File:  [gforth] / gforth / prim
Revision 1.93: download - view: text, annotated - select for diffs
Sun Jun 2 10:31:28 2002 UTC (17 years, 3 months ago) by anton
Branches: MAIN
CVS tags: HEAD
EKEY now returns single characters instead of waiting for the rest of
   an escape sequence
documentation changes

    1: \ Gforth primitives
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
    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
   19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   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: \ 
   29: \ forth name	( stack effect )	category	[pronunciation]
   30: \ [""glossary entry""]
   31: \ C code
   32: \ [:
   33: \ Forth code]
   34: \ 
   35: \ Note: Fields in brackets are optional.  Word specifications have to
   36: \ be separated by at least one empty line
   37: \
   38: \ Both pronounciation and stack items (in the stack effect) must
   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.
   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).
   56: \
   57: \ For superinstructions the syntax is:
   58: \
   59: \ forth-name [/ c-name] = forth-name forth-name ...
   60: \
   61: \ 
   62: \ The stack variables have the following types:
   63: \ 
   64: \ name matches	type
   65: \ f.*		Bool
   66: \ c.*		Char
   67: \ [nw].*	Cell
   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 *
   79: 
   80: \E stack data-stack   sp Cell
   81: \E stack fp-stack     fp Float
   82: \E stack return-stack rp Cell
   83: \E
   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
  101: \E s" struct Longname *" single data-stack type-prefix longname
  102: \E 
  103: \E return-stack stack-prefix R:
  104: \E inst-stream  stack-prefix #
  105: \E 
  106: \E set-current
  107: 
  108: \ 
  109: \ 
  110: \ 
  111: \ In addition the following names can be used:
  112: \ ip	the instruction pointer
  113: \ sp	the data stack pointer
  114: \ rp	the parameter stack pointer
  115: \ lp	the locals stack pointer
  116: \ NEXT	executes NEXT
  117: \ cfa	
  118: \ NEXT1	executes NEXT1
  119: \ FLAG(x)	makes a Forth flag from a C flag
  120: \ 
  121: \ 
  122: \ 
  123: \ Percentages in comments are from Koopmans book: average/maximum use
  124: \ (taken from four, not very representative benchmarks)
  125: \ 
  126: \ 
  127: \ 
  128: \ To do:
  129: \ 
  130: \ throw execute, cfa and NEXT1 out?
  131: \ macroize *ip, ip++, *ip++ (pipelining)?
  132: 
  133: \ these m4 macros would collide with identifiers
  134: undefine(`index')
  135: undefine(`shift')
  136: undefine(`symbols')
  137: 
  138: \g control
  139: 
  140: noop	( -- )		gforth
  141: :
  142:  ;
  143: 
  144: lit	( #w -- w )		gforth
  145: :
  146:  r> dup @ swap cell+ >r ;
  147: 
  148: execute	( xt -- )		core
  149: ""Perform the semantics represented by the execution token, @i{xt}.""
  150: ip=IP;
  151: IF_spTOS(spTOS = sp[0]);
  152: SUPER_END;
  153: EXEC(xt);
  154: 
  155: perform	( a_addr -- )	gforth
  156: ""@code{@@ execute}.""
  157: /* and pfe */
  158: ip=IP;
  159: IF_spTOS(spTOS = sp[0]);
  160: SUPER_END;
  161: EXEC(*(Xt *)a_addr);
  162: :
  163:  @ execute ;
  164: 
  165: \fhas? skipbranchprims 0= [IF]
  166: \+glocals
  167: 
  168: branch-lp+!#	( #ndisp #nlocals -- )	gforth	branch_lp_plus_store_number
  169: /* this will probably not be used */
  170: lp += nlocals;
  171: SET_IP((Xt *)(((Cell)(IP-2))+ndisp));
  172: 
  173: \+
  174: 
  175: branch	( #ndisp -- )		gforth
  176: SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  177: :
  178:  r> dup @ + >r ;
  179: 
  180: \ condbranch(forthname,stackeffect,restline,code,forthcode)
  181: \ this is non-syntactical: code must open a brace that is closed by the macro
  182: define(condbranch,
  183: $1 ( `#'ndisp $2 ) $3
  184: $4	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  185: TAIL;
  186: }
  187: SUPER_CONTINUE;
  188: $5
  189: 
  190: \+glocals
  191: 
  192: $1-lp+!`#' ( `#'ndisp `#'nlocals $2 ) $3_lp_plus_store_number
  193: $4    lp += nlocals;
  194: SET_IP((Xt *)(((Cell)(IP-2))+ndisp));
  195: TAIL;
  196: }
  197: SUPER_CONTINUE;
  198: 
  199: \+
  200: )
  201: 
  202: condbranch(?branch,f --,f83	question_branch,
  203: if (f==0) {
  204: ,:
  205:  0= dup     \ !f !f
  206:  r> dup @   \ !f !f IP branchoffset
  207:  rot and +  \ !f IP|IP+branchoffset
  208:  swap 0= cell and + \ IP''
  209:  >r ;)
  210: 
  211: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
  212: \ is only used in if's (yet)
  213: 
  214: \+xconds
  215: 
  216: ?dup-?branch	( #ndisp f -- f )	new	question_dupe_question_branch
  217: ""The run-time procedure compiled by @code{?DUP-IF}.""
  218: if (f==0) {
  219:   sp++;
  220:   IF_spTOS(spTOS = sp[0]);
  221:   SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  222:   TAIL;
  223: }
  224: SUPER_CONTINUE;
  225: 
  226: ?dup-0=-?branch	( #ndisp f -- )	new	question_dupe_zero_equals_question_branch
  227: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
  228: /* the approach taken here of declaring the word as having the stack
  229: effect ( f -- ) and correcting for it in the branch-taken case costs a
  230: few cycles in that case, but is easy to convert to a CONDBRANCH
  231: invocation */
  232: if (f!=0) {
  233:   sp--;
  234:   SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  235:   NEXT;
  236: }
  237: SUPER_CONTINUE;
  238: 
  239: \+
  240: \f[THEN]
  241: \fhas? skiploopprims 0= [IF]
  242: 
  243: condbranch((next),R:n1 -- R:n2,cmFORTH	paren_next,
  244: n2=n1-1;
  245: if (n1) {
  246: ,:
  247:  r> r> dup 1- >r
  248:  IF dup @ + >r ELSE cell+ >r THEN ;)
  249: 
  250: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth	paren_loop,
  251: n2=n1+1;
  252: if (n2 != nlimit) {
  253: ,:
  254:  r> r> 1+ r> 2dup =
  255:  IF >r 1- >r cell+ >r
  256:  ELSE >r >r dup @ + >r THEN ;)
  257: 
  258: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
  259: /* !! check this thoroughly */
  260: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
  261: /* dependent upon two's complement arithmetic */
  262: Cell olddiff = n1-nlimit;
  263: n2=n1+n;	
  264: if ((olddiff^(olddiff+n))>=0   /* the limit is not crossed */
  265:     || (olddiff^n)>=0          /* it is a wrap-around effect */) {
  266: ,:
  267:  r> swap
  268:  r> r> 2dup - >r
  269:  2 pick r@ + r@ xor 0< 0=
  270:  3 pick r> xor 0< 0= or
  271:  IF    >r + >r dup @ + >r
  272:  ELSE  >r >r drop cell+ >r THEN ;)
  273: 
  274: \+xconds
  275: 
  276: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
  277: UCell olddiff = n1-nlimit;
  278: n2=n1-u;
  279: if (olddiff>u) {
  280: ,)
  281: 
  282: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth	paren_symmetric_plus_loop,
  283: ""The run-time procedure compiled by S+LOOP. It loops until the index
  284: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
  285: version of (+LOOP).""
  286: /* !! check this thoroughly */
  287: Cell diff = n1-nlimit;
  288: Cell newdiff = diff+n;
  289: if (n<0) {
  290:     diff = -diff;
  291:     newdiff = -newdiff;
  292: }
  293: n2=n1+n;
  294: if (diff>=0 || newdiff<0) {
  295: ,)
  296: 
  297: \+
  298: 
  299: unloop	( R:w1 R:w2 -- )	core
  300: /* !! alias for 2rdrop */
  301: :
  302:  r> rdrop rdrop >r ;
  303: 
  304: (for)	( ncount -- R:nlimit R:ncount )		cmFORTH		paren_for
  305: /* or (for) = >r -- collides with unloop! */
  306: nlimit=0;
  307: :
  308:  r> swap 0 >r >r >r ;
  309: 
  310: (do)	( nlimit nstart -- R:nlimit R:nstart )	gforth		paren_do
  311: :
  312:  r> swap rot >r >r >r ;
  313: 
  314: (?do)	( #ndisp nlimit nstart -- R:nlimit R:nstart )	gforth	paren_question_do
  315: if (nstart == nlimit) {
  316:     SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  317:     TAIL;
  318: }
  319: SUPER_CONTINUE;
  320: :
  321:   2dup =
  322:   IF   r> swap rot >r >r
  323:        dup @ + >r
  324:   ELSE r> swap rot >r >r
  325:        cell+ >r
  326:   THEN ;				\ --> CORE-EXT
  327: 
  328: \+xconds
  329: 
  330: (+do)	( #ndisp nlimit nstart -- R:nlimit R:nstart )	gforth	paren_plus_do
  331: if (nstart >= nlimit) {
  332:     SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  333:     TAIL;
  334: }
  335: SUPER_CONTINUE;
  336: :
  337:  swap 2dup
  338:  r> swap >r swap >r
  339:  >=
  340:  IF
  341:      dup @ +
  342:  ELSE
  343:      cell+
  344:  THEN  >r ;
  345: 
  346: (u+do)	( #ndisp ulimit ustart -- R:ulimit R:ustart )	gforth	paren_u_plus_do
  347: if (ustart >= ulimit) {
  348:     SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  349:     TAIL;
  350: }
  351: SUPER_CONTINUE;
  352: :
  353:  swap 2dup
  354:  r> swap >r swap >r
  355:  u>=
  356:  IF
  357:      dup @ +
  358:  ELSE
  359:      cell+
  360:  THEN  >r ;
  361: 
  362: (-do)	( #ndisp nlimit nstart -- R:nlimit R:nstart )	gforth	paren_minus_do
  363: if (nstart <= nlimit) {
  364:     SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  365:     TAIL;
  366: }
  367: SUPER_CONTINUE;
  368: :
  369:  swap 2dup
  370:  r> swap >r swap >r
  371:  <=
  372:  IF
  373:      dup @ +
  374:  ELSE
  375:      cell+
  376:  THEN  >r ;
  377: 
  378: (u-do)	( #ndisp ulimit ustart -- R:ulimit R:ustart )	gforth	paren_u_minus_do
  379: if (ustart <= ulimit) {
  380:     SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
  381:     TAIL;
  382: }
  383: SUPER_CONTINUE;
  384: :
  385:  swap 2dup
  386:  r> swap >r swap >r
  387:  u<=
  388:  IF
  389:      dup @ +
  390:  ELSE
  391:      cell+
  392:  THEN  >r ;
  393: 
  394: \+
  395: 
  396: \ don't make any assumptions where the return stack is!!
  397: \ implement this in machine code if it should run quickly!
