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 ;;; Do a cell ref with an error check for being unbound.
87 ;;; XXX stil used? I can't see where -dan
88 (define-vop (checked-cell-ref)
89 (:args (object :scs (descriptor-reg) :target obj-temp))
90 (:results (value :scs (descriptor-reg any-reg)))
93 (:save-p :compute-only)
94 (:temporary (:sc descriptor-reg :from (:argument 0)) obj-temp))
96 ;;; With Symbol-Value, we check that the value isn't the trap object. So
97 ;;; Symbol-Value of NIL is NIL.
99 (define-vop (symbol-value)
100 (:translate symbol-value)
102 (:args (object :scs (descriptor-reg) :to (:result 1)))
103 (:results (value :scs (descriptor-reg any-reg)))
105 (:save-p :compute-only)
107 (let* ((check-unbound-label (gen-label))
108 (err-lab (generate-error-code vop unbound-symbol-error object))
109 (ret-lab (gen-label)))
110 (loadw value object symbol-tls-index-slot other-pointer-lowtag)
111 (inst mov value (make-ea :qword :base thread-base-tn
112 :index value :scale 1))
113 (inst cmp value no-tls-value-marker-widetag)
114 (inst jmp :ne check-unbound-label)
115 (loadw value object symbol-value-slot other-pointer-lowtag)
116 (emit-label check-unbound-label)
117 (inst cmp value unbound-marker-widetag)
118 (inst jmp :e err-lab)
119 (emit-label ret-lab))))
122 (define-vop (fast-symbol-value symbol-value)
123 ;; KLUDGE: not really fast, in fact, because we're going to have to
124 ;; do a full lookup of the thread-local area anyway. But half of
125 ;; the meaning of FAST-SYMBOL-VALUE is "do not signal an error if
126 ;; unbound", which is used in the implementation of COPY-SYMBOL. --
129 (:translate symbol-value)
131 (let ((ret-lab (gen-label)))
132 (loadw value object symbol-tls-index-slot other-pointer-lowtag)
134 (make-ea :qword :base thread-base-tn :index value :scale 1))
135 (inst cmp value no-tls-value-marker-widetag)
136 (inst jmp :ne ret-lab)
137 (loadw value object symbol-value-slot other-pointer-lowtag)
138 (emit-label ret-lab))))
141 (define-vop (symbol-value)
142 (:translate symbol-value)
144 (:args (object :scs (descriptor-reg) :to (:result 1)))
145 (:results (value :scs (descriptor-reg any-reg)))
147 (:save-p :compute-only)
149 (let ((err-lab (generate-error-code vop unbound-symbol-error object)))
150 (loadw value object symbol-value-slot other-pointer-lowtag)
151 (inst cmp value unbound-marker-widetag)
152 (inst jmp :e err-lab))))
155 (define-vop (fast-symbol-value cell-ref)
156 (:variant symbol-value-slot other-pointer-lowtag)
158 (:translate symbol-value))
160 (defknown locked-symbol-global-value-add (symbol fixnum) fixnum ())
162 (define-vop (locked-symbol-global-value-add)
163 (:args (object :scs (descriptor-reg) :to :result)
164 (value :scs (any-reg) :target result))
165 (:arg-types * tagged-num)
166 (:results (result :scs (any-reg) :from (:argument 1)))
168 (:translate locked-symbol-global-value-add)
169 (:result-types tagged-num)
174 (inst add (make-ea :qword :base object
175 :disp (- (* symbol-value-slot n-word-bytes)
176 other-pointer-lowtag))
183 (:args (object :scs (descriptor-reg)))
186 (:temporary (:sc descriptor-reg #+nil(:from (:argument 0))) value)
188 (let ((check-unbound-label (gen-label)))
189 (loadw value object symbol-tls-index-slot other-pointer-lowtag)
191 (make-ea :qword :base thread-base-tn :index value :scale 1))
