1 ;;;; various primitive memory access VOPs for the x86 VM
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
14 ;;;; data object ref/set stuff
17 (:args (object :scs (descriptor-reg)))
18 (:info name offset lowtag)
20 (:results (result :scs (descriptor-reg any-reg)))
22 (loadw result object offset lowtag)))
24 (define-vop (set-slot)
25 (:args (object :scs (descriptor-reg))
26 (value :scs (descriptor-reg any-reg immediate)))
27 (:temporary (:sc descriptor-reg) temp)
28 (:info name offset lowtag)
32 (if (sc-is value immediate)
33 (let ((val (tn-value value)))
34 (move-immediate (make-ea :qword
36 :disp (- (* offset n-word-bytes)
42 (+ nil-value (static-symbol-offset val)))
44 (logior (ash (char-code val) n-widetag-bits)
47 ;; Else, value not immediate.
48 (storew value object offset lowtag))))
52 ;;;; symbol hacking VOPs
54 ;;; these next two cf the sparc version, by jrd.
55 ;;; FIXME: Deref this ^ reference.
58 ;;; The compiler likes to be able to directly SET symbols.
61 (:args (symbol :scs (descriptor-reg))
62 (value :scs (descriptor-reg any-reg)))
63 (:temporary (:sc descriptor-reg) tls)
64 ;;(:policy :fast-safe)
66 (let ((global-val (gen-label))
68 (loadw tls symbol symbol-tls-index-slot other-pointer-lowtag)
70 (inst jmp :z global-val)
71 (inst cmp (make-ea :qword :base thread-base-tn :scale 1 :index tls)
72 no-tls-value-marker-widetag)
73 (inst jmp :z global-val)
74 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls)
77 (emit-label global-val)
78 (storew value symbol symbol-value-slot other-pointer-lowtag)
81 ;; unithreaded it's a lot simpler ...
83 (define-vop (set cell-set)
84 (:variant symbol-value-slot other-pointer-lowtag))
86 ;;; With Symbol-Value, we check that the value isn't the trap object. So
87 ;;; Symbol-Value of NIL is NIL.
89 (define-vop (symbol-value)
90 (:translate symbol-value)
92 (:args (object :scs (descriptor-reg) :to (:result 1)))
93 (:results (value :scs (descriptor-reg any-reg)))
95 (:save-p :compute-only)
97 (let* ((check-unbound-label (gen-label))
98 (err-lab (generate-error-code vop unbound-symbol-error object))
99 (ret-lab (gen-label)))
100 (loadw value object symbol-tls-index-slot other-pointer-lowtag)
101 (inst mov value (make-ea :qword :base thread-base-tn
102 :index value :scale 1))
103 (inst cmp value no-tls-value-marker-widetag)
104 (inst jmp :ne check-unbound-label)
105 (loadw value object symbol-value-slot other-pointer-lowtag)
106 (emit-label check-unbound-label)
107 (inst cmp value unbound-marker-widetag)
108 (inst jmp :e err-lab)
109 (emit-label ret-lab))))
112 (define-vop (fast-symbol-value symbol-value)
113 ;; KLUDGE: not really fast, in fact, because we're going to have to
114 ;; do a full lookup of the thread-local area anyway. But half of
115 ;; the meaning of FAST-SYMBOL-VALUE is "do not signal an error if
116 ;; unbound", which is used in the implementation of COPY-SYMBOL. --
119 (:translate symbol-value)
121 (let ((ret-lab (gen-label)))
122 (loadw value object symbol-tls-index-slot other-pointer-lowtag)
124 (make-ea :qword :base thread-base-tn :index value :scale 1))
125 (inst cmp value no-tls-value-marker-widetag)
126 (inst jmp :ne ret-lab)
127 (loadw value object symbol-value-slot other-pointer-lowtag)
128 (emit-label ret-lab))))
131 (define-vop (symbol-value)
132 (:translate symbol-value)
134 (:args (object :scs (descriptor-reg) :to (:result 1)))
135 (:results (value :scs (descriptor-reg any-reg)))
137 (:save-p :compute-only)
