Annotation of gforth/kernel/comp.fs, revision 1.105
1.1 pazsan 1: \ compiler definitions 14sep97jaw
2:
1.98 anton 3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
1.6 anton 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
1.93 anton 9: \ as published by the Free Software Foundation, either version 3
1.6 anton 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
1.93 anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.6 anton 19:
1.1 pazsan 20: \ \ Revisions-Log
21:
22: \ put in seperate file 14sep97jaw
23:
24: \ \ here allot , c, A, 17dec92py
25:
1.14 jwilke 26: [IFUNDEF] allot
27: [IFUNDEF] forthstart
28: : allot ( n -- ) \ core
29: dup unused u> -8 and throw
30: dp +! ;
31: [THEN]
32: [THEN]
33:
34: \ we default to this version if we have nothing else 05May99jaw
35: [IFUNDEF] allot
1.1 pazsan 36: : allot ( n -- ) \ core
1.23 anton 37: \G Reserve @i{n} address units of data space without
38: \G initialization. @i{n} is a signed number, passing a negative
39: \G @i{n} releases memory. In ANS Forth you can only deallocate
40: \G memory from the current contiguous region in this way. In
41: \G Gforth you can deallocate anything in this way but named words.
42: \G The system does not check this restriction.
1.12 anton 43: here +
44: dup 1- usable-dictionary-end forthstart within -8 and throw
45: dp ! ;
1.14 jwilke 46: [THEN]
1.1 pazsan 47:
1.22 crook 48: : c, ( c -- ) \ core c-comma
1.15 crook 49: \G Reserve data space for one char and store @i{c} in the space.
1.84 pazsan 50: here 1 chars allot [ has? flash [IF] ] flashc! [ [ELSE] ] c! [ [THEN] ] ;
1.1 pazsan 51:
1.22 crook 52: : , ( w -- ) \ core comma
1.15 crook 53: \G Reserve data space for one cell and store @i{w} in the space.
1.84 pazsan 54: here cell allot [ has? flash [IF] ] flash! [ [ELSE] ] ! [ [THEN] ] ;
1.1 pazsan 55:
56: : 2, ( w1 w2 -- ) \ gforth
1.15 crook 57: \G Reserve data space for two cells and store the double @i{w1
1.24 anton 58: \G w2} there, @i{w2} first (lower address).
1.84 pazsan 59: here 2 cells allot [ has? flash [IF] ] tuck flash! cell+ flash!
60: [ [ELSE] ] 2! [ [THEN] ] ;
1.1 pazsan 61:
62: \ : aligned ( addr -- addr' ) \ core
63: \ [ cell 1- ] Literal + [ -1 cells ] Literal and ;
64:
65: : align ( -- ) \ core
1.15 crook 66: \G If the data-space pointer is not aligned, reserve enough space to align it.
1.1 pazsan 67: here dup aligned swap ?DO bl c, LOOP ;
68:
1.22 crook 69: \ : faligned ( addr -- f-addr ) \ float f-aligned
1.1 pazsan 70: \ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
71:
1.22 crook 72: : falign ( -- ) \ float f-align
1.15 crook 73: \G If the data-space pointer is not float-aligned, reserve
74: \G enough space to align it.
1.1 pazsan 75: here dup faligned swap
76: ?DO
77: bl c,
78: LOOP ;
79:
1.9 anton 80: : maxalign ( -- ) \ gforth
1.23 anton 81: \G Align data-space pointer for all alignment requirements.
1.1 pazsan 82: here dup maxaligned swap
83: ?DO
84: bl c,
85: LOOP ;
86:
87: \ the code field is aligned if its body is maxaligned
88: ' maxalign Alias cfalign ( -- ) \ gforth
1.24 anton 89: \G Align data-space pointer for code field requirements (i.e., such
90: \G that the corresponding body is maxaligned).
