1: \ Gforth primitives
2:
3: \ Copyright (C) 1995,1996,1997,1998,2000,2003 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: \E store-optimization on
108: \E ' noop tail-nextp2 ! \ now INST_TAIL just stores, but does not jump
109: \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:
114: \
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: undefine(`symbols')
143:
144: \g control
145:
146: noop ( -- ) gforth
147: :
148: ;
149:
150: 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:
167: execute ( xt -- ) core
168: ""Perform the semantics represented by the execution token, @i{xt}.""
169: #ifndef NO_IP
170: ip=IP;
171: #endif
172: IF_spTOS(spTOS = sp[0]);
173: SUPER_END;
174: EXEC(xt);
175:
176: perform ( a_addr -- ) gforth
177: ""@code{@@ execute}.""
178: /* and pfe */
179: #ifndef NO_IP
180: ip=IP;
181: #endif
182: IF_spTOS(spTOS = sp[0]);
183: SUPER_END;
184: EXEC(*(Xt *)a_addr);
185: :
186: @ execute ;
187:
188: ;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: \+glocals
228:
229: branch-lp+!# ( #a_target #nlocals -- ) gforth branch_lp_plus_store_number
230: /* this will probably not be used */
231: lp += nlocals;
232: #ifdef NO_IP
233: INST_TAIL;
234: JUMP(a_target);
235: #else
236: SET_IP((Xt *)a_target);
237: #endif
238:
239: \+
240:
241: 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: :
249: r> @ >r ;
250:
251: \ condbranch(forthname,stackeffect,restline,code1,code2,forthcode)
252: \ this is non-syntactical: code must open a brace that is closed by the macro
253: define(condbranch,
254: $1 ( `#'a_target $2 ) $3
255: $4 #ifdef NO_IP
256: INST_TAIL;
257: #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: }
265: SUPER_CONTINUE;
266: $6
267:
268: \+glocals
269:
270: $1-lp+!`#' ( `#'a_target `#'nlocals $2 ) $3_lp_plus_store_number
271: $4 #ifdef NO_IP
272: INST_TAIL;
273: #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: }
282: SUPER_CONTINUE;
283:
284: \+
285: )
286:
287: condbranch(?branch,f --,f83 question_branch,
288: ,if (f==0) {
289: ,:
290: 0= dup 0= \ !f f
291: r> tuck cell+ \ !f branchoffset f IP+
292: and -rot @ and or \ f&IP+|!f&branch
293: >r ;)
294:
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: \+xconds
299:
300: ?dup-?branch ( #a_target f -- f ) new question_dupe_question_branch
301: ""The run-time procedure compiled by @code{?DUP-IF}.""
302: if (f==0) {
303: sp++;
304: IF_spTOS(spTOS = sp[0]);
305: #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: }
313: SUPER_CONTINUE;
314:
315: ?dup-0=-?branch ( #a_target f -- ) new question_dupe_zero_equals_question_branch
316: ""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: #ifdef NO_IP
324: JUMP(a_target);
325: #else
326: SET_IP((Xt *)a_target);
327: NEXT;
328: #endif
329: }
330: SUPER_CONTINUE;
331:
332: \+
333: \fhas? skiploopprims 0= [IF]
334:
335: condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
336: n2=n1-1;
337: ,if (n1) {
338: ,:
339: r> r> dup 1- >r
340: IF @ >r ELSE cell+ >r THEN ;)
341:
342: condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_loop,
343: n2=n1+1;
344: ,if (n2 != nlimit) {
345: ,:
346: r> r> 1+ r> 2dup =
347: IF >r 1- >r cell+ >r
348: ELSE >r >r @ >r THEN ;)
349:
350: condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
351: /* !! 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: Cell olddiff = n1-nlimit;
355: n2=n1+n;
356: ,if ((olddiff^(olddiff+n))>=0 /* the limit is not crossed */
357: || (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: IF >r + >r @ >r
364: ELSE >r >r drop cell+ >r THEN ;)
365:
366: \+xconds
367:
368: condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
369: UCell olddiff = n1-nlimit;
370: n2=n1-u;
371: ,if (olddiff>u) {
372: ,)
373:
374: condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_symmetric_plus_loop,
375: ""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: Cell diff = n1-nlimit;
380: Cell newdiff = diff+n;
381: if (n<0) {
382: diff = -diff;
383: newdiff = -newdiff;
384: }
385: n2=n1+n;
386: ,if (diff>=0 || newdiff<0) {
387: ,)
388:
389: \+
390:
391: (for) ( ncount -- R:nlimit R:ncount ) cmFORTH paren_for
392: /* or (for) = >r -- collides with unloop! */
393: nlimit=0;
394: :
395: r> swap 0 >r >r >r ;
396:
397: (do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_do
398: :
399: r> swap rot >r >r >r ;
400:
401: (?do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_question_do
402: #ifdef NO_IP
403: INST_TAIL;
404: #endif
405: if (nstart == nlimit) {
406: #ifdef NO_IP
407: JUMP(a_target);
408: #else
409: SET_IP((Xt *)a_target);
410: INST_TAIL; NEXT_P2;
411: #endif
412: }
413: SUPER_CONTINUE;
414: :
415: 2dup =
416: IF r> swap rot >r >r
417: @ >r
418: ELSE r> swap rot >r >r
419: cell+ >r
420: THEN ; \ --> CORE-EXT
421:
422: \+xconds
423:
424: (+do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
425: #ifdef NO_IP
426: INST_TAIL;
427: #endif
428: if (nstart >= nlimit) {
429: #ifdef NO_IP
430: JUMP(a_target);
431: #else
432: SET_IP((Xt *)a_target);
433: INST_TAIL; NEXT_P2;
434: #endif
435: }
436: SUPER_CONTINUE;
437: :
438: swap 2dup
439: r> swap >r swap >r
440: >=
441: IF
442: @
443: ELSE
444: cell+
445: THEN >r ;
446:
447: (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: if (ustart >= ulimit) {
452: #ifdef NO_IP
453: JUMP(a_target);
454: #else
455: SET_IP((Xt *)a_target);
456: INST_TAIL; NEXT_P2;
457: #endif
458: }
459: SUPER_CONTINUE;
460: :
461: swap 2dup
462: r> swap >r swap >r
463: u>=
464: IF
465: @
466: ELSE
467: cell+
468: THEN >r ;
469:
470: (-do) ( #a_target nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
471: #ifdef NO_IP
472: INST_TAIL;
473: #endif
474: if (nstart <= nlimit) {
475: #ifdef NO_IP
476: JUMP(a_target);
477: #else
478: SET_IP((Xt *)a_target);
479: INST_TAIL; NEXT_P2;
480: #endif
481: }
482: SUPER_CONTINUE;
483: :
484: swap 2dup
485: r> swap >r swap >r
486: <=
487: IF
488: @
489: ELSE
490: cell+
491: THEN >r ;
492:
493: (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: if (ustart <= ulimit) {
498: #ifdef NO_IP
499: JUMP(a_target);
500: #else
501: SET_IP((Xt *)a_target);
502: INST_TAIL; NEXT_P2;
503: #endif
504: }
505: SUPER_CONTINUE;
506: :
507: swap 2dup
508: r> swap >r swap >r
509: u<=
510: IF
511: @
512: ELSE
513: cell+
514: THEN >r ;
515:
516: \+
517:
518: \ don't make any assumptions where the return stack is!!
519: \ implement this in machine code if it should run quickly!
520:
521: i ( R:n -- R:n n ) core
522: :
523: \ rp@ cell+ @ ;
524: r> r> tuck >r >r ;
525:
526: i' ( R:w R:w2 -- R:w R:w2 w ) gforth i_tick
527: :
528: \ rp@ cell+ cell+ @ ;
529: r> r> r> dup itmp ! >r >r >r itmp @ ;
530: variable itmp
531:
532: j ( R:n R:d1 -- n R:n R:d1 ) core
533: :
534: \ rp@ cell+ cell+ cell+ @ ;
535: r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
536: [IFUNDEF] itmp variable itmp [THEN]
537:
538: k ( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 ) gforth
539: :
540: \ 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:
544: \f[THEN]
545:
546: \ digit is high-level: 0/0%
547:
548: \g strings
549:
550: move ( c_from c_to ucount -- ) core
551: ""Copy the contents of @i{ucount} aus at @i{c-from} to
552: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
553: /* !! note that the standard specifies addr, not c-addr */
554: 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: cmove ( c_from c_to u -- ) string c_move
560: ""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: cmove(c_from,c_to,u);
565: :
566: bounds ?DO dup c@ I c! 1+ LOOP drop ;
567:
568: cmove> ( c_from c_to u -- ) string c_move_up
569: ""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: cmove_up(c_from,c_to,u);
574: :
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: fill ( c_addr u c -- ) core
580: ""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
581: memset(c_addr,c,u);
582: :
583: -rot bounds
584: ?DO dup I c! LOOP drop ;
585:
586: compare ( c_addr1 u1 c_addr2 u2 -- n ) string
587: ""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: is 1. Currently this is based on the machine's character
590: comparison. In the future, this may change to consider the current
591: locale and its collation order.""
