1 ;;;; some macros and constants that are object-format-specific or are
2 ;;;; used for defining the object format
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
15 ;;;; other miscellaneous stuff
17 ;;; This returns a form that returns a dual-word aligned number of bytes when
18 ;;; given a number of words.
20 ;;; FIXME: should be a function
21 ;;; FIXME: should be called PAD-DATA-BLOCK-SIZE
22 (defmacro pad-data-block (words)
23 `(logandc2 (+ (ash ,words word-shift) lowtag-mask) lowtag-mask))
25 ;;;; primitive object definition stuff
27 (defun remove-keywords (options keywords)
28 (cond ((null options) nil)
29 ((member (car options) keywords)
30 (remove-keywords (cddr options) keywords))
32 (list* (car options) (cadr options)
33 (remove-keywords (cddr options) keywords)))))
35 (def!struct (prim-object-slot
36 (:constructor make-slot (name docs rest-p offset options))
37 (:make-load-form-fun just-dump-it-normally)
39 (name nil :type symbol)
40 (docs nil :type (or null simple-string))
41 (rest-p nil :type (member t nil))
42 (offset 0 :type fixnum)
43 (options nil :type list))
45 (def!struct (primitive-object (:make-load-form-fun just-dump-it-normally))
46 (name nil :type symbol)
47 (widetag nil :type symbol)
48 (lowtag nil :type symbol)
49 (options nil :type list)
50 (slots nil :type list)
52 (variable-length-p nil :type (member t nil)))
54 (defvar *primitive-objects* nil)
56 (defun %define-primitive-object (primobj)
57 (let ((name (primitive-object-name primobj)))
58 (setf *primitive-objects*
60 (remove name *primitive-objects*
61 :key #'primitive-object-name :test #'eq)))
64 (defmacro define-primitive-object
65 ((name &key lowtag widetag alloc-trans (type t))
67 (collect ((slots) (exports) (constants) (forms) (inits))
68 (let ((offset (if widetag 1 0))
69 (variable-length-p nil))
70 (dolist (spec slot-specs)
71 (when variable-length-p
72 (error "No more slots can follow a :rest-p slot."))
74 (slot-name &rest options
75 &key docs rest-p (length (if rest-p 0 1))
76 ((:type slot-type) t) init
77 (ref-known nil ref-known-p) ref-trans
78 (set-known nil set-known-p) set-trans
81 (if (atom spec) (list spec) spec)
82 (slots (make-slot slot-name docs rest-p offset
83 (remove-keywords options
84 '(:docs :rest-p :length))))
85 (let ((offset-sym (symbolicate name "-" slot-name
86 (if rest-p "-OFFSET" "-SLOT"))))
87 (constants `(def!constant ,offset-sym ,offset
88 ,@(when docs (list docs))))
92 (forms `(defknown ,ref-trans (,type) ,slot-type ,ref-known)))
93 (forms `(def-reffer ,ref-trans ,offset ,lowtag)))
96 (forms `(defknown ,set-trans
97 ,(if (listp set-trans)
99 (list type slot-type))
102 (forms `(def-setter ,set-trans ,offset ,lowtag)))
105 (error ":REST-P and :CAS-TRANS incompatible."))
108 (defknown ,cas-trans (,type ,slot-type ,slot-type)
110 #!+compare-and-swap-vops
111 (def-casser ,cas-trans ,offset ,lowtag))))
113 (inits (cons init offset)))
115 (setf variable-length-p t))
116 (incf offset length)))
117 (unless variable-length-p
118 (let ((size (symbolicate name "-SIZE")))
119 (constants `(def!constant ,size ,offset))
122 (forms `(def-alloc ,alloc-trans ,offset
123 ,(if variable-length-p :var-alloc :fixed-alloc)
127 (eval-when (:compile-toplevel :load-toplevel :execute)
128 (%define-primitive-object
129 ',(make-primitive-object :name name
134 :variable-length-p variable-length-p))
138 ;;;; stuff for defining reffers and setters
142 (defmacro def-reffer (name offset lowtag)
143 `(%def-reffer ',name ,offset ,lowtag))
144 (defmacro def-setter (name offset lowtag)
145 `(%def-setter ',name ,offset ,lowtag))
146 (defmacro def-alloc (name words alloc-style header lowtag inits)
147 `(%def-alloc ',name ,words ,alloc-style ,header ,lowtag ,inits))
148 #!+compare-and-swap-vops
149 (defmacro def-casser (name offset lowtag)
150 `(%def-casser ',name ,offset ,lowtag))
151 ;;; KLUDGE: The %DEF-FOO functions used to implement the macros here
152 ;;; are defined later in another file, since they use structure slot
153 ;;; setters defined later, and we can't have physical forward
154 ;;; references to structure slot setters because ANSI in its wisdom
155 ;;; allows the xc host CL to implement structure slot setters as SETF
156 ;;; expanders instead of SETF functions. -- WHN 2002-02-09
158 ;;;; some general constant definitions
160 ;;; FIXME: SC-NUMBER-LIMIT should probably be exported from SB!C
161 ;;; or SB!VM so that we don't need to do this extra IN-PACKAGE.
