5 ;;; Sometimes we want to skip over any FOPs with side-effects (like
6 ;;; function calls) while executing other FOPs. *SKIP-UNTIL* will
7 ;;; either contain the position where the skipping will stop, or
8 ;;; NIL if we're executing normally.
9 (defvar *skip-until* nil)
11 ;;; Define NAME as a fasl operation, with op-code FOP-CODE. PUSHP
12 ;;; describes what the body does to the fop stack:
14 ;;; The body might pop the fop stack. The result of the body is
15 ;;; pushed on the fop stack.
17 ;;; The body might pop the fop stack. The result of the body is
19 ;;; STACKP describes whether or not the body interacts with the fop stack.
20 (defmacro define-fop ((name fop-code &key (pushp t) (stackp t)) &body forms)
24 `(with-fop-stack ,pushp ,@forms)
26 (%define-fop ',name ,fop-code)))
28 (defun %define-fop (name code)
29 (let ((oname (svref *fop-names* code)))
30 (when (and oname (not (eq oname name)))
31 (error "multiple names for fop code ~D: ~S and ~S" code name oname)))
32 ;; KLUDGE: It's mnemonically suboptimal to use 'FOP-CODE as the name of the
33 ;; tag which associates names with codes when it's also used as one of
34 ;; the names. Perhaps the fops named FOP-CODE and FOP-SMALL-CODE could
35 ;; be renamed to something more mnemonic? -- WHN 19990902
36 (let ((ocode (get name 'fop-code)))
37 (when (and ocode (/= ocode code))
38 (error "multiple codes for fop name ~S: ~D and ~D" name code ocode)))
39 (setf (svref *fop-names* code) name
40 (get name 'fop-code) code
41 (svref *fop-funs* code) (symbol-function name))
44 ;;; Define a pair of fops which are identical except that one reads
45 ;;; a four-byte argument while the other reads a one-byte argument. The
46 ;;; argument can be accessed by using the CLONE-ARG macro.
48 ;;; KLUDGE: It would be nice if the definition here encapsulated which
49 ;;; value ranges went with which fop variant, and chose the correct
50 ;;; fop code to use. Currently, since such logic isn't encapsulated,
51 ;;; we see callers doing stuff like
52 ;;; (cond ((and (< num-consts #x100) (< total-length #x10000))
53 ;;; (dump-fop 'sb!impl::fop-small-code file)
54 ;;; (dump-byte num-consts file)
55 ;;; (dump-integer-as-n-bytes total-length 2 file))
57 ;;; (dump-fop 'sb!impl::fop-code file)
58 ;;; (dump-word num-consts file)
59 ;;; (dump-word total-length file))))
60 ;;; in several places. It would be cleaner if this could be replaced with
62 ;;; (dump-fop file fop-code num-consts total-length)
63 ;;; Some of this logic is already in DUMP-FOP*, but that still requires the
64 ;;; caller to know that it's a 1-byte-arg/4-byte-arg cloned fop pair, and to
65 ;;; know both the 1-byte-arg and the 4-byte-arg fop names. -- WHN 19990902
66 (defmacro define-cloned-fops ((name code &key (pushp t) (stackp t))
67 (small-name small-code) &rest forms)
68 (aver (member pushp '(nil t)))
69 (aver (member stackp '(nil t)))
71 (macrolet ((clone-arg () '(read-word-arg)))
72 (define-fop (,name ,code :pushp ,pushp :stackp ,stackp) ,@forms))
73 (macrolet ((clone-arg () '(read-byte-arg)))
74 (define-fop (,small-name ,small-code :pushp ,pushp :stackp ,stackp) ,@forms))))
76 ;;; a helper function for reading string values from FASL files: sort
77 ;;; of like READ-SEQUENCE specialized for files of (UNSIGNED-BYTE 8),
78 ;;; with an automatic conversion from (UNSIGNED-BYTE 8) into CHARACTER
79 ;;; for each element read
80 (defun read-string-as-bytes (stream string &optional (length (length string)))
81 (declare (type (simple-array character (*)) string)
84 (with-fast-read-byte ((unsigned-byte 8) stream)
87 (sb!xc:code-char (fast-read-byte)))))
89 (defun read-base-string-as-bytes (stream string &optional (length (length string)))
90 (declare (type (simple-array base-char (*)) string)
93 (with-fast-read-byte ((unsigned-byte 8) stream)
96 (sb!xc:code-char (fast-read-byte)))))
99 (defun read-string-as-unsigned-byte-32
100 (stream string &optional (length (length string)))
101 (declare (type (simple-array character (*)) string)
104 #+sb-xc-host (bug "READ-STRING-AS-UNSIGNED-BYTE-32 called")
105 (with-fast-read-byte ((unsigned-byte 8) stream)
107 (setf (aref string i)
108 (sb!xc:code-char (fast-read-u-integer 4)))))
111 ;;;; miscellaneous fops
113 ;;; FIXME: POP-STACK should be called something more mnemonic. (POP-FOP-STACK?