592: /* close ' to keep fontify happy */
593: n = compare(c_addr1, u1, c_addr2, u2);
594: :
595: 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:
600: \ -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:
614: toupper ( c1 -- c2 ) gforth
615: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
616: is the equivalent upper-case character. All other characters are unchanged.""
617: c2 = toupper(c1);
618: :
619: dup [char] a - [ char z char a - 1 + ] Literal u< bl and - ;
620:
621: /string ( c_addr1 u1 n -- c_addr2 u2 ) string slash_string
622: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
623: characters from the start of the string.""
624: c_addr2 = c_addr1+n;
625: u2 = u1-n;
626: :
627: tuck - >r + r> dup 0< IF - 0 THEN ;
628:
629: \g arith
630:
631: lit ( #w -- w ) gforth
632: :
633: r> dup @ swap cell+ >r ;
634:
635: + ( n1 n2 -- n ) core plus
636: n = n1+n2;
637:
638: \ lit+ / lit_plus = lit +
639:
640: lit+ ( n1 #n2 -- n ) new lit_plus
641: n=n1+n2;
642:
643: \ PFE-0.9.14 has it differently, but the next release will have it as follows
644: under+ ( n1 n2 n3 -- n n2 ) gforth under_plus
645: ""add @i{n3} to @i{n1} (giving @i{n})""
646: n = n1+n3;
647: :
648: rot + swap ;
649:
650: - ( n1 n2 -- n ) core minus
651: n = n1-n2;
652: :
653: negate + ;
654:
655: negate ( n1 -- n2 ) core
656: /* use minus as alias */
657: n2 = -n1;
658: :
659: invert 1+ ;
660:
661: 1+ ( n1 -- n2 ) core one_plus
662: n2 = n1+1;
663: :
664: 1 + ;
665:
666: 1- ( n1 -- n2 ) core one_minus
667: n2 = n1-1;
668: :
669: 1 - ;
670:
671: max ( n1 n2 -- n ) core
672: if (n1<n2)
673: n = n2;
674: else
675: n = n1;
676: :
677: 2dup < IF swap THEN drop ;
678:
679: min ( n1 n2 -- n ) core
680: if (n1<n2)
681: n = n1;
682: else
683: n = n2;
684: :
685: 2dup > IF swap THEN drop ;
686:
687: abs ( n -- u ) core
688: if (n<0)
689: u = -n;
690: else
691: u = n;
692: :
693: dup 0< IF negate THEN ;
694:
695: * ( n1 n2 -- n ) core star
696: n = n1*n2;
697: :
698: um* drop ;
699:
700: / ( n1 n2 -- n ) core slash
701: n = n1/n2;
702: :
703: /mod nip ;
704:
705: mod ( n1 n2 -- n ) core
706: n = n1%n2;
707: :
708: /mod drop ;
709:
710: /mod ( n1 n2 -- n3 n4 ) core slash_mod
711: n4 = n1/n2;
712: n3 = n1%n2; /* !! is this correct? look into C standard! */
713: :
714: >r s>d r> fm/mod ;
715:
716: 2* ( n1 -- n2 ) core two_star
717: ""Shift left by 1; also works on unsigned numbers""
718: n2 = 2*n1;
719: :
720: dup + ;
721:
722: 2/ ( n1 -- n2 ) core two_slash
723: ""Arithmetic shift right by 1. For signed numbers this is a floored
724: division by 2 (note that @code{/} not necessarily floors).""
725: n2 = n1>>1;
726: :
727: dup MINI and IF 1 ELSE 0 THEN
728: [ bits/byte cell * 1- ] literal
729: 0 DO 2* swap dup 2* >r MINI and
730: IF 1 ELSE 0 THEN or r> swap
731: LOOP nip ;
732:
733: fm/mod ( d1 n1 -- n2 n3 ) core f_m_slash_mod
734: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
735: #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: sm/rem ( d1 n1 -- n2 n3 ) core s_m_slash_rem
756: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
757: #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: m* ( n1 n2 -- d ) core m_star
778: #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: um* ( u1 u2 -- ud ) core u_m_star
789: /* 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: 0 -rot dup [ 8 cells ] literal -
797: DO
798: dup 0< I' and d2*+ drop
799: LOOP ;
800: : d2*+ ( ud n -- ud+n c )
801: over MINI
802: and >r >r 2dup d+ swap r> + swap r> ;
803:
804: um/mod ( ud u1 -- u2 u3 ) core u_m_slash_mod
805: ""ud=u3*u1+u2, u1>u2>=0""
806: #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: ?DO /modstep
817: LOOP drop swap 1 rshift or swap ;
818: : /modstep ( ud c R: u -- ud-?u c R: u )
819: >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN d2*+ r> ;
820: : d2*+ ( ud n -- ud+n c )
821: over MINI
822: and >r >r 2dup d+ swap r> + swap r> ;
823:
824: m+ ( d1 n -- d2 ) double m_plus
825: #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: d+ ( d1 d2 -- d ) double d_plus
835: #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: d- ( d1 d2 -- d ) double d_minus
845: #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: dnegate ( d1 -- d2 ) double d_negate
855: /* 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: d2* ( d1 -- d2 ) double d_two_star
865: ""Shift left by 1; also works on unsigned numbers""
866: #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: d2/ ( d1 -- d2 ) double d_two_slash
876: ""Arithmetic shift right by 1. For signed numbers this is a floored
877: division by 2.""
878: #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: and ( w1 w2 -- w ) core
889: w = w1&w2;
890:
891: or ( w1 w2 -- w ) core
892: w = w1|w2;
893: :
894: invert swap invert and invert ;
895:
896: xor ( w1 w2 -- w ) core x_or
897: w = w1^w2;
898:
899: invert ( w1 -- w2 ) core
900: w2 = ~w1;
901: :
902: MAXU xor ;
903:
904: rshift ( u1 n -- u2 ) core r_shift
905: ""Logical shift right by @i{n} bits.""
906: u2 = u1>>n;
907: :
908: 0 ?DO 2/ MAXI and LOOP ;
909:
910: lshift ( u1 n -- u2 ) core l_shift
911: u2 = u1<<n;
912: :
913: 0 ?DO 2* LOOP ;
914:
915: \g compare
916:
917: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
918: define(comparisons,
919: $1= ( $2 -- f ) $6 $3equals
920: 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: $1<> ( $2 -- f ) $7 $3not_equals
929: 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: $1< ( $2 -- f ) $8 $3less_than
938: 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: $1> ( $2 -- f ) $9 $3greater_than
950: f = FLAG($4>$5);
951: :
952: [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
953: $1< ;
954:
955: $1<= ( $2 -- f ) gforth $3less_or_equal
956: f = FLAG($4<=$5);
957: :
958: $1> 0= ;
959:
960: $1>= ( $2 -- f ) gforth $3greater_or_equal
961: 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: $1= ( $2 -- f ) $6 $3equals
975: #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: $1<> ( $2 -- f ) $7 $3not_equals
982: #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: $1< ( $2 -- f ) $8 $3less_than
989: #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: $1> ( $2 -- f ) $9 $3greater_than
996: #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: $1<= ( $2 -- f ) gforth $3less_or_equal
1003: #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: $1>= ( $2 -- f ) gforth $3greater_or_equal
1010: #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: \+dcomps
1019:
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: \+
1025:
1026: within ( u1 u2 u3 -- f ) core-ext
1027: ""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: u2=u3); if u1 is in this range, @code{within} returns true.""
