src/compiler/sparc/cell.lisp

   1 ;;;; the VM definition of various primitive memory access VOPs for the
   2 ;;;; Sparc
   3
   4 ;;;; This software is part of the SBCL system. See the README file for
   5 ;;;; more information.
   6 ;;;;
   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.
  12
  13 (in-package "SB!VM")
  14 \f
  15 ;;;; data object ref/set stuff.
  16 (define-vop (slot)
  17   (:args (object :scs (descriptor-reg)))
  18   (:info name offset lowtag)
  19   (:ignore name)
  20   (:results (result :scs (descriptor-reg any-reg)))
  21   (:generator 1
  22     (loadw result object offset lowtag)))
  23
  24 (define-vop (set-slot)
  25   (:args (object :scs (descriptor-reg))
  26          (value :scs (descriptor-reg any-reg)))
  27   (:info name offset lowtag)
  28   (:ignore name)
  29   (:results)
  30   (:generator 1
  31     (storew value object offset lowtag)))
  32
  33 (define-vop (init-slot set-slot)
  34   (:info name dx-p offset lowtag)
  35   (:ignore name dx-p))
  36 \f
  37 ;;;; Symbol hacking VOPs:
  38
  39 ;;; The compiler likes to be able to directly SET symbols.
  40 (define-vop (set cell-set)
  41   (:variant symbol-value-slot other-pointer-lowtag))
  42
  43 ;;; Do a cell ref with an error check for being unbound.
  44 (define-vop (checked-cell-ref)
  45   (:args (object :scs (descriptor-reg) :target obj-temp))
  46   (:results (value :scs (descriptor-reg any-reg)))
  47   (:policy :fast-safe)
  48   (:vop-var vop)
  49   (:save-p :compute-only)
  50   (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
  51
  52 ;;; With Symbol-Value, we check that the value isn't the trap object.
  53 ;;; So Symbol-Value of NIL is NIL.
  54 (define-vop (symbol-value checked-cell-ref)
  55   (:translate symeval)
  56   (:generator 9
  57     (move obj-temp object)
  58     (loadw value obj-temp symbol-value-slot other-pointer-lowtag)
  59     (let ((err-lab (generate-error-code vop 'unbound-symbol-error obj-temp)))
  60       (inst cmp value unbound-marker-widetag)
  61       (inst b :eq err-lab)
  62       (inst nop))))
  63
  64 ;;; Like CHECKED-CELL-REF, only we are a predicate to see if the cell
  65 ;;; is bound.
  66 (define-vop (boundp-frob)
  67   (:args (object :scs (descriptor-reg)))
  68   (:conditional)
  69   (:info target not-p)
  70   (:policy :fast-safe)
  71   (:temporary (:scs (descriptor-reg)) value))
  72
  73 (define-vop (boundp boundp-frob)
  74   (:translate boundp)
  75   (:generator 9
  76     (loadw value object symbol-value-slot other-pointer-lowtag)
  77     (inst cmp value unbound-marker-widetag)
  78     (inst b (if not-p :eq :ne) target)
  79     (inst nop)))
  80
  81 (define-vop (fast-symbol-value cell-ref)
  82   (:variant symbol-value-slot other-pointer-lowtag)
  83   (:policy :fast)
  84   (:translate symeval))
  85
  86 (define-vop (symbol-hash)
  87   (:policy :fast-safe)
  88   (:translate symbol-hash)
  89   (:args (symbol :scs (descriptor-reg)))
  90   (:results (res :scs (any-reg)))
  91   (:result-types positive-fixnum)
  92   (:generator 2
  93     ;; The symbol-hash slot of NIL holds NIL because it is also the
  94     ;; cdr slot, so we have to strip off the two low bits to make sure
  95     ;; it is a fixnum.  The lowtag selection magic that is required to
  96     ;; ensure this is explained in the comment in objdef.lisp
  97     (loadw res symbol symbol-hash-slot other-pointer-lowtag)
  98     (inst andn res res fixnum-tag-mask)))
  99
 100 ;;; On unithreaded builds these are just copies of the non-global versions.