  398: 
  399: i	( R:n -- R:n n )		core
  400: :
  401: \ rp@ cell+ @ ;
  402:   r> r> tuck >r >r ;
  403: 
  404: i'	( R:w R:w2 -- R:w R:w2 w )		gforth		i_tick
  405: :
  406: \ rp@ cell+ cell+ @ ;
  407:   r> r> r> dup itmp ! >r >r >r itmp @ ;
  408: variable itmp
  409: 
  410: j	( R:n R:d1 -- n R:n R:d1 )		core
  411: :
  412: \ rp@ cell+ cell+ cell+ @ ;
  413:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
  414: [IFUNDEF] itmp variable itmp [THEN]
  415: 
  416: k	( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 )		gforth
  417: :
  418: \ rp@ [ 5 cells ] Literal + @ ;
  419:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
  420: [IFUNDEF] itmp variable itmp [THEN]
  421: 
  422: \f[THEN]
  423: 
  424: \ digit is high-level: 0/0%
  425: 
  426: \g strings
  427: 
  428: move	( c_from c_to ucount -- )		core
  429: ""Copy the contents of @i{ucount} aus at @i{c-from} to
  430: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
  431: /* !! note that the standard specifies addr, not c-addr */
  432: memmove(c_to,c_from,ucount);
  433: /* make an Ifdef for bsd and others? */
  434: :
  435:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
  436: 
  437: cmove	( c_from c_to u -- )	string	c_move
  438: ""Copy the contents of @i{ucount} characters from data space at
  439: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
  440: from low address to high address; i.e., for overlapping areas it is
  441: safe if @i{c-to}=<@i{c-from}.""
  442: while (u-- > 0)
  443:   *c_to++ = *c_from++;
  444: :
  445:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
  446: 
  447: cmove>	( c_from c_to u -- )	string	c_move_up
  448: ""Copy the contents of @i{ucount} characters from data space at
  449: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
  450: from high address to low address; i.e., for overlapping areas it is
  451: safe if @i{c-to}>=@i{c-from}.""
  452: while (u-- > 0)
  453:   c_to[u] = c_from[u];
  454: :
  455:  dup 0= IF  drop 2drop exit  THEN
  456:  rot over + -rot bounds swap 1-
  457:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
  458: 
  459: fill	( c_addr u c -- )	core
  460: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
  461: memset(c_addr,c,u);
  462: :
  463:  -rot bounds
  464:  ?DO  dup I c!  LOOP  drop ;
  465: 
  466: compare	( c_addr1 u1 c_addr2 u2 -- n )	string
  467: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
  468: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
  469: is 1. Currently this is based on the machine's character
  470: comparison. In the future, this may change to consider the current
  471: locale and its collation order.""
  472: /* close ' to keep fontify happy */ 
  473: n = memcmp(c_addr1, c_addr2, u1<u2 ? u1 : u2);
  474: if (n==0)
  475:   n = u1-u2;
  476: if (n<0)
  477:   n = -1;
  478: else if (n>0)
  479:   n = 1;
  480: :
  481:  rot 2dup swap - >r min swap -text dup
  482:  IF  rdrop  ELSE  drop r> sgn  THEN ;
  483: : sgn ( n -- -1/0/1 )
  484:  dup 0= IF EXIT THEN  0< 2* 1+ ;
  485: 
  486: -text	( c_addr1 u c_addr2 -- n )	new	dash_text
  487: n = memcmp(c_addr1, c_addr2, u);
  488: if (n<0)
  489:   n = -1;
  490: else if (n>0)
  491:   n = 1;
  492: :
  493:  swap bounds
  494:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
  495:  ELSE  c@ I c@ - unloop  THEN  sgn ;
  496: : sgn ( n -- -1/0/1 )
  497:  dup 0= IF EXIT THEN  0< 2* 1+ ;
  498: 
  499: toupper	( c1 -- c2 )	gforth
  500: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
  501: is the equivalent upper-case character. All other characters are unchanged.""
  502: c2 = toupper(c1);
  503: :
  504:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
  505: 
  506: capscomp	( c_addr1 u c_addr2 -- n )	new
  507: n = memcasecmp(c_addr1, c_addr2, u); /* !! use something that works in all locales */
  508: if (n<0)
  509:   n = -1;
  510: else if (n>0)
  511:   n = 1;
  512: :
  513:  swap bounds
  514:  ?DO  dup c@ I c@ <>
  515:      IF  dup c@ toupper I c@ toupper =
  516:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
  517:  ELSE  c@ toupper I c@ toupper - unloop  THEN  sgn ;
  518: 
  519: -trailing	( c_addr u1 -- c_addr u2 )		string	dash_trailing
  520: ""Adjust the string specified by @i{c-addr, u1} to remove all trailing
  521: spaces. @i{u2} is the length of the modified string.""
  522: u2 = u1;
  523: while (u2>0 && c_addr[u2-1] == ' ')
  524:   u2--;
  525: :
  526:  BEGIN  1- 2dup + c@ bl =  WHILE
  527:         dup  0= UNTIL  ELSE  1+  THEN ;
  528: 
  529: /string	( c_addr1 u1 n -- c_addr2 u2 )	string	slash_string
  530: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
  531: characters from the start of the string.""
  532: c_addr2 = c_addr1+n;
  533: u2 = u1-n;
  534: :
  535:  tuck - >r + r> dup 0< IF  - 0  THEN ;
  536: 
  537: \g arith
  538: 
  539: +	( n1 n2 -- n )		core	plus
  540: n = n1+n2;
  541: 
  542: \ PFE-0.9.14 has it differently, but the next release will have it as follows
  543: under+	( n1 n2 n3 -- n n2 )	gforth	under_plus
  544: ""add @i{n3} to @i{n1} (giving @i{n})""
  545: n = n1+n3;
  546: :
  547:  rot + swap ;
  548: 
  549: -	( n1 n2 -- n )		core	minus
  550: n = n1-n2;
  551: :
  552:  negate + ;
  553: 
  554: negate	( n1 -- n2 )		core
  555: /* use minus as alias */
  556: n2 = -n1;
  557: :
  558:  invert 1+ ;
  559: 
  560: 1+	( n1 -- n2 )		core		one_plus
  561: n2 = n1+1;
  562: :
  563:  1 + ;
  564: 
  565: 1-	( n1 -- n2 )		core		one_minus
  566: n2 = n1-1;
  567: :
  568:  1 - ;
  569: 
  570: max	( n1 n2 -- n )	core
  571: if (n1<n2)
  572:   n = n2;
  573: else
  574:   n = n1;
  575: :
  576:  2dup < IF swap THEN drop ;
  577: 
  578: min	( n1 n2 -- n )	core
  579: if (n1<n2)
  580:   n = n1;
  581: else
  582:   n = n2;
  583: :
  584:  2dup > IF swap THEN drop ;
  585: 
  586: abs	( n -- u )	core
  587: if (n<0)
  588:   u = -n;
  589: else
  590:   u = n;
  591: :
  592:  dup 0< IF negate THEN ;
  593: 
  594: *	( n1 n2 -- n )		core	star
  595: n = n1*n2;
  596: :
  597:  um* drop ;
  598: 
  599: /	( n1 n2 -- n )		core	slash
  600: n = n1/n2;
  601: :
  602:  /mod nip ;
  603: 
  604: mod	( n1 n2 -- n )		core
  605: n = n1%n2;
  606: :
  607:  /mod drop ;
  608: 
  609: /mod	( n1 n2 -- n3 n4 )		core		slash_mod
  610: n4 = n1/n2;
  611: n3 = n1%n2; /* !! is this correct? look into C standard! */
  612: :
  613:  >r s>d r> fm/mod ;
  614: 
  615: 2*	( n1 -- n2 )		core		two_star
  616: ""Shift left by 1; also works on unsigned numbers""
  617: n2 = 2*n1;
  618: :
  619:  dup + ;
  620: 
  621: 2/	( n1 -- n2 )		core		two_slash
  622: ""Arithmetic shift right by 1.  For signed numbers this is a floored
  623: division by 2 (note that @code{/} not necessarily floors).""
  624: n2 = n1>>1;
  625: :
  626:  dup MINI and IF 1 ELSE 0 THEN
  627:  [ bits/byte cell * 1- ] literal 
  628:  0 DO 2* swap dup 2* >r MINI and 
  629:      IF 1 ELSE 0 THEN or r> swap
  630:  LOOP nip ;
  631: 
  632: fm/mod	( d1 n1 -- n2 n3 )		core		f_m_slash_mod
  633: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
  634: #ifdef BUGGY_LONG_LONG
  635: DCell r = fmdiv(d1,n1);
  636: n2=r.hi;
  637: n3=r.lo;
  638: #else
  639: /* assumes that the processor uses either floored or symmetric division */
  640: n3 = d1/n1;
  641: n2 = d1%n1;
  642: /* note that this 1%-3>0 is optimized by the compiler */
  643: if (1%-3>0 && (d1<0) != (n1<0) && n2!=0) {
  644:   n3--;
  645:   n2+=n1;
  646: }
  647: #endif
  648: :
  649:  dup >r dup 0< IF  negate >r dnegate r>  THEN
  650:  over       0< IF  tuck + swap  THEN
  651:  um/mod
  652:  r> 0< IF  swap negate swap  THEN ;
  653: 
  654: sm/rem	( d1 n1 -- n2 n3 )		core		s_m_slash_rem
  655: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
  656: #ifdef BUGGY_LONG_LONG
  657: DCell r = smdiv(d1,n1);
  658: n2=r.hi;
  659: n3=r.lo;
  660: #else
  661: /* assumes that the processor uses either floored or symmetric division */
  662: n3 = d1/n1;
  663: n2 = d1%n1;
  664: /* note that this 1%-3<0 is optimized by the compiler */
  665: if (1%-3<0 && (d1<0) != (n1<0) && n2!=0) {
  666:   n3++;
  667:   n2-=n1;
  668: }
  669: #endif
  670: :
  671:  over >r dup >r abs -rot
  672:  dabs rot um/mod
  673:  r> r@ xor 0< IF       negate       THEN
  674:  r>        0< IF  swap negate swap  THEN ;
  675: 
  676: m*	( n1 n2 -- d )		core	m_star
  677: #ifdef BUGGY_LONG_LONG
  678: d = mmul(n1,n2);
  679: #else
  680: d = (DCell)n1 * (DCell)n2;
  681: #endif
  682: :
  683:  2dup      0< and >r
  684:  2dup swap 0< and >r
  685:  um* r> - r> - ;
  686: 
  687: um*	( u1 u2 -- ud )		core	u_m_star
  688: /* use u* as alias */
  689: #ifdef BUGGY_LONG_LONG
  690: ud = ummul(u1,u2);
  691: #else
  692: ud = (UDCell)u1 * (UDCell)u2;
  693: #endif
  694: :
  695:    >r >r 0 0 r> r> [ 8 cells ] literal 0
  696:    DO
  697:        over >r dup >r 0< and d2*+ drop
  698:        r> 2* r> swap
  699:    LOOP 2drop ;
  700: : d2*+ ( ud n -- ud+n c )
  701:    over MINI
  702:    and >r >r 2dup d+ swap r> + swap r> ;
  703: 
  704: um/mod	( ud u1 -- u2 u3 )		core	u_m_slash_mod
  705: ""ud=u3*u1+u2, u1>u2>=0""
  706: #ifdef BUGGY_LONG_LONG
  707: UDCell r = umdiv(ud,u1);
  708: u2=r.hi;
  709: u3=r.lo;
  710: #else
  711: u3 = ud/u1;
  712: u2 = ud%u1;
  713: #endif
  714: :
  715:    0 swap [ 8 cells 1 + ] literal 0
  716:    ?DO /modstep
  717:    LOOP drop swap 1 rshift or swap ;
  718: : /modstep ( ud c R: u -- ud-?u c R: u )
  719:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
  720: : d2*+ ( ud n -- ud+n c )
  721:    over MINI
  722:    and >r >r 2dup d+ swap r> + swap r> ;
  723: 
  724: m+	( d1 n -- d2 )		double		m_plus
  725: #ifdef BUGGY_LONG_LONG
  726: d2.lo = d1.lo+n;
  727: d2.hi = d1.hi - (n<0) + (d2.lo<d1.lo);
  728: #else
  729: d2 = d1+n;
  730: #endif
  731: :
  732:  s>d d+ ;
  733: 
  734: d+	( d1 d2 -- d )		double	d_plus
  735: #ifdef BUGGY_LONG_LONG
  736: d.lo = d1.lo+d2.lo;
  737: d.hi = d1.hi + d2.hi + (d.lo<d1.lo);
  738: #else
  739: d = d1+d2;
  740: #endif
  741: :
  742:  rot + >r tuck + swap over u> r> swap - ;
  743: 
  744: d-	( d1 d2 -- d )		double		d_minus
  745: #ifdef BUGGY_LONG_LONG
  746: d.lo = d1.lo - d2.lo;
  747: d.hi = d1.hi-d2.hi-(d1.lo<d2.lo);
  748: #else
  749: d = d1-d2;
  750: #endif
  751: :
  752:  dnegate d+ ;
  753: 
  754: dnegate	( d1 -- d2 )		double	d_negate
  755: /* use dminus as alias */
  756: #ifdef BUGGY_LONG_LONG
  757: d2 = dnegate(d1);
  758: #else
  759: d2 = -d1;
  760: #endif
  761: :
  762:  invert swap negate tuck 0= - ;
  763: 
  764: d2*	( d1 -- d2 )		double		d_two_star
  765: ""Shift left by 1; also works on unsigned numbers""
  766: #ifdef BUGGY_LONG_LONG
  767: d2.lo = d1.lo<<1;
  768: d2.hi = (d1.hi<<1) | (d1.lo>>(CELL_BITS-1));
  769: #else
  770: d2 = 2*d1;
  771: #endif
  772: :
  773:  2dup d+ ;
  774: 
  775: d2/	( d1 -- d2 )		double		d_two_slash
  776: ""Arithmetic shift right by 1.  For signed numbers this is a floored
  777: division by 2.""