139 (let ((err-lab (generate-error-code vop unbound-symbol-error object)))
140 (loadw value object symbol-value-slot other-pointer-lowtag)
141 (inst cmp value unbound-marker-widetag)
142 (inst jmp :e err-lab))))
145 (define-vop (fast-symbol-value cell-ref)
146 (:variant symbol-value-slot other-pointer-lowtag)
148 (:translate symbol-value))
150 (defknown locked-symbol-global-value-add (symbol fixnum) fixnum ())
152 (define-vop (locked-symbol-global-value-add)
153 (:args (object :scs (descriptor-reg) :to :result)
154 (value :scs (any-reg) :target result))
155 (:arg-types * tagged-num)
156 (:results (result :scs (any-reg) :from (:argument 1)))
158 (:translate locked-symbol-global-value-add)
159 (:result-types tagged-num)
164 (inst add (make-ea :qword :base object
165 :disp (- (* symbol-value-slot n-word-bytes)
166 other-pointer-lowtag))
173 (:args (object :scs (descriptor-reg)))
176 (:temporary (:sc descriptor-reg #+nil(:from (:argument 0))) value)
178 (let ((check-unbound-label (gen-label)))
179 (loadw value object symbol-tls-index-slot other-pointer-lowtag)
181 (make-ea :qword :base thread-base-tn :index value :scale 1))
182 (inst cmp value no-tls-value-marker-widetag)
183 (inst jmp :ne check-unbound-label)
184 (loadw value object symbol-value-slot other-pointer-lowtag)
185 (emit-label check-unbound-label)
186 (inst cmp value unbound-marker-widetag)
187 (inst jmp (if not-p :e :ne) target))))
193 (:args (object :scs (descriptor-reg)))
197 (inst cmp (make-ea-for-object-slot object symbol-value-slot
198 other-pointer-lowtag)
199 unbound-marker-widetag)
200 (inst jmp (if not-p :e :ne) target)))
203 (define-vop (symbol-hash)
205 (:translate symbol-hash)
206 (:args (symbol :scs (descriptor-reg)))
207 (:results (res :scs (any-reg)))
208 (:result-types positive-fixnum)
210 ;; The symbol-hash slot of NIL holds NIL because it is also the
211 ;; cdr slot, so we have to strip off the three low bits to make sure
212 ;; it is a fixnum. The lowtag selection magic that is required to
213 ;; ensure this is explained in the comment in objdef.lisp
214 (loadw res symbol symbol-hash-slot other-pointer-lowtag)
215 (inst and res (lognot #b111))))
217 ;;;; fdefinition (FDEFN) objects
219 (define-vop (fdefn-fun cell-ref) ; /pfw - alpha
220 (:variant fdefn-fun-slot other-pointer-lowtag))
222 (define-vop (safe-fdefn-fun)
223 (:args (object :scs (descriptor-reg) :to (:result 1)))
224 (:results (value :scs (descriptor-reg any-reg)))
226 (:save-p :compute-only)
228 (loadw value object fdefn-fun-slot other-pointer-lowtag)
229 (inst cmp value nil-value)
230 (let ((err-lab (generate-error-code vop undefined-fun-error object)))
231 (inst jmp :e err-lab))))
233 (define-vop (set-fdefn-fun)
235 (:translate (setf fdefn-fun))
236 (:args (function :scs (descriptor-reg) :target result)
237 (fdefn :scs (descriptor-reg)))
238 (:temporary (:sc unsigned-reg) raw)
239 (:temporary (:sc byte-reg) type)
240 (:results (result :scs (descriptor-reg)))
242 (load-type type function (- fun-pointer-lowtag))
244 (make-ea :byte :base function
245 :disp (- (* simple-fun-code-offset n-word-bytes)
246 fun-pointer-lowtag)))
247 (inst cmp type simple-fun-header-widetag)
248 (inst jmp :e NORMAL-FUN)
249 (inst lea raw (make-fixup "closure_tramp" :foreign))
251 (storew function fdefn fdefn-fun-slot other-pointer-lowtag)
252 (storew raw fdefn fdefn-raw-addr-slot other-pointer-lowtag)
253 (move result function)))
255 (define-vop (fdefn-makunbound)
257 (:translate fdefn-makunbound)
