Annotation of gforth/prim, revision 1.237

1.1       anton       1: \ Gforth primitives
                      2: 
1.230     anton       3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006,2007,2008 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
1.222     anton       9: \ as published by the Free Software Foundation, either version 3
1.1       anton      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
1.222     anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1       anton      19: 
                     20: 
                     21: \ WARNING: This file is processed by m4. Make sure your identifiers
                     22: \ don't collide with m4's (e.g. by undefining them).
                     23: \ 
                     24: \ 
                     25: \ 
                     26: \ This file contains primitive specifications in the following format:
                     27: \ 
1.47      anton      28: \ forth name   ( stack effect )        category        [pronunciation]
1.1       anton      29: \ [""glossary entry""]
                     30: \ C code
                     31: \ [:
                     32: \ Forth code]
                     33: \ 
1.47      anton      34: \ Note: Fields in brackets are optional.  Word specifications have to
                     35: \ be separated by at least one empty line
1.1       anton      36: \
                     37: \ Both pronounciation and stack items (in the stack effect) must
1.48      anton      38: \ conform to the C identifier syntax or the C compiler will complain.
                     39: \ If you don't have a pronounciation field, the Forth name is used,
                     40: \ and has to conform to the C identifier syntax.
1.1       anton      41: \ 
                     42: \ These specifications are automatically translated into C-code for the
                     43: \ interpreter and into some other files. I hope that your C compiler has
                     44: \ decent optimization, otherwise the automatically generated code will
                     45: \ be somewhat slow. The Forth version of the code is included for manual
                     46: \ compilers, so they will need to compile only the important words.
                     47: \ 
                     48: \ Note that stack pointer adjustment is performed according to stack
                     49: \ effect by automatically generated code and NEXT is automatically
                     50: \ appended to the C code. Also, you can use the names in the stack
                     51: \ effect in the C code. Stack access is automatic. One exception: if
                     52: \ your code does not fall through, the results are not stored into the
                     53: \ stack. Use different names on both sides of the '--', if you change a
                     54: \ value (some stores to the stack are optimized away).
1.93      anton      55: \
                     56: \ For superinstructions the syntax is:
                     57: \
                     58: \ forth-name [/ c-name] = forth-name forth-name ...
                     59: \
1.1       anton      60: \ 
                     61: \ The stack variables have the following types:
                     62: \ 
                     63: \ name matches type
                     64: \ f.*          Bool
                     65: \ c.*          Char
1.93      anton      66: \ [nw].*       Cell
1.1       anton      67: \ u.*          UCell
                     68: \ d.*          DCell
                     69: \ ud.*         UDCell
                     70: \ r.*          Float
                     71: \ a_.*         Cell *
                     72: \ c_.*         Char *
                     73: \ f_.*         Float *
                     74: \ df_.*                DFloat *
                     75: \ sf_.*                SFloat *
                     76: \ xt.*         XT
                     77: \ f83name.*    F83Name *
1.67      anton      78: 
1.79      anton      79: \E stack data-stack   sp Cell
                     80: \E stack fp-stack     fp Float
                     81: \E stack return-stack rp Cell
                     82: \E
1.67      anton      83: \E get-current prefixes set-current
                     84: \E 
                     85: \E s" Bool"            single data-stack type-prefix f
                     86: \E s" Char"            single data-stack type-prefix c
                     87: \E s" Cell"            single data-stack type-prefix n
                     88: \E s" Cell"            single data-stack type-prefix w
                     89: \E s" UCell"           single data-stack type-prefix u
                     90: \E s" DCell"           double data-stack type-prefix d
                     91: \E s" UDCell"          double data-stack type-prefix ud
                     92: \E s" Float"           single fp-stack   type-prefix r
                     93: \E s" Cell *"          single data-stack type-prefix a_
                     94: \E s" Char *"          single data-stack type-prefix c_
                     95: \E s" Float *"         single data-stack type-prefix f_
                     96: \E s" DFloat *"                single data-stack type-prefix df_
                     97: \E s" SFloat *"                single data-stack type-prefix sf_
                     98: \E s" Xt"              single data-stack type-prefix xt
                     99: \E s" struct F83Name *"        single data-stack type-prefix f83name
1.71      anton     100: \E s" struct Longname *" single data-stack type-prefix longname
1.67      anton     101: \E 
1.172     anton     102: \E data-stack   stack-prefix S:
                    103: \E fp-stack     stack-prefix F:
1.67      anton     104: \E return-stack stack-prefix R:
                    105: \E inst-stream  stack-prefix #
                    106: \E 
                    107: \E set-current
1.97      anton     108: \E store-optimization on
1.109     anton     109: \E ' noop tail-nextp2 ! \ now INST_TAIL just stores, but does not jump
1.128     anton     110: \E
1.218     anton     111: \E `include-skipped-insts' on \ static superinsts include cells for components
                    112: \E                            \ useful for dynamic programming and
                    113: \E                            \ superinsts across entry points
1.67      anton     114: 
1.1       anton     115: \ 
                    116: \ 
                    117: \ 
                    118: \ In addition the following names can be used:
                    119: \ ip   the instruction pointer
                    120: \ sp   the data stack pointer
                    121: \ rp   the parameter stack pointer
                    122: \ lp   the locals stack pointer
                    123: \ NEXT executes NEXT
                    124: \ cfa  
                    125: \ NEXT1        executes NEXT1
                    126: \ FLAG(x)      makes a Forth flag from a C flag
                    127: \ 
                    128: \ 
                    129: \ 
                    130: \ Percentages in comments are from Koopmans book: average/maximum use
                    131: \ (taken from four, not very representative benchmarks)
                    132: \ 
                    133: \ 
                    134: \ 
                    135: \ To do:
                    136: \ 
                    137: \ throw execute, cfa and NEXT1 out?
                    138: \ macroize *ip, ip++, *ip++ (pipelining)?
                    139: 
1.145     anton     140: \ Stack caching setup
                    141: 
1.173     anton     142: ifdef(`STACK_CACHE_FILE', `include(STACK_CACHE_FILE)', `include(cache0.vmg)')
1.145     anton     143: 
1.1       anton     144: \ these m4 macros would collide with identifiers
                    145: undefine(`index')
                    146: undefine(`shift')
1.78      pazsan    147: undefine(`symbols')
1.1       anton     148: 
1.140     anton     149: \F 0 [if]
                    150: 
1.139     anton     151: \ run-time routines for non-primitives.  They are defined as
                    152: \ primitives, because that simplifies things.
                    153: 
                    154: (docol)        ( -- R:a_retaddr )      gforth-internal paren_docol
                    155: ""run-time routine for colon definitions""
1.148     anton     156: #ifdef NO_IP
                    157: a_retaddr = next_code;
                    158: INST_TAIL;
                    159: goto **(Label *)PFA(CFA);
                    160: #else /* !defined(NO_IP) */
1.141     anton     161: a_retaddr = (Cell *)IP;
1.139     anton     162: SET_IP((Xt *)PFA(CFA));
1.148     anton     163: #endif /* !defined(NO_IP) */
1.139     anton     164: 
                    165: (docon) ( -- w )       gforth-internal paren_docon
                    166: ""run-time routine for constants""
                    167: w = *(Cell *)PFA(CFA);
1.148     anton     168: #ifdef NO_IP
                    169: INST_TAIL;
                    170: goto *next_code;
                    171: #endif /* defined(NO_IP) */
1.139     anton     172: 
                    173: (dovar) ( -- a_body )  gforth-internal paren_dovar
                    174: ""run-time routine for variables and CREATEd words""
                    175: a_body = PFA(CFA);
1.148     anton     176: #ifdef NO_IP
                    177: INST_TAIL;
                    178: goto *next_code;
                    179: #endif /* defined(NO_IP) */
1.139     anton     180: 
                    181: (douser) ( -- a_user ) gforth-internal paren_douser
                    182: ""run-time routine for constants""
                    183: a_user = (Cell *)(up+*(Cell *)PFA(CFA));
1.148     anton     184: #ifdef NO_IP
                    185: INST_TAIL;
                    186: goto *next_code;
                    187: #endif /* defined(NO_IP) */
1.139     anton     188: 
                    189: (dodefer) ( -- )       gforth-internal paren_dodefer
                    190: ""run-time routine for deferred words""
1.148     anton     191: #ifndef NO_IP
1.141     anton     192: ip=IP; /* undo any ip updating that may have been performed by NEXT_P0 */
1.148     anton     193: #endif /* !defined(NO_IP) */
1.141     anton     194: SUPER_END; /* !! probably unnecessary and may lead to measurement errors */
1.161     anton     195: VM_JUMP(EXEC1(*(Xt *)PFA(CFA)));
1.139     anton     196: 
                    197: (dofield) ( n1 -- n2 ) gforth-internal paren_field
                    198: ""run-time routine for fields""
                    199: n2 = n1 + *(Cell *)PFA(CFA);
1.148     anton     200: #ifdef NO_IP
                    201: INST_TAIL;
                    202: goto *next_code;
                    203: #endif /* defined(NO_IP) */
1.139     anton     204: 
1.219     pazsan    205: (dovalue) ( -- w )     gforth-internal paren_doval
                    206: ""run-time routine for constants""
                    207: w = *(Cell *)PFA(CFA);
                    208: #ifdef NO_IP
                    209: INST_TAIL;
                    210: goto *next_code;
                    211: #endif /* defined(NO_IP) */
                    212: 
1.139     anton     213: (dodoes) ( -- a_body R:a_retaddr )     gforth-internal paren_dodoes
                    214: ""run-time routine for @code{does>}-defined words""
1.148     anton     215: #ifdef NO_IP
                    216: a_retaddr = next_code;
                    217: a_body = PFA(CFA);
                    218: INST_TAIL;
1.211     pazsan    219: #ifdef DEBUG
                    220: fprintf(stderr, "dodoes to %x, push %x\n", a_retaddr, a_body);
                    221: #endif
1.148     anton     222: goto **(Label *)DOES_CODE1(CFA);
                    223: #else /* !defined(NO_IP) */
1.141     anton     224: a_retaddr = (Cell *)IP;
1.139     anton     225: a_body = PFA(CFA);
1.211     pazsan    226: #ifdef DEBUG
                    227: fprintf(stderr, "dodoes to %x, push %x\n", a_retaddr, a_body);
                    228: #endif
1.139     anton     229: SET_IP(DOES_CODE1(CFA));
1.148     anton     230: #endif /* !defined(NO_IP) */
1.139     anton     231: 
                    232: (does-handler) ( -- )  gforth-internal paren_does_handler
                    233: ""just a slot to have an encoding for the DOESJUMP, 
                    234: which is no longer used anyway (!! eliminate this)""
1.140     anton     235: 
                    236: \F [endif]
1.139     anton     237: 
1.83      pazsan    238: \g control
                    239: 
1.47      anton     240: noop   ( -- )          gforth
1.1       anton     241: :
                    242:  ;
                    243: 
1.112     pazsan    244: call   ( #a_callee -- R:a_retaddr )    new
                    245: ""Call callee (a variant of docol with inline argument).""
                    246: #ifdef NO_IP
1.148     anton     247: assert(0);
1.112     pazsan    248: INST_TAIL;
                    249: JUMP(a_callee);
                    250: #else
                    251: #ifdef DEBUG
                    252:     {
                    253:       CFA_TO_NAME((((Cell *)a_callee)-2));
                    254:       fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
                    255:              len,name);
                    256:     }
                    257: #endif
                    258: a_retaddr = (Cell *)IP;
                    259: SET_IP((Xt *)a_callee);
                    260: #endif
1.1       anton     261: 
1.47      anton     262: execute        ( xt -- )               core
1.29      crook     263: ""Perform the semantics represented by the execution token, @i{xt}.""
1.210     pazsan    264: #ifdef DEBUG
                    265: fprintf(stderr, "execute %08x\n", xt);
                    266: #endif
1.102     anton     267: #ifndef NO_IP
1.1       anton     268: ip=IP;
1.102     anton     269: #endif
1.76      anton     270: SUPER_END;
1.161     anton     271: VM_JUMP(EXEC1(xt));
1.1       anton     272: 
1.47      anton     273: perform        ( a_addr -- )   gforth
1.55      anton     274: ""@code{@@ execute}.""
1.1       anton     275: /* and pfe */
1.102     anton     276: #ifndef NO_IP
1.1       anton     277: ip=IP;
1.102     anton     278: #endif
1.76      anton     279: SUPER_END;
1.161     anton     280: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.1       anton     281: :
                    282:  @ execute ;
                    283: 
1.112     pazsan    284: ;s     ( R:w -- )              gforth  semis
                    285: ""The primitive compiled by @code{EXIT}.""
