Annotation of gforth/prim, revision 1.262

1.1       anton       1: \ Gforth primitives
                      2: 
1.257     anton       3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006,2007,2008,2009,2010 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: 
1.247     anton     232: (doabicode) ( ... -- ...)      gforth-internal paren_doabicode
1.248     anton     233: ""run-time routine for @code{ABI-code} definitions""
1.247     anton     234: abifunc *f = (abifunc *)PFA(CFA);
                    235: Float *fp_mem = fp;
                    236: sp = (*f)(sp, &fp_mem);
                    237: fp = fp_mem;
1.246     dvdkhlng  238: #ifdef NO_IP
                    239: INST_TAIL;
                    240: goto *next_code;
                    241: #endif /* defined(NO_IP) */
                    242: 
1.248     anton     243: (do;abicode) ( ... -- ... ) gforth-internal paren_do_semicolon_abi_code
                    244: ""run-time routine for @code{;abi-code}-defined words""
                    245: Float *fp_mem = fp;
                    246: Address body = (Address)PFA(CFA);
                    247: semiabifunc *f = (semiabifunc *)DOES_CODE1(CFA);
                    248: sp = (*f)(sp, &fp_mem, body);
                    249: fp = fp_mem;
                    250: #ifdef NO_IP
                    251: INST_TAIL;
                    252: goto *next_code;
                    253: #endif /* defined(NO_IP) */
                    254: 
1.140     anton     255: \F [endif]
1.139     anton     256: 
1.83      pazsan    257: \g control
                    258: 
1.47      anton     259: noop   ( -- )          gforth
1.1       anton     260: :
                    261:  ;
                    262: 
1.112     pazsan    263: call   ( #a_callee -- R:a_retaddr )    new
                    264: ""Call callee (a variant of docol with inline argument).""
                    265: #ifdef NO_IP
1.148     anton     266: assert(0);
1.112     pazsan    267: INST_TAIL;
                    268: JUMP(a_callee);
                    269: #else
                    270: #ifdef DEBUG
                    271:     {
                    272:       CFA_TO_NAME((((Cell *)a_callee)-2));
                    273:       fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
                    274:              len,name);
                    275:     }
                    276: #endif
                    277: a_retaddr = (Cell *)IP;
                    278: SET_IP((Xt *)a_callee);
                    279: #endif
1.1       anton     280: 
1.47      anton     281: execute        ( xt -- )               core
1.29      crook     282: ""Perform the semantics represented by the execution token, @i{xt}.""
1.210     pazsan    283: #ifdef DEBUG
                    284: fprintf(stderr, "execute %08x\n", xt);
                    285: #endif
1.102     anton     286: #ifndef NO_IP
1.1       anton     287: ip=IP;
1.102     anton     288: #endif
1.76      anton     289: SUPER_END;
1.161     anton     290: VM_JUMP(EXEC1(xt));
1.1       anton     291: 
1.47      anton     292: perform        ( a_addr -- )   gforth
1.55      anton     293: ""@code{@@ execute}.""
1.1       anton     294: /* and pfe */
1.102     anton     295: #ifndef NO_IP
1.1       anton     296: ip=IP;
1.102     anton     297: #endif
1.76      anton     298: SUPER_END;
1.161     anton     299: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.1       anton     300: :
                    301:  @ execute ;
                    302: 
1.112     pazsan    303: ;s     ( R:w -- )              gforth  semis
                    304: ""The primitive compiled by @code{EXIT}.""
                    305: #ifdef NO_IP
                    306: INST_TAIL;
                    307: goto *(void *)w;
                    308: #else
                    309: SET_IP((Xt *)w);
                    310: #endif
                    311: 
                    312: unloop ( R:w1 R:w2 -- )        core
                    313: /* !! alias for 2rdrop */
                    314: :
                    315:  r> rdrop rdrop >r ;
                    316: 
                    317: lit-perform    ( #a_addr -- )  new     lit_perform
                    318: #ifndef NO_IP
                    319: ip=IP;
                    320: #endif
                    321: SUPER_END;
1.161     anton     322: VM_JUMP(EXEC1(*(Xt *)a_addr));
1.112     pazsan    323: 
                    324: does-exec ( #a_cfa -- R:nest a_pfa )   new     does_exec
                    325: #ifdef NO_IP
                    326: /* compiled to LIT CALL by compile_prim */
                    327: assert(0);
                    328: #else
                    329: a_pfa = PFA(a_cfa);
                    330: nest = (Cell)IP;
                    331: #ifdef DEBUG
                    332:     {
                    333:       CFA_TO_NAME(a_cfa);
                    334:       fprintf(stderr,"%08lx: does %08lx %.*s\n",
                    335:              (Cell)ip,(Cell)a_cfa,len,name);
                    336:     }
                    337: #endif
                    338: SET_IP(DOES_CODE1(a_cfa));
                    339: #endif
                    340: 
1.15      pazsan    341: \+glocals
1.1       anton     342: 
1.112     pazsan    343: branch-lp+!# ( #a_target #nlocals -- ) gforth  branch_lp_plus_store_number
1.1       anton     344: /* this will probably not be used */
1.68      anton     345: lp += nlocals;
1.112     pazsan    346: #ifdef NO_IP
                    347: INST_TAIL;
                    348: JUMP(a_target);
                    349: #else
                    350: SET_IP((Xt *)a_target);
                    351: #endif
1.1       anton     352: 
1.15      pazsan    353: \+
1.1       anton     354: 
1.112     pazsan    355: branch ( #a_target -- )        gforth
                    356: #ifdef NO_IP
                    357: INST_TAIL;
                    358: JUMP(a_target);
                    359: #else
                    360: SET_IP((Xt *)a_target);
                    361: #endif
1.1       anton     362: :
1.112     pazsan    363:  r> @ >r ;
1.1       anton     364: 
1.112     pazsan    365: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
1.1       anton     366: \ this is non-syntactical: code must open a brace that is closed by the macro
                    367: define(condbranch,
1.159     anton     368: $1 ( `#'a_target $2 ) $3
                    369: $4     #ifdef NO_IP
                    370: INST_TAIL;
                    371: #endif
                    372: $5     #ifdef NO_IP
                    373: JUMP(a_target);
                    374: #else
                    375: SET_IP((Xt *)a_target);
1.214     anton     376: ifelse(condbranch_opt,`1',`INST_TAIL; NEXT_P2;',`/* condbranch_opt=0 */')
1.159     anton     377: #endif
                    378: }
1.214     anton     379: ifelse(condbranch_opt,`1',`SUPER_CONTINUE;',`/* condbranch_opt=0 */')
1.159     anton     380: $6
                    381: 
                    382: \+glocals
                    383: 
                    384: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
                    385: $4     #ifdef NO_IP
                    386: INST_TAIL;
                    387: #endif
                    388: $5     lp += nlocals;
                    389: #ifdef NO_IP
                    390: JUMP(a_target);
                    391: #else
                    392: SET_IP((Xt *)a_target);
1.214     anton     393: ifelse(condbranch_opt,`1',`INST_TAIL; NEXT_P2;',`/* condbranch_opt=0 */')
1.159     anton     394: #endif
                    395: }
1.214     anton     396: ifelse(condbranch_opt,`1',`SUPER_CONTINUE;',`/* condbranch_opt=0 */')
1.1       anton     397: 
1.15      pazsan    398: \+
1.1       anton     399: )
                    400: 
1.68      anton     401: condbranch(?branch,f --,f83    question_branch,
1.112     pazsan    402: ,if (f==0) {
1.5       jwilke    403: ,:
1.112     pazsan    404:  0= dup 0=          \ !f f
                    405:  r> tuck cell+      \ !f branchoffset f IP+
                    406:  and -rot @ and or  \ f&IP+|!f&branch
1.5       jwilke    407:  >r ;)
1.1       anton     408: 
                    409: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
                    410: \ is only used in if's (yet)
                    411: 
1.15      pazsan    412: \+xconds
1.1       anton     413: 
1.172     anton     414: ?dup-?branch   ( #a_target f -- S:... )        new     question_dupe_question_branch
1.1       anton     415: ""The run-time procedure compiled by @code{?DUP-IF}.""
                    416: if (f==0) {
1.112     pazsan    417: #ifdef NO_IP
                    418: INST_TAIL;
                    419: JUMP(a_target);
                    420: #else
                    421: SET_IP((Xt *)a_target);
                    422: #endif
1.174     anton     423: } else {
1.172     anton     424: sp--;
                    425: sp[0]=f;
1.174     anton     426: }
1.1       anton     427: 
1.172     anton     428: ?dup-0=-?branch ( #a_target f -- S:... ) new   question_dupe_zero_equals_question_branch
1.1       anton     429: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
                    430: if (f!=0) {
                    431:   sp--;
1.172     anton     432:   sp[0]=f;
1.112     pazsan    433: #ifdef NO_IP
                    434:   JUMP(a_target);
                    435: #else
                    436:   SET_IP((Xt *)a_target);
                    437: #endif
1.1       anton     438: }
                    439: 
1.15      pazsan    440: \+
1.31      jwilke    441: \fhas? skiploopprims 0= [IF]
1.1       anton     442: 
1.68      anton     443: condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
1.65      anton     444: n2=n1-1;
1.112     pazsan    445: ,if (n1) {
1.1       anton     446: ,:
                    447:  r> r> dup 1- >r
1.112     pazsan    448:  IF @ >r ELSE cell+ >r THEN ;)
1.1       anton     449: 
1.68      anton     450: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth        paren_loop,
1.65      anton     451: n2=n1+1;
1.112     pazsan    452: ,if (n2 != nlimit) {
1.1       anton     453: ,:
                    454:  r> r> 1+ r> 2dup =
                    455:  IF >r 1- >r cell+ >r
1.112     pazsan    456:  ELSE >r >r @ >r THEN ;)
1.1       anton     457: 
1.68      anton     458: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
1.1       anton     459: /* !! check this thoroughly */
                    460: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
                    461: /* dependent upon two's complement arithmetic */
1.65      anton     462: Cell olddiff = n1-nlimit;
                    463: n2=n1+n;       
1.149     anton     464: ,if (((olddiff^(olddiff+n))    /* the limit is not crossed */
                    465:      &(olddiff^n))            /* OR it is a wrap-around effect */
                    466:     >=0) { /* & is used to avoid having two branches for gforth-native */
1.1       anton     467: ,:
                    468:  r> swap
                    469:  r> r> 2dup - >r
                    470:  2 pick r@ + r@ xor 0< 0=
                    471:  3 pick r> xor 0< 0= or
1.112     pazsan    472:  IF    >r + >r @ >r
1.1       anton     473:  ELSE  >r >r drop cell+ >r THEN ;)
                    474: 
1.15      pazsan    475: \+xconds
1.1       anton     476: 
1.68      anton     477: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
1.65      anton     478: UCell olddiff = n1-nlimit;
                    479: n2=n1-u;
1.112     pazsan    480: ,if (olddiff>u) {
1.1       anton     481: ,)
                    482: 
1.68      anton     483: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth    paren_symmetric_plus_loop,
1.1       anton     484: ""The run-time procedure compiled by S+LOOP. It loops until the index
                    485: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
                    486: version of (+LOOP).""
                    487: /* !! check this thoroughly */
1.65      anton     488: Cell diff = n1-nlimit;
1.1       anton     489: Cell newdiff = diff+n;
                    490: if (n<0) {
                    491:     diff = -diff;
                    492:     newdiff = -newdiff;
                    493: }
1.65      anton     494: n2=n1+n;
1.149     anton     495: ,if (((~diff)|newdiff)<0) { /* use | to avoid two branches for gforth-native */
1.1       anton     496: ,)
                    497: 
1.15      pazsan    498: \+
1.1       anton     499: 
1.112     pazsan    500: (for)   ( ncount -- R:nlimit R:ncount )         cmFORTH         paren_for
1.1       anton     501: /* or (for) = >r -- collides with unloop! */
1.65      anton     502: nlimit=0;
1.1       anton     503: :
                    504:  r> swap 0 >r >r >r ;
                    505: 
1.112     pazsan    506: (do)    ( nlimit nstart -- R:nlimit R:nstart )  gforth          paren_do
1.1       anton     507: :
                    508:  r> swap rot >r >r >r ;
                    509: 
1.112     pazsan    510: (?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth  paren_question_do
                    511: #ifdef NO_IP
                    512:     INST_TAIL;
                    513: #endif
1.1       anton     514: if (nstart == nlimit) {
1.112     pazsan    515: #ifdef NO_IP
                    516:     JUMP(a_target);
                    517: #else
                    518:     SET_IP((Xt *)a_target);
                    519: #endif
1.1       anton     520: }
                    521: :
                    522:   2dup =
                    523:   IF   r> swap rot >r >r
1.112     pazsan    524:        @ >r
1.1       anton     525:   ELSE r> swap rot >r >r
                    526:        cell+ >r
                    527:   THEN ;                               \ --> CORE-EXT
                    528: 
1.15      pazsan    529: \+xconds
1.1       anton     530: 
1.112     pazsan    531: (+do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
                    532: #ifdef NO_IP
                    533:     INST_TAIL;
                    534: #endif
1.1       anton     535: if (nstart >= nlimit) {
1.112     pazsan    536: #ifdef NO_IP
                    537:     JUMP(a_target);
                    538: #else
                    539:     SET_IP((Xt *)a_target);
                    540: #endif
1.1       anton     541: }
                    542: :
                    543:  swap 2dup
                    544:  r> swap >r swap >r
                    545:  >=
                    546:  IF
1.112     pazsan    547:      @
1.1       anton     548:  ELSE
                    549:      cell+
                    550:  THEN  >r ;
                    551: 
1.112     pazsan    552: (u+do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
                    553: #ifdef NO_IP
                    554:     INST_TAIL;
                    555: #endif
1.1       anton     556: if (ustart >= ulimit) {
1.112     pazsan    557: #ifdef NO_IP
                    558: JUMP(a_target);
                    559: #else
                    560: SET_IP((Xt *)a_target);
                    561: #endif
1.1       anton     562: }
                    563: :
                    564:  swap 2dup
                    565:  r> swap >r swap >r
                    566:  u>=
                    567:  IF
1.112     pazsan    568:      @
1.1       anton     569:  ELSE
                    570:      cell+
                    571:  THEN  >r ;
                    572: 
1.112     pazsan    573: (-do)  ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
                    574: #ifdef NO_IP
                    575:     INST_TAIL;
                    576: #endif
1.1       anton     577: if (nstart <= nlimit) {
1.112     pazsan    578: #ifdef NO_IP
                    579: JUMP(a_target);
                    580: #else
                    581: SET_IP((Xt *)a_target);
                    582: #endif
1.1       anton     583: }
                    584: :
                    585:  swap 2dup
                    586:  r> swap >r swap >r
                    587:  <=
                    588:  IF
1.112     pazsan    589:      @
1.1       anton     590:  ELSE
                    591:      cell+
                    592:  THEN  >r ;
                    593: 
1.112     pazsan    594: (u-do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
                    595: #ifdef NO_IP
                    596:     INST_TAIL;
                    597: #endif
1.1       anton     598: if (ustart <= ulimit) {
1.112     pazsan    599: #ifdef NO_IP
                    600: JUMP(a_target);
                    601: #else
                    602: SET_IP((Xt *)a_target);
                    603: #endif
1.1       anton     604: }
                    605: :
                    606:  swap 2dup
                    607:  r> swap >r swap >r
                    608:  u<=
                    609:  IF
1.112     pazsan    610:      @
1.1       anton     611:  ELSE
                    612:      cell+
                    613:  THEN  >r ;
                    614: 
1.255     anton     615: (try1) ( ... a_oldhandler a_recovery -- R:a_recovery R:a_sp R:f_fp R:c_lp R:a_oldhandler a_newhandler ) gforth paren_try1
                    616: a_sp = sp-1;
                    617: f_fp = fp;
                    618: c_lp = lp;
                    619: a_newhandler = rp-5;
                    620: 
1.256     anton     621: (throw1) ( ... wball a_handler -- ... wball ) gforth paren_throw1
                    622: rp = a_handler;
                    623: lp = (Address)rp[1];
                    624: fp = (Float *)rp[2];
                    625: sp = (Cell *)rp[3];
                    626: #ifndef NO_IP
                    627: ip=IP;
                    628: #endif
                    629: SUPER_END;
                    630: VM_JUMP(EXEC1(*(Xt *)rp[4]));
                    631:   
                    632: 
1.15      pazsan    633: \+
1.1       anton     634: 
1.5       jwilke    635: \ don't make any assumptions where the return stack is!!