1.1 pazsan 91:
92: ' , alias A, ( addr -- ) \ gforth
93:
94: ' NOOP ALIAS const
95:
96: \ \ Header 23feb93py
97:
98: \ input-stream, nextname and noname are quite ugly (passing
99: \ information through global variables), but they are useful for dealing
100: \ with existing/independent defining words
101:
102: defer (header)
103: defer header ( -- ) \ gforth
104: ' (header) IS header
105:
106: : string, ( c-addr u -- ) \ gforth
107: \G puts down string as cstring
1.83 pazsan 108: dup [ has? rom [IF] ] $E0 [ [ELSE] ] alias-mask [ [THEN] ] or c,
1.84 pazsan 109: [ has? flash [IF] ]
110: bounds ?DO I c@ c, LOOP
111: [ [ELSE] ]
112: here swap chars dup allot move
113: [ [THEN] ] ;
1.1 pazsan 114:
1.30 anton 115: : longstring, ( c-addr u -- ) \ gforth
1.55 anton 116: \G puts down string as longcstring
1.30 anton 117: dup , here swap chars dup allot move ;
118:
1.99 pazsan 119: [IFDEF] prelude-mask
1.96 anton 120: variable next-prelude
121:
122: : prelude, ( -- )
123: next-prelude @ if
124: align next-prelude @ ,
125: then ;
1.99 pazsan 126: [THEN]
1.96 anton 127:
1.1 pazsan 128: : header, ( c-addr u -- ) \ gforth
129: name-too-long?
1.53 anton 130: dup max-name-length @ max max-name-length !
1.99 pazsan 131: [ [IFDEF] prelude-mask ] prelude, [ [THEN] ]
1.1 pazsan 132: align here last !
1.94 pazsan 133: [ has? ec [IF] ]
1.83 pazsan 134: -1 A,
135: [ [ELSE] ]
1.1 pazsan 136: current @ 1 or A, \ link field; before revealing, it contains the
137: \ tagged reveal-into wordlist
1.83 pazsan 138: [ [THEN] ]
1.78 pazsan 139: [ has? f83headerstring [IF] ]
140: string,
141: [ [ELSE] ]
1.83 pazsan 142: longstring, alias-mask lastflags cset
1.96 anton 143: next-prelude @ 0<> prelude-mask and lastflags cset
144: next-prelude off
1.78 pazsan 145: [ [THEN] ]
1.83 pazsan 146: cfalign ;
1.1 pazsan 147:
148: : input-stream-header ( "name" -- )
1.80 pazsan 149: parse-name name-too-short? header, ;
1.1 pazsan 150:
151: : input-stream ( -- ) \ general
152: \G switches back to getting the name from the input stream ;
153: ['] input-stream-header IS (header) ;
154:
155: ' input-stream-header IS (header)
156:
1.32 anton 157: 2variable nextname-string
1.1 pazsan 158:
1.33 pazsan 159: has? OS [IF]
1.1 pazsan 160: : nextname-header ( -- )
1.32 anton 161: nextname-string 2@ header,
162: nextname-string free-mem-var
1.1 pazsan 163: input-stream ;
1.33 pazsan 164: [THEN]
1.1 pazsan 165:
166: \ the next name is given in the string
167:
1.33 pazsan 168: has? OS [IF]
1.1 pazsan 169: : nextname ( c-addr u -- ) \ gforth
1.19 anton 170: \g The next defined word will have the name @var{c-addr u}; the
171: \g defining word will leave the input stream alone.
1.1 pazsan 172: name-too-long?
1.32 anton 173: nextname-string free-mem-var
174: save-mem nextname-string 2!
1.1 pazsan 175: ['] nextname-header IS (header) ;
1.33 pazsan 176: [THEN]
1.1 pazsan 177:
178: : noname-header ( -- )
179: 0 last ! cfalign
180: input-stream ;
181:
182: : noname ( -- ) \ gforth
1.19 anton 183: \g The next defined word will be anonymous. The defining word will
184: \g leave the input stream alone. The xt of the defined word will
1.56 anton 185: \g be given by @code{latestxt}.
1.1 pazsan 186: ['] noname-header IS (header) ;
187:
1.56 anton 188: : latestxt ( -- xt ) \ gforth
1.15 crook 189: \G @i{xt} is the execution token of the last word defined.
1.13 crook 190: \ The main purpose of this word is to get the xt of words defined using noname
1.1 pazsan 191: lastcfa @ ;
192:
1.56 anton 193: ' latestxt alias lastxt \ gforth-obsolete
194: \G old name for @code{latestxt}.
195:
196: : latest ( -- nt ) \ gforth
197: \G @var{nt} is the name token of the last word defined; it is 0 if the
198: \G last word has no name.
