1 ;;;; SAP operations for the x86 VM
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 (descriptor-reg)))
19 (:results (y :scs (sap-reg)))
20 (:note "pointer to SAP coercion")
22 (loadw y x sap-pointer-slot other-pointer-type)))
23 (define-move-vop move-to-sap :move
24 (descriptor-reg) (sap-reg))
26 ;;; Move an untagged SAP to a tagged representation.
27 (define-vop (move-from-sap)
28 (:args (sap :scs (sap-reg) :to :result))
29 (:results (res :scs (descriptor-reg) :from :argument))
30 (:note "SAP to pointer coercion")
33 (with-fixed-allocation (res sap-type sap-size node)
34 (storew sap res sap-pointer-slot other-pointer-type))))
35 (define-move-vop move-from-sap :move
36 (sap-reg) (descriptor-reg))
38 ;;; Move untagged sap values.
39 (define-vop (sap-move)
42 :load-if (not (location= x y))))
43 (:results (y :scs (sap-reg)
44 :load-if (not (location= x y))))
50 (define-move-vop sap-move :move
53 ;;; Move untagged sap arguments/return-values.
54 (define-vop (move-sap-argument)
58 :load-if (not (sc-is y sap-reg))))
60 (:note "SAP argument move")
66 (if (= (tn-offset fp) esp-offset)
67 (storew x fp (tn-offset y)) ; c-call
68 (storew x fp (- (1+ (tn-offset y)))))))))
69 (define-move-vop move-sap-argument :move-argument
70 (descriptor-reg sap-reg) (sap-reg))
72 ;;; Use standard MOVE-ARGUMENT + coercion to move an untagged sap to a
73 ;;; descriptor passing location.
74 (define-move-vop move-argument :move-argument
75 (sap-reg) (descriptor-reg))
77 ;;;; SAP-INT and INT-SAP
80 (:args (sap :scs (sap-reg) :target int))
81 (:arg-types system-area-pointer)
82 (:results (int :scs (unsigned-reg)))
83 (:result-types unsigned-num)
90 (:args (int :scs (unsigned-reg) :target sap))
91 (:arg-types unsigned-num)
92 (:results (sap :scs (sap-reg)))
93 (:result-types system-area-pointer)
99 ;;;; POINTER+ and POINTER-
101 (define-vop (pointer+)
103 (:args (ptr :scs (sap-reg) :target res
104 :load-if (not (location= ptr res)))
105 (offset :scs (signed-reg immediate)))
106 (:arg-types system-area-pointer signed-num)
107 (:results (res :scs (sap-reg) :from (:argument 0)
108 :load-if (not (location= ptr res))))
109 (:result-types system-area-pointer)
112 (cond ((and (sc-is ptr sap-reg) (sc-is res sap-reg)
113 (not (location= ptr res)))
116 (inst lea res (make-ea :dword :base ptr :index offset :scale 1)))
118 (inst lea res (make-ea :dword :base ptr
119 :disp (tn-value offset))))))
124 (inst add res offset))
126 (inst add res (tn-value offset))))))))
128 (define-vop (pointer-)
130 (:args (ptr1 :scs (sap-reg) :target res)
131 (ptr2 :scs (sap-reg)))
132 (:arg-types system-area-pointer system-area-pointer)
134 (:results (res :scs (signed-reg) :from (:argument 0)))
135 (:result-types signed-num)
138 (inst sub res ptr2)))
140 ;;;; mumble-SYSTEM-REF and mumble-SYSTEM-SET
142 (macrolet ((def-system-ref-and-set (ref-name
148 (let ((ref-name-c (symbolicate ref-name "-C"))
149 (set-name-c (symbolicate set-name "-C"))
150 (temp-sc (symbolicate size "-REG")))
152 (define-vop (,ref-name)
153 (:translate ,ref-name)
155 (:args (sap :scs (sap-reg))
156 (offset :scs (signed-reg)))
157 (:arg-types system-area-pointer signed-num)
158 ,@(unless (eq size :dword)
159 `((:temporary (:sc ,temp-sc
163 (:results (result :scs (,sc)))
164 (:result-types ,type)
166 (inst mov ,(if (eq size :dword) 'result 'temp)
167 (make-ea ,size :base sap :index offset))
168 ,@(unless (eq size :dword)
169 `((inst ,(if signed 'movsx 'movzx)
171 (define-vop (,ref-name-c)
172 (:translate ,ref-name)
174 (:args (sap :scs (sap-reg)))
175 (:arg-types system-area-pointer
176 (:constant (signed-byte 32)))
178 ,@(unless (eq size :dword)
179 `((:temporary (:sc ,temp-sc
183 (:results (result :scs (,sc)))
184 (:result-types ,type)
186 (inst mov ,(if (eq size :dword) 'result 'temp)
187 (make-ea ,size :base sap :disp offset))
188 ,@(unless (eq size :dword)
189 `((inst ,(if signed 'movsx 'movzx)
191 (define-vop (,set-name)