192 (inst cmp value no-tls-value-marker-widetag)
193 (inst jmp :ne check-unbound-label)
194 (loadw value object symbol-value-slot other-pointer-lowtag)
195 (emit-label check-unbound-label)
196 (inst cmp value unbound-marker-widetag)
197 (inst jmp (if not-p :e :ne) target))))
203 (:args (object :scs (descriptor-reg)))
206 (:temporary (:sc descriptor-reg :from (:argument 0)) value)
208 (loadw value object symbol-value-slot other-pointer-lowtag)
209 (inst cmp value unbound-marker-widetag)
210 (inst jmp (if not-p :e :ne) target)))
213 (define-vop (symbol-hash)
215 (:translate symbol-hash)
216 (:args (symbol :scs (descriptor-reg)))
217 (:results (res :scs (any-reg)))
218 (:result-types positive-fixnum)
220 ;; The symbol-hash slot of NIL holds NIL because it is also the
221 ;; cdr slot, so we have to strip off the three low bits to make sure
222 ;; it is a fixnum. The lowtag selection magic that is required to
223 ;; ensure this is explained in the comment in objdef.lisp
224 (loadw res symbol symbol-hash-slot other-pointer-lowtag)
225 (inst and res (lognot #b111))))
227 ;;;; fdefinition (FDEFN) objects
229 (define-vop (fdefn-fun cell-ref) ; /pfw - alpha
230 (:variant fdefn-fun-slot other-pointer-lowtag))
232 (define-vop (safe-fdefn-fun)
233 (:args (object :scs (descriptor-reg) :to (:result 1)))
234 (:results (value :scs (descriptor-reg any-reg)))
236 (:save-p :compute-only)
238 (loadw value object fdefn-fun-slot other-pointer-lowtag)
239 (inst cmp value nil-value)
240 (let ((err-lab (generate-error-code vop undefined-fun-error object)))
241 (inst jmp :e err-lab))))
243 (define-vop (set-fdefn-fun)
245 (:translate (setf fdefn-fun))
246 (:args (function :scs (descriptor-reg) :target result)
247 (fdefn :scs (descriptor-reg)))
248 (:temporary (:sc unsigned-reg) raw)
249 (:temporary (:sc byte-reg) type)
250 (:results (result :scs (descriptor-reg)))
252 (load-type type function (- fun-pointer-lowtag))
254 (make-ea :byte :base function
255 :disp (- (* simple-fun-code-offset n-word-bytes)
256 fun-pointer-lowtag)))
257 (inst cmp type simple-fun-header-widetag)
258 (inst jmp :e NORMAL-FUN)
259 (inst lea raw (make-fixup "closure_tramp" :foreign))
261 (storew function fdefn fdefn-fun-slot other-pointer-lowtag)
262 (storew raw fdefn fdefn-raw-addr-slot other-pointer-lowtag)
263 (move result function)))
265 (define-vop (fdefn-makunbound)
267 (:translate fdefn-makunbound)
268 (:args (fdefn :scs (descriptor-reg) :target result))
269 (:results (result :scs (descriptor-reg)))
271 (storew nil-value fdefn fdefn-fun-slot other-pointer-lowtag)
272 (storew (make-fixup "undefined_tramp" :foreign)
273 fdefn fdefn-raw-addr-slot other-pointer-lowtag)
274 (move result fdefn)))
276 ;;;; binding and unbinding
278 ;;; BIND -- Establish VAL as a binding for SYMBOL. Save the old value and
279 ;;; the symbol on the binding stack and stuff the new value into the
284 (:args (val :scs (any-reg descriptor-reg))
285 (symbol :scs (descriptor-reg)))
286 (:temporary (:sc descriptor-reg :offset rax-offset) rax)
287 (:temporary (:sc unsigned-reg) tls-index temp bsp)
289 (let ((tls-index-valid (gen-label))
290 (get-tls-index-lock (gen-label))
291 (release-tls-index-lock (gen-label)))
292 (load-binding-stack-pointer bsp)
293 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