199: last @ ;
200:
1.1 pazsan 201: \ \ literals 17dec92py
202:
203: : Literal ( compilation n -- ; run-time -- n ) \ core
1.27 anton 204: \G Compilation semantics: compile the run-time semantics.@*
205: \G Run-time Semantics: push @i{n}.@*
206: \G Interpretation semantics: undefined.
1.14 jwilke 207: [ [IFDEF] lit, ]
208: lit,
209: [ [ELSE] ]
1.27 anton 210: postpone lit ,
1.14 jwilke 211: [ [THEN] ] ; immediate restrict
1.1 pazsan 212:
1.72 anton 213: : 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal
214: \G Compile appropriate code such that, at run-time, @i{w1 w2} are
215: \G placed on the stack. Interpretation semantics are undefined.
216: swap postpone Literal postpone Literal ; immediate restrict
217:
1.1 pazsan 218: : ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth
1.14 jwilke 219: [ [IFDEF] alit, ]
220: alit,
221: [ [ELSE] ]
222: postpone lit A,
223: [ [THEN] ] ; immediate restrict
1.1 pazsan 224:
1.70 pazsan 225: Defer char@ ( addr u -- char addr' u' )
226: :noname over c@ -rot 1 /string ; IS char@
227:
1.8 crook 228: : char ( '<spaces>ccc' -- c ) \ core
1.15 crook 229: \G Skip leading spaces. Parse the string @i{ccc} and return @i{c}, the
230: \G display code representing the first character of @i{ccc}.
1.87 pazsan 231: parse-name char@ 2drop ;
1.1 pazsan 232:
1.8 crook 233: : [char] ( compilation '<spaces>ccc' -- ; run-time -- c ) \ core bracket-char
1.10 crook 234: \G Compilation: skip leading spaces. Parse the string
1.15 crook 235: \G @i{ccc}. Run-time: return @i{c}, the display code
236: \G representing the first character of @i{ccc}. Interpretation
1.10 crook 237: \G semantics for this word are undefined.
1.1 pazsan 238: char postpone Literal ; immediate restrict
239:
240: \ \ threading 17mar93py
241:
242: : cfa, ( code-address -- ) \ gforth cfa-comma
243: here
244: dup lastcfa !
1.84 pazsan 245: [ has? rom [IF] ] 2 cells allot [ [ELSE] ] 0 A, 0 , [ [THEN] ]
246: code-address! ;
1.1 pazsan 247:
1.14 jwilke 248: [IFUNDEF] compile,
1.34 anton 249: defer compile, ( xt -- ) \ core-ext compile-comma
250: \G Compile the word represented by the execution token @i{xt}
251: \G into the current definition.
252:
253: ' , is compile,
1.14 jwilke 254: [THEN]
1.1 pazsan 255:
1.80 pazsan 256: has? ec 0= [IF]
1.40 anton 257: defer basic-block-end ( -- )
258:
1.60 anton 259: :noname ( -- )
260: 0 compile-prim1 ;
261: is basic-block-end
1.80 pazsan 262: [THEN]
1.40 anton 263:
1.99 pazsan 264: has? primcentric [IF]
265: has? peephole [IF]
266: \ dynamic only
267: : peephole-compile, ( xt -- )
268: \ compile xt, appending its code to the current dynamic superinstruction
269: here swap , compile-prim1 ;
270: [ELSE]
271: : peephole-compile, ( xt -- addr ) @ , ;
272: [THEN]
1.40 anton 273:
1.35 anton 274: : compile-to-prims, ( xt -- )
275: \G compile xt to use primitives (and their peephole optimization)
276: \G instead of ","-ing the xt.