192 (:translate ,set-name)
194 (:args (sap :scs (sap-reg) :to (:eval 0))
195 (offset :scs (signed-reg) :to (:eval 0))
197 :target ,(if (eq size :dword)
200 (:arg-types system-area-pointer signed-num ,type)
201 ,@(unless (eq size :dword)
202 `((:temporary (:sc ,temp-sc :offset eax-offset
203 :from (:argument 2) :to (:result 0)
206 (:results (result :scs (,sc)))
207 (:result-types ,type)
209 ,@(unless (eq size :dword)
210 `((move eax-tn value)))
211 (inst mov (make-ea ,size
214 ,(if (eq size :dword) 'value 'temp))
216 ,(if (eq size :dword) 'value 'eax-tn))))
217 (define-vop (,set-name-c)
218 (:translate ,set-name)
220 (:args (sap :scs (sap-reg) :to (:eval 0))
222 :target ,(if (eq size :dword)
225 (:arg-types system-area-pointer
226 (:constant (signed-byte 32)) ,type)
228 ,@(unless (eq size :dword)
229 `((:temporary (:sc ,temp-sc :offset eax-offset
230 :from (:argument 2) :to (:result 0)
233 (:results (result :scs (,sc)))
234 (:result-types ,type)
236 ,@(unless (eq size :dword)
237 `((move eax-tn value)))
239 (make-ea ,size :base sap :disp offset)
240 ,(if (eq size :dword) 'value 'temp))
241 (move result ,(if (eq size :dword)
245 (def-system-ref-and-set sap-ref-8 %set-sap-ref-8
246 unsigned-reg positive-fixnum :byte nil)
247 (def-system-ref-and-set signed-sap-ref-8 %set-signed-sap-ref-8
248 signed-reg tagged-num :byte t)
249 (def-system-ref-and-set sap-ref-16 %set-sap-ref-16
250 unsigned-reg positive-fixnum :word nil)
251 (def-system-ref-and-set signed-sap-ref-16 %set-signed-sap-ref-16
252 signed-reg tagged-num :word t)
253 (def-system-ref-and-set sap-ref-32 %set-sap-ref-32
254 unsigned-reg unsigned-num :dword nil)
255 (def-system-ref-and-set signed-sap-ref-32 %set-signed-sap-ref-32
256 signed-reg signed-num :dword t)
257 (def-system-ref-and-set sap-ref-sap %set-sap-ref-sap
258 sap-reg system-area-pointer :dword))
262 (define-vop (sap-ref-double)
263 (:translate sap-ref-double)
265 (:args (sap :scs (sap-reg))
266 (offset :scs (signed-reg)))
267 (:arg-types system-area-pointer signed-num)
268 (:results (result :scs (double-reg)))
269 (:result-types double-float)
271 (with-empty-tn@fp-top(result)
272 (inst fldd (make-ea :dword :base sap :index offset)))))
274 (define-vop (sap-ref-double-c)
275 (:translate sap-ref-double)
277 (:args (sap :scs (sap-reg)))
278 (:arg-types system-area-pointer (:constant (signed-byte 32)))
280 (:results (result :scs (double-reg)))
281 (:result-types double-float)
283 (with-empty-tn@fp-top(result)
284 (inst fldd (make-ea :dword :base sap :disp offset)))))
286 (define-vop (%set-sap-ref-double)
287 (:translate %set-sap-ref-double)
289 (:args (sap :scs (sap-reg) :to (:eval 0))
290 (offset :scs (signed-reg) :to (:eval 0))
291 (value :scs (double-reg)))
292 (:arg-types system-area-pointer signed-num double-float)
293 (:results (result :scs (double-reg)))
294 (:result-types double-float)
296 (cond ((zerop (tn-offset value))
298 (inst fstd (make-ea :dword :base sap :index offset))
299 (unless (zerop (tn-offset result))
300 ;; Value is in ST0 but not result.
303 ;; Value is not in ST0.
305 (inst fstd (make-ea :dword :base sap :index offset))
306 (cond ((zerop (tn-offset result))
307 ;; The result is in ST0.
310 ;; Neither value or result are in ST0.
311 (unless (location= value result)
313 (inst fxch value)))))))
315 (define-vop (%set-sap-ref-double-c)
316 (:translate %set-sap-ref-double)
318 (:args (sap :scs (sap-reg) :to (:eval 0))
319 (value :scs (double-reg)))
320 (:arg-types system-area-pointer (:constant (signed-byte 32)) double-float)
322 (:results (result :scs (double-reg)))
323 (:result-types double-float)
325 (cond ((zerop (tn-offset value))
327 (inst fstd (make-ea :dword :base sap :disp offset))
328 (unless (zerop (tn-offset result))
329 ;; Value is in ST0 but not result.
332 ;; Value is not in ST0.
334 (inst fstd (make-ea :dword :base sap :disp offset))
335 (cond ((zerop (tn-offset result))
336 ;; The result is in ST0.
