1 ;;;; the VM definition of various primitive memory access VOPs for
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
15 ;;;; Data object ref/set stuff.
18 (:args (object :scs (descriptor-reg)))
19 (:info name offset lowtag)
21 (:results (result :scs (descriptor-reg any-reg)))
23 (loadw result object offset lowtag)))
25 (define-vop (set-slot)
26 (:args (object :scs (descriptor-reg))
27 (value :scs (descriptor-reg any-reg null zero)))
28 (:info name offset lowtag)
32 (storew value object offset lowtag)))
35 ;;;; Symbol hacking VOPs:
37 ;;; The compiler likes to be able to directly SET symbols.
39 (define-vop (set cell-set)
40 (:variant symbol-value-slot other-pointer-lowtag))
42 ;;; Do a cell ref with an error check for being unbound.
44 (define-vop (checked-cell-ref)
45 (:args (object :scs (descriptor-reg) :target obj-temp))
46 (:results (value :scs (descriptor-reg any-reg)))
49 (:save-p :compute-only)
50 (:temporary (:scs (non-descriptor-reg)) temp)
51 (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
53 ;;; With Symbol-Value, we check that the value isn't the trap object. So
54 ;;; Symbol-Value of NIL is NIL.
56 (define-vop (symbol-value checked-cell-ref)
57 (:translate symbol-value)
59 (move obj-temp object)
60 (loadw value obj-temp symbol-value-slot other-pointer-lowtag)
61 (let ((err-lab (generate-error-code vop unbound-symbol-error obj-temp)))
62 (inst xor temp value unbound-marker-widetag)
63 (inst beq temp zero-tn err-lab)
66 ;;; Like CHECKED-CELL-REF, only we are a predicate to see if the cell is bound.
67 (define-vop (boundp-frob)
68 (:args (object :scs (descriptor-reg)))
72 (:temporary (:scs (descriptor-reg)) value)
73 (:temporary (:scs (non-descriptor-reg)) temp))
75 (define-vop (boundp boundp-frob)
78 (loadw value object symbol-value-slot other-pointer-lowtag)
79 (inst xor temp value unbound-marker-widetag)
81 (inst beq temp zero-tn target)
82 (inst bne temp zero-tn target))
85 (define-vop (fast-symbol-value cell-ref)
86 (:variant symbol-value-slot other-pointer-lowtag)
88 (:translate symbol-value))
90 (define-vop (symbol-hash)
92 (:translate symbol-hash)
93 (:args (symbol :scs (descriptor-reg)))
94 (:results (res :scs (any-reg)))
95 (:result-types positive-fixnum)
96 (:temporary (:scs (any-reg)) temp)
98 ;; The symbol-hash slot of NIL holds NIL because it is also the
99 ;; cdr slot, so we have to strip off the two low bits to make sure
100 ;; it is a fixnum. The lowtag selection magic that is required to
101 ;; ensure this is explained in the comment in objdef.lisp
103 ;; wow, MIPS sucks (or I do) -- CSR, 2004-05-20
104 (inst li temp (fixnumize -1))
105 (loadw res symbol symbol-hash-slot other-pointer-lowtag)
106 (inst and res temp)))
108 ;;;; Fdefinition (fdefn) objects.
110 (define-vop (fdefn-fun cell-ref)
111 (:variant fdefn-fun-slot other-pointer-lowtag))
113 (define-vop (safe-fdefn-fun)
114 (:args (object :scs (descriptor-reg) :target obj-temp))
115 (:results (value :scs (descriptor-reg any-reg)))
117 (:save-p :compute-only)
118 (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
120 (move obj-temp object)
121 (loadw value obj-temp fdefn-fun-slot other-pointer-lowtag)
122 (let ((err-lab (generate-error-code vop undefined-fun-error obj-temp)))
123 (inst beq value null-tn err-lab))
126 (define-vop (set-fdefn-fun)
128 (:translate (setf fdefn-fun))
129 (:args (function :scs (descriptor-reg) :target result)
130 (fdefn :scs (descriptor-reg)))
131 (:temporary (:scs (interior-reg)) lip)
132 (:temporary (:scs (non-descriptor-reg)) type)
133 (:results (result :scs (descriptor-reg)))
135 (let ((normal-fn (gen-label)))
136 (load-type type function (- fun-pointer-lowtag))
138 (inst xor type simple-fun-header-widetag)
139 (inst beq type zero-tn normal-fn)
140 (inst addu lip function
141 (- (ash simple-fun-code-offset word-shift)
143 (inst li lip (make-fixup "closure_tramp" :foreign))
144 (emit-label normal-fn)
145 (storew lip fdefn fdefn-raw-addr-slot other-pointer-lowtag)
146 (storew function fdefn fdefn-fun-slot other-pointer-lowtag)
147 (move result function))))
149 (define-vop (fdefn-makunbound)
151 (:translate fdefn-makunbound)
152 (:args (fdefn :scs (descriptor-reg) :target result))
153 (:temporary (:scs (non-descriptor-reg)) temp)
154 (:results (result :scs (descriptor-reg)))
156 (storew null-tn fdefn fdefn-fun-slot other-pointer-lowtag)
157 (inst li temp (make-fixup "undefined_tramp" :foreign))
158 (storew temp fdefn fdefn-raw-addr-slot other-pointer-lowtag)
159 (move result fdefn)))
163 ;;;; Binding and Unbinding.
