1 ;;;; miscellaneous VM definition noise for HPPA
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.
15 ;;;; Define the registers
17 (eval-when (:compile-toplevel :load-toplevel :execute)
18 (defvar *register-names* (make-array 32 :initial-element nil)))
20 ;;; FIXME: These want to turn into macrolets.
21 (macrolet ((defreg (name offset)
22 (let ((offset-sym (symbolicate name "-OFFSET")))
23 `(eval-when (:compile-toplevel :load-toplevel :execute)
24 (def!constant ,offset-sym ,offset)
25 (setf (svref *register-names* ,offset-sym) ,(symbol-name name)))))
26 (defregset (name &rest regs)
27 `(eval-when (:compile-toplevel :load-toplevel :execute)
29 (list ,@(mapcar #'(lambda (name) (symbolicate name "-OFFSET")) regs))))))
33 ;; This gets trashed by the C call convention.
36 ;; These are the callee saves, so these registers are stay live over
54 ;; This is where the caller-saves registers start, but we don't
55 ;; really care because we need to clear the above after call-out to
56 ;; make sure no pointers into oldspace are kept around.
61 ;; These are the 4 C argument registers.
66 ;; The global Data Pointer. We just leave it alone, because we
69 ;; These two are use for C return values.
75 (defregset non-descriptor-regs
76 nl0 nl1 nl2 nl3 nl4 nl5 nfp cfunc)
78 (defregset descriptor-regs
79 fdefn lexenv nargs ocfp lra a0 a1 a2 a3 a4 a5 l0 l1 l2)
81 (defregset *register-arg-offsets*
85 (define-storage-base registers :finite :size 32)
86 (define-storage-base float-registers :finite :size 64)
87 (define-storage-base control-stack :unbounded :size 8)
88 (define-storage-base non-descriptor-stack :unbounded :size 0)
89 (define-storage-base constant :non-packed)
90 (define-storage-base immediate-constant :non-packed)
93 ;;; Handy macro so we don't have to keep changing all the numbers whenever
94 ;;; we insert a new storage class.
96 (defmacro !define-storage-classes (&rest classes)
97 (do ((forms (list 'progn)
98 (let* ((class (car classes))
100 (constant-name (intern (concatenate 'simple-string
103 (list* `(define-storage-class ,sc-name ,index
105 `(defconstant ,constant-name ,index)
106 `(export ',constant-name)
109 (classes classes (cdr classes)))
113 (def!constant kludge-nondeterministic-catch-block-size 7)
115 (!define-storage-classes
117 ;; Non-immediate contstants in the constant pool
120 ;; ZERO and NULL are in registers.
121 (zero immediate-constant)
122 (null immediate-constant)
123 (fp-single-zero immediate-constant)
124 (fp-double-zero immediate-constant)
126 ;; Anything else that can be an immediate.
127 (immediate immediate-constant)
132 ;; The control stack. (Scanned by GC)
133 (control-stack control-stack)
135 ;; The non-descriptor stacks.
136 (signed-stack non-descriptor-stack) ; (signed-byte 32)
137 (unsigned-stack non-descriptor-stack) ; (unsigned-byte 32)
138 (base-char-stack non-descriptor-stack) ; non-descriptor characters.
139 (sap-stack non-descriptor-stack) ; System area pointers.
140 (single-stack non-descriptor-stack) ; single-floats
141 (double-stack non-descriptor-stack
142 :element-size 2 :alignment 2) ; double floats.
143 (complex-single-stack non-descriptor-stack :element-size 2)
144 (complex-double-stack non-descriptor-stack :element-size 4 :alignment 2)
147 ;; **** Things that can go in the integer registers.
149 ;; Immediate descriptor objects. Don't have to be seen by GC, but nothing
150 ;; bad will happen if they are. (fixnums, characters, header values, etc).
153 :locations #.(append non-descriptor-regs descriptor-regs)
154 :constant-scs (zero immediate)
156 :alternate-scs (control-stack))
158 ;; Pointer descriptor objects. Must be seen by GC.
159 (descriptor-reg registers
160 :locations #.descriptor-regs
161 :constant-scs (constant null immediate)
163 :alternate-scs (control-stack))
165 ;; Non-Descriptor characters
166 (base-char-reg registers
167 :locations #.non-descriptor-regs
168 :constant-scs (immediate)
170 :alternate-scs (base-char-stack))
172 ;; Non-Descriptor SAP's (arbitrary pointers into address space)
174 :locations #.non-descriptor-regs
175 :constant-scs (immediate)
177 :alternate-scs (sap-stack))
179 ;; Non-Descriptor (signed or unsigned) numbers.
180 (signed-reg registers
181 :locations #.non-descriptor-regs
182 :constant-scs (zero immediate)
184 :alternate-scs (signed-stack))
185 (unsigned-reg registers
186 :locations #.non-descriptor-regs
187 :constant-scs (zero immediate)
189 :alternate-scs (unsigned-stack))
191 ;; Random objects that must not be seen by GC. Used only as temporaries.
192 (non-descriptor-reg registers
193 :locations #.non-descriptor-regs)
195 ;; Pointers to the interior of objects. Used only as an temporary.