1034: f = FLAG(u1-u2 < u3-u2);
1035: :
1036: over - >r - r> u< ;
1037:
1038: \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: sp@ ( -- a_addr ) gforth sp_fetch
1050: a_addr = sp+1;
1051:
1052: sp! ( a_addr -- ) gforth sp_store
1053: sp = a_addr;
1054: /* works with and without spTOS caching */
1055:
1056: rp@ ( -- a_addr ) gforth rp_fetch
1057: a_addr = rp;
1058:
1059: rp! ( a_addr -- ) gforth rp_store
1060: rp = a_addr;
1061:
1062: \+floating
1063:
1064: fp@ ( -- f_addr ) gforth fp_fetch
1065: f_addr = fp;
1066:
1067: fp! ( f_addr -- ) gforth fp_store
1068: fp = f_addr;
1069:
1070: \+
1071:
1072: >r ( w -- R:w ) core to_r
1073: :
1074: (>r) ;
1075: : (>r) rp@ cell+ @ rp@ ! rp@ cell+ ! ;
1076:
1077: r> ( R:w -- w ) core r_from
1078: :
1079: rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
1080: Create (rdrop) ' ;s A,
1081:
1082: rdrop ( R:w -- ) gforth
1083: :
1084: r> r> drop >r ;
1085:
1086: 2>r ( d -- R:d ) core-ext two_to_r
1087: :
1088: swap r> swap >r swap >r >r ;
1089:
1090: 2r> ( R:d -- d ) core-ext two_r_from
1091: :
1092: r> r> swap r> swap >r swap ;
1093:
1094: 2r@ ( R:d -- R:d d ) core-ext two_r_fetch
1095: :
1096: i' j ;
1097:
1098: 2rdrop ( R:d -- ) gforth two_r_drop
1099: :
1100: r> r> drop r> drop >r ;
1101:
1102: over ( w1 w2 -- w1 w2 w1 ) core
1103: :
1104: sp@ cell+ @ ;
1105:
1106: drop ( w -- ) core
1107: :
1108: IF THEN ;
1109:
1110: swap ( w1 w2 -- w2 w1 ) core
1111: :
1112: >r (swap) ! r> (swap) @ ;
1113: Variable (swap)
1114:
1115: dup ( w -- w w ) core dupe
1116: :
1117: sp@ @ ;
1118:
1119: rot ( w1 w2 w3 -- w2 w3 w1 ) core rote
1120: :
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: -rot ( w1 w2 w3 -- w3 w1 w2 ) gforth not_rote
1129: :
1130: rot rot ;
1131:
1132: nip ( w1 w2 -- w2 ) core-ext
1133: :
1134: swap drop ;
1135:
1136: tuck ( w1 w2 -- w2 w1 w2 ) core-ext
1137: :
1138: swap over ;
1139:
1140: ?dup ( w -- w ) core question_dupe
1141: ""Actually the stack effect is: @code{( w -- 0 | w w )}. It performs a
1142: @code{dup} if w is nonzero.""
1143: if (w!=0) {
1144: IF_spTOS(*sp-- = w;)
1145: #ifndef USE_TOS
1146: *--sp = w;
1147: #endif
1148: }
1149: :
1150: dup IF dup THEN ;
1151:
1152: pick ( u -- w ) core-ext
1153: ""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1154: w = sp[u+1];
1155: :
1156: 1+ cells sp@ + @ ;
1157:
1158: 2drop ( w1 w2 -- ) core two_drop
1159: :
1160: drop drop ;
1161:
1162: 2dup ( w1 w2 -- w1 w2 w1 w2 ) core two_dupe
1163: :
1164: over over ;
1165:
1166: 2over ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 ) core two_over
1167: :
1168: 3 pick 3 pick ;
1169:
1170: 2swap ( w1 w2 w3 w4 -- w3 w4 w1 w2 ) core two_swap
1171: :
1172: rot >r rot r> ;
1173:
1174: 2rot ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 ) double-ext two_rote
1175: :
1176: >r >r 2swap r> r> 2swap ;
1177:
1178: 2nip ( w1 w2 w3 w4 -- w3 w4 ) gforth two_nip
1179: :
1180: 2swap 2drop ;
1181:
1182: 2tuck ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 ) gforth two_tuck
1183: :
1184: 2swap 2over ;
1185:
1186: \ toggle is high-level: 0.11/0.42%
1187:
1188: \g memory
1189:
1190: @ ( a_addr -- w ) core fetch
1191: ""@i{w} is the cell stored at @i{a_addr}.""
1192: w = *a_addr;
1193:
1194: \ lit@ / lit_fetch = lit @
1195:
1196: lit@ ( #a_addr -- w ) new lit_fetch
1197: w = *a_addr;
1198:
1199: ! ( w a_addr -- ) core store
1200: ""Store @i{w} into the cell at @i{a-addr}.""
1201: *a_addr = w;
1202:
1203: +! ( n a_addr -- ) core plus_store
1204: ""Add @i{n} to the cell at @i{a-addr}.""
1205: *a_addr += n;
1206: :
1207: tuck @ + swap ! ;
1208:
1209: c@ ( c_addr -- c ) core c_fetch
1210: ""@i{c} is the char stored at @i{c_addr}.""
1211: 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: c! ( c c_addr -- ) core c_store
1236: ""Store @i{c} into the char at @i{c-addr}.""
1237: *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: 2! ( w1 w2 a_addr -- ) core two_store
1266: ""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1267: a_addr[0] = w2;
1268: a_addr[1] = w1;
1269: :
1270: tuck ! cell+ ! ;
1271:
1272: 2@ ( a_addr -- w1 w2 ) core two_fetch
1273: ""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
1274: the content of the next cell.""
1275: w2 = a_addr[0];
1276: w1 = a_addr[1];
1277: :
1278: dup cell+ @ swap @ ;
1279:
1280: cell+ ( a_addr1 -- a_addr2 ) core cell_plus
1281: ""@code{1 cells +}""
1282: a_addr2 = a_addr1+1;
1283: :
1284: cell + ;
1285:
1286: cells ( n1 -- n2 ) core
1287: "" @i{n2} is the number of address units of @i{n1} cells.""
1288: 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: char+ ( c_addr1 -- c_addr2 ) core char_plus
1298: ""@code{1 chars +}.""
1299: c_addr2 = c_addr1 + 1;
1300: :
1301: 1+ ;
1302:
1303: (chars) ( n1 -- n2 ) gforth paren_chars
1304: n2 = n1 * sizeof(Char);
1305: :
1306: ;
1307:
1308: count ( c_addr1 -- c_addr2 u ) core
1309: ""@i{c-addr2} is the first character and @i{u} the length of the
1310: counted string at @i{c-addr1}.""