  778: #ifdef BUGGY_LONG_LONG
  779: d2.hi = d1.hi>>1;
  780: d2.lo= (d1.lo>>1) | (d1.hi<<(CELL_BITS-1));
  781: #else
  782: d2 = d1>>1;
  783: #endif
  784: :
  785:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
  786:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
  787: 
  788: and	( w1 w2 -- w )		core
  789: w = w1&w2;
  790: 
  791: or	( w1 w2 -- w )		core
  792: w = w1|w2;
  793: :
  794:  invert swap invert and invert ;
  795: 
  796: xor	( w1 w2 -- w )		core	x_or
  797: w = w1^w2;
  798: 
  799: invert	( w1 -- w2 )		core
  800: w2 = ~w1;
  801: :
  802:  MAXU xor ;
  803: 
  804: rshift	( u1 n -- u2 )		core	r_shift
  805: ""Logical shift right by @i{n} bits.""
  806:   u2 = u1>>n;
  807: :
  808:     0 ?DO 2/ MAXI and LOOP ;
  809: 
  810: lshift	( u1 n -- u2 )		core	l_shift
  811:   u2 = u1<<n;
  812: :
  813:     0 ?DO 2* LOOP ;
  814: 
  815: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
  816: define(comparisons,
  817: $1=	( $2 -- f )		$6	$3equals
  818: f = FLAG($4==$5);
  819: :
  820:     [ char $1x char 0 = [IF]
  821: 	] IF false ELSE true THEN [
  822:     [ELSE]
  823: 	] xor 0= [
  824:     [THEN] ] ;
  825: 
  826: $1<>	( $2 -- f )		$7	$3not_equals
  827: f = FLAG($4!=$5);
  828: :
  829:     [ char $1x char 0 = [IF]
  830: 	] IF true ELSE false THEN [
  831:     [ELSE]
  832: 	] xor 0<> [
  833:     [THEN] ] ;
  834: 
  835: $1<	( $2 -- f )		$8	$3less_than
  836: f = FLAG($4<$5);
  837: :
  838:     [ char $1x char 0 = [IF]
  839: 	] MINI and 0<> [
  840:     [ELSE] char $1x char u = [IF]
  841: 	]   2dup xor 0<  IF nip ELSE - THEN 0<  [
  842: 	[ELSE]
  843: 	    ] MINI xor >r MINI xor r> u< [
  844: 	[THEN]
  845:     [THEN] ] ;
  846: 
  847: $1>	( $2 -- f )		$9	$3greater_than
  848: f = FLAG($4>$5);
  849: :
  850:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
  851:     $1< ;
  852: 
  853: $1<=	( $2 -- f )		gforth	$3less_or_equal
  854: f = FLAG($4<=$5);
  855: :
  856:     $1> 0= ;
  857: 
  858: $1>=	( $2 -- f )		gforth	$3greater_or_equal
  859: f = FLAG($4>=$5);
  860: :
  861:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
  862:     $1<= ;
  863: 
  864: )
  865: 
  866: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
  867: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
  868: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
  869: 
  870: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
  871: define(dcomparisons,
  872: $1=	( $2 -- f )		$6	$3equals
  873: #ifdef BUGGY_LONG_LONG
  874: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
  875: #else
  876: f = FLAG($4==$5);
  877: #endif
  878: 
  879: $1<>	( $2 -- f )		$7	$3not_equals
  880: #ifdef BUGGY_LONG_LONG
  881: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
  882: #else
  883: f = FLAG($4!=$5);
  884: #endif
  885: 
  886: $1<	( $2 -- f )		$8	$3less_than
  887: #ifdef BUGGY_LONG_LONG
  888: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
  889: #else
  890: f = FLAG($4<$5);
  891: #endif
  892: 
  893: $1>	( $2 -- f )		$9	$3greater_than
  894: #ifdef BUGGY_LONG_LONG
  895: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
  896: #else
  897: f = FLAG($4>$5);
  898: #endif
  899: 
  900: $1<=	( $2 -- f )		gforth	$3less_or_equal
  901: #ifdef BUGGY_LONG_LONG
  902: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
  903: #else
  904: f = FLAG($4<=$5);
  905: #endif
  906: 
  907: $1>=	( $2 -- f )		gforth	$3greater_or_equal
  908: #ifdef BUGGY_LONG_LONG
  909: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
  910: #else
  911: f = FLAG($4>=$5);
  912: #endif
  913: 
  914: )
  915: 
  916: \+dcomps
  917: 
  918: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
  919: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
  920: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
  921: 
  922: \+
  923: 
  924: within	( u1 u2 u3 -- f )		core-ext
  925: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
  926: unsigned and signed numbers (but not a mixture).  Another way to think
  927: about this word is to consider the numbers as a circle (wrapping
  928: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
  929: min-n for signed numbers); now consider the range from u2 towards
  930: increasing numbers up to and excluding u3 (giving an empty range if
  931: u2=u3); if u1 is in this range, @code{within} returns true.""
  932: f = FLAG(u1-u2 < u3-u2);
  933: :
  934:  over - >r - r> u< ;
  935: 
  936: \g internal
  937: 
  938: sp@	( -- a_addr )		gforth		sp_fetch
  939: a_addr = sp+1;
  940: 
  941: sp!	( a_addr -- )		gforth		sp_store
  942: sp = a_addr;
  943: /* works with and without spTOS caching */
  944: 
  945: rp@	( -- a_addr )		gforth		rp_fetch
  946: a_addr = rp;
  947: 
  948: rp!	( a_addr -- )		gforth		rp_store
  949: rp = a_addr;
  950: 
  951: \+floating
  952: 
  953: fp@	( -- f_addr )	gforth	fp_fetch
  954: f_addr = fp;
  955: 
  956: fp!	( f_addr -- )	gforth	fp_store
  957: fp = f_addr;
  958: 
  959: \+
  960: 
  961: ;s	( R:w -- )		gforth	semis
  962: ""The primitive compiled by @code{EXIT}.""
  963: SET_IP((Xt *)w);
  964: 
  965: \g stack
  966: 
  967: >r	( w -- R:w )		core	to_r
  968: :
  969:  (>r) ;
  970: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
  971: 
  972: r>	( R:w -- w )		core	r_from
  973: :
  974:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
  975: Create (rdrop) ' ;s A,
  976: 
  977: rdrop	( R:w -- )		gforth
  978: :
  979:  r> r> drop >r ;
  980: 
  981: 2>r	( w1 w2 -- R:w1 R:w2 )	core-ext	two_to_r
  982: :
  983:  swap r> swap >r swap >r >r ;
  984: 
  985: 2r>	( R:w1 R:w2 -- w1 w2 )	core-ext	two_r_from
  986: :
  987:  r> r> swap r> swap >r swap ;
  988: 
  989: 2r@	( R:w1 R:w2 -- R:w1 R:w2 w1 w2 )	core-ext	two_r_fetch
  990: :
  991:  i' j ;
  992: 
  993: 2rdrop	(  R:w1 R:w2 -- )		gforth	two_r_drop
  994: :
  995:  r> r> drop r> drop >r ;
  996: 
  997: over	( w1 w2 -- w1 w2 w1 )		core
  998: :
  999:  sp@ cell+ @ ;
 1000: 
 1001: drop	( w -- )		core
 1002: :
 1003:  IF THEN ;
 1004: 
 1005: swap	( w1 w2 -- w2 w1 )		core
 1006: :
 1007:  >r (swap) ! r> (swap) @ ;
 1008: Variable (swap)
 1009: 
 1010: dup	( w -- w w )		core	dupe
 1011: :
 1012:  sp@ @ ;
 1013: 
 1014: rot	( w1 w2 w3 -- w2 w3 w1 )	core	rote
 1015: :
 1016: [ defined? (swap) [IF] ]
 1017:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
 1018: Variable (rot)
 1019: [ELSE] ]
 1020:     >r swap r> swap ;
 1021: [THEN]
 1022: 
 1023: -rot	( w1 w2 w3 -- w3 w1 w2 )	gforth	not_rote
 1024: :
 1025:  rot rot ;
 1026: 
 1027: nip	( w1 w2 -- w2 )		core-ext
 1028: :
 1029:  swap drop ;
 1030: 
 1031: tuck	( w1 w2 -- w2 w1 w2 )	core-ext
 1032: :
 1033:  swap over ;
 1034: 
 1035: ?dup	( w -- w )			core	question_dupe
 1036: ""Actually the stack effect is: @code{( w -- 0 | w w )}.  It performs a
 1037: @code{dup} if w is nonzero.""