277: \ !! all POSTPONEs here postpone primitives; this can be optimized
1.39 pazsan 278: dup >does-code if
1.66 anton 279: ['] does-exec peephole-compile, , EXIT
280: \ dup >body POSTPONE literal ['] call peephole-compile, >does-code , EXIT
1.35 anton 281: then
282: dup >code-address CASE
1.91 pazsan 283: dovalue: OF >body ['] lit@ peephole-compile, , EXIT ENDOF
284: docon: OF >body @ ['] lit peephole-compile, , EXIT ENDOF
1.66 anton 285: \ docon: OF >body POSTPONE literal ['] @ peephole-compile, EXIT ENDOF
1.42 anton 286: \ docon is also used by VALUEs, so don't @ at compile time
1.66 anton 287: docol: OF >body ['] call peephole-compile, , EXIT ENDOF
288: dovar: OF >body ['] lit peephole-compile, , EXIT ENDOF
289: douser: OF >body @ ['] useraddr peephole-compile, , EXIT ENDOF
290: dodefer: OF >body ['] lit-perform peephole-compile, , EXIT ENDOF
291: dofield: OF >body @ ['] lit+ peephole-compile, , EXIT ENDOF
1.103 anton 292: \ dofield: OF >body @ POSTPONE literal ['] + peephole-compile, EXIT ENDOF
1.100 dvdkhlng 293: doabicode: OF >body ['] abi-call peephole-compile, , EXIT ENDOF
1.103 anton 294: do;abicode: OF ['] ;abi-code-exec peephole-compile, , EXIT ENDOF
1.104 anton 295: \ code words and ;code-defined words (code words could be
296: \ optimized, if we could identify them):
1.105 ! anton 297: dup in-dictionary? IF ( xt code-address )
! 298: over >body = if ( xt )
! 299: \ definitely a CODE word
! 300: peephole-compile, EXIT THEN
! 301: \ not sure, might be a ;CODE word
! 302: ['] lit-execute peephole-compile, , EXIT
1.104 anton 303: \ drop POSTPONE literal ['] execute peephole-compile, EXIT
304: THEN
1.35 anton 305: ENDCASE
1.49 anton 306: peephole-compile, ;
1.35 anton 307:
308: ' compile-to-prims, IS compile,
1.36 pazsan 309: [ELSE]
310: ' , is compile,
311: [THEN]
1.34 anton 312:
1.1 pazsan 313: : !does ( addr -- ) \ gforth store-does
1.56 anton 314: latestxt does-code! ;
1.1 pazsan 315:
1.102 pazsan 316: \ : (does>) ( R: addr -- )
317: \ r> cfaligned /does-handler + !does ; \ !! no gforth-native
318:
319: \ \ !! unused, but ifdefed/gosted in some places
320: \ : (does>2) ( addr -- )
321: \ cfaligned /does-handler + !does ;
1.64 anton 322:
1.61 pazsan 323: : (compile) ( -- ) \ gforth-obsolete: dummy
1.63 anton 324: true abort" (compile) doesn't work, use POSTPONE instead" ;
1.1 pazsan 325:
326: \ \ ticks
327:
1.90 anton 328: : name>comp ( nt -- w xt ) \ gforth name-to-comp
1.15 crook 329: \G @i{w xt} is the compilation token for the word @i{nt}.
1.1 pazsan 330: (name>comp)
331: 1 = if
332: ['] execute
333: else
334: ['] compile,
335: then ;
336:
337: : [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick
338: (') postpone ALiteral ; immediate restrict
339:
340: : ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick
1.15 crook 341: \g @i{xt} represents @i{name}'s interpretation
342: \g semantics. Perform @code{-14 throw} if the word has no
1.1 pazsan 343: \g interpretation semantics.
344: ' postpone ALiteral ; immediate restrict
345:
1.5 anton 346: : COMP' ( "name" -- w xt ) \ gforth comp-tick
1.15 crook 347: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 348: (') name>comp ;
349:
350: : [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick
1.15 crook 351: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 352: COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict
353:
1.18 jwilke 354: : postpone, ( w xt -- ) \ gforth postpone-comma
1.26 anton 355: \g Compile the compilation semantics represented by the
356: \g compilation token @i{w xt}.
1.18 jwilke 357: dup ['] execute =
358: if
359: drop compile,
360: else
1.61 pazsan 361: swap POSTPONE aliteral compile,
1.18 jwilke 362: then ;
363:
364: : POSTPONE ( "name" -- ) \ core
365: \g Compiles the compilation semantics of @i{name}.
1.48 anton 366: COMP' postpone, ; immediate
1.18 jwilke 367:
1.1 pazsan 368: \ \ recurse 17may93jaw
369:
370: : recurse ( compilation -- ; run-time ?? -- ?? ) \ core
1.10 crook 371: \g Call the current definition.