                    636: \ implement this in machine code if it should run quickly!
                    637: 
1.65      anton     638: i      ( R:n -- R:n n )                core
1.1       anton     639: :
1.5       jwilke    640: \ rp@ cell+ @ ;
                    641:   r> r> tuck >r >r ;
1.1       anton     642: 
1.65      anton     643: i'     ( R:w R:w2 -- R:w R:w2 w )              gforth          i_tick
1.1       anton     644: :
1.5       jwilke    645: \ rp@ cell+ cell+ @ ;
                    646:   r> r> r> dup itmp ! >r >r >r itmp @ ;
                    647: variable itmp
1.1       anton     648: 
1.215     anton     649: j      ( R:w R:w1 R:w2 -- w R:w R:w1 R:w2 )    core
1.1       anton     650: :
1.5       jwilke    651: \ rp@ cell+ cell+ cell+ @ ;
                    652:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
                    653: [IFUNDEF] itmp variable itmp [THEN]
1.1       anton     654: 
1.215     anton     655: 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     656: :
1.5       jwilke    657: \ rp@ [ 5 cells ] Literal + @ ;
                    658:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
                    659: [IFUNDEF] itmp variable itmp [THEN]
1.31      jwilke    660: 
                    661: \f[THEN]
1.1       anton     662: 
                    663: \ digit is high-level: 0/0%
                    664: 
1.83      pazsan    665: \g strings
                    666: 
1.47      anton     667: move   ( c_from c_to ucount -- )               core
1.52      anton     668: ""Copy the contents of @i{ucount} aus at @i{c-from} to
1.33      anton     669: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
1.52      anton     670: /* !! note that the standard specifies addr, not c-addr */
1.1       anton     671: memmove(c_to,c_from,ucount);
                    672: /* make an Ifdef for bsd and others? */
                    673: :
                    674:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
                    675: 
1.47      anton     676: cmove  ( c_from c_to u -- )    string  c_move
1.33      anton     677: ""Copy the contents of @i{ucount} characters from data space at
                    678: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    679: from low address to high address; i.e., for overlapping areas it is
                    680: safe if @i{c-to}=<@i{c-from}.""
1.125     anton     681: cmove(c_from,c_to,u);
1.1       anton     682: :
                    683:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
                    684: 
1.47      anton     685: cmove> ( c_from c_to u -- )    string  c_move_up
1.33      anton     686: ""Copy the contents of @i{ucount} characters from data space at
                    687: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    688: from high address to low address; i.e., for overlapping areas it is
                    689: safe if @i{c-to}>=@i{c-from}.""
1.125     anton     690: cmove_up(c_from,c_to,u);
1.1       anton     691: :
                    692:  dup 0= IF  drop 2drop exit  THEN
                    693:  rot over + -rot bounds swap 1-
                    694:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
                    695: 
1.47      anton     696: fill   ( c_addr u c -- )       core
1.52      anton     697: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
1.1       anton     698: memset(c_addr,c,u);
                    699: :
                    700:  -rot bounds
                    701:  ?DO  dup I c!  LOOP  drop ;
                    702: 
1.47      anton     703: compare        ( c_addr1 u1 c_addr2 u2 -- n )  string
1.29      crook     704: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    705: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
1.1       anton     706: is 1. Currently this is based on the machine's character
1.26      crook     707: comparison. In the future, this may change to consider the current
1.1       anton     708: locale and its collation order.""
1.46      pazsan    709: /* close ' to keep fontify happy */ 
1.125     anton     710: n = compare(c_addr1, u1, c_addr2, u2);
1.1       anton     711: :
1.43      pazsan    712:  rot 2dup swap - >r min swap -text dup
                    713:  IF  rdrop  ELSE  drop r> sgn  THEN ;
1.143     pazsan    714: : -text ( c_addr1 u c_addr2 -- n )
                    715:  swap bounds
                    716:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    717:  ELSE  c@ I c@ - unloop  THEN  sgn ;
1.43      pazsan    718: : sgn ( n -- -1/0/1 )
                    719:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     720: 
1.125     anton     721: \ -text is only used by replaced primitives now; move it elsewhere
                    722: \ -text        ( c_addr1 u c_addr2 -- n )      new     dash_text
                    723: \ n = memcmp(c_addr1, c_addr2, u);
                    724: \ if (n<0)
                    725: \   n = -1;
                    726: \ else if (n>0)
                    727: \   n = 1;
                    728: \ :
                    729: \  swap bounds
                    730: \  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    731: \  ELSE  c@ I c@ - unloop  THEN  sgn ;
                    732: \ : sgn ( n -- -1/0/1 )
                    733: \  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     734: 
1.47      anton     735: toupper        ( c1 -- c2 )    gforth
1.29      crook     736: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
1.25      anton     737: is the equivalent upper-case character. All other characters are unchanged.""
1.1       anton     738: c2 = toupper(c1);
                    739: :
                    740:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
                    741: 
1.223     anton     742: capscompare    ( c_addr1 u1 c_addr2 u2 -- n )  gforth
1.188     pazsan    743: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    744: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
                    745: is 1. Currently this is based on the machine's character
                    746: comparison. In the future, this may change to consider the current
                    747: locale and its collation order.""
                    748: /* close ' to keep fontify happy */ 
                    749: n = capscompare(c_addr1, u1, c_addr2, u2);
                    750: 
1.47      anton     751: /string        ( c_addr1 u1 n -- c_addr2 u2 )  string  slash_string
1.29      crook     752: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
1.27      crook     753: characters from the start of the string.""
1.1       anton     754: c_addr2 = c_addr1+n;
                    755: u2 = u1-n;
                    756: :
                    757:  tuck - >r + r> dup 0< IF  - 0  THEN ;
                    758: 
1.83      pazsan    759: \g arith
                    760: 
1.112     pazsan    761: lit    ( #w -- w )             gforth
                    762: :
                    763:  r> dup @ swap cell+ >r ;
                    764: 
1.47      anton     765: +      ( n1 n2 -- n )          core    plus
1.1       anton     766: n = n1+n2;
                    767: 
1.112     pazsan    768: \ lit+ / lit_plus = lit +
                    769: 
                    770: lit+   ( n1 #n2 -- n )         new     lit_plus
1.211     pazsan    771: #ifdef DEBUG
                    772: fprintf(stderr, "lit+ %08x\n", n2);
                    773: #endif
1.112     pazsan    774: n=n1+n2;
                    775: 
1.1       anton     776: \ PFE-0.9.14 has it differently, but the next release will have it as follows
1.47      anton     777: under+ ( n1 n2 n3 -- n n2 )    gforth  under_plus
1.29      crook     778: ""add @i{n3} to @i{n1} (giving @i{n})""
1.1       anton     779: n = n1+n3;
                    780: :
                    781:  rot + swap ;
                    782: 
1.47      anton     783: -      ( n1 n2 -- n )          core    minus
1.1       anton     784: n = n1-n2;
                    785: :
                    786:  negate + ;
                    787: 
1.47      anton     788: negate ( n1 -- n2 )            core
1.1       anton     789: /* use minus as alias */
                    790: n2 = -n1;
                    791: :
                    792:  invert 1+ ;
                    793: 
1.47      anton     794: 1+     ( n1 -- n2 )            core            one_plus
1.1       anton     795: n2 = n1+1;
                    796: :
                    797:  1 + ;
                    798: 
1.47      anton     799: 1-     ( n1 -- n2 )            core            one_minus
1.1       anton     800: n2 = n1-1;
                    801: :
                    802:  1 - ;
                    803: 
1.47      anton     804: max    ( n1 n2 -- n )  core
1.1       anton     805: if (n1<n2)
                    806:   n = n2;
                    807: else
                    808:   n = n1;
                    809: :
                    810:  2dup < IF swap THEN drop ;
                    811: 
1.47      anton     812: min    ( n1 n2 -- n )  core
1.1       anton     813: if (n1<n2)
                    814:   n = n1;
                    815: else
                    816:   n = n2;
                    817: :
                    818:  2dup > IF swap THEN drop ;
                    819: 
1.52      anton     820: abs    ( n -- u )      core
                    821: if (n<0)
                    822:   u = -n;
1.1       anton     823: else
1.52      anton     824:   u = n;
1.1       anton     825: :
                    826:  dup 0< IF negate THEN ;
                    827: 
1.47      anton     828: *      ( n1 n2 -- n )          core    star
1.1       anton     829: n = n1*n2;
                    830: :
                    831:  um* drop ;
                    832: 
1.47      anton     833: /      ( n1 n2 -- n )          core    slash
1.1       anton     834: n = n1/n2;
1.200     anton     835: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     836:   throw(BALL_DIVZERO);
1.200     anton     837: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     838:   throw(BALL_RESULTRANGE);
1.197     anton     839: if (FLOORED_DIV && ((n1^n2) < 0) && (n1%n2 != 0))
                    840:   n--;
1.1       anton     841: :
                    842:  /mod nip ;
                    843: 
1.47      anton     844: mod    ( n1 n2 -- n )          core
1.1       anton     845: n = n1%n2;
1.200     anton     846: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     847:   throw(BALL_DIVZERO);
1.200     anton     848: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     849:   throw(BALL_RESULTRANGE);
1.169     pazsan    850: if(FLOORED_DIV && ((n1^n2) < 0) && n!=0) n += n2;
1.1       anton     851: :
                    852:  /mod drop ;
                    853: 
1.47      anton     854: /mod   ( n1 n2 -- n3 n4 )              core            slash_mod
1.1       anton     855: n4 = n1/n2;
                    856: n3 = n1%n2; /* !! is this correct? look into C standard! */
1.200     anton     857: if (CHECK_DIVISION_SW && n2 == 0)
1.198     anton     858:   throw(BALL_DIVZERO);
1.200     anton     859: if (CHECK_DIVISION_SW && n2 == -1 && n1 == CELL_MIN)
1.198     anton     860:   throw(BALL_RESULTRANGE);
1.169     pazsan    861: if (FLOORED_DIV && ((n1^n2) < 0) && n3!=0) {
1.162     pazsan    862:   n4--;
                    863:   n3+=n2;
                    864: }
1.1       anton     865: :
                    866:  >r s>d r> fm/mod ;
                    867: 
1.162     pazsan    868: */mod  ( n1 n2 n3 -- n4 n5 )   core    star_slash_mod
                    869: ""n1*n2=n3*n5+n4, with the intermediate result (n1*n2) being double.""
                    870: #ifdef BUGGY_LL_MUL
                    871: DCell d = mmul(n1,n2);
                    872: #else
                    873: DCell d = (DCell)n1 * (DCell)n2;
                    874: #endif
1.202     anton     875: #ifdef ASM_SM_SLASH_REM
                    876: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, n4, n5);
1.207     anton     877: if (FLOORED_DIV && ((DHI(d)^n3)<0) && n4!=0) {
1.202     anton     878:   if (CHECK_DIVISION && n5 == CELL_MIN)
                    879:     throw(BALL_RESULTRANGE);
                    880:   n5--;
                    881:   n4+=n3;
                    882: }
                    883: #else
1.207     anton     884: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.162     pazsan    885: n4=DHI(r);
                    886: n5=DLO(r);
                    887: #endif
                    888: :
                    889:  >r m* r> fm/mod ;
                    890: 
                    891: */     ( n1 n2 n3 -- n4 )      core    star_slash
                    892: ""n4=(n1*n2)/n3, with the intermediate result being double.""
                    893: #ifdef BUGGY_LL_MUL
                    894: DCell d = mmul(n1,n2);
                    895: #else
                    896: DCell d = (DCell)n1 * (DCell)n2;
                    897: #endif
1.202     anton     898: #ifdef ASM_SM_SLASH_REM
                    899: Cell remainder;
                    900: ASM_SM_SLASH_REM(DLO(d), DHI(d), n3, remainder, n4);
1.207     anton     901: if (FLOORED_DIV && ((DHI(d)^n3)<0) && remainder!=0) {
1.202     anton     902:   if (CHECK_DIVISION && n4 == CELL_MIN)
                    903:     throw(BALL_RESULTRANGE);
                    904:   n4--;
                    905: }
                    906: #else
1.207     anton     907: DCell r = FLOORED_DIV ? fmdiv(d,n3) : smdiv(d,n3);
1.168     pazsan    908: n4=DLO(r);
1.162     pazsan    909: #endif
                    910: :
                    911:  */mod nip ;
                    912: 
1.47      anton     913: 2*     ( n1 -- n2 )            core            two_star
1.52      anton     914: ""Shift left by 1; also works on unsigned numbers""
1.1       anton     915: n2 = 2*n1;
                    916: :
                    917:  dup + ;
                    918: 
1.47      anton     919: 2/     ( n1 -- n2 )            core            two_slash
1.52      anton     920: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                    921: division by 2 (note that @code{/} not necessarily floors).""