165 ;;; BIND -- Establish VAL as a binding for SYMBOL. Save the old value and
166 ;;; the symbol on the binding stack and stuff the new value into the
170 (:args (val :scs (any-reg descriptor-reg))
171 (symbol :scs (descriptor-reg)))
172 (:temporary (:scs (descriptor-reg)) temp)
174 (loadw temp symbol symbol-value-slot other-pointer-lowtag)
175 (inst addu bsp-tn bsp-tn (* 2 n-word-bytes))
176 (storew temp bsp-tn (- binding-value-slot binding-size))
177 (storew symbol bsp-tn (- binding-symbol-slot binding-size))
178 (storew val symbol symbol-value-slot other-pointer-lowtag)))
182 (:temporary (:scs (descriptor-reg)) symbol value)
184 (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
185 (loadw value bsp-tn (- binding-value-slot binding-size))
186 (storew value symbol symbol-value-slot other-pointer-lowtag)
187 (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
188 (storew zero-tn bsp-tn (- binding-value-slot binding-size))
189 (inst addu bsp-tn bsp-tn (* -2 n-word-bytes))))
192 (define-vop (unbind-to-here)
193 (:args (arg :scs (descriptor-reg any-reg) :target where))
194 (:temporary (:scs (any-reg) :from (:argument 0)) where)
195 (:temporary (:scs (descriptor-reg)) symbol value)
197 (let ((loop (gen-label))
201 (inst beq where bsp-tn done)
205 (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
206 (inst beq symbol zero-tn skip)
207 (loadw value bsp-tn (- binding-value-slot binding-size))
208 (storew value symbol symbol-value-slot other-pointer-lowtag)
209 (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
212 (storew zero-tn bsp-tn (- binding-value-slot binding-size))
213 (inst addu bsp-tn bsp-tn (* -2 n-word-bytes))
214 (inst bne where bsp-tn loop)
221 ;;;; Closure indexing.
223 (define-full-reffer closure-index-ref *
224 closure-info-offset fun-pointer-lowtag
225 (descriptor-reg any-reg) * %closure-index-ref)
227 (define-full-setter set-funcallable-instance-info *
228 funcallable-instance-info-offset fun-pointer-lowtag
229 (descriptor-reg any-reg null zero) * %set-funcallable-instance-info)
231 (define-full-reffer funcallable-instance-info *
232 funcallable-instance-info-offset fun-pointer-lowtag
233 (descriptor-reg any-reg) * %funcallable-instance-info)
235 (define-vop (closure-ref slot-ref)
236 (:variant closure-info-offset fun-pointer-lowtag))
238 (define-vop (closure-init slot-set)
239 (:variant closure-info-offset fun-pointer-lowtag))
241 ;;;; Value Cell hackery.
243 (define-vop (value-cell-ref cell-ref)
244 (:variant value-cell-value-slot other-pointer-lowtag))
246 (define-vop (value-cell-set cell-set)
247 (:variant value-cell-value-slot other-pointer-lowtag))
251 ;;;; Instance hackery:
253 (define-vop (instance-length)
255 (:translate %instance-length)
256 (:args (struct :scs (descriptor-reg)))
257 (:results (res :scs (unsigned-reg)))
258 (:result-types positive-fixnum)
260 (loadw res struct 0 instance-pointer-lowtag)
261 (inst srl res n-widetag-bits)))
263 (define-full-reffer instance-index-ref * instance-slots-offset
264 instance-pointer-lowtag (descriptor-reg any-reg) * %instance-ref)
266 (define-full-setter instance-index-set * instance-slots-offset
267 instance-pointer-lowtag (descriptor-reg any-reg null zero) * %instance-set)
271 ;;;; Code object frobbing.