114 ;;; But that would conflict with PUSH-FOP-TABLE. Something, anyway..)
116 ;;; Setting this variable causes execution of a FOP-NOP4 to produce
117 ;;; output to *DEBUG-IO*. This can be handy when trying to follow the
118 ;;; progress of FASL loading.
120 (defvar *show-fop-nop4-p* nil)
122 ;;; CMU CL had a single no-op fop, FOP-NOP, with fop code 0. Since 0
123 ;;; occurs disproportionately often in fasl files for other reasons,
124 ;;; FOP-NOP is less than ideal for writing human-readable patterns
125 ;;; into fasl files for debugging purposes. There's no shortage of
126 ;;; unused fop codes, so we add this second NOP, which reads 4
127 ;;; arbitrary bytes and discards them.
128 (define-fop (fop-nop4 137 :stackp nil)
129 (let ((arg (read-arg 4)))
130 (declare (ignorable arg))
132 (when *show-fop-nop4-p*
133 (format *debug-io* "~&/FOP-NOP4 ARG=~W=#X~X~%" arg arg))))
135 (define-fop (fop-nop 0 :stackp nil))
136 (define-fop (fop-pop 1 :pushp nil) (push-fop-table (pop-stack)))
137 (define-fop (fop-push 2) (ref-fop-table (read-word-arg)))
138 (define-fop (fop-byte-push 3) (ref-fop-table (read-byte-arg)))
140 (define-fop (fop-empty-list 4) ())
141 (define-fop (fop-truth 5) t)
142 ;;; CMU CL had FOP-POP-FOR-EFFECT as fop 65, but it was never used and seemed
143 ;;; to have no possible use.
144 (define-fop (fop-misc-trap 66)
145 #+sb-xc-host ; since xc host doesn't know how to compile %PRIMITIVE
146 (error "FOP-MISC-TRAP can't be defined without %PRIMITIVE.")
148 (%primitive sb!c:make-unbound-marker))
150 (define-cloned-fops (fop-character 68) (fop-short-character 69)
151 (code-char (clone-arg)))
153 (define-cloned-fops (fop-struct 48) (fop-small-struct 49)
154 (let* ((size (clone-arg))
155 (res (%make-instance size)))
156 (declare (type index size))
157 (let* ((layout (pop-stack))
158 (nuntagged (layout-n-untagged-slots layout))
159 (ntagged (- size nuntagged)))
160 (setf (%instance-ref res 0) layout)
161 (dotimes (n (1- ntagged))
162 (declare (type index n))
163 (setf (%instance-ref res (1+ n)) (pop-stack)))
164 (dotimes (n nuntagged)
165 (declare (type index n))
166 (setf (%raw-instance-ref/word res (- nuntagged n 1)) (pop-stack))))
169 (define-fop (fop-layout 45)
170 (let ((nuntagged (pop-stack))
172 (depthoid (pop-stack))
173 (inherits (pop-stack))
175 (find-and-init-or-check-layout name length inherits depthoid nuntagged)))
177 (define-fop (fop-end-group 64 :stackp nil)
178 (/show0 "THROWing FASL-GROUP-END")
179 (throw 'fasl-group-end t))
181 ;;; We used to have FOP-NORMAL-LOAD as 81 and FOP-MAYBE-COLD-LOAD as
182 ;;; 82 until GENESIS learned how to work with host symbols and
183 ;;; packages directly instead of piggybacking on the host code.