                    286: #ifdef NO_IP
                    287: INST_TAIL;
                    288: goto *(void *)w;
                    289: #else
                    290: SET_IP((Xt *)w);
                    291: #endif
                    292: 
                    293: unloop ( R:w1 R:w2 -- )        core
                    294: /* !! alias for 2rdrop */
                    295: :
                    296:  r> rdrop rdrop >r ;
                    297: 
                    298: lit-perform    ( #a_addr -- )  new     lit_perform
                    299: #ifndef NO_IP
                    300: ip=IP;
                    301: #endif
                    302: SUPER_END;
1.161     anton     303: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.112     pazsan    304: 
                    305: does-exec ( #a_cfa -- R:nest a_pfa )   new     does_exec
                    306: #ifdef NO_IP
                    307: /* compiled to LIT CALL by compile_prim */
                    308: assert(0);
                    309: #else
                    310: a_pfa = PFA(a_cfa);
                    311: nest = (Cell)IP;
                    312: #ifdef DEBUG
                    313:     {
                    314:       CFA_TO_NAME(a_cfa);
                    315:       fprintf(stderr,"%08lx: does %08lx %.*s\n",
                    316:              (Cell)ip,(Cell)a_cfa,len,name);
                    317:     }
                    318: #endif
                    319: SET_IP(DOES_CODE1(a_cfa));
                    320: #endif
                    321: 
1.15      pazsan    322: \+glocals
1.1       anton     323: 
1.112     pazsan    324: branch-lp+!# ( #a_target #nlocals -- ) gforth  branch_lp_plus_store_number
1.1       anton     325: /* this will probably not be used */
1.68      anton     326: lp += nlocals;
1.112     pazsan    327: #ifdef NO_IP
                    328: INST_TAIL;
                    329: JUMP(a_target);
                    330: #else
                    331: SET_IP((Xt *)a_target);
                    332: #endif
1.1       anton     333: 
1.15      pazsan    334: \+
1.1       anton     335: 
1.112     pazsan    336: branch ( #a_target -- )        gforth
                    337: #ifdef NO_IP
                    338: INST_TAIL;
                    339: JUMP(a_target);
                    340: #else
                    341: SET_IP((Xt *)a_target);
                    342: #endif
1.1       anton     343: :
1.112     pazsan    344:  r> @ >r ;
1.1       anton     345: 
1.112     pazsan    346: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
1.1       anton     347: \ this is non-syntactical: code must open a brace that is closed by the macro
                    348: define(condbranch,
1.159     anton     349: $1 ( `#'a_target $2 ) $3
                    350: $4     #ifdef NO_IP
                    351: INST_TAIL;
                    352: #endif
                    353: $5     #ifdef NO_IP
                    354: JUMP(a_target);
                    355: #else
                    356: SET_IP((Xt *)a_target);
1.214     anton     357: ifelse(condbranch_opt,`1',`INST_TAIL; NEXT_P2;',`/* condbranch_opt=0 */')
1.159     anton     358: #endif
                    359: }
1.214     anton     360: ifelse(condbranch_opt,`1',`SUPER_CONTINUE;',`/* condbranch_opt=0 */')
1.159     anton     361: $6
                    362: 
                    363: \+glocals
                    364: 
                    365: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
                    366: $4     #ifdef NO_IP
                    367: INST_TAIL;
                    368: #endif
                    369: $5     lp += nlocals;
                    370: #ifdef NO_IP
                    371: JUMP(a_target);
                    372: #else
                    373: SET_IP((Xt *)a_target);
1.214     anton     374: ifelse(condbranch_opt,`1',`INST_TAIL; NEXT_P2;',`/* condbranch_opt=0 */')
1.159     anton     375: #endif
                    376: }
1.214     anton     377: ifelse(condbranch_opt,`1',`SUPER_CONTINUE;',`/* condbranch_opt=0 */')
1.1       anton     378: 
1.15      pazsan    379: \+
1.1       anton     380: )
                    381: 
1.68      anton     382: condbranch(?branch,f --,f83    question_branch,
1.112     pazsan    383: ,if (f==0) {
1.5       jwilke    384: ,:
1.112     pazsan    385:  0= dup 0=          \ !f f
                    386:  r> tuck cell+      \ !f branchoffset f IP+
                    387:  and -rot @ and or  \ f&IP+|!f&branch
1.5       jwilke    388:  >r ;)
1.1       anton     389: 
                    390: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
                    391: \ is only used in if's (yet)
                    392: 
1.15      pazsan    393: \+xconds
1.1       anton     394: 
1.172     anton     395: ?dup-?branch   ( #a_target f -- S:... )        new     question_dupe_question_branch
1.1       anton     396: ""The run-time procedure compiled by @code{?DUP-IF}.""
                    397: if (f==0) {
1.112     pazsan    398: #ifdef NO_IP
                    399: INST_TAIL;
                    400: JUMP(a_target);
                    401: #else
                    402: SET_IP((Xt *)a_target);
                    403: #endif
1.174     anton     404: } else {
1.172     anton     405: sp--;
                    406: sp[0]=f;
1.174     anton     407: }
1.1       anton     408: 
1.172     anton     409: ?dup-0=-?branch ( #a_target f -- S:... ) new   question_dupe_zero_equals_question_branch
1.1       anton     410: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
                    411: if (f!=0) {
                    412:   sp--;
1.172     anton     413:   sp[0]=f;
1.112     pazsan    414: #ifdef NO_IP
                    415:   JUMP(a_target);
                    416: #else
                    417:   SET_IP((Xt *)a_target);
                    418: #endif
1.1       anton     419: }
                    420: 
1.15      pazsan    421: \+
1.31      jwilke    422: \fhas? skiploopprims 0= [IF]
1.1       anton     423: 
1.68      anton     424: condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
1.65      anton     425: n2=n1-1;
1.112     pazsan    426: ,if (n1) {
1.1       anton     427: ,:
                    428:  r> r> dup 1- >r
1.112     pazsan    429:  IF @ >r ELSE cell+ >r THEN ;)
1.1       anton     430: 
1.68      anton     431: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth        paren_loop,
1.65      anton     432: n2=n1+1;
1.112     pazsan    433: ,if (n2 != nlimit) {
1.1       anton     434: ,:
                    435:  r> r> 1+ r> 2dup =
                    436:  IF >r 1- >r cell+ >r
1.112     pazsan    437:  ELSE >r >r @ >r THEN ;)
1.1       anton     438: 
1.68      anton     439: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
1.1       anton     440: /* !! check this thoroughly */
                    441: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
                    442: /* dependent upon two's complement arithmetic */
1.65      anton     443: Cell olddiff = n1-nlimit;
                    444: n2=n1+n;       
1.149     anton     445: ,if (((olddiff^(olddiff+n))    /* the limit is not crossed */
                    446:      &(olddiff^n))            /* OR it is a wrap-around effect */
                    447:     >=0) { /* & is used to avoid having two branches for gforth-native */
1.1       anton     448: ,:
                    449:  r> swap
                    450:  r> r> 2dup - >r
                    451:  2 pick r@ + r@ xor 0< 0=
                    452:  3 pick r> xor 0< 0= or
1.112     pazsan    453:  IF    >r + >r @ >r
1.1       anton     454:  ELSE  >r >r drop cell+ >r THEN ;)
                    455: 
1.15      pazsan    456: \+xconds
1.1       anton     457: 
1.68      anton     458: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
1.65      anton     459: UCell olddiff = n1-nlimit;
                    460: n2=n1-u;
1.112     pazsan    461: ,if (olddiff>u) {
1.1       anton     462: ,)
                    463: 
1.68      anton     464: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth    paren_symmetric_plus_loop,
1.1       anton     465: ""The run-time procedure compiled by S+LOOP. It loops until the index
                    466: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
                    467: version of (+LOOP).""
                    468: /* !! check this thoroughly */
1.65      anton     469: Cell diff = n1-nlimit;
1.1       anton     470: Cell newdiff = diff+n;
                    471: if (n<0) {
                    472:     diff = -diff;
                    473:     newdiff = -newdiff;
                    474: }
1.65      anton     475: n2=n1+n;
1.149     anton     476: ,if (((~diff)|newdiff)<0) { /* use | to avoid two branches for gforth-native */
1.1       anton     477: ,)
                    478: 
1.15      pazsan    479: \+
1.1       anton     480: 
1.112     pazsan    481: (for)   ( ncount -- R:nlimit R:ncount )         cmFORTH         paren_for
1.1       anton     482: /* or (for) = >r -- collides with unloop! */
1.65      anton     483: nlimit=0;
1.1       anton     484: :
                    485:  r> swap 0 >r >r >r ;
                    486: 
1.112     pazsan    487: (do)    ( nlimit nstart -- R:nlimit R:nstart )  gforth          paren_do
1.1       anton     488: :
                    489:  r> swap rot >r >r >r ;
                    490: 
1.112     pazsan    491: (?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth  paren_question_do
                    492: #ifdef NO_IP
                    493:     INST_TAIL;
                    494: #endif
1.1       anton     495: if (nstart == nlimit) {
1.112     pazsan    496: #ifdef NO_IP
                    497:     JUMP(a_target);
                    498: #else
                    499:     SET_IP((Xt *)a_target);
                    500: #endif
1.1       anton     501: }
                    502: :
                    503:   2dup =
                    504:   IF   r> swap rot >r >r
1.112     pazsan    505:        @ >r
1.1       anton     506:   ELSE r> swap rot >r >r
                    507:        cell+ >r
                    508:   THEN ;                               \ --> CORE-EXT
                    509: 
1.15      pazsan    510: \+xconds
1.1       anton     511: 
1.112     pazsan    512: (+do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
                    513: #ifdef NO_IP
                    514:     INST_TAIL;
                    515: #endif
1.1       anton     516: if (nstart >= nlimit) {
1.112     pazsan    517: #ifdef NO_IP
                    518:     JUMP(a_target);
                    519: #else
                    520:     SET_IP((Xt *)a_target);
                    521: #endif
1.1       anton     522: }
                    523: :
                    524:  swap 2dup
                    525:  r> swap >r swap >r
                    526:  >=
                    527:  IF
1.112     pazsan    528:      @
1.1       anton     529:  ELSE
                    530:      cell+
                    531:  THEN  >r ;
                    532: 
1.112     pazsan    533: (u+do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
                    534: #ifdef NO_IP
                    535:     INST_TAIL;
                    536: #endif
1.1       anton     537: if (ustart >= ulimit) {
1.112     pazsan    538: #ifdef NO_IP
                    539: JUMP(a_target);
                    540: #else
                    541: SET_IP((Xt *)a_target);
                    542: #endif
1.1       anton     543: }
                    544: :
                    545:  swap 2dup
                    546:  r> swap >r swap >r
                    547:  u>=
                    548:  IF
1.112     pazsan    549:      @
1.1       anton     550:  ELSE
                    551:      cell+
                    552:  THEN  >r ;
                    553: 
1.112     pazsan    554: (-do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
                    555: #ifdef NO_IP
                    556:     INST_TAIL;
                    557: #endif
1.1       anton     558: if (nstart <= nlimit) {
1.112     pazsan    559: #ifdef NO_IP
                    560: JUMP(a_target);
                    561: #else
                    562: SET_IP((Xt *)a_target);
                    563: #endif
1.1       anton     564: }
                    565: :
                    566:  swap 2dup
                    567:  r> swap >r swap >r
                    568:  <=
                    569:  IF
1.112     pazsan    570:      @
1.1       anton     571:  ELSE
                    572:      cell+
                    573:  THEN  >r ;
                    574: 
1.112     pazsan    575: (u-do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
                    576: #ifdef NO_IP
                    577:     INST_TAIL;
                    578: #endif
1.1       anton     579: if (ustart <= ulimit) {
1.112     pazsan    580: #ifdef NO_IP
                    581: JUMP(a_target);
                    582: #else
                    583: SET_IP((Xt *)a_target);
                    584: #endif
1.1       anton     585: }
                    586: :
                    587:  swap 2dup
                    588:  r> swap >r swap >r
                    589:  u<=
                    590:  IF
1.112     pazsan    591:      @
1.1       anton     592:  ELSE
                    593:      cell+
                    594:  THEN  >r ;
                    595: 
1.15      pazsan    596: \+
1.1       anton     597: 
1.5       jwilke    598: \ don't make any assumptions where the return stack is!!
                    599: \ implement this in machine code if it should run quickly!
                    600: 
1.65      anton     601: i      ( R:n -- R:n n )                core
1.1       anton     602: :
1.5       jwilke    603: \ rp@ cell+ @ ;
                    604:   r> r> tuck >r >r ;
1.1       anton     605: 
1.65      anton     606: i'     ( R:w R:w2 -- R:w R:w2 w )              gforth          i_tick
1.1       anton     607: :
1.5       jwilke    608: \ rp@ cell+ cell+ @ ;
                    609:   r> r> r> dup itmp ! >r >r >r itmp @ ;
                    610: variable itmp
1.1       anton     611: 
1.215     anton     612: j      ( R:w R:w1 R:w2 -- w R:w R:w1 R:w2 )    core
1.1       anton     613: :
1.5       jwilke    614: \ rp@ cell+ cell+ cell+ @ ;
                    615:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
                    616: [IFUNDEF] itmp variable itmp [THEN]
1.1       anton     617: 
1.215     anton     618: k      ( R:w R:w1 R:w2 R:w3 R:w4 -- w R:w R:w1 R:w2 R:w3 R:w4 )        gforth
1.1       anton     619: :
1.5       jwilke    620: \ rp@ [ 5 cells ] Literal + @ ;
                    621:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
                    622: [IFUNDEF] itmp variable itmp [THEN]
1.31      jwilke    623: 
                    624: \f[THEN]
1.1       anton     625: 
                    626: \ digit is high-level: 0/0%
                    627: 
1.83      pazsan    628: \g strings
                    629: 
1.47      anton     630: move   ( c_from c_to ucount -- )               core
1.52      anton     631: ""Copy the contents of @i{ucount} aus at @i{c-from} to
1.33      anton     632: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
1.52      anton     633: /* !! note that the standard specifies addr, not c-addr */
1.1       anton     634: memmove(c_to,c_from,ucount);
                    635: /* make an Ifdef for bsd and others? */
                    636: :
                    637:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
                    638: 
1.47      anton     639: cmove  ( c_from c_to u -- )    string  c_move
1.33      anton     640: ""Copy the contents of @i{ucount} characters from data space at
                    641: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    642: from low address to high address; i.e., for overlapping areas it is
                    643: safe if @i{c-to}=<@i{c-from}.""
1.125     anton     644: cmove(c_from,c_to,u);
1.1       anton     645: :
                    646:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
                    647: 
1.47      anton     648: cmove> ( c_from c_to u -- )    string  c_move_up
1.33      anton     649: ""Copy the contents of @i{ucount} characters from data space at
                    650: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    651: from high address to low address; i.e., for overlapping areas it is
                    652: safe if @i{c-to}>=@i{c-from}.""
1.125     anton     653: cmove_up(c_from,c_to,u);
1.1       anton     654: :
                    655:  dup 0= IF  drop 2drop exit  THEN
                    656:  rot over + -rot bounds swap 1-
                    657:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
                    658: 
1.47      anton     659: fill   ( c_addr u c -- )       core
1.52      anton     660: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
1.1       anton     661: memset(c_addr,c,u);
                    662: :
                    663:  -rot bounds
                    664:  ?DO  dup I c!  LOOP  drop ;
                    665: 
1.47      anton     666: compare        ( c_addr1 u1 c_addr2 u2 -- n )  string
1.29      crook     667: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    668: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
1.1       anton     669: is 1. Currently this is based on the machine's character
1.26      crook     670: comparison. In the future, this may change to consider the current
1.1       anton     671: locale and its collation order.""