1.56 anton 372: latestxt compile, ; immediate restrict
1.1 pazsan 373:
374: \ \ compiler loop
375:
1.72 anton 376: : compiler1 ( c-addr u -- ... xt )
1.99 pazsan 377: 2dup find-name [ [IFDEF] prelude-mask ] run-prelude [ [THEN] ] dup
1.1 pazsan 378: if ( c-addr u nt )
1.72 anton 379: nip nip name>comp
1.1 pazsan 380: else
381: drop
1.72 anton 382: 2dup 2>r snumber? dup
1.1 pazsan 383: IF
384: 0>
385: IF
1.72 anton 386: ['] 2literal
387: ELSE
388: ['] literal
1.1 pazsan 389: THEN
1.72 anton 390: 2rdrop
1.1 pazsan 391: ELSE
1.72 anton 392: drop 2r> compiler-notfound1
1.1 pazsan 393: THEN
394: then ;
395:
1.22 crook 396: : [ ( -- ) \ core left-bracket
1.8 crook 397: \G Enter interpretation state. Immediate word.
1.72 anton 398: ['] interpreter1 IS parser1 state off ; immediate
1.1 pazsan 399:
400: : ] ( -- ) \ core right-bracket
1.8 crook 401: \G Enter compilation state.
1.72 anton 402: ['] compiler1 IS parser1 state on ;
1.1 pazsan 403:
404: \ \ Strings 22feb93py
405:
1.44 anton 406: : S, ( addr u -- )
1.45 anton 407: \ allot string as counted string
1.84 pazsan 408: [ has? flash [IF] ]
409: dup c, bounds ?DO I c@ c, LOOP
410: [ [ELSE] ]
411: here over char+ allot place align
412: [ [THEN] ] ;
1.45 anton 413:
414: : mem, ( addr u -- )
415: \ allot the memory block HERE (do alignment yourself)
1.84 pazsan 416: [ has? flash [IF] ]
417: bounds ?DO I c@ c, LOOP
418: [ [ELSE] ]
419: here over allot swap move
420: [ [THEN] ] ;
1.1 pazsan 421:
1.44 anton 422: : ," ( "string"<"> -- )
423: [char] " parse s, ;
1.1 pazsan 424:
425: \ \ Header states 23feb93py
426:
1.83 pazsan 427: \ problematic only for big endian machines
428:
429: has? f83headerstring [IF]
430: : cset ( bmask c-addr -- )
431: tuck c@ or swap c! ;
432:
433: : creset ( bmask c-addr -- )
434: tuck c@ swap invert and swap c! ;
435:
436: : ctoggle ( bmask c-addr -- )
437: tuck c@ xor swap c! ;
438: [ELSE]
1.1 pazsan 439: : cset ( bmask c-addr -- )
1.30 anton 440: tuck @ or swap ! ;
1.1 pazsan 441:
442: : creset ( bmask c-addr -- )
1.30 anton 443: tuck @ swap invert and swap ! ;
1.1 pazsan 444:
445: : ctoggle ( bmask c-addr -- )
1.30 anton 446: tuck @ xor swap ! ;
1.83 pazsan 447: [THEN]
1.1 pazsan 448:
449: : lastflags ( -- c-addr )
450: \ the address of the flags byte in the last header
451: \ aborts if the last defined word was headerless
1.56 anton 452: latest dup 0= abort" last word was headerless" cell+ ;
1.1 pazsan 453:
454: : immediate ( -- ) \ core
1.10 crook 455: \G Make the compilation semantics of a word be to @code{execute}
456: \G the execution semantics.
1.83 pazsan 457: immediate-mask lastflags [ has? rom [IF] ] creset [ [ELSE] ] cset [ [THEN] ] ;
1.1 pazsan 458:
459: : restrict ( -- ) \ gforth
1.10 crook 460: \G A synonym for @code{compile-only}
1.83 pazsan 461: restrict-mask lastflags [ has? rom [IF] ] creset [ [ELSE] ] cset [ [THEN] ] ;
1.18 jwilke 462:
1.1 pazsan 463: ' restrict alias compile-only ( -- ) \ gforth
1.10 crook 464: \G Remove the interpretation semantics of a word.