185 (define-fop (fop-verify-table-size 62 :stackp nil)
186 (let ((expected-index (read-word-arg)))
187 (unless (= (get-fop-table-index) expected-index)
188 (bug "fasl table of improper size"))))
189 (define-fop (fop-verify-empty-stack 63 :stackp nil)
190 (unless (fop-stack-empty-p)
191 (bug "fasl stack not empty when it should be")))
193 ;;;; fops for loading symbols
195 (defun aux-fop-intern (smallp package)
196 (declare (optimize speed))
197 (let* ((size (if smallp
200 (buffer (make-string size)))
202 (read-string-as-bytes *fasl-input-stream* buffer size)
206 (read-string-as-unsigned-byte-32 *fasl-input-stream* buffer size)
208 (read-string-as-bytes *fasl-input-stream* buffer size))
209 (push-fop-table (without-package-locks
215 (macrolet ((def (name code smallp package-form)
216 `(define-fop (,name ,code)
217 (aux-fop-intern ,smallp ,package-form))))
219 (def fop-lisp-symbol-save 75 nil *cl-package*)
220 (def fop-lisp-small-symbol-save 76 t *cl-package*)
221 (def fop-keyword-symbol-save 77 nil *keyword-package*)
222 (def fop-keyword-small-symbol-save 78 t *keyword-package*)
224 ;; FIXME: Because we don't have FOP-SYMBOL-SAVE any more, an
225 ;; enormous number of symbols will fall through to this case,
226 ;; probably resulting in bloated fasl files. A new
227 ;; FOP-SYMBOL-IN-LAST-PACKAGE-SAVE/FOP-SMALL-SYMBOL-IN-LAST-PACKAGE-SAVE
228 ;; cloned fop pair could undo some of this bloat.
229 (def fop-symbol-in-package-save 8 nil
230 (ref-fop-table (read-word-arg)))
231 (def fop-small-symbol-in-package-save 9 t
232 (ref-fop-table (read-word-arg)))
233 (def fop-symbol-in-byte-package-save 10 nil
234 (ref-fop-table (read-byte-arg)))
235 (def fop-small-symbol-in-byte-package-save 11 t
236 (ref-fop-table (read-byte-arg))))
238 (define-cloned-fops (fop-uninterned-symbol-save 12)
239 (fop-uninterned-small-symbol-save 13)
240 (let* ((arg (clone-arg))
241 (res (make-string arg)))
243 (read-string-as-bytes *fasl-input-stream* res)
245 (read-string-as-unsigned-byte-32 *fasl-input-stream* res)
246 (push-fop-table (make-symbol res))))
248 (define-fop (fop-package 14)
249 (find-undeleted-package-or-lose (pop-stack)))
251 (define-cloned-fops (fop-named-package-save 156 :stackp nil)
252 (fop-small-named-package-save 157)
253 (let* ((arg (clone-arg))
254 (package-name (make-string arg)))
256 (read-string-as-bytes *fasl-input-stream* package-name)
260 (read-string-as-bytes *fasl-input-stream* package-name)
262 (read-string-as-unsigned-byte-32 *fasl-input-stream* package-name))
263 (push-fop-table (find-undeleted-package-or-lose package-name))))
265 ;;;; fops for loading numbers
267 ;;; Load a signed integer LENGTH bytes long from *FASL-INPUT-STREAM*.
