5 ;;;; Define the registers
7 (eval-when (:compile-toplevel :load-toplevel :execute)
8 (defvar *register-names* (make-array 32 :initial-element nil)))
10 (macrolet ((defreg (name offset)
11 (let ((offset-sym (symbolicate name "-OFFSET")))
12 `(eval-when (:compile-toplevel :load-toplevel :execute)
13 (def!constant ,offset-sym ,offset)
14 (setf (svref *register-names* ,offset-sym) ,(symbol-name name)))))
16 (defregset (name &rest regs)
17 `(eval-when (:compile-toplevel :load-toplevel :execute)
19 (list ,@(mapcar #'(lambda (name)
20 (symbolicate name "-OFFSET")) regs))))))
24 (defreg rtoc 2) ; May be "NULL" someday.
32 (defreg fdefn 10) ; was nl7
34 ;; FIXME: some kind of comment here would be nice.
36 ;; FIXME II: this also reveals the need to autogenerate lispregs.h
37 #!+darwin (defreg cfunc 12)
38 #!-darwin (defreg nfp 12)
39 #!+darwin (defreg nfp 13)
40 #!-darwin (defreg cfunc 13)
60 (defregset non-descriptor-regs
61 nl0 nl1 nl2 nl3 nl4 nl5 nl6 #+nil nl7 cfunc nargs nfp)
63 (defregset descriptor-regs
64 fdefn a0 a1 a2 a3 ocfp lra cname lexenv l0 l1 l2 )
67 (defregset *register-arg-offsets* a0 a1 a2 a3)
68 (defparameter register-arg-names '(a0 a1 a2 a3)))
72 ;;;; SB and SC definition:
74 (define-storage-base registers :finite :size 32)
75 (define-storage-base float-registers :finite :size 32)
76 (define-storage-base control-stack :unbounded :size 8)
77 (define-storage-base non-descriptor-stack :unbounded :size 0)
78 (define-storage-base constant :non-packed)
79 (define-storage-base immediate-constant :non-packed)
82 ;;; Handy macro so we don't have to keep changing all the numbers whenever
83 ;;; we insert a new storage class.
85 (defmacro define-storage-classes (&rest classes)
86 (do ((forms (list 'progn)
87 (let* ((class (car classes))
89 (constant-name (intern (concatenate 'simple-string
92 (list* `(define-storage-class ,sc-name ,index
94 `(def!constant ,constant-name ,index)
97 (classes classes (cdr classes)))
101 ;; XXX this is most likely wrong. Check with Eric Marsden next time you
103 (def!constant sb!vm::kludge-nondeterministic-catch-block-size 7)
105 (define-storage-classes
107 ;; Non-immediate contstants in the constant pool
110 ;; ZERO and NULL are in registers.
111 (zero immediate-constant)
112 (null immediate-constant)
114 ;; Anything else that can be an immediate.
115 (immediate immediate-constant)
120 ;; The control stack. (Scanned by GC)
121 (control-stack control-stack)
123 ;; The non-descriptor stacks.
124 (signed-stack non-descriptor-stack) ; (signed-byte 32)
125 (unsigned-stack non-descriptor-stack) ; (unsigned-byte 32)
126 (base-char-stack non-descriptor-stack) ; non-descriptor characters.
127 (sap-stack non-descriptor-stack) ; System area pointers.
128 (single-stack non-descriptor-stack) ; single-floats
129 (double-stack non-descriptor-stack
130 :element-size 2 :alignment 2) ; double floats.
131 (complex-single-stack non-descriptor-stack :element-size 2)
132 (complex-double-stack non-descriptor-stack :element-size 4 :alignment 2)
135 ;; **** Things that can go in the integer registers.
137 ;; Immediate descriptor objects. Don't have to be seen by GC, but nothing
138 ;; bad will happen if they are. (fixnums, characters, header values, etc).
141 :locations #.(append non-descriptor-regs descriptor-regs)
142 :constant-scs (zero immediate)
144 :alternate-scs (control-stack))
146 ;; Pointer descriptor objects. Must be seen by GC.
147 (descriptor-reg registers
148 :locations #.descriptor-regs
149 :constant-scs (constant null immediate)
151 :alternate-scs (control-stack))
153 ;; Non-Descriptor characters
154 (base-char-reg registers
155 :locations #.non-descriptor-regs
156 :constant-scs (immediate)
158 :alternate-scs (base-char-stack))
160 ;; Non-Descriptor SAP's (arbitrary pointers into address space)
162 :locations #.non-descriptor-regs
163 :constant-scs (immediate)
165 :alternate-scs (sap-stack))
167 ;; Non-Descriptor (signed or unsigned) numbers.
168 (signed-reg registers
169 :locations #.non-descriptor-regs
170 :constant-scs (zero immediate)
172 :alternate-scs (signed-stack))
173 (unsigned-reg registers
174 :locations #.non-descriptor-regs
175 :constant-scs (zero immediate)
177 :alternate-scs (unsigned-stack))
179 ;; Random objects that must not be seen by GC. Used only as temporaries.