1311: u = *c_addr1;
1312: c_addr2 = c_addr1+1;
1313: :
1314: dup 1+ swap c@ ;
1315:
1316: \g compiler
1317:
1318: \+f83headerstring
1319:
1320: (f83find) ( c_addr u f83name1 -- f83name2 ) new paren_f83find
1321: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
1322: if ((UCell)F83NAME_COUNT(f83name1)==u &&
1323: memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1324: break;
1325: f83name2=f83name1;
1326: :
1327: BEGIN dup WHILE (find-samelen) dup WHILE
1328: >r 2dup r@ cell+ char+ capscomp 0=
1329: IF 2drop r> EXIT THEN
1330: r> @
1331: REPEAT THEN nip nip ;
1332: : (find-samelen) ( u f83name1 -- u f83name2/0 )
1333: BEGIN 2dup cell+ c@ $1F and <> WHILE @ dup 0= UNTIL THEN ;
1334: : capscomp ( c_addr1 u c_addr2 -- n )
1335: swap bounds
1336: ?DO dup c@ I c@ <>
1337: IF dup c@ toupper I c@ toupper =
1338: ELSE true THEN WHILE 1+ LOOP drop 0
1339: ELSE c@ toupper I c@ toupper - unloop THEN sgn ;
1340: : sgn ( n -- -1/0/1 )
1341: dup 0= IF EXIT THEN 0< 2* 1+ ;
1342:
1343: \-
1344:
1345: (listlfind) ( c_addr u longname1 -- longname2 ) new paren_listlfind
1346: longname2=listlfind(c_addr, u, longname1);
1347: :
1348: BEGIN dup WHILE (findl-samelen) dup WHILE
1349: >r 2dup r@ cell+ cell+ capscomp 0=
1350: IF 2drop r> EXIT THEN
1351: r> @
1352: REPEAT THEN nip nip ;
1353: : (findl-samelen) ( u longname1 -- u longname2/0 )
1354: BEGIN 2dup cell+ @ lcount-mask and <> WHILE @ dup 0= UNTIL THEN ;
1355:
1356: \+hash
1357:
1358: (hashlfind) ( c_addr u a_addr -- longname2 ) new paren_hashlfind
1359: longname2 = hashlfind(c_addr, u, a_addr);
1360: :
1361: BEGIN dup WHILE
1362: 2@ >r >r dup r@ cell+ @ lcount-mask and =
1363: IF 2dup r@ cell+ cell+ capscomp 0=
1364: IF 2drop r> rdrop EXIT THEN THEN
1365: rdrop r>
1366: REPEAT nip nip ;
1367:
1368: (tablelfind) ( c_addr u a_addr -- longname2 ) new paren_tablelfind
1369: ""A case-sensitive variant of @code{(hashfind)}""
1370: longname2 = tablelfind(c_addr, u, a_addr);
1371: :
1372: BEGIN dup WHILE
1373: 2@ >r >r dup r@ cell+ @ lcount-mask and =
1374: IF 2dup r@ cell+ cell+ -text 0=
1375: IF 2drop r> rdrop EXIT THEN THEN
1376: rdrop r>
1377: REPEAT nip nip ;
1378: : -text ( c_addr1 u c_addr2 -- n )
1379: swap bounds
1380: ?DO dup c@ I c@ = WHILE 1+ LOOP drop 0
1381: ELSE c@ I c@ - unloop THEN sgn ;
1382: : sgn ( n -- -1/0/1 )
1383: dup 0= IF EXIT THEN 0< 2* 1+ ;
1384:
1385: (hashkey1) ( c_addr u ubits -- ukey ) gforth paren_hashkey1
1386: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
1387: ukey = hashkey1(c_addr, u, ubits);
1388: :
1389: dup rot-values + c@ over 1 swap lshift 1- >r
1390: tuck - 2swap r> 0 2swap bounds
1391: ?DO dup 4 pick lshift swap 3 pick rshift or
1392: I c@ toupper xor
1393: over and LOOP
1394: nip nip nip ;
1395: Create rot-values
1396: 5 c, 0 c, 1 c, 2 c, 3 c, 4 c, 5 c, 5 c, 5 c, 5 c,
1397: 3 c, 5 c, 5 c, 5 c, 5 c, 7 c, 5 c, 5 c, 5 c, 5 c,
1398: 7 c, 5 c, 5 c, 5 c, 5 c, 6 c, 5 c, 5 c, 5 c, 5 c,
1399: 7 c, 5 c, 5 c,
1400:
1401: \+
1402:
1403: \+
1404:
1405: (parse-white) ( c_addr1 u1 -- c_addr2 u2 ) gforth paren_parse_white
1406: struct Cellpair r=parse_white(c_addr1, u1);
1407: c_addr2 = (Char *)(r.n1);
1408: u2 = r.n2;
1409: :
1410: BEGIN dup WHILE over c@ bl <= WHILE 1 /string
1411: REPEAT THEN 2dup
1412: BEGIN dup WHILE over c@ bl > WHILE 1 /string
1413: REPEAT THEN nip - ;
1414:
1415: aligned ( c_addr -- a_addr ) core
1416: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1417: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
1418: :
1419: [ cell 1- ] Literal + [ -1 cells ] Literal and ;
1420:
1421: faligned ( c_addr -- f_addr ) float f_aligned
1422: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1423: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
1424: :
1425: [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
1426:
1427: \ threading stuff is currently only interesting if we have a compiler
1428: \fhas? standardthreading has? compiler and [IF]
1429: threading-method ( -- n ) gforth threading_method
1430: ""0 if the engine is direct threaded. Note that this may change during
1431: the lifetime of an image.""
1432: #if defined(DOUBLY_INDIRECT)
1433: n=2;
1434: #else
1435: # if defined(DIRECT_THREADED)
1436: n=0;
1437: # else
1438: n=1;
1439: # endif
1440: #endif
1441: :
1442: 1 ;
1443:
1444: \f[THEN]
1445:
1446: \g hostos
1447:
1448: key-file ( wfileid -- n ) gforth paren_key_file
1449: #ifdef HAS_FILE
1450: fflush(stdout);
1451: n = key((FILE*)wfileid);
1452: #else
1453: n = key(stdin);
1454: #endif
1455:
1456: key?-file ( wfileid -- n ) facility key_q_file
1457: #ifdef HAS_FILE
1458: fflush(stdout);
1459: n = key_query((FILE*)wfileid);
1460: #else
1461: n = key_query(stdin);
1462: #endif
1463:
1464: \+os
1465:
1466: stdin ( -- wfileid ) gforth
1467: wfileid = (Cell)stdin;
1468:
1469: stdout ( -- wfileid ) gforth
1470: wfileid = (Cell)stdout;
1471:
1472: stderr ( -- wfileid ) gforth
1473: wfileid = (Cell)stderr;
1474:
1475: form ( -- urows ucols ) gforth
1476: ""The number of lines and columns in the terminal. These numbers may change
1477: with the window size.""
1478: /* we could block SIGWINCH here to get a consistent size, but I don't
1479: think this is necessary or always beneficial */
1480: urows=rows;
1481: ucols=cols;
1482:
1483: flush-icache ( c_addr u -- ) gforth flush_icache
1484: ""Make sure that the instruction cache of the processor (if there is
1485: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1486: afterwards. @code{END-CODE} performs a @code{flush-icache}
1487: automatically. Caveat: @code{flush-icache} might not work on your
1488: installation; this is usually the case if direct threading is not
1489: supported on your machine (take a look at your @file{machine.h}) and
1490: your machine has a separate instruction cache. In such cases,
1491: @code{flush-icache} does nothing instead of flushing the instruction
1492: cache.""
1493: FLUSH_ICACHE(c_addr,u);
1494:
1495: (bye) ( n -- ) gforth paren_bye
1496: SUPER_END;
1497: return (Label *)n;
1498:
1499: (system) ( c_addr u -- wretval wior ) gforth paren_system
1500: #ifndef MSDOS
1501: int old_tp=terminal_prepped;
1502: deprep_terminal();
1503: #endif
1504: wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
1505: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
1506: #ifndef MSDOS
1507: if (old_tp)
1508: prep_terminal();
1509: #endif
1510:
1511: getenv ( c_addr1 u1 -- c_addr2 u2 ) gforth
1512: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1513: is the host operating system's expansion of that environment variable. If the
1514: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1515: in length.""
1516: /* close ' to keep fontify happy */
1517: c_addr2 = getenv(cstr(c_addr1,u1,1));
1518: u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
1519:
1520: open-pipe ( c_addr u wfam -- wfileid wior ) gforth open_pipe
1521: wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1522: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
1523:
1524: close-pipe ( wfileid -- wretval wior ) gforth close_pipe
1525: wretval = pclose((FILE *)wfileid);
1526: wior = IOR(wretval==-1);
1527:
1528: time&date ( -- nsec nmin nhour nday nmonth nyear ) facility-ext time_and_date
1529: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
1530: Months are numbered from 1.""
1531: #if 1
1532: time_t now;
1533: struct tm *ltime;
1534: time(&now);
1535: ltime=localtime(&now);
1536: #else
1537: struct timeval time1;
1538: struct timezone zone1;
1539: struct tm *ltime;
1540: gettimeofday(&time1,&zone1);
1541: /* !! Single Unix specification:
1542: If tzp is not a null pointer, the behaviour is unspecified. */
1543: ltime=localtime((time_t *)&time1.tv_sec);
1544: #endif
1545: nyear =ltime->tm_year+1900;
1546: nmonth=ltime->tm_mon+1;
1547: nday =ltime->tm_mday;
1548: nhour =ltime->tm_hour;
1549: nmin =ltime->tm_min;
1550: nsec =ltime->tm_sec;
1551:
1552: ms ( n -- ) facility-ext
1553: ""Wait at least @i{n} milli-second.""
1554: struct timeval timeout;
1555: timeout.tv_sec=n/1000;
1556: timeout.tv_usec=1000*(n%1000);
1557: (void)select(0,0,0,0,&timeout);
1558:
1559: allocate ( u -- a_addr wior ) memory
1560: ""Allocate @i{u} address units of contiguous data space. The initial
1561: contents of the data space is undefined. If the allocation is successful,
1562: @i{a-addr} is the start address of the allocated region and @i{wior}
1563: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1564: is a non-zero I/O result code.""
