[gforth] / gforth / prim

gforth: gforth/prim

1 :	anton	1.1	\ Gforth primitives
2 :
3 :	anton	1.126	\ Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc.
4 :	anton	1.1
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 :	anton	1.63	\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20 :	anton	1.1
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 :	anton	1.47	\ forth name ( stack effect ) category [pronunciation]
30 :	anton	1.1	\ [""glossary entry""]
31 :			\ C code
32 :			\ [:
33 :			\ Forth code]
34 :			\
35 :	anton	1.47	\ Note: Fields in brackets are optional. Word specifications have to
36 :			\ be separated by at least one empty line
37 :	anton	1.1	\
38 :			\ Both pronounciation and stack items (in the stack effect) must
39 :	anton	1.48	\ 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 :	anton	1.1	\
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 :	anton	1.93	\
57 :			\ For superinstructions the syntax is:
58 :			\
59 :			\ forth-name [/ c-name] = forth-name forth-name ...
60 :			\
61 :	anton	1.1	\
62 :			\ The stack variables have the following types:
63 :			\
64 :			\ name matches type
65 :			\ f.* Bool
66 :			\ c.* Char
67 :	anton	1.93	\ [nw].* Cell
68 :	anton	1.1	\ 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 :	anton	1.67
80 :	anton	1.79	\E stack data-stack sp Cell
81 :			\E stack fp-stack fp Float
82 :			\E stack return-stack rp Cell
83 :			\E
84 :	anton	1.67	\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 :	anton	1.71	\E s" struct Longname *" single data-stack type-prefix longname
102 :	anton	1.67	\E
103 :			\E return-stack stack-prefix R:
104 :			\E inst-stream stack-prefix #
105 :			\E
106 :			\E set-current
107 :	anton	1.97	\E store-optimization on
108 :	anton	1.109	\E ' noop tail-nextp2 ! \ now INST_TAIL just stores, but does not jump
109 :	anton	1.128	\E
110 :			\E include-skipped-insts on \ static superinsts include cells for components
111 :			\E \ useful for dynamic programming and
112 :			\E \ superinsts across entry points
113 :	anton	1.67
114 :	anton	1.1	\
115 :			\
116 :			\
117 :			\ In addition the following names can be used:
118 :			\ ip the instruction pointer
119 :			\ sp the data stack pointer
120 :			\ rp the parameter stack pointer
121 :			\ lp the locals stack pointer
122 :			\ NEXT executes NEXT
123 :			\ cfa
124 :			\ NEXT1 executes NEXT1
125 :			\ FLAG(x) makes a Forth flag from a C flag
126 :			\
127 :			\
128 :			\
129 :			\ Percentages in comments are from Koopmans book: average/maximum use
130 :			\ (taken from four, not very representative benchmarks)
131 :			\
132 :			\
133 :			\
134 :			\ To do:
135 :			\
136 :			\ throw execute, cfa and NEXT1 out?
137 :			\ macroize ip, ip++, ip++ (pipelining)?
138 :
139 :			\ these m4 macros would collide with identifiers
140 :			undefine(`index')
141 :			undefine(`shift')
142 :	pazsan	1.78	undefine(`symbols')
143 :	anton	1.1
144 :	pazsan	1.83	\g control
145 :
146 :	anton	1.47	noop ( -- ) gforth
147 :	anton	1.1	:
148 :			;
149 :
150 :	pazsan	1.112	call ( #a_callee -- R:a_retaddr ) new
151 :			""Call callee (a variant of docol with inline argument).""
152 :			#ifdef NO_IP
153 :			INST_TAIL;
154 :			JUMP(a_callee);
155 :			#else
156 :			#ifdef DEBUG
157 :			{
158 :			CFA_TO_NAME((((Cell *)a_callee)-2));
159 :			fprintf(stderr,"%08lx: call %08lx %.*s\n",(Cell)ip,(Cell)a_callee,
160 :			len,name);
161 :			}
162 :			#endif
163 :			a_retaddr = (Cell *)IP;
164 :			SET_IP((Xt *)a_callee);
165 :			#endif
166 :	anton	1.1
167 :	anton	1.47	execute ( xt -- ) core
168 :	crook	1.29	""Perform the semantics represented by the execution token, @i{xt}.""
169 :	anton	1.102	#ifndef NO_IP
170 :	anton	1.1	ip=IP;
171 :	anton	1.102	#endif
172 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
173 :	anton	1.76	SUPER_END;
174 :	anton	1.1	EXEC(xt);
175 :
176 :	anton	1.47	perform ( a_addr -- ) gforth
177 :	anton	1.55	""@code{@@ execute}.""
178 :	anton	1.1	/* and pfe */
179 :	anton	1.102	#ifndef NO_IP
180 :	anton	1.1	ip=IP;
181 :	anton	1.102	#endif
182 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
183 :	anton	1.76	SUPER_END;
184 :	anton	1.1	EXEC((Xt )a_addr);
185 :			:
186 :			@ execute ;
187 :
188 :	pazsan	1.112	;s ( R:w -- ) gforth semis
189 :			""The primitive compiled by @code{EXIT}.""
190 :			#ifdef NO_IP
191 :			INST_TAIL;
192 :			goto (void )w;
193 :			#else
194 :			SET_IP((Xt *)w);
195 :			#endif
196 :
197 :			unloop ( R:w1 R:w2 -- ) core
198 :			/* !! alias for 2rdrop */
199 :			:
200 :			r> rdrop rdrop >r ;
201 :
202 :			lit-perform ( #a_addr -- ) new lit_perform
203 :			#ifndef NO_IP
204 :			ip=IP;
205 :			#endif
206 :			SUPER_END;
207 :			EXEC((Xt )a_addr);
208 :
209 :			does-exec ( #a_cfa -- R:nest a_pfa ) new does_exec
210 :			#ifdef NO_IP
211 :			/* compiled to LIT CALL by compile_prim */
212 :			assert(0);
213 :			#else
214 :			a_pfa = PFA(a_cfa);
215 :			nest = (Cell)IP;
216 :			IF_spTOS(spTOS = sp[0]);
217 :			#ifdef DEBUG
218 :			{
219 :			CFA_TO_NAME(a_cfa);
220 :			fprintf(stderr,"%08lx: does %08lx %.*s\n",
221 :			(Cell)ip,(Cell)a_cfa,len,name);
222 :			}
223 :			#endif
224 :			SET_IP(DOES_CODE1(a_cfa));
225 :			#endif
226 :
227 :	pazsan	1.15	\+glocals
228 :	anton	1.1
229 :	pazsan	1.112	branch-lp+!# ( #a_target #nlocals -- ) gforth branch_lp_plus_store_number
230 :	anton	1.1	/* this will probably not be used */
231 :	anton	1.68	lp += nlocals;
232 :	pazsan	1.112	#ifdef NO_IP
233 :			INST_TAIL;
234 :			JUMP(a_target);
235 :			#else
236 :			SET_IP((Xt *)a_target);
237 :			#endif
238 :	anton	1.1
239 :	pazsan	1.15	\+
240 :	anton	1.1
241 :	pazsan	1.112	branch ( #a_target -- ) gforth
242 :			#ifdef NO_IP
243 :			INST_TAIL;
244 :			JUMP(a_target);
245 :			#else
246 :			SET_IP((Xt *)a_target);
247 :			#endif
248 :	anton	1.1	:
249 :	pazsan	1.112	r> @ >r ;
250 :	anton	1.1
251 :	pazsan	1.112	\ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
252 :	anton	1.1	\ this is non-syntactical: code must open a brace that is closed by the macro
253 :			define(condbranch,
254 :	pazsan	1.112	$1 ( `#'a_target $2 ) $3
255 :			$4 #ifdef NO_IP
256 :	anton	1.96	INST_TAIL;
257 :	pazsan	1.112	#endif
258 :			$5 #ifdef NO_IP
259 :			JUMP(a_target);
260 :			#else
261 :			SET_IP((Xt *)a_target);
262 :			INST_TAIL; NEXT_P2;
263 :			#endif
264 :	anton	1.1	}
265 :	anton	1.87	SUPER_CONTINUE;
266 :	pazsan	1.112	$6
267 :	anton	1.1
268 :	pazsan	1.15	\+glocals
269 :	anton	1.1
270 :	pazsan	1.112	$1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
271 :			$4 #ifdef NO_IP
272 :	anton	1.96	INST_TAIL;
273 :	pazsan	1.112	#endif
274 :			$5 lp += nlocals;
275 :			#ifdef NO_IP
276 :			JUMP(a_target);
277 :			#else
278 :			SET_IP((Xt *)a_target);
279 :			INST_TAIL; NEXT_P2;
280 :			#endif
281 :	anton	1.1	}
282 :	anton	1.87	SUPER_CONTINUE;
283 :	anton	1.1
284 :	pazsan	1.15	\+
285 :	anton	1.1	)
286 :
287 :	anton	1.68	condbranch(?branch,f --,f83 question_branch,
288 :	pazsan	1.112	,if (f==0) {
289 :	jwilke	1.5	,:
290 :	pazsan	1.112	0= dup 0= \ !f f
291 :			r> tuck cell+ \ !f branchoffset f IP+
292 :			and -rot @ and or \ f&IP+\|!f&branch
293 :	jwilke	1.5	>r ;)
294 :	anton	1.1
295 :			\ we don't need an lp_plus_store version of the ?dup-stuff, because it
296 :			\ is only used in if's (yet)
297 :
298 :	pazsan	1.15	\+xconds
299 :	anton	1.1
300 :	pazsan	1.112	?dup-?branch ( #a_target f -- f ) new question_dupe_question_branch
301 :	anton	1.1	""The run-time procedure compiled by @code{?DUP-IF}.""
302 :			if (f==0) {
303 :			sp++;
304 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
305 :	pazsan	1.112	#ifdef NO_IP
306 :			INST_TAIL;
307 :			JUMP(a_target);
308 :			#else
309 :			SET_IP((Xt *)a_target);
310 :			INST_TAIL; NEXT_P2;
311 :			#endif
312 :	anton	1.1	}
313 :	anton	1.87	SUPER_CONTINUE;
314 :	anton	1.1
315 :	pazsan	1.112	?dup-0=-?branch ( #a_target f -- ) new question_dupe_zero_equals_question_branch
316 :	anton	1.1	""The run-time procedure compiled by @code{?DUP-0=-IF}.""
317 :			/* the approach taken here of declaring the word as having the stack
318 :			effect ( f -- ) and correcting for it in the branch-taken case costs a
319 :			few cycles in that case, but is easy to convert to a CONDBRANCH
320 :			invocation */
321 :			if (f!=0) {
322 :			sp--;
323 :	pazsan	1.112	#ifdef NO_IP
324 :			JUMP(a_target);
325 :			#else
326 :			SET_IP((Xt *)a_target);
327 :	anton	1.1	NEXT;
328 :	pazsan	1.112	#endif
329 :	anton	1.1	}
330 :	anton	1.87	SUPER_CONTINUE;
331 :	anton	1.1
332 :	pazsan	1.15	\+
333 :	jwilke	1.31	\fhas? skiploopprims 0= [IF]
334 :	anton	1.1
335 :	anton	1.68	condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
336 :	anton	1.65	n2=n1-1;
337 :	pazsan	1.112	,if (n1) {
338 :	anton	1.1	,:
339 :			r> r> dup 1- >r
340 :	pazsan	1.112	IF @ >r ELSE cell+ >r THEN ;)
341 :	anton	1.1
342 :	anton	1.68	condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_loop,
343 :	anton	1.65	n2=n1+1;
344 :	pazsan	1.112	,if (n2 != nlimit) {
345 :	anton	1.1	,:
346 :			r> r> 1+ r> 2dup =
347 :			IF >r 1- >r cell+ >r
348 :	pazsan	1.112	ELSE >r >r @ >r THEN ;)
349 :	anton	1.1
350 :	anton	1.68	condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
351 :	anton	1.1	/* !! check this thoroughly */
352 :			/* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
353 :			/* dependent upon two's complement arithmetic */
354 :	anton	1.65	Cell olddiff = n1-nlimit;
355 :			n2=n1+n;
356 :	pazsan	1.112	,if ((olddiff^(olddiff+n))>=0 /* the limit is not crossed */
357 :	anton	1.1	\|\| (olddiff^n)>=0 /* it is a wrap-around effect */) {
358 :			,:
359 :			r> swap
360 :			r> r> 2dup - >r
361 :			2 pick r@ + r@ xor 0< 0=
362 :			3 pick r> xor 0< 0= or
363 :	pazsan	1.112	IF >r + >r @ >r
364 :	anton	1.1	ELSE >r >r drop cell+ >r THEN ;)
365 :
366 :	pazsan	1.15	\+xconds
367 :	anton	1.1
368 :	anton	1.68	condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
369 :	anton	1.65	UCell olddiff = n1-nlimit;
370 :			n2=n1-u;
371 :	pazsan	1.112	,if (olddiff>u) {
372 :	anton	1.1	,)
373 :
374 :	anton	1.68	condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_symmetric_plus_loop,
375 :	anton	1.1	""The run-time procedure compiled by S+LOOP. It loops until the index
376 :			crosses the boundary between limit and limit-sign(n). I.e. a symmetric
377 :			version of (+LOOP).""