1.1       anton     922: n2 = n1>>1;
                    923: :
                    924:  dup MINI and IF 1 ELSE 0 THEN
1.187     pazsan    925:  [ bits/char cell * 1- ] literal 
1.5       jwilke    926:  0 DO 2* swap dup 2* >r MINI and 
1.1       anton     927:      IF 1 ELSE 0 THEN or r> swap
                    928:  LOOP nip ;
                    929: 
1.47      anton     930: fm/mod ( d1 n1 -- n2 n3 )              core            f_m_slash_mod
1.29      crook     931: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
1.201     anton     932: #ifdef ASM_SM_SLASH_REM
1.203     anton     933: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.169     pazsan    934: if (((DHI(d1)^n1)<0) && n2!=0) {
1.200     anton     935:   if (CHECK_DIVISION && n3 == CELL_MIN)
1.198     anton     936:     throw(BALL_RESULTRANGE);
1.165     anton     937:   n3--;
                    938:   n2+=n1;
                    939: }
1.201     anton     940: #else /* !defined(ASM_SM_SLASH_REM) */
                    941: DCell r = fmdiv(d1,n1);
                    942: n2=DHI(r);
                    943: n3=DLO(r);
1.203     anton     944: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     945: :
                    946:  dup >r dup 0< IF  negate >r dnegate r>  THEN
                    947:  over       0< IF  tuck + swap  THEN
                    948:  um/mod
                    949:  r> 0< IF  swap negate swap  THEN ;
                    950: 
1.47      anton     951: sm/rem ( d1 n1 -- n2 n3 )              core            s_m_slash_rem
1.29      crook     952: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
1.165     anton     953: #ifdef ASM_SM_SLASH_REM
1.203     anton     954: ASM_SM_SLASH_REM(DLO(d1), DHI(d1), n1, n2, n3);
1.165     anton     955: #else /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     956: DCell r = smdiv(d1,n1);
1.162     pazsan    957: n2=DHI(r);
                    958: n3=DLO(r);
1.165     anton     959: #endif /* !defined(ASM_SM_SLASH_REM) */
1.1       anton     960: :
                    961:  over >r dup >r abs -rot
                    962:  dabs rot um/mod
                    963:  r> r@ xor 0< IF       negate       THEN
                    964:  r>        0< IF  swap negate swap  THEN ;
                    965: 
1.47      anton     966: m*     ( n1 n2 -- d )          core    m_star
1.158     pazsan    967: #ifdef BUGGY_LL_MUL
1.1       anton     968: d = mmul(n1,n2);
                    969: #else
                    970: d = (DCell)n1 * (DCell)n2;
                    971: #endif
                    972: :
                    973:  2dup      0< and >r
                    974:  2dup swap 0< and >r
                    975:  um* r> - r> - ;
                    976: 
1.47      anton     977: um*    ( u1 u2 -- ud )         core    u_m_star
1.1       anton     978: /* use u* as alias */
1.158     pazsan    979: #ifdef BUGGY_LL_MUL
1.1       anton     980: ud = ummul(u1,u2);
                    981: #else
                    982: ud = (UDCell)u1 * (UDCell)u2;
                    983: #endif
                    984: :
1.137     pazsan    985:    0 -rot dup [ 8 cells ] literal -
1.1       anton     986:    DO
1.137     pazsan    987:        dup 0< I' and d2*+ drop
                    988:    LOOP ;
1.1       anton     989: : d2*+ ( ud n -- ud+n c )
                    990:    over MINI
                    991:    and >r >r 2dup d+ swap r> + swap r> ;
                    992: 
1.47      anton     993: um/mod ( ud u1 -- u2 u3 )              core    u_m_slash_mod
1.32      anton     994: ""ud=u3*u1+u2, u1>u2>=0""
1.165     anton     995: #ifdef ASM_UM_SLASH_MOD
1.203     anton     996: ASM_UM_SLASH_MOD(DLO(ud), DHI(ud), u1, u2, u3);
1.165     anton     997: #else /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton     998: UDCell r = umdiv(ud,u1);
1.162     pazsan    999: u2=DHI(r);
                   1000: u3=DLO(r);
1.165     anton    1001: #endif /* !defined(ASM_UM_SLASH_MOD) */
1.1       anton    1002: :
                   1003:    0 swap [ 8 cells 1 + ] literal 0
1.5       jwilke   1004:    ?DO /modstep
1.1       anton    1005:    LOOP drop swap 1 rshift or swap ;
                   1006: : /modstep ( ud c R: u -- ud-?u c R: u )
1.5       jwilke   1007:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
1.1       anton    1008: : d2*+ ( ud n -- ud+n c )
                   1009:    over MINI
                   1010:    and >r >r 2dup d+ swap r> + swap r> ;
                   1011: 
1.47      anton    1012: m+     ( d1 n -- d2 )          double          m_plus
1.158     pazsan   1013: #ifdef BUGGY_LL_ADD
                   1014: DLO_IS(d2, DLO(d1)+n);
                   1015: DHI_IS(d2, DHI(d1) - (n<0) + (DLO(d2)<DLO(d1)));
1.1       anton    1016: #else
                   1017: d2 = d1+n;
                   1018: #endif
                   1019: :
                   1020:  s>d d+ ;
                   1021: 
1.47      anton    1022: d+     ( d1 d2 -- d )          double  d_plus
1.158     pazsan   1023: #ifdef BUGGY_LL_ADD
                   1024: DLO_IS(d, DLO(d1) + DLO(d2));
                   1025: DHI_IS(d, DHI(d1) + DHI(d2) + (d.lo<DLO(d1)));
1.1       anton    1026: #else
                   1027: d = d1+d2;
                   1028: #endif
                   1029: :
                   1030:  rot + >r tuck + swap over u> r> swap - ;
                   1031: 
1.47      anton    1032: d-     ( d1 d2 -- d )          double          d_minus
1.158     pazsan   1033: #ifdef BUGGY_LL_ADD
                   1034: DLO_IS(d, DLO(d1) - DLO(d2));
                   1035: DHI_IS(d, DHI(d1)-DHI(d2)-(DLO(d1)<DLO(d2)));
1.1       anton    1036: #else
                   1037: d = d1-d2;
                   1038: #endif
                   1039: :
                   1040:  dnegate d+ ;
                   1041: 
1.47      anton    1042: dnegate        ( d1 -- d2 )            double  d_negate
1.1       anton    1043: /* use dminus as alias */
1.158     pazsan   1044: #ifdef BUGGY_LL_ADD
1.1       anton    1045: d2 = dnegate(d1);
                   1046: #else
                   1047: d2 = -d1;
                   1048: #endif
                   1049: :
                   1050:  invert swap negate tuck 0= - ;
                   1051: 
1.47      anton    1052: d2*    ( d1 -- d2 )            double          d_two_star
1.52      anton    1053: ""Shift left by 1; also works on unsigned numbers""
1.205     anton    1054: d2 = DLSHIFT(d1,1);
1.1       anton    1055: :
                   1056:  2dup d+ ;
                   1057: 
1.47      anton    1058: d2/    ( d1 -- d2 )            double          d_two_slash
1.52      anton    1059: ""Arithmetic shift right by 1.  For signed numbers this is a floored
                   1060: division by 2.""
1.158     pazsan   1061: #ifdef BUGGY_LL_SHIFT
                   1062: DHI_IS(d2, DHI(d1)>>1);
                   1063: DLO_IS(d2, (DLO(d1)>>1) | (DHI(d1)<<(CELL_BITS-1)));
1.1       anton    1064: #else
                   1065: d2 = d1>>1;
                   1066: #endif
                   1067: :
                   1068:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
                   1069:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
                   1070: 
1.47      anton    1071: and    ( w1 w2 -- w )          core
1.1       anton    1072: w = w1&w2;
                   1073: 
1.47      anton    1074: or     ( w1 w2 -- w )          core
1.1       anton    1075: w = w1|w2;
                   1076: :
                   1077:  invert swap invert and invert ;
                   1078: 
1.47      anton    1079: xor    ( w1 w2 -- w )          core    x_or
1.1       anton    1080: w = w1^w2;
                   1081: 
1.47      anton    1082: invert ( w1 -- w2 )            core
1.1       anton    1083: w2 = ~w1;
                   1084: :
                   1085:  MAXU xor ;
                   1086: 
1.47      anton    1087: rshift ( u1 n -- u2 )          core    r_shift
1.53      anton    1088: ""Logical shift right by @i{n} bits.""
1.154     pazsan   1089: #ifdef BROKEN_SHIFT
                   1090:   u2 = rshift(u1, n);
                   1091: #else
                   1092:   u2 = u1 >> n;
                   1093: #endif
1.1       anton    1094: :
                   1095:     0 ?DO 2/ MAXI and LOOP ;
                   1096: 
1.47      anton    1097: lshift ( u1 n -- u2 )          core    l_shift
1.154     pazsan   1098: #ifdef BROKEN_SHIFT
                   1099:   u2 = lshift(u1, n);
                   1100: #else
                   1101:   u2 = u1 << n;
                   1102: #endif
1.1       anton    1103: :
                   1104:     0 ?DO 2* LOOP ;
                   1105: 
1.110     pazsan   1106: \g compare
                   1107: 
1.1       anton    1108: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1109: define(comparisons,
1.47      anton    1110: $1=    ( $2 -- f )             $6      $3equals
1.1       anton    1111: f = FLAG($4==$5);
                   1112: :
                   1113:     [ char $1x char 0 = [IF]
                   1114:        ] IF false ELSE true THEN [
                   1115:     [ELSE]
                   1116:        ] xor 0= [
                   1117:     [THEN] ] ;
                   1118: 
1.47      anton    1119: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton    1120: f = FLAG($4!=$5);
                   1121: :
                   1122:     [ char $1x char 0 = [IF]
                   1123:        ] IF true ELSE false THEN [
                   1124:     [ELSE]
                   1125:        ] xor 0<> [
                   1126:     [THEN] ] ;
                   1127: 
1.47      anton    1128: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton    1129: f = FLAG($4<$5);
                   1130: :
                   1131:     [ char $1x char 0 = [IF]
                   1132:        ] MINI and 0<> [
                   1133:     [ELSE] char $1x char u = [IF]
                   1134:        ]   2dup xor 0<  IF nip ELSE - THEN 0<  [
                   1135:        [ELSE]
                   1136:            ] MINI xor >r MINI xor r> u< [
                   1137:        [THEN]
                   1138:     [THEN] ] ;
                   1139: 
1.47      anton    1140: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton    1141: f = FLAG($4>$5);
                   1142: :
                   1143:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1144:     $1< ;
                   1145: 
1.47      anton    1146: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton    1147: f = FLAG($4<=$5);
                   1148: :
                   1149:     $1> 0= ;
                   1150: 
1.47      anton    1151: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton    1152: f = FLAG($4>=$5);
                   1153: :
                   1154:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                   1155:     $1<= ;
                   1156: 
                   1157: )
                   1158: 
                   1159: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
                   1160: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
                   1161: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
                   1162: 
                   1163: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                   1164: define(dcomparisons,
1.47      anton    1165: $1=    ( $2 -- f )             $6      $3equals
1.158     pazsan   1166: #ifdef BUGGY_LL_CMP
1.1       anton    1167: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
                   1168: #else
                   1169: f = FLAG($4==$5);
                   1170: #endif
                   1171: 
1.47      anton    1172: $1<>   ( $2 -- f )             $7      $3not_equals
1.158     pazsan   1173: #ifdef BUGGY_LL_CMP
1.1       anton    1174: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
                   1175: #else
                   1176: f = FLAG($4!=$5);
                   1177: #endif
                   1178: 
1.47      anton    1179: $1<    ( $2 -- f )             $8      $3less_than
1.158     pazsan   1180: #ifdef BUGGY_LL_CMP
1.1       anton    1181: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
                   1182: #else
                   1183: f = FLAG($4<$5);
                   1184: #endif
                   1185: 
1.47      anton    1186: $1>    ( $2 -- f )             $9      $3greater_than
1.158     pazsan   1187: #ifdef BUGGY_LL_CMP
1.1       anton    1188: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
                   1189: #else
                   1190: f = FLAG($4>$5);
                   1191: #endif
                   1192: 
1.47      anton    1193: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.158     pazsan   1194: #ifdef BUGGY_LL_CMP
1.1       anton    1195: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
                   1196: #else
                   1197: f = FLAG($4<=$5);
                   1198: #endif
                   1199: 
1.47      anton    1200: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.158     pazsan   1201: #ifdef BUGGY_LL_CMP
1.1       anton    1202: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
                   1203: #else
                   1204: f = FLAG($4>=$5);
                   1205: #endif
                   1206: 
                   1207: )
                   1208: 
1.15      pazsan   1209: \+dcomps
1.1       anton    1210: 
                   1211: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
                   1212: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
                   1213: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
                   1214: 
1.15      pazsan   1215: \+
1.1       anton    1216: 
1.47      anton    1217: within ( u1 u2 u3 -- f )               core-ext
1.32      anton    1218: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
                   1219: unsigned and signed numbers (but not a mixture).  Another way to think
                   1220: about this word is to consider the numbers as a circle (wrapping
                   1221: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
                   1222: min-n for signed numbers); now consider the range from u2 towards
                   1223: increasing numbers up to and excluding u3 (giving an empty range if
1.52      anton    1224: u2=u3); if u1 is in this range, @code{within} returns true.""
