1 ;;;; various useful macros for generating HPPA code
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 ;;; Instruction-like macros.
16 (defmacro move (src dst)
17 "Move SRC into DST unless they are location=."
18 (once-only ((src src) (dst dst))
19 `(unless (location= ,src ,dst)
20 (inst move ,src ,dst))))
22 (defmacro loadw (result base &optional (offset 0) (lowtag 0))
23 (once-only ((result result) (base base))
24 `(inst ldw (- (ash ,offset word-shift) ,lowtag) ,base ,result)))
26 (defmacro storew (value base &optional (offset 0) (lowtag 0))
27 (once-only ((value value) (base base) (offset offset) (lowtag lowtag))
28 `(inst stw ,value (- (ash ,offset word-shift) ,lowtag) ,base)))
30 (defmacro load-symbol (reg symbol)
31 (once-only ((reg reg) (symbol symbol))
32 `(inst addi (static-symbol-offset ,symbol) null-tn ,reg)))
34 (defmacro load-symbol-value (reg symbol)
36 (+ (static-symbol-offset ',symbol)
37 (ash symbol-value-slot word-shift)
38 (- other-pointer-lowtag))
42 (defmacro store-symbol-value (reg symbol)
43 `(inst stw ,reg (+ (static-symbol-offset ',symbol)
44 (ash symbol-value-slot word-shift)
45 (- other-pointer-lowtag))
48 (defmacro load-type (target source &optional (offset 0))
49 "Loads the type bits of a pointer into target independent of
50 byte-ordering issues."
51 (ecase *backend-byte-order*
53 `(inst ldb ,offset ,source ,target))
55 `(inst ldb (+ ,offset (1- n-word-bytes)) ,source ,target))))
57 ;;; Macros to handle the fact that we cannot use the machine native call and
58 ;;; return instructions.
60 (defmacro lisp-jump (function)
61 "Jump to the lisp function FUNCTION. LIP is an interior-reg temporary."
64 (- (ash simple-fun-code-offset word-shift) fun-pointer-lowtag)
68 (move ,function code-tn)))
70 (defmacro lisp-return (return-pc &key (offset 0) (frob-code t))
71 "Return to RETURN-PC."
73 (inst addi (- (* (1+ ,offset) n-word-bytes) other-pointer-lowtag)
75 (inst bv lip-tn ,@(unless frob-code '(:nullify t)))
77 `((move ,return-pc code-tn)))))
79 (defmacro emit-return-pc (label)
80 "Emit a return-pc header word. LABEL is the label to use for this
85 (inst lra-header-word)))
90 ;;; Move a stack TN to a register and vice-versa.
91 (defmacro load-stack-tn (reg stack)
94 (let ((offset (tn-offset stack)))
97 (loadw reg cfp-tn offset))))))
98 (defmacro store-stack-tn (stack reg)
101 (let ((offset (tn-offset stack)))
104 (storew reg cfp-tn offset))))))
106 (defmacro maybe-load-stack-tn (reg reg-or-stack)
107 "Move the TN Reg-Or-Stack into Reg if it isn't already there."
108 (once-only ((n-reg reg)
109 (n-stack reg-or-stack))
111 ((any-reg descriptor-reg)
113 ((any-reg descriptor-reg)
114 (move ,n-stack ,n-reg))
116 (loadw ,n-reg cfp-tn (tn-offset ,n-stack))))))))
119 ;;;; Storage allocation:
121 (defmacro with-fixed-allocation ((result-tn temp-tn type-code size)
123 "Do stuff to allocate an other-pointer object of fixed Size with a single
124 word header having the specified Type-Code. The result is placed in
125 Result-TN, and Temp-TN is a non-descriptor temp (which may be randomly used
126 by the body.) The body is placed inside the PSEUDO-ATOMIC, and presumably
127 initializes the object."