 101 (define-vop (%set-symbol-global-value set))
 102 (define-vop (symbol-global-value symbol-value)
 103   (:translate sym-global-val))
 104 (define-vop (fast-symbol-global-value fast-symbol-value)
 105   (:translate sym-global-val))
 106 \f
 107 ;;;; FDEFINITION (fdefn) objects.
 108 (define-vop (fdefn-fun cell-ref)
 109   (:variant fdefn-fun-slot other-pointer-lowtag))
 110
 111 (define-vop (safe-fdefn-fun)
 112   (:translate safe-fdefn-fun)
 113   (:policy :fast-safe)
 114   (:args (object :scs (descriptor-reg) :target obj-temp))
 115   (:results (value :scs (descriptor-reg any-reg)))
 116   (:vop-var vop)
 117   (:save-p :compute-only)
 118   (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
 119   (:generator 10
 120     (move obj-temp object)
 121     (loadw value obj-temp fdefn-fun-slot other-pointer-lowtag)
 122     (inst cmp value null-tn)
 123     (let ((err-lab (generate-error-code vop 'undefined-fun-error obj-temp)))
 124       (inst b :eq err-lab))
 125     (inst nop)))
 126
 127 (define-vop (set-fdefn-fun)
 128   (:policy :fast-safe)
 129   (:translate (setf fdefn-fun))
 130   (:args (function :scs (descriptor-reg) :target result)
 131          (fdefn :scs (descriptor-reg)))
 132   (:temporary (:scs (interior-reg)) lip)
 133   (:temporary (:scs (non-descriptor-reg)) type)
 134   (:results (result :scs (descriptor-reg)))
 135   (:generator 38
 136     (let ((normal-fn (gen-label)))
 137       (load-type type function (- fun-pointer-lowtag))
 138       (inst cmp type simple-fun-widetag)
 139       (inst b :eq normal-fn)
 140       (inst move lip function)
 141       (inst li lip (make-fixup 'closure-tramp :assembly-routine))
 142       (emit-label normal-fn)
 143       (storew function fdefn fdefn-fun-slot other-pointer-lowtag)
 144       (storew lip fdefn fdefn-raw-addr-slot other-pointer-lowtag)
 145       (move result function))))
 146
 147 (define-vop (fdefn-makunbound)
 148   (:policy :fast-safe)
 149   (:translate fdefn-makunbound)
 150   (:args (fdefn :scs (descriptor-reg) :target result))
 151   (:temporary (:scs (non-descriptor-reg)) temp)
 152   (:results (result :scs (descriptor-reg)))
 153   (:generator 38
 154     (storew null-tn fdefn fdefn-fun-slot other-pointer-lowtag)
 155     (inst li temp (make-fixup 'undefined-tramp :assembly-routine))
 156     (storew temp fdefn fdefn-raw-addr-slot other-pointer-lowtag)
 157     (move result fdefn)))
 158
 159
 160 \f
 161 ;;;; Binding and Unbinding.
 162
 163 ;;; Establish VAL as a binding for SYMBOL.  Save the old value and the
 164 ;;; symbol on the binding stack and stuff the new value into the
 165 ;;; symbol.
 166 ;;;
 167 ;;; See the "Chapter 9: Specials" of the SBCL Internals Manual.