339 ;; Neither value or result are in ST0.
340 (unless (location= value result)
342 (inst fxch value)))))))
346 (define-vop (sap-ref-single)
347 (:translate sap-ref-single)
349 (:args (sap :scs (sap-reg))
350 (offset :scs (signed-reg)))
351 (:arg-types system-area-pointer signed-num)
352 (:results (result :scs (single-reg)))
353 (:result-types single-float)
355 (with-empty-tn@fp-top(result)
356 (inst fld (make-ea :dword :base sap :index offset)))))
358 (define-vop (sap-ref-single-c)
359 (:translate sap-ref-single)
361 (:args (sap :scs (sap-reg)))
362 (:arg-types system-area-pointer (:constant (signed-byte 32)))
364 (:results (result :scs (single-reg)))
365 (:result-types single-float)
367 (with-empty-tn@fp-top(result)
368 (inst fld (make-ea :dword :base sap :disp offset)))))
370 (define-vop (%set-sap-ref-single)
371 (:translate %set-sap-ref-single)
373 (:args (sap :scs (sap-reg) :to (:eval 0))
374 (offset :scs (signed-reg) :to (:eval 0))
375 (value :scs (single-reg)))
376 (:arg-types system-area-pointer signed-num single-float)
377 (:results (result :scs (single-reg)))
378 (:result-types single-float)
380 (cond ((zerop (tn-offset value))
382 (inst fst (make-ea :dword :base sap :index offset))
383 (unless (zerop (tn-offset result))
384 ;; Value is in ST0 but not result.
387 ;; Value is not in ST0.
389 (inst fst (make-ea :dword :base sap :index offset))
390 (cond ((zerop (tn-offset result))
391 ;; The result is in ST0.
394 ;; Neither value or result are in ST0
395 (unless (location= value result)
397 (inst fxch value)))))))
399 (define-vop (%set-sap-ref-single-c)
400 (:translate %set-sap-ref-single)
402 (:args (sap :scs (sap-reg) :to (:eval 0))
403 (value :scs (single-reg)))
404 (:arg-types system-area-pointer (:constant (signed-byte 32)) single-float)
406 (:results (result :scs (single-reg)))
407 (:result-types single-float)
409 (cond ((zerop (tn-offset value))
411 (inst fst (make-ea :dword :base sap :disp offset))
412 (unless (zerop (tn-offset result))
413 ;; Value is in ST0 but not result.
416 ;; Value is not in ST0.
418 (inst fst (make-ea :dword :base sap :disp offset))
419 (cond ((zerop (tn-offset result))
420 ;; The result is in ST0.
423 ;; Neither value or result are in ST0
424 (unless (location= value result)
426 (inst fxch value)))))))
430 (define-vop (sap-ref-long)
431 (:translate sap-ref-long)
433 (:args (sap :scs (sap-reg))
434 (offset :scs (signed-reg)))
435 (:arg-types system-area-pointer signed-num)
436 (:results (result :scs (#!+long-float long-reg #!-long-float double-reg)))
437 (:result-types #!+long-float long-float #!-long-float double-float)
439 (with-empty-tn@fp-top(result)
440 (inst fldl (make-ea :dword :base sap :index offset)))))
442 (define-vop (sap-ref-long-c)
443 (:translate sap-ref-long)
445 (:args (sap :scs (sap-reg)))
446 (:arg-types system-area-pointer (:constant (signed-byte 32)))
448 (:results (result :scs (#!+long-float long-reg #!-long-float double-reg)))
449 (:result-types #!+long-float long-float #!-long-float double-float)
451 (with-empty-tn@fp-top(result)
452 (inst fldl (make-ea :dword :base sap :disp offset)))))
455 (define-vop (%set-sap-ref-long)
456 (:translate %set-sap-ref-long)
458 (:args (sap :scs (sap-reg) :to (:eval 0))
459 (offset :scs (signed-reg) :to (:eval 0))
460 (value :scs (long-reg)))
461 (:arg-types system-area-pointer signed-num long-float)
462 (:results (result :scs (long-reg)))
463 (:result-types long-float)
465 (cond ((zerop (tn-offset value))
467 (store-long-float (make-ea :dword :base sap :index offset))
468 (unless (zerop (tn-offset result))
469 ;; Value is in ST0 but not result.
472 ;; Value is not in ST0.
474 (store-long-float (make-ea :dword :base sap :index offset))
475 (cond ((zerop (tn-offset result))
476 ;; The result is in ST0.
479 ;; Neither value or result are in ST0
480 (unless (location= value result)
482 (inst fxch value)))))))
484 ;;; noise to convert normal lisp data objects into SAPs
486 (define-vop (vector-sap)
487 (:translate vector-sap)
489 (:args (vector :scs (descriptor-reg) :target sap))
490 (:results (sap :scs (sap-reg)))
491 (:result-types system-area-pointer)
494 (inst add sap (- (* vector-data-offset word-bytes) other-pointer-type))))