   2611: d = va_arg_longlong(gforth_clist);
1.151     pazsan   2612: #endif
1.135     pazsan   2613: 
                   2614: va-arg-ptr     ( -- c_addr )   gforth  va_arg_ptr
1.191     pazsan   2615: c_addr = (char *)va_arg_ptr(gforth_clist,char*);
1.135     pazsan   2616: 
                   2617: va-arg-float   ( -- r )        gforth  va_arg_float
1.191     pazsan   2618: r = va_arg_float(gforth_clist);
1.135     pazsan   2619: 
                   2620: va-arg-double  ( -- r )        gforth  va_arg_double
1.191     pazsan   2621: r = va_arg_double(gforth_clist);
1.131     pazsan   2622: 
                   2623: va-return-void ( -- )  gforth va_return_void
1.191     pazsan   2624: va_return_void(gforth_clist);
1.131     pazsan   2625: return 0;
                   2626: 
                   2627: va-return-int ( w -- ) gforth va_return_int
1.191     pazsan   2628: va_return_int(gforth_clist, w);
1.131     pazsan   2629: return 0;
                   2630: 
                   2631: va-return-ptr ( c_addr -- )    gforth va_return_ptr
1.191     pazsan   2632: va_return_ptr(gforth_clist, void *, c_addr);
1.131     pazsan   2633: return 0;
                   2634: 
                   2635: va-return-longlong ( d -- )    gforth va_return_longlong
1.151     pazsan   2636: #ifdef BUGGY_LONG_LONG
1.191     pazsan   2637: va_return_longlong(gforth_clist, d.lo);
1.151     pazsan   2638: #else
1.191     pazsan   2639: va_return_longlong(gforth_clist, d);
1.151     pazsan   2640: #endif
1.131     pazsan   2641: return 0;
                   2642: 
                   2643: va-return-float ( r -- )       gforth va_return_float
1.191     pazsan   2644: va_return_float(gforth_clist, r);
1.131     pazsan   2645: return 0;
                   2646: 
                   2647: va-return-double ( r -- )      gforth va_return_double
1.191     pazsan   2648: va_return_double(gforth_clist, r);
1.131     pazsan   2649: return 0;
                   2650: 
1.142     pazsan   2651: \+
                   2652: 
1.175     pazsan   2653: \+LIBFFI
                   2654: 
                   2655: ffi-type ( n -- a_type )       gforth ffi_type
                   2656: static void* ffi_types[] =
                   2657:     { &ffi_type_void,
                   2658:       &ffi_type_uint8, &ffi_type_sint8,
                   2659:       &ffi_type_uint16, &ffi_type_sint16,
                   2660:       &ffi_type_uint32, &ffi_type_sint32,
                   2661:       &ffi_type_uint64, &ffi_type_sint64,
                   2662:       &ffi_type_float, &ffi_type_double, &ffi_type_longdouble,
                   2663:       &ffi_type_pointer };
                   2664: a_type = ffi_types[n];
                   2665: 
                   2666: ffi-size ( n1 -- n2 )  gforth ffi_size
                   2667: static int ffi_sizes[] =
                   2668:     { sizeof(ffi_cif), sizeof(ffi_closure) };
                   2669: n2 = ffi_sizes[n1];
                   2670: 
                   2671: ffi-prep-cif ( a_atypes n a_rtype a_cif -- w ) gforth ffi_prep_cif
1.190     pazsan   2672: w = ffi_prep_cif((ffi_cif *)a_cif, FFI_DEFAULT_ABI, n,
                   2673:         (ffi_type *)a_rtype, (ffi_type **)a_atypes);
1.175     pazsan   2674: 
                   2675: ffi-call ( a_avalues a_rvalue a_ip a_cif -- )  gforth ffi_call
1.183     pazsan   2676: SAVE_REGS
1.190     pazsan   2677: ffi_call((ffi_cif *)a_cif, (void(*)())a_ip, (void *)a_rvalue, (void **)a_avalues);
1.183     pazsan   2678: REST_REGS
1.175     pazsan   2679: 
                   2680: ffi-prep-closure ( a_ip a_cif a_closure -- w ) gforth ffi_prep_closure
1.190     pazsan   2681: w = ffi_prep_closure((ffi_closure *)a_closure, (ffi_cif *)a_cif, gforth_callback, (void *)a_ip);
1.178     pazsan   2682: 
1.175     pazsan   2683: ffi-2@ ( a_addr -- d ) gforth ffi_2fetch
                   2684: #ifdef BUGGY_LONG_LONG
1.195     pazsan   2685: DLO_IS(d, *(Cell*)(*a_addr));
1.175     pazsan   2686: DHI_IS(d, 0);
                   2687: #else
1.179     pazsan   2688: d = *(DCell*)(a_addr);
1.175     pazsan   2689: #endif
                   2690: 
