1 ;;; -*- Package: ALPHA; Log: C.Log -*-
3 ;;; **********************************************************************
4 ;;; This code was written as part of the CMU Common Lisp project at
5 ;;; Carnegie Mellon University, and has been placed in the public domain.
9 ;;; **********************************************************************
11 ;;; This file contains the VM definition of various primitive memory access
12 ;;; VOPs for the Alpha.
14 ;;; Written by Rob MacLachlan
16 ;;; Converted by Sean Hallgren
23 ;;;; Data object ref/set stuff.
26 (:args (object :scs (descriptor-reg)))
27 (:info name offset lowtag)
29 (:results (result :scs (descriptor-reg any-reg)))
31 (loadw result object offset lowtag)))
33 (define-vop (set-slot)
34 (:args (object :scs (descriptor-reg))
35 (value :scs (descriptor-reg any-reg null zero)))
36 (:info name offset lowtag #+gengc remember)
42 (storew-and-remember-slot value object offset lowtag)
43 (storew value object offset lowtag))
45 (storew value object offset lowtag)))
48 ;;;; Symbol hacking VOPs:
50 ;;; The compiler likes to be able to directly SET symbols.
52 (define-vop (set cell-set)
53 (:variant symbol-value-slot other-pointer-type))
55 ;;; Do a cell ref with an error check for being unbound.
57 (define-vop (checked-cell-ref)
58 (:args (object :scs (descriptor-reg) :target obj-temp))
59 (:results (value :scs (descriptor-reg any-reg)))
62 (:save-p :compute-only)
63 (:temporary (:scs (non-descriptor-reg)) temp)
64 (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
66 ;;; With Symbol-Value, we check that the value isn't the trap object. So
67 ;;; Symbol-Value of NIL is NIL.
69 (define-vop (symbol-value checked-cell-ref)
70 (:translate symbol-value)
72 (move object obj-temp)
73 (loadw value obj-temp symbol-value-slot other-pointer-type)
74 (let ((err-lab (generate-error-code vop unbound-symbol-error obj-temp)))
75 (inst xor value unbound-marker-type temp)
76 (inst beq temp err-lab))))
78 ;;; Like CHECKED-CELL-REF, only we are a predicate to see if the cell is bound.
79 (define-vop (boundp-frob)
80 (:args (object :scs (descriptor-reg)))
84 (:temporary (:scs (descriptor-reg)) value)
85 (:temporary (:scs (non-descriptor-reg)) temp))
87 (define-vop (boundp boundp-frob)
90 (loadw value object symbol-value-slot other-pointer-type)
91 (inst xor value unbound-marker-type temp)
93 (inst beq temp target)
94 (inst bne temp target))))
96 (define-vop (fast-symbol-value cell-ref)
97 (:variant symbol-value-slot other-pointer-type)
99 (:translate symbol-value))
103 ;;;; Fdefinition (fdefn) objects.
105 (define-vop (fdefn-function cell-ref)
106 (:variant fdefn-function-slot other-pointer-type))
108 (define-vop (safe-fdefn-function)
109 (:args (object :scs (descriptor-reg) :target obj-temp))
110 (:results (value :scs (descriptor-reg any-reg)))
112 (:save-p :compute-only)
113 (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
114 (:temporary (:scs (non-descriptor-reg)) temp)
116 (move object obj-temp)
117 (loadw value obj-temp fdefn-function-slot other-pointer-type)
118 (let ((err-lab (generate-error-code vop undefined-symbol-error obj-temp)))
119 (inst cmpeq value null-tn temp)
120 (inst bne temp err-lab))))
122 (define-vop (set-fdefn-function)
124 (:translate (setf fdefn-function))
125 (:args (function :scs (descriptor-reg) :target result)
126 (fdefn :scs (descriptor-reg)))
127 (:temporary (:scs (interior-reg)) lip)
128 (:temporary (:scs (non-descriptor-reg)) type)
129 (:results (result :scs (descriptor-reg)))
131 (let ((normal-fn (gen-label)))
132 (load-type type function (- function-pointer-type))
133 (inst xor type function-header-type type)
135 (- (ash function-code-offset word-shift) function-pointer-type)
137 (inst beq type normal-fn)
138 (inst li (make-fixup "closure_tramp" :foreign) lip)
139 (emit-label normal-fn)
140 (storew lip fdefn fdefn-raw-addr-slot other-pointer-type)
141 (storew function fdefn fdefn-function-slot other-pointer-type)
142 (move function result))))
145 (define-vop (fdefn-makunbound)
147 (:translate fdefn-makunbound)
148 (:args (fdefn :scs (descriptor-reg) :target result))
149 (:temporary (:scs (non-descriptor-reg)) temp)
150 (:results (result :scs (descriptor-reg)))
152 (storew null-tn fdefn fdefn-function-slot other-pointer-type)
153 (inst li (make-fixup "undefined_tramp" :foreign) temp)
155 (storew temp fdefn fdefn-raw-addr-slot other-pointer-type)))
159 ;;;; Binding and Unbinding.
