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 \f
  33 ;;;; Symbol hacking VOPs:
  34
  35 ;;; The compiler likes to be able to directly SET symbols.
  36 (define-vop (set cell-set)
  37   (:variant symbol-value-slot other-pointer-lowtag))
  38
  39 ;;; Do a cell ref with an error check for being unbound.
  40 (define-vop (checked-cell-ref)
  41   (:args (object :scs (descriptor-reg) :target obj-temp))
  42   (:results (value :scs (descriptor-reg any-reg)))
  43   (:policy :fast-safe)
  44   (:vop-var vop)
  45   (:save-p :compute-only)
  46   (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
  47
  48 ;;; With Symbol-Value, we check that the value isn't the trap object.
  49 ;;; So Symbol-Value of NIL is NIL.
  50 (define-vop (symbol-value checked-cell-ref)
  51   (:translate symbol-value)
  52   (:generator 9
  53     (move obj-temp object)
  54     (loadw value obj-temp symbol-value-slot other-pointer-lowtag)
  55     (let ((err-lab (generate-error-code vop unbound-symbol-error obj-temp)))
  56       (inst cmp value unbound-marker-widetag)
  57       (inst b :eq err-lab)
  58       (inst nop))))
  59
  60 ;;; Like CHECKED-CELL-REF, only we are a predicate to see if the cell
  61 ;;; is bound.
  62 (define-vop (boundp-frob)
  63   (:args (object :scs (descriptor-reg)))
  64   (:conditional)
  65   (:info target not-p)
  66   (:policy :fast-safe)
  67   (:temporary (:scs (descriptor-reg)) value))
  68
  69 (define-vop (boundp boundp-frob)
  70   (:translate boundp)
  71   (:generator 9
  72     (loadw value object symbol-value-slot other-pointer-lowtag)
  73     (inst cmp value unbound-marker-widetag)
  74     (inst b (if not-p :eq :ne) target)
  75     (inst nop)))
  76
  77 (define-vop (fast-symbol-value cell-ref)
  78   (:variant symbol-value-slot other-pointer-lowtag)
  79   (:policy :fast)
  80   (:translate symbol-value))
  81
  82 (define-vop (symbol-hash)
  83   (:policy :fast-safe)
  84   (:translate symbol-hash)
  85   (:args (symbol :scs (descriptor-reg)))
  86   (:results (res :scs (any-reg)))
  87   (:result-types positive-fixnum)
  88   (:generator 2
  89     ;; The symbol-hash slot of NIL holds NIL because it is also the
  90     ;; cdr slot, so we have to strip off the two low bits to make sure
  91     ;; it is a fixnum.  The lowtag selection magic that is required to
  92     ;; ensure this is explained in the comment in objdef.lisp
  93     (loadw res symbol symbol-hash-slot other-pointer-lowtag)
  94     (inst andn res res fixnum-tag-mask)))
  95 \f
  96 ;;;; FDEFINITION (fdefn) objects.
  97 (define-vop (fdefn-fun cell-ref)
  98   (:variant fdefn-fun-slot other-pointer-lowtag))
  99
 100 (define-vop (safe-fdefn-fun)
 101   (:args (object :scs (descriptor-reg) :target obj-temp))
 102   (:results (value :scs (descriptor-reg any-reg)))
 103   (:vop-var vop)
 104   (:save-p :compute-only)
 105   (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
 106   (:generator 10
 107     (move obj-temp object)
 108     (loadw value obj-temp fdefn-fun-slot other-pointer-lowtag)
 109     (inst cmp value null-tn)
 110     (let ((err-lab (generate-error-code vop undefined-fun-error obj-temp)))
 111       (inst b :eq err-lab))
 112     (inst nop)))
 113
 114 (define-vop (set-fdefn-fun)
 115   (:policy :fast-safe)
 116   (:translate (setf fdefn-fun))
 117   (:args (function :scs (descriptor-reg) :target result)
 118          (fdefn :scs (descriptor-reg)))
 119   (:temporary (:scs (interior-reg)) lip)
 120   (:temporary (:scs (non-descriptor-reg)) type)
 121   (:results (result :scs (descriptor-reg)))
 122   (:generator 38
 123     (let ((normal-fn (gen-label)))
 124       (load-type type function (- fun-pointer-lowtag))
 125       (inst cmp type simple-fun-header-widetag)
 126       (inst b :eq normal-fn)
 127       (inst move lip function)
 128       (inst li lip (make-fixup "closure_tramp" :foreign))
 129       (emit-label normal-fn)
 130       (storew function fdefn fdefn-fun-slot other-pointer-lowtag)
 131       (storew lip fdefn fdefn-raw-addr-slot other-pointer-lowtag)
 132       (move result function))))
 133
 134 (define-vop (fdefn-makunbound)
 135   (:policy :fast-safe)
 136   (:translate fdefn-makunbound)
 137   (:args (fdefn :scs (descriptor-reg) :target result))
 138   (:temporary (:scs (non-descriptor-reg)) temp)
 139   (:results (result :scs (descriptor-reg)))
 140   (:generator 38
 141     (storew null-tn fdefn fdefn-fun-slot other-pointer-lowtag)
 142     (inst li temp (make-fixup "undefined_tramp" :foreign))
 143     (storew temp fdefn fdefn-raw-addr-slot other-pointer-lowtag)
 144     (move result fdefn)))
 145
 146
 147 \f
 148 ;;;; Binding and Unbinding.