196 (interior-reg registers
197 :locations (#.lip-offset))
200 ;; **** Things that can go in the floating point registers.
202 ;; Non-Descriptor single-floats.
203 (single-reg float-registers
204 :locations #.(loop for i from 4 to 31 collect i)
205 :constant-scs (fp-single-zero)
207 :alternate-scs (single-stack))
209 ;; Non-Descriptor double-floats.
210 (double-reg float-registers
211 :locations #.(loop for i from 4 to 31 collect i)
212 :constant-scs (fp-double-zero)
214 :alternate-scs (double-stack))
216 (complex-single-reg float-registers
217 :locations #.(loop for i from 4 to 30 by 2 collect i)
221 :alternate-scs (complex-single-stack))
223 (complex-double-reg float-registers
224 :locations #.(loop for i from 4 to 30 by 2 collect i)
228 :alternate-scs (complex-double-stack))
230 ;; A catch or unwind block.
231 (catch-block control-stack :element-size kludge-nondeterministic-catch-block-size))
234 ;;;; Make some random tns for important registers.
236 (macrolet ((defregtn (name sc)
237 (let ((offset-sym (symbolicate name "-OFFSET"))
238 (tn-sym (symbolicate name "-TN")))
239 `(defparameter ,tn-sym
240 (make-random-tn :kind :normal
241 :sc (sc-or-lose ',sc)
242 :offset ,offset-sym)))))
244 ;; These, we access by foo-TN only
246 (defregtn zero any-reg)
247 (defregtn null descriptor-reg)
248 (defregtn code descriptor-reg)
249 (defregtn alloc any-reg)
250 (defregtn bsp any-reg)
251 (defregtn csp any-reg)
252 (defregtn cfp any-reg)
253 (defregtn nsp any-reg)
255 ;; These alias regular locations, so we have to make sure we don't bypass
256 ;; the register allocator when using them.
257 (defregtn nargs any-reg)
258 (defregtn ocfp any-reg)
259 (defregtn lip interior-reg))
261 ;; And some floating point values.
262 (defparameter fp-single-zero-tn
263 (make-random-tn :kind :normal
264 :sc (sc-or-lose 'single-reg)
266 (defparameter fp-double-zero-tn
267 (make-random-tn :kind :normal
268 :sc (sc-or-lose 'double-reg)
272 ;;; If VALUE can be represented as an immediate constant, then return
273 ;;; the appropriate SC number, otherwise return NIL.
274 (!def-vm-support-routine immediate-constant-sc (value)
277 (sc-number-or-lose 'zero))
279 (sc-number-or-lose 'null))
280 ((or fixnum system-area-pointer character)
281 (sc-number-or-lose 'immediate))
283 (if (static-symbol-p value)
284 (sc-number-or-lose 'immediate)
288 (sc-number-or-lose 'fp-single-zero)
292 (sc-number-or-lose 'fp-double-zero)
296 ;;;; Function Call Parameters
298 ;;; The SC numbers for register and stack arguments/return values.
300 (defconstant register-arg-scn (meta-sc-number-or-lose 'descriptor-reg))
301 (defconstant immediate-arg-scn (meta-sc-number-or-lose 'any-reg))
302 (defconstant control-stack-arg-scn (meta-sc-number-or-lose 'control-stack))
304 (eval-when (:compile-toplevel :load-toplevel :execute)
306 ;;; Offsets of special stack frame locations
307 (defconstant ocfp-save-offset 0)
308 (defconstant lra-save-offset 1)
309 (defconstant nfp-save-offset 2)
311 ;;; The number of arguments/return values passed in registers.
313 (defconstant register-arg-count 6)
315 ;;; Names to use for the argument registers.
317 (defconstant-eqx register-arg-names '(a0 a1 a2 a3 a4 a5) #'equal)
322 ;;; A list of TN's describing the register arguments.
324 (defparameter register-arg-tns
325 (mapcar #'(lambda (n)
326 (make-random-tn :kind :normal
327 :sc (sc-or-lose 'descriptor-reg)
329 *register-arg-offsets*))
331 ;;; This is used by the debugger.
332 (defconstant single-value-return-byte-offset 4)
334 ;;; This function is called by debug output routines that want a pretty name
335 ;;; for a TN's location. It returns a thing that can be printed with PRINC.
336 (!def-vm-support-routine location-print-name (tn)
337 (declare (type tn tn))
338 (let ((sb (sb-name (sc-sb (tn-sc tn))))
339 (offset (tn-offset tn)))
341 (registers (or (svref *register-names* offset)
342 (format nil "R~D" offset)))
343 (float-registers (format nil "F~D" offset))
344 (control-stack (format nil "CS~D" offset))
345 (non-descriptor-stack (format nil "NS~D" offset))
346 (constant (format nil "Const~D" offset))
347 (immediate-constant "Immed"))))
349 ;;; The loader uses this to convert alien names to the form they
350 ;;; occure in the symbol table (for example, prepending an
351 ;;; underscore). On the HPPA we just leave it alone.
352 (defun extern-alien-name (name)
353 (declare (type simple-base-string name))