180 (non-descriptor-reg registers
181 :locations #.non-descriptor-regs)
183 ;; Pointers to the interior of objects. Used only as a temporary.
184 (interior-reg registers
185 :locations (#.lip-offset))
188 ;; **** Things that can go in the floating point registers.
190 ;; Non-Descriptor single-floats.
191 (single-reg float-registers
192 :locations #.(loop for i from 0 to 31 collect i)
193 ;; ### Note: We really should have every location listed, but then we
194 ;; would have to make load-tns work with element-sizes other than 1.
197 :alternate-scs (single-stack))
199 ;; Non-Descriptor double-floats.
200 (double-reg float-registers
201 :locations #.(loop for i from 0 to 31 collect i)
202 ;; ### Note: load-tns don't work with an element-size other than 1.
203 ;; :element-size 2 :alignment 2
206 :alternate-scs (double-stack))
208 (complex-single-reg float-registers
209 :locations #.(loop for i from 0 to 30 by 2 collect i)
213 :alternate-scs (complex-single-stack))
215 (complex-double-reg float-registers
216 :locations #.(loop for i from 0 to 30 by 2 collect i)
220 :alternate-scs (complex-double-stack))
222 ;; A catch or unwind block.
223 (catch-block control-stack
224 :element-size sb!vm::kludge-nondeterministic-catch-block-size))
228 ;;;; Make some random tns for important registers.
230 (macrolet ((defregtn (name sc)
231 (let ((offset-sym (symbolicate name "-OFFSET"))
232 (tn-sym (symbolicate name "-TN")))
233 `(defparameter ,tn-sym
234 (make-random-tn :kind :normal
235 :sc (sc-or-lose ',sc)
236 :offset ,offset-sym)))))
238 (defregtn zero any-reg)
239 (defregtn lip interior-reg)
240 (defregtn null descriptor-reg)
241 (defregtn code descriptor-reg)
242 (defregtn alloc any-reg)
244 (defregtn nargs any-reg)
245 (defregtn bsp any-reg)
246 (defregtn csp any-reg)
247 (defregtn cfp any-reg)
248 (defregtn ocfp any-reg)
249 (defregtn nsp any-reg))
251 ;;; If VALUE can be represented as an immediate constant, then return the
252 ;;; appropriate SC number, otherwise return NIL.
253 (!def-vm-support-routine immediate-constant-sc (value)
256 (sc-number-or-lose 'zero))
258 (sc-number-or-lose 'null))
259 ((or fixnum system-area-pointer character)
260 (sc-number-or-lose 'immediate))
262 (if (static-symbol-p value)
263 (sc-number-or-lose 'immediate)
266 ;;;; function call parameters
268 ;;; the SC numbers for register and stack arguments/return values
269 (def!constant register-arg-scn (meta-sc-number-or-lose 'descriptor-reg))
270 (def!constant immediate-arg-scn (meta-sc-number-or-lose 'any-reg))
271 (def!constant control-stack-arg-scn (meta-sc-number-or-lose 'control-stack))
273 (eval-when (:compile-toplevel :load-toplevel :execute)
275 ;;; offsets of special stack frame locations
276 (def!constant ocfp-save-offset 0)
277 (def!constant lra-save-offset 1)
278 (def!constant nfp-save-offset 2)
280 ;;; the number of arguments/return values passed in registers
281 (def!constant register-arg-count 4)
283 ;;; names to use for the argument registers
289 ;;; A list of TN's describing the register arguments.
291 (defparameter *register-arg-tns*
292 (mapcar #'(lambda (n)
293 (make-random-tn :kind :normal
294 :sc (sc-or-lose 'descriptor-reg)
296 *register-arg-offsets*))
298 (export 'single-value-return-byte-offset)
300 ;;; This is used by the debugger.
301 (def!constant single-value-return-byte-offset 8)
303 ;;; This function is called by debug output routines that want a pretty name
304 ;;; for a TN's location. It returns a thing that can be printed with PRINC.
305 (!def-vm-support-routine location-print-name (tn)
306 (declare (type tn tn))
307 (let ((sb (sb-name (sc-sb (tn-sc tn))))
308 (offset (tn-offset tn)))
310 (registers (or (svref *register-names* offset)
311 (format nil "R~D" offset)))
312 (float-registers (format nil "F~D" offset))
313 (control-stack (format nil "CS~D" offset))
314 (non-descriptor-stack (format nil "NS~D" offset))
315 (constant (format nil "Const~D" offset))
316 (immediate-constant "Immed"))))
318 ;;; The loader uses this to convert alien names to the form they
319 ;;; occur in the symbol table. This is ELF, so do nothing.
321 (defun extern-alien-name (name)
322 (declare (type simple-base-string name))
323 ;; Darwin is non-ELF, and needs a _ prefix
324 #!+darwin (concatenate 'string "_" name)
325 ;; The other (ELF) ports currently don't need any prefix