258 (:args (fdefn :scs (descriptor-reg) :target result))
259 (:results (result :scs (descriptor-reg)))
261 (storew nil-value fdefn fdefn-fun-slot other-pointer-lowtag)
262 (storew (make-fixup "undefined_tramp" :foreign)
263 fdefn fdefn-raw-addr-slot other-pointer-lowtag)
264 (move result fdefn)))
266 ;;;; binding and unbinding
268 ;;; BIND -- Establish VAL as a binding for SYMBOL. Save the old value and
269 ;;; the symbol on the binding stack and stuff the new value into the
274 (:args (val :scs (any-reg descriptor-reg))
275 (symbol :scs (descriptor-reg)))
276 (:temporary (:sc descriptor-reg :offset rax-offset) rax)
277 (:temporary (:sc unsigned-reg) tls-index temp bsp)
279 (let ((tls-index-valid (gen-label))
280 (get-tls-index-lock (gen-label))
281 (release-tls-index-lock (gen-label)))
282 (load-binding-stack-pointer bsp)
283 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
284 (inst add bsp (* binding-size n-word-bytes))
285 (store-binding-stack-pointer bsp)
286 (inst or tls-index tls-index)
287 (inst jmp :ne tls-index-valid)
290 (emit-label get-tls-index-lock)
294 (inst cmpxchg (make-ea-for-symbol-value *tls-index-lock*) temp)
295 (inst jmp :ne get-tls-index-lock)
296 ;; now with the lock held, see if the symbol's tls index has
297 ;; been set in the meantime
298 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
299 (inst or tls-index tls-index)
300 (inst jmp :ne release-tls-index-lock)
301 ;; allocate a new tls-index
302 (load-symbol-value tls-index *free-tls-index*)
303 (inst add tls-index 8) ;XXX surely we can do this more
304 (store-symbol-value tls-index *free-tls-index*) ;succintly
305 (inst sub tls-index 8)
306 (storew tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
307 (emit-label release-tls-index-lock)
308 (store-symbol-value 0 *tls-index-lock*))
310 (emit-label tls-index-valid)
312 (make-ea :qword :base thread-base-tn :scale 1 :index tls-index))
313 (storew temp bsp (- binding-value-slot binding-size))
314 (storew symbol bsp (- binding-symbol-slot binding-size))
315 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls-index)
320 (:args (val :scs (any-reg descriptor-reg))
321 (symbol :scs (descriptor-reg)))
322 (:temporary (:sc unsigned-reg) temp bsp)
324 (load-symbol-value bsp *binding-stack-pointer*)
325 (loadw temp symbol symbol-value-slot other-pointer-lowtag)
326 (inst add bsp (* binding-size n-word-bytes))
327 (store-symbol-value bsp *binding-stack-pointer*)
328 (storew temp bsp (- binding-value-slot binding-size))
329 (storew symbol bsp (- binding-symbol-slot binding-size))
330 (storew val symbol symbol-value-slot other-pointer-lowtag)))
336 (:temporary (:sc unsigned-reg) symbol value bsp tls-index)
338 (load-binding-stack-pointer bsp)
339 (loadw symbol bsp (- binding-symbol-slot binding-size))
340 (loadw value bsp (- binding-value-slot binding-size))
342 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
343 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls-index)
346 (storew 0 bsp (- binding-symbol-slot binding-size))
347 (storew 0 bsp (- binding-value-slot binding-size))
348 (inst sub bsp (* binding-size n-word-bytes))
349 (store-binding-stack-pointer bsp)))
353 (:temporary (:sc unsigned-reg) symbol value bsp)
355 (load-symbol-value bsp *binding-stack-pointer*)
356 (loadw symbol bsp (- binding-symbol-slot binding-size))
357 (loadw value bsp (- binding-value-slot binding-size))
358 (storew value symbol symbol-value-slot other-pointer-lowtag)