1.1       anton    1225: f = FLAG(u1-u2 < u3-u2);
                   1226: :
                   1227:  over - >r - r> u< ;
                   1228: 
1.112     pazsan   1229: \g stack
                   1230: 
                   1231: useraddr       ( #u -- a_addr )        new
                   1232: a_addr = (Cell *)(up+u);
                   1233: 
                   1234: up!    ( a_addr -- )   gforth  up_store
1.190     pazsan   1235: gforth_UP=up=(Address)a_addr;
1.112     pazsan   1236: :
                   1237:  up ! ;
                   1238: Variable UP
                   1239: 
1.172     anton    1240: sp@    ( S:... -- a_addr )             gforth          sp_fetch
                   1241: a_addr = sp;
1.1       anton    1242: 
1.172     anton    1243: sp!    ( a_addr -- S:... )             gforth          sp_store
1.1       anton    1244: sp = a_addr;
                   1245: 
1.47      anton    1246: rp@    ( -- a_addr )           gforth          rp_fetch
1.1       anton    1247: a_addr = rp;
                   1248: 
1.47      anton    1249: rp!    ( a_addr -- )           gforth          rp_store
1.1       anton    1250: rp = a_addr;
                   1251: 
1.15      pazsan   1252: \+floating
1.1       anton    1253: 
1.172     anton    1254: fp@    ( f:... -- f_addr )     gforth  fp_fetch
1.1       anton    1255: f_addr = fp;
                   1256: 
1.172     anton    1257: fp!    ( f_addr -- f:... )     gforth  fp_store
1.1       anton    1258: fp = f_addr;
                   1259: 
1.15      pazsan   1260: \+
1.1       anton    1261: 
1.65      anton    1262: >r     ( w -- R:w )            core    to_r
1.1       anton    1263: :
                   1264:  (>r) ;
                   1265: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
                   1266: 
1.65      anton    1267: r>     ( R:w -- w )            core    r_from
1.1       anton    1268: :
                   1269:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
                   1270: Create (rdrop) ' ;s A,
                   1271: 
1.65      anton    1272: rdrop  ( R:w -- )              gforth
1.1       anton    1273: :
                   1274:  r> r> drop >r ;
                   1275: 
1.136     pazsan   1276: 2>r    ( d -- R:d )    core-ext        two_to_r
1.1       anton    1277: :
                   1278:  swap r> swap >r swap >r >r ;
                   1279: 
1.136     pazsan   1280: 2r>    ( R:d -- d )    core-ext        two_r_from
1.1       anton    1281: :
                   1282:  r> r> swap r> swap >r swap ;
                   1283: 
1.136     pazsan   1284: 2r@    ( R:d -- R:d d )        core-ext        two_r_fetch
1.1       anton    1285: :
                   1286:  i' j ;
                   1287: 
1.136     pazsan   1288: 2rdrop ( R:d -- )              gforth  two_r_drop
1.1       anton    1289: :
                   1290:  r> r> drop r> drop >r ;
                   1291: 
1.47      anton    1292: over   ( w1 w2 -- w1 w2 w1 )           core
1.1       anton    1293: :
                   1294:  sp@ cell+ @ ;
                   1295: 
1.47      anton    1296: drop   ( w -- )                core
1.1       anton    1297: :
                   1298:  IF THEN ;
                   1299: 
1.47      anton    1300: swap   ( w1 w2 -- w2 w1 )              core
1.1       anton    1301: :
                   1302:  >r (swap) ! r> (swap) @ ;
                   1303: Variable (swap)
                   1304: 
1.47      anton    1305: dup    ( w -- w w )            core    dupe
1.1       anton    1306: :
                   1307:  sp@ @ ;
                   1308: 
1.47      anton    1309: rot    ( w1 w2 w3 -- w2 w3 w1 )        core    rote
1.1       anton    1310: :
                   1311: [ defined? (swap) [IF] ]
                   1312:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
                   1313: Variable (rot)
                   1314: [ELSE] ]
                   1315:     >r swap r> swap ;
                   1316: [THEN]
                   1317: 
1.47      anton    1318: -rot   ( w1 w2 w3 -- w3 w1 w2 )        gforth  not_rote
1.1       anton    1319: :
                   1320:  rot rot ;
                   1321: 
1.47      anton    1322: nip    ( w1 w2 -- w2 )         core-ext
1.1       anton    1323: :
1.6       jwilke   1324:  swap drop ;
1.1       anton    1325: 
1.47      anton    1326: tuck   ( w1 w2 -- w2 w1 w2 )   core-ext
1.1       anton    1327: :
                   1328:  swap over ;
                   1329: 
1.172     anton    1330: ?dup   ( w -- S:... w )        core    question_dupe
1.52      anton    1331: ""Actually the stack effect is: @code{( w -- 0 | w w )}.  It performs a
                   1332: @code{dup} if w is nonzero.""
1.1       anton    1333: if (w!=0) {
                   1334:   *--sp = w;
                   1335: }
                   1336: :
                   1337:  dup IF dup THEN ;
                   1338: 
1.172     anton    1339: pick   ( S:... u -- S:... w )          core-ext
1.52      anton    1340: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1.172     anton    1341: w = sp[u];
1.1       anton    1342: :
                   1343:  1+ cells sp@ + @ ;
                   1344: 
1.47      anton    1345: 2drop  ( w1 w2 -- )            core    two_drop
1.1       anton    1346: :
                   1347:  drop drop ;
                   1348: 
1.47      anton    1349: 2dup   ( w1 w2 -- w1 w2 w1 w2 )        core    two_dupe
1.1       anton    1350: :
                   1351:  over over ;
                   1352: 
1.47      anton    1353: 2over  ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )    core    two_over
1.1       anton    1354: :
                   1355:  3 pick 3 pick ;
                   1356: 
1.47      anton    1357: 2swap  ( w1 w2 w3 w4 -- w3 w4 w1 w2 )  core    two_swap
1.1       anton    1358: :
                   1359:  rot >r rot r> ;
                   1360: 
1.47      anton    1361: 2rot   ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )      double-ext      two_rote
1.1       anton    1362: :
                   1363:  >r >r 2swap r> r> 2swap ;
                   1364: 
1.47      anton    1365: 2nip   ( w1 w2 w3 w4 -- w3 w4 )        gforth  two_nip
1.1       anton    1366: :
                   1367:  2swap 2drop ;
                   1368: 
1.47      anton    1369: 2tuck  ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )    gforth  two_tuck
1.1       anton    1370: :
                   1371:  2swap 2over ;
                   1372: 
                   1373: \ toggle is high-level: 0.11/0.42%
                   1374: 
1.110     pazsan   1375: \g memory
                   1376: 
1.47      anton    1377: @      ( a_addr -- w )         core    fetch
1.52      anton    1378: ""@i{w} is the cell stored at @i{a_addr}.""
1.1       anton    1379: w = *a_addr;
                   1380: 
1.112     pazsan   1381: \ lit@ / lit_fetch = lit @
                   1382: 
                   1383: lit@           ( #a_addr -- w ) new    lit_fetch
                   1384: w = *a_addr;
                   1385: 
1.47      anton    1386: !      ( w a_addr -- )         core    store
1.52      anton    1387: ""Store @i{w} into the cell at @i{a-addr}.""
1.1       anton    1388: *a_addr = w;
                   1389: 
1.47      anton    1390: +!     ( n a_addr -- )         core    plus_store
1.52      anton    1391: ""Add @i{n} to the cell at @i{a-addr}.""
1.1       anton    1392: *a_addr += n;
                   1393: :
                   1394:  tuck @ + swap ! ;
                   1395: 
1.47      anton    1396: c@     ( c_addr -- c )         core    c_fetch
1.52      anton    1397: ""@i{c} is the char stored at @i{c_addr}.""
1.1       anton    1398: c = *c_addr;
                   1399: :
                   1400: [ bigendian [IF] ]
                   1401:     [ cell>bit 4 = [IF] ]
                   1402:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1403:        IF  $FF and  ELSE  8>>  THEN  ;
                   1404:     [ [ELSE] ]
                   1405:        dup [ cell 1- ] literal and
                   1406:        tuck - @ swap [ cell 1- ] literal xor
                   1407:        0 ?DO 8>> LOOP $FF and
                   1408:     [ [THEN] ]
                   1409: [ [ELSE] ]
                   1410:     [ cell>bit 4 = [IF] ]
                   1411:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1412:        IF  8>>  ELSE  $FF and  THEN
                   1413:     [ [ELSE] ]
                   1414:        dup [ cell  1- ] literal and 
                   1415:        tuck - @ swap
                   1416:        0 ?DO 8>> LOOP 255 and
                   1417:     [ [THEN] ]
                   1418: [ [THEN] ]
                   1419: ;
                   1420: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
                   1421: 
1.47      anton    1422: c!     ( c c_addr -- )         core    c_store
1.52      anton    1423: ""Store @i{c} into the char at @i{c-addr}.""
1.1       anton    1424: *c_addr = c;
                   1425: :
                   1426: [ bigendian [IF] ]
                   1427:     [ cell>bit 4 = [IF] ]
                   1428:        tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
                   1429:        dup -2 and @ over 1 and cells masks + @ and
                   1430:        r> or swap -2 and ! ;
                   1431:        Create masks $00FF , $FF00 ,
                   1432:     [ELSE] ]
                   1433:        dup [ cell 1- ] literal and dup 
                   1434:        [ cell 1- ] literal xor >r
                   1435:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1436:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1437:     [THEN]
                   1438: [ELSE] ]
                   1439:     [ cell>bit 4 = [IF] ]
                   1440:        tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
                   1441:        dup -2 and @ over 1 and cells masks + @ and
                   1442:        r> or swap -2 and ! ;
                   1443:        Create masks $FF00 , $00FF ,
                   1444:     [ELSE] ]
                   1445:        dup [ cell 1- ] literal and dup >r
                   1446:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1447:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1448:     [THEN]
                   1449: [THEN]
                   1450: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
                   1451: 
1.47      anton    1452: 2!     ( w1 w2 a_addr -- )             core    two_store
1.52      anton    1453: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1.1       anton    1454: a_addr[0] = w2;
                   1455: a_addr[1] = w1;
                   1456: :
                   1457:  tuck ! cell+ ! ;
                   1458: 
1.47      anton    1459: 2@     ( a_addr -- w1 w2 )             core    two_fetch
1.52      anton    1460: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
                   1461: the content of the next cell.""
1.1       anton    1462: w2 = a_addr[0];
                   1463: w1 = a_addr[1];
                   1464: :
                   1465:  dup cell+ @ swap @ ;
                   1466: 
1.47      anton    1467: cell+  ( a_addr1 -- a_addr2 )  core    cell_plus
1.52      anton    1468: ""@code{1 cells +}""
1.1       anton    1469: a_addr2 = a_addr1+1;
                   1470: :
                   1471:  cell + ;
                   1472: 
1.47      anton    1473: cells  ( n1 -- n2 )            core
1.52      anton    1474: "" @i{n2} is the number of address units of @i{n1} cells.""
1.1       anton    1475: n2 = n1 * sizeof(Cell);
                   1476: :
                   1477:  [ cell
                   1478:  2/ dup [IF] ] 2* [ [THEN]
                   1479:  2/ dup [IF] ] 2* [ [THEN]
                   1480:  2/ dup [IF] ] 2* [ [THEN]
                   1481:  2/ dup [IF] ] 2* [ [THEN]
                   1482:  drop ] ;
                   1483: 
1.47      anton    1484: char+  ( c_addr1 -- c_addr2 )  core    char_plus
1.52      anton    1485: ""@code{1 chars +}.""
1.1       anton    1486: c_addr2 = c_addr1 + 1;
                   1487: :
                   1488:  1+ ;
                   1489: 
1.47      anton    1490: (chars)        ( n1 -- n2 )    gforth  paren_chars
1.1       anton    1491: n2 = n1 * sizeof(Char);
                   1492: :
                   1493:  ;
                   1494: 
1.47      anton    1495: count  ( c_addr1 -- c_addr2 u )        core
1.56      anton    1496: ""@i{c-addr2} is the first character and @i{u} the length of the
                   1497: counted string at @i{c-addr1}.""
1.1       anton    1498: u = *c_addr1;
                   1499: c_addr2 = c_addr1+1;
                   1500: :
                   1501:  dup 1+ swap c@ ;
                   1502: 
1.110     pazsan   1503: \g compiler
                   1504: 
1.138     pazsan   1505: \+f83headerstring
                   1506: 
                   1507: (f83find)      ( c_addr u f83name1 -- f83name2 )       new     paren_f83find
                   1508: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
                   1509:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1510:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1511:     break;
                   1512: f83name2=f83name1;
1.210     pazsan   1513: #ifdef DEBUG
                   1514: fprintf(stderr, "F83find ");
                   1515: fwrite(c_addr, u, 1, stderr);
                   1516: fprintf(stderr, " found %08x\n", f83name2); 
                   1517: #endif
1.138     pazsan   1518: :
                   1519:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
                   1520:        >r 2dup r@ cell+ char+ capscomp  0=
                   1521:        IF  2drop r>  EXIT  THEN
                   1522:        r> @
                   1523:     REPEAT  THEN  nip nip ;
                   1524: : (find-samelen) ( u f83name1 -- u f83name2/0 )
                   1525:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL  THEN ;
                   1526: : capscomp ( c_addr1 u c_addr2 -- n )
                   1527:  swap bounds
                   1528:  ?DO  dup c@ I c@ <>
                   1529:      IF  dup c@ toupper I c@ toupper =
                   1530:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1531:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1532: : sgn ( n -- -1/0/1 )
                   1533:  dup 0= IF EXIT THEN  0< 2* 1+ ;
                   1534: 
                   1535: \-
                   1536: 
1.112     pazsan   1537: (listlfind)    ( c_addr u longname1 -- longname2 )     new     paren_listlfind
1.125     anton    1538: longname2=listlfind(c_addr, u, longname1);
1.1       anton    1539: :
1.112     pazsan   1540:     BEGIN  dup WHILE  (findl-samelen)  dup  WHILE
                   1541:        >r 2dup r@ cell+ cell+ capscomp  0=
1.1       anton    1542:        IF  2drop r>  EXIT  THEN
                   1543:        r> @
                   1544:     REPEAT  THEN  nip nip ;
1.112     pazsan   1545: : (findl-samelen) ( u longname1 -- u longname2/0 )
                   1546:     BEGIN  2dup cell+ @ lcount-mask and <> WHILE  @  dup 0= UNTIL  THEN ;
1.144     pazsan   1547: : capscomp ( c_addr1 u c_addr2 -- n )
                   1548:  swap bounds
                   1549:  ?DO  dup c@ I c@ <>
                   1550:      IF  dup c@ toupper I c@ toupper =
                   1551:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                   1552:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
                   1553: : sgn ( n -- -1/0/1 )
                   1554:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1555: 
1.15      pazsan   1556: \+hash
1.1       anton    1557: 
1.112     pazsan   1558: (hashlfind)    ( c_addr u a_addr -- longname2 )        new     paren_hashlfind
1.125     anton    1559: longname2 = hashlfind(c_addr, u, a_addr);
1.1       anton    1560: :
                   1561:  BEGIN  dup  WHILE
1.112     pazsan   1562:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1563:         IF  2dup r@ cell+ cell+ capscomp 0=
1.1       anton    1564:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1565:        rdrop r>
                   1566:  REPEAT nip nip ;
                   1567: 
1.112     pazsan   1568: (tablelfind)   ( c_addr u a_addr -- longname2 )        new     paren_tablelfind
1.1       anton    1569: ""A case-sensitive variant of @code{(hashfind)}""
1.125     anton    1570: longname2 = tablelfind(c_addr, u, a_addr);
1.1       anton    1571: :
                   1572:  BEGIN  dup  WHILE
1.112     pazsan   1573:         2@ >r >r dup r@ cell+ @ lcount-mask and =
                   1574:         IF  2dup r@ cell+ cell+ -text 0=
1.1       anton    1575:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1576:        rdrop r>
                   1577:  REPEAT nip nip ;
1.138     pazsan   1578: : -text ( c_addr1 u c_addr2 -- n )
                   1579:  swap bounds
                   1580:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                   1581:  ELSE  c@ I c@ - unloop  THEN  sgn ;
                   1582: : sgn ( n -- -1/0/1 )
                   1583:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton    1584: 
1.47      anton    1585: (hashkey1)     ( c_addr u ubits -- ukey )              gforth  paren_hashkey1
1.1       anton    1586: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
1.125     anton    1587: ukey = hashkey1(c_addr, u, ubits);
1.1       anton    1588: :
                   1589:  dup rot-values + c@ over 1 swap lshift 1- >r
                   1590:  tuck - 2swap r> 0 2swap bounds
                   1591:  ?DO  dup 4 pick lshift swap 3 pick rshift or
                   1592:       I c@ toupper xor
                   1593:       over and  LOOP
                   1594:  nip nip nip ;
                   1595: Create rot-values
                   1596:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
                   1597:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
                   1598:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
                   1599:   7 c, 5 c, 5 c,
1.138     pazsan   1600: 
                   1601: \+
1.1       anton    1602: 
1.15      pazsan   1603: \+
1.1       anton    1604: 
1.47      anton    1605: (parse-white)  ( c_addr1 u1 -- c_addr2 u2 )    gforth  paren_parse_white
1.125     anton    1606: struct Cellpair r=parse_white(c_addr1, u1);
                   1607: c_addr2 = (Char *)(r.n1);
                   1608: u2 = r.n2;
1.1       anton    1609: :
                   1610:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
                   1611:  REPEAT  THEN  2dup
                   1612:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
                   1613:  REPEAT  THEN  nip - ;
                   1614: 
1.47      anton    1615: aligned        ( c_addr -- a_addr )    core
1.29      crook    1616: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1617: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
                   1618: :
                   1619:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                   1620: 
1.47      anton    1621: faligned       ( c_addr -- f_addr )    float   f_aligned
1.29      crook    1622: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1623: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
                   1624: :
                   1625:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
                   1626: 
1.35      jwilke   1627: \ threading stuff is currently only interesting if we have a compiler
                   1628: \fhas? standardthreading has? compiler and [IF]
1.47      anton    1629: threading-method       ( -- n )        gforth  threading_method
1.1       anton    1630: ""0 if the engine is direct threaded. Note that this may change during
                   1631: the lifetime of an image.""
