1 ;;;; miscellaneous VM definition noise for the PPC
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 ;;; NUMBER-STACK-DISPLACEMENT
16 ;;; The number of bytes reserved above the number stack pointer. These
17 ;;; slots are required by architecture, mostly (?) to make C backtrace
18 ;;; work. This must be a power of 2 - see BYTES-REQUIRED-FOR-NUMBER-STACK.
20 (def!constant number-stack-displacement
25 ;;;; Define the registers
27 (eval-when (:compile-toplevel :load-toplevel :execute)
28 (defvar *register-names* (make-array 32 :initial-element nil)))
30 (macrolet ((defreg (name offset)
31 (let ((offset-sym (symbolicate name "-OFFSET")))
32 `(eval-when (:compile-toplevel :load-toplevel :execute)
33 (def!constant ,offset-sym ,offset)
34 (setf (svref *register-names* ,offset-sym) ,(symbol-name name)))))
36 (defregset (name &rest regs)
37 `(eval-when (:compile-toplevel :load-toplevel :execute)
39 (list ,@(mapcar #'(lambda (name)
40 (symbolicate name "-OFFSET")) regs))))))
44 (defreg rtoc 2) ; May be "NULL" someday.
52 (defreg fdefn 10) ; was nl7
54 ;; FIXME: some kind of comment here would be nice.
56 ;; FIXME II: this also reveals the need to autogenerate lispregs.h
57 #!+darwin (defreg cfunc 12)
58 #!-darwin (defreg nfp 12)
59 #!+darwin (defreg nfp 13)
60 #!-darwin (defreg cfunc 13)
80 (defregset non-descriptor-regs
81 nl0 nl1 nl2 nl3 nl4 nl5 nl6 #+nil nl7 cfunc nargs nfp)
83 (defregset descriptor-regs
84 fdefn a0 a1 a2 a3 ocfp lra cname lexenv l0 l1 l2 )
87 (defregset *register-arg-offsets* a0 a1 a2 a3)
88 (defparameter register-arg-names '(a0 a1 a2 a3)))
92 ;;;; SB and SC definition:
94 (define-storage-base registers :finite :size 32)
95 (define-storage-base float-registers :finite :size 32)
96 (define-storage-base control-stack :unbounded :size 8)
97 (define-storage-base non-descriptor-stack :unbounded :size 0)
98 (define-storage-base constant :non-packed)
99 (define-storage-base immediate-constant :non-packed)
102 ;;; Handy macro so we don't have to keep changing all the numbers whenever
103 ;;; we insert a new storage class.
105 (defmacro define-storage-classes (&rest classes)
106 (do ((forms (list 'progn)
107 (let* ((class (car classes))
108 (sc-name (car class))
109 (constant-name (intern (concatenate 'simple-string
112 (list* `(define-storage-class ,sc-name ,index
114 `(def!constant ,constant-name ,index)
117 (classes classes (cdr classes)))
121 (def!constant kludge-nondeterministic-catch-block-size 7)
123 (define-storage-classes
125 ;; Non-immediate contstants in the constant pool
128 ;; ZERO and NULL are in registers.
129 (zero immediate-constant)
130 (null immediate-constant)
132 ;; Anything else that can be an immediate.
133 (immediate immediate-constant)
138 ;; The control stack. (Scanned by GC)
139 (control-stack control-stack)
141 ;; The non-descriptor stacks.
142 (signed-stack non-descriptor-stack) ; (signed-byte 32)
143 (unsigned-stack non-descriptor-stack) ; (unsigned-byte 32)
144 (character-stack non-descriptor-stack) ; non-descriptor characters.
145 (sap-stack non-descriptor-stack) ; System area pointers.
146 (single-stack non-descriptor-stack) ; single-floats
147 (double-stack non-descriptor-stack
148 :element-size 2 :alignment 2) ; double floats.
149 (complex-single-stack non-descriptor-stack :element-size 2)
150 (complex-double-stack non-descriptor-stack :element-size 4 :alignment 2)
153 ;; **** Things that can go in the integer registers.
155 ;; Immediate descriptor objects. Don't have to be seen by GC, but nothing
156 ;; bad will happen if they are. (fixnums, characters, header values, etc).
159 :locations #.(append non-descriptor-regs descriptor-regs)
160 :constant-scs (zero immediate)
162 :alternate-scs (control-stack))
164 ;; Pointer descriptor objects. Must be seen by GC.
165 (descriptor-reg registers
166 :locations #.descriptor-regs
167 :constant-scs (constant null immediate)
169 :alternate-scs (control-stack))
171 ;; Non-Descriptor characters
172 (character-reg registers
173 :locations #.non-descriptor-regs
174 :constant-scs (immediate)
176 :alternate-scs (character-stack))
178 ;; Non-Descriptor SAP's (arbitrary pointers into address space)
180 :locations #.non-descriptor-regs
181 :constant-scs (immediate)
183 :alternate-scs (sap-stack))
185 ;; Non-Descriptor (signed or unsigned) numbers.