 1038: if (w!=0) {
 1039:   IF_spTOS(*sp-- = w;)
 1040: #ifndef USE_TOS
 1041:   *--sp = w;
 1042: #endif
 1043: }
 1044: :
 1045:  dup IF dup THEN ;
 1046: 
 1047: pick	( u -- w )			core-ext
 1048: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
 1049: w = sp[u+1];
 1050: :
 1051:  1+ cells sp@ + @ ;
 1052: 
 1053: 2drop	( w1 w2 -- )		core	two_drop
 1054: :
 1055:  drop drop ;
 1056: 
 1057: 2dup	( w1 w2 -- w1 w2 w1 w2 )	core	two_dupe
 1058: :
 1059:  over over ;
 1060: 
 1061: 2over	( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )	core	two_over
 1062: :
 1063:  3 pick 3 pick ;
 1064: 
 1065: 2swap	( w1 w2 w3 w4 -- w3 w4 w1 w2 )	core	two_swap
 1066: :
 1067:  rot >r rot r> ;
 1068: 
 1069: 2rot	( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )	double-ext	two_rote
 1070: :
 1071:  >r >r 2swap r> r> 2swap ;
 1072: 
 1073: 2nip	( w1 w2 w3 w4 -- w3 w4 )	gforth	two_nip
 1074: :
 1075:  2swap 2drop ;
 1076: 
 1077: 2tuck	( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )	gforth	two_tuck
 1078: :
 1079:  2swap 2over ;
 1080: 
 1081: \ toggle is high-level: 0.11/0.42%
 1082: 
 1083: @	( a_addr -- w )		core	fetch
 1084: ""@i{w} is the cell stored at @i{a_addr}.""
 1085: w = *a_addr;
 1086: 
 1087: !	( w a_addr -- )		core	store
 1088: ""Store @i{w} into the cell at @i{a-addr}.""
 1089: *a_addr = w;
 1090: 
 1091: +!	( n a_addr -- )		core	plus_store
 1092: ""Add @i{n} to the cell at @i{a-addr}.""
 1093: *a_addr += n;
 1094: :
 1095:  tuck @ + swap ! ;
 1096: 
 1097: c@	( c_addr -- c )		core	c_fetch
 1098: ""@i{c} is the char stored at @i{c_addr}.""
 1099: c = *c_addr;
 1100: :
 1101: [ bigendian [IF] ]
 1102:     [ cell>bit 4 = [IF] ]
 1103: 	dup [ 0 cell - ] Literal and @ swap 1 and
 1104: 	IF  $FF and  ELSE  8>>  THEN  ;
 1105:     [ [ELSE] ]
 1106: 	dup [ cell 1- ] literal and
 1107: 	tuck - @ swap [ cell 1- ] literal xor
 1108:  	0 ?DO 8>> LOOP $FF and
 1109:     [ [THEN] ]
 1110: [ [ELSE] ]
 1111:     [ cell>bit 4 = [IF] ]
 1112: 	dup [ 0 cell - ] Literal and @ swap 1 and
 1113: 	IF  8>>  ELSE  $FF and  THEN
 1114:     [ [ELSE] ]
 1115: 	dup [ cell  1- ] literal and 
 1116: 	tuck - @ swap
 1117: 	0 ?DO 8>> LOOP 255 and
 1118:     [ [THEN] ]
 1119: [ [THEN] ]
 1120: ;
 1121: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
 1122: 
 1123: c!	( c c_addr -- )		core	c_store
 1124: ""Store @i{c} into the char at @i{c-addr}.""
 1125: *c_addr = c;
 1126: :
 1127: [ bigendian [IF] ]
 1128:     [ cell>bit 4 = [IF] ]
 1129: 	tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
 1130: 	dup -2 and @ over 1 and cells masks + @ and
 1131: 	r> or swap -2 and ! ;
 1132: 	Create masks $00FF , $FF00 ,
 1133:     [ELSE] ]
 1134: 	dup [ cell 1- ] literal and dup 
 1135: 	[ cell 1- ] literal xor >r
 1136: 	- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
 1137: 	rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
 1138:     [THEN]
 1139: [ELSE] ]
 1140:     [ cell>bit 4 = [IF] ]
 1141: 	tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
 1142: 	dup -2 and @ over 1 and cells masks + @ and
 1143: 	r> or swap -2 and ! ;
 1144: 	Create masks $FF00 , $00FF ,
 1145:     [ELSE] ]
 1146: 	dup [ cell 1- ] literal and dup >r
 1147: 	- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
 1148: 	rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
 1149:     [THEN]
 1150: [THEN]
 1151: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
 1152: 
 1153: 2!	( w1 w2 a_addr -- )		core	two_store
 1154: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
 1155: a_addr[0] = w2;
 1156: a_addr[1] = w1;
 1157: :
 1158:  tuck ! cell+ ! ;
 1159: 
 1160: 2@	( a_addr -- w1 w2 )		core	two_fetch
 1161: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
 1162: the content of the next cell.""
 1163: w2 = a_addr[0];
 1164: w1 = a_addr[1];
 1165: :
 1166:  dup cell+ @ swap @ ;
 1167: 
 1168: cell+	( a_addr1 -- a_addr2 )	core	cell_plus
 1169: ""@code{1 cells +}""
 1170: a_addr2 = a_addr1+1;
 1171: :
 1172:  cell + ;
 1173: 
 1174: cells	( n1 -- n2 )		core
 1175: "" @i{n2} is the number of address units of @i{n1} cells.""
 1176: n2 = n1 * sizeof(Cell);
 1177: :
 1178:  [ cell
 1179:  2/ dup [IF] ] 2* [ [THEN]
 1180:  2/ dup [IF] ] 2* [ [THEN]
 1181:  2/ dup [IF] ] 2* [ [THEN]
 1182:  2/ dup [IF] ] 2* [ [THEN]
 1183:  drop ] ;
 1184: 
 1185: char+	( c_addr1 -- c_addr2 )	core	char_plus
 1186: ""@code{1 chars +}.""
 1187: c_addr2 = c_addr1 + 1;
 1188: :
 1189:  1+ ;
 1190: 
 1191: (chars)	( n1 -- n2 )	gforth	paren_chars
 1192: n2 = n1 * sizeof(Char);
 1193: :
 1194:  ;
 1195: 
 1196: count	( c_addr1 -- c_addr2 u )	core
 1197: ""@i{c-addr2} is the first character and @i{u} the length of the
 1198: counted string at @i{c-addr1}.""
 1199: u = *c_addr1;
 1200: c_addr2 = c_addr1+1;
 1201: :
 1202:  dup 1+ swap c@ ;
 1203: 
 1204: (f83find)	( c_addr u f83name1 -- f83name2 )	new	paren_f83find
 1205: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
 1206:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
 1207:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
 1208:     break;
 1209: f83name2=f83name1;
 1210: :
 1211:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
 1212: 	>r 2dup r@ cell+ char+ capscomp  0=
 1213: 	IF  2drop r>  EXIT  THEN
 1214: 	r> @
 1215:     REPEAT  THEN  nip nip ;
 1216: : (find-samelen) ( u f83name1 -- u f83name2/0 )
 1217:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL THEN ;
 1218: 
 1219: \+hash
 1220: 
 1221: (hashfind)	( c_addr u a_addr -- f83name2 )	new	paren_hashfind
 1222: struct F83Name *f83name1;
 1223: f83name2=NULL;
 1224: while(a_addr != NULL)
 1225: {
 1226:    f83name1=(struct F83Name *)(a_addr[1]);
 1227:    a_addr=(Cell *)(a_addr[0]);
 1228:    if ((UCell)F83NAME_COUNT(f83name1)==u &&
 1229:        memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
 1230:      {
 1231: 	f83name2=f83name1;
 1232: 	break;
 1233:      }
 1234: }
 1235: :
 1236:  BEGIN  dup  WHILE
 1237:         2@ >r >r dup r@ cell+ c@ $1F and =
 1238:         IF  2dup r@ cell+ char+ capscomp 0=
 1239: 	    IF  2drop r> rdrop  EXIT  THEN  THEN
 1240: 	rdrop r>
 1241:  REPEAT nip nip ;
 1242: 
 1243: (tablefind)	( c_addr u a_addr -- f83name2 )	new	paren_tablefind
 1244: ""A case-sensitive variant of @code{(hashfind)}""
 1245: struct F83Name *f83name1;
 1246: f83name2=NULL;
 1247: while(a_addr != NULL)
 1248: {
 1249:    f83name1=(struct F83Name *)(a_addr[1]);
 1250:    a_addr=(Cell *)(a_addr[0]);
 1251:    if ((UCell)F83NAME_COUNT(f83name1)==u &&
 1252:        memcmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
 1253:      {
 1254: 	f83name2=f83name1;
 1255: 	break;
 1256:      }
 1257: }
 1258: :
 1259:  BEGIN  dup  WHILE
 1260:         2@ >r >r dup r@ cell+ c@ $1F and =
 1261:         IF  2dup r@ cell+ char+ -text 0=
 1262: 	    IF  2drop r> rdrop  EXIT  THEN  THEN
 1263: 	rdrop r>
 1264:  REPEAT nip nip ;
 1265: 
 1266: (hashkey)	( c_addr u1 -- u2 )		gforth	paren_hashkey
 1267: u2=0;
 1268: while(u1--)
 1269:    u2+=(Cell)toupper(*c_addr++);
 1270: :
 1271:  0 -rot bounds ?DO  I c@ toupper +  LOOP ;
 1272: 
 1273: (hashkey1)	( c_addr u ubits -- ukey )		gforth	paren_hashkey1
 1274: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
 1275: /* this hash function rotates the key at every step by rot bits within
 1276:    ubits bits and xors it with the character. This function does ok in
 1277:    the chi-sqare-test.  Rot should be <=7 (preferably <=5) for
 1278:    ASCII strings (larger if ubits is large), and should share no
 1279:    divisors with ubits.
 1280: */
 1281: unsigned rot = ((char []){5,0,1,2,3,4,5,5,5,5,3,5,5,5,5,7,5,5,5,5,7,5,5,5,5,6,5,5,5,5,7,5,5})[ubits];
 1282: Char *cp = c_addr;
 1283: for (ukey=0; cp<c_addr+u; cp++)
 1284:     ukey = ((((ukey<<rot) | (ukey>>(ubits-rot))) 
 1285: 	     ^ toupper(*cp))
 1286: 	    & ((1<<ubits)-1));
 1287: :
 1288:  dup rot-values + c@ over 1 swap lshift 1- >r
 1289:  tuck - 2swap r> 0 2swap bounds
 1290:  ?DO  dup 4 pick lshift swap 3 pick rshift or
 1291:       I c@ toupper xor
 1292:       over and  LOOP
 1293:  nip nip nip ;
 1294: Create rot-values
 1295:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
 1296:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
 1297:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
 1298:   7 c, 5 c, 5 c,
 1299: 
 1300: \+
 1301: 
 1302: (parse-white)	( c_addr1 u1 -- c_addr2 u2 )	gforth	paren_parse_white
 1303: /* use !isgraph instead of isspace? */
 1304: Char *endp = c_addr1+u1;
 1305: while (c_addr1<endp && isspace(*c_addr1))
 1306:   c_addr1++;
 1307: if (c_addr1<endp) {
 1308:   for (c_addr2 = c_addr1; c_addr1<endp && !isspace(*c_addr1); c_addr1++)
 1309:     ;
 1310:   u2 = c_addr1-c_addr2;
 1311: }
 1312: else {
 1313:   c_addr2 = c_addr1;
 1314:   u2 = 0;
 1315: }
 1316: :
 1317:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
 1318:  REPEAT  THEN  2dup
 1319:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
 1320:  REPEAT  THEN  nip - ;
 1321: 
 1322: aligned	( c_addr -- a_addr )	core
 1323: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
 1324: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
 1325: :
 1326:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
 1327: 
 1328: faligned	( c_addr -- f_addr )	float	f_aligned
 1329: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
 1330: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
 1331: :
 1332:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
 1333: 
 1334: >body	( xt -- a_addr )	core	to_body
 1335: "" Get the address of the body of the word represented by @i{xt} (the address
 1336: of the word's data field).""