378 :			/* !! check this thoroughly */
379 :	anton	1.65	Cell diff = n1-nlimit;
380 :	anton	1.1	Cell newdiff = diff+n;
381 :			if (n<0) {
382 :			diff = -diff;
383 :			newdiff = -newdiff;
384 :			}
385 :	anton	1.65	n2=n1+n;
386 :	pazsan	1.112	,if (diff>=0 \|\| newdiff<0) {
387 :	anton	1.1	,)
388 :
389 :	pazsan	1.15	\+
390 :	anton	1.1
391 :	pazsan	1.112	(for) ( ncount -- R:nlimit R:ncount ) cmFORTH paren_for
392 :	anton	1.1	/* or (for) = >r -- collides with unloop! */
393 :	anton	1.65	nlimit=0;
394 :	anton	1.1	:
395 :			r> swap 0 >r >r >r ;
396 :
397 :	pazsan	1.112	(do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_do
398 :	anton	1.1	:
399 :			r> swap rot >r >r >r ;
400 :
401 :	pazsan	1.112	(?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_question_do
402 :			#ifdef NO_IP
403 :			INST_TAIL;
404 :			#endif
405 :	anton	1.1	if (nstart == nlimit) {
406 :	pazsan	1.112	#ifdef NO_IP
407 :			JUMP(a_target);
408 :			#else
409 :			SET_IP((Xt *)a_target);
410 :			INST_TAIL; NEXT_P2;
411 :			#endif
412 :	anton	1.1	}
413 :	anton	1.87	SUPER_CONTINUE;
414 :	anton	1.1	:
415 :			2dup =
416 :			IF r> swap rot >r >r
417 :	pazsan	1.112	@ >r
418 :	anton	1.1	ELSE r> swap rot >r >r
419 :			cell+ >r
420 :			THEN ; \ --> CORE-EXT
421 :
422 :	pazsan	1.15	\+xconds
423 :	anton	1.1
424 :	pazsan	1.112	(+do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
425 :			#ifdef NO_IP
426 :			INST_TAIL;
427 :			#endif
428 :	anton	1.1	if (nstart >= nlimit) {
429 :	pazsan	1.112	#ifdef NO_IP
430 :			JUMP(a_target);
431 :			#else
432 :			SET_IP((Xt *)a_target);
433 :			INST_TAIL; NEXT_P2;
434 :			#endif
435 :	anton	1.1	}
436 :	anton	1.87	SUPER_CONTINUE;
437 :	anton	1.1	:
438 :			swap 2dup
439 :			r> swap >r swap >r
440 :			>=
441 :			IF
442 :	pazsan	1.112	@
443 :	anton	1.1	ELSE
444 :			cell+
445 :			THEN >r ;
446 :
447 :	pazsan	1.112	(u+do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
448 :			#ifdef NO_IP
449 :			INST_TAIL;
450 :			#endif
451 :	anton	1.1	if (ustart >= ulimit) {
452 :	pazsan	1.112	#ifdef NO_IP
453 :			JUMP(a_target);
454 :			#else
455 :			SET_IP((Xt *)a_target);
456 :			INST_TAIL; NEXT_P2;
457 :			#endif
458 :	anton	1.1	}
459 :	anton	1.87	SUPER_CONTINUE;
460 :	anton	1.1	:
461 :			swap 2dup
462 :			r> swap >r swap >r
463 :			u>=
464 :			IF
465 :	pazsan	1.112	@
466 :	anton	1.1	ELSE
467 :			cell+
468 :			THEN >r ;
469 :
470 :	pazsan	1.112	(-do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
471 :			#ifdef NO_IP
472 :			INST_TAIL;
473 :			#endif
474 :	anton	1.1	if (nstart <= nlimit) {
475 :	pazsan	1.112	#ifdef NO_IP
476 :			JUMP(a_target);
477 :			#else
478 :			SET_IP((Xt *)a_target);
479 :			INST_TAIL; NEXT_P2;
480 :			#endif
481 :	anton	1.1	}
482 :	anton	1.87	SUPER_CONTINUE;
483 :	anton	1.1	:
484 :			swap 2dup
485 :			r> swap >r swap >r
486 :			<=
487 :			IF
488 :	pazsan	1.112	@
489 :	anton	1.1	ELSE
490 :			cell+
491 :			THEN >r ;
492 :
493 :	pazsan	1.112	(u-do) ( #a_target ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
494 :			#ifdef NO_IP
495 :			INST_TAIL;
496 :			#endif
497 :	anton	1.1	if (ustart <= ulimit) {
498 :	pazsan	1.112	#ifdef NO_IP
499 :			JUMP(a_target);
500 :			#else
501 :			SET_IP((Xt *)a_target);
502 :			INST_TAIL; NEXT_P2;
503 :			#endif
504 :	anton	1.1	}
505 :	anton	1.87	SUPER_CONTINUE;
506 :	anton	1.1	:
507 :			swap 2dup
508 :			r> swap >r swap >r
509 :			u<=
510 :			IF
511 :	pazsan	1.112	@
512 :	anton	1.1	ELSE
513 :			cell+
514 :			THEN >r ;
515 :
516 :	pazsan	1.15	\+
517 :	anton	1.1
518 :	jwilke	1.5	\ don't make any assumptions where the return stack is!!
519 :			\ implement this in machine code if it should run quickly!
520 :
521 :	anton	1.65	i ( R:n -- R:n n ) core
522 :	anton	1.1	:
523 :	jwilke	1.5	\ rp@ cell+ @ ;
524 :			r> r> tuck >r >r ;
525 :	anton	1.1
526 :	anton	1.65	i' ( R:w R:w2 -- R:w R:w2 w ) gforth i_tick
527 :	anton	1.1	:
528 :	jwilke	1.5	\ rp@ cell+ cell+ @ ;
529 :			r> r> r> dup itmp ! >r >r >r itmp @ ;
530 :			variable itmp
531 :	anton	1.1
532 :	anton	1.65	j ( R:n R:d1 -- n R:n R:d1 ) core
533 :	anton	1.1	:
534 :	jwilke	1.5	\ rp@ cell+ cell+ cell+ @ ;
535 :			r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
536 :			[IFUNDEF] itmp variable itmp [THEN]
537 :	anton	1.1
538 :	anton	1.65	k ( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 ) gforth
539 :	anton	1.1	:
540 :	jwilke	1.5	\ rp@ [ 5 cells ] Literal + @ ;
541 :			r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
542 :			[IFUNDEF] itmp variable itmp [THEN]
543 :	jwilke	1.31
544 :			\f[THEN]
545 :	anton	1.1
546 :			\ digit is high-level: 0/0%
547 :
548 :	pazsan	1.83	\g strings
549 :
550 :	anton	1.47	move ( c_from c_to ucount -- ) core
551 :	anton	1.52	""Copy the contents of @i{ucount} aus at @i{c-from} to
552 :	anton	1.33	@i{c-to}. @code{move} works correctly even if the two areas overlap.""
553 :	anton	1.52	/* !! note that the standard specifies addr, not c-addr */
554 :	anton	1.1	memmove(c_to,c_from,ucount);
555 :			/* make an Ifdef for bsd and others? */
556 :			:
557 :			>r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
558 :
559 :	anton	1.47	cmove ( c_from c_to u -- ) string c_move
560 :	anton	1.33	""Copy the contents of @i{ucount} characters from data space at
561 :			@i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
562 :			from low address to high address; i.e., for overlapping areas it is
563 :			safe if @i{c-to}=<@i{c-from}.""
564 :	anton	1.125	cmove(c_from,c_to,u);
565 :	anton	1.1	:
566 :			bounds ?DO dup c@ I c! 1+ LOOP drop ;
567 :
568 :	anton	1.47	cmove> ( c_from c_to u -- ) string c_move_up
569 :	anton	1.33	""Copy the contents of @i{ucount} characters from data space at
570 :			@i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
571 :			from high address to low address; i.e., for overlapping areas it is
572 :			safe if @i{c-to}>=@i{c-from}.""
573 :	anton	1.125	cmove_up(c_from,c_to,u);
574 :	anton	1.1	:
575 :			dup 0= IF drop 2drop exit THEN
576 :			rot over + -rot bounds swap 1-
577 :			DO 1- dup c@ I c! -1 +LOOP drop ;
578 :
579 :	anton	1.47	fill ( c_addr u c -- ) core
580 :	anton	1.52	""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
581 :	anton	1.1	memset(c_addr,c,u);
582 :			:
583 :			-rot bounds
584 :			?DO dup I c! LOOP drop ;
585 :
586 :	anton	1.47	compare ( c_addr1 u1 c_addr2 u2 -- n ) string
587 :	crook	1.29	""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
588 :			the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
589 :	anton	1.1	is 1. Currently this is based on the machine's character
590 :	crook	1.26	comparison. In the future, this may change to consider the current
591 :	anton	1.1	locale and its collation order.""
592 :	pazsan	1.46	/* close ' to keep fontify happy */
593 :	anton	1.125	n = compare(c_addr1, u1, c_addr2, u2);
594 :	anton	1.1	:
595 :	pazsan	1.43	rot 2dup swap - >r min swap -text dup
596 :			IF rdrop ELSE drop r> sgn THEN ;
597 :			: sgn ( n -- -1/0/1 )
598 :			dup 0= IF EXIT THEN 0< 2* 1+ ;
599 :	anton	1.1
600 :	anton	1.125	\ -text is only used by replaced primitives now; move it elsewhere
601 :			\ -text ( c_addr1 u c_addr2 -- n ) new dash_text
602 :			\ n = memcmp(c_addr1, c_addr2, u);
603 :			\ if (n<0)
604 :			\ n = -1;
605 :			\ else if (n>0)
606 :			\ n = 1;
607 :			\ :
608 :			\ swap bounds
609 :			\ ?DO dup c@ I c@ = WHILE 1+ LOOP drop 0
610 :			\ ELSE c@ I c@ - unloop THEN sgn ;
611 :			\ : sgn ( n -- -1/0/1 )
612 :			\ dup 0= IF EXIT THEN 0< 2* 1+ ;
613 :	anton	1.1
614 :	anton	1.47	toupper ( c1 -- c2 ) gforth
615 :	crook	1.29	""If @i{c1} is a lower-case character (in the current locale), @i{c2}
616 :	anton	1.25	is the equivalent upper-case character. All other characters are unchanged.""
617 :	anton	1.1	c2 = toupper(c1);
618 :			:
619 :			dup [char] a - [ char z char a - 1 + ] Literal u< bl and - ;
620 :
621 :	anton	1.47	/string ( c_addr1 u1 n -- c_addr2 u2 ) string slash_string
622 :	crook	1.29	""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
623 :	crook	1.27	characters from the start of the string.""
624 :	anton	1.1	c_addr2 = c_addr1+n;
625 :			u2 = u1-n;
626 :			:
627 :			tuck - >r + r> dup 0< IF - 0 THEN ;
628 :
629 :	pazsan	1.83	\g arith
630 :
631 :	pazsan	1.112	lit ( #w -- w ) gforth
632 :			:
633 :			r> dup @ swap cell+ >r ;
634 :
635 :	anton	1.47	+ ( n1 n2 -- n ) core plus
636 :	anton	1.1	n = n1+n2;
637 :
638 :	pazsan	1.112	\ lit+ / lit_plus = lit +
639 :
640 :			lit+ ( n1 #n2 -- n ) new lit_plus
641 :			n=n1+n2;
642 :
643 :	anton	1.1	\ PFE-0.9.14 has it differently, but the next release will have it as follows
644 :	anton	1.47	under+ ( n1 n2 n3 -- n n2 ) gforth under_plus
645 :	crook	1.29	""add @i{n3} to @i{n1} (giving @i{n})""
646 :	anton	1.1	n = n1+n3;
647 :			:
648 :			rot + swap ;
649 :
650 :	anton	1.47	- ( n1 n2 -- n ) core minus
651 :	anton	1.1	n = n1-n2;
652 :			:
653 :			negate + ;
654 :
655 :	anton	1.47	negate ( n1 -- n2 ) core
656 :	anton	1.1	/* use minus as alias */
657 :			n2 = -n1;
658 :			:
659 :			invert 1+ ;
660 :
661 :	anton	1.47	1+ ( n1 -- n2 ) core one_plus
662 :	anton	1.1	n2 = n1+1;
663 :			:
664 :			1 + ;
665 :
666 :	anton	1.47	1- ( n1 -- n2 ) core one_minus
667 :	anton	1.1	n2 = n1-1;
668 :			:
669 :			1 - ;
670 :
671 :	anton	1.47	max ( n1 n2 -- n ) core
672 :	anton	1.1	if (n1<n2)
673 :			n = n2;
674 :			else
675 :			n = n1;
676 :			:
677 :			2dup < IF swap THEN drop ;
678 :
679 :	anton	1.47	min ( n1 n2 -- n ) core
680 :	anton	1.1	if (n1<n2)
681 :			n = n1;
682 :			else
683 :			n = n2;
684 :			:
685 :			2dup > IF swap THEN drop ;
686 :
687 :	anton	1.52	abs ( n -- u ) core
688 :			if (n<0)
689 :			u = -n;
690 :	anton	1.1	else
691 :	anton	1.52	u = n;
692 :	anton	1.1	:
693 :			dup 0< IF negate THEN ;
694 :
695 :	anton	1.47	* ( n1 n2 -- n ) core star
696 :	anton	1.1	n = n1*n2;
697 :			:
698 :			um* drop ;
699 :
700 :	anton	1.47	/ ( n1 n2 -- n ) core slash
701 :	anton	1.1	n = n1/n2;
702 :			:
703 :			/mod nip ;
704 :
705 :	anton	1.47	mod ( n1 n2 -- n ) core
706 :	anton	1.1	n = n1%n2;
707 :			:
708 :			/mod drop ;
709 :
710 :	anton	1.47	/mod ( n1 n2 -- n3 n4 ) core slash_mod
711 :	anton	1.1	n4 = n1/n2;
712 :			n3 = n1%n2; /* !! is this correct? look into C standard! */
713 :			:
714 :			>r s>d r> fm/mod ;
715 :
716 :	anton	1.47	2* ( n1 -- n2 ) core two_star
717 :	anton	1.52	""Shift left by 1; also works on unsigned numbers""
718 :	anton	1.1	n2 = 2*n1;
719 :			:
720 :			dup + ;
721 :
722 :	anton	1.47	2/ ( n1 -- n2 ) core two_slash
723 :	anton	1.52	""Arithmetic shift right by 1. For signed numbers this is a floored
724 :			division by 2 (note that @code{/} not necessarily floors).""