359 (storew 0 bsp (- binding-symbol-slot binding-size))
360 (storew 0 bsp (- binding-value-slot binding-size))
361 (inst sub bsp (* binding-size n-word-bytes))
362 (store-symbol-value bsp *binding-stack-pointer*)))
365 (define-vop (unbind-to-here)
366 (:args (where :scs (descriptor-reg any-reg)))
367 (:temporary (:sc unsigned-reg) symbol value bsp #!+sb-thread tls-index)
369 (load-binding-stack-pointer bsp)
374 (loadw symbol bsp (- binding-symbol-slot binding-size))
375 (inst or symbol symbol)
377 (loadw value bsp (- binding-value-slot binding-size))
379 (storew value symbol symbol-value-slot other-pointer-lowtag)
381 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
383 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls-index)
385 (storew 0 bsp (- binding-symbol-slot binding-size))
388 (storew 0 bsp (- binding-value-slot binding-size))
389 (inst sub bsp (* binding-size n-word-bytes))
392 (store-binding-stack-pointer bsp)
398 ;;;; closure indexing
400 (define-full-reffer closure-index-ref *
401 closure-info-offset fun-pointer-lowtag
402 (any-reg descriptor-reg) * %closure-index-ref)
404 (define-full-setter set-funcallable-instance-info *
405 funcallable-instance-info-offset fun-pointer-lowtag
406 (any-reg descriptor-reg) * %set-funcallable-instance-info)
408 (define-full-reffer funcallable-instance-info *
409 funcallable-instance-info-offset fun-pointer-lowtag
410 (descriptor-reg any-reg) * %funcallable-instance-info)
412 (define-vop (closure-ref slot-ref)
413 (:variant closure-info-offset fun-pointer-lowtag))
415 (define-vop (closure-init slot-set)
416 (:variant closure-info-offset fun-pointer-lowtag))
418 ;;;; value cell hackery
420 (define-vop (value-cell-ref cell-ref)
421 (:variant value-cell-value-slot other-pointer-lowtag))
423 (define-vop (value-cell-set cell-set)
424 (:variant value-cell-value-slot other-pointer-lowtag))
426 ;;;; structure hackery
428 (define-vop (instance-length)
430 (:translate %instance-length)
431 (:args (struct :scs (descriptor-reg)))
432 (:results (res :scs (unsigned-reg)))
433 (:result-types positive-fixnum)
435 (loadw res struct 0 instance-pointer-lowtag)
436 (inst shr res n-widetag-bits)))
438 (define-full-reffer instance-index-ref * instance-slots-offset
439 instance-pointer-lowtag (any-reg descriptor-reg) * %instance-ref)
441 (define-full-setter instance-index-set * instance-slots-offset
442 instance-pointer-lowtag (any-reg descriptor-reg) * %instance-set)
445 (defknown %instance-set-conditional (instance index t t) t
448 (define-vop (instance-set-conditional)
449 (:translate %instance-set-conditional)
450 (:args (object :scs (descriptor-reg) :to :eval)
451 (slot :scs (any-reg) :to :result)
452 (old-value :scs (descriptor-reg any-reg) :target rax)
453 (new-value :scs (descriptor-reg any-reg)))
454 (:arg-types instance positive-fixnum * *)
455 (:temporary (:sc descriptor-reg :offset rax-offset
456 :from (:argument 2) :to :result :target result) rax)
457 (:results (result :scs (descriptor-reg any-reg)))
458 ;(:guard (backend-featurep :i486))
463 (inst cmpxchg (make-ea :qword :base object :index slot :scale 1
464 :disp (- (* instance-slots-offset n-word-bytes)
465 instance-pointer-lowtag))
471 ;;;; code object frobbing
473 (define-full-reffer code-header-ref * 0 other-pointer-lowtag
474 (any-reg descriptor-reg) * code-header-ref)
476 (define-full-setter code-header-set * 0 other-pointer-lowtag
477 (any-reg descriptor-reg) * code-header-set)