1.46      pazsan    672: /* close ' to keep fontify happy */ 
1.125     anton     673: n = compare(c_addr1, u1, c_addr2, u2);
1.1       anton     674: :
1.43      pazsan    675:  rot 2dup swap - >r min swap -text dup
                    676:  IF  rdrop  ELSE  drop r> sgn  THEN ;
1.143     pazsan    677: : -text ( c_addr1 u c_addr2 -- n )
                    678:  swap bounds
                    679:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    680:  ELSE  c@ I c@ - unloop  THEN  sgn ;
1.43      pazsan    681: : sgn ( n -- -1/0/1 )
                    682:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     683: 
1.125     anton     684: \ -text is only used by replaced primitives now; move it elsewhere
                    685: \ -text        ( c_addr1 u c_addr2 -- n )      new     dash_text
                    686: \ n = memcmp(c_addr1, c_addr2, u);
                    687: \ if (n<0)
                    688: \   n = -1;
                    689: \ else if (n>0)
                    690: \   n = 1;
                    691: \ :
                    692: \  swap bounds
                    693: \  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    694: \  ELSE  c@ I c@ - unloop  THEN  sgn ;
                    695: \ : sgn ( n -- -1/0/1 )
                    696: \  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     697: 
1.47      anton     698: toupper        ( c1 -- c2 )    gforth
1.29      crook     699: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
1.25      anton     700: is the equivalent upper-case character. All other characters are unchanged.""
1.1       anton     701: c2 = toupper(c1);
                    702: :
                    703:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
                    704: 
1.223     anton     705: capscompare    ( c_addr1 u1 c_addr2 u2 -- n )  gforth
1.188     pazsan    706: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    707: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
                    708: is 1. Currently this is based on the machine's character
                    709: comparison. In the future, this may change to consider the current
                    710: locale and its collation order.""
                    711: /* close ' to keep fontify happy */ 
                    712: n = capscompare(c_addr1, u1, c_addr2, u2);
                    713: 
1.47      anton     714: /string        ( c_addr1 u1 n -- c_addr2 u2 )  string  slash_string
1.29      crook     715: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
1.27      crook     716: characters from the start of the string.""
1.1       anton     717: c_addr2 = c_addr1+n;
                    718: u2 = u1-n;
                    719: :
                    720:  tuck - >r + r> dup 0< IF  - 0  THEN ;
                    721: 
1.83      pazsan    722: \g arith
                    723: 
1.112     pazsan    724: lit    ( #w -- w )             gforth
                    725: :
                    726:  r> dup @ swap cell+ >r ;
                    727: 
1.47      anton     728: +      ( n1 n2 -- n )          core    plus
1.1       anton     729: n = n1+n2;
                    730: 
1.112     pazsan    731: \ lit+ / lit_plus = lit +
                    732: 
                    733: lit+   ( n1 #n2 -- n )         new     lit_plus
1.211     pazsan    734: #ifdef DEBUG
                    735: fprintf(stderr, "lit+ %08x\n", n2);
                    736: #endif
1.112     pazsan    737: n=n1+n2;
                    738: 
1.1       anton     739: \ PFE-0.9.14 has it differently, but the next release will have it as follows
1.47      anton     740: under+ ( n1 n2 n3 -- n n2 )    gforth  under_plus
1.29      crook     741: ""add @i{n3} to @i{n1} (giving @i{n})""
1.1       anton     742: n = n1+n3;
                    743: :
                    744:  rot + swap ;
                    745: 
1.47      anton     746: -      ( n1 n2 -- n )          core    minus
1.1       anton     747: n = n1-n2;
                    748: :
                    749:  negate + ;
                    750: 
1.47      anton     751: negate ( n1 -- n2 )            core
1.1       anton     752: /* use minus as alias */
                    753: n2 = -n1;
                    754: :
                    755:  invert 1+ ;
                    756: 
1.47      anton     757: 1+     ( n1 -- n2 )            core            one_plus
1.1       anton     758: n2 = n1+1;
                    759: :
                    760:  1 + ;
                    761: 
1.47      anton     762: 1-     ( n1 -- n2 )            core            one_minus
1.1       anton     763: n2 = n1-1;
                    764: :
                    765:  1 - ;
                    766: 
1.47      anton     767: max    ( n1 n2 -- n )  core
1.1       anton     768: if (n1<n2)
                    769:   n = n2;
                    770: else
                    771:   n = n1;
                    772: :
                    773:  2dup < IF swap THEN drop ;
                    774: 
1.47      anton     775: min    ( n1 n2 -- n )  core
1.1       anton     776: if (n1<n2)
                    777:   n = n1;
                    778: else
                    779:   n = n2;
                    780: :
                    781:  2dup > IF swap THEN drop ;
                    782: 
1.52      anton     783: abs    ( n -- u )      core
                    784: if (n<0)
                    785:   u = -n;
1.1       anton     786: else
1.52      anton     787:   u = n;
1.1       anton     788: :
                    789:  dup 0< IF negate THEN ;
                    790: 
1.47      anton     791: *      ( n1 n2 -- n )          core    star
1.1       anton     792: n = n1*n2;
                    793: :
                    794:  um* drop ;
                    795: 
1.47      anton     796: /      ( n1 n2 -- n )          core    slash
1.1       anton     797: n = n1/n2;
1.200     anton     798: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     799:   throw(BALL_DIVZERO);
1.200     anton     800: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     801:   throw(BALL_RESULTRANGE);
1.197     anton     802: if (FLOORED_DIV && ((n1^n2) < 0) && (n1%n2 != 0))
                    803:   n--;
1.1       anton     804: :
                    805:  /mod nip ;
                    806: 
1.47      anton     807: mod    ( n1 n2 -- n )          core
1.1       anton     808: n = n1%n2;
1.200     anton     809: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     810:   throw(BALL_DIVZERO);
1.200     anton     811: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     812:   throw(BALL_RESULTRANGE);
1.169     pazsan    813: if(FLOORED_DIV && ((n1^n2) < 0) && n!=0) n += n2;
1.1       anton     814: :
                    815:  /mod drop ;
                    816: 
1.47      anton     817: /mod   ( n1 n2 -- n3 n4 )              core            slash_mod
1.1       anton     818: n4 = n1/n2;
                    819: n3 = n1%n2; /* !! is this correct? look into C standard! */
1.200     anton     820: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     821:   throw(BALL_DIVZERO);
1.200     anton     822: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     823:   throw(BALL_RESULTRANGE);
1.169     pazsan    824: if (FLOORED_DIV && ((n1^n2) < 0) && n3!=0) {
1.162     pazsan    825:   n4--;
                    826:   n3+=n2;
                    827: }
1.1       anton     828: :
                    829:  >r s>d r> fm/mod ;
                    830: 
1.162     pazsan    831: */mod  ( n1 n2 n3 -- n4 n5 )   core    star_slash_mod
                    832: ""n1*n2=n3*n5+n4, with the intermediate result (n1*n2) being double.""
                    833: #ifdef BUGGY_LL_MUL
                    834: DCell d = mmul(n1,n2);
                    835: #else
                    836: DCell d = (DCell)n1 * (DCell)n2;
                    837: #endif
1.202     anton     838: #ifdef ASM_SM_SLASH_REM
                    839: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, n4, n5);
1.207     anton     840: if (FLOORED_DIV && ((DHI(d)^n3)<0) && n4!=0) {
1.202     anton     841:   if (CHECK_DIVISION && n5 == CELL_MIN)
                    842:     throw(BALL_RESULTRANGE);
                    843:   n5--;
                    844:   n4+=n3;
                    845: }
                    846: #else
1.207     anton     847: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.162     pazsan    848: n4=DHI(r);
                    849: n5=DLO(r);
                    850: #endif
                    851: :
                    852:  >r m* r> fm/mod ;
                    853: 
                    854: */     ( n1 n2 n3 -- n4 )      core    star_slash
                    855: ""n4=(n1*n2)/n3, with the intermediate result being double.""
                    856: #ifdef BUGGY_LL_MUL
                    857: DCell d = mmul(n1,n2);
                    858: #else
                    859: DCell d = (DCell)n1 * (DCell)n2;
                    860: #endif
1.202     anton     861: #ifdef ASM_SM_SLASH_REM
                    862: Cell remainder;
                    863: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, remainder, n4);
1.207     anton     864: if (FLOORED_DIV && ((DHI(d)^n3)<0) && remainder!=0) {
1.202     anton     865:   if (CHECK_DIVISION && n4 == CELL_MIN)
                    866:     throw(BALL_RESULTRANGE);
                    867:   n4--;
                    868: }
                    869: #else
1.207     anton     870: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.168     pazsan    871: n4=DLO(r);
1.162     pazsan    872: #endif
                    873: :
                    874:  */mod nip ;
                    875: 
1.47      anton     876: 2*     ( n1 -- n2 )            core            two_star
1.52      anton     877: ""Shift left by 1; also works on unsigned numbers""
1.1       anton     878: n2 = 2*n1;
                    879: :
                    880:  dup + ;
                    881: 
1.47      anton     882: 2/     ( n1 -- n2 )            core            two_slash
1.52      anton     883: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                    884: division by 2 (note that @code{/} not necessarily floors).""
1.1       anton     885: n2 = n1>>1;
                    886: :
                    887:  dup MINI and IF 1 ELSE 0 THEN
1.187     pazsan    888:  [ bits/char cell * 1- ] literal 
1.5       jwilke    889:  0 DO 2* swap dup 2* >r MINI and 
1.1       anton     890:      IF 1 ELSE 0 THEN or r> swap
                    891:  LOOP nip ;
                    892: 
1.47      anton     893: fm/mod ( d1 n1 -- n2 n3 )              core            f_m_slash_mod
1.29      crook     894: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
1.201     anton     895: #ifdef ASM_SM_SLASH_REM
1.203     anton     896: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.169     pazsan    897: if (((DHI(d1)^n1)<0) && n2!=0) {
1.200     anton     898:   if (CHECK_DIVISION && n3 == CELL_MIN)
1.198     anton     899:     throw(BALL_RESULTRANGE);
1.165     anton     900:   n3--;
                    901:   n2+=n1;
                    902: }
1.201     anton     903: #else /* !defined(ASM_SM_SLASH_REM) */
                    904: DCell r = fmdiv(d1,n1);
                    905: n2=DHI(r);
                    906: n3=DLO(r);
1.203     anton     907: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     908: :
                    909:  dup >r dup 0< IF  negate >r dnegate r>  THEN
                    910:  over       0< IF  tuck + swap  THEN
                    911:  um/mod
                    912:  r> 0< IF  swap negate swap  THEN ;
                    913: 
1.47      anton     914: sm/rem ( d1 n1 -- n2 n3 )              core            s_m_slash_rem
1.29      crook     915: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
1.165     anton     916: #ifdef ASM_SM_SLASH_REM
1.203     anton     917: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.165     anton     918: #else /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     919: DCell r = smdiv(d1,n1);
1.162     pazsan    920: n2=DHI(r);
                    921: n3=DLO(r);
1.165     anton     922: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     923: :
                    924:  over >r dup >r abs -rot
                    925:  dabs rot um/mod
                    926:  r> r@ xor 0< IF       negate       THEN
                    927:  r>        0< IF  swap negate swap  THEN ;
                    928: 
1.47      anton     929: m*     ( n1 n2 -- d )          core    m_star
1.158     pazsan    930: #ifdef BUGGY_LL_MUL
1.1       anton     931: d = mmul(n1,n2);
                    932: #else
                    933: d = (DCell)n1 * (DCell)n2;
                    934: #endif
                    935: :
                    936:  2dup      0< and >r
                    937:  2dup swap 0< and >r
                    938:  um* r> - r> - ;
                    939: 
1.47      anton     940: um*    ( u1 u2 -- ud )         core    u_m_star
1.1       anton     941: /* use u* as alias */
1.158     pazsan    942: #ifdef BUGGY_LL_MUL
1.1       anton     943: ud = ummul(u1,u2);
                    944: #else
                    945: ud = (UDCell)u1 * (UDCell)u2;
                    946: #endif
                    947: :
1.137     pazsan    948:    0 -rot dup [ 8 cells ] literal -
1.1       anton     949:    DO
1.137     pazsan    950:        dup 0< I' and d2*+ drop
                    951:    LOOP ;
1.1       anton     952: : d2*+ ( ud n -- ud+n c )
                    953:    over MINI
                    954:    and >r >r 2dup d+ swap r> + swap r> ;
                    955: 
1.47      anton     956: um/mod ( ud u1 -- u2 u3 )              core    u_m_slash_mod
1.32      anton     957: ""ud=u3*u1+u2, u1>u2>=0""
1.165     anton     958: #ifdef ASM_UM_SLASH_MOD
1.203     anton     959: ASM_UM_SLASH_MOD(DLO(ud), DHI(ud), u1, u2, u3);
1.165     anton     960: #else /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     961: UDCell r = umdiv(ud,u1);
1.162     pazsan    962: u2=DHI(r);
                    963: u3=DLO(r);
1.165     anton     964: #endif /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     965: :
                    966:    0 swap [ 8 cells 1 + ] literal 0
1.5       jwilke    967:    ?DO /modstep
1.1       anton     968:    LOOP drop swap 1 rshift or swap ;
                    969: : /modstep ( ud c R: u -- ud-?u c R: u )
1.5       jwilke    970:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
1.1       anton     971: : d2*+ ( ud n -- ud+n c )
                    972:    over MINI
                    973:    and >r >r 2dup d+ swap r> + swap r> ;
                    974: 
1.47      anton     975: m+     ( d1 n -- d2 )          double          m_plus
1.158     pazsan    976: #ifdef BUGGY_LL_ADD
                    977: DLO_IS(d2, DLO(d1)+n);
                    978: DHI_IS(d2, DHI(d1) - (n<0) + (DLO(d2)<DLO(d1)));
1.1       anton     979: #else
                    980: d2 = d1+n;
                    981: #endif
                    982: :
                    983:  s>d d+ ;
                    984: 
1.47      anton     985: d+     ( d1 d2 -- d )          double  d_plus
1.158     pazsan    986: #ifdef BUGGY_LL_ADD
                    987: DLO_IS(d, DLO(d1) + DLO(d2));
                    988: DHI_IS(d, DHI(d1) + DHI(d2) + (d.lo<DLO(d1)));
1.1       anton     989: #else
                    990: d = d1+d2;
                    991: #endif
                    992: :
                    993:  rot + >r tuck + swap over u> r> swap - ;
                    994: 
1.47      anton     995: d-     ( d1 d2 -- d )          double          d_minus
1.158     pazsan    996: #ifdef BUGGY_LL_ADD
                    997: DLO_IS(d, DLO(d1) - DLO(d2));
                    998: DHI_IS(d, DHI(d1)-DHI(d2)-(DLO(d1)<DLO(d2)));
1.1       anton     999: #else
                   1000: d = d1-d2;
                   1001: #endif
                   1002: :
                   1003:  dnegate d+ ;
                   1004: 
1.47      anton    1005: dnegate        ( d1 -- d2 )            double  d_negate
1.1       anton    1006: /* use dminus as alias */
1.158     pazsan   1007: #ifdef BUGGY_LL_ADD
1.1       anton    1008: d2 = dnegate(d1);
                   1009: #else
                   1010: d2 = -d1;
                   1011: #endif
                   1012: :
                   1013:  invert swap negate tuck 0= - ;
                   1014: 
1.47      anton    1015: d2*    ( d1 -- d2 )            double          d_two_star
1.52      anton    1016: ""Shift left by 1; also works on unsigned numbers""
1.205     anton    1017: d2 = DLSHIFT(d1,1);
1.1       anton    1018: :
                   1019:  2dup d+ ;
                   1020: 
1.47      anton    1021: d2/    ( d1 -- d2 )            double          d_two_slash
1.52      anton    1022: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                   1023: division by 2.""
