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