1565: a_addr = (Cell *)malloc(u?u:1);
1566: wior = IOR(a_addr==NULL);
1567:
1568: free ( a_addr -- wior ) memory
1569: ""Return the region of data space starting at @i{a-addr} to the system.
1570: The region must originally have been obtained using @code{allocate} or
1571: @code{resize}. If the operational is successful, @i{wior} is 0.
1572: If the operation fails, @i{wior} is a non-zero I/O result code.""
1573: free(a_addr);
1574: wior = 0;
1575:
1576: resize ( a_addr1 u -- a_addr2 wior ) memory
1577: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1578: address units, possibly moving the contents to a different
1579: area. @i{a-addr2} is the address of the resulting area.
1580: If the operation is successful, @i{wior} is 0.
1581: If the operation fails, @i{wior} is a non-zero
1582: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1583: @code{resize} @code{allocate}s @i{u} address units.""
1584: /* the following check is not necessary on most OSs, but it is needed
1585: on SunOS 4.1.2. */
1586: /* close ' to keep fontify happy */
1587: if (a_addr1==NULL)
1588: a_addr2 = (Cell *)malloc(u);
1589: else
1590: a_addr2 = (Cell *)realloc(a_addr1, u);
1591: wior = IOR(a_addr2==NULL); /* !! Define a return code */
1592:
1593: strerror ( n -- c_addr u ) gforth
1594: c_addr = strerror(n);
1595: u = strlen(c_addr);
1596:
1597: strsignal ( n -- c_addr u ) gforth
1598: c_addr = (Address)strsignal(n);
1599: u = strlen(c_addr);
1600:
1601: call-c ( w -- ) gforth call_c
1602: ""Call the C function pointed to by @i{w}. The C function has to
1603: access the stack itself. The stack pointers are exported in the global
1604: variables @code{SP} and @code{FP}.""
1605: /* This is a first attempt at support for calls to C. This may change in
1606: the future */
1607: IF_fpTOS(fp[0]=fpTOS);
1608: FP=fp;
1609: SP=sp;
1610: ((void (*)())w)();
1611: sp=SP;
1612: fp=FP;
1613: IF_spTOS(spTOS=sp[0]);
1614: IF_fpTOS(fpTOS=fp[0]);
1615:
1616: \+
1617: \+file
1618:
1619: close-file ( wfileid -- wior ) file close_file
1620: wior = IOR(fclose((FILE *)wfileid)==EOF);
1621:
1622: open-file ( c_addr u wfam -- wfileid wior ) file open_file
1623: wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
1624: wior = IOR(wfileid == 0);
1625:
1626: create-file ( c_addr u wfam -- wfileid wior ) file create_file
1627: Cell fd;
1628: fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[wfam], 0666);
1629: if (fd != -1) {
1630: wfileid = (Cell)fdopen(fd, fileattr[wfam]);
1631: wior = IOR(wfileid == 0);
1632: } else {
1633: wfileid = 0;
1634: wior = IOR(1);
1635: }
1636:
1637: delete-file ( c_addr u -- wior ) file delete_file
1638: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
1639:
1640: rename-file ( c_addr1 u1 c_addr2 u2 -- wior ) file-ext rename_file
1641: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1642: wior = rename_file(c_addr1, u1, c_addr2, u2);
1643:
1644: file-position ( wfileid -- ud wior ) file file_position
1645: /* !! use tell and lseek? */
1646: ud = OFF2UD(ftello((FILE *)wfileid));
1647: wior = IOR(UD2OFF(ud)==-1);
1648:
1649: reposition-file ( ud wfileid -- wior ) file reposition_file
1650: wior = IOR(fseeko((FILE *)wfileid, UD2OFF(ud), SEEK_SET)==-1);
1651:
1652: file-size ( wfileid -- ud wior ) file file_size
1653: struct stat buf;
1654: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1655: ud = OFF2UD(buf.st_size);
1656:
1657: resize-file ( ud wfileid -- wior ) file resize_file
1658: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2OFF(ud))==-1);
1659:
1660: read-file ( c_addr u1 wfileid -- u2 wior ) file read_file
1661: /* !! fread does not guarantee enough */
1662: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1663: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1664: /* !! is the value of ferror errno-compatible? */
1665: if (wior)
1666: clearerr((FILE *)wfileid);
1667:
1668: (read-line) ( c_addr u1 wfileid -- u2 flag u3 wior ) file paren_read_line
1669: struct Cellquad r = read_line(c_addr, u1, wfileid);
1670: u2 = r.n1;
1671: flag = r.n2;
1672: u3 = r.n3;
1673: wior = r.n4;
1674:
1675: \+
1676:
1677: write-file ( c_addr u1 wfileid -- wior ) file write_file
1678: /* !! fwrite does not guarantee enough */
1679: #ifdef HAS_FILE
1680: {
1681: UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1682: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1683: if (wior)
1684: clearerr((FILE *)wfileid);
1685: }
1686: #else
1687: TYPE(c_addr, u1);
1688: #endif
1689:
1690: emit-file ( c wfileid -- wior ) gforth emit_file
1691: #ifdef HAS_FILE
1692: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
1693: if (wior)
1694: clearerr((FILE *)wfileid);
1695: #else
1696: PUTC(c);
1697: #endif
1698:
1699: \+file
1700:
1701: flush-file ( wfileid -- wior ) file-ext flush_file
1702: wior = IOR(fflush((FILE *) wfileid)==EOF);
1703:
1704: file-status ( c_addr u -- wfam wior ) file-ext file_status
1705: struct Cellpair r = file_status(c_addr, u);
1706: wfam = r.n1;
1707: wior = r.n2;
1708:
1709: file-eof? ( wfileid -- flag ) gforth file_eof_query
1710: flag = FLAG(feof((FILE *) wfileid));
1711:
1712: open-dir ( c_addr u -- wdirid wior ) gforth open_dir
1713: ""Open the directory specified by @i{c-addr, u}
1714: and return @i{dir-id} for futher access to it.""
1715: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
1716: wior = IOR(wdirid == 0);
1717:
1718: read-dir ( c_addr u1 wdirid -- u2 flag wior ) gforth read_dir
1719: ""Attempt to read the next entry from the directory specified
1720: by @i{dir-id} to the buffer of length @i{u1} at address @i{c-addr}.
1721: If the attempt fails because there is no more entries,
1722: @i{ior}=0, @i{flag}=0, @i{u2}=0, and the buffer is unmodified.
1723: If the attempt to read the next entry fails because of any other reason,
1724: return @i{ior}<>0.
1725: If the attempt succeeds, store file name to the buffer at @i{c-addr}
1726: and return @i{ior}=0, @i{flag}=true and @i{u2} equal to the size of the file name.
1727: If the length of the file name is greater than @i{u1},
1728: store first @i{u1} characters from file name into the buffer and
1729: indicate "name too long" with @i{ior}, @i{flag}=true, and @i{u2}=@i{u1}.""
1730: struct dirent * dent;
1731: dent = readdir((DIR *)wdirid);
1732: wior = 0;
1733: flag = -1;
1734: if(dent == NULL) {
1735: u2 = 0;
1736: flag = 0;
1737: } else {
1738: u2 = strlen(dent->d_name);
1739: if(u2 > u1) {
1740: u2 = u1;
1741: wior = -512-ENAMETOOLONG;
1742: }
1743: memmove(c_addr, dent->d_name, u2);
1744: }
1745:
1746: close-dir ( wdirid -- wior ) gforth close_dir
1747: ""Close the directory specified by @i{dir-id}.""
1748: wior = IOR(closedir((DIR *)wdirid));
1749:
1750: filename-match ( c_addr1 u1 c_addr2 u2 -- flag ) gforth match_file
1751: char * string = cstr(c_addr1, u1, 1);
1752: char * pattern = cstr(c_addr2, u2, 0);
1753: flag = FLAG(!fnmatch(pattern, string, 0));
1754:
1755: \+
1756:
1757: newline ( -- c_addr u ) gforth
1758: ""String containing the newline sequence of the host OS""
1759: char newline[] = {
1760: #if DIRSEP=='/'
1761: /* Unix */
1762: '\n'
1763: #else
1764: /* DOS, Win, OS/2 */
1765: '\r','\n'
1766: #endif
1767: };
1768: c_addr=newline;
1769: u=sizeof(newline);
1770: :
1771: "newline count ;
1772: Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
1773:
1774: \+os
1775:
1776: utime ( -- dtime ) gforth
1777: ""Report the current time in microseconds since some epoch.""