1.1 pazsan 465:
466: \ \ Create Variable User Constant 17mar93py
467:
1.15 crook 468: : Alias ( xt "name" -- ) \ gforth
1.1 pazsan 469: Header reveal
470: alias-mask lastflags creset
471: dup A, lastcfa ! ;
472:
473: doer? :dovar [IF]
474:
475: : Create ( "name" -- ) \ core
476: Header reveal dovar: cfa, ;
477: [ELSE]
478:
479: : Create ( "name" -- ) \ core
480: Header reveal here lastcfa ! 0 A, 0 , DOES> ;
481: [THEN]
482:
1.85 pazsan 483: has? flash [IF]
1.87 pazsan 484: : (variable) dpp @ normal-dp = IF Create dpp @
1.85 pazsan 485: ELSE normal-dp @ Constant dpp @ ram THEN ;
486: : Variable ( "name" -- ) \ core
487: (Variable) 0 , dpp ! ;
488:
489: : AVariable ( "name" -- ) \ gforth
490: (Variable) 0 A, dpp ! ;
491:
492: : 2Variable ( "name" -- ) \ double two-variable
493: (Variable) 0 , 0 , dpp ! ;
494: [ELSE]
1.1 pazsan 495: : Variable ( "name" -- ) \ core
496: Create 0 , ;
497:
498: : AVariable ( "name" -- ) \ gforth
499: Create 0 A, ;
500:
1.22 crook 501: : 2Variable ( "name" -- ) \ double two-variable
1.85 pazsan 502: Create 0 , 0 , ;
503: [THEN]
1.1 pazsan 504:
1.75 pazsan 505: has? no-userspace 0= [IF]
1.21 crook 506: : uallot ( n -- ) \ gforth
507: udp @ swap udp +! ;
1.1 pazsan 508:
509: doer? :douser [IF]
510:
511: : User ( "name" -- ) \ gforth
512: Header reveal douser: cfa, cell uallot , ;
513:
514: : AUser ( "name" -- ) \ gforth
515: User ;
516: [ELSE]
517:
518: : User Create cell uallot , DOES> @ up @ + ;
519:
520: : AUser User ;
1.75 pazsan 521: [THEN]
1.1 pazsan 522: [THEN]
523:
524: doer? :docon [IF]
525: : (Constant) Header reveal docon: cfa, ;
526: [ELSE]
527: : (Constant) Create DOES> @ ;
528: [THEN]
529:
1.76 pazsan 530: doer? :dovalue [IF]
531: : (Value) Header reveal dovalue: cfa, ;
532: [ELSE]
533: has? rom [IF]
534: : (Value) Create DOES> @ @ ;
535: [ELSE]
536: : (Value) Create DOES> @ ;
537: [THEN]
538: [THEN]
539:
1.1 pazsan 540: : Constant ( w "name" -- ) \ core
1.15 crook 541: \G Define a constant @i{name} with value @i{w}.
1.1 pazsan 542: \G
1.15 crook 543: \G @i{name} execution: @i{-- w}
1.1 pazsan 544: (Constant) , ;
545:
546: : AConstant ( addr "name" -- ) \ gforth
547: (Constant) A, ;
548:
1.84 pazsan 549: has? flash [IF]
550: : Value ( w "name" -- ) \ core-ext
551: (Value) dpp @ >r here cell allot >r
552: ram here >r , r> r> flash! r> dpp ! ;
553:
554: ' Value alias AValue
555: [ELSE]
1.1 pazsan 556: : Value ( w "name" -- ) \ core-ext
1.76 pazsan 557: (Value) , ;
1.1 pazsan 558:
1.37 jwilke 559: : AValue ( w "name" -- ) \ core-ext
1.76 pazsan 560: (Value) A, ;
1.84 pazsan 561: [THEN]
1.37 jwilke 562:
1.22 crook 563: : 2Constant ( w1 w2 "name" -- ) \ double two-constant
1.1 pazsan 564: Create ( w1 w2 "name" -- )
565: 2,
566: DOES> ( -- w1 w2 )
567: 2@ ;
568:
569: doer? :dofield [IF]
570: : (Field) Header reveal dofield: cfa, ;
571: [ELSE]
572: : (Field) Create DOES> @ + ;
573: [THEN]
1.39 pazsan 574:
575: \ \ interpret/compile:
576:
577: struct
578: >body
579: cell% field interpret/compile-int
580: cell% field interpret/compile-comp
581: end-struct interpret/compile-struct
582:
583: : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth
584: Create immediate swap A, A,
585: DOES>
586: abort" executed primary cfa of an interpret/compile: word" ;
587: \ state @ IF cell+ THEN perform ;
588:
1.1 pazsan 589: \ IS Defer What's Defers TO 24feb93py
590:
1.68 anton 591: defer defer-default ( -- )
1.69 anton 592: ' abort is defer-default
593: \ default action for deferred words (overridden by a warning later)
1.67 anton 594:
1.1 pazsan 595: doer? :dodefer [IF]
596:
597: : Defer ( "name" -- ) \ gforth
1.67 anton 598: \G Define a deferred word @i{name}; its execution semantics can be
599: \G set with @code{defer!} or @code{is} (and they have to, before first
600: \G executing @i{name}.