725 :	anton	1.1	n2 = n1>>1;
726 :			:
727 :			dup MINI and IF 1 ELSE 0 THEN
728 :			[ bits/byte cell * 1- ] literal
729 :	jwilke	1.5	0 DO 2* swap dup 2* >r MINI and
730 :	anton	1.1	IF 1 ELSE 0 THEN or r> swap
731 :			LOOP nip ;
732 :
733 :	anton	1.47	fm/mod ( d1 n1 -- n2 n3 ) core f_m_slash_mod
734 :	crook	1.29	""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
735 :	anton	1.1	#ifdef BUGGY_LONG_LONG
736 :			DCell r = fmdiv(d1,n1);
737 :			n2=r.hi;
738 :			n3=r.lo;
739 :			#else
740 :			/* assumes that the processor uses either floored or symmetric division */
741 :			n3 = d1/n1;
742 :			n2 = d1%n1;
743 :			/* note that this 1%-3>0 is optimized by the compiler */
744 :			if (1%-3>0 && (d1<0) != (n1<0) && n2!=0) {
745 :			n3--;
746 :			n2+=n1;
747 :			}
748 :			#endif
749 :			:
750 :			dup >r dup 0< IF negate >r dnegate r> THEN
751 :			over 0< IF tuck + swap THEN
752 :			um/mod
753 :			r> 0< IF swap negate swap THEN ;
754 :
755 :	anton	1.47	sm/rem ( d1 n1 -- n2 n3 ) core s_m_slash_rem
756 :	crook	1.29	""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
757 :	anton	1.1	#ifdef BUGGY_LONG_LONG
758 :			DCell r = smdiv(d1,n1);
759 :			n2=r.hi;
760 :			n3=r.lo;
761 :			#else
762 :			/* assumes that the processor uses either floored or symmetric division */
763 :			n3 = d1/n1;
764 :			n2 = d1%n1;
765 :			/* note that this 1%-3<0 is optimized by the compiler */
766 :			if (1%-3<0 && (d1<0) != (n1<0) && n2!=0) {
767 :			n3++;
768 :			n2-=n1;
769 :			}
770 :			#endif
771 :			:
772 :			over >r dup >r abs -rot
773 :			dabs rot um/mod
774 :			r> r@ xor 0< IF negate THEN
775 :			r> 0< IF swap negate swap THEN ;
776 :
777 :	anton	1.47	m* ( n1 n2 -- d ) core m_star
778 :	anton	1.1	#ifdef BUGGY_LONG_LONG
779 :			d = mmul(n1,n2);
780 :			#else
781 :			d = (DCell)n1 * (DCell)n2;
782 :			#endif
783 :			:
784 :			2dup 0< and >r
785 :			2dup swap 0< and >r
786 :			um* r> - r> - ;
787 :
788 :	anton	1.47	um* ( u1 u2 -- ud ) core u_m_star
789 :	anton	1.1	/* use u* as alias */
790 :			#ifdef BUGGY_LONG_LONG
791 :			ud = ummul(u1,u2);
792 :			#else
793 :			ud = (UDCell)u1 * (UDCell)u2;
794 :			#endif
795 :			:
796 :	pazsan	1.137	0 -rot dup [ 8 cells ] literal -
797 :	anton	1.1	DO
798 :	pazsan	1.137	dup 0< I' and d2*+ drop
799 :			LOOP ;
800 :	anton	1.1	: d2*+ ( ud n -- ud+n c )
801 :			over MINI
802 :			and >r >r 2dup d+ swap r> + swap r> ;
803 :
804 :	anton	1.47	um/mod ( ud u1 -- u2 u3 ) core u_m_slash_mod
805 :	anton	1.32	""ud=u3*u1+u2, u1>u2>=0""
806 :	anton	1.1	#ifdef BUGGY_LONG_LONG
807 :			UDCell r = umdiv(ud,u1);
808 :			u2=r.hi;
809 :			u3=r.lo;
810 :			#else
811 :			u3 = ud/u1;
812 :			u2 = ud%u1;
813 :			#endif
814 :			:
815 :			0 swap [ 8 cells 1 + ] literal 0
816 :	jwilke	1.5	?DO /modstep
817 :	anton	1.1	LOOP drop swap 1 rshift or swap ;
818 :			: /modstep ( ud c R: u -- ud-?u c R: u )
819 :	jwilke	1.5	>r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN d2*+ r> ;
820 :	anton	1.1	: d2*+ ( ud n -- ud+n c )
821 :			over MINI
822 :			and >r >r 2dup d+ swap r> + swap r> ;
823 :
824 :	anton	1.47	m+ ( d1 n -- d2 ) double m_plus
825 :	anton	1.1	#ifdef BUGGY_LONG_LONG
826 :			d2.lo = d1.lo+n;
827 :			d2.hi = d1.hi - (n<0) + (d2.lo<d1.lo);
828 :			#else
829 :			d2 = d1+n;
830 :			#endif
831 :			:
832 :			s>d d+ ;
833 :
834 :	anton	1.47	d+ ( d1 d2 -- d ) double d_plus
835 :	anton	1.1	#ifdef BUGGY_LONG_LONG
836 :			d.lo = d1.lo+d2.lo;
837 :			d.hi = d1.hi + d2.hi + (d.lo<d1.lo);
838 :			#else
839 :			d = d1+d2;
840 :			#endif
841 :			:
842 :			rot + >r tuck + swap over u> r> swap - ;
843 :
844 :	anton	1.47	d- ( d1 d2 -- d ) double d_minus
845 :	anton	1.1	#ifdef BUGGY_LONG_LONG
846 :			d.lo = d1.lo - d2.lo;
847 :			d.hi = d1.hi-d2.hi-(d1.lo<d2.lo);
848 :			#else
849 :			d = d1-d2;
850 :			#endif
851 :			:
852 :			dnegate d+ ;
853 :
854 :	anton	1.47	dnegate ( d1 -- d2 ) double d_negate
855 :	anton	1.1	/* use dminus as alias */
856 :			#ifdef BUGGY_LONG_LONG
857 :			d2 = dnegate(d1);
858 :			#else
859 :			d2 = -d1;
860 :			#endif
861 :			:
862 :			invert swap negate tuck 0= - ;
863 :
864 :	anton	1.47	d2* ( d1 -- d2 ) double d_two_star
865 :	anton	1.52	""Shift left by 1; also works on unsigned numbers""
866 :	anton	1.1	#ifdef BUGGY_LONG_LONG
867 :			d2.lo = d1.lo<<1;
868 :			d2.hi = (d1.hi<<1) \| (d1.lo>>(CELL_BITS-1));
869 :			#else
870 :			d2 = 2*d1;
871 :			#endif
872 :			:
873 :			2dup d+ ;
874 :
875 :	anton	1.47	d2/ ( d1 -- d2 ) double d_two_slash
876 :	anton	1.52	""Arithmetic shift right by 1. For signed numbers this is a floored
877 :			division by 2.""
878 :	anton	1.1	#ifdef BUGGY_LONG_LONG
879 :			d2.hi = d1.hi>>1;
880 :			d2.lo= (d1.lo>>1) \| (d1.hi<<(CELL_BITS-1));
881 :			#else
882 :			d2 = d1>>1;
883 :			#endif
884 :			:
885 :			dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
886 :			r> IF [ 1 8 cells 1- lshift ] Literal + THEN swap ;
887 :
888 :	anton	1.47	and ( w1 w2 -- w ) core
889 :	anton	1.1	w = w1&w2;
890 :
891 :	anton	1.47	or ( w1 w2 -- w ) core
892 :	anton	1.1	w = w1\|w2;
893 :			:
894 :			invert swap invert and invert ;
895 :
896 :	anton	1.47	xor ( w1 w2 -- w ) core x_or
897 :	anton	1.1	w = w1^w2;
898 :
899 :	anton	1.47	invert ( w1 -- w2 ) core
900 :	anton	1.1	w2 = ~w1;
901 :			:
902 :			MAXU xor ;
903 :
904 :	anton	1.47	rshift ( u1 n -- u2 ) core r_shift
905 :	anton	1.53	""Logical shift right by @i{n} bits.""
906 :	anton	1.1	u2 = u1>>n;
907 :			:
908 :			0 ?DO 2/ MAXI and LOOP ;
909 :
910 :	anton	1.47	lshift ( u1 n -- u2 ) core l_shift
911 :	anton	1.1	u2 = u1<<n;
912 :			:
913 :			0 ?DO 2* LOOP ;
914 :
915 :	pazsan	1.110	\g compare
916 :
917 :	anton	1.1	\ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
918 :			define(comparisons,
919 :	anton	1.47	$1= ( $2 -- f ) $6 $3equals
920 :	anton	1.1	f = FLAG($4==$5);
921 :			:
922 :			[ char $1x char 0 = [IF]
923 :			] IF false ELSE true THEN [
924 :			[ELSE]
925 :			] xor 0= [
926 :			[THEN] ] ;
927 :
928 :	anton	1.47	$1<> ( $2 -- f ) $7 $3not_equals
929 :	anton	1.1	f = FLAG($4!=$5);
930 :			:
931 :			[ char $1x char 0 = [IF]
932 :			] IF true ELSE false THEN [
933 :			[ELSE]
934 :			] xor 0<> [
935 :			[THEN] ] ;
936 :
937 :	anton	1.47	$1< ( $2 -- f ) $8 $3less_than
938 :	anton	1.1	f = FLAG($4<$5);
939 :			:
940 :			[ char $1x char 0 = [IF]
941 :			] MINI and 0<> [
942 :			[ELSE] char $1x char u = [IF]
943 :			] 2dup xor 0< IF nip ELSE - THEN 0< [
944 :			[ELSE]
945 :			] MINI xor >r MINI xor r> u< [
946 :			[THEN]
947 :			[THEN] ] ;
948 :
949 :	anton	1.47	$1> ( $2 -- f ) $9 $3greater_than
950 :	anton	1.1	f = FLAG($4>$5);
951 :			:
952 :			[ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
953 :			$1< ;
954 :
955 :	anton	1.47	$1<= ( $2 -- f ) gforth $3less_or_equal
956 :	anton	1.1	f = FLAG($4<=$5);
957 :			:
958 :			$1> 0= ;
959 :
960 :	anton	1.47	$1>= ( $2 -- f ) gforth $3greater_or_equal
961 :	anton	1.1	f = FLAG($4>=$5);
962 :			:
963 :			[ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
964 :			$1<= ;
965 :
966 :			)
967 :
968 :			comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
969 :			comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
970 :			comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
971 :
972 :			\ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
973 :			define(dcomparisons,
974 :	anton	1.47	$1= ( $2 -- f ) $6 $3equals
975 :	anton	1.1	#ifdef BUGGY_LONG_LONG
976 :			f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
977 :			#else
978 :			f = FLAG($4==$5);
979 :			#endif
980 :
981 :	anton	1.47	$1<> ( $2 -- f ) $7 $3not_equals
982 :	anton	1.1	#ifdef BUGGY_LONG_LONG
983 :			f = FLAG($4.lo!=$5.lo \|\| $4.hi!=$5.hi);
984 :			#else
985 :			f = FLAG($4!=$5);
986 :			#endif
987 :
988 :	anton	1.47	$1< ( $2 -- f ) $8 $3less_than
989 :	anton	1.1	#ifdef BUGGY_LONG_LONG
990 :			f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
991 :			#else
992 :			f = FLAG($4<$5);
993 :			#endif
994 :
995 :	anton	1.47	$1> ( $2 -- f ) $9 $3greater_than
996 :	anton	1.1	#ifdef BUGGY_LONG_LONG
997 :			f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
998 :			#else
999 :			f = FLAG($4>$5);
1000 :			#endif
1001 :
1002 :	anton	1.47	$1<= ( $2 -- f ) gforth $3less_or_equal
1003 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1004 :			f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
1005 :			#else
1006 :			f = FLAG($4<=$5);
1007 :			#endif
1008 :
1009 :	anton	1.47	$1>= ( $2 -- f ) gforth $3greater_or_equal
1010 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1011 :			f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
1012 :			#else
1013 :			f = FLAG($4>=$5);
1014 :			#endif
1015 :
1016 :			)
1017 :
1018 :	pazsan	1.15	\+dcomps
1019 :	anton	1.1
1020 :			dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
1021 :			dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
1022 :			dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
1023 :
1024 :	pazsan	1.15	\+
1025 :	anton	1.1
1026 :	anton	1.47	within ( u1 u2 u3 -- f ) core-ext
1027 :	anton	1.32	""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2). This works for
1028 :			unsigned and signed numbers (but not a mixture). Another way to think
1029 :			about this word is to consider the numbers as a circle (wrapping
1030 :			around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
1031 :			min-n for signed numbers); now consider the range from u2 towards
1032 :			increasing numbers up to and excluding u3 (giving an empty range if
1033 :	anton	1.52	u2=u3); if u1 is in this range, @code{within} returns true.""