129 (bug "empty &body in WITH-FIXED-ALLOCATION"))
130 (once-only ((result-tn result-tn) (temp-tn temp-tn)
131 (type-code type-code) (size size))
132 `(pseudo-atomic (:extra (pad-data-block ,size))
133 (inst move alloc-tn ,result-tn)
134 (inst dep other-pointer-lowtag 31 3 ,result-tn)
135 (inst li (logior (ash (1- ,size) n-widetag-bits) ,type-code) ,temp-tn)
136 (storew ,temp-tn ,result-tn 0 other-pointer-lowtag)
141 (eval-when (compile load eval)
142 (defun emit-error-break (vop kind code values)
143 (let ((vector (gensym)))
146 (note-this-location vop :internal-error)))
148 (with-adjustable-vector (,vector)
149 (write-var-integer (error-number-or-lose ',code) ,vector)
150 ,@(mapcar #'(lambda (tn)
152 (write-var-integer (make-sc-offset (sc-number
157 (inst byte (length ,vector))
158 (dotimes (i (length ,vector))
159 (inst byte (aref ,vector i))))
160 (align word-shift)))))
162 (defmacro error-call (vop error-code &rest values)
163 "Cause an error. ERROR-CODE is the error to cause."
165 (emit-error-break vop error-trap error-code values)))
168 (defmacro cerror-call (vop label error-code &rest values)
169 "Cause a continuable error. If the error is continued, execution resumes at
173 ,@(emit-error-break vop cerror-trap error-code values)))
175 (defmacro generate-error-code (vop error-code &rest values)
176 "Generate-Error-Code Error-code Value*
177 Emit code for an error with the specified Error-Code and context Values."
178 `(assemble (*elsewhere*)
179 (let ((start-lab (gen-label)))
180 (emit-label start-lab)
181 (error-call ,vop ,error-code ,@values)
184 (defmacro generate-cerror-code (vop error-code &rest values)
185 "Generate-CError-Code Error-code Value*
186 Emit code for a continuable error with the specified Error-Code and
187 context Values. If the error is continued, execution resumes after
188 the GENERATE-CERROR-CODE form."
189 (with-unique-names (continue error)
190 `(let ((,continue (gen-label)))
191 (emit-label ,continue)
192 (assemble (*elsewhere*)
193 (let ((,error (gen-label)))
195 (cerror-call ,vop ,continue ,error-code ,@values)
200 ;;; handy macro for making sequences look atomic
201 (defmacro pseudo-atomic ((&key (extra 0)) &rest forms)
202 (let ((n-extra (gensym)))
203 `(let ((,n-extra ,extra))
204 (inst addi 4 alloc-tn alloc-tn)
206 (inst addit (- ,n-extra 4) alloc-tn alloc-tn :od))))
208 ;;;; indexed references
210 (deftype load/store-index (scale lowtag min-offset
211 &optional (max-offset min-offset))
212 `(integer ,(- (truncate (+ (ash 1 14)
213 (* min-offset n-word-bytes)
216 ,(truncate (- (+ (1- (ash 1 14)) lowtag)
217 (* max-offset n-word-bytes))
220 (defmacro define-full-reffer (name type offset lowtag scs el-type
225 `((:translate ,translate)))
227 (:args (object :scs (descriptor-reg) :to (:eval 0))
228 (index :scs (any-reg) :target temp))
229 (:arg-types ,type tagged-num)
230 (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) temp)
231 (:results (value :scs ,scs))
232 (:result-types ,el-type)
234 (inst addi (- (* ,offset n-word-bytes) ,lowtag) index temp)
235 (inst ldwx temp object value)))
236 (define-vop (,(symbolicate name "-C"))
238 `((:translate ,translate)))
240 (:args (object :scs (descriptor-reg)))
243 (:constant (load/store-index ,n-word-bytes ,(eval lowtag)
245 (:results (value :scs ,scs))
246 (:result-types ,el-type)