268 (defun load-s-integer (length)
269 (declare (fixnum length)
271 (with-fast-read-byte ((unsigned-byte 8) *fasl-input-stream*)
272 (do* ((index length (1- index))
273 (byte 0 (fast-read-byte))
274 (result 0 (+ result (ash byte bits)))
277 (if (logbitp 7 byte) ; look at sign bit
278 (- result (ash 1 bits))
280 (declare (fixnum index byte bits)))))
282 (define-cloned-fops (fop-integer 33) (fop-small-integer 34)
283 (load-s-integer (clone-arg)))
285 (define-fop (fop-word-integer 35)
286 (with-fast-read-byte ((unsigned-byte 8) *fasl-input-stream*)
287 (fast-read-s-integer #.sb!vm:n-word-bytes)))
289 (define-fop (fop-byte-integer 36)
290 (with-fast-read-byte ((unsigned-byte 8) *fasl-input-stream*)
291 (fast-read-s-integer 1)))
293 (define-fop (fop-ratio 70)
294 (let ((den (pop-stack)))
295 (%make-ratio (pop-stack) den)))
297 (define-fop (fop-complex 71)
298 (let ((im (pop-stack)))
299 (%make-complex (pop-stack) im)))
301 (macrolet ((fast-read-single-float ()
302 '(make-single-float (fast-read-s-integer 4)))
303 (fast-read-double-float ()
304 '(let ((lo (fast-read-u-integer 4)))
305 (make-double-float (fast-read-s-integer 4) lo))))
306 (macrolet ((define-complex-fop (name fop-code type)
307 (let ((reader (symbolicate "FAST-READ-" type)))
308 `(define-fop (,name ,fop-code)
309 (with-fast-read-byte ((unsigned-byte 8) *fasl-input-stream*)
310 (complex (,reader) (,reader))))))
311 (define-float-fop (name fop-code type)
312 (let ((reader (symbolicate "FAST-READ-" type)))
313 `(define-fop (,name ,fop-code)
314 (with-fast-read-byte ((unsigned-byte 8) *fasl-input-stream*)
316 (define-complex-fop fop-complex-single-float 72 single-float)
317 (define-complex-fop fop-complex-double-float 73 double-float)
319 (define-complex-fop fop-complex-long-float 67 long-float)
320 (define-float-fop fop-single-float 46 single-float)
321 (define-float-fop fop-double-float 47 double-float)
323 (define-float-fop fop-long-float 52 long-float)))
326 (define-fop (fop-simd-pack 88)
327 (with-fast-read-byte ((unsigned-byte 8) *fasl-input-stream*)
328 (%make-simd-pack (fast-read-s-integer 8)
329 (fast-read-u-integer 8)
330 (fast-read-u-integer 8))))
334 (define-fop (fop-list 15)
335 (do ((res () (cons (pop-stack) res))
336 (n (read-byte-arg) (1- n)))
338 (declare (type index n))))
340 (define-fop (fop-list* 16)
341 (do ((res (pop-stack) (cons (pop-stack) res))
342 (n (read-byte-arg) (1- n)))
344 (declare (type index n))))
346 (macrolet ((frob (name op fun n)
347 `(define-fop (,name ,op)
348 (call-with-popped-args ,fun ,n))))
350 (frob fop-list-1 17 list 1)
351 (frob fop-list-2 18 list 2)
352 (frob fop-list-3 19 list 3)
353 (frob fop-list-4 20 list 4)
354 (frob fop-list-5 21 list 5)
355 (frob fop-list-6 22 list 6)
356 (frob fop-list-7 23 list 7)
357 (frob fop-list-8 24 list 8)
359 (frob fop-list*-1 25 list* 2)
360 (frob fop-list*-2 26 list* 3)
361 (frob fop-list*-3 27 list* 4)
362 (frob fop-list*-4 28 list* 5)
363 (frob fop-list*-5 29 list* 6)
364 (frob fop-list*-6 30 list* 7)
365 (frob fop-list*-7 31 list* 8)
366 (frob fop-list*-8 32 list* 9))
368 ;;;; fops for loading arrays
370 (define-cloned-fops (fop-base-string 37) (fop-small-base-string 38)
371 (let* ((arg (clone-arg))
372 (res (make-string arg :element-type 'base-char)))
373 (read-base-string-as-bytes *fasl-input-stream* res)
379 (define-cloned-fops (fop-character-string 161) (fop-small-character-string 162)
380 (bug "CHARACTER-STRING FOP encountered"))
383 (define-cloned-fops (fop-character-string 161) (fop-small-character-string 162)
384 (let* ((arg (clone-arg))
385 (res (make-string arg)))
386 (read-string-as-unsigned-byte-32 *fasl-input-stream* res)
389 (define-cloned-fops (fop-vector 39) (fop-small-vector 40)
390 (let* ((size (clone-arg))
391 (res (make-array size)))
392 (declare (fixnum size))
393 (do ((n (1- size) (1- n)))
395 (setf (svref res n) (pop-stack)))
398 (define-fop (fop-array 83)
399 (let* ((rank (read-word-arg))
401 (length (length vec))
402 (res (make-array-header sb!vm:simple-array-widetag rank)))
403 (declare (simple-array vec)
404 (type (unsigned-byte #.(- sb!vm:n-word-bits sb!vm:n-widetag-bits)) rank))
405 (set-array-header res vec length nil 0
407 (dimensions () (cons (pop-stack) dimensions)))
408 ((zerop i) dimensions)
409 (declare (type index i)))
414 (defglobal **saetp-bits-per-length**
415 (let ((array (make-array 255 :element-type '(unsigned-byte 8)
416 :initial-element 255)))
417 (loop for saetp across sb!vm:*specialized-array-element-type-properties*
419 (setf (aref array (sb!vm:saetp-typecode saetp))
420 (sb!vm:saetp-n-bits saetp)))
422 "255 means bad entry.")