 1337: a_addr = PFA(xt);
 1338: :
 1339:     2 cells + ;
 1340: 
 1341: \ threading stuff is currently only interesting if we have a compiler
 1342: \fhas? standardthreading has? compiler and [IF]
 1343: 
 1344: >code-address	( xt -- c_addr )		gforth	to_code_address
 1345: ""@i{c-addr} is the code address of the word @i{xt}.""
 1346: /* !! This behaves installation-dependently for DOES-words */
 1347: c_addr = (Address)CODE_ADDRESS(xt);
 1348: :
 1349:     @ ;
 1350: 
 1351: >does-code	( xt -- a_addr )		gforth	to_does_code
 1352: ""If @i{xt} is the execution token of a child of a @code{DOES>} word,
 1353: @i{a-addr} is the start of the Forth code after the @code{DOES>};
 1354: Otherwise @i{a-addr} is 0.""
 1355: a_addr = (Cell *)DOES_CODE(xt);
 1356: :
 1357:     cell+ @ ;
 1358: 
 1359: code-address!	( c_addr xt -- )		gforth	code_address_store
 1360: ""Create a code field with code address @i{c-addr} at @i{xt}.""
 1361: MAKE_CF(xt, c_addr);
 1362: :
 1363:     ! ;
 1364: 
 1365: does-code!	( a_addr xt -- )		gforth	does_code_store
 1366: ""Create a code field at @i{xt} for a child of a @code{DOES>}-word;
 1367: @i{a-addr} is the start of the Forth code after @code{DOES>}.""
 1368: MAKE_DOES_CF(xt, a_addr);
 1369: :
 1370:     dodoes: over ! cell+ ! ;
 1371: 
 1372: does-handler!	( a_addr -- )	gforth	does_handler_store
 1373: ""Create a @code{DOES>}-handler at address @i{a-addr}. Normally,
 1374: @i{a-addr} points just behind a @code{DOES>}.""
 1375: MAKE_DOES_HANDLER(a_addr);
 1376: :
 1377:     drop ;
 1378: 
 1379: /does-handler	( -- n )	gforth	slash_does_handler
 1380: ""The size of a @code{DOES>}-handler (includes possible padding).""
 1381: /* !! a constant or environmental query might be better */
 1382: n = DOES_HANDLER_SIZE;
 1383: :
 1384:     2 cells ;
 1385: 
 1386: threading-method	( -- n )	gforth	threading_method
 1387: ""0 if the engine is direct threaded. Note that this may change during
 1388: the lifetime of an image.""
 1389: #if defined(DOUBLY_INDIRECT)
 1390: n=2;
 1391: #else
 1392: # if defined(DIRECT_THREADED)
 1393: n=0;
 1394: # else
 1395: n=1;
 1396: # endif
 1397: #endif
 1398: :
 1399:  1 ;
 1400: 
 1401: \f[THEN]
 1402: 
 1403: \g hostos
 1404: 
 1405: key-file	( wfileid -- n )		gforth	paren_key_file
 1406: #ifdef HAS_FILE
 1407: fflush(stdout);
 1408: n = key((FILE*)wfileid);
 1409: #else
 1410: n = key(stdin);
 1411: #endif
 1412: 
 1413: key?-file	( wfileid -- n )		facility	key_q_file
 1414: #ifdef HAS_FILE
 1415: fflush(stdout);
 1416: n = key_query((FILE*)wfileid);
 1417: #else
 1418: n = key_query(stdin);
 1419: #endif
 1420: 
 1421: \+os
 1422: 
 1423: stdin	( -- wfileid )	gforth
 1424: wfileid = (Cell)stdin;
 1425: 
 1426: stdout	( -- wfileid )	gforth
 1427: wfileid = (Cell)stdout;
 1428: 
 1429: stderr	( -- wfileid )	gforth
 1430: wfileid = (Cell)stderr;
 1431: 
 1432: form	( -- urows ucols )	gforth
 1433: ""The number of lines and columns in the terminal. These numbers may change
 1434: with the window size.""
 1435: /* we could block SIGWINCH here to get a consistent size, but I don't
 1436:  think this is necessary or always beneficial */
 1437: urows=rows;
 1438: ucols=cols;
 1439: 
 1440: flush-icache	( c_addr u -- )	gforth	flush_icache
 1441: ""Make sure that the instruction cache of the processor (if there is
 1442: one) does not contain stale data at @i{c-addr} and @i{u} bytes
 1443: afterwards. @code{END-CODE} performs a @code{flush-icache}
 1444: automatically. Caveat: @code{flush-icache} might not work on your
 1445: installation; this is usually the case if direct threading is not
 1446: supported on your machine (take a look at your @file{machine.h}) and
 1447: your machine has a separate instruction cache. In such cases,
 1448: @code{flush-icache} does nothing instead of flushing the instruction
 1449: cache.""
 1450: FLUSH_ICACHE(c_addr,u);
 1451: 
 1452: (bye)	( n -- )	gforth	paren_bye
 1453: SUPER_END;
 1454: return (Label *)n;
 1455: 
 1456: (system)	( c_addr u -- wretval wior )	gforth	peren_system
 1457: #ifndef MSDOS
 1458: int old_tp=terminal_prepped;
 1459: deprep_terminal();
 1460: #endif
 1461: wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
 1462: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
 1463: #ifndef MSDOS
 1464: if (old_tp)
 1465:   prep_terminal();
 1466: #endif
 1467: 
 1468: getenv	( c_addr1 u1 -- c_addr2 u2 )	gforth
 1469: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
 1470: is the host operating system's expansion of that environment variable. If the
 1471: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
 1472: in length.""
 1473: /* close ' to keep fontify happy */
 1474: c_addr2 = getenv(cstr(c_addr1,u1,1));
 1475: u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
 1476: 
 1477: open-pipe	( c_addr u wfam -- wfileid wior )	gforth	open_pipe
 1478: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
 1479: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
 1480: 
 1481: close-pipe	( wfileid -- wretval wior )		gforth	close_pipe
 1482: wretval = pclose((FILE *)wfileid);
 1483: wior = IOR(wretval==-1);
 1484: 
 1485: time&date	( -- nsec nmin nhour nday nmonth nyear )	facility-ext	time_and_date
 1486: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
 1487: Months are numbered from 1.""
 1488: struct timeval time1;
 1489: struct timezone zone1;
 1490: struct tm *ltime;
 1491: gettimeofday(&time1,&zone1);
 1492: /* !! Single Unix specification: 
 1493:    If tzp is not a null pointer, the behaviour is unspecified. */
 1494: ltime=localtime((time_t *)&time1.tv_sec);
 1495: nyear =ltime->tm_year+1900;
 1496: nmonth=ltime->tm_mon+1;
 1497: nday  =ltime->tm_mday;
 1498: nhour =ltime->tm_hour;
 1499: nmin  =ltime->tm_min;
 1500: nsec  =ltime->tm_sec;
 1501: 
 1502: ms	( n -- )	facility-ext
 1503: ""Wait at least @i{n} milli-second.""
 1504: struct timeval timeout;
 1505: timeout.tv_sec=n/1000;
 1506: timeout.tv_usec=1000*(n%1000);
 1507: (void)select(0,0,0,0,&timeout);
 1508: 
 1509: allocate	( u -- a_addr wior )	memory
 1510: ""Allocate @i{u} address units of contiguous data space. The initial
 1511: contents of the data space is undefined. If the allocation is successful,
 1512: @i{a-addr} is the start address of the allocated region and @i{wior}
 1513: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
 1514: is a non-zero I/O result code.""
 1515: a_addr = (Cell *)malloc(u?u:1);
 1516: wior = IOR(a_addr==NULL);
 1517: 
 1518: free	( a_addr -- wior )		memory
 1519: ""Return the region of data space starting at @i{a-addr} to the system.
 1520: The region must originally have been obtained using @code{allocate} or
 1521: @code{resize}. If the operational is successful, @i{wior} is 0.
 1522: If the operation fails, @i{wior} is a non-zero I/O result code.""
 1523: free(a_addr);
 1524: wior = 0;
 1525: 
 1526: resize	( a_addr1 u -- a_addr2 wior )	memory
 1527: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
 1528: address units, possibly moving the contents to a different
 1529: area. @i{a-addr2} is the address of the resulting area.
 1530: If the operation is successful, @i{wior} is 0.
 1531: If the operation fails, @i{wior} is a non-zero
 1532: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
 1533: @code{resize} @code{allocate}s @i{u} address units.""
 1534: /* the following check is not necessary on most OSs, but it is needed
 1535:    on SunOS 4.1.2. */
 1536: /* close ' to keep fontify happy */
 1537: if (a_addr1==NULL)
 1538:   a_addr2 = (Cell *)malloc(u);
 1539: else
 1540:   a_addr2 = (Cell *)realloc(a_addr1, u);
 1541: wior = IOR(a_addr2==NULL);	/* !! Define a return code */
 1542: 
 1543: strerror	( n -- c_addr u )	gforth
 1544: c_addr = strerror(n);
 1545: u = strlen(c_addr);
 1546: 
 1547: strsignal	( n -- c_addr u )	gforth
 1548: c_addr = strsignal(n);
 1549: u = strlen(c_addr);
 1550: 
 1551: call-c	( w -- )	gforth	call_c
 1552: ""Call the C function pointed to by @i{w}. The C function has to
 1553: access the stack itself. The stack pointers are exported in the global
 1554: variables @code{SP} and @code{FP}.""