1.1 pazsan 601: Header Reveal dodefer: cfa,
1.86 pazsan 602: [ has? rom [IF] ] here >r cell allot
603: dpp @ ram here r> flash! ['] defer-default A, dpp !
604: [ [ELSE] ] ['] defer-default A, [ [THEN] ] ;
1.18 jwilke 605:
1.1 pazsan 606: [ELSE]
607:
1.77 pazsan 608: has? rom [IF]
609: : Defer ( "name" -- ) \ gforth
1.86 pazsan 610: Create here >r cell allot
611: dpp @ ram here r> flash! ['] defer-default A, dpp !
1.77 pazsan 612: DOES> @ @ execute ;
613: [ELSE]
614: : Defer ( "name" -- ) \ gforth
615: Create ['] defer-default A,
616: DOES> @ execute ;
617: [THEN]
1.1 pazsan 618: [THEN]
619:
1.67 anton 620: : defer@ ( xt-deferred -- xt ) \ gforth defer-fetch
621: \G @i{xt} represents the word currently associated with the deferred
622: \G word @i{xt-deferred}.
1.86 pazsan 623: >body @ [ has? rom [IF] ] @ [ [THEN] ] ;
1.67 anton 624:
1.25 anton 625: : Defers ( compilation "name" -- ; run-time ... -- ... ) \ gforth
626: \G Compiles the present contents of the deferred word @i{name}
627: \G into the current definition. I.e., this produces static
628: \G binding as if @i{name} was not deferred.
1.67 anton 629: ' defer@ compile, ; immediate
1.18 jwilke 630:
1.103 anton 631: : does>-like ( xt -- )
632: \ xt ( addr -- ) is !does or !;abi-code etc, addr is the address
633: \ that should be stored right after the code address.
634: >r ;-hook ?struc
635: [ has? xconds [IF] ] exit-like [ [THEN] ]
636: here [ has? peephole [IF] ] 5 [ [ELSE] ] 4 [ [THEN] ] cells +
637: postpone aliteral r> compile, [compile] exit
638: [ has? peephole [IF] ] finish-code [ [THEN] ]
639: defstart ;
640:
1.18 jwilke 641: :noname
1.101 anton 642: here !does ]
1.18 jwilke 643: defstart :-hook ;
644: :noname
1.103 anton 645: ['] !does does>-like :-hook ;
1.18 jwilke 646: interpret/compile: DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does
647:
1.73 anton 648: : defer! ( xt xt-deferred -- ) \ gforth defer-store
1.67 anton 649: \G Changes the @code{defer}red word @var{xt-deferred} to execute @var{xt}.
1.86 pazsan 650: >body [ has? rom [IF] ] @ [ [THEN] ] ! ;
1.67 anton 651:
1.20 anton 652: : <IS> ( "name" xt -- ) \ gforth
653: \g Changes the @code{defer}red word @var{name} to execute @var{xt}.
1.67 anton 654: ' defer! ;
1.20 anton 655:
656: : [IS] ( compilation "name" -- ; run-time xt -- ) \ gforth bracket-is
657: \g At run-time, changes the @code{defer}red word @var{name} to
658: \g execute @var{xt}.
1.67 anton 659: ' postpone ALiteral postpone defer! ; immediate restrict
1.18 jwilke 660:
1.20 anton 661: ' <IS>
1.18 jwilke 662: ' [IS]
1.67 anton 663: interpret/compile: IS ( compilation/interpretation "name-deferred" -- ; run-time xt -- ) \ gforth
664: \G Changes the @code{defer}red word @var{name} to execute @var{xt}.
