src/compiler/ppc/vm.lisp

   1 ;;;; miscellaneous VM definition noise for the PPC
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   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.
  11
  12 (in-package "SB!VM")
  13
  14 ;;; NUMBER-STACK-DISPLACEMENT
  15 ;;;
  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.
  19 ;;;
  20 (def!constant number-stack-displacement
  21   (* #!-darwin 2
  22      #!+darwin 8
  23      n-word-bytes))
  24 \f
  25 ;;;; Define the registers
  26
  27 (eval-when (:compile-toplevel :load-toplevel :execute)
  28   (defvar *register-names* (make-array 32 :initial-element nil)))
  29
  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)))))
  35
  36            (defregset (name &rest regs)
  37                `(eval-when (:compile-toplevel :load-toplevel :execute)
  38                  (defparameter ,name
  39                    (list ,@(mapcar #'(lambda (name)
  40                                        (symbolicate name "-OFFSET")) regs))))))
  41
  42   (defreg zero 0)
  43   (defreg nsp 1)
  44   (defreg rtoc 2)                         ; May be "NULL" someday.
  45   (defreg nl0 3)
  46   (defreg nl1 4)
  47   (defreg nl2 5)
  48   (defreg nl3 6)
  49   (defreg nl4 7)
  50   (defreg nl5 8)
  51   (defreg nl6 9)
  52   (defreg fdefn 10)                     ; was nl7
  53   (defreg nargs 11)
  54   ;; FIXME: some kind of comment here would be nice.
  55   ;;
  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)
  61   (defreg bsp 14)
  62   (defreg cfp 15)
  63   (defreg csp 16)
  64   (defreg alloc 17)
  65   (defreg null 18)
  66   (defreg code 19)
  67   (defreg cname 20)
  68   (defreg lexenv 21)
  69   (defreg ocfp 22)
  70   (defreg lra 23)
  71   (defreg a0 24)
  72   (defreg a1 25)
  73   (defreg a2 26)
  74   (defreg a3 27)
  75   (defreg l0 28)
  76   (defreg l1 29)
  77   (defreg l2 30)
  78   (defreg lip 31)
  79
  80   (defregset non-descriptor-regs
  81       nl0 nl1 nl2 nl3 nl4 nl5 nl6 #+nil nl7 cfunc nargs nfp)
  82
  83   (defregset descriptor-regs
  84       fdefn a0 a1 a2 a3  ocfp lra cname lexenv l0 l1 l2 )
  85
  86
  87  (defregset *register-arg-offsets*  a0 a1 a2 a3)
  88  (defparameter register-arg-names '(a0 a1 a2 a3)))
  89
  90
  91 \f
  92 ;;;; SB and SC definition:
  93
  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)
 100
 101 ;;;
 102 ;;; Handy macro so we don't have to keep changing all the numbers whenever
 103 ;;; we insert a new storage class.
 104 ;;;
 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
 110                                                          (string sc-name)
 111                                                          "-SC-NUMBER"))))
 112                 (list* `(define-storage-class ,sc-name ,index
 113                           ,@(cdr class))
 114                        `(def!constant ,constant-name ,index)
 115                        forms)))
 116        (index 0 (1+ index))
 117        (classes classes (cdr classes)))
 118       ((null classes)
 119        (nreverse forms))))
 120
 121 (def!constant kludge-nondeterministic-catch-block-size 7)
 122
 123 (define-storage-classes
 124
 125   ;; Non-immediate contstants in the constant pool
 126   (constant constant)
 127
 128   ;; ZERO and NULL are in registers.
 129   (zero immediate-constant)
 130   (null immediate-constant)
 131
 132   ;; Anything else that can be an immediate.
 133   (immediate immediate-constant)
 134
 135
 136   ;; **** The stacks.
 137
 138   ;; The control stack.  (Scanned by GC)
 139   (control-stack control-stack)
 140
 141   ;; We put ANY-REG and DESCRIPTOR-REG early so that their SC-NUMBER
 142   ;; is small and therefore the error trap information is smaller.
 143   ;; Moving them up here from their previous place down below saves
 144   ;; ~250K in core file size.  --njf, 2006-01-27
 145
 146   ;; Immediate descriptor objects.  Don't have to be seen by GC, but nothing
 147   ;; bad will happen if they are.  (fixnums, characters, header values, etc).
 148   (any-reg
 149    registers
 150    :locations #.(append non-descriptor-regs descriptor-regs)
 151    :constant-scs (zero immediate)
 152    :save-p t
 153    :alternate-scs (control-stack))
 154
 155   ;; Pointer descriptor objects.  Must be seen by GC.