 1555: /* This is a first attempt at support for calls to C. This may change in
 1556:    the future */
 1557: IF_fpTOS(fp[0]=fpTOS);
 1558: FP=fp;
 1559: SP=sp;
 1560: ((void (*)())w)();
 1561: sp=SP;
 1562: fp=FP;
 1563: IF_spTOS(spTOS=sp[0]);
 1564: IF_fpTOS(fpTOS=fp[0]);
 1565: 
 1566: \+
 1567: \+file
 1568: 
 1569: close-file	( wfileid -- wior )		file	close_file
 1570: wior = IOR(fclose((FILE *)wfileid)==EOF);
 1571: 
 1572: open-file	( c_addr u wfam -- wfileid wior )	file	open_file
 1573: wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
 1574: wior =  IOR(wfileid == 0);
 1575: 
 1576: create-file	( c_addr u wfam -- wfileid wior )	file	create_file
 1577: Cell	fd;
 1578: fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[wfam], 0666);
 1579: if (fd != -1) {
 1580:   wfileid = (Cell)fdopen(fd, fileattr[wfam]);
 1581:   wior = IOR(wfileid == 0);
 1582: } else {
 1583:   wfileid = 0;
 1584:   wior = IOR(1);
 1585: }
 1586: 
 1587: delete-file	( c_addr u -- wior )		file	delete_file
 1588: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
 1589: 
 1590: rename-file	( c_addr1 u1 c_addr2 u2 -- wior )	file-ext	rename_file
 1591: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
 1592: char *s1=tilde_cstr(c_addr2, u2, 1);
 1593: wior = IOR(rename(tilde_cstr(c_addr1, u1, 0), s1)==-1);
 1594: 
 1595: file-position	( wfileid -- ud wior )	file	file_position
 1596: /* !! use tell and lseek? */
 1597: ud = LONG2UD(ftell((FILE *)wfileid));
 1598: wior = IOR(UD2LONG(ud)==-1);
 1599: 
 1600: reposition-file	( ud wfileid -- wior )	file	reposition_file
 1601: wior = IOR(fseek((FILE *)wfileid, UD2LONG(ud), SEEK_SET)==-1);
 1602: 
 1603: file-size	( wfileid -- ud wior )	file	file_size
 1604: struct stat buf;
 1605: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
 1606: ud = LONG2UD(buf.st_size);
 1607: 
 1608: resize-file	( ud wfileid -- wior )	file	resize_file
 1609: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2LONG(ud))==-1);
 1610: 
 1611: read-file	( c_addr u1 wfileid -- u2 wior )	file	read_file
 1612: /* !! fread does not guarantee enough */
 1613: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
 1614: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
 1615: /* !! is the value of ferror errno-compatible? */
 1616: if (wior)
 1617:   clearerr((FILE *)wfileid);
 1618: 
 1619: read-line	( c_addr u1 wfileid -- u2 flag wior )	file	read_line
 1620: /* this may one day be replaced with : read-line (read-line) nip ; */
 1621: Cell c;
 1622: flag=-1;
 1623: for(u2=0; u2<u1; u2++)
 1624: {
 1625:    c = getc((FILE *)wfileid);
 1626:    if (c=='\n') break;
 1627:    if (c=='\r') {
 1628:      if ((c = getc((FILE *)wfileid))!='\n')
 1629:        ungetc(c,(FILE *)wfileid);
 1630:      break;
 1631:    }
 1632:    if (c==EOF) {
 1633: 	flag=FLAG(u2!=0);
 1634: 	break;
 1635:      }
 1636:    c_addr[u2] = (Char)c;
 1637: }
 1638: wior=FILEIO(ferror((FILE *)wfileid));
 1639: 
 1640: \+
 1641: 
 1642: write-file	( c_addr u1 wfileid -- wior )	file	write_file
 1643: /* !! fwrite does not guarantee enough */
 1644: #ifdef HAS_FILE
 1645: {
 1646:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
 1647:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
 1648:   if (wior)
 1649:     clearerr((FILE *)wfileid);
 1650: }
 1651: #else
 1652: TYPE(c_addr, u1);
 1653: #endif
 1654: 
 1655: emit-file	( c wfileid -- wior )	gforth	emit_file
 1656: #ifdef HAS_FILE
 1657: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
 1658: if (wior)
 1659:   clearerr((FILE *)wfileid);
 1660: #else
 1661: PUTC(c);
 1662: #endif
 1663: 
 1664: \+file
 1665: 
 1666: flush-file	( wfileid -- wior )		file-ext	flush_file
 1667: wior = IOR(fflush((FILE *) wfileid)==EOF);
 1668: 
 1669: file-status	( c_addr u -- wfam wior )	file-ext	file_status
 1670: char *filename=tilde_cstr(c_addr, u, 1);
 1671: if (access (filename, F_OK) != 0) {
 1672:   wfam=0;
 1673:   wior=IOR(1);
 1674: }
 1675: else if (access (filename, R_OK | W_OK) == 0) {
 1676:   wfam=2; /* r/w */
 1677:   wior=0;
 1678: }
 1679: else if (access (filename, R_OK) == 0) {
 1680:   wfam=0; /* r/o */
 1681:   wior=0;
 1682: }
 1683: else if (access (filename, W_OK) == 0) {
 1684:   wfam=4; /* w/o */
 1685:   wior=0;
 1686: }
 1687: else {
 1688:   wfam=1; /* well, we cannot access the file, but better deliver a legal
 1689: 	    access mode (r/o bin), so we get a decent error later upon open. */
 1690:   wior=0;
 1691: }
 1692: 
 1693: \+
 1694: \+floating
 1695: 
 1696: \g floating
 1697: 
 1698: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
 1699: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
 1700: 
 1701: d>f	( d -- r )		float	d_to_f
 1702: #ifdef BUGGY_LONG_LONG
 1703: extern double ldexp(double x, int exp);
 1704: r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
 1705: #else
 1706: r = d;
 1707: #endif
 1708: 
 1709: f>d	( r -- d )		float	f_to_d
 1710: #ifdef BUGGY_LONG_LONG
 1711: d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
 1712: d.lo = r-ldexp((Float)d.hi,CELL_BITS);
 1713: #else
 1714: d = r;
 1715: #endif
 1716: 
 1717: f!	( r f_addr -- )	float	f_store
 1718: ""Store @i{r} into the float at address @i{f-addr}.""
 1719: *f_addr = r;
 1720: 
 1721: f@	( f_addr -- r )	float	f_fetch
 1722: ""@i{r} is the float at address @i{f-addr}.""
 1723: r = *f_addr;
 1724: 
 1725: df@	( df_addr -- r )	float-ext	d_f_fetch
 1726: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
 1727: #ifdef IEEE_FP
 1728: r = *df_addr;
 1729: #else
 1730: !! df@
 1731: #endif
 1732: 
 1733: df!	( r df_addr -- )	float-ext	d_f_store
 1734: ""Store @i{r} as double-precision IEEE floating-point value to the
 1735: address @i{df-addr}.""
 1736: #ifdef IEEE_FP
 1737: *df_addr = r;
 1738: #else
 1739: !! df!
 1740: #endif
 1741: 
 1742: sf@	( sf_addr -- r )	float-ext	s_f_fetch
 1743: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
 1744: #ifdef IEEE_FP
 1745: r = *sf_addr;
 1746: #else
 1747: !! sf@
 1748: #endif
 1749: 
 1750: sf!	( r sf_addr -- )	float-ext	s_f_store
 1751: ""Store @i{r} as single-precision IEEE floating-point value to the
 1752: address @i{sf-addr}.""
 1753: #ifdef IEEE_FP
 1754: *sf_addr = r;
 1755: #else
 1756: !! sf!
 1757: #endif
 1758: 
 1759: f+	( r1 r2 -- r3 )	float	f_plus
 1760: r3 = r1+r2;
 1761: 
 1762: f-	( r1 r2 -- r3 )	float	f_minus
 1763: r3 = r1-r2;
 1764: 
 1765: f*	( r1 r2 -- r3 )	float	f_star
 1766: r3 = r1*r2;
 1767: 
 1768: f/	( r1 r2 -- r3 )	float	f_slash
 1769: r3 = r1/r2;
 1770: 
 1771: f**	( r1 r2 -- r3 )	float-ext	f_star_star
 1772: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
 1773: r3 = pow(r1,r2);
 1774: 
 1775: fnegate	( r1 -- r2 )	float	f_negate
 1776: r2 = - r1;
 1777: 
 1778: fdrop	( r -- )		float	f_drop
 1779: 
 1780: fdup	( r -- r r )	float	f_dupe
 1781: 
 1782: fswap	( r1 r2 -- r2 r1 )	float	f_swap
 1783: 
 1784: fover	( r1 r2 -- r1 r2 r1 )	float	f_over
 1785: 
 1786: frot	( r1 r2 r3 -- r2 r3 r1 )	float	f_rote
 1787: 
 1788: fnip	( r1 r2 -- r2 )	gforth	f_nip
 1789: 
 1790: ftuck	( r1 r2 -- r2 r1 r2 )	gforth	f_tuck
 1791: 
 1792: float+	( f_addr1 -- f_addr2 )	float	float_plus
 1793: ""@code{1 floats +}.""
 1794: f_addr2 = f_addr1+1;
 1795: 
 1796: floats	( n1 -- n2 )	float
 1797: ""@i{n2} is the number of address units of @i{n1} floats.""
 1798: n2 = n1*sizeof(Float);
 1799: 
 1800: floor	( r1 -- r2 )	float
 1801: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
 1802: /* !! unclear wording */
 1803: r2 = floor(r1);
 1804: 
 1805: fround	( r1 -- r2 )	float	f_round
 1806: ""Round to the nearest integral value.""
 1807: /* !! unclear wording */
 1808: #ifdef HAVE_RINT
 1809: r2 = rint(r1);
 1810: #else
 1811: r2 = floor(r1+0.5);
 1812: /* !! This is not quite true to the rounding rules given in the standard */
 1813: #endif
 1814: 
 1815: fmax	( r1 r2 -- r3 )	float	f_max
 1816: if (r1<r2)
 1817:   r3 = r2;
 1818: else
 1819:   r3 = r1;
 1820: 
 1821: fmin	( r1 r2 -- r3 )	float	f_min
 1822: if (r1<r2)
 1823:   r3 = r1;
 1824: else
 1825:   r3 = r2;
 1826: 
 1827: represent	( r c_addr u -- n f1 f2 )	float
 1828: char *sig;
 1829: int flag;
 1830: int decpt;
 1831: sig=ecvt(r, u, &decpt, &flag);
 1832: n=(r==0 ? 1 : decpt);
 1833: f1=FLAG(flag!=0);
 1834: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
 1835: memmove(c_addr,sig,u);
 1836: 
 1837: >float	( c_addr u -- flag )	float	to_float
 1838: ""Actual stack effect: ( c_addr u -- r t | f ).  Attempt to convert the
 1839: character string @i{c-addr u} to internal floating-point
 1840: representation. If the string represents a valid floating-point number
 1841: @i{r} is placed on the floating-point stack and @i{flag} is
 1842: true. Otherwise, @i{flag} is false. A string of blanks is a special
 1843: case and represents the floating-point number 0.""
 1844: /* real signature: c_addr u -- r t / f */
 1845: Float r;
 1846: char *number=cstr(c_addr, u, 1);
 1847: char *endconv;
 1848: int sign = 0;
 1849: if(number[0]=='-') {
 1850:    sign = 1;
 1851:    number++;
 1852:    u--;
 1853: }
 1854: while(isspace((unsigned)(number[--u])) && u>0);
 1855: switch(number[u])
 1856: {
 1857:    case 'd':
 1858:    case 'D':
 1859:    case 'e':
 1860:    case 'E':  break;
 1861:    default :  u++; break;
 1862: }
 1863: number[u]='\0';
 1864: r=strtod(number,&endconv);
 1865: if((flag=FLAG(!(Cell)*endconv)))
 1866: {
 1867:    IF_fpTOS(fp[0] = fpTOS);
 1868:    fp += -1;
 1869:    fpTOS = sign ? -r : r;
 1870: }
 1871: else if(*endconv=='d' || *endconv=='D')
 1872: {
 1873:    *endconv='E';
 1874:    r=strtod(number,&endconv);
 1875:    if((flag=FLAG(!(Cell)*endconv)))
 1876:      {
 1877: 	IF_fpTOS(fp[0] = fpTOS);
 1878: 	fp += -1;
 1879: 	fpTOS = sign ? -r : r;
 1880:      }
 1881: }
 1882: 
 1883: fabs	( r1 -- r2 )	float-ext	f_abs
 1884: r2 = fabs(r1);
 1885: 
 1886: facos	( r1 -- r2 )	float-ext	f_a_cos
 1887: r2 = acos(r1);
 1888: 
 1889: fasin	( r1 -- r2 )	float-ext	f_a_sine
 1890: r2 = asin(r1);
 1891: 
 1892: fatan	( r1 -- r2 )	float-ext	f_a_tan
 1893: r2 = atan(r1);
 1894: 
 1895: fatan2	( r1 r2 -- r3 )	float-ext	f_a_tan_two
 1896: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
 1897: intends this to be the inverse of @code{fsincos}. In gforth it is.""