1034 :	anton	1.1	f = FLAG(u1-u2 < u3-u2);
1035 :			:
1036 :			over - >r - r> u< ;
1037 :
1038 :	pazsan	1.112	\g stack
1039 :
1040 :			useraddr ( #u -- a_addr ) new
1041 :			a_addr = (Cell *)(up+u);
1042 :
1043 :			up! ( a_addr -- ) gforth up_store
1044 :			UP=up=(char *)a_addr;
1045 :			:
1046 :			up ! ;
1047 :			Variable UP
1048 :
1049 :	anton	1.47	sp@ ( -- a_addr ) gforth sp_fetch
1050 :	anton	1.1	a_addr = sp+1;
1051 :
1052 :	anton	1.47	sp! ( a_addr -- ) gforth sp_store
1053 :	anton	1.1	sp = a_addr;
1054 :	anton	1.64	/* works with and without spTOS caching */
1055 :	anton	1.1
1056 :	anton	1.47	rp@ ( -- a_addr ) gforth rp_fetch
1057 :	anton	1.1	a_addr = rp;
1058 :
1059 :	anton	1.47	rp! ( a_addr -- ) gforth rp_store
1060 :	anton	1.1	rp = a_addr;
1061 :
1062 :	pazsan	1.15	\+floating
1063 :	anton	1.1
1064 :	anton	1.47	fp@ ( -- f_addr ) gforth fp_fetch
1065 :	anton	1.1	f_addr = fp;
1066 :
1067 :	anton	1.47	fp! ( f_addr -- ) gforth fp_store
1068 :	anton	1.1	fp = f_addr;
1069 :
1070 :	pazsan	1.15	\+
1071 :	anton	1.1
1072 :	anton	1.65	>r ( w -- R:w ) core to_r
1073 :	anton	1.1	:
1074 :			(>r) ;
1075 :			: (>r) rp@ cell+ @ rp@ ! rp@ cell+ ! ;
1076 :
1077 :	anton	1.65	r> ( R:w -- w ) core r_from
1078 :	anton	1.1	:
1079 :			rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
1080 :			Create (rdrop) ' ;s A,
1081 :
1082 :	anton	1.65	rdrop ( R:w -- ) gforth
1083 :	anton	1.1	:
1084 :			r> r> drop >r ;
1085 :
1086 :	pazsan	1.136	2>r ( d -- R:d ) core-ext two_to_r
1087 :	anton	1.1	:
1088 :			swap r> swap >r swap >r >r ;
1089 :
1090 :	pazsan	1.136	2r> ( R:d -- d ) core-ext two_r_from
1091 :	anton	1.1	:
1092 :			r> r> swap r> swap >r swap ;
1093 :
1094 :	pazsan	1.136	2r@ ( R:d -- R:d d ) core-ext two_r_fetch
1095 :	anton	1.1	:
1096 :			i' j ;
1097 :
1098 :	pazsan	1.136	2rdrop ( R:d -- ) gforth two_r_drop
1099 :	anton	1.1	:
1100 :			r> r> drop r> drop >r ;
1101 :
1102 :	anton	1.47	over ( w1 w2 -- w1 w2 w1 ) core
1103 :	anton	1.1	:
1104 :			sp@ cell+ @ ;
1105 :
1106 :	anton	1.47	drop ( w -- ) core
1107 :	anton	1.1	:
1108 :			IF THEN ;
1109 :
1110 :	anton	1.47	swap ( w1 w2 -- w2 w1 ) core
1111 :	anton	1.1	:
1112 :			>r (swap) ! r> (swap) @ ;
1113 :			Variable (swap)
1114 :
1115 :	anton	1.47	dup ( w -- w w ) core dupe
1116 :	anton	1.1	:
1117 :			sp@ @ ;
1118 :
1119 :	anton	1.47	rot ( w1 w2 w3 -- w2 w3 w1 ) core rote
1120 :	anton	1.1	:
1121 :			[ defined? (swap) [IF] ]
1122 :			(swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
1123 :			Variable (rot)
1124 :			[ELSE] ]
1125 :			>r swap r> swap ;
1126 :			[THEN]
1127 :
1128 :	anton	1.47	-rot ( w1 w2 w3 -- w3 w1 w2 ) gforth not_rote
1129 :	anton	1.1	:
1130 :			rot rot ;
1131 :
1132 :	anton	1.47	nip ( w1 w2 -- w2 ) core-ext
1133 :	anton	1.1	:
1134 :	jwilke	1.6	swap drop ;
1135 :	anton	1.1
1136 :	anton	1.47	tuck ( w1 w2 -- w2 w1 w2 ) core-ext
1137 :	anton	1.1	:
1138 :			swap over ;
1139 :
1140 :	anton	1.47	?dup ( w -- w ) core question_dupe
1141 :	anton	1.52	""Actually the stack effect is: @code{( w -- 0 \| w w )}. It performs a
1142 :			@code{dup} if w is nonzero.""
1143 :	anton	1.1	if (w!=0) {
1144 :	anton	1.64	IF_spTOS(*sp-- = w;)
1145 :	anton	1.1	#ifndef USE_TOS
1146 :			*--sp = w;
1147 :			#endif
1148 :			}
1149 :			:
1150 :			dup IF dup THEN ;
1151 :
1152 :	anton	1.47	pick ( u -- w ) core-ext
1153 :	anton	1.52	""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1154 :	anton	1.1	w = sp[u+1];
1155 :			:
1156 :			1+ cells sp@ + @ ;
1157 :
1158 :	anton	1.47	2drop ( w1 w2 -- ) core two_drop
1159 :	anton	1.1	:
1160 :			drop drop ;
1161 :
1162 :	anton	1.47	2dup ( w1 w2 -- w1 w2 w1 w2 ) core two_dupe
1163 :	anton	1.1	:
1164 :			over over ;
1165 :
1166 :	anton	1.47	2over ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 ) core two_over
1167 :	anton	1.1	:
1168 :			3 pick 3 pick ;
1169 :
1170 :	anton	1.47	2swap ( w1 w2 w3 w4 -- w3 w4 w1 w2 ) core two_swap
1171 :	anton	1.1	:
1172 :			rot >r rot r> ;
1173 :
1174 :	anton	1.47	2rot ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 ) double-ext two_rote
1175 :	anton	1.1	:
1176 :			>r >r 2swap r> r> 2swap ;
1177 :
1178 :	anton	1.47	2nip ( w1 w2 w3 w4 -- w3 w4 ) gforth two_nip
1179 :	anton	1.1	:
1180 :			2swap 2drop ;
1181 :
1182 :	anton	1.47	2tuck ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 ) gforth two_tuck
1183 :	anton	1.1	:
1184 :			2swap 2over ;
1185 :
1186 :			\ toggle is high-level: 0.11/0.42%
1187 :
1188 :	pazsan	1.110	\g memory
1189 :
1190 :	anton	1.47	@ ( a_addr -- w ) core fetch
1191 :	anton	1.52	""@i{w} is the cell stored at @i{a_addr}.""
1192 :	anton	1.1	w = *a_addr;
1193 :
1194 :	pazsan	1.112	\ lit@ / lit_fetch = lit @
1195 :
1196 :			lit@ ( #a_addr -- w ) new lit_fetch
1197 :			w = *a_addr;
1198 :
1199 :	anton	1.47	! ( w a_addr -- ) core store
1200 :	anton	1.52	""Store @i{w} into the cell at @i{a-addr}.""
1201 :	anton	1.1	*a_addr = w;
1202 :
1203 :	anton	1.47	+! ( n a_addr -- ) core plus_store
1204 :	anton	1.52	""Add @i{n} to the cell at @i{a-addr}.""
1205 :	anton	1.1	*a_addr += n;
1206 :			:
1207 :			tuck @ + swap ! ;
1208 :
1209 :	anton	1.47	c@ ( c_addr -- c ) core c_fetch
1210 :	anton	1.52	""@i{c} is the char stored at @i{c_addr}.""
1211 :	anton	1.1	c = *c_addr;
1212 :			:
1213 :			[ bigendian [IF] ]
1214 :			[ cell>bit 4 = [IF] ]
1215 :			dup [ 0 cell - ] Literal and @ swap 1 and
1216 :			IF $FF and ELSE 8>> THEN ;
1217 :			[ [ELSE] ]
1218 :			dup [ cell 1- ] literal and
1219 :			tuck - @ swap [ cell 1- ] literal xor
1220 :			0 ?DO 8>> LOOP $FF and
1221 :			[ [THEN] ]
1222 :			[ [ELSE] ]
1223 :			[ cell>bit 4 = [IF] ]
1224 :			dup [ 0 cell - ] Literal and @ swap 1 and
1225 :			IF 8>> ELSE $FF and THEN
1226 :			[ [ELSE] ]
1227 :			dup [ cell 1- ] literal and
1228 :			tuck - @ swap
1229 :			0 ?DO 8>> LOOP 255 and
1230 :			[ [THEN] ]
1231 :			[ [THEN] ]
1232 :			;
1233 :			: 8>> 2/ 2/ 2/ 2/ 2/ 2/ 2/ 2/ ;
1234 :
1235 :	anton	1.47	c! ( c c_addr -- ) core c_store
1236 :	anton	1.52	""Store @i{c} into the char at @i{c-addr}.""
1237 :	anton	1.1	*c_addr = c;
1238 :			:
1239 :			[ bigendian [IF] ]
1240 :			[ cell>bit 4 = [IF] ]
1241 :			tuck 1 and IF $FF and ELSE 8<< THEN >r
1242 :			dup -2 and @ over 1 and cells masks + @ and
1243 :			r> or swap -2 and ! ;
1244 :			Create masks $00FF , $FF00 ,
1245 :			[ELSE] ]
1246 :			dup [ cell 1- ] literal and dup
1247 :			[ cell 1- ] literal xor >r
1248 :			- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
1249 :			rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
1250 :			[THEN]
1251 :			[ELSE] ]
1252 :			[ cell>bit 4 = [IF] ]
1253 :			tuck 1 and IF 8<< ELSE $FF and THEN >r
1254 :			dup -2 and @ over 1 and cells masks + @ and
1255 :			r> or swap -2 and ! ;
1256 :			Create masks $FF00 , $00FF ,
1257 :			[ELSE] ]
1258 :			dup [ cell 1- ] literal and dup >r
1259 :			- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
1260 :			rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
1261 :			[THEN]
1262 :			[THEN]
1263 :			: 8<< 2* 2* 2* 2* 2* 2* 2* 2* ;
1264 :
1265 :	anton	1.47	2! ( w1 w2 a_addr -- ) core two_store
1266 :	anton	1.52	""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1267 :	anton	1.1	a_addr[0] = w2;
1268 :			a_addr[1] = w1;
1269 :			:
1270 :			tuck ! cell+ ! ;
1271 :
1272 :	anton	1.47	2@ ( a_addr -- w1 w2 ) core two_fetch
1273 :	anton	1.52	""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
1274 :			the content of the next cell.""
1275 :	anton	1.1	w2 = a_addr[0];
1276 :			w1 = a_addr[1];
1277 :			:
1278 :			dup cell+ @ swap @ ;
1279 :
1280 :	anton	1.47	cell+ ( a_addr1 -- a_addr2 ) core cell_plus
1281 :	anton	1.52	""@code{1 cells +}""
1282 :	anton	1.1	a_addr2 = a_addr1+1;
1283 :			:
1284 :			cell + ;
1285 :
1286 :	anton	1.47	cells ( n1 -- n2 ) core
1287 :	anton	1.52	"" @i{n2} is the number of address units of @i{n1} cells.""
1288 :	anton	1.1	n2 = n1 * sizeof(Cell);
1289 :			:
1290 :			[ cell
1291 :			2/ dup [IF] ] 2* [ [THEN]
1292 :			2/ dup [IF] ] 2* [ [THEN]
1293 :			2/ dup [IF] ] 2* [ [THEN]
1294 :			2/ dup [IF] ] 2* [ [THEN]
1295 :			drop ] ;
1296 :
1297 :	anton	1.47	char+ ( c_addr1 -- c_addr2 ) core char_plus
1298 :	anton	1.52	""@code{1 chars +}.""
1299 :	anton	1.1	c_addr2 = c_addr1 + 1;
1300 :			:
1301 :			1+ ;
1302 :
1303 :	anton	1.47	(chars) ( n1 -- n2 ) gforth paren_chars
1304 :	anton	1.1	n2 = n1 * sizeof(Char);
1305 :			:
1306 :			;
1307 :
1308 :	anton	1.47	count ( c_addr1 -- c_addr2 u ) core
1309 :	anton	1.56	""@i{c-addr2} is the first character and @i{u} the length of the
1310 :			counted string at @i{c-addr1}.""