161 ;;; BIND -- Establish VAL as a binding for SYMBOL. Save the old value and
162 ;;; the symbol on the binding stack and stuff the new value into the
166 (:args (val :scs (any-reg descriptor-reg))
167 (symbol :scs (descriptor-reg)))
168 (:temporary (:scs (descriptor-reg)) temp)
170 (loadw temp symbol symbol-value-slot other-pointer-type)
171 (inst addq bsp-tn (* 2 word-bytes) bsp-tn)
172 (storew temp bsp-tn (- binding-value-slot binding-size))
173 (storew symbol bsp-tn (- binding-symbol-slot binding-size))
174 (#+gengc storew-and-remember-slot #-gengc storew
175 val symbol symbol-value-slot other-pointer-type)))
179 (:temporary (:scs (descriptor-reg)) symbol value)
181 (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
182 (loadw value bsp-tn (- binding-value-slot binding-size))
183 (#+gengc storew-and-remember-slot #-gengc storew
184 value symbol symbol-value-slot other-pointer-type)
185 (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
186 (inst subq bsp-tn (* 2 word-bytes) bsp-tn)))
189 (define-vop (unbind-to-here)
190 (:args (arg :scs (descriptor-reg any-reg) :target where))
191 (:temporary (:scs (any-reg) :from (:argument 0)) where)
192 (:temporary (:scs (descriptor-reg)) symbol value)
193 (:temporary (:scs (non-descriptor-reg)) temp)
195 (let ((loop (gen-label))
199 (inst cmpeq where bsp-tn temp)
203 (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
204 (loadw value bsp-tn (- binding-value-slot binding-size))
205 (inst beq symbol skip)
206 (#+gengc storew-and-remember-slot #-gengc storew
207 value symbol symbol-value-slot other-pointer-type)
208 (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
211 (inst subq bsp-tn (* 2 word-bytes) bsp-tn)
212 (inst cmpeq where bsp-tn temp)
219 ;;;; Closure indexing.
221 (define-full-reffer closure-index-ref *
222 closure-info-offset function-pointer-type
223 (descriptor-reg any-reg) * %closure-index-ref)
225 (define-full-setter set-funcallable-instance-info *
226 funcallable-instance-info-offset function-pointer-type
227 (descriptor-reg any-reg null zero) * %set-funcallable-instance-info)
229 (define-full-reffer funcallable-instance-info *
230 funcallable-instance-info-offset function-pointer-type
231 (descriptor-reg any-reg) * %funcallable-instance-info)
233 (define-vop (funcallable-instance-lexenv cell-ref)
234 (:variant funcallable-instance-lexenv-slot function-pointer-type))
236 (define-vop (closure-ref slot-ref)
237 (:variant closure-info-offset function-pointer-type))
239 (define-vop (closure-init slot-set)
240 (:variant closure-info-offset function-pointer-type))
243 ;;;; Value Cell hackery.
245 (define-vop (value-cell-ref cell-ref)
246 (:variant value-cell-value-slot other-pointer-type))
248 (define-vop (value-cell-set cell-set)
249 (:variant value-cell-value-slot other-pointer-type))
253 ;;;; Instance hackery:
255 (define-vop (instance-length)
257 (:translate %instance-length)
258 (:args (struct :scs (descriptor-reg)))
259 (:results (res :scs (unsigned-reg)))
260 (:result-types positive-fixnum)
262 (loadw res struct 0 instance-pointer-type)
263 (inst srl res type-bits res)))
265 (define-vop (instance-ref slot-ref)
266 (:variant instance-slots-offset instance-pointer-type)
268 (:translate %instance-ref)
269 (:arg-types instance (:constant index)))
271 (define-vop (instance-set slot-set)
273 (:translate %instance-set)
274 (:variant instance-slots-offset instance-pointer-type)
275 (:arg-types instance (:constant index) *))
277 (define-full-reffer instance-index-ref * instance-slots-offset
278 instance-pointer-type (descriptor-reg any-reg) * %instance-ref)
280 (define-full-setter instance-index-set * instance-slots-offset
281 instance-pointer-type (descriptor-reg any-reg null zero) * %instance-set)
285 ;;;; Code object frobbing.