273 (define-full-reffer code-header-ref * 0 other-pointer-lowtag
274 (descriptor-reg any-reg) * code-header-ref)
276 (define-full-setter code-header-set * 0 other-pointer-lowtag
277 (descriptor-reg any-reg null zero) * code-header-set)
281 ;;;; raw instance slot accessors
283 (define-vop (raw-instance-ref/word)
284 (:translate %raw-instance-ref/word)
286 (:args (object :scs (descriptor-reg))
287 (index :scs (any-reg)))
288 (:arg-types * positive-fixnum)
289 (:results (value :scs (unsigned-reg)))
290 (:temporary (:scs (non-descriptor-reg)) offset)
291 (:temporary (:scs (interior-reg)) lip)
292 (:result-types unsigned-num)
294 (loadw offset object 0 instance-pointer-lowtag)
295 (inst srl offset n-widetag-bits)
297 (inst subu offset index)
298 (inst subu offset n-word-bytes)
299 (inst addu lip offset object)
300 (inst lw value lip (- (* instance-slots-offset n-word-bytes)
301 instance-pointer-lowtag))))
303 (define-vop (raw-instance-set/word)
304 (:translate %raw-instance-set/word)
306 (:args (object :scs (descriptor-reg))
307 (index :scs (any-reg))
308 (value :scs (unsigned-reg) :target result))
309 (:arg-types * positive-fixnum unsigned-num)
310 (:results (result :scs (unsigned-reg)))
311 (:temporary (:scs (non-descriptor-reg)) offset)
312 (:temporary (:scs (interior-reg)) lip)
313 (:result-types unsigned-num)
315 (loadw offset object 0 instance-pointer-lowtag)
316 (inst srl offset n-widetag-bits)
318 (inst subu offset index)
319 (inst subu offset n-word-bytes)
320 (inst addu lip offset object)
321 (inst sw value lip (- (* instance-slots-offset n-word-bytes)
322 instance-pointer-lowtag))
323 (move result value)))
325 (define-vop (raw-instance-ref/single)
326 (:translate %raw-instance-ref/single)
328 (:args (object :scs (descriptor-reg))
329 (index :scs (any-reg)))
330 (:arg-types * positive-fixnum)
331 (:results (value :scs (single-reg)))
332 (:temporary (:scs (non-descriptor-reg)) offset)
333 (:temporary (:scs (interior-reg)) lip)
334 (:result-types single-float)
336 (loadw offset object 0 instance-pointer-lowtag)
337 (inst srl offset n-widetag-bits)
339 (inst subu offset index)
340 (inst subu offset n-word-bytes)
341 (inst addu lip offset object)
342 (inst lwc1 value lip (- (* instance-slots-offset n-word-bytes)
343 instance-pointer-lowtag))))
345 (define-vop (raw-instance-set/single)
346 (:translate %raw-instance-set/single)
348 (:args (object :scs (descriptor-reg))
349 (index :scs (any-reg))
350 (value :scs (single-reg) :target result))
351 (:arg-types * positive-fixnum single-float)
352 (:results (result :scs (single-reg)))
353 (:temporary (:scs (non-descriptor-reg)) offset)
354 (:temporary (:scs (interior-reg)) lip)
355 (:result-types single-float)
357 (loadw offset object 0 instance-pointer-lowtag)
358 (inst srl offset n-widetag-bits)
360 (inst subu offset index)
361 (inst subu offset n-word-bytes)
362 (inst addu lip offset object)
363 (inst swc1 value lip (- (* instance-slots-offset n-word-bytes)
364 instance-pointer-lowtag))
365 (unless (location= result value)
366 (inst fmove :single result value))))
368 (define-vop (raw-instance-ref/double)
369 (:translate %raw-instance-ref/double)
371 (:args (object :scs (descriptor-reg))
372 (index :scs (any-reg)))
373 (:arg-types * positive-fixnum)
374 (:results (value :scs (double-reg)))
375 (:temporary (:scs (non-descriptor-reg)) offset)
376 (:temporary (:scs (interior-reg)) lip)
377 (:result-types double-float)
379 (loadw offset object 0 instance-pointer-lowtag)
380 (inst srl offset n-widetag-bits)
382 (inst subu offset index)
383 (inst subu offset (* 2 n-word-bytes))
384 (inst addu lip offset object)
