1 ;;;; the VM definition of various primitive memory access VOPs for the
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 #+gengc remember)
34 (storew-and-remember-slot value object offset lowtag)
35 (storew value object offset lowtag))
37 (storew value object offset lowtag)))
39 ;;;; symbol hacking VOPs
41 ;;; The compiler likes to be able to directly SET symbols.
42 (define-vop (set cell-set)
43 (:variant symbol-value-slot other-pointer-type))
45 ;;; Do a cell ref with an error check for being unbound.
46 (define-vop (checked-cell-ref)
47 (:args (object :scs (descriptor-reg) :target obj-temp))
48 (:results (value :scs (descriptor-reg any-reg)))
51 (:save-p :compute-only)
52 (:temporary (:scs (non-descriptor-reg)) temp)
53 (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
55 ;;; With SYMBOL-VALUE, we check that the value isn't the trap object.
56 ;;; So SYMBOL-VALUE of NIL is NIL.
57 (define-vop (symbol-value checked-cell-ref)
58 (:translate symbol-value)
60 (move object obj-temp)
61 (loadw value obj-temp symbol-value-slot other-pointer-type)
62 (let ((err-lab (generate-error-code vop unbound-symbol-error obj-temp)))
63 (inst xor value unbound-marker-type temp)
64 (inst beq temp err-lab))))
66 ;;; Like CHECKED-CELL-REF, only we are a predicate to see if the cell
68 (define-vop (boundp-frob)
69 (:args (object :scs (descriptor-reg)))
73 (:temporary (:scs (descriptor-reg)) value)
74 (:temporary (:scs (non-descriptor-reg)) temp))
76 (define-vop (boundp boundp-frob)
79 (loadw value object symbol-value-slot other-pointer-type)
80 (inst xor value unbound-marker-type temp)
82 (inst beq temp target)
83 (inst bne temp target))))
85 (define-vop (fast-symbol-value cell-ref)
86 (:variant symbol-value-slot other-pointer-type)
88 (:translate symbol-value))
92 ;;;; FDEFINITION (fdefn) objects
94 (define-vop (fdefn-function cell-ref)
95 (:variant fdefn-function-slot other-pointer-type))
97 (define-vop (safe-fdefn-function)
98 (:args (object :scs (descriptor-reg) :target obj-temp))
99 (:results (value :scs (descriptor-reg any-reg)))
101 (:save-p :compute-only)
102 (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
103 (:temporary (:scs (non-descriptor-reg)) temp)
105 (move object obj-temp)
106 (loadw value obj-temp fdefn-function-slot other-pointer-type)
107 (let ((err-lab (generate-error-code vop undefined-symbol-error obj-temp)))
108 (inst cmpeq value null-tn temp)
109 (inst bne temp err-lab))))
111 (define-vop (set-fdefn-function)
113 (:translate (setf fdefn-function))
114 (:args (function :scs (descriptor-reg) :target result)
115 (fdefn :scs (descriptor-reg)))
116 (:temporary (:scs (interior-reg)) lip)
117 (:temporary (:scs (non-descriptor-reg)) type)
118 (:results (result :scs (descriptor-reg)))
120 (let ((normal-fn (gen-label)))
121 (load-type type function (- function-pointer-type))
122 (inst xor type function-header-type type)
124 (- (ash function-code-offset word-shift) function-pointer-type)
126 (inst beq type normal-fn)
127 (inst li (make-fixup "closure_tramp" :foreign) lip)
128 (emit-label normal-fn)
129 (storew lip fdefn fdefn-raw-addr-slot other-pointer-type)
130 (storew function fdefn fdefn-function-slot other-pointer-type)
131 (move function result))))
134 (define-vop (fdefn-makunbound)
136 (:translate fdefn-makunbound)
137 (:args (fdefn :scs (descriptor-reg) :target result))
138 (:temporary (:scs (non-descriptor-reg)) temp)
139 (:results (result :scs (descriptor-reg)))
141 (storew null-tn fdefn fdefn-function-slot other-pointer-type)
142 (inst li (make-fixup "undefined_tramp" :foreign) temp)
144 (storew temp fdefn fdefn-raw-addr-slot other-pointer-type)))
146 ;;;; binding and Unbinding
148 ;;; Establish VAL as a binding for SYMBOL. Save the old value and the
149 ;;; symbol on the binding stack and stuff the new value into the symbol.
