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prims2x.fs
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Thu Nov 17 15:53:19 1994 UTC (29 years, 5 months ago) by
pazsan
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*Added:
* configure.bat configures on MS-DOS machines
* io-dos.h provides IO for MS-DOS
* makefile.dos is a GNU make Makefile for MS-DOS
*Changed:
* Merged gray/gforth and gray/gray4, added conditional compilation for
gray ports (gforth and bigFORTH first)
* added gforth recognising string in environment
* added interpreter support for images (starts now with magic)
* changed make rule for ds2texi, so that it can run with Messy-DOS
* added SAVESYSTEM in dumpimage.fs
* fixed bug in Makefile for big endian systems (->configure)
1: \ This is not very nice (hard limits, no checking, assumes 1 chars = 1)
2:
3: \ Optimizations:
4: \ superfluous stores are removed. GCC removes the superfluous loads by itself
5: \ TOS and FTOS can be kept in register( variable)s.
6: \
7: \ Problems:
8: \ The TOS optimization is somewhat hairy. The problems by example:
9: \ 1) dup ( w -- w w ): w=TOS; sp-=1; sp[1]=w; TOS=w;
10: \ The store is not superfluous although the earlier opt. would think so
11: \ Alternatively: sp[0]=TOS; w=TOS; sp-=1; TOS=w;
12: \ 2) ( -- .. ): sp[0] = TOS; ... /* This additional store is necessary */
13: \ 3) ( .. -- ): ... TOS = sp[0]; /* as well as this load */
14: \ 4) ( -- ): /* but here they are unnecessary */
15: \ 5) Words that call NEXT themselves have to be done very carefully.
16: \
17: \ To do:
18: \ add the store optimization for doubles
19: \ regarding problem 1 above: It would be better (for over) to implement
20: \ the alternative
21:
22: warnings off
23:
24: [IFUNDEF] vocabulary include search-order.fs [THEN]
25: [IFUNDEF] environment? include environ.fs [THEN]
26: include gray.fs
27:
28: 100 constant max-effect \ number of things on one side of a stack effect
29: 4096 constant batch-size \ no meaning, just make sure it's >0
30: 255 constant maxchar
31: maxchar 1+ constant eof-char
32: 9 constant tab-char
33: 10 constant nl-char
34:
35: : read-whole-file ( c-addr1 file-id -- c-addr2 )
36: \ reads the contents of the file file-id puts it into memory at c-addr1
37: \ c-addr2 is the first address after the file block
38: begin ( c-addr file-id )
39: 2dup batch-size swap read-file
40: if
41: true abort" I/O error"
42: endif
43: ( c-addr file-id actual-size ) rot over + -rot
44: batch-size <>
45: until
46: drop ;
47:
48: variable input \ pointer to next character to be parsed
49: variable endinput \ pointer to the end of the input (the char after the last)
50:
51: : start ( -- addr )
52: input @ ;
53:
54: : end ( addr -- addr u )
55: input @ over - ;
56:
57: variable output \ xt ( -- ) of output word
58:
59: : printprim ( -- )
60: output @ execute ;
61:
62: : field
63: <builds-field ( n1 n2 -- n3 )
64: does> ( addr1 -- addr2 )
65: @ + ;
66:
67: : const-field
68: <builds-field ( n1 n2 -- n3 )
69: does> ( addr -- w )
70: @ + @ ;
71:
72: struct
73: 2 cells field item-name
74: cell field item-d-offset
75: cell field item-f-offset
76: cell field item-type
77: constant item-descr
78:
79: 2variable forth-name
80: 2variable wordset
81: 2variable c-name
82: 2variable doc
83: 2variable c-code
84: 2variable forth-code
85: 2variable stack-string
86: create effect-in max-effect item-descr * allot
87: create effect-out max-effect item-descr * allot
88: variable effect-in-end ( pointer )
89: variable effect-out-end ( pointer )
90: 2variable effect-in-size
91: 2variable effect-out-size
92:
93: variable primitive-number -9 primitive-number !