                   2691: ffi-2! ( d a_addr -- ) gforth ffi_2store
                   2692: #ifdef BUGGY_LONG_LONG
                   2693: *(Cell*)(a_addr) = DLO(d);
                   2694: #else
                   2695: *(DCell*)(a_addr) = d;
                   2696: #endif
                   2697: 
                   2698: ffi-arg-int ( -- w )   gforth ffi_arg_int
1.191     pazsan   2699: w = *(int *)(*gforth_clist++);
1.175     pazsan   2700: 
1.194     pazsan   2701: ffi-arg-long ( -- w )  gforth ffi_arg_long
                   2702: w = *(long *)(*gforth_clist++);
                   2703: 
1.175     pazsan   2704: ffi-arg-longlong ( -- d )      gforth ffi_arg_longlong
                   2705: #ifdef BUGGY_LONG_LONG
1.195     pazsan   2706: DLO_IS(d, *(Cell*)(*gforth_clist++));
                   2707: DHI_IS(d, -(*(Cell*)(*gforth_clist++)<0));
1.175     pazsan   2708: #else
1.191     pazsan   2709: d = *(DCell*)(*gforth_clist++);
1.175     pazsan   2710: #endif
                   2711: 
1.194     pazsan   2712: ffi-arg-dlong ( -- d ) gforth ffi_arg_dlong
                   2713: #ifdef BUGGY_LONG_LONG
1.195     pazsan   2714: DLO_IS(d, *(Cell*)(*gforth_clist++));
                   2715: DHI_IS(d, -(*(Cell*)(*gforth_clist++)<0));
1.194     pazsan   2716: #else
                   2717: d = *(Cell*)(*gforth_clist++);
                   2718: #endif
                   2719: 
1.175     pazsan   2720: ffi-arg-ptr ( -- c_addr )      gforth ffi_arg_ptr
1.191     pazsan   2721: c_addr = *(Char **)(*gforth_clist++);
1.175     pazsan   2722: 
                   2723: ffi-arg-float ( -- r ) gforth ffi_arg_float
1.191     pazsan   2724: r = *(float*)(*gforth_clist++);
1.175     pazsan   2725: 
                   2726: ffi-arg-double ( -- r )        gforth ffi_arg_double
1.191     pazsan   2727: r = *(double*)(*gforth_clist++);
1.175     pazsan   2728: 
1.178     pazsan   2729: ffi-ret-void ( -- )    gforth ffi_ret_void
                   2730: return 0;
                   2731: 
                   2732: ffi-ret-int ( w -- )   gforth ffi_ret_int
1.191     pazsan   2733: *(int*)(gforth_ritem) = w;
1.178     pazsan   2734: return 0;
1.175     pazsan   2735: 
1.178     pazsan   2736: ffi-ret-longlong ( d -- )      gforth ffi_ret_longlong
1.175     pazsan   2737: #ifdef BUGGY_LONG_LONG
1.191     pazsan   2738: *(Cell*)(gforth_ritem) = DLO(d);
1.175     pazsan   2739: #else
1.191     pazsan   2740: *(DCell*)(gforth_ritem) = d;
1.194     pazsan   2741: #endif
                   2742: return 0;
                   2743: 
                   2744: ffi-ret-dlong ( d -- ) gforth ffi_ret_dlong
                   2745: #ifdef BUGGY_LONG_LONG
                   2746: *(Cell*)(gforth_ritem) = DLO(d);
                   2747: #else
                   2748: *(Cell*)(gforth_ritem) = d;
                   2749: #endif
                   2750: return 0;
                   2751: 
                   2752: ffi-ret-long ( n -- )  gforth ffi_ret_long
                   2753: *(Cell*)(gforth_ritem) = n;
1.178     pazsan   2754: return 0;
1.175     pazsan   2755: 
1.178     pazsan   2756: ffi-ret-ptr ( c_addr -- )      gforth ffi_ret_ptr
1.191     pazsan   2757: *(Char **)(gforth_ritem) = c_addr;
1.178     pazsan   2758: return 0;
1.175     pazsan   2759: 
1.178     pazsan   2760: ffi-ret-float ( r -- ) gforth ffi_ret_float
1.191     pazsan   2761: *(float*)(gforth_ritem) = r;
1.178     pazsan   2762: return 0;
1.175     pazsan   2763: 
1.178     pazsan   2764: ffi-ret-double ( r -- )        gforth ffi_ret_double
1.191     pazsan   2765: *(double*)(gforth_ritem) = r;
1.178     pazsan   2766: return 0;
1.175     pazsan   2767: 
                   2768: \+
                   2769: 
1.142     pazsan   2770: \+OLDCALL
1.131     pazsan   2771: 
1.1       anton    2772: define(`uploop',
                   2773:        `pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
                   2774: define(`_uploop',
                   2775:        `ifelse($1, `$3', `$5',
                   2776:               `$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
1.206     anton    2777: 
1.1       anton    2778: \ argflist(argnum): Forth argument list