385 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
386 instance-pointer-lowtag)))
387 (ecase *backend-byte-order*
388 (:big-endian (inst lwc1 value lip immediate-offset))
389 (:little-endian (inst lwc1-odd value lip immediate-offset))))
390 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
391 instance-pointer-lowtag)))
392 (ecase *backend-byte-order*
393 (:big-endian (inst lwc1-odd value lip immediate-offset))
394 (:little-endian (inst lwc1 value lip immediate-offset))))))
396 (define-vop (raw-instance-set/double)
397 (:translate %raw-instance-set/double)
399 (:args (object :scs (descriptor-reg))
400 (index :scs (any-reg))
401 (value :scs (double-reg) :target result))
402 (:arg-types * positive-fixnum double-float)
403 (:results (result :scs (double-reg)))
404 (:temporary (:scs (non-descriptor-reg)) offset)
405 (:temporary (:scs (interior-reg)) lip)
406 (:result-types double-float)
408 (loadw offset object 0 instance-pointer-lowtag)
409 (inst srl offset n-widetag-bits)
411 (inst subu offset index)
412 (inst subu offset (* 2 n-word-bytes))
413 (inst addu lip offset object)
414 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
415 instance-pointer-lowtag)))
416 (ecase *backend-byte-order*
417 (:big-endian (inst swc1 value lip immediate-offset))
418 (:little-endian (inst swc1-odd value lip immediate-offset))))
419 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
420 instance-pointer-lowtag)))
421 (ecase *backend-byte-order*
422 (:big-endian (inst swc1-odd value lip immediate-offset))
423 (:little-endian (inst swc1 value lip immediate-offset))))
424 (unless (location= result value)
425 (inst fmove :double result value))))
427 (define-vop (raw-instance-ref/complex-single)
428 (:translate %raw-instance-ref/complex-single)
430 (:args (object :scs (descriptor-reg))
431 (index :scs (any-reg)))
432 (:arg-types * positive-fixnum)
433 (:results (value :scs (complex-single-reg)))
434 (:temporary (:scs (non-descriptor-reg)) offset)
435 (:temporary (:scs (interior-reg)) lip)
436 (:result-types complex-single-float)
438 (loadw offset object 0 instance-pointer-lowtag)
439 (inst srl offset n-widetag-bits)
441 (inst subu offset index)
442 (inst subu offset (* 2 n-word-bytes))
443 (inst addu lip offset object)
445 (complex-single-reg-real-tn value)
447 (- (* instance-slots-offset n-word-bytes)
448 instance-pointer-lowtag))
450 (complex-single-reg-imag-tn value)
452 (- (* (1+ instance-slots-offset) n-word-bytes)
453 instance-pointer-lowtag))))
455 (define-vop (raw-instance-set/complex-single)
456 (:translate %raw-instance-set/complex-single)
458 (:args (object :scs (descriptor-reg))
459 (index :scs (any-reg))
460 (value :scs (complex-single-reg) :target result))
461 (:arg-types * positive-fixnum complex-single-float)
462 (:results (result :scs (complex-single-reg)))
463 (:temporary (:scs (non-descriptor-reg)) offset)
464 (:temporary (:scs (interior-reg)) lip)
465 (:result-types complex-single-float)
467 (loadw offset object 0 instance-pointer-lowtag)
468 (inst srl offset n-widetag-bits)
470 (inst subu offset index)
471 (inst subu offset (* 2 n-word-bytes))
472 (inst addu lip offset object)
473 (let ((value-real (complex-single-reg-real-tn value))
474 (result-real (complex-single-reg-real-tn result)))
478 (- (* instance-slots-offset n-word-bytes)
479 instance-pointer-lowtag))
480 (unless (location= result-real value-real)
481 (inst fmove :single result-real value-real)))
482 (let ((value-imag (complex-single-reg-imag-tn value))
483 (result-imag (complex-single-reg-imag-tn result)))
487 (- (* (1+ instance-slots-offset) n-word-bytes)
488 instance-pointer-lowtag))