94:
95: \ for several reasons stack items of a word are stored in a wordlist
96: \ since neither forget nor marker are implemented yet, we make a new
97: \ wordlist for every word and store it in the variable items
98: variable items
99:
100: \ a few more set ops
101:
102: : bit-equivalent ( w1 w2 -- w3 )
103: xor invert ;
104:
105: : complement ( set1 -- set2 )
106: empty ['] bit-equivalent binary-set-operation ;
107:
108: \ the parser
109:
110: eof-char max-member \ the whole character set + EOF
111:
112: : getinput ( -- n )
113: input @
114: dup endinput @ =
115: if
116: drop eof-char
117: else
118: c@
119: endif ;
120:
121: :noname ( n -- )
122: dup bl > if
123: emit space
124: else
125: .
126: endif ;
127: print-token !
128:
129: : testchar? ( set -- f )
130: getinput member? ;
131: ' testchar? test-vector !
132:
133: : ?nextchar ( f -- )
134: ?not? if
135: ." syntax error" cr
136: getinput . cr
137: input @ endinput @ over - 100 min type cr
138: abort
139: endif
140: input @ endinput @ <> if
141: 1 input +!
142: endif ;
143:
144: : charclass ( set "name" -- )
145: ['] ?nextchar terminal ;
146:
147: : .. ( c1 c2 -- set )
148: ( creates a set that includes the characters c, c1<=c<=c2 )
149: empty copy-set
150: swap 1+ rot do
151: i over add-member
152: loop ;
153:
154: : ` ( -- terminal ) ( use: ` c )
155: ( creates anonymous terminal for the character c )
156: [compile] ascii singleton ['] ?nextchar make-terminal ;
157:
158: char a char z .. char A char Z .. union char _ singleton union charclass letter
159: char 0 char 9 .. charclass digit
160: bl singleton charclass blank
161: tab-char singleton charclass tab
162: nl-char singleton eof-char over add-member complement charclass nonl
163: nl-char singleton eof-char over add-member char : over add-member complement charclass nocolonnl
164: bl 1+ maxchar .. charclass nowhite
165: char " singleton eof-char over add-member complement charclass noquote
166: nl-char singleton charclass nl
167: eof-char singleton charclass eof
168:
169:
170: (( letter (( letter || digit )) **
171: )) <- c-name ( -- )
172:
173: nowhite ++
174: <- name ( -- )
175:
176: (( ` \ nonl ** nl
177: )) <- comment ( -- )
178:
179: (( {{ effect-in }} (( {{ start }} c-name {{ end 2 pick item-name 2! item-descr + }} blank ** )) ** {{ effect-in-end ! }}
180: ` - ` - blank **
181: {{ effect-out }} (( {{ start }} c-name {{ end 2 pick item-name 2! item-descr + }} blank ** )) ** {{ effect-out-end ! }}
182: )) <- stack-effect ( -- )
183:
184: (( {{ s" " doc 2! s" " forth-code 2! }}
185: (( comment || nl )) **
186: (( {{ start }} name {{ end 2dup forth-name 2! c-name 2! }} tab ++
187: {{ start }} stack-effect {{ end stack-string 2! }} tab ++
188: {{ start }} name {{ end wordset 2! }} tab **
189: (( {{ start }} c-name {{ end c-name 2! }} )) ?? nl
190: ))
191: (( ` " ` " {{ start }} (( noquote ++ ` " )) ++ {{ end 1- doc 2! }} ` " nl )) ??
192: {{ start }} (( nocolonnl nonl ** nl )) ** {{ end c-code 2! }}
193: (( ` : nl
194: {{ start }} (( nonl ++ nl )) ++ {{ end forth-code 2! }}
195: )) ??
196: (( nl || eof ))
197: )) <- primitive ( -- )
198:
199: (( (( primitive {{ printprim }} )) ** eof ))
200: parser primitives2something
201: warnings @ [IF]
202: .( parser generated ok ) cr
203: [THEN]
204:
205: : primfilter ( file-id xt -- )
206: \ fileid is for the input file, xt ( -- ) is for the output word
207: output !
208: here input !
209: here swap read-whole-file
210: dup endinput !
