1 ;;;; the HPPA VM definition of SAP operations
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 ;;;; Moves and coercions:
16 ;;; Move a tagged SAP to an untagged representation.
17 (define-vop (move-to-sap)
18 (:args (x :scs (any-reg descriptor-reg)))
19 (:results (y :scs (sap-reg)))
20 (:note "system area pointer indirection")
22 (loadw y x sap-pointer-slot other-pointer-lowtag)))
24 (define-move-vop move-to-sap :move
25 (descriptor-reg) (sap-reg))
27 ;;; Move an untagged SAP to a tagged representation.
28 (define-vop (move-from-sap)
29 (:args (sap :scs (sap-reg) :to :save))
30 (:temporary (:scs (non-descriptor-reg)) ndescr)
31 (:results (res :scs (descriptor-reg)))
32 (:note "system area pointer allocation")
34 (with-fixed-allocation (res nil ndescr sap-widetag sap-size nil)
35 (storew sap res sap-pointer-slot other-pointer-lowtag))))
37 (define-move-vop move-from-sap :move
38 (sap-reg) (descriptor-reg))
40 ;;; Move untagged sap values.
41 (define-vop (sap-move)
44 :load-if (not (location= x y))))
45 (:results (y :scs (sap-reg)
46 :load-if (not (location= x y))))
53 (define-move-vop sap-move :move
56 ;;; Move untagged sap args/return-values.
57 (define-vop (move-sap-arg)
61 :load-if (not (sc-is y sap-reg))))
63 (:note "SAP argument move")
69 (storew x fp (tn-offset y))))))
71 (define-move-vop move-sap-arg :move-arg
72 (descriptor-reg sap-reg) (sap-reg))
74 ;;; Use standard MOVE-ARG + coercion to move an untagged sap to a
75 ;;; descriptor passing location.
76 (define-move-vop move-arg :move-arg
77 (sap-reg) (descriptor-reg))
79 ;;;; SAP-INT and INT-SAP
81 (:args (sap :scs (sap-reg) :target int))
82 (:arg-types system-area-pointer)
83 (:results (int :scs (unsigned-reg)))
84 (:result-types unsigned-num)
91 (:args (int :scs (unsigned-reg) :target sap))
92 (:arg-types unsigned-num)
93 (:results (sap :scs (sap-reg)))
94 (:result-types system-area-pointer)
100 ;;;; POINTER+ and POINTER-
101 (define-vop (pointer+)
103 (:args (ptr :scs (sap-reg))
104 (offset :scs (signed-reg immediate)))
105 (:arg-types system-area-pointer signed-num)
106 (:results (res :scs (sap-reg)))
107 (:result-types system-area-pointer)
112 (inst add ptr offset res))
115 ((and (< (tn-value offset) (ash 1 10))
116 (> (tn-value offset) (- (ash 1 10))))
117 (inst addi (tn-value offset) ptr res))
119 (inst li (tn-value offset) res)
120 (inst add ptr res res)))))))
122 (define-vop (pointer-)
124 (:args (ptr1 :scs (sap-reg))
125 (ptr2 :scs (sap-reg)))
126 (:arg-types system-area-pointer system-area-pointer)
128 (:results (res :scs (signed-reg)))
129 (:result-types signed-num)
131 (inst sub ptr1 ptr2 res)))
133 ;;;; mumble-SYSTEM-REF and mumble-SYSTEM-SET
134 (macrolet ((def-system-ref-and-set
135 (ref-name set-name sc type size &optional signed)
136 (let ((ref-name-c (symbolicate ref-name "-C"))
137 (set-name-c (symbolicate set-name "-C")))
139 (define-vop (,ref-name)
140 (:translate ,ref-name)
142 (:args (object :scs (sap-reg))
143 (offset :scs (signed-reg)))
144 (:arg-types system-area-pointer signed-num)
145 (:results (result :scs (,sc)))
146 (:result-types ,type)
153 offset object result)
154 ,@(when (and signed (not (eq size :long)))
155 `((inst extrs result 31 ,(ecase size
159 (define-vop (,ref-name-c)
160 (:translate ,ref-name)
162 (:args (object :scs (sap-reg)))
163 (:arg-types system-area-pointer