                   1632: #if defined(DOUBLY_INDIRECT)
                   1633: n=2;
                   1634: #else
                   1635: # if defined(DIRECT_THREADED)
                   1636: n=0;
                   1637: # else
                   1638: n=1;
                   1639: # endif
                   1640: #endif
                   1641: :
                   1642:  1 ;
1.28      jwilke   1643: 
1.35      jwilke   1644: \f[THEN]
1.1       anton    1645: 
1.83      pazsan   1646: \g hostos
                   1647: 
1.192     anton    1648: key-file       ( wfileid -- c )                gforth  paren_key_file
1.193     anton    1649: ""Read one character @i{c} from @i{wfileid}.  This word disables
                   1650: buffering for @i{wfileid}.  If you want to read characters from a
                   1651: terminal in non-canonical (raw) mode, you have to put the terminal in
                   1652: non-canonical mode yourself (using the C interface); the exception is
                   1653: @code{stdin}: Gforth automatically puts it into non-canonical mode.""
1.17      pazsan   1654: #ifdef HAS_FILE
1.1       anton    1655: fflush(stdout);
1.192     anton    1656: c = key((FILE*)wfileid);
1.17      pazsan   1657: #else
1.192     anton    1658: c = key(stdin);
1.17      pazsan   1659: #endif
1.1       anton    1660: 
1.192     anton    1661: key?-file      ( wfileid -- f )                gforth  key_q_file
                   1662: ""@i{f} is true if at least one character can be read from @i{wfileid}
1.193     anton    1663: without blocking.  If you also want to use @code{read-file} or
                   1664: @code{read-line} on the file, you have to call @code{key?-file} or
                   1665: @code{key-file} first (these two words disable buffering).""
1.17      pazsan   1666: #ifdef HAS_FILE
1.1       anton    1667: fflush(stdout);
1.192     anton    1668: f = key_query((FILE*)wfileid);
1.17      pazsan   1669: #else
1.192     anton    1670: f = key_query(stdin);
1.17      pazsan   1671: #endif
                   1672: 
1.47      anton    1673: stdin  ( -- wfileid )  gforth
1.193     anton    1674: ""The standard input file of the Gforth process.""
1.12      pazsan   1675: wfileid = (Cell)stdin;
1.1       anton    1676: 
1.47      anton    1677: stdout ( -- wfileid )  gforth
1.193     anton    1678: ""The standard output file of the Gforth process.""
1.1       anton    1679: wfileid = (Cell)stdout;
                   1680: 
1.47      anton    1681: stderr ( -- wfileid )  gforth
1.193     anton    1682: ""The standard error output file of the Gforth process.""
1.1       anton    1683: wfileid = (Cell)stderr;
                   1684: 
1.208     pazsan   1685: \+os
                   1686: 
1.47      anton    1687: form   ( -- urows ucols )      gforth
1.209     anton    1688: ""The number of lines and columns in the terminal. These numbers may
                   1689: change with the window size.  Note that it depends on the OS whether
                   1690: this reflects the actual size and changes with the window size
                   1691: (currently only on Unix-like OSs).  On other OSs you just get a
                   1692: default, and can tell Gforth the terminal size by setting the
                   1693: environment variables @code{COLUMNS} and @code{LINES} before starting
                   1694: Gforth.""
1.1       anton    1695: /* we could block SIGWINCH here to get a consistent size, but I don't
                   1696:  think this is necessary or always beneficial */
                   1697: urows=rows;
                   1698: ucols=cols;
                   1699: 
1.189     pazsan   1700: wcwidth        ( u -- n )      gforth
                   1701: ""The number of fixed-width characters per unicode character u""
1.238     anton    1702: #ifdef HAVE_WCWIDTH
1.189     pazsan   1703: n = wcwidth(u);
1.238     anton    1704: #else
                   1705: n = 1;
                   1706: #endif
1.189     pazsan   1707: 
1.47      anton    1708: flush-icache   ( c_addr u -- ) gforth  flush_icache
1.1       anton    1709: ""Make sure that the instruction cache of the processor (if there is
1.29      crook    1710: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1.1       anton    1711: afterwards. @code{END-CODE} performs a @code{flush-icache}
                   1712: automatically. Caveat: @code{flush-icache} might not work on your
                   1713: installation; this is usually the case if direct threading is not
                   1714: supported on your machine (take a look at your @file{machine.h}) and
                   1715: your machine has a separate instruction cache. In such cases,
                   1716: @code{flush-icache} does nothing instead of flushing the instruction
                   1717: cache.""
1.233     anton    1718: FLUSH_ICACHE((caddr_t)c_addr,u);
1.1       anton    1719: 
1.47      anton    1720: (bye)  ( n -- )        gforth  paren_bye
1.77      anton    1721: SUPER_END;
1.1       anton    1722: return (Label *)n;
                   1723: 
1.125     anton    1724: (system)       ( c_addr u -- wretval wior )    gforth  paren_system
1.155     anton    1725: wretval = gforth_system(c_addr, u);  
1.1       anton    1726: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
                   1727: 
1.47      anton    1728: getenv ( c_addr1 u1 -- c_addr2 u2 )    gforth
1.29      crook    1729: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1.24      crook    1730: is the host operating system's expansion of that environment variable. If the
1.29      crook    1731: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1.24      crook    1732: in length.""
1.46      pazsan   1733: /* close ' to keep fontify happy */
1.190     pazsan   1734: c_addr2 = (Char *)getenv(cstr(c_addr1,u1,1));
                   1735: u2 = (c_addr2 == NULL ? 0 : strlen((char *)c_addr2));
1.1       anton    1736: 
1.56      anton    1737: open-pipe      ( c_addr u wfam -- wfileid wior )       gforth  open_pipe
1.239     anton    1738: fflush(stdout);
1.84      pazsan   1739: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1.1       anton    1740: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
                   1741: 
1.47      anton    1742: close-pipe     ( wfileid -- wretval wior )             gforth  close_pipe
1.1       anton    1743: wretval = pclose((FILE *)wfileid);
                   1744: wior = IOR(wretval==-1);
                   1745: 
1.47      anton    1746: time&date      ( -- nsec nmin nhour nday nmonth nyear )        facility-ext    time_and_date
1.44      crook    1747: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
                   1748: Months are numbered from 1.""
1.127     anton    1749: #if 1
                   1750: time_t now;
                   1751: struct tm *ltime;
                   1752: time(&now);
                   1753: ltime=localtime(&now);
                   1754: #else
1.1       anton    1755: struct timeval time1;
                   1756: struct timezone zone1;
                   1757: struct tm *ltime;
                   1758: gettimeofday(&time1,&zone1);
1.51      anton    1759: /* !! Single Unix specification: 
                   1760:    If tzp is not a null pointer, the behaviour is unspecified. */
1.1       anton    1761: ltime=localtime((time_t *)&time1.tv_sec);
1.127     anton    1762: #endif
1.1       anton    1763: nyear =ltime->tm_year+1900;
                   1764: nmonth=ltime->tm_mon+1;
                   1765: nday  =ltime->tm_mday;
                   1766: nhour =ltime->tm_hour;
                   1767: nmin  =ltime->tm_min;
                   1768: nsec  =ltime->tm_sec;
                   1769: 
1.212     anton    1770: ms     ( u -- )        facility-ext
1.44      crook    1771: ""Wait at least @i{n} milli-second.""
1.212     anton    1772: gforth_ms(u);
1.1       anton    1773: 
1.47      anton    1774: allocate       ( u -- a_addr wior )    memory
1.29      crook    1775: ""Allocate @i{u} address units of contiguous data space. The initial
1.27      crook    1776: contents of the data space is undefined. If the allocation is successful,
1.29      crook    1777: @i{a-addr} is the start address of the allocated region and @i{wior}
                   1778: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1.52      anton    1779: is a non-zero I/O result code.""
1.1       anton    1780: a_addr = (Cell *)malloc(u?u:1);
                   1781: wior = IOR(a_addr==NULL);
                   1782: 
1.47      anton    1783: free   ( a_addr -- wior )              memory
1.29      crook    1784: ""Return the region of data space starting at @i{a-addr} to the system.
1.52      anton    1785: The region must originally have been obtained using @code{allocate} or
1.29      crook    1786: @code{resize}. If the operational is successful, @i{wior} is 0.
1.52      anton    1787: If the operation fails, @i{wior} is a non-zero I/O result code.""
1.1       anton    1788: free(a_addr);
                   1789: wior = 0;
                   1790: 
1.47      anton    1791: resize ( a_addr1 u -- a_addr2 wior )   memory
1.26      crook    1792: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1.1       anton    1793: address units, possibly moving the contents to a different
1.27      crook    1794: area. @i{a-addr2} is the address of the resulting area.
1.52      anton    1795: If the operation is successful, @i{wior} is 0.
                   1796: If the operation fails, @i{wior} is a non-zero
1.29      crook    1797: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1.27      crook    1798: @code{resize} @code{allocate}s @i{u} address units.""
1.1       anton    1799: /* the following check is not necessary on most OSs, but it is needed
                   1800:    on SunOS 4.1.2. */
1.46      pazsan   1801: /* close ' to keep fontify happy */
1.1       anton    1802: if (a_addr1==NULL)
                   1803:   a_addr2 = (Cell *)malloc(u);
                   1804: else
                   1805:   a_addr2 = (Cell *)realloc(a_addr1, u);
                   1806: wior = IOR(a_addr2==NULL);     /* !! Define a return code */
1.258     anton    1807: if (a_addr2==NULL)
                   1808:   a_addr2 = a_addr1;
1.1       anton    1809: 
1.47      anton    1810: strerror       ( n -- c_addr u )       gforth
1.190     pazsan   1811: c_addr = (Char *)strerror(n);
                   1812: u = strlen((char *)c_addr);
1.1       anton    1813: 
1.47      anton    1814: strsignal      ( n -- c_addr u )       gforth
1.190     pazsan   1815: c_addr = (Char *)strsignal(n);
                   1816: u = strlen((char *)c_addr);
1.1       anton    1817: 
1.172     anton    1818: call-c ( ... w -- ... )        gforth  call_c
1.1       anton    1819: ""Call the C function pointed to by @i{w}. The C function has to
                   1820: access the stack itself. The stack pointers are exported in the global
1.213     anton    1821: variables @code{gforth_SP} and @code{gforth_FP}.""