294 (inst add bsp (* binding-size n-word-bytes))
295 (store-binding-stack-pointer bsp)
296 (inst or tls-index tls-index)
297 (inst jmp :ne tls-index-valid)
300 (emit-label get-tls-index-lock)
304 (inst cmpxchg (make-ea-for-symbol-value *tls-index-lock*) temp)
305 (inst jmp :ne get-tls-index-lock)
306 ;; now with the lock held, see if the symbol's tls index has
307 ;; been set in the meantime
308 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
309 (inst or tls-index tls-index)
310 (inst jmp :ne release-tls-index-lock)
311 ;; allocate a new tls-index
312 (load-symbol-value tls-index *free-tls-index*)
313 (inst add tls-index 8) ;XXX surely we can do this more
314 (store-symbol-value tls-index *free-tls-index*) ;succintly
315 (inst sub tls-index 8)
316 (storew tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
317 (emit-label release-tls-index-lock)
318 (store-symbol-value 0 *tls-index-lock*))
320 (emit-label tls-index-valid)
322 (make-ea :qword :base thread-base-tn :scale 1 :index tls-index))
323 (storew temp bsp (- binding-value-slot binding-size))
324 (storew symbol bsp (- binding-symbol-slot binding-size))
325 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls-index)
330 (:args (val :scs (any-reg descriptor-reg))
331 (symbol :scs (descriptor-reg)))
332 (:temporary (:sc unsigned-reg) temp bsp)
334 (load-symbol-value bsp *binding-stack-pointer*)
335 (loadw temp symbol symbol-value-slot other-pointer-lowtag)
336 (inst add bsp (* binding-size n-word-bytes))
337 (store-symbol-value bsp *binding-stack-pointer*)
338 (storew temp bsp (- binding-value-slot binding-size))
339 (storew symbol bsp (- binding-symbol-slot binding-size))
340 (storew val symbol symbol-value-slot other-pointer-lowtag)))
346 (:temporary (:sc unsigned-reg) symbol value bsp tls-index)
348 (load-binding-stack-pointer bsp)
349 (loadw symbol bsp (- binding-symbol-slot binding-size))
350 (loadw value bsp (- binding-value-slot binding-size))
352 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
353 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls-index)
356 (storew 0 bsp (- binding-symbol-slot binding-size))
357 (inst sub bsp (* binding-size n-word-bytes))
358 (store-binding-stack-pointer bsp)))
362 (:temporary (:sc unsigned-reg) symbol value bsp)
364 (load-symbol-value bsp *binding-stack-pointer*)
365 (loadw symbol bsp (- binding-symbol-slot binding-size))
366 (loadw value bsp (- binding-value-slot binding-size))
367 (storew value symbol symbol-value-slot other-pointer-lowtag)
368 (storew 0 bsp (- binding-symbol-slot binding-size))
369 (inst sub bsp (* binding-size n-word-bytes))
370 (store-symbol-value bsp *binding-stack-pointer*)))
373 (define-vop (unbind-to-here)
374 (:args (where :scs (descriptor-reg any-reg)))
375 (:temporary (:sc unsigned-reg) symbol value bsp #!+sb-thread tls-index)
377 (load-binding-stack-pointer bsp)
382 (loadw symbol bsp (- binding-symbol-slot binding-size))
383 (inst or symbol symbol)
385 (loadw value bsp (- binding-value-slot binding-size))
387 (storew value symbol symbol-value-slot other-pointer-lowtag)
389 (loadw tls-index symbol symbol-tls-index-slot other-pointer-lowtag)
391 (inst mov (make-ea :qword :base thread-base-tn :scale 1 :index tls-index)
393 (storew 0 bsp (- binding-symbol-slot binding-size))
396 (inst sub bsp (* binding-size n-word-bytes))