423 (declaim (type (simple-array (unsigned-byte 8) (255))
424 **saetp-bits-per-length**))
426 (define-fop (fop-spec-vector 43)
427 (let* ((length (read-word-arg))
428 (widetag (read-byte-arg))
429 (bits-per-length (aref **saetp-bits-per-length** widetag))
431 (aver (< bits-per-length 255))
432 (ceiling (* length bits-per-length) sb!vm:n-byte-bits)))
433 (vector (allocate-vector widetag length (* bytes sb!vm:n-word-bytes))))
434 (declare (type index length))
435 (read-n-bytes *fasl-input-stream* vector 0 bytes)
438 (define-fop (fop-eval 53)
441 (let ((result (eval (pop-stack))))
442 ;; FIXME: CMU CL had this code here:
443 ;; (when *load-print*
447 ;; Unfortunately, this dependence on the *LOAD-PRINT* global
448 ;; variable is non-ANSI, so for now we've just punted printing in
452 (define-fop (fop-eval-for-effect 54 :pushp nil)
455 (let ((result (eval (pop-stack))))
456 ;; FIXME: See the comment about *LOAD-PRINT* in FOP-EVAL.
457 (declare (ignore result))
458 #+nil (when *load-print*
463 (define-fop (fop-funcall 55)
464 (let ((arg (read-byte-arg)))
466 (dotimes (i (1+ arg))
469 (funcall (pop-stack))
470 (do ((args () (cons (pop-stack) args))
472 ((zerop n) (apply (pop-stack) args))
473 (declare (type index n)))))))
475 (define-fop (fop-funcall-for-effect 56 :pushp nil)
476 (let ((arg (read-byte-arg)))
478 (dotimes (i (1+ arg))
481 (funcall (pop-stack))
482 (do ((args () (cons (pop-stack) args))
484 ((zerop n) (apply (pop-stack) args))
485 (declare (type index n)))))))
487 ;;;; fops for fixing up circularities
489 (define-fop (fop-rplaca 200 :pushp nil)
490 (let ((obj (ref-fop-table (read-word-arg)))
491 (idx (read-word-arg))
493 (setf (car (nthcdr idx obj)) val)))
495 (define-fop (fop-rplacd 201 :pushp nil)
496 (let ((obj (ref-fop-table (read-word-arg)))
497 (idx (read-word-arg))
499 (setf (cdr (nthcdr idx obj)) val)))
501 (define-fop (fop-svset 202 :pushp nil)
502 (let* ((obi (read-word-arg))
503 (obj (ref-fop-table obi))
504 (idx (read-word-arg))
507 (setf (%instance-ref obj idx) val)
508 (setf (svref obj idx) val))))
510 (define-fop (fop-structset 204 :pushp nil)
511 (setf (%instance-ref (ref-fop-table (read-word-arg))
515 ;;; In the original CMUCL code, this actually explicitly declared PUSHP
516 ;;; to be T, even though that's what it defaults to in DEFINE-FOP.