1.1       anton    1822: /* This is a first attempt at support for calls to C. This may change in
                   1823:    the future */
1.231     pazsan   1824: IF_fpTOS(fp[0]=fpTOS);
1.185     pazsan   1825: gforth_FP=fp;
                   1826: gforth_SP=sp;
1.231     pazsan   1827: gforth_RP=rp;
                   1828: gforth_LP=lp;
1.235     pazsan   1829: #ifdef HAS_LINKBACK
1.1       anton    1830: ((void (*)())w)();
1.235     pazsan   1831: #else
                   1832: ((void (*)(void *))w)(gforth_pointers);
                   1833: #endif
1.185     pazsan   1834: sp=gforth_SP;
                   1835: fp=gforth_FP;
1.231     pazsan   1836: rp=gforth_RP;
                   1837: lp=gforth_LP;
                   1838: IF_fpTOS(fpTOS=fp[0]);
1.1       anton    1839: 
1.15      pazsan   1840: \+
                   1841: \+file
1.1       anton    1842: 
1.47      anton    1843: close-file     ( wfileid -- wior )             file    close_file
1.1       anton    1844: wior = IOR(fclose((FILE *)wfileid)==EOF);
                   1845: 
1.56      anton    1846: open-file      ( c_addr u wfam -- wfileid wior )       file    open_file
1.217     anton    1847: wfileid = opencreate_file(tilde_cstr(c_addr,u,1), wfam, 0, &wior);
1.1       anton    1848: 
1.56      anton    1849: create-file    ( c_addr u wfam -- wfileid wior )       file    create_file
1.217     anton    1850: wfileid = opencreate_file(tilde_cstr(c_addr,u,1), wfam, O_CREAT|O_TRUNC, &wior);
1.1       anton    1851: 
1.47      anton    1852: delete-file    ( c_addr u -- wior )            file    delete_file
1.1       anton    1853: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
                   1854: 
1.47      anton    1855: rename-file    ( c_addr1 u1 c_addr2 u2 -- wior )       file-ext        rename_file
1.29      crook    1856: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1.125     anton    1857: wior = rename_file(c_addr1, u1, c_addr2, u2);
1.1       anton    1858: 
1.47      anton    1859: file-position  ( wfileid -- ud wior )  file    file_position
1.1       anton    1860: /* !! use tell and lseek? */
1.108     anton    1861: ud = OFF2UD(ftello((FILE *)wfileid));
                   1862: wior = IOR(UD2OFF(ud)==-1);
1.1       anton    1863: 
1.47      anton    1864: reposition-file        ( ud wfileid -- wior )  file    reposition_file
1.108     anton    1865: wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1.1       anton    1866: 
1.47      anton    1867: file-size      ( wfileid -- ud wior )  file    file_size
1.1       anton    1868: struct stat buf;
                   1869: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1.108     anton    1870: ud = OFF2UD(buf.st_size);
1.1       anton    1871: 
1.47      anton    1872: resize-file    ( ud wfileid -- wior )  file    resize_file
1.108     anton    1873: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1.1       anton    1874: 
1.47      anton    1875: read-file      ( c_addr u1 wfileid -- u2 wior )        file    read_file
1.1       anton    1876: /* !! fread does not guarantee enough */
                   1877: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1.243     anton    1878: if (u2>0)
                   1879:    gf_regetc((FILE *)wfileid);
1.1       anton    1880: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1881: /* !! is the value of ferror errno-compatible? */
                   1882: if (wior)
                   1883:   clearerr((FILE *)wfileid);
                   1884: 
1.125     anton    1885: (read-line)    ( c_addr u1 wfileid -- u2 flag u3 wior ) file   paren_read_line
1.243     anton    1886: struct Cellquad r = read_line(c_addr, u1, (FILE *)wfileid);
1.125     anton    1887: u2   = r.n1;
                   1888: flag = r.n2;
                   1889: u3   = r.n3;
                   1890: wior = r.n4;
1.1       anton    1891: 
1.15      pazsan   1892: \+
1.1       anton    1893: 
1.47      anton    1894: write-file     ( c_addr u1 wfileid -- wior )   file    write_file
1.1       anton    1895: /* !! fwrite does not guarantee enough */
1.39      pazsan   1896: #ifdef HAS_FILE
1.1       anton    1897: {
                   1898:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1899:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1900:   if (wior)
                   1901:     clearerr((FILE *)wfileid);
                   1902: }
1.39      pazsan   1903: #else
                   1904: TYPE(c_addr, u1);
                   1905: #endif
1.17      pazsan   1906: 
1.47      anton    1907: emit-file      ( c wfileid -- wior )   gforth  emit_file
1.17      pazsan   1908: #ifdef HAS_FILE
1.1       anton    1909: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
                   1910: if (wior)
                   1911:   clearerr((FILE *)wfileid);
1.17      pazsan   1912: #else
1.36      pazsan   1913: PUTC(c);
1.17      pazsan   1914: #endif
1.1       anton    1915: 
1.15      pazsan   1916: \+file
1.1       anton    1917: 
1.47      anton    1918: flush-file     ( wfileid -- wior )             file-ext        flush_file
1.1       anton    1919: wior = IOR(fflush((FILE *) wfileid)==EOF);
                   1920: 
1.56      anton    1921: file-status    ( c_addr u -- wfam wior )       file-ext        file_status
1.125     anton    1922: struct Cellpair r = file_status(c_addr, u);
                   1923: wfam = r.n1;
                   1924: wior = r.n2;
1.1       anton    1925: 
1.112     pazsan   1926: file-eof?      ( wfileid -- flag )     gforth  file_eof_query
                   1927: flag = FLAG(feof((FILE *) wfileid));
1.1       anton    1928: 
1.112     pazsan   1929: open-dir       ( c_addr u -- wdirid wior )     gforth  open_dir
                   1930: ""Open the directory specified by @i{c-addr, u}
                   1931: and return @i{dir-id} for futher access to it.""
                   1932: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
                   1933: wior =  IOR(wdirid == 0);
                   1934: 
                   1935: read-dir       ( c_addr u1 wdirid -- u2 flag wior )    gforth  read_dir
                   1936: ""Attempt to read the next entry from the directory specified
                   1937: by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}. 
                   1938: If the attempt fails because there is no more entries,
                   1939: @i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
                   1940: If the attempt to read the next entry fails because of any other reason, 
                   1941: return @i{ior}<>0.
                   1942: If the attempt succeeds, store file name to the buffer at @i{c-addr}
                   1943: and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
                   1944: If the length of the file name is greater than @i{u1}, 
                   1945: store first @i{u1} characters from file name into the buffer and
                   1946: indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
                   1947: struct dirent * dent;
                   1948: dent = readdir((DIR *)wdirid);
                   1949: wior = 0;
                   1950: flag = -1;
                   1951: if(dent == NULL) {
                   1952:   u2 = 0;
                   1953:   flag = 0;
                   1954: } else {
1.190     pazsan   1955:   u2 = strlen((char *)dent->d_name);
1.112     pazsan   1956:   if(u2 > u1) {
                   1957:     u2 = u1;
                   1958:     wior = -512-ENAMETOOLONG;
                   1959:   }
                   1960:   memmove(c_addr, dent->d_name, u2);
                   1961: }
                   1962: 
                   1963: close-dir      ( wdirid -- wior )      gforth  close_dir
                   1964: ""Close the directory specified by @i{dir-id}.""
                   1965: wior = IOR(closedir((DIR *)wdirid));
                   1966: 
                   1967: filename-match ( c_addr1 u1 c_addr2 u2 -- flag )       gforth  match_file
                   1968: char * string = cstr(c_addr1, u1, 1);
                   1969: char * pattern = cstr(c_addr2, u2, 0);
                   1970: flag = FLAG(!fnmatch(pattern, string, 0));
                   1971: 
1.157     pazsan   1972: set-dir        ( c_addr u -- wior )    gforth set_dir
                   1973: ""Change the current directory to @i{c-addr, u}.
                   1974: Return an error if this is not possible""
                   1975: wior = IOR(chdir(tilde_cstr(c_addr, u, 1)));
                   1976: 
                   1977: get-dir        ( c_addr1 u1 -- c_addr2 u2 )    gforth get_dir
1.236     anton    1978: ""Store the current directory in the buffer specified by @i{c-addr1, u1}.
1.157     pazsan   1979: If the buffer size is not sufficient, return 0 0""
1.190     pazsan   1980: c_addr2 = (Char *)getcwd((char *)c_addr1, u1);
1.157     pazsan   1981: if(c_addr2 != NULL) {
1.190     pazsan   1982:   u2 = strlen((char *)c_addr2);
1.157     pazsan   1983: } else {
                   1984:   u2 = 0;
                   1985: }
                   1986: 
1.236     anton    1987: =mkdir ( c_addr u wmode -- wior )        gforth equals_mkdir
                   1988: ""Create directory @i{c-addr u} with mode @i{wmode}.""
                   1989: wior = IOR(mkdir(tilde_cstr(c_addr,u,1),wmode));
                   1990: 
1.112     pazsan   1991: \+
                   1992: 
                   1993: newline        ( -- c_addr u ) gforth
                   1994: ""String containing the newline sequence of the host OS""
                   1995: char newline[] = {
1.115     anton    1996: #if DIRSEP=='/'
                   1997: /* Unix */
1.112     pazsan   1998: '\n'
                   1999: #else
1.115     anton    2000: /* DOS, Win, OS/2 */
1.112     pazsan   2001: '\r','\n'
                   2002: #endif
                   2003: };
1.190     pazsan   2004: c_addr=(Char *)newline;
1.112     pazsan   2005: u=sizeof(newline);
                   2006: :
                   2007:  "newline count ;
                   2008: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
                   2009: 
                   2010: \+os
                   2011: 
                   2012: utime  ( -- dtime )    gforth
                   2013: ""Report the current time in microseconds since some epoch.""
                   2014: struct timeval time1;
                   2015: gettimeofday(&time1,NULL);
                   2016: dtime = timeval2us(&time1);
                   2017: 
                   2018: cputime ( -- duser dsystem ) gforth
                   2019: ""duser and dsystem are the respective user- and system-level CPU
                   2020: times used since the start of the Forth system (excluding child
                   2021: processes), in microseconds (the granularity may be much larger,
                   2022: however).  On platforms without the getrusage call, it reports elapsed
                   2023: time (since some epoch) for duser and 0 for dsystem.""
                   2024: #ifdef HAVE_GETRUSAGE
                   2025: struct rusage usage;
                   2026: getrusage(RUSAGE_SELF, &usage);
                   2027: duser = timeval2us(&usage.ru_utime);
                   2028: dsystem = timeval2us(&usage.ru_stime);
                   2029: #else
                   2030: struct timeval time1;
                   2031: gettimeofday(&time1,NULL);
                   2032: duser = timeval2us(&time1);
1.158     pazsan   2033: dsystem = DZERO;
1.112     pazsan   2034: #endif
                   2035: 
1.259     pazsan   2036: ntime  ( -- dtime )    gforth
                   2037: ""Report the current time in nanoseconds since some epoch.""
1.262   ! pazsan   2038: struct timespec time1;
1.261     pazsan   2039: #ifdef HAVE_CLOCK_GETTIME
1.260     pazsan   2040: clock_gettime(CLOCK_REALTIME,&time1);
1.261     pazsan   2041: #else
1.262   ! pazsan   2042: struct timeval time2;
        !          2043: gettimeofday(&time2,NULL);
        !          2044: time1.tv_sec = time2.tv_sec;
        !          2045: time1.tv_nsec = time2.tv_usec*1000;
1.261     pazsan   2046: #endif
1.262   ! pazsan   2047: dtime = timespec2ns(&time1);
1.259     pazsan   2048: 
1.112     pazsan   2049: \+
                   2050: 
                   2051: \+floating
                   2052: 
                   2053: \g floating
1.83      pazsan   2054: 
1.1       anton    2055: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
                   2056: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
                   2057: 
1.177     pazsan   2058: s>f    ( n -- r )              float   s_to_f
                   2059: r = n;
                   2060: 
1.47      anton    2061: d>f    ( d -- r )              float   d_to_f
1.158     pazsan   2062: #ifdef BUGGY_LL_D2F
1.1       anton    2063: extern double ldexp(double x, int exp);
1.158     pazsan   2064: if (DHI(d)<0) {
                   2065: #ifdef BUGGY_LL_ADD
1.113     anton    2066:   DCell d2=dnegate(d);
1.158     pazsan   2067: #else
                   2068:   DCell d2=-d;
                   2069: #endif
                   2070:   r = -(ldexp((Float)DHI(d2),CELL_BITS) + (Float)DLO(d2));
1.113     anton    2071: } else
1.158     pazsan   2072:   r = ldexp((Float)DHI(d),CELL_BITS) + (Float)DLO(d);
1.1       anton    2073: #else
                   2074: r = d;
                   2075: #endif
                   2076: 
1.47      anton    2077: f>d    ( r -- d )              float   f_to_d
1.100     pazsan   2078: extern DCell double2ll(Float r);
                   2079: d = double2ll(r);
1.1       anton    2080: 
1.177     pazsan   2081: f>s    ( r -- n )              float   f_to_s
                   2082: n = (Cell)r;
                   2083: 
1.47      anton    2084: f!     ( r f_addr -- ) float   f_store
1.52      anton    2085: ""Store @i{r} into the float at address @i{f-addr}.""
1.1       anton    2086: *f_addr = r;
                   2087: 
1.47      anton    2088: f@     ( f_addr -- r ) float   f_fetch
1.52      anton    2089: ""@i{r} is the float at address @i{f-addr}.""
1.1       anton    2090: r = *f_addr;
                   2091: 
1.47      anton    2092: df@    ( df_addr -- r )        float-ext       d_f_fetch
1.52      anton    2093: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1.1       anton    2094: #ifdef IEEE_FP
                   2095: r = *df_addr;
                   2096: #else
                   2097: !! df@
                   2098: #endif
                   2099: 
1.47      anton    2100: df!    ( r df_addr -- )        float-ext       d_f_store
1.52      anton    2101: ""Store @i{r} as double-precision IEEE floating-point value to the
                   2102: address @i{df-addr}.""
1.1       anton    2103: #ifdef IEEE_FP
                   2104: *df_addr = r;
                   2105: #else
                   2106: !! df!
                   2107: #endif
                   2108: 
1.47      anton    2109: sf@    ( sf_addr -- r )        float-ext       s_f_fetch
1.52      anton    2110: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1.1       anton    2111: #ifdef IEEE_FP
                   2112: r = *sf_addr;
                   2113: #else
                   2114: !! sf@
                   2115: #endif
                   2116: 
1.47      anton    2117: sf!    ( r sf_addr -- )        float-ext       s_f_store
1.52      anton    2118: ""Store @i{r} as single-precision IEEE floating-point value to the
                   2119: address @i{sf-addr}.""
1.1       anton    2120: #ifdef IEEE_FP
                   2121: *sf_addr = r;
                   2122: #else
                   2123: !! sf!