 156   (descriptor-reg registers
 157    :locations #.descriptor-regs
 158    :constant-scs (constant null immediate)
 159    :save-p t
 160    :alternate-scs (control-stack))
 161
 162   ;; The non-descriptor stacks.
 163   (signed-stack non-descriptor-stack) ; (signed-byte 32)
 164   (unsigned-stack non-descriptor-stack) ; (unsigned-byte 32)
 165   (character-stack non-descriptor-stack) ; non-descriptor characters.
 166   (sap-stack non-descriptor-stack) ; System area pointers.
 167   (single-stack non-descriptor-stack) ; single-floats
 168   (double-stack non-descriptor-stack
 169                 :element-size 2 :alignment 2) ; double floats.
 170   (complex-single-stack non-descriptor-stack :element-size 2)
 171   (complex-double-stack non-descriptor-stack :element-size 4 :alignment 2)
 172
 173
 174   ;; **** Things that can go in the integer registers.
 175
 176   ;; Non-Descriptor characters
 177   (character-reg registers
 178    :locations #.non-descriptor-regs
 179    :constant-scs (immediate)
 180    :save-p t
 181    :alternate-scs (character-stack))
 182
 183   ;; Non-Descriptor SAP's (arbitrary pointers into address space)
 184   (sap-reg registers
 185    :locations #.non-descriptor-regs
 186    :constant-scs (immediate)
 187    :save-p t
 188    :alternate-scs (sap-stack))
 189
 190   ;; Non-Descriptor (signed or unsigned) numbers.
 191   (signed-reg registers
 192    :locations #.non-descriptor-regs
 193    :constant-scs (zero immediate)
 194    :save-p t
 195    :alternate-scs (signed-stack))
 196   (unsigned-reg registers
 197    :locations #.non-descriptor-regs
 198    :constant-scs (zero immediate)
 199    :save-p t
 200    :alternate-scs (unsigned-stack))
 201
 202   ;; Random objects that must not be seen by GC.  Used only as temporaries.
 203   (non-descriptor-reg registers
 204    :locations #.non-descriptor-regs)
 205
 206   ;; Pointers to the interior of objects.  Used only as a temporary.
 207   (interior-reg registers
 208    :locations (#.lip-offset))
 209
 210
 211   ;; **** Things that can go in the floating point registers.
 212
 213   ;; Non-Descriptor single-floats.
 214   (single-reg float-registers
 215    :locations #.(loop for i from 0 to 31 collect i)
 216    ;; ### Note: We really should have every location listed, but then we
 217    ;; would have to make load-tns work with element-sizes other than 1.
 218    :constant-scs ()
 219    :save-p t
 220    :alternate-scs (single-stack))
 221
 222   ;; Non-Descriptor double-floats.
 223   (double-reg float-registers
 224    :locations #.(loop for i from 0 to 31 collect i)
 225    ;; ### Note: load-tns don't work with an element-size other than 1.
 226    ;; :element-size 2 :alignment 2
 227    :constant-scs ()
 228    :save-p t
 229    :alternate-scs (double-stack))
 230
 231   (complex-single-reg float-registers
 232    :locations #.(loop for i from 0 to 30 by 2 collect i)
 233    :element-size 2
 234    :constant-scs ()
 235    :save-p t
 236    :alternate-scs (complex-single-stack))
 237
 238   (complex-double-reg float-registers
 239    :locations #.(loop for i from 0 to 30 by 2 collect i)
 240    :element-size 2
 241    :constant-scs ()
 242    :save-p t
 243    :alternate-scs (complex-double-stack))
 244
 245   ;; A catch or unwind block.
 246   (catch-block control-stack
 247                :element-size kludge-nondeterministic-catch-block-size))
 248 \f
 249 ;;;; Make some random tns for important registers.
 250
 251 (macrolet ((defregtn (name sc)
 252                (let ((offset-sym (symbolicate name "-OFFSET"))
 253                      (tn-sym (symbolicate name "-TN")))
 254                  `(defparameter ,tn-sym
 255                    (make-random-tn :kind :normal
 256                     :sc (sc-or-lose ',sc)
 257                     :offset ,offset-sym)))))
 258
 259   (defregtn zero any-reg)
 260   (defregtn lip interior-reg)
 261   (defregtn null descriptor-reg)
 262   (defregtn code descriptor-reg)
 263   (defregtn alloc any-reg)
 264
 265   (defregtn nargs any-reg)
 266   (defregtn bsp any-reg)
 267   (defregtn csp any-reg)
 268   (defregtn cfp any-reg)
 269   (defregtn ocfp any-reg)
 270   (defregtn nsp any-reg))
 271 \f
 272 ;;; If VALUE can be represented as an immediate constant, then return the
 273 ;;; appropriate SC number, otherwise return NIL.
