Annotation of gforth/prim, revision 1.126

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

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