164 (:constant ,(if (eq size :float)
168 (:results (result :scs (,sc)))
169 (:result-types ,type)
176 offset object result)
177 ,@(when (and signed (not (eq size :long)))
178 `((inst extrs result 31 ,(ecase size
182 (define-vop (,set-name)
183 (:translate ,set-name)
185 (:args (object :scs (sap-reg)
186 ,@(unless (eq size :float) '(:target sap)))
187 (offset :scs (signed-reg))
188 (value :scs (,sc) :target result))
189 (:arg-types system-area-pointer signed-num ,type)
190 (:results (result :scs (,sc)))
191 (:result-types ,type)
192 ,@(unless (eq size :float)
193 '((:temporary (:scs (sap-reg) :from (:argument 0)) sap)))
195 ,@(if (eq size :float)
196 `((inst fstx value offset object)
197 (unless (location= value result)
198 (inst funop :copy value result)))
199 `((inst add object offset sap)
200 (inst ,(ecase size (:byte 'stb) (:short 'sth) (:long 'stw))
202 (move value result)))))
203 (define-vop (,set-name-c)
204 (:translate ,set-name)
206 (:args (object :scs (sap-reg))
207 (value :scs (,sc) :target result))
208 (:arg-types system-area-pointer
209 (:constant ,(if (eq size :float)
214 (:results (result :scs (,sc)))
215 (:result-types ,type)
217 ,@(if (eq size :float)
218 `((inst fsts value offset object)
219 (unless (location= value result)
220 (inst funop :copy value result)))
221 `((inst ,(ecase size (:byte 'stb) (:short 'sth) (:long 'stw))
223 (move value result)))))))))
224 (def-system-ref-and-set sap-ref-8 %set-sap-ref-8
225 unsigned-reg positive-fixnum :byte nil)
226 (def-system-ref-and-set signed-sap-ref-8 %set-signed-sap-ref-8
227 signed-reg tagged-num :byte t)
228 (def-system-ref-and-set sap-ref-16 %set-sap-ref-16
229 unsigned-reg positive-fixnum :short nil)
230 (def-system-ref-and-set signed-sap-ref-16 %set-signed-sap-ref-16
231 signed-reg tagged-num :short t)
232 (def-system-ref-and-set sap-ref-32 %set-sap-ref-32
233 unsigned-reg unsigned-num :long nil)
234 (def-system-ref-and-set signed-sap-ref-32 %set-signed-sap-ref-32
235 signed-reg signed-num :long t)
236 (def-system-ref-and-set sap-ref-sap %set-sap-ref-sap
237 sap-reg system-area-pointer :long)
238 (def-system-ref-and-set sap-ref-single %set-sap-ref-single
239 single-reg single-float :float)
240 (def-system-ref-and-set sap-ref-double %set-sap-ref-double
241 double-reg double-float :float))
243 ;;; Noise to convert normal lisp data objects into SAPs.
244 (define-vop (vector-sap)
245 (:translate vector-sap)
247 (:args (vector :scs (descriptor-reg)))
248 (:results (sap :scs (sap-reg)))
249 (:result-types system-area-pointer)
251 (inst addi (- (* vector-data-offset n-word-bytes) other-pointer-lowtag)
254 ;;; Transforms for 64-bit SAP accessors.
256 (deftransform sap-ref-64 ((sap offset) (* *))
257 '(logior (ash (sap-ref-32 sap offset) 32)
258 (sap-ref-32 sap (+ offset 4))))
260 (deftransform signed-sap-ref-64 ((sap offset) (* *))
261 '(logior (ash (signed-sap-ref-32 sap offset) 32)
262 (sap-ref-32 sap (+ 4 offset))))
264 (deftransform %set-sap-ref-64 ((sap offset value) (* * *))
266 (%set-sap-ref-32 sap offset (ash value -32))
267 (%set-sap-ref-32 sap (+ offset 4) (logand value #xffffffff))))
269 (deftransform %set-signed-sap-ref-64 ((sap offset value) (* * *))
271 (%set-signed-sap-ref-32 sap offset (ash value -32))
272 (%set-sap-ref-32 sap (+ 4 offset) (logand value #xffffffff))))