1.158     pazsan   1024: #ifdef BUGGY_LL_SHIFT
                   1025: DHI_IS(d2, DHI(d1)>>1);
                   1026: DLO_IS(d2, (DLO(d1)>>1) | (DHI(d1)<<(CELL_BITS-1)));
1.1       anton    1027: #else
                   1028: d2 = d1>>1;
                   1029: #endif
                   1030: :
                   1031:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
                   1032:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
                   1033: 
1.47      anton    1034: and    ( w1 w2 -- w )          core
1.1       anton    1035: w = w1&w2;
                   1036: 
1.47      anton    1037: or     ( w1 w2 -- w )          core
1.1       anton    1038: w = w1|w2;
                   1039: :
                   1040:  invert swap invert and invert ;
                   1041: 
1.47      anton    1042: xor    ( w1 w2 -- w )          core    x_or
1.1       anton    1043: w = w1^w2;
                   1044: 
1.47      anton    1045: invert ( w1 -- w2 )            core
1.1       anton    1046: w2 = ~w1;
                   1047: :
                   1048:  MAXU xor ;
                   1049: 
1.47      anton    1050: rshift ( u1 n -- u2 )          core    r_shift
1.53      anton    1051: ""Logical shift right by @i{n} bits.""
1.154     pazsan   1052: #ifdef BROKEN_SHIFT
                   1053:   u2 = rshift(u1, n);
                   1054: #else
                   1055:   u2 = u1 >> n;
                   1056: #endif
1.1       anton    1057: :
                   1058:     0 ?DO 2/ MAXI and LOOP ;
                   1059: 
1.47      anton    1060: lshift ( u1 n -- u2 )          core    l_shift
1.154     pazsan   1061: #ifdef BROKEN_SHIFT
                   1062:   u2 = lshift(u1, n);
                   1063: #else
                   1064:   u2 = u1 << n;
                   1065: #endif
1.1       anton    1066: :
                   1067:     0 ?DO 2* LOOP ;
                   1068: 
1.110     pazsan   1069: \g compare
                   1070: 
1.1       anton    1071: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1072: define(comparisons,
1.47      anton    1073: $1=    ( $2 -- f )             $6      $3equals
1.1       anton    1074: f = FLAG($4==$5);
                   1075: :
                   1076:     [ char $1x char 0 = [IF]
                   1077:        ] IF false ELSE true THEN [
                   1078:     [ELSE]
                   1079:        ] xor 0= [
                   1080:     [THEN] ] ;
                   1081: 
1.47      anton    1082: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton    1083: f = FLAG($4!=$5);
                   1084: :
                   1085:     [ char $1x char 0 = [IF]
                   1086:        ] IF true ELSE false THEN [
                   1087:     [ELSE]
                   1088:        ] xor 0<> [
                   1089:     [THEN] ] ;
                   1090: 
1.47      anton    1091: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton    1092: f = FLAG($4<$5);
                   1093: :
                   1094:     [ char $1x char 0 = [IF]
                   1095:        ] MINI and 0<> [
                   1096:     [ELSE] char $1x char u = [IF]
                   1097:        ]   2dup xor 0<  IF nip ELSE - THEN 0<  [
                   1098:        [ELSE]
                   1099:            ] MINI xor >r MINI xor r> u< [
                   1100:        [THEN]
                   1101:     [THEN] ] ;
                   1102: 
1.47      anton    1103: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton    1104: f = FLAG($4>$5);
                   1105: :
                   1106:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1107:     $1< ;
                   1108: 
1.47      anton    1109: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton    1110: f = FLAG($4<=$5);
                   1111: :
                   1112:     $1> 0= ;
                   1113: 
1.47      anton    1114: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton    1115: f = FLAG($4>=$5);
                   1116: :
                   1117:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1118:     $1<= ;
                   1119: 
                   1120: )
                   1121: 
                   1122: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
                   1123: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
                   1124: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
                   1125: 
                   1126: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1127: define(dcomparisons,
1.47      anton    1128: $1=    ( $2 -- f )             $6      $3equals
1.158     pazsan   1129: #ifdef BUGGY_LL_CMP
1.1       anton    1130: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
                   1131: #else
                   1132: f = FLAG($4==$5);
                   1133: #endif
                   1134: 
1.47      anton    1135: $1<>   ( $2 -- f )             $7      $3not_equals
1.158     pazsan   1136: #ifdef BUGGY_LL_CMP
1.1       anton    1137: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
                   1138: #else
                   1139: f = FLAG($4!=$5);
                   1140: #endif
                   1141: 
1.47      anton    1142: $1<    ( $2 -- f )             $8      $3less_than
1.158     pazsan   1143: #ifdef BUGGY_LL_CMP
1.1       anton    1144: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
                   1145: #else
                   1146: f = FLAG($4<$5);
                   1147: #endif
                   1148: 
1.47      anton    1149: $1>    ( $2 -- f )             $9      $3greater_than
1.158     pazsan   1150: #ifdef BUGGY_LL_CMP
1.1       anton    1151: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
                   1152: #else
                   1153: f = FLAG($4>$5);
                   1154: #endif
                   1155: 
1.47      anton    1156: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.158     pazsan   1157: #ifdef BUGGY_LL_CMP
1.1       anton    1158: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
                   1159: #else
                   1160: f = FLAG($4<=$5);
                   1161: #endif
                   1162: 
1.47      anton    1163: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.158     pazsan   1164: #ifdef BUGGY_LL_CMP
1.1       anton    1165: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
                   1166: #else
                   1167: f = FLAG($4>=$5);
                   1168: #endif
                   1169: 
                   1170: )
                   1171: 
1.15      pazsan   1172: \+dcomps
1.1       anton    1173: 
                   1174: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
                   1175: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
                   1176: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
                   1177: 
1.15      pazsan   1178: \+
1.1       anton    1179: 
1.47      anton    1180: within ( u1 u2 u3 -- f )               core-ext
1.32      anton    1181: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
                   1182: unsigned and signed numbers (but not a mixture).  Another way to think
                   1183: about this word is to consider the numbers as a circle (wrapping
                   1184: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
                   1185: min-n for signed numbers); now consider the range from u2 towards
                   1186: increasing numbers up to and excluding u3 (giving an empty range if
1.52      anton    1187: u2=u3); if u1 is in this range, @code{within} returns true.""
1.1       anton    1188: f = FLAG(u1-u2 < u3-u2);
                   1189: :
                   1190:  over - >r - r> u< ;
                   1191: 
1.112     pazsan   1192: \g stack
                   1193: 
                   1194: useraddr       ( #u -- a_addr )        new
                   1195: a_addr = (Cell *)(up+u);
                   1196: 
                   1197: up!    ( a_addr -- )   gforth  up_store
1.190     pazsan   1198: gforth_UP=up=(Address)a_addr;
1.112     pazsan   1199: :
                   1200:  up ! ;
                   1201: Variable UP
                   1202: 
1.172     anton    1203: sp@    ( S:... -- a_addr )             gforth          sp_fetch
                   1204: a_addr = sp;
1.1       anton    1205: 
1.172     anton    1206: sp!    ( a_addr -- S:... )             gforth          sp_store
1.1       anton    1207: sp = a_addr;
                   1208: 
1.47      anton    1209: rp@    ( -- a_addr )           gforth          rp_fetch
1.1       anton    1210: a_addr = rp;
                   1211: 
1.47      anton    1212: rp!    ( a_addr -- )           gforth          rp_store
1.1       anton    1213: rp = a_addr;
                   1214: 
1.15      pazsan   1215: \+floating
1.1       anton    1216: 
1.172     anton    1217: fp@    ( f:... -- f_addr )     gforth  fp_fetch
1.1       anton    1218: f_addr = fp;
                   1219: 
1.172     anton    1220: fp!    ( f_addr -- f:... )     gforth  fp_store
1.1       anton    1221: fp = f_addr;
                   1222: 
1.15      pazsan   1223: \+
1.1       anton    1224: 
1.65      anton    1225: >r     ( w -- R:w )            core    to_r
1.1       anton    1226: :
                   1227:  (>r) ;
                   1228: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
                   1229: 
1.65      anton    1230: r>     ( R:w -- w )            core    r_from
1.1       anton    1231: :
                   1232:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
                   1233: Create (rdrop) ' ;s A,
                   1234: 
1.65      anton    1235: rdrop  ( R:w -- )              gforth
1.1       anton    1236: :
                   1237:  r> r> drop >r ;
                   1238: 
1.136     pazsan   1239: 2>r    ( d -- R:d )    core-ext        two_to_r
1.1       anton    1240: :
                   1241:  swap r> swap >r swap >r >r ;
                   1242: 
1.136     pazsan   1243: 2r>    ( R:d -- d )    core-ext        two_r_from
1.1       anton    1244: :
                   1245:  r> r> swap r> swap >r swap ;
                   1246: 
1.136     pazsan   1247: 2r@    ( R:d -- R:d d )        core-ext        two_r_fetch
1.1       anton    1248: :
                   1249:  i' j ;
                   1250: 
1.136     pazsan   1251: 2rdrop ( R:d -- )              gforth  two_r_drop
1.1       anton    1252: :
                   1253:  r> r> drop r> drop >r ;
                   1254: 
1.47      anton    1255: over   ( w1 w2 -- w1 w2 w1 )           core
1.1       anton    1256: :
                   1257:  sp@ cell+ @ ;
                   1258: 
1.47      anton    1259: drop   ( w -- )                core
1.1       anton    1260: :
                   1261:  IF THEN ;
                   1262: 
1.47      anton    1263: swap   ( w1 w2 -- w2 w1 )              core
1.1       anton    1264: :
                   1265:  >r (swap) ! r> (swap) @ ;
                   1266: Variable (swap)
                   1267: 
1.47      anton    1268: dup    ( w -- w w )            core    dupe
1.1       anton    1269: :
                   1270:  sp@ @ ;
                   1271: 
1.47      anton    1272: rot    ( w1 w2 w3 -- w2 w3 w1 )        core    rote
1.1       anton    1273: :
                   1274: [ defined? (swap) [IF] ]
                   1275:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
                   1276: Variable (rot)
                   1277: [ELSE] ]
                   1278:     >r swap r> swap ;
                   1279: [THEN]
                   1280: 
1.47      anton    1281: -rot   ( w1 w2 w3 -- w3 w1 w2 )        gforth  not_rote
1.1       anton    1282: :
                   1283:  rot rot ;
                   1284: 
1.47      anton    1285: nip    ( w1 w2 -- w2 )         core-ext
1.1       anton    1286: :
1.6       jwilke   1287:  swap drop ;
1.1       anton    1288: 
1.47      anton    1289: tuck   ( w1 w2 -- w2 w1 w2 )   core-ext
1.1       anton    1290: :
                   1291:  swap over ;
                   1292: 
1.172     anton    1293: ?dup   ( w -- S:... w )        core    question_dupe
1.52      anton    1294: ""Actually the stack effect is: @code{( w -- 0 | w w )}.  It performs a
                   1295: @code{dup} if w is nonzero.""
1.1       anton    1296: if (w!=0) {
                   1297:   *--sp = w;
                   1298: }
                   1299: :
                   1300:  dup IF dup THEN ;
                   1301: 
1.172     anton    1302: pick   ( S:... u -- S:... w )          core-ext
1.52      anton    1303: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1.172     anton    1304: w = sp[u];
1.1       anton    1305: :
                   1306:  1+ cells sp@ + @ ;
                   1307: 
1.47      anton    1308: 2drop  ( w1 w2 -- )            core    two_drop
1.1       anton    1309: :
                   1310:  drop drop ;
                   1311: 
1.47      anton    1312: 2dup   ( w1 w2 -- w1 w2 w1 w2 )        core    two_dupe
1.1       anton    1313: :
                   1314:  over over ;
                   1315: 
1.47      anton    1316: 2over  ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )    core    two_over
1.1       anton    1317: :
                   1318:  3 pick 3 pick ;
                   1319: 
1.47      anton    1320: 2swap  ( w1 w2 w3 w4 -- w3 w4 w1 w2 )  core    two_swap
1.1       anton    1321: :
                   1322:  rot >r rot r> ;
                   1323: 
1.47      anton    1324: 2rot   ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )      double-ext      two_rote
1.1       anton    1325: :
                   1326:  >r >r 2swap r> r> 2swap ;
                   1327: 
1.47      anton    1328: 2nip   ( w1 w2 w3 w4 -- w3 w4 )        gforth  two_nip
1.1       anton    1329: :
                   1330:  2swap 2drop ;
                   1331: 
1.47      anton    1332: 2tuck  ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )    gforth  two_tuck
1.1       anton    1333: :
                   1334:  2swap 2over ;
                   1335: 
                   1336: \ toggle is high-level: 0.11/0.42%
                   1337: 
1.110     pazsan   1338: \g memory
                   1339: 
1.47      anton    1340: @      ( a_addr -- w )         core    fetch
1.52      anton    1341: ""@i{w} is the cell stored at @i{a_addr}.""
1.1       anton    1342: w = *a_addr;
                   1343: 
1.112     pazsan   1344: \ lit@ / lit_fetch = lit @
                   1345: 
                   1346: lit@           ( #a_addr -- w ) new    lit_fetch
                   1347: w = *a_addr;
                   1348: 
1.47      anton    1349: !      ( w a_addr -- )         core    store
1.52      anton    1350: ""Store @i{w} into the cell at @i{a-addr}.""