1778: struct timeval time1;
1779: gettimeofday(&time1,NULL);
1780: dtime = timeval2us(&time1);
1781:
1782: cputime ( -- duser dsystem ) gforth
1783: ""duser and dsystem are the respective user- and system-level CPU
1784: times used since the start of the Forth system (excluding child
1785: processes), in microseconds (the granularity may be much larger,
1786: however). On platforms without the getrusage call, it reports elapsed
1787: time (since some epoch) for duser and 0 for dsystem.""
1788: #ifdef HAVE_GETRUSAGE
1789: struct rusage usage;
1790: getrusage(RUSAGE_SELF, &usage);
1791: duser = timeval2us(&usage.ru_utime);
1792: dsystem = timeval2us(&usage.ru_stime);
1793: #else
1794: struct timeval time1;
1795: gettimeofday(&time1,NULL);
1796: duser = timeval2us(&time1);
1797: #ifndef BUGGY_LONG_LONG
1798: dsystem = (DCell)0;
1799: #else
1800: dsystem=(DCell){0,0};
1801: #endif
1802: #endif
1803:
1804: \+
1805:
1806: \+floating
1807:
1808: \g floating
1809:
1810: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
1811: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
1812:
1813: d>f ( d -- r ) float d_to_f
1814: #ifdef BUGGY_LONG_LONG
1815: extern double ldexp(double x, int exp);
1816: if (d.hi<0) {
1817: DCell d2=dnegate(d);
1818: r = -(ldexp((Float)d2.hi,CELL_BITS) + (Float)d2.lo);
1819: } else
1820: r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
1821: #else
1822: r = d;
1823: #endif
1824:
1825: f>d ( r -- d ) float f_to_d
1826: extern DCell double2ll(Float r);
1827: d = double2ll(r);
1828:
1829: f! ( r f_addr -- ) float f_store
1830: ""Store @i{r} into the float at address @i{f-addr}.""
1831: *f_addr = r;
1832:
1833: f@ ( f_addr -- r ) float f_fetch
1834: ""@i{r} is the float at address @i{f-addr}.""
1835: r = *f_addr;
1836:
1837: df@ ( df_addr -- r ) float-ext d_f_fetch
1838: ""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1839: #ifdef IEEE_FP
1840: r = *df_addr;
1841: #else
1842: !! df@
1843: #endif
1844:
1845: df! ( r df_addr -- ) float-ext d_f_store
1846: ""Store @i{r} as double-precision IEEE floating-point value to the
1847: address @i{df-addr}.""
1848: #ifdef IEEE_FP
1849: *df_addr = r;
1850: #else
1851: !! df!
1852: #endif
1853:
1854: sf@ ( sf_addr -- r ) float-ext s_f_fetch
1855: ""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1856: #ifdef IEEE_FP
1857: r = *sf_addr;
1858: #else
1859: !! sf@
1860: #endif
1861:
1862: sf! ( r sf_addr -- ) float-ext s_f_store
1863: ""Store @i{r} as single-precision IEEE floating-point value to the
1864: address @i{sf-addr}.""
1865: #ifdef IEEE_FP
1866: *sf_addr = r;
1867: #else
1868: !! sf!
1869: #endif
1870:
1871: f+ ( r1 r2 -- r3 ) float f_plus
1872: r3 = r1+r2;
1873:
1874: f- ( r1 r2 -- r3 ) float f_minus
1875: r3 = r1-r2;
1876:
1877: f* ( r1 r2 -- r3 ) float f_star
1878: r3 = r1*r2;
1879:
1880: f/ ( r1 r2 -- r3 ) float f_slash
1881: r3 = r1/r2;
1882:
1883: f** ( r1 r2 -- r3 ) float-ext f_star_star
1884: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1885: r3 = pow(r1,r2);
1886:
1887: fnegate ( r1 -- r2 ) float f_negate
1888: r2 = - r1;
1889:
1890: fdrop ( r -- ) float f_drop
1891:
1892: fdup ( r -- r r ) float f_dupe
1893:
1894: fswap ( r1 r2 -- r2 r1 ) float f_swap
1895:
1896: fover ( r1 r2 -- r1 r2 r1 ) float f_over
1897:
1898: frot ( r1 r2 r3 -- r2 r3 r1 ) float f_rote
1899:
1900: fnip ( r1 r2 -- r2 ) gforth f_nip
1901:
1902: ftuck ( r1 r2 -- r2 r1 r2 ) gforth f_tuck
1903:
1904: float+ ( f_addr1 -- f_addr2 ) float float_plus
1905: ""@code{1 floats +}.""
1906: f_addr2 = f_addr1+1;
1907:
1908: floats ( n1 -- n2 ) float
1909: ""@i{n2} is the number of address units of @i{n1} floats.""
1910: n2 = n1*sizeof(Float);
1911:
1912: floor ( r1 -- r2 ) float
1913: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1914: /* !! unclear wording */
1915: r2 = floor(r1);
1916:
1917: fround ( r1 -- r2 ) gforth f_round
1918: ""Round to the nearest integral value.""
1919: r2 = rint(r1);
1920:
1921: fmax ( r1 r2 -- r3 ) float f_max
1922: if (r1<r2)
1923: r3 = r2;
1924: else
1925: r3 = r1;
1926:
1927: fmin ( r1 r2 -- r3 ) float f_min
1928: if (r1<r2)
1929: r3 = r1;
1930: else
1931: r3 = r2;
1932:
1933: represent ( r c_addr u -- n f1 f2 ) float
1934: char *sig;
1935: size_t siglen;
1936: int flag;
1937: int decpt;
1938: sig=ecvt(r, u, &decpt, &flag);
1939: n=(r==0. ? 1 : decpt);
1940: f1=FLAG(flag!=0);
1941: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1942: siglen=strlen(sig);
1943: if (siglen>u) /* happens in glibc-2.1.3 if 999.. is rounded up */
1944: siglen=u;
1945: memcpy(c_addr,sig,siglen);
1946: memset(c_addr+siglen,f2?'0':' ',u-siglen);
1947:
1948: >float ( c_addr u -- flag ) float to_float
1949: ""Actual stack effect: ( c_addr u -- r t | f ). Attempt to convert the
1950: character string @i{c-addr u} to internal floating-point
1951: representation. If the string represents a valid floating-point number
1952: @i{r} is placed on the floating-point stack and @i{flag} is
1953: true. Otherwise, @i{flag} is false. A string of blanks is a special
1954: case and represents the floating-point number 0.""
1955: Float r;
1956: flag = to_float(c_addr, u, &r);
1957: if (flag) {
1958: IF_fpTOS(fp[0] = fpTOS);
1959: fp += -1;
1960: fpTOS = r;
1961: }
1962:
1963: fabs ( r1 -- r2 ) float-ext f_abs
1964: r2 = fabs(r1);
1965:
1966: facos ( r1 -- r2 ) float-ext f_a_cos
1967: r2 = acos(r1);
1968:
1969: fasin ( r1 -- r2 ) float-ext f_a_sine
1970: r2 = asin(r1);
1971:
1972: fatan ( r1 -- r2 ) float-ext f_a_tan
1973: r2 = atan(r1);
1974:
1975: fatan2 ( r1 r2 -- r3 ) float-ext f_a_tan_two
1976: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1977: intends this to be the inverse of @code{fsincos}. In gforth it is.""
1978: r3 = atan2(r1,r2);
1979:
1980: fcos ( r1 -- r2 ) float-ext f_cos
1981: r2 = cos(r1);
1982:
1983: fexp ( r1 -- r2 ) float-ext f_e_x_p
1984: r2 = exp(r1);
1985:
1986: fexpm1 ( r1 -- r2 ) float-ext f_e_x_p_m_one
1987: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
1988: #ifdef HAVE_EXPM1
1989: extern double
1990: #ifdef NeXT
1991: const
1992: #endif
1993: expm1(double);
1994: r2 = expm1(r1);
1995: #else
1996: r2 = exp(r1)-1.;
1997: #endif
1998:
1999: fln ( r1 -- r2 ) float-ext f_l_n
2000: r2 = log(r1);
2001:
2002: flnp1 ( r1 -- r2 ) float-ext f_l_n_p_one
2003: ""@i{r2}=ln(@i{r1}+1)""
2004: #ifdef HAVE_LOG1P
2005: extern double
2006: #ifdef NeXT
2007: const
2008: #endif
2009: log1p(double);
2010: r2 = log1p(r1);
2011: #else
2012: r2 = log(r1+1.);
2013: #endif
2014:
2015: flog ( r1 -- r2 ) float-ext f_log
2016: ""The decimal logarithm.""