211: here - allot
212: align
213: primitives2something ;
214:
215: \ types
216:
217: struct
218: 2 cells field type-c-name
219: cell const-field type-d-size
220: cell const-field type-f-size
221: cell const-field type-fetch-handler
222: cell const-field type-store-handler
223: constant type-description
224:
225: : data-stack-access ( n1 n2 n3 -- )
226: \ n1 is the offset of the accessed item, n2, n3 are effect-*-size
227: drop swap - 1- dup
228: if
229: ." sp[" 0 .r ." ]"
230: else
231: drop ." TOS"
232: endif ;
233:
234: : fp-stack-access ( n1 n2 n3 -- )
235: \ n1 is the offset of the accessed item, n2, n3 are effect-*-size
236: nip swap - 1- dup
237: if
238: ." fp[" 0 .r ." ]"
239: else
240: drop ." FTOS"
241: endif ;
242:
243: : fetch-single ( item -- )
244: >r
245: r@ item-name 2@ type
246: ." = ("
247: r@ item-type @ type-c-name 2@ type ." ) "
248: r@ item-d-offset @ effect-in-size 2@ data-stack-access ." ;" cr
249: rdrop ;
250:
251: : fetch-double ( item -- )
252: >r
253: r@ item-name 2@ type
254: ." = ({Double_Store _d; _d.cells.low = "
255: r@ item-d-offset @ dup effect-in-size 2@ data-stack-access
256: ." ; _d.cells.high = " 1+ effect-in-size 2@ data-stack-access
257: ." ; _d.dcell;});" cr
258: rdrop ;
259:
260: : fetch-float ( item -- )
261: >r
262: r@ item-name 2@ type
263: ." = "
264: \ ." (" r@ item-type @ type-c-name 2@ type ." ) "
265: r@ item-f-offset @ effect-in-size 2@ fp-stack-access ." ;" cr
266: rdrop ;
267:
268: : d-same-as-in? ( item -- f )
269: \ f is true iff the offset of item is the same as on input
270: >r
271: r@ item-name 2@ items @ search-wordlist 0=
272: abort" bug"
273: execute @
274: dup r@ =
275: if \ item first appeared in output
276: drop false
277: else
278: item-d-offset @ r@ item-d-offset @ =
279: endif
280: rdrop ;
281:
282: : is-in-tos? ( item -- f )
283: \ true if item has the same offset as the input TOS
284: item-d-offset @ 1+ effect-in-size 2@ drop = ;
285:
286: : really-store-single ( item -- )
287: >r
288: r@ item-d-offset @ effect-out-size 2@ data-stack-access ." = (Cell)"
289: r@ item-name 2@ type ." ;"
290: rdrop ;
291:
292: : store-single ( item -- )
293: >r
294: r@ d-same-as-in?
295: if
296: r@ is-in-tos?
297: if
298: ." IF_TOS(" r@ really-store-single ." );" cr
299: endif
300: else
301: r@ really-store-single cr
302: endif
303: rdrop ;
304:
305: : store-double ( item -- )
306: \ !! store optimization is not performed, because it is not yet needed
307: >r
308: ." {Double_Store _d; _d.dcell = " r@ item-name 2@ type ." ; "
309: r@ item-d-offset @ dup effect-out-size 2@ data-stack-access
310: ." = _d.cells.low; " 1+ effect-out-size 2@ data-stack-access
311: ." = _d.cells.high;}" cr
312: rdrop ;
313:
314: : f-same-as-in? ( item -- f )
315: \ f is true iff the offset of item is the same as on input
316: >r
317: r@ item-name 2@ items @ search-wordlist 0=
318: abort" bug"
319: execute @
320: dup r@ =
321: if \ item first appeared in output
322: drop false
323: else
324: item-f-offset @ r@ item-f-offset @ =
325: endif
326: rdrop ;
327:
328: : is-in-ftos? ( item -- f )
329: \ true if item has the same offset as the input TOS
330: item-f-offset @ 1+ effect-in-size 2@ nip = ;
331:
332: : really-store-float ( item -- )
333: >r
334: r@ item-f-offset @ effect-out-size 2@ fp-stack-access ." = "
335: r@ item-name 2@ type ." ;"
336: rdrop ;
337:
338: : store-float ( item -- )
339: >r
340: r@ f-same-as-in?