665: \G Its compilation semantics parses at compile time.
1.18 jwilke 666:
1.20 anton 667: ' <IS>
668: ' [IS]
669: interpret/compile: TO ( w "name" -- ) \ core-ext
1.18 jwilke 670:
671: : interpret/compile? ( xt -- flag )
672: >does-code ['] DOES> >does-code = ;
1.1 pazsan 673:
674: \ \ : ; 24feb93py
675:
676: defer :-hook ( sys1 -- sys2 )
677:
678: defer ;-hook ( sys2 -- sys1 )
679:
1.16 jwilke 680: 0 Constant defstart
681:
1.14 jwilke 682: [IFDEF] docol,
683: : (:noname) ( -- colon-sys )
684: \ common factor of : and :noname
1.34 anton 685: docol, ]comp
1.14 jwilke 686: [ELSE]
1.7 anton 687: : (:noname) ( -- colon-sys )
688: \ common factor of : and :noname
1.34 anton 689: docol: cfa,
1.14 jwilke 690: [THEN]
1.40 anton 691: defstart ] :-hook ;
1.7 anton 692:
1.1 pazsan 693: : : ( "name" -- colon-sys ) \ core colon
1.7 anton 694: Header (:noname) ;
695:
696: : :noname ( -- xt colon-sys ) \ core-ext colon-no-name
697: 0 last !
698: cfalign here (:noname) ;
1.1 pazsan 699:
1.14 jwilke 700: [IFDEF] fini,
701: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
702: ;-hook ?struc fini, comp[ reveal postpone [ ; immediate restrict
703: [ELSE]
1.1 pazsan 704: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
1.57 pazsan 705: ;-hook ?struc [compile] exit
706: [ has? peephole [IF] ] finish-code [ [THEN] ]
707: reveal postpone [ ; immediate restrict
1.14 jwilke 708: [THEN]
1.1 pazsan 709:
710: \ \ Search list handling: reveal words, recursive 23feb93py
711:
712: : last? ( -- false / nfa nfa )
1.56 anton 713: latest ?dup ;
1.1 pazsan 714:
1.83 pazsan 715: Variable warnings ( -- addr ) \ gforth
716: G -1 warnings T !
717:
718: has? ec [IF]
719: : reveal ( -- ) \ gforth
720: last?
721: if \ the last word has a header
722: dup ( name>link ) @ -1 =
723: if \ it is still hidden
1.88 pazsan 724: forth-wordlist dup >r @ over
1.84 pazsan 725: [ has? flash [IF] ] flash! [ [ELSE] ] ! [ [THEN] ] r> !
1.83 pazsan 726: else
727: drop
728: then
729: then ;
730: [ELSE]
1.1 pazsan 731: : (reveal) ( nt wid -- )
1.3 pazsan 732: wordlist-id dup >r
1.1 pazsan 733: @ over ( name>link ) !
734: r> ! ;
735:
736: \ make entry in wordlist-map
737: ' (reveal) f83search reveal-method !
738:
739: : check-shadow ( addr count wid -- )
1.2 pazsan 740: \G prints a warning if the string is already present in the wordlist
741: >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
742: >stderr
743: ." redefined " name>string 2dup type
1.43 anton 744: str= 0= if
1.2 pazsan 745: ." with " type
746: else
747: 2drop
748: then
749: space space EXIT
750: then
751: 2drop 2drop ;
1.1 pazsan 752:
753: : reveal ( -- ) \ gforth
754: last?
755: if \ the last word has a header
756: dup ( name>link ) @ 1 and
757: if \ it is still hidden
758: dup ( name>link ) @ 1 xor ( nt wid )
759: 2dup >r name>string r> check-shadow ( nt wid )
1.83 pazsan 760: dup wordlist-map @ reveal-method perform
1.1 pazsan 761: else
762: drop
763: then
764: then ;
765:
766: : rehash ( wid -- )
767: dup wordlist-map @ rehash-method perform ;
1.80 pazsan 768: [THEN]
1.1 pazsan 769:
770: ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth
1.10 crook 771: \g Make the current definition visible, enabling it to call itself
1.1 pazsan 772: \g recursively.
773: immediate restrict
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