164 ;;; the maximum number of SCs in any implementation
165 (def!constant sc-number-limit 40)
167 ;;; Modular functions
169 ;;; For a documentation, see CUT-TO-WIDTH.
171 (defstruct modular-class
172 ;; hash: name -> { :GOOD | optimizer | ({modular-fun-info}*)}
173 (funs (make-hash-table :test 'eq))
174 ;; hash: modular-variant -> (prototype width)
176 ;; FIXME: Reimplement with generic function names of kind
177 ;; (MODULAR-VERSION prototype width)
178 (versions (make-hash-table :test 'eq))
179 ;; list of increasing widths + signedps
181 (defvar *untagged-unsigned-modular-class* (make-modular-class))
182 (defvar *untagged-signed-modular-class* (make-modular-class))
183 (defvar *tagged-modular-class* (make-modular-class))
184 (defun find-modular-class (kind signedp)
188 ((nil) *untagged-unsigned-modular-class*)
189 ((t) *untagged-signed-modular-class*)))
192 *tagged-modular-class*)))
194 (defstruct modular-fun-info
195 (name (missing-arg) :type symbol)
196 (width (missing-arg) :type (integer 0))
197 (signedp (missing-arg) :type boolean)
198 (lambda-list (missing-arg) :type list)
199 (prototype (missing-arg) :type symbol))
201 (defun find-modular-version (fun-name kind signedp width)
202 (let ((infos (gethash fun-name (modular-class-funs (find-modular-class kind signedp)))))
204 (find-if (lambda (mfi)
205 (aver (eq (modular-fun-info-signedp mfi) signedp))
206 (>= (modular-fun-info-width mfi) width))
210 ;;; Return (VALUES prototype-name width)
211 (defun modular-version-info (name kind signedp)
212 (values-list (gethash name (modular-class-versions (find-modular-class kind signedp)))))
214 (defun %define-modular-fun (name lambda-list prototype kind signedp width)
215 (let* ((class (find-modular-class kind signedp))
216 (funs (modular-class-funs class))
217 (versions (modular-class-versions class))
218 (infos (the list (gethash prototype funs)))
219 (info (find-if (lambda (mfi)
220 (and (eq (modular-fun-info-signedp mfi) signedp)
221 (= (modular-fun-info-width mfi) width)))
224 (unless (and (eq name (modular-fun-info-name info))
225 (= (length lambda-list)
226 (length (modular-fun-info-lambda-list info))))
227 (setf (modular-fun-info-name info) name)
228 (style-warn "Redefining modular version ~S of ~S for ~
229 ~:[un~;~]signed width ~S."
230 name prototype signedp width))
231 (setf (gethash prototype funs)
233 (list (make-modular-fun-info :name name
236 :lambda-list lambda-list
237 :prototype prototype))
239 #'< :key #'modular-fun-info-width)
240 (gethash name versions)
241 (list prototype width)))
242 (setf (modular-class-widths class)
243 (merge 'list (list (cons width signedp)) (modular-class-widths class)
246 (defmacro define-modular-fun (name lambda-list prototype kind signedp width)
247 (check-type name symbol)
248 (check-type prototype symbol)
249 (check-type kind (member :untagged :tagged))
250 (check-type width unsigned-byte)
251 (dolist (arg lambda-list)
252 (when (member arg sb!xc:lambda-list-keywords)
253 (error "Lambda list keyword ~S is not supported for ~
254 modular function lambda lists." arg)))
256 (%define-modular-fun ',name ',lambda-list ',prototype ',kind ',signedp ,width)
257 (defknown ,name ,(mapcar (constantly 'integer) lambda-list)
259 ((nil) 'unsigned-byte)
262 (foldable flushable movable)
263 :derive-type (make-modular-fun-type-deriver
264 ',prototype ',kind ,width ',signedp))))
266 (defun %define-good-modular-fun (name kind signedp)
267 (setf (gethash name (modular-class-funs (find-modular-class kind signedp))) :good)
270 (defmacro define-good-modular-fun (name kind signedp)
271 (check-type name symbol)
272 (check-type kind (member :untagged :tagged))
273 `(%define-good-modular-fun ',name ',kind ',signedp))
275 (defmacro define-modular-fun-optimizer
276 (name ((&rest lambda-list) kind signedp &key (width (gensym "WIDTH")))
278 (check-type name symbol)
279 (check-type kind (member :untagged :tagged))
280 (dolist (arg lambda-list)
281 (when (member arg sb!xc:lambda-list-keywords)
282 (error "Lambda list keyword ~S is not supported for ~
283 modular function lambda lists." arg)))
284 (with-unique-names (call args)
285 `(setf (gethash ',name (modular-class-funs (find-modular-class ',kind ',signedp)))
286 (lambda (,call ,width)
287 (declare (type basic-combination ,call)
288 (type (integer 0) ,width))
289 (let ((,args (basic-combination-args ,call)))
290 (when (= (length ,args) ,(length lambda-list))
291 (destructuring-bind ,lambda-list ,args
292 (declare (type lvar ,@lambda-list))