489 (unless (location= result-imag value-imag)
490 (inst fmove :single result-imag value-imag)))))
492 (define-vop (raw-instance-ref/complex-double)
493 (:translate %raw-instance-ref/complex-double)
495 (:args (object :scs (descriptor-reg))
496 (index :scs (any-reg)))
497 (:arg-types * positive-fixnum)
498 (:results (value :scs (complex-double-reg)))
499 (:temporary (:scs (non-descriptor-reg)) offset)
500 (:temporary (:scs (interior-reg)) lip)
501 (:result-types complex-double-float)
503 (loadw offset object 0 instance-pointer-lowtag)
504 (inst srl offset n-widetag-bits)
506 (inst subu offset index)
507 (inst subu offset (* 4 n-word-bytes))
508 (inst addu lip offset object)
509 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
510 instance-pointer-lowtag)))
511 (ecase *backend-byte-order*
512 (:big-endian (inst lwc1
513 (complex-double-reg-real-tn value)
516 (:little-endian (inst lwc1-odd
517 (complex-double-reg-real-tn value)
520 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
521 instance-pointer-lowtag)))
522 (ecase *backend-byte-order*
523 (:big-endian (inst lwc1-odd
524 (complex-double-reg-real-tn value)
527 (:little-endian (inst lwc1
528 (complex-double-reg-real-tn value)
531 (let ((immediate-offset (- (* (+ instance-slots-offset 2) n-word-bytes)
532 instance-pointer-lowtag)))
533 (ecase *backend-byte-order*
534 (:big-endian (inst lwc1
535 (complex-double-reg-imag-tn value)
538 (:little-endian (inst lwc1-odd
539 (complex-double-reg-imag-tn value)
542 (let ((immediate-offset (- (* (+ instance-slots-offset 3) n-word-bytes)
543 instance-pointer-lowtag)))
544 (ecase *backend-byte-order*
545 (:big-endian (inst lwc1-odd
546 (complex-double-reg-imag-tn value)
549 (:little-endian (inst lwc1
550 (complex-double-reg-imag-tn value)
552 immediate-offset))))))
554 (define-vop (raw-instance-set/complex-double)
555 (:translate %raw-instance-set/complex-double)
557 (:args (object :scs (descriptor-reg))
558 (index :scs (any-reg))
559 (value :scs (complex-double-reg) :target result))
560 (:arg-types * positive-fixnum complex-double-float)
561 (:results (result :scs (complex-double-reg)))
562 (:temporary (:scs (non-descriptor-reg)) offset)
563 (:temporary (:scs (interior-reg)) lip)
564 (:result-types complex-double-float)
566 (loadw offset object 0 instance-pointer-lowtag)
567 (inst srl offset n-widetag-bits)
569 (inst subu offset index)
570 (inst subu offset (* 4 n-word-bytes))
571 (inst addu lip offset object)
572 (let ((value-real (complex-double-reg-real-tn value))
573 (result-real (complex-double-reg-real-tn result)))
574 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
575 instance-pointer-lowtag)))
576 (ecase *backend-byte-order*
577 (:big-endian (inst swc1
581 (:little-endian (inst swc1-odd
585 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
586 instance-pointer-lowtag)))
587 (ecase *backend-byte-order*
588 (:big-endian (inst swc1-odd
592 (:little-endian (inst swc1
596 (unless (location= result-real value-real)
597 (inst fmove :double result-real value-real)))
598 (let ((value-imag (complex-double-reg-imag-tn value))
599 (result-imag (complex-double-reg-imag-tn result)))
600 (let ((immediate-offset (- (* (+ instance-slots-offset 2) n-word-bytes)
601 instance-pointer-lowtag)))
602 (ecase *backend-byte-order*
603 (:big-endian (inst swc1
607 (:little-endian (inst swc1-odd
611 (let ((immediate-offset (- (* (+ instance-slots-offset 3) n-word-bytes)
612 instance-pointer-lowtag)))
613 (ecase *backend-byte-order*
614 (:big-endian (inst swc1-odd
618 (:little-endian (inst swc1
622 (unless (location= result-imag value-imag)
623 (inst fmove :double result-imag value-imag)))))