                   2124: #endif
                   2125: 
1.47      anton    2126: f+     ( r1 r2 -- r3 ) float   f_plus
1.1       anton    2127: r3 = r1+r2;
                   2128: 
1.47      anton    2129: f-     ( r1 r2 -- r3 ) float   f_minus
1.1       anton    2130: r3 = r1-r2;
                   2131: 
1.47      anton    2132: f*     ( r1 r2 -- r3 ) float   f_star
1.1       anton    2133: r3 = r1*r2;
                   2134: 
1.47      anton    2135: f/     ( r1 r2 -- r3 ) float   f_slash
1.1       anton    2136: r3 = r1/r2;
                   2137: 
1.47      anton    2138: f**    ( r1 r2 -- r3 ) float-ext       f_star_star
1.26      crook    2139: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1.1       anton    2140: r3 = pow(r1,r2);
1.177     pazsan   2141: 
                   2142: fm*    ( r1 n -- r2 )  gforth  fm_star
                   2143: r2 = r1*n;
                   2144: 
                   2145: fm/    ( r1 n -- r2 )  gforth  fm_slash
                   2146: r2 = r1/n;
                   2147: 
                   2148: fm*/   ( r1 n1 n2 -- r2 )      gforth  fm_star_slash
                   2149: r2 = (r1*n1)/n2;
                   2150: 
                   2151: f**2   ( r1 -- r2 )    gforth  fm_square
                   2152: r2 = r1*r1;
1.1       anton    2153: 
1.47      anton    2154: fnegate        ( r1 -- r2 )    float   f_negate
1.1       anton    2155: r2 = - r1;
                   2156: 
1.47      anton    2157: fdrop  ( r -- )                float   f_drop
1.1       anton    2158: 
1.47      anton    2159: fdup   ( r -- r r )    float   f_dupe
1.1       anton    2160: 
1.47      anton    2161: fswap  ( r1 r2 -- r2 r1 )      float   f_swap
1.1       anton    2162: 
1.47      anton    2163: fover  ( r1 r2 -- r1 r2 r1 )   float   f_over
1.1       anton    2164: 
1.47      anton    2165: frot   ( r1 r2 r3 -- r2 r3 r1 )        float   f_rote
1.1       anton    2166: 
1.47      anton    2167: fnip   ( r1 r2 -- r2 ) gforth  f_nip
1.1       anton    2168: 
1.47      anton    2169: ftuck  ( r1 r2 -- r2 r1 r2 )   gforth  f_tuck
1.1       anton    2170: 
1.47      anton    2171: float+ ( f_addr1 -- f_addr2 )  float   float_plus
1.52      anton    2172: ""@code{1 floats +}.""
1.1       anton    2173: f_addr2 = f_addr1+1;
                   2174: 
1.47      anton    2175: floats ( n1 -- n2 )    float
1.52      anton    2176: ""@i{n2} is the number of address units of @i{n1} floats.""
1.1       anton    2177: n2 = n1*sizeof(Float);
                   2178: 
1.47      anton    2179: floor  ( r1 -- r2 )    float
1.26      crook    2180: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1.1       anton    2181: /* !! unclear wording */
                   2182: r2 = floor(r1);
                   2183: 
1.216     anton    2184: fround ( r1 -- r2 )    float   f_round
1.105     anton    2185: ""Round to the nearest integral value.""
1.1       anton    2186: r2 = rint(r1);
                   2187: 
1.47      anton    2188: fmax   ( r1 r2 -- r3 ) float   f_max
1.1       anton    2189: if (r1<r2)
                   2190:   r3 = r2;
                   2191: else
                   2192:   r3 = r1;
                   2193: 
1.47      anton    2194: fmin   ( r1 r2 -- r3 ) float   f_min
1.1       anton    2195: if (r1<r2)
                   2196:   r3 = r1;
                   2197: else
                   2198:   r3 = r2;
                   2199: 
1.47      anton    2200: represent      ( r c_addr u -- n f1 f2 )       float
1.1       anton    2201: char *sig;
1.122     anton    2202: size_t siglen;
1.1       anton    2203: int flag;
                   2204: int decpt;
                   2205: sig=ecvt(r, u, &decpt, &flag);
1.122     anton    2206: n=(r==0. ? 1 : decpt);
1.242     anton    2207: flag=signbit(r); /* not all ecvt()s do this as desired */
1.1       anton    2208: f1=FLAG(flag!=0);
1.21      anton    2209: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1.190     pazsan   2210: siglen=strlen((char *)sig);
1.124     anton    2211: if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
                   2212:   siglen=u;
1.170     anton    2213: if (!f2) /* workaround Cygwin trailing 0s for Inf and Nan */
                   2214:   for (; sig[siglen-1]=='0'; siglen--);
                   2215:     ;
1.122     anton    2216: memcpy(c_addr,sig,siglen);
1.123     anton    2217: memset(c_addr+siglen,f2?'0':' ',u-siglen);
1.1       anton    2218: 
1.172     anton    2219: >float ( c_addr u -- f:... flag )      float   to_float
1.56      anton    2220: ""Actual stack effect: ( c_addr u -- r t | f ).  Attempt to convert the
                   2221: character string @i{c-addr u} to internal floating-point
                   2222: representation. If the string represents a valid floating-point number
                   2223: @i{r} is placed on the floating-point stack and @i{flag} is
                   2224: true. Otherwise, @i{flag} is false. A string of blanks is a special
                   2225: case and represents the floating-point number 0.""
1.1       anton    2226: Float r;
1.125     anton    2227: flag = to_float(c_addr, u, &r);
                   2228: if (flag) {
1.172     anton    2229:   fp--;
                   2230:   fp[0]=r;
1.1       anton    2231: }
                   2232: 
1.47      anton    2233: fabs   ( r1 -- r2 )    float-ext       f_abs
1.1       anton    2234: r2 = fabs(r1);
                   2235: 
1.47      anton    2236: facos  ( r1 -- r2 )    float-ext       f_a_cos
1.1       anton    2237: r2 = acos(r1);
                   2238: 
1.47      anton    2239: fasin  ( r1 -- r2 )    float-ext       f_a_sine
1.1       anton    2240: r2 = asin(r1);
                   2241: 
1.47      anton    2242: fatan  ( r1 -- r2 )    float-ext       f_a_tan
1.1       anton    2243: r2 = atan(r1);
                   2244: 
1.47      anton    2245: fatan2 ( r1 r2 -- r3 ) float-ext       f_a_tan_two
1.26      crook    2246: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1.1       anton    2247: intends this to be the inverse of @code{fsincos}. In gforth it is.""
                   2248: r3 = atan2(r1,r2);
                   2249: 
1.47      anton    2250: fcos   ( r1 -- r2 )    float-ext       f_cos
1.1       anton    2251: r2 = cos(r1);
                   2252: 
1.47      anton    2253: fexp   ( r1 -- r2 )    float-ext       f_e_x_p
1.1       anton    2254: r2 = exp(r1);
                   2255: 
1.47      anton    2256: fexpm1 ( r1 -- r2 )    float-ext       f_e_x_p_m_one
1.1       anton    2257: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
                   2258: #ifdef HAVE_EXPM1
1.3       pazsan   2259: extern double
                   2260: #ifdef NeXT
                   2261:               const
                   2262: #endif
                   2263:                     expm1(double);
1.1       anton    2264: r2 = expm1(r1);
                   2265: #else
                   2266: r2 = exp(r1)-1.;
                   2267: #endif
                   2268: 
1.47      anton    2269: fln    ( r1 -- r2 )    float-ext       f_l_n
1.1       anton    2270: r2 = log(r1);
                   2271: 
1.47      anton    2272: flnp1  ( r1 -- r2 )    float-ext       f_l_n_p_one
1.1       anton    2273: ""@i{r2}=ln(@i{r1}+1)""
                   2274: #ifdef HAVE_LOG1P
1.3       pazsan   2275: extern double
                   2276: #ifdef NeXT
                   2277:               const
                   2278: #endif
                   2279:                     log1p(double);
1.1       anton    2280: r2 = log1p(r1);
                   2281: #else
                   2282: r2 = log(r1+1.);
                   2283: #endif
                   2284: 
1.47      anton    2285: flog   ( r1 -- r2 )    float-ext       f_log
1.26      crook    2286: ""The decimal logarithm.""
1.1       anton    2287: r2 = log10(r1);
                   2288: 
1.47      anton    2289: falog  ( r1 -- r2 )    float-ext       f_a_log
1.1       anton    2290: ""@i{r2}=10**@i{r1}""
                   2291: extern double pow10(double);
                   2292: r2 = pow10(r1);
                   2293: 
1.47      anton    2294: fsin   ( r1 -- r2 )    float-ext       f_sine
1.1       anton    2295: r2 = sin(r1);
                   2296: 
1.47      anton    2297: fsincos        ( r1 -- r2 r3 ) float-ext       f_sine_cos
1.1       anton    2298: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
                   2299: r2 = sin(r1);
                   2300: r3 = cos(r1);
                   2301: 
1.47      anton    2302: fsqrt  ( r1 -- r2 )    float-ext       f_square_root
1.1       anton    2303: r2 = sqrt(r1);
                   2304: 
1.47      anton    2305: ftan   ( r1 -- r2 )    float-ext       f_tan
1.1       anton    2306: r2 = tan(r1);
                   2307: :
                   2308:  fsincos f/ ;
                   2309: 
1.47      anton    2310: fsinh  ( r1 -- r2 )    float-ext       f_cinch
1.1       anton    2311: r2 = sinh(r1);
                   2312: :
                   2313:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
                   2314: 
1.47      anton    2315: fcosh  ( r1 -- r2 )    float-ext       f_cosh
1.1       anton    2316: r2 = cosh(r1);
                   2317: :
                   2318:  fexp fdup 1/f f+ f2/ ;
                   2319: 
1.47      anton    2320: ftanh  ( r1 -- r2 )    float-ext       f_tan_h
1.1       anton    2321: r2 = tanh(r1);
                   2322: :
                   2323:  f2* fexpm1 fdup 2. d>f f+ f/ ;
                   2324: 
1.47      anton    2325: fasinh ( r1 -- r2 )    float-ext       f_a_cinch
1.1       anton    2326: r2 = asinh(r1);
                   2327: :
                   2328:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
                   2329: 
1.47      anton    2330: facosh ( r1 -- r2 )    float-ext       f_a_cosh
1.1       anton    2331: r2 = acosh(r1);
                   2332: :
                   2333:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
                   2334: 
1.47      anton    2335: fatanh ( r1 -- r2 )    float-ext       f_a_tan_h
1.1       anton    2336: r2 = atanh(r1);
                   2337: :
                   2338:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
                   2339:  r> IF  fnegate  THEN ;
                   2340: 
1.47      anton    2341: sfloats        ( n1 -- n2 )    float-ext       s_floats
1.52      anton    2342: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2343: single-precision IEEE floating-point numbers.""
1.1       anton    2344: n2 = n1*sizeof(SFloat);
                   2345: 
1.47      anton    2346: dfloats        ( n1 -- n2 )    float-ext       d_floats
1.52      anton    2347: ""@i{n2} is the number of address units of @i{n1}
1.29      crook    2348: double-precision IEEE floating-point numbers.""
1.1       anton    2349: n2 = n1*sizeof(DFloat);
                   2350: 
1.47      anton    2351: sfaligned      ( c_addr -- sf_addr )   float-ext       s_f_aligned
1.52      anton    2352: ""@i{sf-addr} is the first single-float-aligned address greater
1.29      crook    2353: than or equal to @i{c-addr}.""
1.1       anton    2354: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
                   2355: :
                   2356:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
                   2357: 
1.47      anton    2358: dfaligned      ( c_addr -- df_addr )   float-ext       d_f_aligned
1.52      anton    2359: ""@i{df-addr} is the first double-float-aligned address greater
1.29      crook    2360: than or equal to @i{c-addr}.""
1.1       anton    2361: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
                   2362: :
                   2363:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
                   2364: 
1.112     pazsan   2365: v*     ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
                   2366: ""dot-product: r=v1*v2.  The first element of v1 is at f_addr1, the
                   2367: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
                   2368: ucount elements.""
1.125     anton    2369: r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
1.112     pazsan   2370: :
                   2371:  >r swap 2swap swap 0e r> 0 ?DO
                   2372:      dup f@ over + 2swap dup f@ f* f+ over + 2swap
                   2373:  LOOP 2drop 2drop ; 
                   2374: 
                   2375: faxpy  ( ra f_x nstridex f_y nstridey ucount -- )      gforth
                   2376: ""vy=ra*vx+vy""
1.125     anton    2377: faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
1.112     pazsan   2378: :
                   2379:  >r swap 2swap swap r> 0 ?DO
                   2380:      fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
                   2381:  LOOP 2drop 2drop fdrop ;
                   2382: 
                   2383: \+
                   2384: 
1.1       anton    2385: \ The following words access machine/OS/installation-dependent
                   2386: \   Gforth internals
                   2387: \ !! how about environmental queries DIRECT-THREADED,
                   2388: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
                   2389: 
                   2390: \ local variable implementation primitives
1.112     pazsan   2391: 
1.15      pazsan   2392: \+glocals
1.1       anton    2393: 
1.110     pazsan   2394: \g locals
                   2395: 
1.68      anton    2396: @local#        ( #noffset -- w )       gforth  fetch_local_number
                   2397: w = *(Cell *)(lp+noffset);
1.1       anton    2398: 
1.47      anton    2399: @local0        ( -- w )        new     fetch_local_zero
1.112     pazsan   2400: w = ((Cell *)lp)[0];
1.1       anton    2401: 
1.47      anton    2402: @local1        ( -- w )        new     fetch_local_four
1.112     pazsan   2403: w = ((Cell *)lp)[1];
1.1       anton    2404: 
1.47      anton    2405: @local2        ( -- w )        new     fetch_local_eight
1.112     pazsan   2406: w = ((Cell *)lp)[2];
1.1       anton    2407: 
1.47      anton    2408: @local3        ( -- w )        new     fetch_local_twelve
1.112     pazsan   2409: w = ((Cell *)lp)[3];
1.1       anton    2410: 
1.15      pazsan   2411: \+floating
1.1       anton    2412: 
1.68      anton    2413: f@local#       ( #noffset -- r )       gforth  f_fetch_local_number
                   2414: r = *(Float *)(lp+noffset);
1.1       anton    2415: 
1.47      anton    2416: f@local0       ( -- r )        new     f_fetch_local_zero
1.112     pazsan   2417: r = ((Float *)lp)[0];
1.1       anton    2418: 
1.47      anton    2419: f@local1       ( -- r )        new     f_fetch_local_eight
1.112     pazsan   2420: r = ((Float *)lp)[1];
1.1       anton    2421: 
1.15      pazsan   2422: \+
1.1       anton    2423: 
1.68      anton    2424: laddr# ( #noffset -- c_addr )  gforth  laddr_number
1.1       anton    2425: /* this can also be used to implement lp@ */
1.68      anton    2426: c_addr = (Char *)(lp+noffset);
1.1       anton    2427: 
1.68      anton    2428: lp+!#  ( #noffset -- ) gforth  lp_plus_store_number
1.1       anton    2429: ""used with negative immediate values it allocates memory on the
                   2430: local stack, a positive immediate argument drops memory from the local
                   2431: stack""
1.68      anton    2432: lp += noffset;
1.1       anton    2433: 
1.47      anton    2434: lp-    ( -- )  new     minus_four_lp_plus_store
1.1       anton    2435: lp += -sizeof(Cell);
                   2436: 
1.47      anton    2437: lp+    ( -- )  new     eight_lp_plus_store
1.1       anton    2438: lp += sizeof(Float);
                   2439: 
1.47      anton    2440: lp+2   ( -- )  new     sixteen_lp_plus_store
1.1       anton    2441: lp += 2*sizeof(Float);
                   2442: 
1.47      anton    2443: lp!    ( c_addr -- )   gforth  lp_store
1.1       anton    2444: lp = (Address)c_addr;
                   2445: 
1.47      anton    2446: >l     ( w -- )        gforth  to_l
1.1       anton    2447: lp -= sizeof(Cell);
                   2448: *(Cell *)lp = w;
                   2449: 
1.15      pazsan   2450: \+floating
1.1       anton    2451: 
1.47      anton    2452: f>l    ( r -- )        gforth  f_to_l
1.1       anton    2453: lp -= sizeof(Float);
                   2454: *(Float *)lp = r;
                   2455: 
1.172     anton    2456: fpick  ( f:... u -- f:... r )          gforth
1.52      anton    2457: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
1.172     anton    2458: r = fp[u];
1.11      anton    2459: :
                   2460:  floats fp@ + f@ ;
                   2461: 
1.15      pazsan   2462: \+
                   2463: \+
1.1       anton    2464: 
1.15      pazsan   2465: \+OS
1.1       anton    2466: 
1.110     pazsan   2467: \g syslib
                   2468: 
1.131     pazsan   2469: open-lib       ( c_addr1 u1 -- u2 )    gforth  open_lib
1.237     pazsan   2470: u2 = gforth_dlopen(c_addr1, u1);
1.131     pazsan   2471: 
                   2472: lib-sym        ( c_addr1 u1 u2 -- u3 ) gforth  lib_sym
1.234     anton    2473: #ifdef HAVE_LIBLTDL
1.220     anton    2474: u3 = (UCell) lt_dlsym((lt_dlhandle)u2, cstr(c_addr1, u1, 1));
                   2475: #elif defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
1.131     pazsan   2476: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
                   2477: #else
                   2478: #  ifdef _WIN32
                   2479: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
                   2480: #  else
                   2481: #warning Define lib-sym!