 149
 150 ;;; Establish VAL as a binding for SYMBOL.  Save the old value and the
 151 ;;; symbol on the binding stack and stuff the new value into the
 152 ;;; symbol.
 153 (define-vop (bind)
 154   (:args (val :scs (any-reg descriptor-reg))
 155          (symbol :scs (descriptor-reg)))
 156   (:temporary (:scs (descriptor-reg)) temp)
 157   (:generator 5
 158     (loadw temp symbol symbol-value-slot other-pointer-lowtag)
 159     (inst add bsp-tn bsp-tn (* 2 n-word-bytes))
 160     (storew temp bsp-tn (- binding-value-slot binding-size))
 161     (storew symbol bsp-tn (- binding-symbol-slot binding-size))
 162     (storew val symbol symbol-value-slot other-pointer-lowtag)))
 163
 164 (define-vop (unbind)
 165   (:temporary (:scs (descriptor-reg)) symbol value)
 166   (:generator 0
 167     (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 168     (loadw value bsp-tn (- binding-value-slot binding-size))
 169     (storew value symbol symbol-value-slot other-pointer-lowtag)
 170     (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 171     (storew zero-tn bsp-tn (- binding-value-slot binding-size))
 172     (inst sub bsp-tn bsp-tn (* 2 n-word-bytes))))
 173
 174 (define-vop (unbind-to-here)
 175   (:args (arg :scs (descriptor-reg any-reg) :target where))
 176   (:temporary (:scs (any-reg) :from (:argument 0)) where)
 177   (:temporary (:scs (descriptor-reg)) symbol value)
 178   (:generator 0
 179     (let ((loop (gen-label))
 180           (skip (gen-label))
 181           (done (gen-label)))
 182       (move where arg)
 183       (inst cmp where bsp-tn)
 184       (inst b :eq done)
 185       (inst nop)
 186
 187       (emit-label loop)
 188       (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 189       (inst cmp symbol)
 190       (inst b :eq skip)
 191       (loadw value bsp-tn (- binding-value-slot binding-size))
 192       (storew value symbol symbol-value-slot other-pointer-lowtag)
 193       (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 194
 195       (emit-label skip)
 196       (storew zero-tn bsp-tn (- binding-value-slot binding-size))
 197       (inst sub bsp-tn bsp-tn (* 2 n-word-bytes))
 198       (inst cmp where bsp-tn)
 199       (inst b :ne loop)
 200       (inst nop)
 201
 202       (emit-label done))))
 203 \f
 204 ;;;; closure indexing.
 205
 206 (define-vop (closure-index-ref word-index-ref)
 207   (:variant closure-info-offset fun-pointer-lowtag)
 208   (:translate %closure-index-ref))
 209
 210 (define-vop (funcallable-instance-info word-index-ref)
 211   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 212   (:translate %funcallable-instance-info))
 213
 214 (define-vop (set-funcallable-instance-info word-index-set)
 215   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 216   (:translate %set-funcallable-instance-info))
 217
 218 (define-vop (closure-ref slot-ref)
 219   (:variant closure-info-offset fun-pointer-lowtag))
 220
 221 (define-vop (closure-init slot-set)
 222   (:variant closure-info-offset fun-pointer-lowtag))
 223 \f
 224 ;;;; value cell hackery.
 225
 226 (define-vop (value-cell-ref cell-ref)
 227   (:variant value-cell-value-slot other-pointer-lowtag))
 228
 229 (define-vop (value-cell-set cell-set)
 230   (:variant value-cell-value-slot other-pointer-lowtag))
 231 \f
 232 ;;;; instance hackery:
 233
 234 (define-vop (instance-length)
 235   (:policy :fast-safe)
 236   (:translate %instance-length)
 237   (:args (struct :scs (descriptor-reg)))
 238   (:temporary (:scs (non-descriptor-reg)) temp)
 239   (:results (res :scs (unsigned-reg)))
 240   (:result-types positive-fixnum)
 241   (:generator 4
 242     (loadw temp struct 0 instance-pointer-lowtag)
 243     (inst srl res temp n-widetag-bits)))
 244
 245 (define-vop (instance-index-ref word-index-ref)
 246   (:policy :fast-safe)
 247   (:translate %instance-ref)
 248   (:variant instance-slots-offset instance-pointer-lowtag)
 249   (:arg-types * positive-fixnum))
 250
 251 (define-vop (instance-index-set word-index-set)
 252   (:policy :fast-safe)
 253   (:translate %instance-set)
 254   (:variant instance-slots-offset instance-pointer-lowtag)
 255   (:arg-types * positive-fixnum *))
 256 \f
 257 ;;;; Code object frobbing.