1.1       anton    1351: *a_addr = w;
                   1352: 
1.47      anton    1353: +!     ( n a_addr -- )         core    plus_store
1.52      anton    1354: ""Add @i{n} to the cell at @i{a-addr}.""
1.1       anton    1355: *a_addr += n;
                   1356: :
                   1357:  tuck @ + swap ! ;
                   1358: 
1.47      anton    1359: c@     ( c_addr -- c )         core    c_fetch
1.52      anton    1360: ""@i{c} is the char stored at @i{c_addr}.""
1.1       anton    1361: c = *c_addr;
                   1362: :
                   1363: [ bigendian [IF] ]
                   1364:     [ cell>bit 4 = [IF] ]
                   1365:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1366:        IF  $FF and  ELSE  8>>  THEN  ;
                   1367:     [ [ELSE] ]
                   1368:        dup [ cell 1- ] literal and
                   1369:        tuck - @ swap [ cell 1- ] literal xor
                   1370:        0 ?DO 8>> LOOP $FF and
                   1371:     [ [THEN] ]
                   1372: [ [ELSE] ]
                   1373:     [ cell>bit 4 = [IF] ]
                   1374:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1375:        IF  8>>  ELSE  $FF and  THEN
                   1376:     [ [ELSE] ]
                   1377:        dup [ cell  1- ] literal and 
                   1378:        tuck - @ swap
                   1379:        0 ?DO 8>> LOOP 255 and
                   1380:     [ [THEN] ]
                   1381: [ [THEN] ]
                   1382: ;
                   1383: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
                   1384: 
1.47      anton    1385: c!     ( c c_addr -- )         core    c_store
1.52      anton    1386: ""Store @i{c} into the char at @i{c-addr}.""
1.1       anton    1387: *c_addr = c;
                   1388: :
                   1389: [ bigendian [IF] ]
                   1390:     [ cell>bit 4 = [IF] ]
                   1391:        tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
                   1392:        dup -2 and @ over 1 and cells masks + @ and
                   1393:        r> or swap -2 and ! ;
                   1394:        Create masks $00FF , $FF00 ,
                   1395:     [ELSE] ]
                   1396:        dup [ cell 1- ] literal and dup 
                   1397:        [ cell 1- ] literal xor >r
                   1398:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1399:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1400:     [THEN]
                   1401: [ELSE] ]
                   1402:     [ cell>bit 4 = [IF] ]
                   1403:        tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
                   1404:        dup -2 and @ over 1 and cells masks + @ and
                   1405:        r> or swap -2 and ! ;
                   1406:        Create masks $FF00 , $00FF ,
                   1407:     [ELSE] ]
                   1408:        dup [ cell 1- ] literal and dup >r
                   1409:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1410:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1411:     [THEN]
                   1412: [THEN]
                   1413: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
                   1414: 
1.47      anton    1415: 2!     ( w1 w2 a_addr -- )             core    two_store
1.52      anton    1416: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1.1       anton    1417: a_addr[0] = w2;
                   1418: a_addr[1] = w1;
                   1419: :
                   1420:  tuck ! cell+ ! ;
                   1421: 
1.47      anton    1422: 2@     ( a_addr -- w1 w2 )             core    two_fetch
1.52      anton    1423: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
                   1424: the content of the next cell.""
1.1       anton    1425: w2 = a_addr[0];
                   1426: w1 = a_addr[1];
                   1427: :
                   1428:  dup cell+ @ swap @ ;
                   1429: 
1.47      anton    1430: cell+  ( a_addr1 -- a_addr2 )  core    cell_plus
1.52      anton    1431: ""@code{1 cells +}""
1.1       anton    1432: a_addr2 = a_addr1+1;
                   1433: :
                   1434:  cell + ;
                   1435: 
1.47      anton    1436: cells  ( n1 -- n2 )            core
1.52      anton    1437: "" @i{n2} is the number of address units of @i{n1} cells.""
1.1       anton    1438: n2 = n1 * sizeof(Cell);
                   1439: :
                   1440:  [ cell
                   1441:  2/ dup [IF] ] 2* [ [THEN]
                   1442:  2/ dup [IF] ] 2* [ [THEN]
                   1443:  2/ dup [IF] ] 2* [ [THEN]
                   1444:  2/ dup [IF] ] 2* [ [THEN]
                   1445:  drop ] ;
                   1446: 
1.47      anton    1447: char+  ( c_addr1 -- c_addr2 )  core    char_plus
1.52      anton    1448: ""@code{1 chars +}.""
1.1       anton    1449: c_addr2 = c_addr1 + 1;
                   1450: :
                   1451:  1+ ;
                   1452: 
1.47      anton    1453: (chars)        ( n1 -- n2 )    gforth  paren_chars
1.1       anton    1454: n2 = n1 * sizeof(Char);
                   1455: :
                   1456:  ;
                   1457: 
1.47      anton    1458: count  ( c_addr1 -- c_addr2 u )        core
1.56      anton    1459: ""@i{c-addr2} is the first character and @i{u} the length of the
                   1460: counted string at @i{c-addr1}.""
1.1       anton    1461: u = *c_addr1;
                   1462: c_addr2 = c_addr1+1;
                   1463: :
                   1464:  dup 1+ swap c@ ;
                   1465: 
1.110     pazsan   1466: \g compiler
                   1467: 
1.138     pazsan   1468: \+f83headerstring
                   1469: 
                   1470: (f83find)      ( c_addr u f83name1 -- f83name2 )       new     paren_f83find
                   1471: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
                   1472:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1473:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1474:     break;
                   1475: f83name2=f83name1;
1.210     pazsan   1476: #ifdef DEBUG
                   1477: fprintf(stderr, "F83find ");
                   1478: fwrite(c_addr, u, 1, stderr);
                   1479: fprintf(stderr, " found %08x\n", f83name2); 
                   1480: #endif
1.138     pazsan   1481: :
                   1482:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
                   1483:        >r 2dup r@ cell+ char+ capscomp  0=
                   1484:        IF  2drop r>  EXIT  THEN
                   1485:        r> @
                   1486:     REPEAT  THEN  nip nip ;
                   1487: : (find-samelen) ( u f83name1 -- u f83name2/0 )
                   1488:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL  THEN ;
                   1489: : capscomp ( c_addr1 u c_addr2 -- n )
                   1490:  swap bounds
                   1491:  ?DO  dup c@ I c@ <>
                   1492:      IF  dup c@ toupper I c@ toupper =
                   1493:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1494:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1495: : sgn ( n -- -1/0/1 )
                   1496:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                   1497: 
                   1498: \-
                   1499: 
1.112     pazsan   1500: (listlfind)    ( c_addr u longname1 -- longname2 )     new     paren_listlfind
1.125     anton    1501: longname2=listlfind(c_addr, u, longname1);
1.1       anton    1502: :
1.112     pazsan   1503:     BEGIN  dup WHILE  (findl-samelen)  dup  WHILE
                   1504:        >r 2dup r@ cell+ cell+ capscomp  0=
1.1       anton    1505:        IF  2drop r>  EXIT  THEN
                   1506:        r> @
                   1507:     REPEAT  THEN  nip nip ;
1.112     pazsan   1508: : (findl-samelen) ( u longname1 -- u longname2/0 )
                   1509:     BEGIN  2dup cell+ @ lcount-mask and <> WHILE  @  dup 0= UNTIL  THEN ;
1.144     pazsan   1510: : capscomp ( c_addr1 u c_addr2 -- n )
                   1511:  swap bounds
                   1512:  ?DO  dup c@ I c@ <>
                   1513:      IF  dup c@ toupper I c@ toupper =
                   1514:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1515:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1516: : sgn ( n -- -1/0/1 )
                   1517:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1518: 
1.15      pazsan   1519: \+hash
1.1       anton    1520: 
1.112     pazsan   1521: (hashlfind)    ( c_addr u a_addr -- longname2 )        new     paren_hashlfind
1.125     anton    1522: longname2 = hashlfind(c_addr, u, a_addr);
1.1       anton    1523: :
                   1524:  BEGIN  dup  WHILE
1.112     pazsan   1525:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1526:         IF  2dup r@ cell+ cell+ capscomp 0=
1.1       anton    1527:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1528:        rdrop r>
                   1529:  REPEAT nip nip ;
                   1530: 
1.112     pazsan   1531: (tablelfind)   ( c_addr u a_addr -- longname2 )        new     paren_tablelfind
1.1       anton    1532: ""A case-sensitive variant of @code{(hashfind)}""
1.125     anton    1533: longname2 = tablelfind(c_addr, u, a_addr);
1.1       anton    1534: :
                   1535:  BEGIN  dup  WHILE
1.112     pazsan   1536:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1537:         IF  2dup r@ cell+ cell+ -text 0=
1.1       anton    1538:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1539:        rdrop r>
                   1540:  REPEAT nip nip ;
1.138     pazsan   1541: : -text ( c_addr1 u c_addr2 -- n )
                   1542:  swap bounds
                   1543:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                   1544:  ELSE  c@ I c@ - unloop  THEN  sgn ;
                   1545: : sgn ( n -- -1/0/1 )
                   1546:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1547: 
1.47      anton    1548: (hashkey1)     ( c_addr u ubits -- ukey )              gforth  paren_hashkey1
1.1       anton    1549: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
1.125     anton    1550: ukey = hashkey1(c_addr, u, ubits);
1.1       anton    1551: :
                   1552:  dup rot-values + c@ over 1 swap lshift 1- >r
                   1553:  tuck - 2swap r> 0 2swap bounds
                   1554:  ?DO  dup 4 pick lshift swap 3 pick rshift or
                   1555:       I c@ toupper xor
                   1556:       over and  LOOP
                   1557:  nip nip nip ;
                   1558: Create rot-values
                   1559:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
                   1560:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
                   1561:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
                   1562:   7 c, 5 c, 5 c,
1.138     pazsan   1563: 
                   1564: \+
1.1       anton    1565: 
1.15      pazsan   1566: \+
1.1       anton    1567: 
1.47      anton    1568: (parse-white)  ( c_addr1 u1 -- c_addr2 u2 )    gforth  paren_parse_white
1.125     anton    1569: struct Cellpair r=parse_white(c_addr1, u1);
                   1570: c_addr2 = (Char *)(r.n1);
                   1571: u2 = r.n2;
1.1       anton    1572: :
                   1573:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
                   1574:  REPEAT  THEN  2dup
                   1575:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
                   1576:  REPEAT  THEN  nip - ;
                   1577: 
1.47      anton    1578: aligned        ( c_addr -- a_addr )    core
1.29      crook    1579: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1580: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
                   1581: :
                   1582:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                   1583: 
1.47      anton    1584: faligned       ( c_addr -- f_addr )    float   f_aligned
1.29      crook    1585: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1586: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
                   1587: :
                   1588:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
                   1589: 
1.35      jwilke   1590: \ threading stuff is currently only interesting if we have a compiler
                   1591: \fhas? standardthreading has? compiler and [IF]
1.47      anton    1592: threading-method       ( -- n )        gforth  threading_method
1.1       anton    1593: ""0 if the engine is direct threaded. Note that this may change during
                   1594: the lifetime of an image.""
                   1595: #if defined(DOUBLY_INDIRECT)
                   1596: n=2;
                   1597: #else
                   1598: # if defined(DIRECT_THREADED)
                   1599: n=0;
                   1600: # else
                   1601: n=1;
                   1602: # endif
                   1603: #endif
                   1604: :
                   1605:  1 ;
1.28      jwilke   1606: 
1.35      jwilke   1607: \f[THEN]
1.1       anton    1608: 
1.83      pazsan   1609: \g hostos
                   1610: 
1.192     anton    1611: key-file       ( wfileid -- c )                gforth  paren_key_file
1.193     anton    1612: ""Read one character @i{c} from @i{wfileid}.  This word disables
                   1613: buffering for @i{wfileid}.  If you want to read characters from a
                   1614: terminal in non-canonical (raw) mode, you have to put the terminal in
                   1615: non-canonical mode yourself (using the C interface); the exception is
                   1616: @code{stdin}: Gforth automatically puts it into non-canonical mode.""
1.17      pazsan   1617: #ifdef HAS_FILE
1.1       anton    1618: fflush(stdout);
1.192     anton    1619: c = key((FILE*)wfileid);
1.17      pazsan   1620: #else
1.192     anton    1621: c = key(stdin);
1.17      pazsan   1622: #endif
1.1       anton    1623: 
1.192     anton    1624: key?-file      ( wfileid -- f )                gforth  key_q_file
                   1625: ""@i{f} is true if at least one character can be read from @i{wfileid}
1.193     anton    1626: without blocking.  If you also want to use @code{read-file} or
                   1627: @code{read-line} on the file, you have to call @code{key?-file} or
                   1628: @code{key-file} first (these two words disable buffering).""
1.17      pazsan   1629: #ifdef HAS_FILE
1.1       anton    1630: fflush(stdout);
1.192     anton    1631: f = key_query((FILE*)wfileid);
1.17      pazsan   1632: #else
1.192     anton    1633: f = key_query(stdin);
1.17      pazsan   1634: #endif
                   1635: 
1.47      anton    1636: stdin  ( -- wfileid )  gforth
1.193     anton    1637: ""The standard input file of the Gforth process.""
1.12      pazsan   1638: wfileid = (Cell)stdin;
1.1       anton    1639: 
1.47      anton    1640: stdout ( -- wfileid )  gforth
1.193     anton    1641: ""The standard output file of the Gforth process.""
1.1       anton    1642: wfileid = (Cell)stdout;
                   1643: 
1.47      anton    1644: stderr ( -- wfileid )  gforth
1.193     anton    1645: ""The standard error output file of the Gforth process.""
1.1       anton    1646: wfileid = (Cell)stderr;
                   1647: 
1.208     pazsan   1648: \+os
                   1649: 
1.47      anton    1650: form   ( -- urows ucols )      gforth
1.209     anton    1651: ""The number of lines and columns in the terminal. These numbers may
                   1652: change with the window size.  Note that it depends on the OS whether
                   1653: this reflects the actual size and changes with the window size
                   1654: (currently only on Unix-like OSs).  On other OSs you just get a
                   1655: default, and can tell Gforth the terminal size by setting the
                   1656: environment variables @code{COLUMNS} and @code{LINES} before starting
                   1657: Gforth.""