186 (signed-reg registers
187 :locations #.non-descriptor-regs
188 :constant-scs (zero immediate)
190 :alternate-scs (signed-stack))
191 (unsigned-reg registers
192 :locations #.non-descriptor-regs
193 :constant-scs (zero immediate)
195 :alternate-scs (unsigned-stack))
197 ;; Random objects that must not be seen by GC. Used only as temporaries.
198 (non-descriptor-reg registers
199 :locations #.non-descriptor-regs)
201 ;; Pointers to the interior of objects. Used only as a temporary.
202 (interior-reg registers
203 :locations (#.lip-offset))
206 ;; **** Things that can go in the floating point registers.
208 ;; Non-Descriptor single-floats.
209 (single-reg float-registers
210 :locations #.(loop for i from 0 to 31 collect i)
211 ;; ### Note: We really should have every location listed, but then we
212 ;; would have to make load-tns work with element-sizes other than 1.
215 :alternate-scs (single-stack))
217 ;; Non-Descriptor double-floats.
218 (double-reg float-registers
219 :locations #.(loop for i from 0 to 31 collect i)
220 ;; ### Note: load-tns don't work with an element-size other than 1.
221 ;; :element-size 2 :alignment 2
224 :alternate-scs (double-stack))
226 (complex-single-reg float-registers
227 :locations #.(loop for i from 0 to 30 by 2 collect i)
231 :alternate-scs (complex-single-stack))
233 (complex-double-reg float-registers
234 :locations #.(loop for i from 0 to 30 by 2 collect i)
238 :alternate-scs (complex-double-stack))
240 ;; A catch or unwind block.
241 (catch-block control-stack
242 :element-size kludge-nondeterministic-catch-block-size))
244 ;;;; Make some random tns for important registers.
246 (macrolet ((defregtn (name sc)
247 (let ((offset-sym (symbolicate name "-OFFSET"))
248 (tn-sym (symbolicate name "-TN")))
249 `(defparameter ,tn-sym
250 (make-random-tn :kind :normal
251 :sc (sc-or-lose ',sc)
252 :offset ,offset-sym)))))
254 (defregtn zero any-reg)
255 (defregtn lip interior-reg)
256 (defregtn null descriptor-reg)
257 (defregtn code descriptor-reg)
258 (defregtn alloc any-reg)
260 (defregtn nargs any-reg)
261 (defregtn bsp any-reg)
262 (defregtn csp any-reg)
263 (defregtn cfp any-reg)
264 (defregtn ocfp any-reg)
265 (defregtn nsp any-reg))
267 ;;; If VALUE can be represented as an immediate constant, then return the
268 ;;; appropriate SC number, otherwise return NIL.
269 (!def-vm-support-routine immediate-constant-sc (value)
272 (sc-number-or-lose 'zero))
274 (sc-number-or-lose 'null))
275 ((or (integer #.sb!xc:most-negative-fixnum #.sb!xc:most-positive-fixnum)
276 system-area-pointer character)
277 (sc-number-or-lose 'immediate))
279 (if (static-symbol-p value)
280 (sc-number-or-lose 'immediate)
283 ;;;; function call parameters
285 ;;; the SC numbers for register and stack arguments/return values
286 (def!constant register-arg-scn (meta-sc-number-or-lose 'descriptor-reg))
287 (def!constant immediate-arg-scn (meta-sc-number-or-lose 'any-reg))
288 (def!constant control-stack-arg-scn (meta-sc-number-or-lose 'control-stack))
290 (eval-when (:compile-toplevel :load-toplevel :execute)
292 ;;; offsets of special stack frame locations
293 (def!constant ocfp-save-offset 0)
294 (def!constant lra-save-offset 1)
295 (def!constant nfp-save-offset 2)
297 ;;; the number of arguments/return values passed in registers
298 (def!constant register-arg-count 4)
300 ;;; names to use for the argument registers
306 ;;; A list of TN's describing the register arguments.
308 (defparameter *register-arg-tns*
309 (mapcar #'(lambda (n)
310 (make-random-tn :kind :normal
311 :sc (sc-or-lose 'descriptor-reg)
313 *register-arg-offsets*))
315 (export 'single-value-return-byte-offset)
317 ;;; This is used by the debugger.
318 (def!constant single-value-return-byte-offset 8)
320 ;;; This function is called by debug output routines that want a pretty name
321 ;;; for a TN's location. It returns a thing that can be printed with PRINC.
322 (!def-vm-support-routine location-print-name (tn)
323 (declare (type tn tn))
324 (let ((sb (sb-name (sc-sb (tn-sc tn))))
325 (offset (tn-offset tn)))
327 (registers (or (svref *register-names* offset)
328 (format nil "R~D" offset)))
329 (float-registers (format nil "F~D" offset))
330 (control-stack (format nil "CS~D" offset))
331 (non-descriptor-stack (format nil "NS~D" offset))
332 (constant (format nil "Const~D" offset))
333 (immediate-constant "Immed"))))