                   2482: u3 = 0;
                   2483: #  endif
                   2484: #endif
                   2485: 
1.172     anton    2486: wcall  ( ... u -- ... )        gforth
1.185     pazsan   2487: gforth_FP=fp;
                   2488: sp=(Cell*)(SYSCALL(Cell*(*)(Cell *, void *))u)(sp, &gforth_FP);
                   2489: fp=gforth_FP;
1.142     pazsan   2490: 
1.186     anton    2491: uw@ ( c_addr -- u )    gforth u_w_fetch
                   2492: ""@i{u} is the zero-extended 16-bit value stored at @i{c_addr}.""
                   2493: u = *(UWyde*)(c_addr);
1.180     pazsan   2494: 
1.186     anton    2495: sw@ ( c_addr -- n )    gforth s_w_fetch
                   2496: ""@i{n} is the sign-extended 16-bit value stored at @i{c_addr}.""
                   2497: n = *(Wyde*)(c_addr);
1.180     pazsan   2498: 
1.186     anton    2499: w! ( w c_addr -- )     gforth w_store
                   2500: ""Store the bottom 16 bits of @i{w} at @i{c_addr}.""
                   2501: *(Wyde*)(c_addr) = w;
1.180     pazsan   2502: 
1.186     anton    2503: ul@ ( c_addr -- u )    gforth u_l_fetch
                   2504: ""@i{u} is the zero-extended 32-bit value stored at @i{c_addr}.""
                   2505: u = *(UTetrabyte*)(c_addr);
1.181     pazsan   2506: 
1.186     anton    2507: sl@ ( c_addr -- n )    gforth s_l_fetch
                   2508: ""@i{n} is the sign-extended 32-bit value stored at @i{c_addr}.""
                   2509: n = *(Tetrabyte*)(c_addr);
1.181     pazsan   2510: 
1.186     anton    2511: l! ( w c_addr -- )     gforth l_store
                   2512: ""Store the bottom 32 bits of @i{w} at @i{c_addr}.""
                   2513: *(Tetrabyte*)(c_addr) = w;
1.180     pazsan   2514: 
1.220     anton    2515: lib-error ( -- c_addr u )       gforth  lib_error
1.228     anton    2516: ""Error message for last failed @code{open-lib} or @code{lib-sym}.""
1.234     anton    2517: #ifdef HAVE_LIBLTDL
1.232     anton    2518: c_addr = (Char *)lt_dlerror();
                   2519: u = (c_addr == NULL) ? 0 : strlen((char *)c_addr);
1.244     pazsan   2520: #elif defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2521: c_addr = dlerror();
                   2522: u = strlen(c_addr);
1.234     anton    2523: #else
                   2524: c_addr = "libltdl is not configured";
                   2525: u = strlen(c_addr);
                   2526: #endif
1.220     anton    2527: 
1.252     pazsan   2528: be-w! ( w c_addr -- )  gforth w_store_be
                   2529: ""Store the bottom 16 bits of @i{w} at @i{c_addr} in big endian format.""
                   2530: c_addr[0] = w >> 8;
                   2531: c_addr[1] = w;
                   2532: 
                   2533: be-l! ( w c_addr -- )  gforth l_store_be
                   2534: ""Store the bottom 32 bits of @i{w} at @i{c_addr} in big endian format.""
                   2535: c_addr[0] = w >> 24;
                   2536: c_addr[1] = w >> 16;
                   2537: c_addr[2] = w >> 8;
                   2538: c_addr[3] = w;
                   2539: 
                   2540: le-w! ( w c_addr -- )  gforth w_store_le
                   2541: ""Store the bottom 16 bits of @i{w} at @i{c_addr} in big endian format.""
                   2542: c_addr[1] = w >> 8;
                   2543: c_addr[0] = w;
                   2544: 
                   2545: le-l! ( w c_addr -- )  gforth l_store_le
                   2546: ""Store the bottom 32 bits of @i{w} at @i{c_addr} in big endian format.""
                   2547: c_addr[3] = w >> 24;
                   2548: c_addr[2] = w >> 16;
                   2549: c_addr[1] = w >> 8;
                   2550: c_addr[0] = w;
                   2551: 
1.254     anton    2552: be-uw@ ( c_addr -- u ) gforth w_fetch_be
                   2553: ""@i{u} is the zero-extended 16-bit big endian value stored at @i{c_addr}.""
                   2554: u = (c_addr[0] << 8) | (c_addr[1]);
                   2555: 
                   2556: be-ul@ ( c_addr -- u ) gforth l_fetch_be
                   2557: ""@i{u} is the zero-extended 32-bit big endian value stored at @i{c_addr}.""
                   2558: u = (c_addr[0] << 24) | (c_addr[1] << 16) | (c_addr[2] << 8) | (c_addr[3]);
                   2559: 
                   2560: le-uw@ ( c_addr -- u ) gforth w_fetch_le
                   2561: ""@i{u} is the zero-extended 16-bit little endian value stored at @i{c_addr}.""
                   2562: u = (c_addr[1] << 8) | (c_addr[0]);
                   2563: 
                   2564: le-ul@ ( c_addr -- u ) gforth l_fetch_le
                   2565: ""@i{u} is the zero-extended 32-bit little endian value stored at @i{c_addr}.""
                   2566: u = (c_addr[3] << 24) | (c_addr[2] << 16) | (c_addr[1] << 8) | (c_addr[0]);
                   2567: 
                   2568: \+64bit
                   2569: 
                   2570: x! ( w c_addr -- )     gforth x_store
                   2571: ""Store the bottom 64 bits of @i{w} at 64-bit-aligned @i{c_addr}.""
                   2572: *(UOctabyte *)c_addr = w;
                   2573: 
                   2574: ux@ ( c_addr -- u )    gforth u_x_fetch
                   2575: ""@i{u} is the zero-extended 64-bit value stored at 64-bit-aligned @i{c_addr}.""
                   2576: u = *(UOctabyte *)c_addr;
                   2577: 
                   2578: sx@ ( c_addr -- n )    gforth s_x_fetch
                   2579: ""@i{u} is the sign-extended 64-bit value stored at 64-bit-aligned @i{c_addr}.""
                   2580: n = *(Octabyte *)c_addr;
                   2581: 
                   2582: be-x! ( w c_addr -- )  gforth b_e_x_store
                   2583: ""Store the bottom 64 bits of @i{w} at @i{c_addr} in big endian format.""
                   2584: c_addr[0] = w >> 56;
                   2585: c_addr[1] = w >> 48;
                   2586: c_addr[2] = w >> 40;
                   2587: c_addr[3] = w >> 32;
                   2588: c_addr[4] = w >> 24;
                   2589: c_addr[5] = w >> 16;
                   2590: c_addr[6] = w >> 8;
                   2591: c_addr[7] = w;
                   2592: 
                   2593: le-x! ( w c_addr -- )  gforth l_e_x_store
1.252     pazsan   2594: ""Store the bottom 64 bits of @i{w} at @i{c_addr} in big endian format.""
                   2595: c_addr[7] = w >> 56;
                   2596: c_addr[6] = w >> 48;
                   2597: c_addr[5] = w >> 40;
                   2598: c_addr[4] = w >> 32;
                   2599: c_addr[3] = w >> 24;
                   2600: c_addr[2] = w >> 16;
                   2601: c_addr[1] = w >> 8;
                   2602: c_addr[0] = w;
                   2603: 
1.254     anton    2604: be-ux@ ( c_addr -- u ) gforth b_e_u_x_fetch
1.252     pazsan   2605: ""@i{u} is the zero-extended 64-bit big endian value stored at @i{c_addr}.""
                   2606: u = (((Cell)(c_addr[0]) << 56) |
                   2607:      ((Cell)(c_addr[1]) << 48) |
                   2608:      ((Cell)(c_addr[2]) << 40) |
                   2609:      ((Cell)(c_addr[3]) << 32) |
                   2610:      ((Cell)(c_addr[4]) << 24) |
                   2611:      ((Cell)(c_addr[5]) << 16) |
                   2612:      ((Cell)(c_addr[6]) << 8) |
                   2613:      ((Cell)(c_addr[7])));
                   2614: 
1.254     anton    2615: le-ux@ ( c_addr -- u ) gforth l_e_u_x_fetch
1.252     pazsan   2616: ""@i{u} is the zero-extended 64-bit little endian value stored at @i{c_addr}.""
                   2617: u = (((Cell)(c_addr[7]) << 56) |
                   2618:      ((Cell)(c_addr[6]) << 48) |
                   2619:      ((Cell)(c_addr[5]) << 40) |
                   2620:      ((Cell)(c_addr[4]) << 32) |
                   2621:      ((Cell)(c_addr[3]) << 24) |
                   2622:      ((Cell)(c_addr[2]) << 16) |
                   2623:      ((Cell)(c_addr[1]) << 8) |
                   2624:      ((Cell)(c_addr[0])));
1.250     pazsan   2625: 
1.224     pazsan   2626: \+
1.254     anton    2627: \+
1.142     pazsan   2628: \g peephole
1.46      pazsan   2629: 
1.112     pazsan   2630: \+peephole
                   2631: 
1.119     anton    2632: compile-prim1 ( a_prim -- ) gforth compile_prim1
                   2633: ""compile prim (incl. immargs) at @var{a_prim}""
                   2634: compile_prim1(a_prim);
                   2635: 
1.172     anton    2636: finish-code ( ... -- ... ) gforth finish_code
1.119     anton    2637: ""Perform delayed steps in code generation (branch resolution, I-cache
                   2638: flushing).""
1.172     anton    2639: /* The ... above are a workaround for a bug in gcc-2.95, which fails
                   2640:    to save spTOS (gforth-fast --enable-force-reg) */
1.119     anton    2641: finish_code();
                   2642: 
                   2643: forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
                   2644: f = forget_dyncode(c_code);
                   2645: 
                   2646: decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
                   2647: ""a_prim is the code address of the primitive that has been
                   2648: compile_prim1ed to a_code""
1.121     anton    2649: a_prim = (Cell *)decompile_code((Label)a_code);
1.119     anton    2650: 
1.112     pazsan   2651: \ set-next-code and call2 do not appear in images and can be
                   2652: \ renumbered arbitrarily
1.46      pazsan   2653: 
1.112     pazsan   2654: set-next-code ( #w -- ) gforth set_next_code
                   2655: #ifdef NO_IP
                   2656: next_code = (Label)w;
                   2657: #endif
1.34      jwilke   2658: 
1.112     pazsan   2659: call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
                   2660: /* call with explicit return address */
                   2661: #ifdef NO_IP
                   2662: INST_TAIL;
                   2663: JUMP(a_callee);
1.45      anton    2664: #else
1.112     pazsan   2665: assert(0);
1.45      anton    2666: #endif
1.131     pazsan   2667: 
                   2668: tag-offsets ( -- a_addr ) gforth tag_offsets
                   2669: extern Cell groups[32];
                   2670: a_addr = groups;
1.51      anton    2671: 
1.54      pazsan   2672: \+
1.128     anton    2673: 
1.248     anton    2674: \g primitive_centric
                   2675: 
                   2676: \ primitives for primitive-centric code
                   2677: \ another one is does-exec
                   2678: 
                   2679: abi-call       ( #a_callee ... -- ... ) gforth-internal abi_call
                   2680: /* primitive for compiled ABI-CODE words */
                   2681: abifunc *f = (abifunc *)a_callee;
                   2682: Float *fp_mem = fp;
                   2683: sp = (*f)(sp, &fp_mem);
                   2684: fp = fp_mem;
                   2685: 
                   2686: ;abi-code-exec ( #a_cfa ... -- ... ) gforth-internal semi_abi_code_exec
                   2687: /* primitive for performing ;ABI-CODE words */
                   2688: Float *fp_mem = fp;
                   2689: semiabifunc *f = (semiabifunc *)DOES_CODE1(a_cfa);
                   2690: Address body = (Address)PFA(a_cfa);
                   2691: sp = (*f)(sp, &fp_mem, body);
                   2692: fp = fp_mem;
                   2693: 
1.249     anton    2694: lit-execute    ( #a_addr -- )  new     lit_execute
                   2695: /* for ;code and code words; a static superinstruction would be more general, 
                   2696:    but VM_JUMP is currently not supported there */
                   2697: #ifndef NO_IP
                   2698: ip=IP;
                   2699: #endif
1.248     anton    2700: SUPER_END;
1.249     anton    2701: VM_JUMP(EXEC1((Xt)a_addr));
1.248     anton    2702: 
                   2703: 
1.128     anton    2704: \g static_super
                   2705: 
1.173     anton    2706: ifdef(`STACK_CACHE_FILE',
1.147     anton    2707: `include(peeprules.vmg)')
1.54      pazsan   2708: 
1.112     pazsan   2709: \g end

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