2017: r2 = log10(r1);
2018:
2019: falog ( r1 -- r2 ) float-ext f_a_log
2020: ""@i{r2}=10**@i{r1}""
2021: extern double pow10(double);
2022: r2 = pow10(r1);
2023:
2024: fsin ( r1 -- r2 ) float-ext f_sine
2025: r2 = sin(r1);
2026:
2027: fsincos ( r1 -- r2 r3 ) float-ext f_sine_cos
2028: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
2029: r2 = sin(r1);
2030: r3 = cos(r1);
2031:
2032: fsqrt ( r1 -- r2 ) float-ext f_square_root
2033: r2 = sqrt(r1);
2034:
2035: ftan ( r1 -- r2 ) float-ext f_tan
2036: r2 = tan(r1);
2037: :
2038: fsincos f/ ;
2039:
2040: fsinh ( r1 -- r2 ) float-ext f_cinch
2041: r2 = sinh(r1);
2042: :
2043: fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
2044:
2045: fcosh ( r1 -- r2 ) float-ext f_cosh
2046: r2 = cosh(r1);
2047: :
2048: fexp fdup 1/f f+ f2/ ;
2049:
2050: ftanh ( r1 -- r2 ) float-ext f_tan_h
2051: r2 = tanh(r1);
2052: :
2053: f2* fexpm1 fdup 2. d>f f+ f/ ;
2054:
2055: fasinh ( r1 -- r2 ) float-ext f_a_cinch
2056: r2 = asinh(r1);
2057: :
2058: fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
2059:
2060: facosh ( r1 -- r2 ) float-ext f_a_cosh
2061: r2 = acosh(r1);
2062: :
2063: fdup fdup f* 1. d>f f- fsqrt f+ fln ;
2064:
2065: fatanh ( r1 -- r2 ) float-ext f_a_tan_h
2066: r2 = atanh(r1);
2067: :
2068: fdup f0< >r fabs 1. d>f fover f- f/ f2* flnp1 f2/
2069: r> IF fnegate THEN ;
2070:
2071: sfloats ( n1 -- n2 ) float-ext s_floats
2072: ""@i{n2} is the number of address units of @i{n1}
2073: single-precision IEEE floating-point numbers.""
2074: n2 = n1*sizeof(SFloat);
2075:
2076: dfloats ( n1 -- n2 ) float-ext d_floats
2077: ""@i{n2} is the number of address units of @i{n1}
2078: double-precision IEEE floating-point numbers.""
2079: n2 = n1*sizeof(DFloat);
2080:
2081: sfaligned ( c_addr -- sf_addr ) float-ext s_f_aligned
2082: ""@i{sf-addr} is the first single-float-aligned address greater
2083: than or equal to @i{c-addr}.""
2084: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
2085: :
2086: [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
2087:
2088: dfaligned ( c_addr -- df_addr ) float-ext d_f_aligned
2089: ""@i{df-addr} is the first double-float-aligned address greater
2090: than or equal to @i{c-addr}.""
2091: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
2092: :
2093: [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
2094:
2095: v* ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
2096: ""dot-product: r=v1*v2. The first element of v1 is at f_addr1, the
2097: next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
2098: ucount elements.""
2099: r = v_star(f_addr1, nstride1, f_addr2, nstride2, ucount);
2100: :
2101: >r swap 2swap swap 0e r> 0 ?DO
2102: dup f@ over + 2swap dup f@ f* f+ over + 2swap
2103: LOOP 2drop 2drop ;
2104:
2105: faxpy ( ra f_x nstridex f_y nstridey ucount -- ) gforth
2106: ""vy=ra*vx+vy""
2107: faxpy(ra, f_x, nstridex, f_y, nstridey, ucount);
2108: :
2109: >r swap 2swap swap r> 0 ?DO
2110: fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
2111: LOOP 2drop 2drop fdrop ;
2112:
2113: \+
2114:
2115: \ The following words access machine/OS/installation-dependent
2116: \ Gforth internals
2117: \ !! how about environmental queries DIRECT-THREADED,
2118: \ INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
2119:
2120: \ local variable implementation primitives
2121:
2122: \+glocals
2123:
2124: \g locals
2125:
2126: @local# ( #noffset -- w ) gforth fetch_local_number
2127: w = *(Cell *)(lp+noffset);
2128:
2129: @local0 ( -- w ) new fetch_local_zero
2130: w = ((Cell *)lp)[0];
2131:
2132: @local1 ( -- w ) new fetch_local_four
2133: w = ((Cell *)lp)[1];
2134:
2135: @local2 ( -- w ) new fetch_local_eight
2136: w = ((Cell *)lp)[2];
2137:
2138: @local3 ( -- w ) new fetch_local_twelve
2139: w = ((Cell *)lp)[3];
2140:
2141: \+floating
2142:
2143: f@local# ( #noffset -- r ) gforth f_fetch_local_number
2144: r = *(Float *)(lp+noffset);
2145:
2146: f@local0 ( -- r ) new f_fetch_local_zero
2147: r = ((Float *)lp)[0];
2148:
2149: f@local1 ( -- r ) new f_fetch_local_eight
2150: r = ((Float *)lp)[1];
2151:
2152: \+
2153:
2154: laddr# ( #noffset -- c_addr ) gforth laddr_number
2155: /* this can also be used to implement lp@ */
2156: c_addr = (Char *)(lp+noffset);
2157:
2158: lp+!# ( #noffset -- ) gforth lp_plus_store_number
2159: ""used with negative immediate values it allocates memory on the
2160: local stack, a positive immediate argument drops memory from the local
2161: stack""
2162: lp += noffset;
2163:
2164: lp- ( -- ) new minus_four_lp_plus_store
2165: lp += -sizeof(Cell);
2166:
2167: lp+ ( -- ) new eight_lp_plus_store
2168: lp += sizeof(Float);
2169:
2170: lp+2 ( -- ) new sixteen_lp_plus_store
2171: lp += 2*sizeof(Float);
2172:
2173: lp! ( c_addr -- ) gforth lp_store
2174: lp = (Address)c_addr;
2175:
2176: >l ( w -- ) gforth to_l
2177: lp -= sizeof(Cell);
2178: *(Cell *)lp = w;
2179:
2180: \+floating
2181:
2182: f>l ( r -- ) gforth f_to_l
2183: lp -= sizeof(Float);
2184: *(Float *)lp = r;
2185:
2186: fpick ( u -- r ) gforth
2187: ""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
2188: r = fp[u+1]; /* +1, because update of fp happens before this fragment */
2189: :
2190: floats fp@ + f@ ;
2191:
2192: \+
2193: \+
2194:
2195: \+OS
2196:
2197: \g syslib
2198:
2199: open-lib ( c_addr1 u1 -- u2 ) gforth open_lib
2200: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
2201: #ifndef RTLD_GLOBAL
2202: #define RTLD_GLOBAL 0
2203: #endif
2204: u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL | RTLD_LAZY);
2205: #else
2206: # ifdef _WIN32
2207: u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
2208: # else
2209: #warning Define open-lib!
2210: u2 = 0;
2211: # endif
2212: #endif
2213:
2214: lib-sym ( c_addr1 u1 u2 -- u3 ) gforth lib_sym
2215: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
2216: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
2217: #else
2218: # ifdef _WIN32
2219: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
2220: # else
2221: #warning Define lib-sym!