1311 :	anton	1.1	u = *c_addr1;
1312 :			c_addr2 = c_addr1+1;
1313 :			:
1314 :			dup 1+ swap c@ ;
1315 :
1316 :	pazsan	1.110	\g compiler
1317 :
1318 :	pazsan	1.112	(listlfind) ( c_addr u longname1 -- longname2 ) new paren_listlfind
1319 :	anton	1.125	longname2=listlfind(c_addr, u, longname1);
1320 :	anton	1.1	:
1321 :	pazsan	1.112	BEGIN dup WHILE (findl-samelen) dup WHILE
1322 :			>r 2dup r@ cell+ cell+ capscomp 0=
1323 :	anton	1.1	IF 2drop r> EXIT THEN
1324 :			r> @
1325 :			REPEAT THEN nip nip ;
1326 :	pazsan	1.112	: (findl-samelen) ( u longname1 -- u longname2/0 )
1327 :			BEGIN 2dup cell+ @ lcount-mask and <> WHILE @ dup 0= UNTIL THEN ;
1328 :	anton	1.1
1329 :	pazsan	1.15	\+hash
1330 :	anton	1.1
1331 :	pazsan	1.112	(hashlfind) ( c_addr u a_addr -- longname2 ) new paren_hashlfind
1332 :	anton	1.125	longname2 = hashlfind(c_addr, u, a_addr);
1333 :	anton	1.1	:
1334 :			BEGIN dup WHILE
1335 :	pazsan	1.112	2@ >r >r dup r@ cell+ @ lcount-mask and =
1336 :			IF 2dup r@ cell+ cell+ capscomp 0=
1337 :	anton	1.1	IF 2drop r> rdrop EXIT THEN THEN
1338 :			rdrop r>
1339 :			REPEAT nip nip ;
1340 :
1341 :	pazsan	1.112	(tablelfind) ( c_addr u a_addr -- longname2 ) new paren_tablelfind
1342 :	anton	1.1	""A case-sensitive variant of @code{(hashfind)}""
1343 :	anton	1.125	longname2 = tablelfind(c_addr, u, a_addr);
1344 :	anton	1.1	:
1345 :			BEGIN dup WHILE
1346 :	pazsan	1.112	2@ >r >r dup r@ cell+ @ lcount-mask and =
1347 :			IF 2dup r@ cell+ cell+ -text 0=
1348 :	anton	1.1	IF 2drop r> rdrop EXIT THEN THEN
1349 :			rdrop r>
1350 :			REPEAT nip nip ;
1351 :
1352 :	anton	1.47	(hashkey1) ( c_addr u ubits -- ukey ) gforth paren_hashkey1
1353 :	anton	1.1	""ukey is the hash key for the string c_addr u fitting in ubits bits""
1354 :	anton	1.125	ukey = hashkey1(c_addr, u, ubits);
1355 :	anton	1.1	:
1356 :			dup rot-values + c@ over 1 swap lshift 1- >r
1357 :			tuck - 2swap r> 0 2swap bounds
1358 :			?DO dup 4 pick lshift swap 3 pick rshift or
1359 :			I c@ toupper xor
1360 :			over and LOOP
1361 :			nip nip nip ;
1362 :			Create rot-values
1363 :			5 c, 0 c, 1 c, 2 c, 3 c, 4 c, 5 c, 5 c, 5 c, 5 c,
1364 :			3 c, 5 c, 5 c, 5 c, 5 c, 7 c, 5 c, 5 c, 5 c, 5 c,
1365 :			7 c, 5 c, 5 c, 5 c, 5 c, 6 c, 5 c, 5 c, 5 c, 5 c,
1366 :			7 c, 5 c, 5 c,
1367 :
1368 :	pazsan	1.15	\+
1369 :	anton	1.1
1370 :	anton	1.47	(parse-white) ( c_addr1 u1 -- c_addr2 u2 ) gforth paren_parse_white
1371 :	anton	1.125	struct Cellpair r=parse_white(c_addr1, u1);
1372 :			c_addr2 = (Char *)(r.n1);
1373 :			u2 = r.n2;
1374 :	anton	1.1	:
1375 :			BEGIN dup WHILE over c@ bl <= WHILE 1 /string
1376 :			REPEAT THEN 2dup
1377 :			BEGIN dup WHILE over c@ bl > WHILE 1 /string
1378 :			REPEAT THEN nip - ;
1379 :
1380 :	anton	1.47	aligned ( c_addr -- a_addr ) core
1381 :	crook	1.29	"" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1382 :	anton	1.1	a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
1383 :			:
1384 :			[ cell 1- ] Literal + [ -1 cells ] Literal and ;
1385 :
1386 :	anton	1.47	faligned ( c_addr -- f_addr ) float f_aligned
1387 :	crook	1.29	"" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1388 :	anton	1.1	f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
1389 :			:
1390 :			[ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
1391 :
1392 :	jwilke	1.35	\ threading stuff is currently only interesting if we have a compiler
1393 :			\fhas? standardthreading has? compiler and [IF]
1394 :	anton	1.47	threading-method ( -- n ) gforth threading_method
1395 :	anton	1.1	""0 if the engine is direct threaded. Note that this may change during
1396 :			the lifetime of an image.""
1397 :			#if defined(DOUBLY_INDIRECT)
1398 :			n=2;
1399 :			#else
1400 :			# if defined(DIRECT_THREADED)
1401 :			n=0;
1402 :			# else
1403 :			n=1;
1404 :			# endif
1405 :			#endif
1406 :			:
1407 :			1 ;
1408 :	jwilke	1.28
1409 :	jwilke	1.35	\f[THEN]
1410 :	anton	1.1
1411 :	pazsan	1.83	\g hostos
1412 :
1413 :	anton	1.47	key-file ( wfileid -- n ) gforth paren_key_file
1414 :	pazsan	1.17	#ifdef HAS_FILE
1415 :	anton	1.1	fflush(stdout);
1416 :	pazsan	1.12	n = key((FILE*)wfileid);
1417 :	pazsan	1.17	#else
1418 :			n = key(stdin);
1419 :			#endif
1420 :	anton	1.1
1421 :	anton	1.47	key?-file ( wfileid -- n ) facility key_q_file
1422 :	pazsan	1.17	#ifdef HAS_FILE
1423 :	anton	1.1	fflush(stdout);
1424 :	pazsan	1.12	n = key_query((FILE*)wfileid);
1425 :	pazsan	1.17	#else
1426 :			n = key_query(stdin);
1427 :			#endif
1428 :
1429 :			\+os
1430 :	pazsan	1.12
1431 :	anton	1.47	stdin ( -- wfileid ) gforth
1432 :	pazsan	1.12	wfileid = (Cell)stdin;
1433 :	anton	1.1
1434 :	anton	1.47	stdout ( -- wfileid ) gforth
1435 :	anton	1.1	wfileid = (Cell)stdout;
1436 :
1437 :	anton	1.47	stderr ( -- wfileid ) gforth
1438 :	anton	1.1	wfileid = (Cell)stderr;
1439 :
1440 :	anton	1.47	form ( -- urows ucols ) gforth
1441 :	anton	1.1	""The number of lines and columns in the terminal. These numbers may change
1442 :			with the window size.""
1443 :			/* we could block SIGWINCH here to get a consistent size, but I don't
1444 :			think this is necessary or always beneficial */
1445 :			urows=rows;
1446 :			ucols=cols;
1447 :
1448 :	anton	1.47	flush-icache ( c_addr u -- ) gforth flush_icache
1449 :	anton	1.1	""Make sure that the instruction cache of the processor (if there is
1450 :	crook	1.29	one) does not contain stale data at @i{c-addr} and @i{u} bytes
1451 :	anton	1.1	afterwards. @code{END-CODE} performs a @code{flush-icache}
1452 :			automatically. Caveat: @code{flush-icache} might not work on your
1453 :			installation; this is usually the case if direct threading is not
1454 :			supported on your machine (take a look at your @file{machine.h}) and
1455 :			your machine has a separate instruction cache. In such cases,
1456 :			@code{flush-icache} does nothing instead of flushing the instruction
1457 :			cache.""
1458 :			FLUSH_ICACHE(c_addr,u);
1459 :
1460 :	anton	1.47	(bye) ( n -- ) gforth paren_bye
1461 :	anton	1.77	SUPER_END;
1462 :	anton	1.1	return (Label *)n;
1463 :
1464 :	anton	1.125	(system) ( c_addr u -- wretval wior ) gforth paren_system
1465 :	pazsan	1.20	#ifndef MSDOS
1466 :	anton	1.1	int old_tp=terminal_prepped;
1467 :			deprep_terminal();
1468 :	pazsan	1.20	#endif
1469 :	anton	1.1	wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
1470 :			wior = IOR(wretval==-1 \|\| (wretval==127 && errno != 0));
1471 :	pazsan	1.20	#ifndef MSDOS
1472 :	anton	1.1	if (old_tp)
1473 :			prep_terminal();
1474 :	pazsan	1.20	#endif
1475 :	anton	1.1
1476 :	anton	1.47	getenv ( c_addr1 u1 -- c_addr2 u2 ) gforth
1477 :	crook	1.29	""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1478 :	crook	1.24	is the host operating system's expansion of that environment variable. If the
1479 :	crook	1.29	environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1480 :	crook	1.24	in length.""
1481 :	pazsan	1.46	/* close ' to keep fontify happy */
1482 :	anton	1.1	c_addr2 = getenv(cstr(c_addr1,u1,1));
1483 :			u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
1484 :
1485 :	anton	1.56	open-pipe ( c_addr u wfam -- wfileid wior ) gforth open_pipe
1486 :	pazsan	1.84	wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1487 :	anton	1.1	wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
1488 :
1489 :	anton	1.47	close-pipe ( wfileid -- wretval wior ) gforth close_pipe
1490 :	anton	1.1	wretval = pclose((FILE *)wfileid);
1491 :			wior = IOR(wretval==-1);
1492 :
1493 :	anton	1.47	time&date ( -- nsec nmin nhour nday nmonth nyear ) facility-ext time_and_date
1494 :	crook	1.44	""Report the current time of day. Seconds, minutes and hours are numbered from 0.
1495 :			Months are numbered from 1.""
1496 :	anton	1.127	#if 1
1497 :			time_t now;
1498 :			struct tm *ltime;
1499 :			time(&now);
1500 :			ltime=localtime(&now);
1501 :			#else
1502 :	anton	1.1	struct timeval time1;
1503 :			struct timezone zone1;
1504 :			struct tm *ltime;
1505 :			gettimeofday(&time1,&zone1);
1506 :	anton	1.51	/* !! Single Unix specification:
1507 :			If tzp is not a null pointer, the behaviour is unspecified. */
1508 :	anton	1.1	ltime=localtime((time_t *)&time1.tv_sec);
1509 :	anton	1.127	#endif
1510 :	anton	1.1	nyear =ltime->tm_year+1900;
1511 :			nmonth=ltime->tm_mon+1;
1512 :			nday =ltime->tm_mday;
1513 :			nhour =ltime->tm_hour;
1514 :			nmin =ltime->tm_min;
1515 :			nsec =ltime->tm_sec;
1516 :
1517 :	anton	1.47	ms ( n -- ) facility-ext
1518 :	crook	1.44	""Wait at least @i{n} milli-second.""
1519 :	anton	1.1	struct timeval timeout;
1520 :			timeout.tv_sec=n/1000;
1521 :			timeout.tv_usec=1000*(n%1000);
1522 :			(void)select(0,0,0,0,&timeout);
1523 :
1524 :	anton	1.47	allocate ( u -- a_addr wior ) memory
1525 :	crook	1.29	""Allocate @i{u} address units of contiguous data space. The initial
1526 :	crook	1.27	contents of the data space is undefined. If the allocation is successful,
1527 :	crook	1.29	@i{a-addr} is the start address of the allocated region and @i{wior}
1528 :			is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1529 :	anton	1.52	is a non-zero I/O result code.""
1530 :	anton	1.1	a_addr = (Cell *)malloc(u?u:1);
1531 :			wior = IOR(a_addr==NULL);
1532 :
1533 :	anton	1.47	free ( a_addr -- wior ) memory
1534 :	crook	1.29	""Return the region of data space starting at @i{a-addr} to the system.
1535 :	anton	1.52	The region must originally have been obtained using @code{allocate} or
1536 :	crook	1.29	@code{resize}. If the operational is successful, @i{wior} is 0.
1537 :	anton	1.52	If the operation fails, @i{wior} is a non-zero I/O result code.""
1538 :	anton	1.1	free(a_addr);
1539 :			wior = 0;
1540 :
1541 :	anton	1.47	resize ( a_addr1 u -- a_addr2 wior ) memory
1542 :	crook	1.26	""Change the size of the allocated area at @i{a-addr1} to @i{u}
1543 :	anton	1.1	address units, possibly moving the contents to a different
1544 :	crook	1.27	area. @i{a-addr2} is the address of the resulting area.
1545 :	anton	1.52	If the operation is successful, @i{wior} is 0.
1546 :			If the operation fails, @i{wior} is a non-zero
1547 :	crook	1.29	I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1548 :	crook	1.27	@code{resize} @code{allocate}s @i{u} address units.""
1549 :	anton	1.1	/* the following check is not necessary on most OSs, but it is needed
1550 :			on SunOS 4.1.2. */
1551 :	pazsan	1.46	/* close ' to keep fontify happy */
1552 :	anton	1.1	if (a_addr1==NULL)
1553 :			a_addr2 = (Cell *)malloc(u);
1554 :			else
1555 :			a_addr2 = (Cell *)realloc(a_addr1, u);
1556 :			wior = IOR(a_addr2==NULL); /* !! Define a return code */
1557 :
1558 :	anton	1.47	strerror ( n -- c_addr u ) gforth
1559 :	anton	1.1	c_addr = strerror(n);
1560 :			u = strlen(c_addr);
1561 :
1562 :	anton	1.47	strsignal ( n -- c_addr u ) gforth
1563 :	anton	1.133	c_addr = (Address)strsignal(n);
1564 :	anton	1.1	u = strlen(c_addr);
1565 :
1566 :	anton	1.47	call-c ( w -- ) gforth call_c
1567 :	anton	1.1	""Call the C function pointed to by @i{w}. The C function has to
1568 :			access the stack itself. The stack pointers are exported in the global
1569 :			variables @code{SP} and @code{FP}.""