481 ;;;; raw instance slot accessors
483 (define-vop (raw-instance-ref/word)
484 (:translate %raw-instance-ref/word)
486 (:args (object :scs (descriptor-reg)) (index :scs (any-reg)))
487 (:arg-types * tagged-num)
488 (:temporary (:sc unsigned-reg) tmp)
489 (:results (value :scs (unsigned-reg)))
490 (:result-types unsigned-num)
492 (loadw tmp object 0 instance-pointer-lowtag)
493 (inst shr tmp n-widetag-bits)
501 :disp (- (* (1- instance-slots-offset) n-word-bytes)
502 instance-pointer-lowtag)))))
504 (define-vop (raw-instance-set/word)
505 (:translate %raw-instance-set/word)
507 (:args (object :scs (descriptor-reg))
508 (index :scs (any-reg))
509 (value :scs (unsigned-reg) :target result))
510 (:arg-types * tagged-num unsigned-num)
511 (:temporary (:sc unsigned-reg) tmp)
512 (:results (result :scs (unsigned-reg)))
513 (:result-types unsigned-num)
515 (loadw tmp object 0 instance-pointer-lowtag)
516 (inst shr tmp n-widetag-bits)
523 :disp (- (* (1- instance-slots-offset) n-word-bytes)
524 instance-pointer-lowtag))
526 (move result value)))
528 (define-vop (raw-instance-ref/single)
529 (:translate %raw-instance-ref/single)
531 (:args (object :scs (descriptor-reg))
532 (index :scs (any-reg)))
533 (:arg-types * positive-fixnum)
534 (:temporary (:sc unsigned-reg) tmp)
535 (:results (value :scs (single-reg)))
536 (:result-types single-float)
538 (loadw tmp object 0 instance-pointer-lowtag)
539 (inst shr tmp n-widetag-bits)
547 :disp (- (* (1- instance-slots-offset) n-word-bytes)
548 instance-pointer-lowtag)))))
550 (define-vop (raw-instance-set/single)
551 (:translate %raw-instance-set/single)
553 (:args (object :scs (descriptor-reg))
554 (index :scs (any-reg))
555 (value :scs (single-reg) :target result))
556 (:arg-types * positive-fixnum single-float)
557 (:temporary (:sc unsigned-reg) tmp)
558 (:results (result :scs (single-reg)))
559 (:result-types single-float)
561 (loadw tmp object 0 instance-pointer-lowtag)
562 (inst shr tmp n-widetag-bits)
569 :disp (- (* (1- instance-slots-offset) n-word-bytes)
570 instance-pointer-lowtag))
572 (unless (location= result value)
573 (inst movss result value))))
575 (define-vop (raw-instance-ref/double)
576 (:translate %raw-instance-ref/double)
578 (:args (object :scs (descriptor-reg))
579 (index :scs (any-reg)))
580 (:arg-types * positive-fixnum)
581 (:temporary (:sc unsigned-reg) tmp)
582 (:results (value :scs (double-reg)))
583 (:result-types double-float)
585 (loadw tmp object 0 instance-pointer-lowtag)
586 (inst shr tmp n-widetag-bits)
594 :disp (- (* (1- instance-slots-offset) n-word-bytes)
595 instance-pointer-lowtag)))))
597 (define-vop (raw-instance-set/double)
598 (:translate %raw-instance-set/double)
600 (:args (object :scs (descriptor-reg))
601 (index :scs (any-reg))
602 (value :scs (double-reg) :target result))
603 (:arg-types * positive-fixnum double-float)
604 (:temporary (:sc unsigned-reg) tmp)
605 (:results (result :scs (double-reg)))
606 (:result-types double-float)
608 (loadw tmp object 0 instance-pointer-lowtag)
609 (inst shr tmp n-widetag-bits)
616 :disp (- (* (1- instance-slots-offset) n-word-bytes)
617 instance-pointer-lowtag))
619 (unless (location= result value)
620 (inst movsd result value))))
622 (define-vop (raw-instance-ref/complex-single)
623 (:translate %raw-instance-ref/complex-single)
625 (:args (object :scs (descriptor-reg))
626 (index :scs (any-reg)))
627 (:arg-types * positive-fixnum)
628 (:temporary (:sc unsigned-reg) tmp)