341: if
342: r@ is-in-ftos?
343: if
344: ." IF_FTOS(" r@ really-store-float ." );" cr
345: endif
346: else
347: r@ really-store-float cr
348: endif
349: rdrop ;
350:
351: : single-type ( -- xt1 xt2 n1 n2 )
352: ['] fetch-single ['] store-single 1 0 ;
353:
354: : double-type ( -- xt1 xt2 n1 n2 )
355: ['] fetch-double ['] store-double 2 0 ;
356:
357: : float-type ( -- xt1 xt2 n1 n2 )
358: ['] fetch-float ['] store-float 0 1 ;
359:
360: : s, ( addr u -- )
361: \ allocate a string
362: here swap dup allot move ;
363:
364: : starts-with ( addr u xt1 xt2 n1 n2 "prefix" -- )
365: \ describes a type
366: \ addr u specifies the C type name
367: \ n1 is the size of the type on the data stack
368: \ n2 is the size of the type on the FP stack
369: \ stack effect entries of the type start with prefix
370: >r >r >r >r
371: dup >r here >r s,
372: create
373: r> r> 2,
374: r> r> r> , r> , swap , , ;
375:
376: wordlist constant types
377: get-current
378: types set-current
379:
380: s" Bool" single-type starts-with f
381: s" Char" single-type starts-with c
382: s" Cell" single-type starts-with n
383: s" Cell" single-type starts-with w
384: s" UCell" single-type starts-with u
385: s" DCell" double-type starts-with d
386: s" UDCell" double-type starts-with ud
387: s" Float" float-type starts-with r
388: s" Cell *" single-type starts-with a_
389: s" Char *" single-type starts-with c_
390: s" Float *" single-type starts-with f_
391: s" DFloat *" single-type starts-with df_
392: s" SFloat *" single-type starts-with sf_
393: s" Xt" single-type starts-with xt
394: s" WID" single-type starts-with wid
395: s" F83Name *" single-type starts-with f83name
396:
397: set-current
398:
399: : get-type ( addr1 u1 -- type-descr )
400: \ get the type of the name in addr1 u1
401: \ type-descr is a pointer to a type-descriptor
402: 0 swap ?do
403: dup i types search-wordlist
404: if \ ok, we have the type ( addr1 xt )
405: execute nip
406: UNLOOP EXIT
407: endif
408: -1 s+loop
409: \ we did not find a type, abort
410: true abort" unknown type prefix" ;
411:
412: : declare ( addr "name" -- )
413: \ remember that there is a stack item at addr called name
414: create , ;
415:
416: : declaration ( item -- )
417: dup item-name 2@ items @ search-wordlist
418: if \ already declared ( item xt )
419: execute @ item-type @ swap item-type !
420: else ( addr )
421: dup item-name 2@ nextname dup declare ( addr )
422: dup >r item-name 2@ 2dup get-type ( addr1 u type-descr )
423: dup r> item-type ! ( addr1 u type-descr )
424: type-c-name 2@ type space type ." ;" cr
425: endif ;
426:
427: : declaration-list ( addr1 addr2 -- )
428: swap ?do
429: i declaration
430: item-descr +loop ;
431:
432: : fetch ( addr -- )
433: dup item-type @ type-fetch-handler execute ;
434:
435: : declarations ( -- )
436: wordlist dup items ! set-current
437: effect-in effect-in-end @ declaration-list
438: effect-out effect-out-end @ declaration-list ;
439:
440: \ offset computation
441: \ the leftmost (i.e. deepest) item has offset 0
442: \ the rightmost item has the highest offset
443:
444: : compute-offset ( n1 n2 item -- n3 n4 )
445: \ n1, n3 are data-stack-offsets
446: \ n2, n4 are the fp-stack-offsets
447: >r
448: swap dup r@ item-d-offset !
449: r@ item-type @ type-d-size +
450: swap dup r@ item-f-offset !