 168
 169 (define-vop (dynbind)
 170   (:args (val :scs (any-reg descriptor-reg))
 171          (symbol :scs (descriptor-reg)))
 172   (:temporary (:scs (descriptor-reg)) temp)
 173   (:generator 5
 174     (loadw temp symbol symbol-value-slot other-pointer-lowtag)
 175     (inst add bsp-tn bsp-tn (* 2 n-word-bytes))
 176     (storew temp bsp-tn (- binding-value-slot binding-size))
 177     (storew symbol bsp-tn (- binding-symbol-slot binding-size))
 178     (storew val symbol symbol-value-slot other-pointer-lowtag)))
 179
 180 (define-vop (unbind)
 181   (:temporary (:scs (descriptor-reg)) symbol value)
 182   (:generator 0
 183     (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 184     (loadw value bsp-tn (- binding-value-slot binding-size))
 185     (storew value symbol symbol-value-slot other-pointer-lowtag)
 186     (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 187     (storew zero-tn bsp-tn (- binding-value-slot binding-size))
 188     (inst sub bsp-tn bsp-tn (* 2 n-word-bytes))))
 189
 190 (define-vop (unbind-to-here)
 191   (:args (arg :scs (descriptor-reg any-reg) :target where))
 192   (:temporary (:scs (any-reg) :from (:argument 0)) where)
 193   (:temporary (:scs (descriptor-reg)) symbol value)
 194   (:generator 0
 195     (let ((loop (gen-label))
 196           (skip (gen-label))
 197           (done (gen-label)))
 198       (move where arg)
 199       (inst cmp where bsp-tn)
 200       (inst b :eq done)
 201       (inst nop)
 202
 203       (emit-label loop)
 204       (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 205       (inst cmp symbol)
 206       (inst b :eq skip)
 207       (loadw value bsp-tn (- binding-value-slot binding-size))
 208       (storew value symbol symbol-value-slot other-pointer-lowtag)
 209       (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 210
 211       (emit-label skip)
 212       (storew zero-tn bsp-tn (- binding-value-slot binding-size))
 213       (inst sub bsp-tn bsp-tn (* 2 n-word-bytes))
 214       (inst cmp where bsp-tn)
 215       (inst b :ne loop)
 216       (inst nop)
 217
 218       (emit-label done))))
 219 \f
 220 ;;;; closure indexing.
 221
 222 (define-vop (closure-index-ref word-index-ref)
 223   (:variant closure-info-offset fun-pointer-lowtag)
 224   (:translate %closure-index-ref))
 225
 226 (define-vop (funcallable-instance-info word-index-ref)
 227   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 228   (:translate %funcallable-instance-info))
 229
 230 (define-vop (set-funcallable-instance-info word-index-set)
 231   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 232   (:translate %set-funcallable-instance-info))
 233
 234 (define-vop (closure-ref slot-ref)
 235   (:variant closure-info-offset fun-pointer-lowtag))
 236
 237 (define-vop (closure-init slot-set)
 238   (:variant closure-info-offset fun-pointer-lowtag))
 239
 240 (define-vop (closure-init-from-fp)
 241   (:args (object :scs (descriptor-reg)))
 242   (:info offset)
 243   (:generator 4
 244     (storew cfp-tn object (+ closure-info-offset offset) fun-pointer-lowtag)))
 245 \f
 246 ;;;; value cell hackery.
 247
 248 (define-vop (value-cell-ref cell-ref)
 249   (:variant value-cell-value-slot other-pointer-lowtag))
 250
 251 (define-vop (value-cell-set cell-set)
 252   (:variant value-cell-value-slot other-pointer-lowtag))
 253 \f
 254 ;;;; instance hackery:
 255
 256 (define-vop (instance-length)
 257   (:policy :fast-safe)
 258   (:translate %instance-length)
 259   (:args (struct :scs (descriptor-reg)))
 260   (:temporary (:scs (non-descriptor-reg)) temp)
 261   (:results (res :scs (unsigned-reg)))
 262   (:result-types positive-fixnum)
 263   (:generator 4
 264     (loadw temp struct 0 instance-pointer-lowtag)
 265     (inst srl res temp n-widetag-bits)))
 266
 267 (define-vop (instance-index-ref word-index-ref)
 268   (:policy :fast-safe)
 269   (:translate %instance-ref)
 270   (:variant instance-slots-offset instance-pointer-lowtag)
 271   (:arg-types * positive-fixnum))
 272
 273 (define-vop (instance-index-set word-index-set)
 274   (:policy :fast-safe)
 275   (:translate %instance-set)
 276   (:variant instance-slots-offset instance-pointer-lowtag)
 277   (:arg-types * positive-fixnum *))
 278 \f
 279 ;;;; Code object frobbing.
