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-lispobj %set-sap-ref-lispobj
239 descriptor-reg
* :long
)
240 (def-system-ref-and-set sap-ref-single %set-sap-ref-single
241 single-reg single-float
:float
)
242 (def-system-ref-and-set sap-ref-double %set-sap-ref-double
243 double-reg double-float
:float
))
245 ;;; Noise to convert normal lisp data objects into SAPs.
246 (define-vop (vector-sap)
247 (:translate vector-sap
)
249 (:args
(vector :scs
(descriptor-reg)))
250 (:results
(sap :scs
(sap-reg)))
251 (:result-types system-area-pointer
)
253 (inst addi
(- (* vector-data-offset n-word-bytes
) other-pointer-lowtag
)