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-value-slot binding-size))
188 (storew zero-tn bsp-tn (- binding-symbol-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-value-slot binding-size))
210 (storew zero-tn bsp-tn (- binding-symbol-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 (funcallable-instance-lexenv cell-ref)
236 (:variant funcallable-instance-lexenv-slot fun-pointer-lowtag))
238 (define-vop (closure-ref slot-ref)
239 (:variant closure-info-offset fun-pointer-lowtag))
241 (define-vop (closure-init slot-set)
242 (:variant closure-info-offset fun-pointer-lowtag))
245 ;;;; Value Cell hackery.
247 (define-vop (value-cell-ref cell-ref)
248 (:variant value-cell-value-slot other-pointer-lowtag))
250 (define-vop (value-cell-set cell-set)
251 (:variant value-cell-value-slot other-pointer-lowtag))
255 ;;;; Instance hackery:
257 (define-vop (instance-length)
259 (:translate %instance-length)
260 (:args (struct :scs (descriptor-reg)))
261 (:results (res :scs (unsigned-reg)))
262 (:result-types positive-fixnum)
264 (loadw res struct 0 instance-pointer-lowtag)
265 (inst srl res n-widetag-bits)))
267 (define-full-reffer instance-index-ref * instance-slots-offset
268 instance-pointer-lowtag (descriptor-reg any-reg) * %instance-ref)
270 (define-full-setter instance-index-set * instance-slots-offset
271 instance-pointer-lowtag (descriptor-reg any-reg null zero) * %instance-set)
275 ;;;; Code object frobbing.
277 (define-full-reffer code-header-ref * 0 other-pointer-lowtag
278 (descriptor-reg any-reg) * code-header-ref)
280 (define-full-setter code-header-set * 0 other-pointer-lowtag
281 (descriptor-reg any-reg null zero) * code-header-set)
285 ;;;; raw instance slot accessors
287 (define-vop (raw-instance-ref/word)
288 (:translate %raw-instance-ref/word)
290 (:args (object :scs (descriptor-reg))
291 (index :scs (any-reg)))
292 (:arg-types * positive-fixnum)
293 (:results (value :scs (unsigned-reg)))
294 (:temporary (:scs (non-descriptor-reg)) offset)
295 (:temporary (:scs (interior-reg)) lip)
296 (:result-types unsigned-num)
298 (loadw offset object 0 instance-pointer-lowtag)
299 (inst srl offset n-widetag-bits)
301 (inst subu offset index)
302 (inst subu offset n-word-bytes)
303 (inst addu lip offset object)
304 (inst lw value lip (- (* instance-slots-offset n-word-bytes)
305 instance-pointer-lowtag))))
307 (define-vop (raw-instance-set/word)
308 (:translate %raw-instance-set/word)
310 (:args (object :scs (descriptor-reg))
311 (index :scs (any-reg))
312 (value :scs (unsigned-reg) :target result))
313 (:arg-types * positive-fixnum unsigned-num)
314 (:results (result :scs (unsigned-reg)))
315 (:temporary (:scs (non-descriptor-reg)) offset)
316 (:temporary (:scs (interior-reg)) lip)
317 (:result-types unsigned-num)
319 (loadw offset object 0 instance-pointer-lowtag)
320 (inst srl offset n-widetag-bits)
322 (inst subu offset index)
323 (inst subu offset n-word-bytes)
324 (inst addu lip offset object)
325 (inst sw value lip (- (* instance-slots-offset n-word-bytes)
326 instance-pointer-lowtag))
327 (move result value)))
329 (define-vop (raw-instance-ref/single)
330 (:translate %raw-instance-ref/single)
332 (:args (object :scs (descriptor-reg))
333 (index :scs (any-reg)))
334 (:arg-types * positive-fixnum)
335 (:results (value :scs (single-reg)))
336 (:temporary (:scs (non-descriptor-reg)) offset)
337 (:temporary (:scs (interior-reg)) lip)
338 (:result-types single-float)
340 (loadw offset object 0 instance-pointer-lowtag)
341 (inst srl offset n-widetag-bits)
343 (inst subu offset index)
344 (inst subu offset n-word-bytes)
345 (inst addu lip offset object)
346 (inst lwc1 value lip (- (* instance-slots-offset n-word-bytes)
347 instance-pointer-lowtag))))
349 (define-vop (raw-instance-set/single)
350 (:translate %raw-instance-set/single)
352 (:args (object :scs (descriptor-reg))
353 (index :scs (any-reg))
354 (value :scs (single-reg) :target result))
355 (:arg-types * positive-fixnum single-float)
356 (:results (result :scs (single-reg)))
357 (:temporary (:scs (non-descriptor-reg)) offset)
358 (:temporary (:scs (interior-reg)) lip)