517 (define-fop (fop-nthcdr 203)
518 (nthcdr (read-word-arg) (pop-stack)))
520 ;;;; fops for loading functions
522 ;;; (In CMU CL there was a FOP-CODE-FORMAT (47) which was
523 ;;; conventionally placed at the beginning of each fasl file to test
524 ;;; for compatibility between the fasl file and the CMU CL which
525 ;;; loaded it. In SBCL, this functionality has been replaced by
526 ;;; putting the implementation and version in required fields in the
527 ;;; fasl file header.)
529 (define-fop (fop-code 58 :stackp nil)
530 (load-code (read-word-arg) (read-word-arg)))
532 (define-fop (fop-small-code 59 :stackp nil)
533 (load-code (read-byte-arg) (read-halfword-arg)))
535 (define-fop (fop-fdefinition 60)
536 (fdefinition-object (pop-stack) t))
538 (define-fop (fop-known-fun 65)
539 (%coerce-name-to-fun (pop-stack)))
541 (define-fop (fop-sanctify-for-execution 61)
542 (let ((component (pop-stack)))
543 (sb!vm:sanctify-for-execution component)
546 (define-fop (fop-fset 74 :pushp nil)
547 ;; Ordinary, not-for-cold-load code shouldn't need to mess with this
548 ;; at all, since it's only used as part of the conspiracy between
549 ;; the cross-compiler and GENESIS to statically link FDEFINITIONs
551 (warn "~@<FOP-FSET seen in ordinary load (not cold load) -- quite strange! ~
552 If you didn't do something strange to cause this, please report it as a ~
554 ;; Unlike CMU CL, we don't treat this as a no-op in ordinary code.
555 ;; If the user (or, more likely, developer) is trying to reload
556 ;; compiled-for-cold-load code into a warm SBCL, we'll do a warm
557 ;; assignment. (This is partly for abstract tidiness, since the warm
558 ;; assignment is the closest analogy to what happens at cold load,
559 ;; and partly because otherwise our compiled-for-cold-load code will
560 ;; fail, since in SBCL things like compiled-for-cold-load %DEFUN
561 ;; depend more strongly than in CMU CL on FOP-FSET actually doing
563 (let ((fn (pop-stack))
565 (setf (fdefinition name) fn)))
567 (define-fop (fop-note-debug-source 174 :pushp nil)
568 (warn "~@<FOP-NOTE-DEBUG-SOURCE seen in ordinary load (not cold load) -- ~
569 very strange! If you didn't do something to cause this, please report it as ~
571 ;; as with COLD-FSET above, we are going to be lenient with coming
572 ;; across this fop in a warm SBCL.
573 (let ((debug-source (pop-stack)))
574 (setf (sb!c::debug-source-compiled debug-source) (get-universal-time)
575 (sb!c::debug-source-created debug-source)
576 (file-write-date (sb!c::debug-source-namestring debug-source)))))
578 ;;; Modify a slot in a CONSTANTS object.
579 (define-cloned-fops (fop-alter-code 140 :pushp nil) (fop-byte-alter-code 141)
580 (let ((value (pop-stack))
582 (setf (code-header-ref code (clone-arg)) value)
585 (define-fop (fop-fun-entry 142)
586 #+sb-xc-host ; since xc host doesn't know how to compile %PRIMITIVE
587 (error "FOP-FUN-ENTRY can't be defined without %PRIMITIVE.")
589 (let ((info (pop-stack))
591 (arglist (pop-stack))
593 (code-object (pop-stack))
594 (offset (read-word-arg)))
595 (declare (type index offset))
596 (unless (zerop (logand offset sb!vm:lowtag-mask))
597 (bug "unaligned function object, offset = #X~X" offset))
598 (let ((fun (%primitive sb!c:compute-fun code-object offset)))
599 (setf (%simple-fun-self fun) fun)
600 (setf (%simple-fun-next fun) (%code-entry-points code-object))
601 (setf (%code-entry-points code-object) fun)
602 (setf (%simple-fun-name fun) name)
603 (setf (%simple-fun-arglist fun) arglist)
604 (setf (%simple-fun-type fun) type)
605 (setf (%simple-fun-info fun) info)
606 ;; FIXME: See the comment about *LOAD-PRINT* in FOP-EVAL.