399 (store-binding-stack-pointer bsp)
405 ;;;; closure indexing
407 (define-full-reffer closure-index-ref *
408 closure-info-offset fun-pointer-lowtag
409 (any-reg descriptor-reg) * %closure-index-ref)
411 (define-full-setter set-funcallable-instance-info *
412 funcallable-instance-info-offset fun-pointer-lowtag
413 (any-reg descriptor-reg) * %set-funcallable-instance-info)
415 (define-full-reffer funcallable-instance-info *
416 funcallable-instance-info-offset fun-pointer-lowtag
417 (descriptor-reg any-reg) * %funcallable-instance-info)
419 (define-vop (funcallable-instance-lexenv cell-ref)
420 (:variant funcallable-instance-lexenv-slot fun-pointer-lowtag))
422 (define-vop (closure-ref slot-ref)
423 (:variant closure-info-offset fun-pointer-lowtag))
425 (define-vop (closure-init slot-set)
426 (:variant closure-info-offset fun-pointer-lowtag))
428 ;;;; value cell hackery
430 (define-vop (value-cell-ref cell-ref)
431 (:variant value-cell-value-slot other-pointer-lowtag))
433 (define-vop (value-cell-set cell-set)
434 (:variant value-cell-value-slot other-pointer-lowtag))
436 ;;;; structure hackery
438 (define-vop (instance-length)
440 (:translate %instance-length)
441 (:args (struct :scs (descriptor-reg)))
442 (:results (res :scs (unsigned-reg)))
443 (:result-types positive-fixnum)
445 (loadw res struct 0 instance-pointer-lowtag)
446 (inst shr res n-widetag-bits)))
448 (define-vop (instance-ref slot-ref)
449 (:variant instance-slots-offset instance-pointer-lowtag)
451 (:translate %instance-ref)
452 (:arg-types instance (:constant index)))
454 (define-vop (instance-set slot-set)
456 (:translate %instance-set)
457 (:variant instance-slots-offset instance-pointer-lowtag)
458 (:arg-types instance (:constant index) *))
460 (define-full-reffer instance-index-ref * instance-slots-offset
461 instance-pointer-lowtag (any-reg descriptor-reg) * %instance-ref)
463 (define-full-setter instance-index-set * instance-slots-offset
464 instance-pointer-lowtag (any-reg descriptor-reg) * %instance-set)
467 (defknown %instance-set-conditional (instance index t t) t
470 (define-vop (instance-set-conditional)
471 (:translate %instance-set-conditional)
472 (:args (object :scs (descriptor-reg) :to :eval)
473 (slot :scs (any-reg) :to :result)
474 (old-value :scs (descriptor-reg any-reg) :target rax)
475 (new-value :scs (descriptor-reg any-reg)))
476 (:arg-types instance positive-fixnum * *)
477 (:temporary (:sc descriptor-reg :offset rax-offset
478 :from (:argument 2) :to :result :target result) rax)
479 (:results (result :scs (descriptor-reg any-reg)))
480 ;(:guard (backend-featurep :i486))
485 (inst cmpxchg (make-ea :qword :base object :index slot :scale 1
486 :disp (- (* instance-slots-offset n-word-bytes)
487 instance-pointer-lowtag))
493 ;;;; code object frobbing
495 (define-full-reffer code-header-ref * 0 other-pointer-lowtag
496 (any-reg descriptor-reg) * code-header-ref)
498 (define-full-setter code-header-set * 0 other-pointer-lowtag
499 (any-reg descriptor-reg) * code-header-set)
503 ;;;; raw instance slot accessors
505 (define-vop (raw-instance-ref/word)
506 (:translate %raw-instance-ref/word)
508 (:args (object :scs (descriptor-reg)) (index :scs (any-reg)))
509 (:arg-types * tagged-num)
510 (:temporary (:sc unsigned-reg) tmp)
511 (:results (value :scs (unsigned-reg)))