 1898: r3 = atan2(r1,r2);
 1899: 
 1900: fcos	( r1 -- r2 )	float-ext	f_cos
 1901: r2 = cos(r1);
 1902: 
 1903: fexp	( r1 -- r2 )	float-ext	f_e_x_p
 1904: r2 = exp(r1);
 1905: 
 1906: fexpm1	( r1 -- r2 )	float-ext	f_e_x_p_m_one
 1907: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
 1908: #ifdef HAVE_EXPM1
 1909: extern double
 1910: #ifdef NeXT
 1911:               const
 1912: #endif
 1913:                     expm1(double);
 1914: r2 = expm1(r1);
 1915: #else
 1916: r2 = exp(r1)-1.;
 1917: #endif
 1918: 
 1919: fln	( r1 -- r2 )	float-ext	f_l_n
 1920: r2 = log(r1);
 1921: 
 1922: flnp1	( r1 -- r2 )	float-ext	f_l_n_p_one
 1923: ""@i{r2}=ln(@i{r1}+1)""
 1924: #ifdef HAVE_LOG1P
 1925: extern double
 1926: #ifdef NeXT
 1927:               const
 1928: #endif
 1929:                     log1p(double);
 1930: r2 = log1p(r1);
 1931: #else
 1932: r2 = log(r1+1.);
 1933: #endif
 1934: 
 1935: flog	( r1 -- r2 )	float-ext	f_log
 1936: ""The decimal logarithm.""
 1937: r2 = log10(r1);
 1938: 
 1939: falog	( r1 -- r2 )	float-ext	f_a_log
 1940: ""@i{r2}=10**@i{r1}""
 1941: extern double pow10(double);
 1942: r2 = pow10(r1);
 1943: 
 1944: fsin	( r1 -- r2 )	float-ext	f_sine
 1945: r2 = sin(r1);
 1946: 
 1947: fsincos	( r1 -- r2 r3 )	float-ext	f_sine_cos
 1948: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
 1949: r2 = sin(r1);
 1950: r3 = cos(r1);
 1951: 
 1952: fsqrt	( r1 -- r2 )	float-ext	f_square_root
 1953: r2 = sqrt(r1);
 1954: 
 1955: ftan	( r1 -- r2 )	float-ext	f_tan
 1956: r2 = tan(r1);
 1957: :
 1958:  fsincos f/ ;
 1959: 
 1960: fsinh	( r1 -- r2 )	float-ext	f_cinch
 1961: r2 = sinh(r1);
 1962: :
 1963:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
 1964: 
 1965: fcosh	( r1 -- r2 )	float-ext	f_cosh
 1966: r2 = cosh(r1);
 1967: :
 1968:  fexp fdup 1/f f+ f2/ ;
 1969: 
 1970: ftanh	( r1 -- r2 )	float-ext	f_tan_h
 1971: r2 = tanh(r1);
 1972: :
 1973:  f2* fexpm1 fdup 2. d>f f+ f/ ;
 1974: 
 1975: fasinh	( r1 -- r2 )	float-ext	f_a_cinch
 1976: r2 = asinh(r1);
 1977: :
 1978:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
 1979: 
 1980: facosh	( r1 -- r2 )	float-ext	f_a_cosh
 1981: r2 = acosh(r1);
 1982: :
 1983:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
 1984: 
 1985: fatanh	( r1 -- r2 )	float-ext	f_a_tan_h
 1986: r2 = atanh(r1);
 1987: :
 1988:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
 1989:  r> IF  fnegate  THEN ;
 1990: 
 1991: sfloats	( n1 -- n2 )	float-ext	s_floats
 1992: ""@i{n2} is the number of address units of @i{n1}
 1993: single-precision IEEE floating-point numbers.""
 1994: n2 = n1*sizeof(SFloat);
 1995: 
 1996: dfloats	( n1 -- n2 )	float-ext	d_floats
 1997: ""@i{n2} is the number of address units of @i{n1}
 1998: double-precision IEEE floating-point numbers.""
 1999: n2 = n1*sizeof(DFloat);
 2000: 
 2001: sfaligned	( c_addr -- sf_addr )	float-ext	s_f_aligned
 2002: ""@i{sf-addr} is the first single-float-aligned address greater
 2003: than or equal to @i{c-addr}.""
 2004: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
 2005: :
 2006:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
 2007: 
 2008: dfaligned	( c_addr -- df_addr )	float-ext	d_f_aligned
 2009: ""@i{df-addr} is the first double-float-aligned address greater
 2010: than or equal to @i{c-addr}.""
 2011: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
 2012: :
 2013:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
 2014: 
 2015: \ The following words access machine/OS/installation-dependent
 2016: \   Gforth internals
 2017: \ !! how about environmental queries DIRECT-THREADED,
 2018: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
 2019: 
 2020: \ local variable implementation primitives
 2021: \+
 2022: \+glocals
 2023: 
 2024: @local#	( #noffset -- w )	gforth	fetch_local_number
 2025: w = *(Cell *)(lp+noffset);
 2026: 
 2027: @local0	( -- w )	new	fetch_local_zero
 2028: w = *(Cell *)(lp+0*sizeof(Cell));
 2029: 
 2030: @local1	( -- w )	new	fetch_local_four
 2031: w = *(Cell *)(lp+1*sizeof(Cell));
 2032: 
 2033: @local2	( -- w )	new	fetch_local_eight
 2034: w = *(Cell *)(lp+2*sizeof(Cell));
 2035: 
 2036: @local3	( -- w )	new	fetch_local_twelve
 2037: w = *(Cell *)(lp+3*sizeof(Cell));
 2038: 
 2039: \+floating
 2040: 
 2041: f@local#	( #noffset -- r )	gforth	f_fetch_local_number
 2042: r = *(Float *)(lp+noffset);
 2043: 
 2044: f@local0	( -- r )	new	f_fetch_local_zero
 2045: r = *(Float *)(lp+0*sizeof(Float));
 2046: 
 2047: f@local1	( -- r )	new	f_fetch_local_eight
 2048: r = *(Float *)(lp+1*sizeof(Float));
 2049: 
 2050: \+
 2051: 
 2052: laddr#	( #noffset -- c_addr )	gforth	laddr_number
 2053: /* this can also be used to implement lp@ */
 2054: c_addr = (Char *)(lp+noffset);
 2055: 
 2056: lp+!#	( #noffset -- )	gforth	lp_plus_store_number
 2057: ""used with negative immediate values it allocates memory on the
 2058: local stack, a positive immediate argument drops memory from the local
 2059: stack""
 2060: lp += noffset;
 2061: 
 2062: lp-	( -- )	new	minus_four_lp_plus_store
 2063: lp += -sizeof(Cell);
 2064: 
 2065: lp+	( -- )	new	eight_lp_plus_store
 2066: lp += sizeof(Float);
 2067: 
 2068: lp+2	( -- )	new	sixteen_lp_plus_store
 2069: lp += 2*sizeof(Float);
 2070: 
 2071: lp!	( c_addr -- )	gforth	lp_store
 2072: lp = (Address)c_addr;
 2073: 
 2074: >l	( w -- )	gforth	to_l
 2075: lp -= sizeof(Cell);
 2076: *(Cell *)lp = w;
 2077: 
 2078: \+floating
 2079: 
 2080: f>l	( r -- )	gforth	f_to_l
 2081: lp -= sizeof(Float);
 2082: *(Float *)lp = r;
 2083: 
 2084: fpick	( u -- r )		gforth
 2085: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
 2086: r = fp[u+1]; /* +1, because update of fp happens before this fragment */
 2087: :
 2088:  floats fp@ + f@ ;
 2089: 
 2090: \+
 2091: \+
 2092: 
 2093: \+OS
 2094: 
 2095: define(`uploop',
 2096:        `pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
 2097: define(`_uploop',
 2098:        `ifelse($1, `$3', `$5',
 2099: 	       `$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
 2100: \ argflist(argnum): Forth argument list
 2101: define(argflist,
 2102:        `ifelse($1, 0, `',
 2103:                `uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
 2104: \ argdlist(argnum): declare C's arguments
 2105: define(argdlist,
 2106:        `ifelse($1, 0, `',
 2107:                `uploop(`_i', 1, $1, `Cell, ', `Cell')')')
 2108: \ argclist(argnum): pass C's arguments
 2109: define(argclist,
 2110:        `ifelse($1, 0, `',
 2111:                `uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
 2112: \ icall(argnum)
 2113: define(icall,
 2114: `icall$1	( argflist($1)u -- uret )	gforth
 2115: uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
 2116: 
 2117: ')
 2118: define(fcall,
 2119: `fcall$1	( argflist($1)u -- rret )	gforth
 2120: rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
 2121: 
 2122: ')
 2123: 
 2124: \ close ' to keep fontify happy
 2125: 
 2126: open-lib	( c_addr1 u1 -- u2 )	gforth	open_lib
 2127: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
 2128: #ifndef RTLD_GLOBAL
 2129: #define RTLD_GLOBAL 0
 2130: #endif
 2131: u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL | RTLD_LAZY);
 2132: #else
 2133: #  ifdef _WIN32
 2134: u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
 2135: #  else
 2136: #warning Define open-lib!
 2137: u2 = 0;
 2138: #  endif
 2139: #endif
 2140: 
 2141: lib-sym	( c_addr1 u1 u2 -- u3 )	gforth	lib_sym
 2142: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
 2143: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
 2144: #else
 2145: #  ifdef _WIN32
 2146: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
 2147: #  else
 2148: #warning Define lib-sym!