629 (:results (value :scs (complex-single-reg)))
630 (:result-types complex-single-float)
632 (loadw tmp object 0 instance-pointer-lowtag)
633 (inst shr tmp n-widetag-bits)
636 (let ((real-tn (complex-single-reg-real-tn value)))
642 :disp (- (* (1- instance-slots-offset) n-word-bytes)
643 instance-pointer-lowtag))))
644 (let ((imag-tn (complex-single-reg-imag-tn value)))
650 :disp (+ (* (1- instance-slots-offset) n-word-bytes)
652 (- instance-pointer-lowtag)))))))
654 (define-vop (raw-instance-set/complex-single)
655 (:translate %raw-instance-set/complex-single)
657 (:args (object :scs (descriptor-reg))
658 (index :scs (any-reg))
659 (value :scs (complex-single-reg) :target result))
660 (:arg-types * positive-fixnum complex-single-float)
661 (:temporary (:sc unsigned-reg) tmp)
662 (:results (result :scs (complex-single-reg)))
663 (:result-types complex-single-float)
665 (loadw tmp object 0 instance-pointer-lowtag)
666 (inst shr tmp n-widetag-bits)
669 (let ((value-real (complex-single-reg-real-tn value))
670 (result-real (complex-single-reg-real-tn result)))
671 (inst movss (make-ea :dword
674 :disp (- (* (1- instance-slots-offset) n-word-bytes)
675 instance-pointer-lowtag))
677 (unless (location= value-real result-real)
678 (inst movss result-real value-real)))
679 (let ((value-imag (complex-single-reg-imag-tn value))
680 (result-imag (complex-single-reg-imag-tn result)))
681 (inst movss (make-ea :dword
684 :disp (+ (* (1- instance-slots-offset) n-word-bytes)
686 (- instance-pointer-lowtag)))
688 (unless (location= value-imag result-imag)
689 (inst movss result-imag value-imag)))))
691 (define-vop (raw-instance-ref/complex-double)
692 (:translate %raw-instance-ref/complex-double)
694 (:args (object :scs (descriptor-reg))
695 (index :scs (any-reg)))
696 (:arg-types * positive-fixnum)
697 (:temporary (:sc unsigned-reg) tmp)
698 (:results (value :scs (complex-double-reg)))
699 (:result-types complex-double-float)
701 (loadw tmp object 0 instance-pointer-lowtag)
702 (inst shr tmp n-widetag-bits)
705 (let ((real-tn (complex-double-reg-real-tn value)))
711 :disp (- (* (- instance-slots-offset 2) n-word-bytes)
712 instance-pointer-lowtag))))
713 (let ((imag-tn (complex-double-reg-imag-tn value)))
719 :disp (- (* (1- instance-slots-offset) n-word-bytes)
720 instance-pointer-lowtag))))))
722 (define-vop (raw-instance-set/complex-double)
723 (:translate %raw-instance-set/complex-double)
725 (:args (object :scs (descriptor-reg))
726 (index :scs (any-reg))
727 (value :scs (complex-double-reg) :target result))
728 (:arg-types * positive-fixnum complex-double-float)
729 (:temporary (:sc unsigned-reg) tmp)
730 (:results (result :scs (complex-double-reg)))
731 (:result-types complex-double-float)
733 (loadw tmp object 0 instance-pointer-lowtag)
734 (inst shr tmp n-widetag-bits)
737 (let ((value-real (complex-double-reg-real-tn value))
738 (result-real (complex-double-reg-real-tn result)))
739 (inst movsd (make-ea :dword
742 :disp (- (* (- instance-slots-offset 2) n-word-bytes)
743 instance-pointer-lowtag))
745 (unless (location= value-real result-real)
746 (inst movsd result-real value-real)))
747 (let ((value-imag (complex-double-reg-imag-tn value))
748 (result-imag (complex-double-reg-imag-tn result)))
749 (inst movsd (make-ea :dword
752 :disp (- (* (1- instance-slots-offset) n-word-bytes)
753 instance-pointer-lowtag))
755 (unless (location= value-imag result-imag)
756 (inst movsd result-imag value-imag)))))