607 #+nil (when *load-print*
609 (format t "~S defined~%" fun))
612 ;;;; Some Dylan FOPs used to live here. By 1 November 1998 the code
613 ;;;; was sufficiently stale that the functions it called were no
614 ;;;; longer defined, so I (William Harold Newman) deleted it.
616 ;;;; In case someone in the future is trying to make sense of FOP layout,
617 ;;;; it might be worth recording that the Dylan FOPs were
618 ;;;; 100 FOP-DYLAN-SYMBOL-SAVE
619 ;;;; 101 FOP-SMALL-DYLAN-SYMBOL-SAVE
620 ;;;; 102 FOP-DYLAN-KEYWORD-SAVE
621 ;;;; 103 FOP-SMALL-DYLAN-KEYWORD-SAVE
622 ;;;; 104 FOP-DYLAN-VARINFO-VALUE
624 ;;;; assemblerish fops
626 (define-fop (fop-assembler-code 144)
627 (error "cannot load assembler code except at cold load"))
629 (define-fop (fop-assembler-routine 145)
630 (error "cannot load assembler code except at cold load"))
632 (define-fop (fop-foreign-fixup 147)
633 (let* ((kind (pop-stack))
634 (code-object (pop-stack))
635 (len (read-byte-arg))
636 (sym (make-string len :element-type 'base-char)))
637 (read-n-bytes *fasl-input-stream* sym 0 len)
638 (sb!vm:fixup-code-object code-object
640 (foreign-symbol-address sym)
644 (define-fop (fop-assembler-fixup 148)
645 (let ((routine (pop-stack))
647 (code-object (pop-stack)))
648 (multiple-value-bind (value found) (gethash routine *assembler-routines*)
650 (error "undefined assembler routine: ~S" routine))
651 (sb!vm:fixup-code-object code-object (read-word-arg) value kind))
654 (define-fop (fop-code-object-fixup 149)
655 (let ((kind (pop-stack))
656 (code-object (pop-stack)))
657 ;; Note: We don't have to worry about GC moving the code-object after
658 ;; the GET-LISP-OBJ-ADDRESS and before that value is deposited, because
659 ;; we can only use code-object fixups when code-objects don't move.
660 (sb!vm:fixup-code-object code-object (read-word-arg)
661 (get-lisp-obj-address code-object) kind)
665 (define-fop (fop-foreign-dataref-fixup 150)
666 (let* ((kind (pop-stack))
667 (code-object (pop-stack))
668 (len (read-byte-arg))
669 (sym (make-string len :element-type 'base-char)))
670 (read-n-bytes *fasl-input-stream* sym 0 len)
671 (sb!vm:fixup-code-object code-object
673 (foreign-symbol-address sym t)
677 ;;; FOPs needed for implementing an IF operator in a FASL
679 ;;; Skip until a FOP-MAYBE-STOP-SKIPPING with the same POSITION is
680 ;;; executed. While skipping, we execute most FOPs normally, except
681 ;;; for ones that a) funcall/eval b) start skipping. This needs to
682 ;;; be done to ensure that the fop table gets populated correctly
683 ;;; regardless of the execution path.
684 (define-fop (fop-skip 151 :pushp nil)
685 (let ((position (pop-stack)))
687 (setf *skip-until* position)))
690 ;;; As before, but only start skipping if the top of the FOP stack is NIL.
691 (define-fop (fop-skip-if-false 152 :pushp nil)
692 (let ((condition (pop-stack))
693 (position (pop-stack)))
694 (unless (or condition
696 (setf *skip-until* position)))
699 ;;; If skipping, pop the top of the stack and discard it. Needed for
700 ;;; ensuring that the stack stays balanced when skipping.
701 (define-fop (fop-drop-if-skipping 153 :pushp nil)
706 ;;; If skipping, push a dummy value on the stack. Needed for
707 ;;; ensuring that the stack stays balanced when skipping.
708 (define-fop (fop-push-nil-if-skipping 154 :pushp nil)
713 ;;; Stop skipping if the top of the stack matches *SKIP-UNTIL*
714 (define-fop (fop-maybe-stop-skipping 155 :pushp nil)
715 (let ((label (pop-stack)))
716 (when (eql *skip-until* label)
717 (setf *skip-until* nil)))