151 (:args (val :scs (any-reg descriptor-reg))
152 (symbol :scs (descriptor-reg)))
153 (:temporary (:scs (descriptor-reg)) temp)
155 (loadw temp symbol symbol-value-slot other-pointer-type)
156 (inst addq bsp-tn (* 2 word-bytes) bsp-tn)
157 (storew temp bsp-tn (- binding-value-slot binding-size))
158 (storew symbol bsp-tn (- binding-symbol-slot binding-size))
159 (#+gengc storew-and-remember-slot #-gengc storew
160 val symbol symbol-value-slot other-pointer-type)))
164 (:temporary (:scs (descriptor-reg)) symbol value)
166 (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
167 (loadw value bsp-tn (- binding-value-slot binding-size))
168 (#+gengc storew-and-remember-slot #-gengc storew
169 value symbol symbol-value-slot other-pointer-type)
170 (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
171 (inst subq bsp-tn (* 2 word-bytes) bsp-tn)))
174 (define-vop (unbind-to-here)
175 (:args (arg :scs (descriptor-reg any-reg) :target where))
176 (:temporary (:scs (any-reg) :from (:argument 0)) where)
177 (:temporary (:scs (descriptor-reg)) symbol value)
178 (:temporary (:scs (non-descriptor-reg)) temp)
180 (let ((loop (gen-label))
184 (inst cmpeq where bsp-tn temp)
188 (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
189 (loadw value bsp-tn (- binding-value-slot binding-size))
190 (inst beq symbol skip)
191 (#+gengc storew-and-remember-slot #-gengc storew
192 value symbol symbol-value-slot other-pointer-type)
193 (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
196 (inst subq bsp-tn (* 2 word-bytes) bsp-tn)
197 (inst cmpeq where bsp-tn temp)
202 ;;;; closure indexing
204 (define-full-reffer closure-index-ref *
205 closure-info-offset function-pointer-type
206 (descriptor-reg any-reg) * %closure-index-ref)
208 (define-full-setter set-funcallable-instance-info *
209 funcallable-instance-info-offset function-pointer-type
210 (descriptor-reg any-reg null zero) * %set-funcallable-instance-info)
212 (define-full-reffer funcallable-instance-info *
213 funcallable-instance-info-offset function-pointer-type
214 (descriptor-reg any-reg) * %funcallable-instance-info)
216 (define-vop (funcallable-instance-lexenv cell-ref)
217 (:variant funcallable-instance-lexenv-slot function-pointer-type))
219 (define-vop (closure-ref slot-ref)
220 (:variant closure-info-offset function-pointer-type))
222 (define-vop (closure-init slot-set)
223 (:variant closure-info-offset function-pointer-type))
225 ;;;; value cell hackery
227 (define-vop (value-cell-ref cell-ref)
228 (:variant value-cell-value-slot other-pointer-type))
230 (define-vop (value-cell-set cell-set)
231 (:variant value-cell-value-slot other-pointer-type))
233 ;;;; instance hackery
235 (define-vop (instance-length)
237 (:translate %instance-length)
238 (:args (struct :scs (descriptor-reg)))
239 (:results (res :scs (unsigned-reg)))
240 (:result-types positive-fixnum)
242 (loadw res struct 0 instance-pointer-type)
243 (inst srl res type-bits res)))
245 (define-vop (instance-ref slot-ref)
246 (:variant instance-slots-offset instance-pointer-type)
248 (:translate %instance-ref)
249 (:arg-types instance (:constant index)))
251 (define-vop (instance-set slot-set)
253 (:translate %instance-set)
254 (:variant instance-slots-offset instance-pointer-type)
255 (:arg-types instance (:constant index) *))
257 (define-full-reffer instance-index-ref * instance-slots-offset
258 instance-pointer-type (descriptor-reg any-reg) * %instance-ref)
260 (define-full-setter instance-index-set * instance-slots-offset
261 instance-pointer-type (descriptor-reg any-reg null zero) * %instance-set)
263 ;;;; code object frobbing
265 (define-full-reffer code-header-ref * 0 other-pointer-type
266 (descriptor-reg any-reg) * code-header-ref)
268 (define-full-setter code-header-set * 0 other-pointer-type
269 (descriptor-reg any-reg null zero) * code-header-set)
271 ;;;; mutator accessing
276 (eval-when (:compile-toplevel :load-toplevel :execute)
277 ;; SBCL has never had GENGC. Now that we have Alpha support, it
278 ;; would probably be nice to restore GENGC support so that the Alpha
279 ;; doesn't have to crawl along with stop'n'copy. When we do, the CMU
280 ;; CL code below will need updating to the SBCL way of looking at
281 ;; things, e.g. at least using "SB-KERNEL" or "SB!KERNEL" instead of
282 ;; :KERNEL. -- WHN 2001-05-08
283 (error "This code is stale as of sbcl-0.6.12."))