 274 (!def-vm-support-routine immediate-constant-sc (value)
 275   (typecase value
 276     ((integer 0 0)
 277      (sc-number-or-lose 'zero))
 278     (null
 279      (sc-number-or-lose 'null))
 280     ((or (integer #.sb!xc:most-negative-fixnum #.sb!xc:most-positive-fixnum)
 281          system-area-pointer character)
 282      (sc-number-or-lose 'immediate))
 283     (symbol
 284      (if (static-symbol-p value)
 285          (sc-number-or-lose 'immediate)
 286          nil))))
 287 \f
 288 ;;;; function call parameters
 289
 290 ;;; the SC numbers for register and stack arguments/return values
 291 (def!constant register-arg-scn (meta-sc-number-or-lose 'descriptor-reg))
 292 (def!constant immediate-arg-scn (meta-sc-number-or-lose 'any-reg))
 293 (def!constant control-stack-arg-scn (meta-sc-number-or-lose 'control-stack))
 294
 295 (eval-when (:compile-toplevel :load-toplevel :execute)
 296
 297 ;;; offsets of special stack frame locations
 298 (def!constant ocfp-save-offset 0)
 299 (def!constant lra-save-offset 1)
 300 (def!constant nfp-save-offset 2)
 301
 302 ;;; the number of arguments/return values passed in registers
 303 (def!constant register-arg-count 4)
 304
 305 ;;; names to use for the argument registers
 306
 307
 308 ) ; EVAL-WHEN
 309
 310
 311 ;;; A list of TN's describing the register arguments.
 312 ;;;
 313 (defparameter *register-arg-tns*
 314   (mapcar #'(lambda (n)
 315               (make-random-tn :kind :normal
 316                               :sc (sc-or-lose 'descriptor-reg)
 317                               :offset n))
 318           *register-arg-offsets*))
 319
 320 (export 'single-value-return-byte-offset)
 321
 322 ;;; This is used by the debugger.
 323 (def!constant single-value-return-byte-offset 8)
 324 \f
 325 ;;; This function is called by debug output routines that want a pretty name
 326 ;;; for a TN's location.  It returns a thing that can be printed with PRINC.
 327 (!def-vm-support-routine location-print-name (tn)
 328   (declare (type tn tn))
 329   (let ((sb (sb-name (sc-sb (tn-sc tn))))
 330         (offset (tn-offset tn)))
 331     (ecase sb
 332       (registers (or (svref *register-names* offset)
 333                      (format nil "R~D" offset)))
 334       (float-registers (format nil "F~D" offset))
 335       (control-stack (format nil "CS~D" offset))
 336       (non-descriptor-stack (format nil "NS~D" offset))
 337       (constant (format nil "Const~D" offset))
 338       (immediate-constant "Immed"))))
 339
 340 (!def-vm-support-routine combination-implementation-style (node)
 341   (declare (type sb!c::combination node))
 342   (flet ((valid-funtype (args result)
 343            (sb!c::valid-fun-use node
 344                                 (sb!c::specifier-type
 345                                  `(function ,args ,result)))))
 346     (case (sb!c::combination-fun-source-name node)
 347       (logtest
 348        (cond
 349          ((or (valid-funtype '(fixnum fixnum) '*)
 350               (valid-funtype '((signed-byte 32) (signed-byte 32)) '*)
 351               (valid-funtype '((unsigned-byte 32) (unsigned-byte 32)) '*))
 352           (values :direct nil))
 353          (t (values :default nil))))
 354       (logbitp
 355        (cond
 356          ((or (valid-funtype '((constant-arg (integer 0 29)) fixnum) '*)
 357               (valid-funtype '((constant-arg (integer 0 31)) (signed-byte 32)) '*)
 358               (valid-funtype '((constant-arg (integer 0 31)) (unsigned-byte 32)) '*))
 359           (values :transform '(lambda (index integer)
 360                                (%logbitp integer index))))
 361          (t (values :default nil))))
 362       ;; FIXME: can handle MIN and MAX here
 363       (sb!kernel:%ldb
 364        (cond
 365          ((or (valid-funtype '((constant-arg (integer 1 29))
 366                                (constant-arg (integer 0 29))
 367                                fixnum)
 368                              'fixnum)
 369               (valid-funtype '((constant-arg (integer 1 29))
 370                                (constant-arg (integer 0 29))
 371                                (signed-byte 32))
 372                              'fixnum)
 373               (valid-funtype '((constant-arg (integer 1 29))
 374                                (constant-arg (integer 0 29))
 375                                (unsigned-byte 32))
 376                              'fixnum))
 377           (values :transform
 378                   '(lambda (size posn integer)
 379                     (%%ldb integer size posn))))
 380          (t (values :default nil))))
 381       (t (values :default nil)))))