512 (:result-types unsigned-num)
514 (loadw tmp object 0 instance-pointer-lowtag)
515 (inst shr tmp n-widetag-bits)
523 :disp (- (* (1- instance-slots-offset) n-word-bytes)
524 instance-pointer-lowtag)))))
526 (define-vop (raw-instance-set/word)
527 (:translate %raw-instance-set/word)
529 (:args (object :scs (descriptor-reg))
530 (index :scs (any-reg))
531 (value :scs (unsigned-reg) :target result))
532 (:arg-types * tagged-num unsigned-num)
533 (:temporary (:sc unsigned-reg) tmp)
534 (:results (result :scs (unsigned-reg)))
535 (:result-types unsigned-num)
537 (loadw tmp object 0 instance-pointer-lowtag)
538 (inst shr tmp n-widetag-bits)
545 :disp (- (* (1- instance-slots-offset) n-word-bytes)
546 instance-pointer-lowtag))
548 (move result value)))
550 (define-vop (raw-instance-ref/single)
551 (:translate %raw-instance-ref/single)
553 (:args (object :scs (descriptor-reg))
554 (index :scs (any-reg)))
555 (:arg-types * positive-fixnum)
556 (:temporary (:sc unsigned-reg) tmp)
557 (:results (value :scs (single-reg)))
558 (:result-types single-float)
560 (loadw tmp object 0 instance-pointer-lowtag)
561 (inst shr tmp n-widetag-bits)
569 :disp (- (* (1- instance-slots-offset) n-word-bytes)
570 instance-pointer-lowtag)))))
572 (define-vop (raw-instance-set/single)
573 (:translate %raw-instance-set/single)
575 (:args (object :scs (descriptor-reg))
576 (index :scs (any-reg))
577 (value :scs (single-reg) :target result))
578 (:arg-types * positive-fixnum single-float)
579 (:temporary (:sc unsigned-reg) tmp)
580 (:results (result :scs (single-reg)))
581 (:result-types single-float)
583 (loadw tmp object 0 instance-pointer-lowtag)
584 (inst shr tmp n-widetag-bits)
591 :disp (- (* (1- instance-slots-offset) n-word-bytes)
592 instance-pointer-lowtag))
594 (unless (location= result value)
595 (inst movss result value))))
597 (define-vop (raw-instance-ref/double)
598 (:translate %raw-instance-ref/double)
600 (:args (object :scs (descriptor-reg))
601 (index :scs (any-reg)))
602 (:arg-types * positive-fixnum)
603 (:temporary (:sc unsigned-reg) tmp)
604 (:results (value :scs (double-reg)))
605 (:result-types double-float)
607 (loadw tmp object 0 instance-pointer-lowtag)
608 (inst shr tmp n-widetag-bits)
616 :disp (- (* (1- instance-slots-offset) n-word-bytes)
617 instance-pointer-lowtag)))))
619 (define-vop (raw-instance-set/double)
620 (:translate %raw-instance-set/double)
622 (:args (object :scs (descriptor-reg))
623 (index :scs (any-reg))
624 (value :scs (double-reg) :target result))
625 (:arg-types * positive-fixnum double-float)
626 (:temporary (:sc unsigned-reg) tmp)
627 (:results (result :scs (double-reg)))
628 (:result-types double-float)
630 (loadw tmp object 0 instance-pointer-lowtag)
631 (inst shr tmp n-widetag-bits)
638 :disp (- (* (1- instance-slots-offset) n-word-bytes)
639 instance-pointer-lowtag))
641 (unless (location= result value)
642 (inst movsd result value))))
644 (define-vop (raw-instance-ref/complex-single)
645 (:translate %raw-instance-ref/complex-single)
647 (:args (object :scs (descriptor-reg))
648 (index :scs (any-reg)))
649 (:arg-types * positive-fixnum)
650 (:temporary (:sc unsigned-reg) tmp)
651 (:results (value :scs (complex-single-reg)))
652 (:result-types complex-single-float)
654 (loadw tmp object 0 instance-pointer-lowtag)