1570 :			/* This is a first attempt at support for calls to C. This may change in
1571 :			the future */
1572 :	anton	1.64	IF_fpTOS(fp[0]=fpTOS);
1573 :	anton	1.1	FP=fp;
1574 :			SP=sp;
1575 :			((void (*)())w)();
1576 :			sp=SP;
1577 :			fp=FP;
1578 :	anton	1.64	IF_spTOS(spTOS=sp[0]);
1579 :			IF_fpTOS(fpTOS=fp[0]);
1580 :	anton	1.1
1581 :	pazsan	1.15	\+
1582 :			\+file
1583 :	anton	1.1
1584 :	anton	1.47	close-file ( wfileid -- wior ) file close_file
1585 :	anton	1.1	wior = IOR(fclose((FILE *)wfileid)==EOF);
1586 :
1587 :	anton	1.56	open-file ( c_addr u wfam -- wfileid wior ) file open_file
1588 :			wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
1589 :	crook	1.22	wior = IOR(wfileid == 0);
1590 :	anton	1.1
1591 :	anton	1.56	create-file ( c_addr u wfam -- wfileid wior ) file create_file
1592 :	anton	1.1	Cell fd;
1593 :	anton	1.56	fd = open(tilde_cstr(c_addr, u, 1), O_CREAT\|O_TRUNC\|ufileattr[wfam], 0666);
1594 :	anton	1.1	if (fd != -1) {
1595 :	anton	1.56	wfileid = (Cell)fdopen(fd, fileattr[wfam]);
1596 :	crook	1.22	wior = IOR(wfileid == 0);
1597 :	anton	1.1	} else {
1598 :	crook	1.22	wfileid = 0;
1599 :	anton	1.1	wior = IOR(1);
1600 :			}
1601 :
1602 :	anton	1.47	delete-file ( c_addr u -- wior ) file delete_file
1603 :	anton	1.1	wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
1604 :
1605 :	anton	1.47	rename-file ( c_addr1 u1 c_addr2 u2 -- wior ) file-ext rename_file
1606 :	crook	1.29	""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1607 :	anton	1.125	wior = rename_file(c_addr1, u1, c_addr2, u2);
1608 :	anton	1.1
1609 :	anton	1.47	file-position ( wfileid -- ud wior ) file file_position
1610 :	anton	1.1	/* !! use tell and lseek? */
1611 :	anton	1.108	ud = OFF2UD(ftello((FILE *)wfileid));
1612 :			wior = IOR(UD2OFF(ud)==-1);
1613 :	anton	1.1
1614 :	anton	1.47	reposition-file ( ud wfileid -- wior ) file reposition_file
1615 :	anton	1.108	wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1616 :	anton	1.1
1617 :	anton	1.47	file-size ( wfileid -- ud wior ) file file_size
1618 :	anton	1.1	struct stat buf;
1619 :			wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1620 :	anton	1.108	ud = OFF2UD(buf.st_size);
1621 :	anton	1.1
1622 :	anton	1.47	resize-file ( ud wfileid -- wior ) file resize_file
1623 :	anton	1.108	wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1624 :	anton	1.1
1625 :	anton	1.47	read-file ( c_addr u1 wfileid -- u2 wior ) file read_file
1626 :	anton	1.1	/* !! fread does not guarantee enough */
1627 :			u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1628 :			wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1629 :			/* !! is the value of ferror errno-compatible? */
1630 :			if (wior)
1631 :			clearerr((FILE *)wfileid);
1632 :
1633 :	anton	1.125	(read-line) ( c_addr u1 wfileid -- u2 flag u3 wior ) file paren_read_line
1634 :			struct Cellquad r = read_line(c_addr, u1, wfileid);
1635 :			u2 = r.n1;
1636 :			flag = r.n2;
1637 :			u3 = r.n3;
1638 :			wior = r.n4;
1639 :	anton	1.1
1640 :	pazsan	1.15	\+
1641 :	anton	1.1
1642 :	anton	1.47	write-file ( c_addr u1 wfileid -- wior ) file write_file
1643 :	anton	1.1	/* !! fwrite does not guarantee enough */
1644 :	pazsan	1.39	#ifdef HAS_FILE
1645 :	anton	1.1	{
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 :	pazsan	1.39	#else
1652 :			TYPE(c_addr, u1);
1653 :			#endif
1654 :	pazsan	1.17
1655 :	anton	1.47	emit-file ( c wfileid -- wior ) gforth emit_file
1656 :	pazsan	1.17	#ifdef HAS_FILE
1657 :	anton	1.1	wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
1658 :			if (wior)
1659 :			clearerr((FILE *)wfileid);
1660 :	pazsan	1.17	#else
1661 :	pazsan	1.36	PUTC(c);
1662 :	pazsan	1.17	#endif
1663 :	anton	1.1
1664 :	pazsan	1.15	\+file
1665 :	anton	1.1
1666 :	anton	1.47	flush-file ( wfileid -- wior ) file-ext flush_file
1667 :	anton	1.1	wior = IOR(fflush((FILE *) wfileid)==EOF);
1668 :
1669 :	anton	1.56	file-status ( c_addr u -- wfam wior ) file-ext file_status
1670 :	anton	1.125	struct Cellpair r = file_status(c_addr, u);
1671 :			wfam = r.n1;
1672 :			wior = r.n2;
1673 :	anton	1.1
1674 :	pazsan	1.112	file-eof? ( wfileid -- flag ) gforth file_eof_query
1675 :			flag = FLAG(feof((FILE *) wfileid));
1676 :	anton	1.1
1677 :	pazsan	1.112	open-dir ( c_addr u -- wdirid wior ) gforth open_dir
1678 :			""Open the directory specified by @i{c-addr, u}
1679 :			and return @i{dir-id} for futher access to it.""
1680 :			wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
1681 :			wior = IOR(wdirid == 0);
1682 :
1683 :			read-dir ( c_addr u1 wdirid -- u2 flag wior ) gforth read_dir
1684 :			""Attempt to read the next entry from the directory specified
1685 :			by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}.
1686 :			If the attempt fails because there is no more entries,
1687 :			@i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
1688 :			If the attempt to read the next entry fails because of any other reason,
1689 :			return @i{ior}<>0.
1690 :			If the attempt succeeds, store file name to the buffer at @i{c-addr}
1691 :			and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
1692 :			If the length of the file name is greater than @i{u1},
1693 :			store first @i{u1} characters from file name into the buffer and
1694 :			indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
1695 :			struct dirent * dent;
1696 :			dent = readdir((DIR *)wdirid);
1697 :			wior = 0;
1698 :			flag = -1;
1699 :			if(dent == NULL) {
1700 :			u2 = 0;
1701 :			flag = 0;
1702 :			} else {
1703 :			u2 = strlen(dent->d_name);
1704 :			if(u2 > u1) {
1705 :			u2 = u1;
1706 :			wior = -512-ENAMETOOLONG;
1707 :			}
1708 :			memmove(c_addr, dent->d_name, u2);
1709 :			}
1710 :
1711 :			close-dir ( wdirid -- wior ) gforth close_dir
1712 :			""Close the directory specified by @i{dir-id}.""
1713 :			wior = IOR(closedir((DIR *)wdirid));
1714 :
1715 :			filename-match ( c_addr1 u1 c_addr2 u2 -- flag ) gforth match_file
1716 :			char * string = cstr(c_addr1, u1, 1);
1717 :			char * pattern = cstr(c_addr2, u2, 0);
1718 :			flag = FLAG(!fnmatch(pattern, string, 0));
1719 :
1720 :			\+
1721 :
1722 :			newline ( -- c_addr u ) gforth
1723 :			""String containing the newline sequence of the host OS""
1724 :			char newline[] = {
1725 :	anton	1.115	#if DIRSEP=='/'
1726 :			/* Unix */
1727 :	pazsan	1.112	'\n'
1728 :			#else
1729 :	anton	1.115	/* DOS, Win, OS/2 */
1730 :	pazsan	1.112	'\r','\n'
1731 :			#endif
1732 :			};
1733 :			c_addr=newline;
1734 :			u=sizeof(newline);
1735 :			:
1736 :			"newline count ;
1737 :			Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
1738 :
1739 :			\+os
1740 :
1741 :			utime ( -- dtime ) gforth
1742 :			""Report the current time in microseconds since some epoch.""
1743 :			struct timeval time1;
1744 :			gettimeofday(&time1,NULL);
1745 :			dtime = timeval2us(&time1);
1746 :
1747 :			cputime ( -- duser dsystem ) gforth
1748 :			""duser and dsystem are the respective user- and system-level CPU
1749 :			times used since the start of the Forth system (excluding child
1750 :			processes), in microseconds (the granularity may be much larger,
1751 :			however). On platforms without the getrusage call, it reports elapsed
1752 :			time (since some epoch) for duser and 0 for dsystem.""
1753 :			#ifdef HAVE_GETRUSAGE
1754 :			struct rusage usage;
1755 :			getrusage(RUSAGE_SELF, &usage);
1756 :			duser = timeval2us(&usage.ru_utime);
1757 :			dsystem = timeval2us(&usage.ru_stime);
1758 :			#else
1759 :			struct timeval time1;
1760 :			gettimeofday(&time1,NULL);
1761 :			duser = timeval2us(&time1);
1762 :			#ifndef BUGGY_LONG_LONG
1763 :			dsystem = (DCell)0;
1764 :			#else
1765 :			dsystem=(DCell){0,0};
1766 :			#endif
1767 :			#endif
1768 :
1769 :			\+
1770 :
1771 :			\+floating
1772 :
1773 :			\g floating
1774 :	pazsan	1.83
1775 :	anton	1.1	comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
1776 :			comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
1777 :
1778 :	anton	1.47	d>f ( d -- r ) float d_to_f
1779 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1780 :			extern double ldexp(double x, int exp);
1781 :	anton	1.113	if (d.hi<0) {
1782 :			DCell d2=dnegate(d);
1783 :			r = -(ldexp((Float)d2.hi,CELL_BITS) + (Float)d2.lo);
1784 :			} else
1785 :			r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
1786 :	anton	1.1	#else
1787 :			r = d;
1788 :			#endif
1789 :
1790 :	anton	1.47	f>d ( r -- d ) float f_to_d
1791 :	pazsan	1.100	extern DCell double2ll(Float r);
1792 :			d = double2ll(r);
1793 :	anton	1.1
1794 :	anton	1.47	f! ( r f_addr -- ) float f_store
1795 :	anton	1.52	""Store @i{r} into the float at address @i{f-addr}.""
1796 :	anton	1.1	*f_addr = r;
1797 :
1798 :	anton	1.47	f@ ( f_addr -- r ) float f_fetch
1799 :	anton	1.52	""@i{r} is the float at address @i{f-addr}.""
1800 :	anton	1.1	r = *f_addr;
1801 :
1802 :	anton	1.47	df@ ( df_addr -- r ) float-ext d_f_fetch
1803 :	anton	1.52	""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1804 :	anton	1.1	#ifdef IEEE_FP
1805 :			r = *df_addr;
1806 :			#else
1807 :			!! df@
1808 :			#endif
1809 :
1810 :	anton	1.47	df! ( r df_addr -- ) float-ext d_f_store
1811 :	anton	1.52	""Store @i{r} as double-precision IEEE floating-point value to the
1812 :			address @i{df-addr}.""
1813 :	anton	1.1	#ifdef IEEE_FP
1814 :			*df_addr = r;
1815 :			#else
1816 :			!! df!
1817 :			#endif
1818 :
1819 :	anton	1.47	sf@ ( sf_addr -- r ) float-ext s_f_fetch
1820 :	anton	1.52	""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1821 :	anton	1.1	#ifdef IEEE_FP
1822 :			r = *sf_addr;
1823 :			#else
1824 :			!! sf@
1825 :			#endif
1826 :
1827 :	anton	1.47	sf! ( r sf_addr -- ) float-ext s_f_store
1828 :	anton	1.52	""Store @i{r} as single-precision IEEE floating-point value to the
1829 :			address @i{sf-addr}.""
1830 :	anton	1.1	#ifdef IEEE_FP
1831 :			*sf_addr = r;
1832 :			#else
1833 :			!! sf!
1834 :			#endif
1835 :
1836 :	anton	1.47	f+ ( r1 r2 -- r3 ) float f_plus
1837 :	anton	1.1	r3 = r1+r2;
1838 :
1839 :	anton	1.47	f- ( r1 r2 -- r3 ) float f_minus
1840 :	anton	1.1	r3 = r1-r2;
1841 :
1842 :	anton	1.47	f* ( r1 r2 -- r3 ) float f_star
1843 :	anton	1.1	r3 = r1*r2;
1844 :
1845 :	anton	1.47	f/ ( r1 r2 -- r3 ) float f_slash
1846 :	anton	1.1	r3 = r1/r2;
1847 :
1848 :	anton	1.47	f** ( r1 r2 -- r3 ) float-ext f_star_star
1849 :	crook	1.26	""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1850 :	anton	1.1	r3 = pow(r1,r2);
1851 :
1852 :	anton	1.47	fnegate ( r1 -- r2 ) float f_negate
1853 :	anton	1.1	r2 = - r1;
1854 :
1855 :	anton	1.47	fdrop ( r -- ) float f_drop
1856 :	anton	1.1
1857 :	anton	1.47	fdup ( r -- r r ) float f_dupe
1858 :	anton	1.1
1859 :	anton	1.47	fswap ( r1 r2 -- r2 r1 ) float f_swap
1860 :	anton	1.1
1861 :	anton	1.47	fover ( r1 r2 -- r1 r2 r1 ) float f_over
1862 :	anton	1.1
1863 :	anton	1.47	frot ( r1 r2 r3 -- r2 r3 r1 ) float f_rote
1864 :	anton	1.1
1865 :	anton	1.47	fnip ( r1 r2 -- r2 ) gforth f_nip
1866 :	anton	1.1
1867 :	anton	1.47	ftuck ( r1 r2 -- r2 r1 r2 ) gforth f_tuck
1868 :	anton	1.1
1869 :	anton	1.47	float+ ( f_addr1 -- f_addr2 ) float float_plus
1870 :	anton	1.52	""@code{1 floats +}.""