287 (define-full-reffer code-header-ref * 0 other-pointer-type
288 (descriptor-reg any-reg) * code-header-ref)
290 (define-full-setter code-header-set * 0 other-pointer-type
291 (descriptor-reg any-reg null zero) * code-header-set)
295 ;;;; Mutator accessing.
299 (define-vop (mutator-ub32-ref)
302 (:results (res :scs (unsigned-reg)))
303 (:result-types unsigned-num)
306 (loadw res mutator-tn slot)))
308 (define-vop (mutator-descriptor-ref mutator-ub32-ref)
309 (:results (res :scs (any-reg descriptor-reg)))
312 (define-vop (mutator-sap-ref mutator-ub32-ref)
313 (:results (res :scs (sap-reg)))
314 (:result-types system-area-pointer))
317 (define-vop (mutator-ub32-set)
319 (:args (arg :scs (unsigned-reg) :target res))
320 (:arg-types unsigned-num)
321 (:results (res :scs (unsigned-reg)))
322 (:result-types unsigned-num)
325 (storew arg mutator-tn slot)
328 (define-vop (mutator-descriptor-set mutator-ub32-set)
329 (:args (arg :scs (any-reg descriptor-reg null zero) :target res))
331 (:results (res :scs (any-reg descriptor-reg)))
334 (define-vop (mutator-sap-set mutator-ub32-set)
335 (:args (arg :scs (sap-reg) :target res))
336 (:arg-types system-area-pointer)
337 (:results (res :scs (sap-reg)))
338 (:result-types system-area-pointer))
341 (macrolet ((define-mutator-accessors (slot type writable)
342 (let ((ref (symbolicate "MUTATOR-" slot "-REF"))
343 (set (and writable (symbolicate "MUTATOR-" slot "-SET")))
344 (offset (symbolicate "MUTATOR-" slot "-SLOT"))
346 (let ((*package* (find-package :kernel)))
347 (symbolicate "MUTATOR-" slot))))
349 (lisp-type ref-vop set-vop)
352 (values t 'mutator-descriptor-ref 'mutator-descriptor-set))
354 (values '(unsigned-byte 32) 'mutator-ub32-ref 'mutator-ub32-set))
356 (values 'system-area-pointer 'mutator-sap-ref 'mutator-sap-set)))
358 (export ',fn :kernel)
359 (defknown ,fn () ,lisp-type (flushable))
360 (define-vop (,ref ,ref-vop)
364 `((defknown ((setf ,fn)) (,lisp-type) ,lisp-type (unsafe))
365 (define-vop (,set ,set-vop)
366 (:translate (setf ,fn))
367 (:variant ,offset)))))))))
368 (define-mutator-accessors thread :des t)
369 (define-mutator-accessors suspends-disabled-count :ub32 t)
370 (define-mutator-accessors suspend-pending :ub32 t)
371 (define-mutator-accessors control-stack-base :sap nil)
372 (define-mutator-accessors control-stack-end :sap nil)
373 (define-mutator-accessors current-unwind-protect :sap nil)
374 (define-mutator-accessors current-catch-block :sap nil)
375 (define-mutator-accessors binding-stack-base :sap nil)
376 (define-mutator-accessors binding-stack-end :sap nil)
377 (define-mutator-accessors number-stack-base :sap nil)
378 (define-mutator-accessors number-stack-end :sap nil)
379 (define-mutator-accessors eval-stack :des t)
380 (define-mutator-accessors eval-stack-top :ub32 t)
381 (define-mutator-accessors nursery-start :sap nil)
382 (define-mutator-accessors nursery-end :sap nil)
383 (define-mutator-accessors storebuf-start :sap nil)
384 (define-mutator-accessors storebuf-end :sap nil)
385 (define-mutator-accessors words-consed :ub32 nil))