359 (:result-types single-float)
361 (loadw offset object 0 instance-pointer-lowtag)
362 (inst srl offset n-widetag-bits)
364 (inst subu offset index)
365 (inst subu offset n-word-bytes)
366 (inst addu lip offset object)
367 (inst swc1 value lip (- (* instance-slots-offset n-word-bytes)
368 instance-pointer-lowtag))
369 (unless (location= result value)
370 (inst fmove :single result value))))
372 (define-vop (raw-instance-ref/double)
373 (:translate %raw-instance-ref/double)
375 (:args (object :scs (descriptor-reg))
376 (index :scs (any-reg)))
377 (:arg-types * positive-fixnum)
378 (:results (value :scs (double-reg)))
379 (:temporary (:scs (non-descriptor-reg)) offset)
380 (:temporary (:scs (interior-reg)) lip)
381 (:result-types double-float)
383 (loadw offset object 0 instance-pointer-lowtag)
384 (inst srl offset n-widetag-bits)
386 (inst subu offset index)
387 (inst subu offset (* 2 n-word-bytes))
388 (inst addu lip offset object)
389 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
390 instance-pointer-lowtag)))
391 (ecase *backend-byte-order*
392 (:big-endian (inst lwc1 value lip immediate-offset))
393 (:little-endian (inst lwc1-odd value lip immediate-offset))))
394 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
395 instance-pointer-lowtag)))
396 (ecase *backend-byte-order*
397 (:big-endian (inst lwc1-odd value lip immediate-offset))
398 (:little-endian (inst lwc1 value lip immediate-offset))))))
400 (define-vop (raw-instance-set/double)
401 (:translate %raw-instance-set/double)
403 (:args (object :scs (descriptor-reg))
404 (index :scs (any-reg))
405 (value :scs (double-reg) :target result))
406 (:arg-types * positive-fixnum double-float)
407 (:results (result :scs (double-reg)))
408 (:temporary (:scs (non-descriptor-reg)) offset)
409 (:temporary (:scs (interior-reg)) lip)
410 (:result-types double-float)
412 (loadw offset object 0 instance-pointer-lowtag)
413 (inst srl offset n-widetag-bits)
415 (inst subu offset index)
416 (inst subu offset (* 2 n-word-bytes))
417 (inst addu lip offset object)
418 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
419 instance-pointer-lowtag)))
420 (ecase *backend-byte-order*
421 (:big-endian (inst swc1 value lip immediate-offset))
422 (:little-endian (inst swc1-odd value lip immediate-offset))))
423 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
424 instance-pointer-lowtag)))
425 (ecase *backend-byte-order*
426 (:big-endian (inst swc1-odd value lip immediate-offset))
427 (:little-endian (inst swc1 value lip immediate-offset))))
428 (unless (location= result value)
429 (inst fmove :double result value))))
431 (define-vop (raw-instance-ref/complex-single)
432 (:translate %raw-instance-ref/complex-single)
434 (:args (object :scs (descriptor-reg))
435 (index :scs (any-reg)))
436 (:arg-types * positive-fixnum)
437 (:results (value :scs (complex-single-reg)))
438 (:temporary (:scs (non-descriptor-reg)) offset)
439 (:temporary (:scs (interior-reg)) lip)
440 (:result-types complex-single-float)
442 (loadw offset object 0 instance-pointer-lowtag)
443 (inst srl offset n-widetag-bits)
445 (inst subu offset index)
446 (inst subu offset (* 2 n-word-bytes))
447 (inst addu lip offset object)
449 (complex-single-reg-real-tn value)
451 (- (* instance-slots-offset n-word-bytes)
452 instance-pointer-lowtag))
454 (complex-single-reg-imag-tn value)
456 (- (* (1+ instance-slots-offset) n-word-bytes)
457 instance-pointer-lowtag))))
459 (define-vop (raw-instance-set/complex-single)
460 (:translate %raw-instance-set/complex-single)
462 (:args (object :scs (descriptor-reg))
463 (index :scs (any-reg))
464 (value :scs (complex-single-reg) :target result))
465 (:arg-types * positive-fixnum complex-single-float)
466 (:results (result :scs (complex-single-reg)))
467 (:temporary (:scs (non-descriptor-reg)) offset)
468 (:temporary (:scs (interior-reg)) lip)
469 (:result-types complex-single-float)
471 (loadw offset object 0 instance-pointer-lowtag)
472 (inst srl offset n-widetag-bits)
474 (inst subu offset index)
475 (inst subu offset (* 2 n-word-bytes))
476 (inst addu lip offset object)
477 (let ((value-real (complex-single-reg-real-tn value))