 280
 281 (define-vop (code-header-ref word-index-ref)
 282   (:translate code-header-ref)
 283   (:policy :fast-safe)
 284   (:variant 0 other-pointer-lowtag))
 285
 286 (define-vop (code-header-set word-index-set)
 287   (:translate code-header-set)
 288   (:policy :fast-safe)
 289   (:variant 0 other-pointer-lowtag))
 290
 291
 292 \f
 293 ;;;; raw instance slot accessors
 294
 295 (define-vop (raw-instance-ref/word)
 296   (:translate %raw-instance-ref/word)
 297   (:policy :fast-safe)
 298   (:args (object :scs (descriptor-reg))
 299          (index :scs (any-reg)))
 300   (:arg-types * positive-fixnum)
 301   (:results (value :scs (unsigned-reg)))
 302   (:temporary (:scs (non-descriptor-reg)) offset)
 303   (:result-types unsigned-num)
 304   (:generator 5
 305     (inst add offset index (- (ash instance-slots-offset word-shift)
 306                               instance-pointer-lowtag))
 307     (inst ld value object offset)))
 308
 309 (define-vop (raw-instance-set/word)
 310   (:translate %raw-instance-set/word)
 311   (:policy :fast-safe)
 312   (:args (object :scs (descriptor-reg))
 313          (index :scs (any-reg))
 314          (value :scs (unsigned-reg)))
 315   (:arg-types * positive-fixnum unsigned-num)
 316   (:results (result :scs (unsigned-reg)))
 317   (:temporary (:scs (non-descriptor-reg)) offset)
 318   (:result-types unsigned-num)
 319   (:generator 5
 320     (inst add offset index (- (ash instance-slots-offset word-shift)
 321                               instance-pointer-lowtag))
 322     (inst st value object offset)
 323     (move result value)))
 324
 325 (define-vop (raw-instance-ref/single)
 326   (:translate %raw-instance-ref/single)
 327   (:policy :fast-safe)
 328   (:args (object :scs (descriptor-reg))
 329          (index :scs (any-reg)))
 330   (:arg-types * positive-fixnum)
 331   (:results (value :scs (single-reg)))
 332   (:temporary (:scs (non-descriptor-reg)) offset)
 333   (:result-types single-float)
 334   (:generator 5
 335     (inst add offset index (- (ash instance-slots-offset word-shift)
 336                               instance-pointer-lowtag))
 337     (inst ldf value object offset)))
 338
 339 (define-vop (raw-instance-set/single)
 340   (:translate %raw-instance-set/single)
 341   (:policy :fast-safe)
 342   (:args (object :scs (descriptor-reg))
 343          (index :scs (any-reg))
 344          (value :scs (single-reg) :target result))
 345   (:arg-types * positive-fixnum single-float)
 346   (:results (result :scs (single-reg)))
 347   (:result-types single-float)
 348   (:temporary (:scs (non-descriptor-reg)) offset)
 349   (:generator 5
 350     (inst add offset index (- (ash instance-slots-offset word-shift)
 351                               instance-pointer-lowtag))
 352     (inst stf value object offset)
 353     (unless (location= result value)
 354       (inst fmovs result value))))
 355
 356 (define-vop (raw-instance-ref/double)
 357   (:translate %raw-instance-ref/double)
 358   (:policy :fast-safe)
 359   (:args (object :scs (descriptor-reg))
 360          (index :scs (any-reg)))
 361   (:arg-types * positive-fixnum)
 362   (:results (value :scs (double-reg)))
 363   (:temporary (:scs (non-descriptor-reg)) offset)
 364   (:result-types double-float)
 365   (:generator 5
 366     (inst add offset index (- (ash instance-slots-offset word-shift)
 367                               instance-pointer-lowtag))
 368     (inst lddf value object offset)))
 369
 370 (define-vop (raw-instance-set/double)
 371   (:translate %raw-instance-set/double)
 372   (:policy :fast-safe)
 373   (:args (object :scs (descriptor-reg))
 374          (index :scs (any-reg))
 375          (value :scs (double-reg) :target result))
 376   (:arg-types * positive-fixnum double-float)
 377   (:results (result :scs (double-reg)))
 378   (:result-types double-float)
 379   (:temporary (:scs (non-descriptor-reg)) offset)
 380   (:generator 5
 381     (inst add offset index (- (ash instance-slots-offset word-shift)
 382                               instance-pointer-lowtag))
 383     (inst stdf value object offset)