248 (inst ldw (- (* (+ ,offset index) n-word-bytes) ,lowtag)
251 (defmacro define-full-setter (name type offset lowtag scs el-type
256 `((:translate ,translate)))
258 (:args (object :scs (descriptor-reg))
259 (index :scs (any-reg))
260 (value :scs ,scs :target result))
261 (:arg-types ,type tagged-num ,el-type)
262 (:temporary (:scs (interior-reg)) lip)
263 (:results (result :scs ,scs))
264 (:result-types ,el-type)
266 (inst add object index lip)
267 (inst stw value (- (* ,offset n-word-bytes) ,lowtag) lip)
268 (move value result)))
269 (define-vop (,(symbolicate name "-C"))
271 `((:translate ,translate)))
273 (:args (object :scs (descriptor-reg))
277 (:constant (load/store-index ,n-word-bytes ,(eval lowtag)
280 (:results (result :scs ,scs))
281 (:result-types ,el-type)
283 (inst stw value (- (* (+ ,offset index) n-word-bytes) ,lowtag) object)
284 (move value result)))))
287 (defmacro define-partial-reffer (name type size signed offset lowtag scs
288 el-type &optional translate)
289 (let ((scale (ecase size (:byte 1) (:short 2))))
293 `((:translate ,translate)))
295 (:args (object :scs (descriptor-reg) :to (:eval 0))
296 (index :scs (unsigned-reg)))
297 (:arg-types ,type positive-fixnum)
298 (:results (value :scs ,scs))
299 (:result-types ,el-type)
300 (:temporary (:scs (interior-reg)) lip)
302 (inst ,(ecase size (:byte 'add) (:short 'sh1add))
304 (inst ,(ecase size (:byte 'ldb) (:short 'ldh))
305 (- (* ,offset n-word-bytes) ,lowtag) lip value)
307 `((inst extrs value 31 ,(* scale n-byte-bits) value)))))
308 (define-vop (,(symbolicate name "-C"))
310 `((:translate ,translate)))
312 (:args (object :scs (descriptor-reg)))
315 (:constant (load/store-index ,scale
318 (:results (value :scs ,scs))
319 (:result-types ,el-type)
321 (inst ,(ecase size (:byte 'ldb) (:short 'ldh))
322 (- (+ (* ,offset n-word-bytes) (* index ,scale)) ,lowtag)
325 `((inst extrs value 31 ,(* scale n-byte-bits) value))))))))
327 (defmacro define-partial-setter (name type size offset lowtag scs el-type
329 (let ((scale (ecase size (:byte 1) (:short 2))))
333 `((:translate ,translate)))
335 (:args (object :scs (descriptor-reg))
336 (index :scs (unsigned-reg))
337 (value :scs ,scs :target result))
338 (:arg-types ,type positive-fixnum ,el-type)
339 (:temporary (:scs (interior-reg)) lip)
340 (:results (result :scs ,scs))
341 (:result-types ,el-type)
343 (inst ,(ecase size (:byte 'add) (:short 'sh1add))
345 (inst ,(ecase size (:byte 'stb) (:short 'sth))
346 value (- (* ,offset n-word-bytes) ,lowtag) lip)
347 (move value result)))
348 (define-vop (,(symbolicate name "-C"))
350 `((:translate ,translate)))
352 (:args (object :scs (descriptor-reg))
353 (value :scs ,scs :target result))
356 (:constant (load/store-index ,scale
360 (:results (result :scs ,scs))
361 (:result-types ,el-type)
363 (inst ,(ecase size (:byte 'stb) (:short 'sth))
365 (- (+ (* ,offset n-word-bytes) (* index ,scale)) ,lowtag)
367 (move value result))))))
370 (def!macro with-pinned-objects ((&rest objects) &body body)
371 "Arrange with the garbage collector that the pages occupied by
372 OBJECTS will not be moved in memory for the duration of BODY.
373 Useful for e.g. foreign calls where another thread may trigger
374 garbage collection. This is currently implemented by disabling GC"
375 (declare (ignore objects)) ;should we eval these for side-effect?