1.1       anton    1658: /* we could block SIGWINCH here to get a consistent size, but I don't
                   1659:  think this is necessary or always beneficial */
                   1660: urows=rows;
                   1661: ucols=cols;
                   1662: 
1.189     pazsan   1663: wcwidth        ( u -- n )      gforth
                   1664: ""The number of fixed-width characters per unicode character u""
                   1665: n = wcwidth(u);
                   1666: 
1.47      anton    1667: flush-icache   ( c_addr u -- ) gforth  flush_icache
1.1       anton    1668: ""Make sure that the instruction cache of the processor (if there is
1.29      crook    1669: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1.1       anton    1670: afterwards. @code{END-CODE} performs a @code{flush-icache}
                   1671: automatically. Caveat: @code{flush-icache} might not work on your
                   1672: installation; this is usually the case if direct threading is not
                   1673: supported on your machine (take a look at your @file{machine.h}) and
                   1674: your machine has a separate instruction cache. In such cases,
                   1675: @code{flush-icache} does nothing instead of flushing the instruction
                   1676: cache.""
1.233     anton    1677: FLUSH_ICACHE((caddr_t)c_addr,u);
1.1       anton    1678: 
1.47      anton    1679: (bye)  ( n -- )        gforth  paren_bye
1.77      anton    1680: SUPER_END;
1.1       anton    1681: return (Label *)n;
                   1682: 
1.125     anton    1683: (system)       ( c_addr u -- wretval wior )    gforth  paren_system
1.155     anton    1684: wretval = gforth_system(c_addr, u);  
1.1       anton    1685: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
                   1686: 
1.47      anton    1687: getenv ( c_addr1 u1 -- c_addr2 u2 )    gforth
1.29      crook    1688: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1.24      crook    1689: is the host operating system's expansion of that environment variable. If the
1.29      crook    1690: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1.24      crook    1691: in length.""
1.46      pazsan   1692: /* close ' to keep fontify happy */
1.190     pazsan   1693: c_addr2 = (Char *)getenv(cstr(c_addr1,u1,1));
                   1694: u2 = (c_addr2 == NULL ? 0 : strlen((char *)c_addr2));
1.1       anton    1695: 
1.56      anton    1696: open-pipe      ( c_addr u wfam -- wfileid wior )       gforth  open_pipe
1.84      pazsan   1697: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1.1       anton    1698: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
                   1699: 
1.47      anton    1700: close-pipe     ( wfileid -- wretval wior )             gforth  close_pipe
1.1       anton    1701: wretval = pclose((FILE *)wfileid);
                   1702: wior = IOR(wretval==-1);
                   1703: 
1.47      anton    1704: time&date      ( -- nsec nmin nhour nday nmonth nyear )        facility-ext    time_and_date
1.44      crook    1705: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
                   1706: Months are numbered from 1.""
1.127     anton    1707: #if 1
                   1708: time_t now;
                   1709: struct tm *ltime;
                   1710: time(&now);
                   1711: ltime=localtime(&now);
                   1712: #else
1.1       anton    1713: struct timeval time1;
                   1714: struct timezone zone1;
                   1715: struct tm *ltime;
                   1716: gettimeofday(&time1,&zone1);
1.51      anton    1717: /* !! Single Unix specification: 
                   1718:    If tzp is not a null pointer, the behaviour is unspecified. */
1.1       anton    1719: ltime=localtime((time_t *)&time1.tv_sec);
1.127     anton    1720: #endif
1.1       anton    1721: nyear =ltime->tm_year+1900;
                   1722: nmonth=ltime->tm_mon+1;
                   1723: nday  =ltime->tm_mday;
                   1724: nhour =ltime->tm_hour;
                   1725: nmin  =ltime->tm_min;
                   1726: nsec  =ltime->tm_sec;
                   1727: 
1.212     anton    1728: ms     ( u -- )        facility-ext
1.44      crook    1729: ""Wait at least @i{n} milli-second.""
1.212     anton    1730: gforth_ms(u);
1.1       anton    1731: 
1.47      anton    1732: allocate       ( u -- a_addr wior )    memory
1.29      crook    1733: ""Allocate @i{u} address units of contiguous data space. The initial
1.27      crook    1734: contents of the data space is undefined. If the allocation is successful,
1.29      crook    1735: @i{a-addr} is the start address of the allocated region and @i{wior}
                   1736: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1.52      anton    1737: is a non-zero I/O result code.""
1.1       anton    1738: a_addr = (Cell *)malloc(u?u:1);
                   1739: wior = IOR(a_addr==NULL);
                   1740: 
1.47      anton    1741: free   ( a_addr -- wior )              memory
1.29      crook    1742: ""Return the region of data space starting at @i{a-addr} to the system.
1.52      anton    1743: The region must originally have been obtained using @code{allocate} or
1.29      crook    1744: @code{resize}. If the operational is successful, @i{wior} is 0.
1.52      anton    1745: If the operation fails, @i{wior} is a non-zero I/O result code.""
1.1       anton    1746: free(a_addr);
                   1747: wior = 0;
                   1748: 
1.47      anton    1749: resize ( a_addr1 u -- a_addr2 wior )   memory
1.26      crook    1750: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1.1       anton    1751: address units, possibly moving the contents to a different
1.27      crook    1752: area. @i{a-addr2} is the address of the resulting area.
1.52      anton    1753: If the operation is successful, @i{wior} is 0.
                   1754: If the operation fails, @i{wior} is a non-zero
1.29      crook    1755: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1.27      crook    1756: @code{resize} @code{allocate}s @i{u} address units.""
1.1       anton    1757: /* the following check is not necessary on most OSs, but it is needed
                   1758:    on SunOS 4.1.2. */
1.46      pazsan   1759: /* close ' to keep fontify happy */
1.1       anton    1760: if (a_addr1==NULL)
                   1761:   a_addr2 = (Cell *)malloc(u);
                   1762: else
                   1763:   a_addr2 = (Cell *)realloc(a_addr1, u);
                   1764: wior = IOR(a_addr2==NULL);     /* !! Define a return code */
                   1765: 
1.47      anton    1766: strerror       ( n -- c_addr u )       gforth
1.190     pazsan   1767: c_addr = (Char *)strerror(n);
                   1768: u = strlen((char *)c_addr);
1.1       anton    1769: 
1.47      anton    1770: strsignal      ( n -- c_addr u )       gforth
1.190     pazsan   1771: c_addr = (Char *)strsignal(n);
                   1772: u = strlen((char *)c_addr);
1.1       anton    1773: 
1.172     anton    1774: call-c ( ... w -- ... )        gforth  call_c
1.1       anton    1775: ""Call the C function pointed to by @i{w}. The C function has to
                   1776: access the stack itself. The stack pointers are exported in the global
1.213     anton    1777: variables @code{gforth_SP} and @code{gforth_FP}.""
1.1       anton    1778: /* This is a first attempt at support for calls to C. This may change in
                   1779:    the future */
1.231     pazsan   1780: IF_fpTOS(fp[0]=fpTOS);
1.185     pazsan   1781: gforth_FP=fp;
                   1782: gforth_SP=sp;
1.231     pazsan   1783: gforth_RP=rp;
                   1784: gforth_LP=lp;
1.235     pazsan   1785: #ifdef HAS_LINKBACK
1.1       anton    1786: ((void (*)())w)();
1.235     pazsan   1787: #else
                   1788: ((void (*)(void *))w)(gforth_pointers);
                   1789: #endif
1.185     pazsan   1790: sp=gforth_SP;
                   1791: fp=gforth_FP;
1.231     pazsan   1792: rp=gforth_RP;
                   1793: lp=gforth_LP;
                   1794: IF_fpTOS(fpTOS=fp[0]);
1.1       anton    1795: 
1.15      pazsan   1796: \+
                   1797: \+file
1.1       anton    1798: 
1.47      anton    1799: close-file     ( wfileid -- wior )             file    close_file
1.1       anton    1800: wior = IOR(fclose((FILE *)wfileid)==EOF);
                   1801: 
1.56      anton    1802: open-file      ( c_addr u wfam -- wfileid wior )       file    open_file
1.217     anton    1803: wfileid = opencreate_file(tilde_cstr(c_addr,u,1), wfam, 0, &wior);
1.1       anton    1804: 
1.56      anton    1805: create-file    ( c_addr u wfam -- wfileid wior )       file    create_file
1.217     anton    1806: wfileid = opencreate_file(tilde_cstr(c_addr,u,1), wfam, O_CREAT|O_TRUNC, &wior);
1.1       anton    1807: 
1.47      anton    1808: delete-file    ( c_addr u -- wior )            file    delete_file
1.1       anton    1809: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
                   1810: 
1.47      anton    1811: rename-file    ( c_addr1 u1 c_addr2 u2 -- wior )       file-ext        rename_file
1.29      crook    1812: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1.125     anton    1813: wior = rename_file(c_addr1, u1, c_addr2, u2);
1.1       anton    1814: 
1.47      anton    1815: file-position  ( wfileid -- ud wior )  file    file_position
1.1       anton    1816: /* !! use tell and lseek? */
1.108     anton    1817: ud = OFF2UD(ftello((FILE *)wfileid));
                   1818: wior = IOR(UD2OFF(ud)==-1);
1.1       anton    1819: 
1.47      anton    1820: reposition-file        ( ud wfileid -- wior )  file    reposition_file
1.108     anton    1821: wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1.1       anton    1822: 
1.47      anton    1823: file-size      ( wfileid -- ud wior )  file    file_size
1.1       anton    1824: struct stat buf;
                   1825: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1.108     anton    1826: ud = OFF2UD(buf.st_size);
1.1       anton    1827: 
1.47      anton    1828: resize-file    ( ud wfileid -- wior )  file    resize_file
1.108     anton    1829: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1.1       anton    1830: 
1.47      anton    1831: read-file      ( c_addr u1 wfileid -- u2 wior )        file    read_file
1.1       anton    1832: /* !! fread does not guarantee enough */
                   1833: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1834: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1835: /* !! is the value of ferror errno-compatible? */
                   1836: if (wior)
                   1837:   clearerr((FILE *)wfileid);
                   1838: 
1.125     anton    1839: (read-line)    ( c_addr u1 wfileid -- u2 flag u3 wior ) file   paren_read_line
                   1840: struct Cellquad r = read_line(c_addr, u1, wfileid);
                   1841: u2   = r.n1;
                   1842: flag = r.n2;
                   1843: u3   = r.n3;
                   1844: wior = r.n4;
1.1       anton    1845: 
1.15      pazsan   1846: \+
1.1       anton    1847: 
1.47      anton    1848: write-file     ( c_addr u1 wfileid -- wior )   file    write_file
1.1       anton    1849: /* !! fwrite does not guarantee enough */
1.39      pazsan   1850: #ifdef HAS_FILE
1.1       anton    1851: {
                   1852:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1853:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1854:   if (wior)
                   1855:     clearerr((FILE *)wfileid);
                   1856: }
1.39      pazsan   1857: #else
                   1858: TYPE(c_addr, u1);
                   1859: #endif
1.17      pazsan   1860: 
1.47      anton    1861: emit-file      ( c wfileid -- wior )   gforth  emit_file
1.17      pazsan   1862: #ifdef HAS_FILE
1.1       anton    1863: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
                   1864: if (wior)
                   1865:   clearerr((FILE *)wfileid);
1.17      pazsan   1866: #else
1.36      pazsan   1867: PUTC(c);
1.17      pazsan   1868: #endif
1.1       anton    1869: 
1.15      pazsan   1870: \+file
1.1       anton    1871: 
1.47      anton    1872: flush-file     ( wfileid -- wior )             file-ext        flush_file
1.1       anton    1873: wior = IOR(fflush((FILE *) wfileid)==EOF);
                   1874: 
1.56      anton    1875: file-status    ( c_addr u -- wfam wior )       file-ext        file_status
1.125     anton    1876: struct Cellpair r = file_status(c_addr, u);
                   1877: wfam = r.n1;
                   1878: wior = r.n2;
1.1       anton    1879: 
1.112     pazsan   1880: file-eof?      ( wfileid -- flag )     gforth  file_eof_query
                   1881: flag = FLAG(feof((FILE *) wfileid));
1.1       anton    1882: 
1.112     pazsan   1883: open-dir       ( c_addr u -- wdirid wior )     gforth  open_dir
                   1884: ""Open the directory specified by @i{c-addr, u}
                   1885: and return @i{dir-id} for futher access to it.""
                   1886: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
                   1887: wior =  IOR(wdirid == 0);
                   1888: 
                   1889: read-dir       ( c_addr u1 wdirid -- u2 flag wior )    gforth  read_dir
                   1890: ""Attempt to read the next entry from the directory specified
                   1891: by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}. 
                   1892: If the attempt fails because there is no more entries,
                   1893: @i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
                   1894: If the attempt to read the next entry fails because of any other reason, 
                   1895: return @i{ior}<>0.
                   1896: If the attempt succeeds, store file name to the buffer at @i{c-addr}
                   1897: and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
                   1898: If the length of the file name is greater than @i{u1}, 
                   1899: store first @i{u1} characters from file name into the buffer and
                   1900: indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
                   1901: struct dirent * dent;
                   1902: dent = readdir((DIR *)wdirid);
                   1903: wior = 0;
                   1904: flag = -1;
                   1905: if(dent == NULL) {
                   1906:   u2 = 0;
                   1907:   flag = 0;
                   1908: } else {
1.190     pazsan   1909:   u2 = strlen((char *)dent->d_name);
1.112     pazsan   1910:   if(u2 > u1) {
                   1911:     u2 = u1;
                   1912:     wior = -512-ENAMETOOLONG;
                   1913:   }
                   1914:   memmove(c_addr, dent->d_name, u2);
                   1915: }
                   1916: 
                   1917: close-dir      ( wdirid -- wior )      gforth  close_dir
                   1918: ""Close the directory specified by @i{dir-id}.""
                   1919: wior = IOR(closedir((DIR *)wdirid));
                   1920: 
                   1921: filename-match ( c_addr1 u1 c_addr2 u2 -- flag )       gforth  match_file
                   1922: char * string = cstr(c_addr1, u1, 1);
                   1923: char * pattern = cstr(c_addr2, u2, 0);
                   1924: flag = FLAG(!fnmatch(pattern, string, 0));
                   1925: 
1.157     pazsan   1926: set-dir        ( c_addr u -- wior )    gforth set_dir
                   1927: ""Change the current directory to @i{c-addr, u}.