 2149: u3 = 0;
 2150: #  endif
 2151: #endif
 2152: 
 2153: uploop(i, 0, 7, `icall(i)')
 2154: icall(20)
 2155: uploop(i, 0, 7, `fcall(i)')
 2156: fcall(20)
 2157: 
 2158: \+
 2159: 
 2160: up!	( a_addr -- )	gforth	up_store
 2161: UP=up=(char *)a_addr;
 2162: :
 2163:  up ! ;
 2164: Variable UP
 2165: 
 2166: wcall	( u -- )	gforth
 2167: IF_fpTOS(fp[0]=fpTOS);
 2168: FP=fp;
 2169: sp=(Cell*)(SYSCALL(Cell(*)(Cell *, void *))u)(sp, &FP);
 2170: fp=FP;
 2171: IF_spTOS(spTOS=sp[0];)
 2172: IF_fpTOS(fpTOS=fp[0]);
 2173: 
 2174: \+file
 2175: 
 2176: open-dir	( c_addr u -- wdirid wior )	gforth	open_dir
 2177: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
 2178: wior =  IOR(wdirid == 0);
 2179: 
 2180: read-dir	( c_addr u1 wdirid -- u2 flag wior )	gforth	read_dir
 2181: struct dirent * dent;
 2182: dent = readdir((DIR *)wdirid);
 2183: wior = 0;
 2184: flag = -1;
 2185: if(dent == NULL) {
 2186:   u2 = 0;
 2187:   flag = 0;
 2188: } else {
 2189:   u2 = strlen(dent->d_name);
 2190:   if(u2 > u1) {
 2191:     u2 = u1;
 2192:     wior = -512-ENAMETOOLONG;
 2193:   }
 2194:   memmove(c_addr, dent->d_name, u2);
 2195: }
 2196: 
 2197: close-dir	( wdirid -- wior )	gforth	close_dir
 2198: wior = IOR(closedir((DIR *)wdirid));
 2199: 
 2200: filename-match	( c_addr1 u1 c_addr2 u2 -- flag )	gforth	match_file
 2201: char * string = cstr(c_addr1, u1, 1);
 2202: char * pattern = cstr(c_addr2, u2, 0);
 2203: flag = FLAG(!fnmatch(pattern, string, 0));
 2204: 
 2205: \+
 2206: 
 2207: newline	( -- c_addr u )	gforth
 2208: ""String containing the newline sequence of the host OS""
 2209: char newline[] = {
 2210: #if defined(unix) || defined(__MACH__)
 2211: /* Darwin/MacOS X sets __MACH__, but not unix. */
 2212: '\n'
 2213: #else
 2214: '\r','\n'
 2215: #endif
 2216: };
 2217: c_addr=newline;
 2218: u=sizeof(newline);
 2219: :
 2220:  "newline count ;
 2221: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
 2222: 
 2223: \+os
 2224: 
 2225: utime	( -- dtime )	gforth
 2226: ""Report the current time in microseconds since some epoch.""
 2227: struct timeval time1;
 2228: gettimeofday(&time1,NULL);
 2229: dtime = timeval2us(&time1);
 2230: 
 2231: cputime ( -- duser dsystem ) gforth
 2232: ""duser and dsystem are the respective user- and system-level CPU
 2233: times used since the start of the Forth system (excluding child
 2234: processes), in microseconds (the granularity may be much larger,
 2235: however).  On platforms without the getrusage call, it reports elapsed
 2236: time (since some epoch) for duser and 0 for dsystem.""
 2237: #ifdef HAVE_GETRUSAGE
 2238: struct rusage usage;
 2239: getrusage(RUSAGE_SELF, &usage);
 2240: duser = timeval2us(&usage.ru_utime);
 2241: dsystem = timeval2us(&usage.ru_stime);
 2242: #else
 2243: struct timeval time1;
 2244: gettimeofday(&time1,NULL);
 2245: duser = timeval2us(&time1);
 2246: #ifndef BUGGY_LONG_LONG
 2247: dsystem = (DCell)0;
 2248: #else
 2249: dsystem=(DCell){0,0};
 2250: #endif
 2251: #endif
 2252: 
 2253: \+
 2254: 
 2255: \+floating
 2256: 
 2257: v*	( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
 2258: ""dot-product: r=v1*v2.  The first element of v1 is at f_addr1, the
 2259: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
 2260: ucount elements.""
 2261: for (r=0.; ucount>0; ucount--) {
 2262:   r += *f_addr1 * *f_addr2;
 2263:   f_addr1 = (Float *)(((Address)f_addr1)+nstride1);
 2264:   f_addr2 = (Float *)(((Address)f_addr2)+nstride2);
 2265: }
 2266: :
 2267:  >r swap 2swap swap 0e r> 0 ?DO
 2268:      dup f@ over + 2swap dup f@ f* f+ over + 2swap
 2269:  LOOP 2drop 2drop ; 
 2270: 
 2271: faxpy	( ra f_x nstridex f_y nstridey ucount -- )	gforth
 2272: ""vy=ra*vx+vy""
 2273: for (; ucount>0; ucount--) {
 2274:   *f_y += ra * *f_x;
 2275:   f_x = (Float *)(((Address)f_x)+nstridex);
 2276:   f_y = (Float *)(((Address)f_y)+nstridey);
 2277: }
 2278: :
 2279:  >r swap 2swap swap r> 0 ?DO
 2280:      fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
 2281:  LOOP 2drop 2drop fdrop ;
 2282: 
 2283: \+
 2284: 
 2285: \+file
 2286: 
 2287: (read-line)	( c_addr u1 wfileid -- u2 flag u3 wior )	file	paren_read_line
 2288: Cell c;
 2289: flag=-1;
 2290: u3=0;
 2291: for(u2=0; u2<u1; u2++)
 2292: {
 2293:    c = getc((FILE *)wfileid);
 2294:    u3++;
 2295:    if (c=='\n') break;
 2296:    if (c=='\r') {
 2297:      if ((c = getc((FILE *)wfileid))!='\n')
 2298:        ungetc(c,(FILE *)wfileid);
 2299:      else
 2300:        u3++;
 2301:      break;
 2302:    }
 2303:    if (c==EOF) {
 2304: 	flag=FLAG(u2!=0);
 2305: 	break;
 2306:      }
 2307:    c_addr[u2] = (Char)c;
 2308: }
 2309: wior=FILEIO(ferror((FILE *)wfileid));
 2310: 
 2311: \+
 2312: 
 2313: (listlfind)	( c_addr u longname1 -- longname2 )	new	paren_listlfind
 2314: for (; longname1 != NULL; longname1 = (struct Longname *)(longname1->next))
 2315:   if ((UCell)LONGNAME_COUNT(longname1)==u &&
 2316:       memcasecmp(c_addr, longname1->name, u)== 0 /* or inline? */)
 2317:     break;
 2318: longname2=longname1;
 2319: :
 2320:     BEGIN  dup WHILE  (findl-samelen)  dup  WHILE
 2321: 	>r 2dup r@ cell+ cell+ capscomp  0=
 2322: 	IF  2drop r>  EXIT  THEN
 2323: 	r> @
 2324:     REPEAT  THEN  nip nip ;
 2325: : (findl-samelen) ( u longname1 -- u longname2/0 )
 2326:     BEGIN  2dup cell+ @ lcount-mask and <> WHILE  @  dup 0= UNTIL  THEN ;
 2327: 
 2328: \+hash
 2329: 
 2330: (hashlfind)	( c_addr u a_addr -- longname2 )	new	paren_hashlfind
 2331: struct Longname *longname1;
 2332: longname2=NULL;
 2333: while(a_addr != NULL)
 2334: {
 2335:    longname1=(struct Longname *)(a_addr[1]);
 2336:    a_addr=(Cell *)(a_addr[0]);
 2337:    if ((UCell)LONGNAME_COUNT(longname1)==u &&
 2338:        memcasecmp(c_addr, longname1->name, u)== 0 /* or inline? */)
 2339:      {
 2340: 	longname2=longname1;
 2341: 	break;
 2342:      }
 2343: }
 2344: :
 2345:  BEGIN  dup  WHILE
 2346:         2@ >r >r dup r@ cell+ @ lcount-mask and =
 2347:         IF  2dup r@ cell+ cell+ capscomp 0=
 2348: 	    IF  2drop r> rdrop  EXIT  THEN  THEN
 2349: 	rdrop r>
 2350:  REPEAT nip nip ;
 2351: 
 2352: (tablelfind)	( c_addr u a_addr -- longname2 )	new	paren_tablelfind
 2353: ""A case-sensitive variant of @code{(hashfind)}""
 2354: struct Longname *longname1;
 2355: longname2=NULL;
 2356: while(a_addr != NULL)
 2357: {
 2358:    longname1=(struct Longname *)(a_addr[1]);
 2359:    a_addr=(Cell *)(a_addr[0]);
 2360:    if ((UCell)LONGNAME_COUNT(longname1)==u &&
 2361:        memcmp(c_addr, longname1->name, u)== 0 /* or inline? */)
 2362:      {
 2363: 	longname2=longname1;
 2364: 	break;
 2365:      }
 2366: }
 2367: :
 2368:  BEGIN  dup  WHILE
 2369:         2@ >r >r dup r@ cell+ @ lcount-mask and =
 2370:         IF  2dup r@ cell+ cell+ -text 0=
 2371: 	    IF  2drop r> rdrop  EXIT  THEN  THEN
 2372: 	rdrop r>
 2373:  REPEAT nip nip ;
 2374: 
 2375: \+
 2376: 
 2377: \+peephole
 2378: 
 2379: \g peephole
 2380: 
 2381: primtable	( -- wprimtable )	new
 2382: ""wprimtable is a table containing the xts of the primitives indexed
 2383: by sequence-number in prim (for use in prepare-peephole-table).""
 2384: wprimtable = (Cell)primtable(symbols+DOESJUMP+1,MAX_SYMBOLS-DOESJUMP-1);
 2385: 
 2386: prepare-peephole-table	( wprimtable -- wpeeptable ) new prepare_peephole_opt
 2387: ""wpeeptable is a data structure used by @code{peephole-opt}; it is
 2388: constructed by combining a primitives table with a simple peephole
 2389: optimization table.""
 2390: wpeeptable = prepare_peephole_table((Xt *)wprimtable);
 2391: 
 2392: peephole-opt	( xt1 xt2 wpeeptable -- xt )	new	peephole_opt
 2393: ""xt is the combination of xt1 and xt2 (according to wpeeptable); if
 2394: they cannot be combined, xt is 0.""
 2395: xt = peephole_opt(xt1, xt2, wpeeptable);
 2396: 
 2397: call	( #a_callee -- R:a_retaddr )	new
 2398: ""Call callee (a variant of docol with inline argument).""
 2399: #ifdef DEBUG
 2400:     {
 2401:       CFA_TO_NAME((((Cell *)a_callee)-2));
 2402:       fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
 2403: 	      len,name);
 2404:     }
 2405: #endif
 2406: a_retaddr = (Cell *)IP;
 2407: SET_IP((Xt *)a_callee);
 2408: 
 2409: useraddr	( #u -- a_addr )	new
 2410: a_addr = (Cell *)(up+u);
 2411: 
 2412: compile-prim ( xt1 -- xt2 )	new	compile_prim
 2413: xt2 = (Xt)compile_prim((Label)xt1);
 2414: 
 2415: lit@ / lit_fetch = lit @
 2416: 
 2417: lit-perform	( #a_addr -- )	new	lit_perform
 2418: ip=IP;
 2419: SUPER_END;
 2420: EXEC(*(Xt *)a_addr);
 2421: 
 2422: lit+ / lit_plus = lit +
 2423: 
 2424: does-exec ( #a_cfa -- R:nest a_pfa )	new	does_exec
 2425: a_pfa = PFA(a_cfa);
 2426: nest = (Cell)ip;
 2427: IF_spTOS(spTOS = sp[0]);
 2428: #ifdef DEBUG
 2429:     {
 2430:       CFA_TO_NAME(a_cfa);
 2431:       fprintf(stderr,"%08lx: does %08lx %.*s\n",
 2432: 	      (Cell)ip,(Cell)a_cfa,len,name);
 2433:     }
 2434: #endif
 2435: SET_IP(DOES_CODE1(a_cfa));
 2436: 
 2437: include(peeprules.vmg)
 2438: 
 2439: \+

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