655 (inst shr tmp n-widetag-bits)
658 (let ((real-tn (complex-single-reg-real-tn value)))
664 :disp (- (* (1- instance-slots-offset) n-word-bytes)
665 instance-pointer-lowtag))))
666 (let ((imag-tn (complex-single-reg-imag-tn value)))
672 :disp (+ (* (1- instance-slots-offset) n-word-bytes)
674 (- instance-pointer-lowtag)))))))
676 (define-vop (raw-instance-set/complex-single)
677 (:translate %raw-instance-set/complex-single)
679 (:args (object :scs (descriptor-reg))
680 (index :scs (any-reg))
681 (value :scs (complex-single-reg) :target result))
682 (:arg-types * positive-fixnum complex-single-float)
683 (:temporary (:sc unsigned-reg) tmp)
684 (:results (result :scs (complex-single-reg)))
685 (:result-types complex-single-float)
687 (loadw tmp object 0 instance-pointer-lowtag)
688 (inst shr tmp n-widetag-bits)
691 (let ((value-real (complex-single-reg-real-tn value))
692 (result-real (complex-single-reg-real-tn result)))
693 (inst movss (make-ea :dword
696 :disp (- (* (1- instance-slots-offset) n-word-bytes)
697 instance-pointer-lowtag))
699 (unless (location= value-real result-real)
700 (inst movss result-real value-real)))
701 (let ((value-imag (complex-single-reg-imag-tn value))
702 (result-imag (complex-single-reg-imag-tn result)))
703 (inst movss (make-ea :dword
706 :disp (+ (* (1- instance-slots-offset) n-word-bytes)
708 (- instance-pointer-lowtag)))
710 (unless (location= value-imag result-imag)
711 (inst movss result-imag value-imag)))))
713 (define-vop (raw-instance-ref/complex-double)
714 (:translate %raw-instance-ref/complex-double)
716 (:args (object :scs (descriptor-reg))
717 (index :scs (any-reg)))
718 (:arg-types * positive-fixnum)
719 (:temporary (:sc unsigned-reg) tmp)
720 (:results (value :scs (complex-double-reg)))
721 (:result-types complex-double-float)
723 (loadw tmp object 0 instance-pointer-lowtag)
724 (inst shr tmp n-widetag-bits)
727 (let ((real-tn (complex-double-reg-real-tn value)))
733 :disp (- (* (- instance-slots-offset 2) n-word-bytes)
734 instance-pointer-lowtag))))
735 (let ((imag-tn (complex-double-reg-imag-tn value)))
741 :disp (- (* (1- instance-slots-offset) n-word-bytes)
742 instance-pointer-lowtag))))))
744 (define-vop (raw-instance-set/complex-double)
745 (:translate %raw-instance-set/complex-double)
747 (:args (object :scs (descriptor-reg))
748 (index :scs (any-reg))
749 (value :scs (complex-double-reg) :target result))
750 (:arg-types * positive-fixnum complex-double-float)
751 (:temporary (:sc unsigned-reg) tmp)
752 (:results (result :scs (complex-double-reg)))
753 (:result-types complex-double-float)
755 (loadw tmp object 0 instance-pointer-lowtag)
756 (inst shr tmp n-widetag-bits)
759 (let ((value-real (complex-double-reg-real-tn value))
760 (result-real (complex-double-reg-real-tn result)))
761 (inst movsd (make-ea :dword
764 :disp (- (* (- instance-slots-offset 2) n-word-bytes)
765 instance-pointer-lowtag))
767 (unless (location= value-real result-real)
768 (inst movsd result-real value-real)))
769 (let ((value-imag (complex-double-reg-imag-tn value))
770 (result-imag (complex-double-reg-imag-tn result)))
771 (inst movsd (make-ea :dword
774 :disp (- (* (1- instance-slots-offset) n-word-bytes)
775 instance-pointer-lowtag))
777 (unless (location= value-imag result-imag)
778 (inst movsd result-imag value-imag)))))