                   1928: Return an error if this is not possible""
                   1929: wior = IOR(chdir(tilde_cstr(c_addr, u, 1)));
                   1930: 
                   1931: get-dir        ( c_addr1 u1 -- c_addr2 u2 )    gforth get_dir
1.236     anton    1932: ""Store the current directory in the buffer specified by @i{c-addr1, u1}.
1.157     pazsan   1933: If the buffer size is not sufficient, return 0 0""
1.190     pazsan   1934: c_addr2 = (Char *)getcwd((char *)c_addr1, u1);
1.157     pazsan   1935: if(c_addr2 != NULL) {
1.190     pazsan   1936:   u2 = strlen((char *)c_addr2);
1.157     pazsan   1937: } else {
                   1938:   u2 = 0;
                   1939: }
                   1940: 
1.236     anton    1941: =mkdir ( c_addr u wmode -- wior )        gforth equals_mkdir
                   1942: ""Create directory @i{c-addr u} with mode @i{wmode}.""
                   1943: wior = IOR(mkdir(tilde_cstr(c_addr,u,1),wmode));
                   1944: 
1.112     pazsan   1945: \+
                   1946: 
                   1947: newline        ( -- c_addr u ) gforth
                   1948: ""String containing the newline sequence of the host OS""
                   1949: char newline[] = {
1.115     anton    1950: #if DIRSEP=='/'
                   1951: /* Unix */
1.112     pazsan   1952: '\n'
                   1953: #else
1.115     anton    1954: /* DOS, Win, OS/2 */
1.112     pazsan   1955: '\r','\n'
                   1956: #endif
                   1957: };
1.190     pazsan   1958: c_addr=(Char *)newline;
1.112     pazsan   1959: u=sizeof(newline);
                   1960: :
                   1961:  "newline count ;
                   1962: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
                   1963: 
                   1964: \+os
                   1965: 
                   1966: utime  ( -- dtime )    gforth
                   1967: ""Report the current time in microseconds since some epoch.""
                   1968: struct timeval time1;
                   1969: gettimeofday(&time1,NULL);
                   1970: dtime = timeval2us(&time1);
                   1971: 
                   1972: cputime ( -- duser dsystem ) gforth
                   1973: ""duser and dsystem are the respective user- and system-level CPU
                   1974: times used since the start of the Forth system (excluding child
                   1975: processes), in microseconds (the granularity may be much larger,
                   1976: however).  On platforms without the getrusage call, it reports elapsed
                   1977: time (since some epoch) for duser and 0 for dsystem.""
                   1978: #ifdef HAVE_GETRUSAGE
                   1979: struct rusage usage;
                   1980: getrusage(RUSAGE_SELF, &usage);
                   1981: duser = timeval2us(&usage.ru_utime);
                   1982: dsystem = timeval2us(&usage.ru_stime);
                   1983: #else
                   1984: struct timeval time1;
                   1985: gettimeofday(&time1,NULL);
                   1986: duser = timeval2us(&time1);
1.158     pazsan   1987: dsystem = DZERO;
1.112     pazsan   1988: #endif
                   1989: 
                   1990: \+
                   1991: 
                   1992: \+floating
                   1993: 
                   1994: \g floating
1.83      pazsan   1995: 
1.1       anton    1996: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
                   1997: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
                   1998: 
1.177     pazsan   1999: s>f    ( n -- r )              float   s_to_f
                   2000: r = n;
                   2001: 
1.47      anton    2002: d>f    ( d -- r )              float   d_to_f
1.158     pazsan   2003: #ifdef BUGGY_LL_D2F
1.1       anton    2004: extern double ldexp(double x, int exp);
1.158     pazsan   2005: if (DHI(d)<0) {
                   2006: #ifdef BUGGY_LL_ADD
1.113     anton    2007:   DCell d2=dnegate(d);
1.158     pazsan   2008: #else
                   2009:   DCell d2=-d;
                   2010: #endif
                   2011:   r = -(ldexp((Float)DHI(d2),CELL_BITS) + (Float)DLO(d2));
1.113     anton    2012: } else
1.158     pazsan   2013:   r = ldexp((Float)DHI(d),CELL_BITS) + (Float)DLO(d);
1.1       anton    2014: #else
                   2015: r = d;
                   2016: #endif
                   2017: 
1.47      anton    2018: f>d    ( r -- d )              float   f_to_d
1.100     pazsan   2019: extern DCell double2ll(Float r);
                   2020: d = double2ll(r);
1.1       anton    2021: 
1.177     pazsan   2022: f>s    ( r -- n )              float   f_to_s
                   2023: n = (Cell)r;
                   2024: 
1.47      anton    2025: f!     ( r f_addr -- ) float   f_store
1.52      anton    2026: ""Store @i{r} into the float at address @i{f-addr}.""
1.1       anton    2027: *f_addr = r;
                   2028: 
1.47      anton    2029: f@     ( f_addr -- r ) float   f_fetch
1.52      anton    2030: ""@i{r} is the float at address @i{f-addr}.""
1.1       anton    2031: r = *f_addr;
                   2032: 
1.47      anton    2033: df@    ( df_addr -- r )        float-ext       d_f_fetch
1.52      anton    2034: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1.1       anton    2035: #ifdef IEEE_FP
                   2036: r = *df_addr;
                   2037: #else
                   2038: !! df@
                   2039: #endif
                   2040: 
1.47      anton    2041: df!    ( r df_addr -- )        float-ext       d_f_store
1.52      anton    2042: ""Store @i{r} as double-precision IEEE floating-point value to the
                   2043: address @i{df-addr}.""
1.1       anton    2044: #ifdef IEEE_FP
                   2045: *df_addr = r;
                   2046: #else
                   2047: !! df!
                   2048: #endif
                   2049: 
1.47      anton    2050: sf@    ( sf_addr -- r )        float-ext       s_f_fetch
1.52      anton    2051: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1.1       anton    2052: #ifdef IEEE_FP
                   2053: r = *sf_addr;
                   2054: #else
                   2055: !! sf@
                   2056: #endif
                   2057: 
1.47      anton    2058: sf!    ( r sf_addr -- )        float-ext       s_f_store
1.52      anton    2059: ""Store @i{r} as single-precision IEEE floating-point value to the
                   2060: address @i{sf-addr}.""
1.1       anton    2061: #ifdef IEEE_FP
                   2062: *sf_addr = r;
                   2063: #else
                   2064: !! sf!
                   2065: #endif
                   2066: 
1.47      anton    2067: f+     ( r1 r2 -- r3 ) float   f_plus
1.1       anton    2068: r3 = r1+r2;
                   2069: 
1.47      anton    2070: f-     ( r1 r2 -- r3 ) float   f_minus
1.1       anton    2071: r3 = r1-r2;
                   2072: 
1.47      anton    2073: f*     ( r1 r2 -- r3 ) float   f_star
1.1       anton    2074: r3 = r1*r2;
                   2075: 
1.47      anton    2076: f/     ( r1 r2 -- r3 ) float   f_slash
1.1       anton    2077: r3 = r1/r2;
                   2078: 
1.47      anton    2079: f**    ( r1 r2 -- r3 ) float-ext       f_star_star
1.26      crook    2080: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1.1       anton    2081: r3 = pow(r1,r2);
1.177     pazsan   2082: 
                   2083: fm*    ( r1 n -- r2 )  gforth  fm_star
                   2084: r2 = r1*n;
                   2085: 
                   2086: fm/    ( r1 n -- r2 )  gforth  fm_slash
                   2087: r2 = r1/n;
                   2088: 
                   2089: fm*/   ( r1 n1 n2 -- r2 )      gforth  fm_star_slash
                   2090: r2 = (r1*n1)/n2;
                   2091: 
                   2092: f**2   ( r1 -- r2 )    gforth  fm_square
                   2093: r2 = r1*r1;
1.1       anton    2094: 
1.47      anton    2095: fnegate        ( r1 -- r2 )    float   f_negate
1.1       anton    2096: r2 = - r1;
                   2097: 
1.47      anton    2098: fdrop  ( r -- )                float   f_drop
1.1       anton    2099: 
1.47      anton    2100: fdup   ( r -- r r )    float   f_dupe
1.1       anton    2101: 
1.47      anton    2102: fswap  ( r1 r2 -- r2 r1 )      float   f_swap
1.1       anton    2103: 
1.47      anton    2104: fover  ( r1 r2 -- r1 r2 r1 )   float   f_over
1.1       anton    2105: 
1.47      anton    2106: frot   ( r1 r2 r3 -- r2 r3 r1 )        float   f_rote
1.1       anton    2107: 
1.47      anton    2108: fnip   ( r1 r2 -- r2 ) gforth  f_nip
1.1       anton    2109: 
1.47      anton    2110: ftuck  ( r1 r2 -- r2 r1 r2 )   gforth  f_tuck
1.1       anton    2111: 
1.47      anton    2112: float+ ( f_addr1 -- f_addr2 )  float   float_plus
1.52      anton    2113: ""@code{1 floats +}.""
1.1       anton    2114: f_addr2 = f_addr1+1;
                   2115: 
1.47      anton    2116: floats ( n1 -- n2 )    float
1.52      anton    2117: ""@i{n2} is the number of address units of @i{n1} floats.""
1.1       anton    2118: n2 = n1*sizeof(Float);
                   2119: 
1.47      anton    2120: floor  ( r1 -- r2 )    float
1.26      crook    2121: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1.1       anton    2122: /* !! unclear wording */
                   2123: r2 = floor(r1);
                   2124: 
1.216     anton    2125: fround ( r1 -- r2 )    float   f_round
1.105     anton    2126: ""Round to the nearest integral value.""
1.1       anton    2127: r2 = rint(r1);
                   2128: 
1.47      anton    2129: fmax   ( r1 r2 -- r3 ) float   f_max
1.1       anton    2130: if (r1<r2)
                   2131:   r3 = r2;
                   2132: else
                   2133:   r3 = r1;
                   2134: 
1.47      anton    2135: fmin   ( r1 r2 -- r3 ) float   f_min
1.1       anton    2136: if (r1<r2)
                   2137:   r3 = r1;
                   2138: else
                   2139:   r3 = r2;
                   2140: 
1.47      anton    2141: represent      ( r c_addr u -- n f1 f2 )       float
1.1       anton    2142: char *sig;
1.122     anton    2143: size_t siglen;
1.1       anton    2144: int flag;
                   2145: int decpt;
                   2146: sig=ecvt(r, u, &decpt, &flag);
1.122     anton    2147: n=(r==0. ? 1 : decpt);
1.1       anton    2148: f1=FLAG(flag!=0);
1.21      anton    2149: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1.190     pazsan   2150: siglen=strlen((char *)sig);
1.124     anton    2151: if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
                   2152:   siglen=u;
1.170     anton    2153: if (!f2) /* workaround Cygwin trailing 0s for Inf and Nan */
                   2154:   for (; sig[siglen-1]=='0'; siglen--);
                   2155:     ;
1.122     anton    2156: memcpy(c_addr,sig,siglen);
1.123     anton    2157: memset(c_addr+siglen,f2?'0':' ',u-siglen);
1.1       anton    2158: 
1.172     anton    2159: >float ( c_addr u -- f:... flag )      float   to_float
1.56      anton    2160: ""Actual stack effect: ( c_addr u -- r t | f ).  Attempt to convert the
                   2161: character string @i{c-addr u} to internal floating-point
                   2162: representation. If the string represents a valid floating-point number
                   2163: @i{r} is placed on the floating-point stack and @i{flag} is
                   2164: true. Otherwise, @i{flag} is false. A string of blanks is a special
                   2165: case and represents the floating-point number 0.""
1.1       anton    2166: Float r;
1.125     anton    2167: flag = to_float(c_addr, u, &r);
                   2168: if (flag) {
1.172     anton    2169:   fp--;
                   2170:   fp[0]=r;
1.1       anton    2171: }
                   2172: 
1.47      anton    2173: fabs   ( r1 -- r2 )    float-ext       f_abs
1.1       anton    2174: r2 = fabs(r1);
                   2175: 
1.47      anton    2176: facos  ( r1 -- r2 )    float-ext       f_a_cos
1.1       anton    2177: r2 = acos(r1);
                   2178: 
1.47      anton    2179: fasin  ( r1 -- r2 )    float-ext       f_a_sine
1.1       anton    2180: r2 = asin(r1);
                   2181: 
1.47      anton    2182: fatan  ( r1 -- r2 )    float-ext       f_a_tan
1.1       anton    2183: r2 = atan(r1);
                   2184: 
1.47      anton    2185: fatan2 ( r1 r2 -- r3 ) float-ext       f_a_tan_two
1.26      crook    2186: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1.1       anton    2187: intends this to be the inverse of @code{fsincos}. In gforth it is.""
                   2188: r3 = atan2(r1,r2);
                   2189: 
1.47      anton    2190: fcos   ( r1 -- r2 )    float-ext       f_cos
1.1       anton    2191: r2 = cos(r1);
                   2192: 
1.47      anton    2193: fexp   ( r1 -- r2 )    float-ext       f_e_x_p
1.1       anton    2194: r2 = exp(r1);
                   2195: 
1.47      anton    2196: fexpm1 ( r1 -- r2 )    float-ext       f_e_x_p_m_one
1.1       anton    2197: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
                   2198: #ifdef HAVE_EXPM1
1.3       pazsan   2199: extern double
                   2200: #ifdef NeXT
                   2201:               const
                   2202: #endif
                   2203:                     expm1(double);
1.1       anton    2204: r2 = expm1(r1);
                   2205: #else
                   2206: r2 = exp(r1)-1.;
                   2207: #endif
                   2208: 
1.47      anton    2209: fln    ( r1 -- r2 )    float-ext       f_l_n
1.1       anton    2210: r2 = log(r1);
                   2211: 
1.47      anton    2212: flnp1  ( r1 -- r2 )    float-ext       f_l_n_p_one
1.1       anton    2213: ""@i{r2}=ln(@i{r1}+1)""
                   2214: #ifdef HAVE_LOG1P
1.3       pazsan   2215: extern double
                   2216: #ifdef NeXT
                   2217:               const
                   2218: #endif
                   2219:                     log1p(double);
1.1       anton    2220: r2 = log1p(r1);
                   2221: #else
                   2222: r2 = log(r1+1.);
                   2223: #endif
                   2224: 
1.47      anton    2225: flog   ( r1 -- r2 )    float-ext       f_log
1.26      crook    2226: ""The decimal logarithm.""