1871 :	anton	1.1	f_addr2 = f_addr1+1;
1872 :
1873 :	anton	1.47	floats ( n1 -- n2 ) float
1874 :	anton	1.52	""@i{n2} is the number of address units of @i{n1} floats.""
1875 :	anton	1.1	n2 = n1*sizeof(Float);
1876 :
1877 :	anton	1.47	floor ( r1 -- r2 ) float
1878 :	crook	1.26	""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1879 :	anton	1.1	/* !! unclear wording */
1880 :			r2 = floor(r1);
1881 :
1882 :	anton	1.105	fround ( r1 -- r2 ) gforth f_round
1883 :			""Round to the nearest integral value.""
1884 :	anton	1.1	r2 = rint(r1);
1885 :
1886 :	anton	1.47	fmax ( r1 r2 -- r3 ) float f_max
1887 :	anton	1.1	if (r1<r2)
1888 :			r3 = r2;
1889 :			else
1890 :			r3 = r1;
1891 :
1892 :	anton	1.47	fmin ( r1 r2 -- r3 ) float f_min
1893 :	anton	1.1	if (r1<r2)
1894 :			r3 = r1;
1895 :			else
1896 :			r3 = r2;
1897 :
1898 :	anton	1.47	represent ( r c_addr u -- n f1 f2 ) float
1899 :	anton	1.1	char *sig;
1900 :	anton	1.122	size_t siglen;
1901 :	anton	1.1	int flag;
1902 :			int decpt;
1903 :			sig=ecvt(r, u, &decpt, &flag);
1904 :	anton	1.122	n=(r==0. ? 1 : decpt);
1905 :	anton	1.1	f1=FLAG(flag!=0);
1906 :	anton	1.21	f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1907 :	anton	1.122	siglen=strlen(sig);
1908 :	anton	1.124	if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
1909 :			siglen=u;
1910 :	anton	1.122	memcpy(c_addr,sig,siglen);
1911 :	anton	1.123	memset(c_addr+siglen,f2?'0':' ',u-siglen);
1912 :	anton	1.1
1913 :	anton	1.47	>float ( c_addr u -- flag ) float to_float
1914 :	anton	1.56	""Actual stack effect: ( c_addr u -- r t \| f ). Attempt to convert the
1915 :			character string @i{c-addr u} to internal floating-point
1916 :			representation. If the string represents a valid floating-point number
1917 :			@i{r} is placed on the floating-point stack and @i{flag} is
1918 :			true. Otherwise, @i{flag} is false. A string of blanks is a special
1919 :			case and represents the floating-point number 0.""
1920 :	anton	1.1	Float r;
1921 :	anton	1.125	flag = to_float(c_addr, u, &r);
1922 :			if (flag) {
1923 :			IF_fpTOS(fp[0] = fpTOS);
1924 :			fp += -1;
1925 :			fpTOS = r;
1926 :	anton	1.1	}
1927 :
1928 :	anton	1.47	fabs ( r1 -- r2 ) float-ext f_abs
1929 :	anton	1.1	r2 = fabs(r1);
1930 :
1931 :	anton	1.47	facos ( r1 -- r2 ) float-ext f_a_cos
1932 :	anton	1.1	r2 = acos(r1);
1933 :
1934 :	anton	1.47	fasin ( r1 -- r2 ) float-ext f_a_sine
1935 :	anton	1.1	r2 = asin(r1);
1936 :
1937 :	anton	1.47	fatan ( r1 -- r2 ) float-ext f_a_tan
1938 :	anton	1.1	r2 = atan(r1);
1939 :
1940 :	anton	1.47	fatan2 ( r1 r2 -- r3 ) float-ext f_a_tan_two
1941 :	crook	1.26	""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1942 :	anton	1.1	intends this to be the inverse of @code{fsincos}. In gforth it is.""
1943 :			r3 = atan2(r1,r2);
1944 :
1945 :	anton	1.47	fcos ( r1 -- r2 ) float-ext f_cos
1946 :	anton	1.1	r2 = cos(r1);
1947 :
1948 :	anton	1.47	fexp ( r1 -- r2 ) float-ext f_e_x_p
1949 :	anton	1.1	r2 = exp(r1);
1950 :
1951 :	anton	1.47	fexpm1 ( r1 -- r2 ) float-ext f_e_x_p_m_one
1952 :	anton	1.1	""@i{r2}=@i{e}**@i{r1}@minus{}1""
1953 :			#ifdef HAVE_EXPM1
1954 :	pazsan	1.3	extern double
1955 :			#ifdef NeXT
1956 :			const
1957 :			#endif
1958 :			expm1(double);
1959 :	anton	1.1	r2 = expm1(r1);
1960 :			#else
1961 :			r2 = exp(r1)-1.;
1962 :			#endif
1963 :
1964 :	anton	1.47	fln ( r1 -- r2 ) float-ext f_l_n
1965 :	anton	1.1	r2 = log(r1);
1966 :
1967 :	anton	1.47	flnp1 ( r1 -- r2 ) float-ext f_l_n_p_one
1968 :	anton	1.1	""@i{r2}=ln(@i{r1}+1)""
1969 :			#ifdef HAVE_LOG1P
1970 :	pazsan	1.3	extern double
1971 :			#ifdef NeXT
1972 :			const
1973 :			#endif
1974 :			log1p(double);
1975 :	anton	1.1	r2 = log1p(r1);
1976 :			#else
1977 :			r2 = log(r1+1.);
1978 :			#endif
1979 :
1980 :	anton	1.47	flog ( r1 -- r2 ) float-ext f_log
1981 :	crook	1.26	""The decimal logarithm.""
1982 :	anton	1.1	r2 = log10(r1);
1983 :
1984 :	anton	1.47	falog ( r1 -- r2 ) float-ext f_a_log
1985 :	anton	1.1	""@i{r2}=10**@i{r1}""
1986 :			extern double pow10(double);
1987 :			r2 = pow10(r1);
1988 :
1989 :	anton	1.47	fsin ( r1 -- r2 ) float-ext f_sine
1990 :	anton	1.1	r2 = sin(r1);
1991 :
1992 :	anton	1.47	fsincos ( r1 -- r2 r3 ) float-ext f_sine_cos
1993 :	anton	1.1	""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
1994 :			r2 = sin(r1);
1995 :			r3 = cos(r1);
1996 :
1997 :	anton	1.47	fsqrt ( r1 -- r2 ) float-ext f_square_root
1998 :	anton	1.1	r2 = sqrt(r1);
1999 :
2000 :	anton	1.47	ftan ( r1 -- r2 ) float-ext f_tan
2001 :	anton	1.1	r2 = tan(r1);
2002 :			:
2003 :			fsincos f/ ;
2004 :
2005 :	anton	1.47	fsinh ( r1 -- r2 ) float-ext f_cinch
2006 :	anton	1.1	r2 = sinh(r1);
2007 :			:
2008 :			fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
2009 :
2010 :	anton	1.47	fcosh ( r1 -- r2 ) float-ext f_cosh
2011 :	anton	1.1	r2 = cosh(r1);
2012 :			:
2013 :			fexp fdup 1/f f+ f2/ ;
2014 :
2015 :	anton	1.47	ftanh ( r1 -- r2 ) float-ext f_tan_h
2016 :	anton	1.1	r2 = tanh(r1);
2017 :			:
2018 :			f2* fexpm1 fdup 2. d>f f+ f/ ;
2019 :
2020 :	anton	1.47	fasinh ( r1 -- r2 ) float-ext f_a_cinch
2021 :	anton	1.1	r2 = asinh(r1);
2022 :			:
2023 :			fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
2024 :
2025 :	anton	1.47	facosh ( r1 -- r2 ) float-ext f_a_cosh
2026 :	anton	1.1	r2 = acosh(r1);
2027 :			:
2028 :			fdup fdup f* 1. d>f f- fsqrt f+ fln ;
2029 :
2030 :	anton	1.47	fatanh ( r1 -- r2 ) float-ext f_a_tan_h
2031 :	anton	1.1	r2 = atanh(r1);
2032 :			:
2033 :			fdup f0< >r fabs 1. d>f fover f- f/ f2* flnp1 f2/
2034 :			r> IF fnegate THEN ;
2035 :
2036 :	anton	1.47	sfloats ( n1 -- n2 ) float-ext s_floats
2037 :	anton	1.52	""@i{n2} is the number of address units of @i{n1}
2038 :	crook	1.29	single-precision IEEE floating-point numbers.""
2039 :	anton	1.1	n2 = n1*sizeof(SFloat);
2040 :
2041 :	anton	1.47	dfloats ( n1 -- n2 ) float-ext d_floats
2042 :	anton	1.52	""@i{n2} is the number of address units of @i{n1}
2043 :	crook	1.29	double-precision IEEE floating-point numbers.""
2044 :	anton	1.1	n2 = n1*sizeof(DFloat);
2045 :
2046 :	anton	1.47	sfaligned ( c_addr -- sf_addr ) float-ext s_f_aligned
2047 :	anton	1.52	""@i{sf-addr} is the first single-float-aligned address greater
2048 :	crook	1.29	than or equal to @i{c-addr}.""
2049 :	anton	1.1	sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
2050 :			:
2051 :			[ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
2052 :
2053 :	anton	1.47	dfaligned ( c_addr -- df_addr ) float-ext d_f_aligned
2054 :	anton	1.52	""@i{df-addr} is the first double-float-aligned address greater
2055 :	crook	1.29	than or equal to @i{c-addr}.""
2056 :	anton	1.1	df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
2057 :			:
2058 :			[ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
2059 :
2060 :	pazsan	1.112	v* ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
2061 :			""dot-product: r=v1*v2. The first element of v1 is at f_addr1, the
2062 :			next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
2063 :			ucount elements.""
2064 :	anton	1.125	r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
2065 :	pazsan	1.112	:
2066 :			>r swap 2swap swap 0e r> 0 ?DO
2067 :			dup f@ over + 2swap dup f@ f* f+ over + 2swap
2068 :			LOOP 2drop 2drop ;
2069 :
2070 :			faxpy ( ra f_x nstridex f_y nstridey ucount -- ) gforth
2071 :			""vy=ra*vx+vy""
2072 :	anton	1.125	faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
2073 :	pazsan	1.112	:
2074 :			>r swap 2swap swap r> 0 ?DO
2075 :			fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
2076 :			LOOP 2drop 2drop fdrop ;
2077 :
2078 :			\+
2079 :
2080 :	anton	1.1	\ The following words access machine/OS/installation-dependent
2081 :			\ Gforth internals
2082 :			\ !! how about environmental queries DIRECT-THREADED,
2083 :			\ INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
2084 :
2085 :			\ local variable implementation primitives
2086 :	pazsan	1.112
2087 :	pazsan	1.15	\+glocals
2088 :	anton	1.1
2089 :	pazsan	1.110	\g locals
2090 :
2091 :	anton	1.68	@local# ( #noffset -- w ) gforth fetch_local_number
2092 :			w = (Cell )(lp+noffset);
2093 :	anton	1.1
2094 :	anton	1.47	@local0 ( -- w ) new fetch_local_zero
2095 :	pazsan	1.112	w = ((Cell *)lp)[0];
2096 :	anton	1.1
2097 :	anton	1.47	@local1 ( -- w ) new fetch_local_four
2098 :	pazsan	1.112	w = ((Cell *)lp)[1];
2099 :	anton	1.1
2100 :	anton	1.47	@local2 ( -- w ) new fetch_local_eight
2101 :	pazsan	1.112	w = ((Cell *)lp)[2];
2102 :	anton	1.1
2103 :	anton	1.47	@local3 ( -- w ) new fetch_local_twelve
2104 :	pazsan	1.112	w = ((Cell *)lp)[3];
2105 :	anton	1.1
2106 :	pazsan	1.15	\+floating
2107 :	anton	1.1
2108 :	anton	1.68	f@local# ( #noffset -- r ) gforth f_fetch_local_number
2109 :			r = (Float )(lp+noffset);
2110 :	anton	1.1
2111 :	anton	1.47	f@local0 ( -- r ) new f_fetch_local_zero
2112 :	pazsan	1.112	r = ((Float *)lp)[0];
2113 :	anton	1.1
2114 :	anton	1.47	f@local1 ( -- r ) new f_fetch_local_eight
2115 :	pazsan	1.112	r = ((Float *)lp)[1];
2116 :	anton	1.1
2117 :	pazsan	1.15	\+
2118 :	anton	1.1
2119 :	anton	1.68	laddr# ( #noffset -- c_addr ) gforth laddr_number
2120 :	anton	1.1	/* this can also be used to implement lp@ */
2121 :	anton	1.68	c_addr = (Char *)(lp+noffset);
2122 :	anton	1.1
2123 :	anton	1.68	lp+!# ( #noffset -- ) gforth lp_plus_store_number
2124 :	anton	1.1	""used with negative immediate values it allocates memory on the
2125 :			local stack, a positive immediate argument drops memory from the local
2126 :			stack""
2127 :	anton	1.68	lp += noffset;
2128 :	anton	1.1
2129 :	anton	1.47	lp- ( -- ) new minus_four_lp_plus_store
2130 :	anton	1.1	lp += -sizeof(Cell);
2131 :
2132 :	anton	1.47	lp+ ( -- ) new eight_lp_plus_store
2133 :	anton	1.1	lp += sizeof(Float);
2134 :
2135 :	anton	1.47	lp+2 ( -- ) new sixteen_lp_plus_store
2136 :	anton	1.1	lp += 2*sizeof(Float);
2137 :
2138 :	anton	1.47	lp! ( c_addr -- ) gforth lp_store
2139 :	anton	1.1	lp = (Address)c_addr;
2140 :
2141 :	anton	1.47	>l ( w -- ) gforth to_l
2142 :	anton	1.1	lp -= sizeof(Cell);
2143 :			(Cell )lp = w;
2144 :
2145 :	pazsan	1.15	\+floating
2146 :	anton	1.1
2147 :	anton	1.47	f>l ( r -- ) gforth f_to_l
2148 :	anton	1.1	lp -= sizeof(Float);
2149 :			(Float )lp = r;
2150 :
2151 :	anton	1.47	fpick ( u -- r ) gforth
2152 :	anton	1.52	""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
2153 :	anton	1.11	r = fp[u+1]; /* +1, because update of fp happens before this fragment */
2154 :			:
2155 :			floats fp@ + f@ ;
2156 :
2157 :	pazsan	1.15	\+
2158 :			\+
2159 :	anton	1.1
2160 :	pazsan	1.15	\+OS
2161 :	anton	1.1
2162 :	pazsan	1.110	\g syslib
2163 :
2164 :	pazsan	1.131	open-lib ( c_addr1 u1 -- u2 ) gforth open_lib
2165 :			#if defined(HAVE_LIBDL) \|\| defined(HAVE_DLOPEN)
2166 :			#ifndef RTLD_GLOBAL
2167 :			#define RTLD_GLOBAL 0
2168 :			#endif
2169 :			u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL \| RTLD_LAZY);
2170 :			#else
2171 :			# ifdef _WIN32
2172 :			u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
2173 :			# else
2174 :			#warning Define open-lib!
