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
80 (if (atom spec) (list spec) spec)
81 (slots (make-slot slot-name docs rest-p offset
82 (remove-keywords options
83 '(:docs :rest-p :length))))
84 (let ((offset-sym (symbolicate name "-" slot-name
85 (if rest-p "-OFFSET" "-SLOT"))))
86 (constants `(def!constant ,offset-sym ,offset
87 ,@(when docs (list docs))))
91 (forms `(defknown ,ref-trans (,type) ,slot-type ,ref-known)))
92 (forms `(def-reffer ,ref-trans ,offset ,lowtag)))
95 (forms `(defknown ,set-trans
96 ,(if (listp set-trans)
98 (list type slot-type))
101 (forms `(def-setter ,set-trans ,offset ,lowtag)))
103 (inits (cons init offset)))
105 (setf variable-length-p t))
106 (incf offset length)))
107 (unless variable-length-p
108 (let ((size (symbolicate name "-SIZE")))
109 (constants `(def!constant ,size ,offset))
112 (forms `(def-alloc ,alloc-trans ,offset ,variable-length-p ,widetag
115 (eval-when (:compile-toplevel :load-toplevel :execute)
116 (%define-primitive-object
117 ',(make-primitive-object :name name
122 :variable-length-p variable-length-p))
126 ;;;; stuff for defining reffers and setters
130 (defmacro def-reffer (name offset lowtag)
131 `(%def-reffer ',name ,offset ,lowtag))
132 (defmacro def-setter (name offset lowtag)
133 `(%def-setter ',name ,offset ,lowtag))
134 (defmacro def-alloc (name words variable-length-p header lowtag inits)
135 `(%def-alloc ',name ,words ,variable-length-p ,header ,lowtag ,inits))
136 ;;; KLUDGE: The %DEF-FOO functions used to implement the macros here
137 ;;; are defined later in another file, since they use structure slot
138 ;;; setters defined later, and we can't have physical forward
139 ;;; references to structure slot setters because ANSI in its wisdom
140 ;;; allows the xc host CL to implement structure slot setters as SETF
141 ;;; expanders instead of SETF functions. -- WHN 2002-02-09
143 ;;;; some general constant definitions
145 ;;; FIXME: SC-NUMBER-LIMIT should probably be exported from SB!C
146 ;;; or SB!VM so that we don't need to do this extra IN-PACKAGE.
149 ;;; the maximum number of SCs in any implementation
150 (def!constant sc-number-limit 32)
152 ;;; Modular functions
154 ;;; For a documentation, see CUT-TO-WIDTH.
156 (defstruct modular-class
157 ;; hash: name -> { :GOOD | optimizer | ({modular-fun-info}*)}
158 (funs (make-hash-table :test 'eq))
159 ;; hash: modular-variant -> (prototype width)
161 ;; FIXME: Reimplement with generic function names of kind
162 ;; (MODULAR-VERSION prototype width)
163 (versions (make-hash-table :test 'eq))
164 ;; list of increasing widths
166 (defvar *unsigned-modular-class* (make-modular-class))
167 (defvar *signed-modular-class* (make-modular-class))
168 (defun find-modular-class (kind)
170 (:unsigned *unsigned-modular-class*)
171 (:signed *signed-modular-class*)))
173 (defstruct modular-fun-info
174 (name (missing-arg) :type symbol)
175 (width (missing-arg) :type (integer 0))
176 (lambda-list (missing-arg) :type list)
177 (prototype (missing-arg) :type symbol))
179 (defun find-modular-version (fun-name class width)
180 (let ((infos (gethash fun-name (modular-class-funs (find-modular-class class)))))
182 (find-if (lambda (item-width) (>= item-width width))
184 :key #'modular-fun-info-width)
187 ;;; Return (VALUES prototype-name width)
188 (defun modular-version-info (name class)
189 (values-list (gethash name (modular-class-versions (find-modular-class class)))))
191 (defun %define-modular-fun (name lambda-list prototype class width)
192 (let* ((class (find-modular-class class))
193 (funs (modular-class-funs class))
194 (versions (modular-class-versions class))
195 (infos (the list (gethash prototype funs)))
196 (info (find-if (lambda (item-width) (= item-width width))
198 :key #'modular-fun-info-width)))
200 (unless (and (eq name (modular-fun-info-name info))
201 (= (length lambda-list)
202 (length (modular-fun-info-lambda-list info))))
203 (setf (modular-fun-info-name info) name)
204 (style-warn "Redefining modular version ~S of ~S for width ~S."
205 name prototype width))
206 (setf (gethash prototype funs)
208 (list (make-modular-fun-info :name name
210 :lambda-list lambda-list
211 :prototype prototype))
213 #'< :key #'modular-fun-info-width)
214 (gethash name versions)
215 (list prototype width)))
216 (setf (modular-class-widths class)
217 (merge 'list (list width) (modular-class-widths class) #'<))))
219 (defmacro define-modular-fun (name lambda-list prototype class width)
220 (check-type name symbol)
221 (check-type prototype symbol)
222 (check-type class (member :unsigned :signed))
223 (check-type width unsigned-byte)
224 (dolist (arg lambda-list)
225 (when (member arg lambda-list-keywords)
226 (error "Lambda list keyword ~S is not supported for ~
227 modular function lambda lists." arg)))
229 (%define-modular-fun ',name ',lambda-list ',prototype ',class ,width)
230 (defknown ,name ,(mapcar (constantly 'integer) lambda-list)
232 (:unsigned 'unsigned-byte)
233 (:signed 'signed-byte))
235 (foldable flushable movable)
236 :derive-type (make-modular-fun-type-deriver
237 ',prototype ',class ,width))))
239 (defun %define-good-modular-fun (name class)
240 (setf (gethash name (modular-class-funs (find-modular-class class))) :good)
243 (defmacro define-good-modular-fun (name class)
244 (check-type name symbol)
245 (check-type class (member :unsigned :signed))
246 `(%define-good-modular-fun ',name ',class))
248 (defmacro define-modular-fun-optimizer
249 (name ((&rest lambda-list) class &key (width (gensym "WIDTH")))
251 (check-type name symbol)
252 (check-type class (member :unsigned :signed))
253 (dolist (arg lambda-list)
254 (when (member arg lambda-list-keywords)
255 (error "Lambda list keyword ~S is not supported for ~
256 modular function lambda lists." arg)))
257 (with-unique-names (call args)
258 `(setf (gethash ',name (modular-class-funs (find-modular-class ',class)))
259 (lambda (,call ,width)
260 (declare (type basic-combination ,call)
261 (type (integer 0) width))
262 (let ((,args (basic-combination-args ,call)))
263 (when (= (length ,args) ,(length lambda-list))
264 (destructuring-bind ,lambda-list ,args
265 (declare (type lvar ,@lambda-list))