2222: u3 = 0;
2223: # endif
2224: #endif
2225:
2226: \+FFCALL
2227:
2228: av-start-void ( c_addr -- ) gforth av_start_void
2229: av_start_void(alist, c_addr);
2230:
2231: av-start-int ( c_addr -- ) gforth av_start_int
2232: av_start_int(alist, c_addr, &irv);
2233:
2234: av-start-float ( c_addr -- ) gforth av_start_float
2235: av_start_float(alist, c_addr, &frv);
2236:
2237: av-start-double ( c_addr -- ) gforth av_start_double
2238: av_start_double(alist, c_addr, &drv);
2239:
2240: av-start-longlong ( c_addr -- ) gforth av_start_longlong
2241: av_start_longlong(alist, c_addr, &llrv);
2242:
2243: av-start-ptr ( c_addr -- ) gforth av_start_ptr
2244: av_start_ptr(alist, c_addr, void*, &prv);
2245:
2246: av-int ( w -- ) gforth av_int
2247: av_int(alist, w);
2248:
2249: av-float ( r -- ) gforth av_float
2250: av_float(alist, r);
2251:
2252: av-double ( r -- ) gforth av_double
2253: av_double(alist, r);
2254:
2255: av-longlong ( d -- ) gforth av_longlong
2256: av_longlong(alist, d);
2257:
2258: av-ptr ( c_addr -- ) gforth av_ptr
2259: av_ptr(alist, void*, c_addr);
2260:
2261: av-int-r ( R:w -- ) gforth av_int_r
2262: av_int(alist, w);
2263:
2264: av-float-r ( -- ) gforth av_float_r
2265: float r = *(Float*)lp;
2266: lp += sizeof(Float);
2267: av_float(alist, r);
2268:
2269: av-double-r ( -- ) gforth av_double_r
2270: double r = *(Float*)lp;
2271: lp += sizeof(Float);
2272: av_double(alist, r);
2273:
2274: av-longlong-r ( R:d -- ) gforth av_longlong_r
2275: av_longlong(alist, d);
2276:
2277: av-ptr-r ( R:c_addr -- ) gforth av_ptr_r
2278: av_ptr(alist, void*, c_addr);
2279:
2280: av-call-void ( -- ) gforth av_call_void
2281: SAVE_REGS
2282: av_call(alist);
2283: REST_REGS
2284:
2285: av-call-int ( -- w ) gforth av_call_int
2286: SAVE_REGS
2287: av_call(alist);
2288: REST_REGS
2289: w = irv;
2290:
2291: av-call-float ( -- r ) gforth av_call_float
2292: SAVE_REGS
2293: av_call(alist);
2294: REST_REGS
2295: r = frv;
2296:
2297: av-call-double ( -- r ) gforth av_call_double
2298: SAVE_REGS
2299: av_call(alist);
2300: REST_REGS
2301: r = drv;
2302:
2303: av-call-longlong ( -- d ) gforth av_call_longlong
2304: SAVE_REGS
2305: av_call(alist);
2306: REST_REGS
2307: d = llrv;
2308:
2309: av-call-ptr ( -- c_addr ) gforth av_call_ptr
2310: SAVE_REGS
2311: av_call(alist);
2312: REST_REGS
2313: c_addr = prv;
2314:
2315: alloc-callback ( a_ip -- c_addr ) gforth alloc_callback
2316: c_addr = (char *)alloc_callback(engine_callback, (Xt *)a_ip);
2317:
2318: va-start-void ( -- ) gforth va_start_void
2319: va_start_void(clist);
2320:
2321: va-start-int ( -- ) gforth va_start_int
2322: va_start_int(clist);
2323:
2324: va-start-longlong ( -- ) gforth va_start_longlong
2325: va_start_longlong(clist);
2326:
2327: va-start-ptr ( -- ) gforth va_start_ptr
2328: va_start_ptr(clist, (char *));
2329:
2330: va-start-float ( -- ) gforth va_start_float
2331: va_start_float(clist);
2332:
2333: va-start-double ( -- ) gforth va_start_double
2334: va_start_double(clist);
2335:
2336: va-arg-int ( -- w ) gforth va_arg_int
2337: w = va_arg_int(clist);
2338:
2339: va-arg-longlong ( -- d ) gforth va_arg_longlong
2340: d = va_arg_longlong(clist);
2341:
2342: va-arg-ptr ( -- c_addr ) gforth va_arg_ptr
2343: c_addr = (char *)va_arg_ptr(clist,char*);
2344:
2345: va-arg-float ( -- r ) gforth va_arg_float
2346: r = va_arg_float(clist);
2347:
2348: va-arg-double ( -- r ) gforth va_arg_double
2349: r = va_arg_double(clist);
2350:
2351: va-return-void ( -- ) gforth va_return_void
2352: va_return_void(clist);
2353: return 0;
2354:
2355: va-return-int ( w -- ) gforth va_return_int
2356: va_return_int(clist, w);
2357: return 0;
2358:
2359: va-return-ptr ( c_addr -- ) gforth va_return_ptr
2360: va_return_ptr(clist, void *, c_addr);
2361: return 0;
2362:
2363: va-return-longlong ( d -- ) gforth va_return_longlong
2364: va_return_longlong(clist, d);
2365: return 0;
2366:
2367: va-return-float ( r -- ) gforth va_return_float
2368: va_return_float(clist, r);
2369: return 0;
2370:
2371: va-return-double ( r -- ) gforth va_return_double
2372: va_return_double(clist, r);
2373: return 0;
2374:
2375: \-
2376:
2377: define(`uploop',
2378: `pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
2379: define(`_uploop',
2380: `ifelse($1, `$3', `$5',
2381: `$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
2382: \ argflist(argnum): Forth argument list
2383: define(argflist,
2384: `ifelse($1, 0, `',
2385: `uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
2386: \ argdlist(argnum): declare C's arguments
2387: define(argdlist,
2388: `ifelse($1, 0, `',
2389: `uploop(`_i', 1, $1, `Cell, ', `Cell')')')
2390: \ argclist(argnum): pass C's arguments
2391: define(argclist,
2392: `ifelse($1, 0, `',
2393: `uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
2394: \ icall(argnum)
2395: define(icall,
2396: `icall$1 ( argflist($1)u -- uret ) gforth
2397: uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
2398:
2399: ')
2400: define(fcall,
2401: `fcall$1 ( argflist($1)u -- rret ) gforth
2402: rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
2403:
2404: ')
2405:
2406: \ close ' to keep fontify happy
2407:
2408: uploop(i, 0, 7, `icall(i)')
2409: icall(20)
2410: uploop(i, 0, 7, `fcall(i)')
2411: fcall(20)
2412:
2413: \+
2414: \+
2415:
2416: wcall ( u -- ) gforth
2417: IF_fpTOS(fp[0]=fpTOS);
2418: FP=fp;
2419: sp=(Cell*)(SYSCALL(Cell*(*)(Cell *, void *))u)(sp, &FP);
2420: fp=FP;
2421: IF_spTOS(spTOS=sp[0];)
2422: IF_fpTOS(fpTOS=fp[0]);
2423:
2424: \+peephole
2425:
2426: \g peephole
2427:
2428: compile-prim1 ( a_prim -- ) gforth compile_prim1
2429: ""compile prim (incl. immargs) at @var{a_prim}""
2430: compile_prim1(a_prim);
2431:
2432: finish-code ( -- ) gforth finish_code
2433: ""Perform delayed steps in code generation (branch resolution, I-cache
2434: flushing).""
2435: finish_code();
2436:
2437: forget-dyncode ( c_code -- f ) gforth-internal forget_dyncode
2438: f = forget_dyncode(c_code);
2439:
2440: decompile-prim ( a_code -- a_prim ) gforth-internal decompile_prim
2441: ""a_prim is the code address of the primitive that has been
2442: compile_prim1ed to a_code""
2443: a_prim = (Cell *)decompile_code((Label)a_code);
2444:
2445: \ set-next-code and call2 do not appear in images and can be
2446: \ renumbered arbitrarily
2447:
2448: set-next-code ( #w -- ) gforth set_next_code
2449: #ifdef NO_IP
2450: next_code = (Label)w;
2451: #endif
2452:
2453: call2 ( #a_callee #a_ret_addr -- R:a_ret_addr ) gforth
2454: /* call with explicit return address */
2455: #ifdef NO_IP
2456: INST_TAIL;
2457: JUMP(a_callee);
2458: #else
2459: assert(0);
2460: #endif
2461:
2462: tag-offsets ( -- a_addr ) gforth tag_offsets
2463: extern Cell groups[32];
2464: a_addr = groups;
2465:
2466: \+
2467:
2468: \g static_super
2469:
2470: \C #if !defined(GFORTH_DEBUGGING) && !defined(INDIRECT_THREADED) && !defined(DOUBLY_INDIRECT) && !defined(VM_PROFILING)
2471:
2472: include(peeprules.vmg)
2473:
2474: \C #endif
2475:
2476: \g end
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