 384     (unless (location= result value)
 385       (move-double-reg result value))))
 386
 387 (define-vop (raw-instance-ref/complex-single)
 388   (:translate %raw-instance-ref/complex-single)
 389   (:policy :fast-safe)
 390   (:args (object :scs (descriptor-reg))
 391          (index :scs (any-reg)))
 392   (:arg-types * positive-fixnum)
 393   (:results (value :scs (complex-single-reg)))
 394   (:temporary (:scs (non-descriptor-reg)) offset)
 395   (:result-types complex-single-float)
 396   (:generator 5
 397     (inst add offset index (- (ash instance-slots-offset word-shift)
 398                               instance-pointer-lowtag))
 399     (inst ldf (complex-single-reg-real-tn value) object offset)
 400     (inst add offset offset n-word-bytes)
 401     (inst ldf (complex-single-reg-imag-tn value) object offset)))
 402
 403 (define-vop (raw-instance-set/complex-single)
 404   (:translate %raw-instance-set/complex-single)
 405   (:policy :fast-safe)
 406   (:args (object :scs (descriptor-reg))
 407          (index :scs (any-reg))
 408          (value :scs (complex-single-reg) :target result))
 409   (:arg-types * positive-fixnum complex-single-float)
 410   (:results (result :scs (complex-single-reg)))
 411   (:result-types complex-single-float)
 412   (:temporary (:scs (non-descriptor-reg)) offset)
 413   (:generator 5
 414     (inst add offset index (- (ash instance-slots-offset word-shift)
 415                               instance-pointer-lowtag))
 416     (let ((value-real (complex-single-reg-real-tn value))
 417           (result-real (complex-single-reg-real-tn result)))
 418       (inst stf value-real object offset)
 419       (unless (location= result-real value-real)
 420         (inst fmovs result-real value-real)))
 421     (inst add offset offset n-word-bytes)
 422     (let ((value-imag (complex-single-reg-imag-tn value))
 423           (result-imag (complex-single-reg-imag-tn result)))
 424       (inst stf value-imag object offset)
 425       (unless (location= result-imag value-imag)
 426         (inst fmovs result-imag value-imag)))))
 427
 428 (define-vop (raw-instance-ref/complex-double)
 429   (:translate %raw-instance-ref/complex-double)
 430   (:policy :fast-safe)
 431   (:args (object :scs (descriptor-reg))
 432          (index :scs (any-reg)))
 433   (:arg-types * positive-fixnum)
 434   (:results (value :scs (complex-double-reg)))
 435   (:temporary (:scs (non-descriptor-reg)) offset)
 436   (:result-types complex-double-float)
 437   (:generator 5
 438     (inst add offset index (- (ash instance-slots-offset word-shift)
 439                               instance-pointer-lowtag))
 440     (inst lddf (complex-double-reg-real-tn value) object offset)
 441     (inst add offset offset (* 2 n-word-bytes))
 442     (inst lddf (complex-double-reg-imag-tn value) object offset)))
 443
 444 (define-vop (raw-instance-set/complex-double)
 445   (:translate %raw-instance-set/complex-double)
 446   (:policy :fast-safe)
 447   (:args (object :scs (descriptor-reg))
 448          (index :scs (any-reg))
 449          (value :scs (complex-double-reg) :target result))
 450   (:arg-types * positive-fixnum complex-double-float)
 451   (:results (result :scs (complex-double-reg)))
 452   (:result-types complex-double-float)
 453   (:temporary (:scs (non-descriptor-reg)) offset)
 454   (:generator 5
 455     (inst add offset index (- (ash instance-slots-offset word-shift)
 456                               instance-pointer-lowtag))
 457     (let ((value-real (complex-double-reg-real-tn value))
 458           (result-real (complex-double-reg-real-tn result)))
 459       (inst stdf value-real object offset)
 460       (unless (location= result-real value-real)
 461         (move-double-reg result-real value-real)))
 462     (inst add offset offset (* 2 n-word-bytes))
 463     (let ((value-imag (complex-double-reg-imag-tn value))
 464           (result-imag (complex-double-reg-imag-tn result)))
 465       (inst stdf value-imag object offset)
 466       (unless (location= result-imag value-imag)
 467         (move-double-reg result-imag value-imag)))))