451: r@ item-type @ type-f-size +
452: rdrop ;
453:
454: : compute-list ( addr1 addr2 -- n1 n2 )
455: \ n1, n2 are the final offsets
456: 0 0 2swap swap ?do
457: i compute-offset
458: item-descr +loop ;
459:
460: : compute-offsets ( -- )
461: effect-in effect-in-end @ compute-list effect-in-size 2!
462: effect-out effect-out-end @ compute-list effect-out-size 2! ;
463:
464: : flush-tos ( -- )
465: effect-in-size 2@ effect-out-size 2@
466: 0<> rot 0= and
467: if
468: ." IF_FTOS(fp[0] = FTOS);" cr
469: endif
470: 0<> swap 0= and
471: if
472: ." IF_TOS(sp[0] = TOS);" cr
473: endif ;
474:
475: : fill-tos ( -- )
476: effect-in-size 2@ effect-out-size 2@
477: 0= rot 0<> and
478: if
479: ." IF_FTOS(FTOS = fp[0]);" cr
480: endif
481: 0= swap 0<> and
482: if
483: ." IF_TOS(TOS = sp[0]);" cr
484: endif ;
485:
486: : fetches ( -- )
487: effect-in-end @ effect-in ?do
488: i fetch
489: item-descr +loop ;
490:
491: : stack-pointer-updates ( -- )
492: \ we need not check if an update is a noop; gcc does this for us
493: effect-in-size 2@
494: effect-out-size 2@
495: rot swap - ( d-in d-out f-diff )
496: rot rot - ( f-diff d-diff )
497: ?dup IF ." sp += " 0 .r ." ;" cr THEN
498: ?dup IF ." fp += " 0 .r ." ;" cr THEN ;
499:
500: : store ( item -- )
501: \ f is true if the item should be stored
502: \ f is false if the store is probably not necessary
503: dup item-type @ type-store-handler execute ;
504:
505: : stores ( -- )
506: effect-out-end @ effect-out ?do
507: i store
508: item-descr +loop ;
509:
510: : .stack-list ( start end -- )
511: swap ?do
512: i item-name 2@ type space
513: item-descr +loop ;
514:
515: : output-c ( -- )
516: ." I_" c-name 2@ type ." : /* " forth-name 2@ type ." ( " stack-string 2@ type ." ) */" cr
517: ." /* " doc 2@ type ." */" cr
518: ." {" cr
519: ." DEF_CA" cr
520: declarations
521: compute-offsets \ for everything else
522: flush-tos
523: fetches
524: stack-pointer-updates cr
525: ." NAME(" [char] " emit forth-name 2@ type [char] " emit ." )" cr \ debugging
526: ." {" cr
527: c-code 2@ type
528: ." }" cr
529: ." NEXT_P1;" cr
530: stores
531: fill-tos
532: ." NEXT_P2;" cr
533: ." }" cr
534: cr
535: ;
536:
537: : output-label ( -- )
538: ." &&I_" c-name 2@ type ." ," cr ;
539:
540: : output-alias ( -- )
541: primitive-number @ . ." alias " forth-name 2@ type cr
542: -1 primitive-number +! ;
543:
544: : output-forth ( -- )
545: forth-code @ 0=
546: IF output-alias
547: ELSE ." : " forth-name 2@ type ." ( "
548: effect-in effect-in-end @ .stack-list ." -- "
549: effect-out effect-out-end @ .stack-list ." )" cr
550: forth-code 2@ type cr
551: -1 primitive-number +!
552: THEN ;
553:
554: [IFDEF] documentation
555: : register-doc ( -- )
556: get-current documentation set-current
557: forth-name 2@ nextname create
558: forth-name 2@ 2,
559: stack-string 2@ 2,
560: wordset 2@ 2,
561: c-name 2@ 2,
562: doc 2@ 2,
563: set-current ;
564: [THEN]
565:
566: : process-file ( addr u xt -- )
567: >r r/o open-file abort" cannot open file"
568: warnings @ if
569: ." ------------ CUT HERE -------------" cr endif
570: r> primfilter ;
571:
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