478 (result-real (complex-single-reg-real-tn result)))
482 (- (* instance-slots-offset n-word-bytes)
483 instance-pointer-lowtag))
484 (unless (location= result-real value-real)
485 (inst fmove :single result-real value-real)))
486 (let ((value-imag (complex-single-reg-imag-tn value))
487 (result-imag (complex-single-reg-imag-tn result)))
491 (- (* (1+ instance-slots-offset) n-word-bytes)
492 instance-pointer-lowtag))
493 (unless (location= result-imag value-imag)
494 (inst fmove :single result-imag value-imag)))))
496 (define-vop (raw-instance-ref/complex-double)
497 (:translate %raw-instance-ref/complex-double)
499 (:args (object :scs (descriptor-reg))
500 (index :scs (any-reg)))
501 (:arg-types * positive-fixnum)
502 (:results (value :scs (complex-double-reg)))
503 (:temporary (:scs (non-descriptor-reg)) offset)
504 (:temporary (:scs (interior-reg)) lip)
505 (:result-types complex-double-float)
507 (loadw offset object 0 instance-pointer-lowtag)
508 (inst srl offset n-widetag-bits)
510 (inst subu offset index)
511 (inst subu offset (* 4 n-word-bytes))
512 (inst addu lip offset object)
513 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
514 instance-pointer-lowtag)))
515 (ecase *backend-byte-order*
516 (:big-endian (inst lwc1
517 (complex-double-reg-real-tn value)
520 (:little-endian (inst lwc1-odd
521 (complex-double-reg-real-tn value)
524 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
525 instance-pointer-lowtag)))
526 (ecase *backend-byte-order*
527 (:big-endian (inst lwc1-odd
528 (complex-double-reg-real-tn value)
531 (:little-endian (inst lwc1
532 (complex-double-reg-real-tn value)
535 (let ((immediate-offset (- (* (+ instance-slots-offset 2) n-word-bytes)
536 instance-pointer-lowtag)))
537 (ecase *backend-byte-order*
538 (:big-endian (inst lwc1
539 (complex-double-reg-imag-tn value)
542 (:little-endian (inst lwc1-odd
543 (complex-double-reg-imag-tn value)
546 (let ((immediate-offset (- (* (+ instance-slots-offset 3) n-word-bytes)
547 instance-pointer-lowtag)))
548 (ecase *backend-byte-order*
549 (:big-endian (inst lwc1-odd
550 (complex-double-reg-imag-tn value)
553 (:little-endian (inst lwc1
554 (complex-double-reg-imag-tn value)
556 immediate-offset))))))
558 (define-vop (raw-instance-set/complex-double)
559 (:translate %raw-instance-set/complex-double)
561 (:args (object :scs (descriptor-reg))
562 (index :scs (any-reg))
563 (value :scs (complex-double-reg) :target result))
564 (:arg-types * positive-fixnum complex-double-float)
565 (:results (result :scs (complex-double-reg)))
566 (:temporary (:scs (non-descriptor-reg)) offset)
567 (:temporary (:scs (interior-reg)) lip)
568 (:result-types complex-double-float)
570 (loadw offset object 0 instance-pointer-lowtag)
571 (inst srl offset n-widetag-bits)
573 (inst subu offset index)
574 (inst subu offset (* 4 n-word-bytes))
575 (inst addu lip offset object)
576 (let ((value-real (complex-double-reg-real-tn value))
577 (result-real (complex-double-reg-real-tn result)))
578 (let ((immediate-offset (- (* instance-slots-offset n-word-bytes)
579 instance-pointer-lowtag)))
580 (ecase *backend-byte-order*
581 (:big-endian (inst swc1
585 (:little-endian (inst swc1-odd
589 (let ((immediate-offset (- (* (1+ instance-slots-offset) n-word-bytes)
590 instance-pointer-lowtag)))
591 (ecase *backend-byte-order*
592 (:big-endian (inst swc1-odd
596 (:little-endian (inst swc1
600 (unless (location= result-real value-real)
601 (inst fmove :double result-real value-real)))
602 (let ((value-imag (complex-double-reg-imag-tn value))
603 (result-imag (complex-double-reg-imag-tn result)))
604 (let ((immediate-offset (- (* (+ instance-slots-offset 2) n-word-bytes)
605 instance-pointer-lowtag)))
606 (ecase *backend-byte-order*
607 (:big-endian (inst swc1
611 (:little-endian (inst swc1-odd
615 (let ((immediate-offset (- (* (+ instance-slots-offset 3) n-word-bytes)
616 instance-pointer-lowtag)))
617 (ecase *backend-byte-order*
618 (:big-endian (inst swc1-odd
622 (:little-endian (inst swc1
626 (unless (location= result-imag value-imag)
627 (inst fmove :double result-imag value-imag)))))