                   2779: define(argflist,
                   2780:        `ifelse($1, 0, `',
1.206     anton    2781:                `uploop(`_i', 1, $1, ``u''`_i ', ``u''`_i')')')
1.1       anton    2782: \ argdlist(argnum): declare C's arguments
                   2783: define(argdlist,
                   2784:        `ifelse($1, 0, `',
                   2785:                `uploop(`_i', 1, $1, `Cell, ', `Cell')')')
                   2786: \ argclist(argnum): pass C's arguments
                   2787: define(argclist,
                   2788:        `ifelse($1, 0, `',
1.206     anton    2789:                `uploop(`_i', 1, $1, ``u''`_i, ', ``u''`_i')')')
1.1       anton    2790: \ icall(argnum)
                   2791: define(icall,
1.206     anton    2792: `icall$1       ( argflist($1) u -- uret )      gforth
1.9       pazsan   2793: uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2794: 
                   2795: ')
                   2796: define(fcall,
1.206     anton    2797: `fcall$1       ( argflist($1) u -- rret )      gforth
1.9       pazsan   2798: rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2799: 
                   2800: ')
                   2801: 
1.46      pazsan   2802: \ close ' to keep fontify happy
1.1       anton    2803: 
                   2804: uploop(i, 0, 7, `icall(i)')
                   2805: icall(20)
                   2806: uploop(i, 0, 7, `fcall(i)')
                   2807: fcall(20)
                   2808: 
1.15      pazsan   2809: \+
1.131     pazsan   2810: \+
1.1       anton    2811: 
1.142     pazsan   2812: \g peephole
1.46      pazsan   2813: 
1.112     pazsan   2814: \+peephole
                   2815: 
1.119     anton    2816: compile-prim1 ( a_prim -- ) gforth compile_prim1
                   2817: ""compile prim (incl. immargs) at @var{a_prim}""
                   2818: compile_prim1(a_prim);
                   2819: 
1.172     anton    2820: finish-code ( ... -- ... ) gforth finish_code
1.119     anton    2821: ""Perform delayed steps in code generation (branch resolution, I-cache
                   2822: flushing).""
1.172     anton    2823: /* The ... above are a workaround for a bug in gcc-2.95, which fails
                   2824:    to save spTOS (gforth-fast --enable-force-reg) */
1.119     anton    2825: finish_code();
                   2826: 
                   2827: forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
                   2828: f = forget_dyncode(c_code);
                   2829: 
                   2830: decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
                   2831: ""a_prim is the code address of the primitive that has been
                   2832: compile_prim1ed to a_code""
1.121     anton    2833: a_prim = (Cell *)decompile_code((Label)a_code);
1.119     anton    2834: 
1.112     pazsan   2835: \ set-next-code and call2 do not appear in images and can be
                   2836: \ renumbered arbitrarily
1.46      pazsan   2837: 
1.112     pazsan   2838: set-next-code ( #w -- ) gforth set_next_code
                   2839: #ifdef NO_IP
                   2840: next_code = (Label)w;
                   2841: #endif
1.34      jwilke   2842: 
1.112     pazsan   2843: call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
                   2844: /* call with explicit return address */
                   2845: #ifdef NO_IP
                   2846: INST_TAIL;
                   2847: JUMP(a_callee);
1.45      anton    2848: #else
1.112     pazsan   2849: assert(0);
1.45      anton    2850: #endif
1.131     pazsan   2851: 
                   2852: tag-offsets ( -- a_addr ) gforth tag_offsets
                   2853: extern Cell groups[32];
                   2854: a_addr = groups;
1.51      anton    2855: 
1.54      pazsan   2856: \+
1.128     anton    2857: 
                   2858: \g static_super
                   2859: 
1.173     anton    2860: ifdef(`STACK_CACHE_FILE',
1.147     anton    2861: `include(peeprules.vmg)')
1.54      pazsan   2862: 
1.112     pazsan   2863: \g end

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