1.1       anton    2227: r2 = log10(r1);
                   2228: 
1.47      anton    2229: falog  ( r1 -- r2 )    float-ext       f_a_log
1.1       anton    2230: ""@i{r2}=10**@i{r1}""
                   2231: extern double pow10(double);
                   2232: r2 = pow10(r1);
                   2233: 
1.47      anton    2234: fsin   ( r1 -- r2 )    float-ext       f_sine
1.1       anton    2235: r2 = sin(r1);
                   2236: 
1.47      anton    2237: fsincos        ( r1 -- r2 r3 ) float-ext       f_sine_cos
1.1       anton    2238: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
                   2239: r2 = sin(r1);
                   2240: r3 = cos(r1);
                   2241: 
1.47      anton    2242: fsqrt  ( r1 -- r2 )    float-ext       f_square_root
1.1       anton    2243: r2 = sqrt(r1);
                   2244: 
1.47      anton    2245: ftan   ( r1 -- r2 )    float-ext       f_tan
1.1       anton    2246: r2 = tan(r1);
                   2247: :
                   2248:  fsincos f/ ;
                   2249: 
1.47      anton    2250: fsinh  ( r1 -- r2 )    float-ext       f_cinch
1.1       anton    2251: r2 = sinh(r1);
                   2252: :
                   2253:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
                   2254: 
1.47      anton    2255: fcosh  ( r1 -- r2 )    float-ext       f_cosh
1.1       anton    2256: r2 = cosh(r1);
                   2257: :
                   2258:  fexp fdup 1/f f+ f2/ ;
                   2259: 
1.47      anton    2260: ftanh  ( r1 -- r2 )    float-ext       f_tan_h
1.1       anton    2261: r2 = tanh(r1);
                   2262: :
                   2263:  f2* fexpm1 fdup 2. d>f f+ f/ ;
                   2264: 
1.47      anton    2265: fasinh ( r1 -- r2 )    float-ext       f_a_cinch
1.1       anton    2266: r2 = asinh(r1);
                   2267: :
                   2268:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
                   2269: 
1.47      anton    2270: facosh ( r1 -- r2 )    float-ext       f_a_cosh
1.1       anton    2271: r2 = acosh(r1);
                   2272: :
                   2273:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
                   2274: 
1.47      anton    2275: fatanh ( r1 -- r2 )    float-ext       f_a_tan_h
1.1       anton    2276: r2 = atanh(r1);
                   2277: :
                   2278:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
                   2279:  r> IF  fnegate  THEN ;
                   2280: 
1.47      anton    2281: sfloats        ( n1 -- n2 )    float-ext       s_floats
1.52      anton    2282: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2283: single-precision IEEE floating-point numbers.""
1.1       anton    2284: n2 = n1*sizeof(SFloat);
                   2285: 
1.47      anton    2286: dfloats        ( n1 -- n2 )    float-ext       d_floats
1.52      anton    2287: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2288: double-precision IEEE floating-point numbers.""
1.1       anton    2289: n2 = n1*sizeof(DFloat);
                   2290: 
1.47      anton    2291: sfaligned      ( c_addr -- sf_addr )   float-ext       s_f_aligned
1.52      anton    2292: ""@i{sf-addr} is the first single-float-aligned address greater
1.29      crook    2293: than or equal to @i{c-addr}.""
1.1       anton    2294: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
                   2295: :
                   2296:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
                   2297: 
1.47      anton    2298: dfaligned      ( c_addr -- df_addr )   float-ext       d_f_aligned
1.52      anton    2299: ""@i{df-addr} is the first double-float-aligned address greater
1.29      crook    2300: than or equal to @i{c-addr}.""
1.1       anton    2301: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
                   2302: :
                   2303:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
                   2304: 
1.112     pazsan   2305: v*     ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
                   2306: ""dot-product: r=v1*v2.  The first element of v1 is at f_addr1, the
                   2307: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
                   2308: ucount elements.""
1.125     anton    2309: r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
1.112     pazsan   2310: :
                   2311:  >r swap 2swap swap 0e r> 0 ?DO
                   2312:      dup f@ over + 2swap dup f@ f* f+ over + 2swap
                   2313:  LOOP 2drop 2drop ; 
                   2314: 
                   2315: faxpy  ( ra f_x nstridex f_y nstridey ucount -- )      gforth
                   2316: ""vy=ra*vx+vy""
1.125     anton    2317: faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
1.112     pazsan   2318: :
                   2319:  >r swap 2swap swap r> 0 ?DO
                   2320:      fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
                   2321:  LOOP 2drop 2drop fdrop ;
                   2322: 
                   2323: \+
                   2324: 
1.1       anton    2325: \ The following words access machine/OS/installation-dependent
                   2326: \   Gforth internals
                   2327: \ !! how about environmental queries DIRECT-THREADED,
                   2328: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
                   2329: 
                   2330: \ local variable implementation primitives
1.112     pazsan   2331: 
1.15      pazsan   2332: \+glocals
1.1       anton    2333: 
1.110     pazsan   2334: \g locals
                   2335: 
1.68      anton    2336: @local#        ( #noffset -- w )       gforth  fetch_local_number
                   2337: w = *(Cell *)(lp+noffset);
1.1       anton    2338: 
1.47      anton    2339: @local0        ( -- w )        new     fetch_local_zero
1.112     pazsan   2340: w = ((Cell *)lp)[0];
1.1       anton    2341: 
1.47      anton    2342: @local1        ( -- w )        new     fetch_local_four
1.112     pazsan   2343: w = ((Cell *)lp)[1];
1.1       anton    2344: 
1.47      anton    2345: @local2        ( -- w )        new     fetch_local_eight
1.112     pazsan   2346: w = ((Cell *)lp)[2];
1.1       anton    2347: 
1.47      anton    2348: @local3        ( -- w )        new     fetch_local_twelve
1.112     pazsan   2349: w = ((Cell *)lp)[3];
1.1       anton    2350: 
1.15      pazsan   2351: \+floating
1.1       anton    2352: 
1.68      anton    2353: f@local#       ( #noffset -- r )       gforth  f_fetch_local_number
                   2354: r = *(Float *)(lp+noffset);
1.1       anton    2355: 
1.47      anton    2356: f@local0       ( -- r )        new     f_fetch_local_zero
1.112     pazsan   2357: r = ((Float *)lp)[0];
1.1       anton    2358: 
1.47      anton    2359: f@local1       ( -- r )        new     f_fetch_local_eight
1.112     pazsan   2360: r = ((Float *)lp)[1];
1.1       anton    2361: 
1.15      pazsan   2362: \+
1.1       anton    2363: 
1.68      anton    2364: laddr# ( #noffset -- c_addr )  gforth  laddr_number
1.1       anton    2365: /* this can also be used to implement lp@ */
1.68      anton    2366: c_addr = (Char *)(lp+noffset);
1.1       anton    2367: 
1.68      anton    2368: lp+!#  ( #noffset -- ) gforth  lp_plus_store_number
1.1       anton    2369: ""used with negative immediate values it allocates memory on the
                   2370: local stack, a positive immediate argument drops memory from the local
                   2371: stack""
1.68      anton    2372: lp += noffset;
1.1       anton    2373: 
1.47      anton    2374: lp-    ( -- )  new     minus_four_lp_plus_store
1.1       anton    2375: lp += -sizeof(Cell);
                   2376: 
1.47      anton    2377: lp+    ( -- )  new     eight_lp_plus_store
1.1       anton    2378: lp += sizeof(Float);
                   2379: 
1.47      anton    2380: lp+2   ( -- )  new     sixteen_lp_plus_store
1.1       anton    2381: lp += 2*sizeof(Float);
                   2382: 
1.47      anton    2383: lp!    ( c_addr -- )   gforth  lp_store
1.1       anton    2384: lp = (Address)c_addr;
                   2385: 
1.47      anton    2386: >l     ( w -- )        gforth  to_l
1.1       anton    2387: lp -= sizeof(Cell);
                   2388: *(Cell *)lp = w;
                   2389: 
1.15      pazsan   2390: \+floating
1.1       anton    2391: 
1.47      anton    2392: f>l    ( r -- )        gforth  f_to_l
1.1       anton    2393: lp -= sizeof(Float);
                   2394: *(Float *)lp = r;
                   2395: 
1.172     anton    2396: fpick  ( f:... u -- f:... r )          gforth
1.52      anton    2397: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
1.172     anton    2398: r = fp[u];
1.11      anton    2399: :
                   2400:  floats fp@ + f@ ;
                   2401: 
1.15      pazsan   2402: \+
                   2403: \+
1.1       anton    2404: 
1.15      pazsan   2405: \+OS
1.1       anton    2406: 
1.110     pazsan   2407: \g syslib
                   2408: 
1.131     pazsan   2409: open-lib       ( c_addr1 u1 -- u2 )    gforth  open_lib
1.237   ! pazsan   2410: u2 = gforth_dlopen(c_addr1, u1);
1.131     pazsan   2411: 
                   2412: lib-sym        ( c_addr1 u1 u2 -- u3 ) gforth  lib_sym
1.234     anton    2413: #ifdef HAVE_LIBLTDL
1.220     anton    2414: u3 = (UCell) lt_dlsym((lt_dlhandle)u2, cstr(c_addr1, u1, 1));
                   2415: #elif defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
1.131     pazsan   2416: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
                   2417: #else
                   2418: #  ifdef _WIN32
                   2419: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
                   2420: #  else
                   2421: #warning Define lib-sym!
                   2422: u3 = 0;
                   2423: #  endif
                   2424: #endif
                   2425: 
1.172     anton    2426: wcall  ( ... u -- ... )        gforth
1.185     pazsan   2427: gforth_FP=fp;
                   2428: sp=(Cell*)(SYSCALL(Cell*(*)(Cell *, void *))u)(sp, &gforth_FP);
                   2429: fp=gforth_FP;
1.142     pazsan   2430: 
1.186     anton    2431: uw@ ( c_addr -- u )    gforth u_w_fetch
                   2432: ""@i{u} is the zero-extended 16-bit value stored at @i{c_addr}.""
                   2433: u = *(UWyde*)(c_addr);
1.180     pazsan   2434: 
1.186     anton    2435: sw@ ( c_addr -- n )    gforth s_w_fetch
                   2436: ""@i{n} is the sign-extended 16-bit value stored at @i{c_addr}.""
                   2437: n = *(Wyde*)(c_addr);
1.180     pazsan   2438: 
1.186     anton    2439: w! ( w c_addr -- )     gforth w_store
                   2440: ""Store the bottom 16 bits of @i{w} at @i{c_addr}.""
                   2441: *(Wyde*)(c_addr) = w;
1.180     pazsan   2442: 
1.186     anton    2443: ul@ ( c_addr -- u )    gforth u_l_fetch
                   2444: ""@i{u} is the zero-extended 32-bit value stored at @i{c_addr}.""
                   2445: u = *(UTetrabyte*)(c_addr);
1.181     pazsan   2446: 
1.186     anton    2447: sl@ ( c_addr -- n )    gforth s_l_fetch
                   2448: ""@i{n} is the sign-extended 32-bit value stored at @i{c_addr}.""
                   2449: n = *(Tetrabyte*)(c_addr);
1.181     pazsan   2450: 
1.186     anton    2451: l! ( w c_addr -- )     gforth l_store
                   2452: ""Store the bottom 32 bits of @i{w} at @i{c_addr}.""
                   2453: *(Tetrabyte*)(c_addr) = w;
1.180     pazsan   2454: 
1.220     anton    2455: lib-error ( -- c_addr u )       gforth  lib_error
1.228     anton    2456: ""Error message for last failed @code{open-lib} or @code{lib-sym}.""
1.234     anton    2457: #ifdef HAVE_LIBLTDL
1.232     anton    2458: c_addr = (Char *)lt_dlerror();
                   2459: u = (c_addr == NULL) ? 0 : strlen((char *)c_addr);
1.234     anton    2460: #else
                   2461: c_addr = "libltdl is not configured";
                   2462: u = strlen(c_addr);
                   2463: #endif
1.220     anton    2464: 
1.224     pazsan   2465: \+
1.142     pazsan   2466: \g peephole
1.46      pazsan   2467: 
1.112     pazsan   2468: \+peephole
                   2469: 
1.119     anton    2470: compile-prim1 ( a_prim -- ) gforth compile_prim1
                   2471: ""compile prim (incl. immargs) at @var{a_prim}""
                   2472: compile_prim1(a_prim);
                   2473: 
1.172     anton    2474: finish-code ( ... -- ... ) gforth finish_code
1.119     anton    2475: ""Perform delayed steps in code generation (branch resolution, I-cache
                   2476: flushing).""
1.172     anton    2477: /* The ... above are a workaround for a bug in gcc-2.95, which fails
                   2478:    to save spTOS (gforth-fast --enable-force-reg) */
1.119     anton    2479: finish_code();
                   2480: 
                   2481: forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
                   2482: f = forget_dyncode(c_code);
                   2483: 
                   2484: decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
                   2485: ""a_prim is the code address of the primitive that has been
                   2486: compile_prim1ed to a_code""
1.121     anton    2487: a_prim = (Cell *)decompile_code((Label)a_code);
1.119     anton    2488: 
1.112     pazsan   2489: \ set-next-code and call2 do not appear in images and can be
                   2490: \ renumbered arbitrarily
1.46      pazsan   2491: 
1.112     pazsan   2492: set-next-code ( #w -- ) gforth set_next_code
                   2493: #ifdef NO_IP
                   2494: next_code = (Label)w;
                   2495: #endif
1.34      jwilke   2496: 
1.112     pazsan   2497: call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
                   2498: /* call with explicit return address */
                   2499: #ifdef NO_IP
                   2500: INST_TAIL;
                   2501: JUMP(a_callee);
1.45      anton    2502: #else
1.112     pazsan   2503: assert(0);
1.45      anton    2504: #endif
1.131     pazsan   2505: 
                   2506: tag-offsets ( -- a_addr ) gforth tag_offsets
                   2507: extern Cell groups[32];
                   2508: a_addr = groups;
1.51      anton    2509: 
1.54      pazsan   2510: \+
1.128     anton    2511: 
                   2512: \g static_super
                   2513: 
1.173     anton    2514: ifdef(`STACK_CACHE_FILE',
1.147     anton    2515: `include(peeprules.vmg)')
1.54      pazsan   2516: 
1.112     pazsan   2517: \g end

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>