2175 :			u2 = 0;
2176 :			# endif
2177 :			#endif
2178 :
2179 :			lib-sym ( c_addr1 u1 u2 -- u3 ) gforth lib_sym
2180 :			#if defined(HAVE_LIBDL) \|\| defined(HAVE_DLOPEN)
2181 :			u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
2182 :			#else
2183 :			# ifdef _WIN32
2184 :			u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
2185 :			# else
2186 :			#warning Define lib-sym!
2187 :			u3 = 0;
2188 :			# endif
2189 :			#endif
2190 :
2191 :			\+FFCALL
2192 :
2193 :	pazsan	1.136	av-start-void ( c_addr -- ) gforth av_start_void
2194 :	pazsan	1.131	av_start_void(alist, c_addr);
2195 :
2196 :	pazsan	1.136	av-start-int ( c_addr -- ) gforth av_start_int
2197 :	pazsan	1.131	av_start_int(alist, c_addr, &irv);
2198 :
2199 :	pazsan	1.136	av-start-float ( c_addr -- ) gforth av_start_float
2200 :	pazsan	1.131	av_start_float(alist, c_addr, &frv);
2201 :
2202 :	pazsan	1.136	av-start-double ( c_addr -- ) gforth av_start_double
2203 :	pazsan	1.131	av_start_double(alist, c_addr, &drv);
2204 :
2205 :	pazsan	1.136	av-start-longlong ( c_addr -- ) gforth av_start_longlong
2206 :	pazsan	1.131	av_start_longlong(alist, c_addr, &llrv);
2207 :
2208 :	pazsan	1.136	av-start-ptr ( c_addr -- ) gforth av_start_ptr
2209 :	pazsan	1.131	av_start_ptr(alist, c_addr, void*, &prv);
2210 :
2211 :			av-int ( w -- ) gforth av_int
2212 :			av_int(alist, w);
2213 :
2214 :	pazsan	1.136	av-float ( r -- ) gforth av_float
2215 :	pazsan	1.131	av_float(alist, r);
2216 :
2217 :	pazsan	1.136	av-double ( r -- ) gforth av_double
2218 :	pazsan	1.131	av_double(alist, r);
2219 :
2220 :	pazsan	1.136	av-longlong ( d -- ) gforth av_longlong
2221 :	pazsan	1.131	av_longlong(alist, d);
2222 :
2223 :	pazsan	1.136	av-ptr ( c_addr -- ) gforth av_ptr
2224 :	pazsan	1.131	av_ptr(alist, void*, c_addr);
2225 :
2226 :	pazsan	1.136	av-int-r ( R:w -- ) gforth av_int_r
2227 :			av_int(alist, w);
2228 :
2229 :			av-float-r ( -- ) gforth av_float_r
2230 :			float r = (Float)lp;
2231 :			lp += sizeof(Float);
2232 :			av_float(alist, r);
2233 :
2234 :			av-double-r ( -- ) gforth av_double_r
2235 :			double r = (Float)lp;
2236 :			lp += sizeof(Float);
2237 :			av_double(alist, r);
2238 :
2239 :			av-longlong-r ( R:d -- ) gforth av_longlong_r
2240 :			av_longlong(alist, d);
2241 :
2242 :			av-ptr-r ( R:c_addr -- ) gforth av_ptr_r
2243 :			av_ptr(alist, void*, c_addr);
2244 :
2245 :			av-call-void ( -- ) gforth av_call_void
2246 :	pazsan	1.131	SAVE_REGS
2247 :			av_call(alist);
2248 :			REST_REGS
2249 :
2250 :	pazsan	1.136	av-call-int ( -- w ) gforth av_call_int
2251 :	pazsan	1.131	SAVE_REGS
2252 :			av_call(alist);
2253 :	pazsan	1.134	REST_REGS
2254 :	pazsan	1.131	w = irv;
2255 :
2256 :	pazsan	1.136	av-call-float ( -- r ) gforth av_call_float
2257 :	pazsan	1.131	SAVE_REGS
2258 :			av_call(alist);
2259 :			REST_REGS
2260 :			r = frv;
2261 :
2262 :	pazsan	1.136	av-call-double ( -- r ) gforth av_call_double
2263 :	pazsan	1.131	SAVE_REGS
2264 :			av_call(alist);
2265 :			REST_REGS
2266 :			r = drv;
2267 :
2268 :	pazsan	1.136	av-call-longlong ( -- d ) gforth av_call_longlong
2269 :	pazsan	1.131	SAVE_REGS
2270 :			av_call(alist);
2271 :			REST_REGS
2272 :			d = llrv;
2273 :
2274 :	pazsan	1.136	av-call-ptr ( -- c_addr ) gforth av_call_ptr
2275 :	pazsan	1.131	SAVE_REGS
2276 :			av_call(alist);
2277 :			REST_REGS
2278 :			c_addr = prv;
2279 :
2280 :	pazsan	1.135	alloc-callback ( a_ip -- c_addr ) gforth alloc_callback
2281 :			c_addr = (char )alloc_callback(engine_callback, (Xt )a_ip);
2282 :	pazsan	1.131
2283 :	pazsan	1.135	va-start-void ( -- ) gforth va_start_void
2284 :			va_start_void(clist);
2285 :	pazsan	1.131
2286 :	pazsan	1.135	va-start-int ( -- ) gforth va_start_int
2287 :			va_start_int(clist);
2288 :	pazsan	1.131
2289 :	pazsan	1.135	va-start-longlong ( -- ) gforth va_start_longlong
2290 :			va_start_longlong(clist);
2291 :	pazsan	1.131
2292 :	pazsan	1.135	va-start-ptr ( -- ) gforth va_start_ptr
2293 :			va_start_ptr(clist, (char *));
2294 :	pazsan	1.131
2295 :	pazsan	1.135	va-start-float ( -- ) gforth va_start_float
2296 :			va_start_float(clist);
2297 :
2298 :			va-start-double ( -- ) gforth va_start_double
2299 :			va_start_double(clist);
2300 :
2301 :			va-arg-int ( -- w ) gforth va_arg_int
2302 :			w = va_arg_int(clist);
2303 :
2304 :			va-arg-longlong ( -- d ) gforth va_arg_longlong
2305 :			d = va_arg_longlong(clist);
2306 :
2307 :			va-arg-ptr ( -- c_addr ) gforth va_arg_ptr
2308 :			c_addr = (char )va_arg_ptr(clist,char);
2309 :
2310 :			va-arg-float ( -- r ) gforth va_arg_float
2311 :			r = va_arg_float(clist);
2312 :
2313 :			va-arg-double ( -- r ) gforth va_arg_double
2314 :			r = va_arg_double(clist);
2315 :	pazsan	1.131
2316 :			va-return-void ( -- ) gforth va_return_void
2317 :			va_return_void(clist);
2318 :			return 0;
2319 :
2320 :			va-return-int ( w -- ) gforth va_return_int
2321 :			va_return_int(clist, w);
2322 :			return 0;
2323 :
2324 :			va-return-ptr ( c_addr -- ) gforth va_return_ptr
2325 :			va_return_ptr(clist, void *, c_addr);
2326 :			return 0;
2327 :
2328 :			va-return-longlong ( d -- ) gforth va_return_longlong
2329 :			va_return_longlong(clist, d);
2330 :			return 0;
2331 :
2332 :			va-return-float ( r -- ) gforth va_return_float
2333 :			va_return_float(clist, r);
2334 :			return 0;
2335 :
2336 :			va-return-double ( r -- ) gforth va_return_double
2337 :			va_return_double(clist, r);
2338 :			return 0;
2339 :
2340 :			\-
2341 :
2342 :	anton	1.1	define(`uploop',
2343 :			`pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
2344 :			define(`_uploop',
2345 :			`ifelse($1, `$3', `$5',
2346 :			`$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
2347 :			\ argflist(argnum): Forth argument list
2348 :			define(argflist,
2349 :			`ifelse($1, 0, `',
2350 :			`uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
2351 :			\ argdlist(argnum): declare C's arguments
2352 :			define(argdlist,
2353 :			`ifelse($1, 0, `',
2354 :			`uploop(`_i', 1, $1, `Cell, ', `Cell')')')
2355 :			\ argclist(argnum): pass C's arguments
2356 :			define(argclist,
2357 :			`ifelse($1, 0, `',
2358 :			`uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
2359 :			\ icall(argnum)
2360 :			define(icall,
2361 :	anton	1.47	`icall$1 ( argflist($1)u -- uret ) gforth
2362 :	pazsan	1.9	uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
2363 :	anton	1.1
2364 :			')
2365 :			define(fcall,
2366 :	anton	1.47	`fcall$1 ( argflist($1)u -- rret ) gforth
2367 :	pazsan	1.9	rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
2368 :	anton	1.1
2369 :			')
2370 :
2371 :	pazsan	1.46	\ close ' to keep fontify happy
2372 :	anton	1.1
2373 :			uploop(i, 0, 7, `icall(i)')
2374 :			icall(20)
2375 :			uploop(i, 0, 7, `fcall(i)')
2376 :			fcall(20)
2377 :
2378 :	pazsan	1.15	\+
2379 :	pazsan	1.131	\+
2380 :	anton	1.1
2381 :	anton	1.47	wcall ( u -- ) gforth
2382 :	anton	1.64	IF_fpTOS(fp[0]=fpTOS);
2383 :	jwilke	1.34	FP=fp;
2384 :	pazsan	1.95	sp=(Cell)(SYSCALL(Cell()(Cell , void *))u)(sp, &FP);
2385 :	jwilke	1.34	fp=FP;
2386 :	anton	1.64	IF_spTOS(spTOS=sp[0];)
2387 :			IF_fpTOS(fpTOS=fp[0]);
2388 :	pazsan	1.46
2389 :	pazsan	1.112	\+peephole
2390 :
2391 :			\g peephole
2392 :
2393 :	anton	1.119	compile-prim1 ( a_prim -- ) gforth compile_prim1
2394 :			""compile prim (incl. immargs) at @var{a_prim}""
2395 :			compile_prim1(a_prim);
2396 :
2397 :			finish-code ( -- ) gforth finish_code
2398 :			""Perform delayed steps in code generation (branch resolution, I-cache
2399 :			flushing).""
2400 :			finish_code();
2401 :
2402 :			forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
2403 :			f = forget_dyncode(c_code);
2404 :
2405 :			decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
2406 :			""a_prim is the code address of the primitive that has been
2407 :			compile_prim1ed to a_code""
2408 :	anton	1.121	a_prim = (Cell *)decompile_code((Label)a_code);
2409 :	anton	1.119
2410 :	pazsan	1.112	\ set-next-code and call2 do not appear in images and can be
2411 :			\ renumbered arbitrarily
2412 :	pazsan	1.46
2413 :	pazsan	1.112	set-next-code ( #w -- ) gforth set_next_code
2414 :			#ifdef NO_IP
2415 :			next_code = (Label)w;
2416 :			#endif
2417 :	jwilke	1.34
2418 :	pazsan	1.112	call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
2419 :			/* call with explicit return address */
2420 :			#ifdef NO_IP
2421 :			INST_TAIL;
2422 :			JUMP(a_callee);
2423 :	anton	1.45	#else
2424 :	pazsan	1.112	assert(0);
2425 :	anton	1.45	#endif
2426 :	pazsan	1.131
2427 :			tag-offsets ( -- a_addr ) gforth tag_offsets
2428 :			extern Cell groups[32];
2429 :			a_addr = groups;
2430 :	anton	1.51
2431 :	pazsan	1.54	\+
2432 :	anton	1.128
2433 :			\g static_super
2434 :
2435 :	anton	1.130	\C #if !defined(GFORTH_DEBUGGING) && !defined(INDIRECT_THREADED) && !defined(DOUBLY_INDIRECT) && !defined(VM_PROFILING)
2436 :
2437 :	pazsan	1.112	include(peeprules.vmg)
2438 :	anton	1.130
2439 :			\C #endif
2440 :	pazsan	1.54
2441 :	pazsan	1.112	\g end

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