285 (define-vop (mutator-ub32-ref)
288 (:results (res :scs (unsigned-reg)))
289 (:result-types unsigned-num)
292 (loadw res mutator-tn slot)))
294 (define-vop (mutator-descriptor-ref mutator-ub32-ref)
295 (:results (res :scs (any-reg descriptor-reg)))
298 (define-vop (mutator-sap-ref mutator-ub32-ref)
299 (:results (res :scs (sap-reg)))
300 (:result-types system-area-pointer))
303 (define-vop (mutator-ub32-set)
305 (:args (arg :scs (unsigned-reg) :target res))
306 (:arg-types unsigned-num)
307 (:results (res :scs (unsigned-reg)))
308 (:result-types unsigned-num)
311 (storew arg mutator-tn slot)
314 (define-vop (mutator-descriptor-set mutator-ub32-set)
315 (:args (arg :scs (any-reg descriptor-reg null zero) :target res))
317 (:results (res :scs (any-reg descriptor-reg)))
320 (define-vop (mutator-sap-set mutator-ub32-set)
321 (:args (arg :scs (sap-reg) :target res))
322 (:arg-types system-area-pointer)
323 (:results (res :scs (sap-reg)))
324 (:result-types system-area-pointer))
327 (macrolet ((define-mutator-accessors (slot type writable)
328 (let ((ref (symbolicate "MUTATOR-" slot "-REF"))
329 (set (and writable (symbolicate "MUTATOR-" slot "-SET")))
330 (offset (symbolicate "MUTATOR-" slot "-SLOT"))
332 (let ((*package* (find-package :kernel)))
333 (symbolicate "MUTATOR-" slot))))
335 (lisp-type ref-vop set-vop)
339 'mutator-descriptor-ref
340 'mutator-descriptor-set))
342 (values '(unsigned-byte 32)
346 (values 'system-area-pointer
350 (export ',fn :kernel)
351 (defknown ,fn () ,lisp-type (flushable))
352 (define-vop (,ref ,ref-vop)
356 `((defknown ((setf ,fn)) (,lisp-type) ,lisp-type
358 (define-vop (,set ,set-vop)
359 (:translate (setf ,fn))
360 (:variant ,offset)))))))))
361 (define-mutator-accessors thread :des t)
362 (define-mutator-accessors suspends-disabled-count :ub32 t)
363 (define-mutator-accessors suspend-pending :ub32 t)
364 (define-mutator-accessors control-stack-base :sap nil)
365 (define-mutator-accessors control-stack-end :sap nil)
366 (define-mutator-accessors current-unwind-protect :sap nil)
367 (define-mutator-accessors current-catch-block :sap nil)
368 (define-mutator-accessors binding-stack-base :sap nil)
369 (define-mutator-accessors binding-stack-end :sap nil)
370 (define-mutator-accessors number-stack-base :sap nil)
371 (define-mutator-accessors number-stack-end :sap nil)
372 (define-mutator-accessors eval-stack :des t)
373 (define-mutator-accessors eval-stack-top :ub32 t)
374 (define-mutator-accessors nursery-start :sap nil)
375 (define-mutator-accessors nursery-end :sap nil)
376 (define-mutator-accessors storebuf-start :sap nil)
377 (define-mutator-accessors storebuf-end :sap nil)
378 (define-mutator-accessors words-consed :ub32 nil))