 258
 259 (define-vop (code-header-ref word-index-ref)
 260   (:translate code-header-ref)
 261   (:policy :fast-safe)
 262   (:variant 0 other-pointer-lowtag))
 263
 264 (define-vop (code-header-set word-index-set)
 265   (:translate code-header-set)
 266   (:policy :fast-safe)
 267   (:variant 0 other-pointer-lowtag))
 268
 269
 270 \f
 271 ;;;; raw instance slot accessors
 272
 273 (define-vop (raw-instance-ref/word)
 274   (:translate %raw-instance-ref/word)
 275   (:policy :fast-safe)
 276   (:args (object :scs (descriptor-reg))
 277          (index :scs (any-reg)))
 278   (:arg-types * positive-fixnum)
 279   (:results (value :scs (unsigned-reg)))
 280   (:temporary (:scs (non-descriptor-reg)) offset)
 281   (:result-types unsigned-num)
 282   (:generator 5
 283     (loadw offset object 0 instance-pointer-lowtag)
 284     (inst srl offset offset n-widetag-bits)
 285     (inst sll offset offset 2)
 286     (inst sub offset offset index)
 287     (inst add
 288           offset
 289           offset
 290           (- (* (1- instance-slots-offset) n-word-bytes)
 291              instance-pointer-lowtag))
 292     (inst ld value object offset)))
 293
 294 (define-vop (raw-instance-set/word)
 295   (:translate %raw-instance-set/word)
 296   (:policy :fast-safe)
 297   (:args (object :scs (descriptor-reg))
 298          (index :scs (any-reg))
 299          (value :scs (unsigned-reg)))
 300   (:arg-types * positive-fixnum unsigned-num)
 301   (:results (result :scs (unsigned-reg)))
 302   (:temporary (:scs (non-descriptor-reg)) offset)
 303   (:result-types unsigned-num)
 304   (:generator 5
 305     (loadw offset object 0 instance-pointer-lowtag)
 306     (inst srl offset offset n-widetag-bits)
 307     (inst sll offset offset 2)
 308     (inst sub offset offset index)
 309     (inst add
 310           offset
 311           offset
 312           (- (* (1- instance-slots-offset) n-word-bytes)
 313              instance-pointer-lowtag))
 314     (inst st value object offset)
 315     (move result value)))
 316
 317 (define-vop (raw-instance-ref/single)
 318   (:translate %raw-instance-ref/single)
 319   (:policy :fast-safe)
 320   (:args (object :scs (descriptor-reg))
 321          (index :scs (any-reg)))
 322   (:arg-types * positive-fixnum)
 323   (:results (value :scs (single-reg)))
 324   (:temporary (:scs (non-descriptor-reg)) offset)
 325   (:result-types single-float)
 326   (:generator 5
 327     (loadw offset object 0 instance-pointer-lowtag)
 328     (inst srl offset offset n-widetag-bits)
 329     (inst sll offset offset 2)
 330     (inst sub offset offset index)
 331     (inst add
 332           offset
 333           offset
 334           (- (* (1- instance-slots-offset) n-word-bytes)
 335              instance-pointer-lowtag))
 336     (inst ldf value object offset)))
 337
 338 (define-vop (raw-instance-set/single)
 339   (:translate %raw-instance-set/single)
 340   (:policy :fast-safe)
 341   (:args (object :scs (descriptor-reg))
 342          (index :scs (any-reg))
 343          (value :scs (single-reg) :target result))
 344   (:arg-types * positive-fixnum single-float)
 345   (:results (result :scs (single-reg)))
 346   (:result-types single-float)
 347   (:temporary (:scs (non-descriptor-reg)) offset)
 348   (:generator 5
 349     (loadw offset object 0 instance-pointer-lowtag)
 350     (inst srl offset offset n-widetag-bits)
 351     (inst sll offset offset 2)
 352     (inst sub offset offset index)
 353     (inst add
 354           offset
 355           offset
 356           (- (* (1- instance-slots-offset) n-word-bytes)
 357              instance-pointer-lowtag))
 358     (inst stf value object offset)
 359     (unless (location= result value)
 360       (inst fmovs result value))))
 361
 362 (define-vop (raw-instance-ref/double)
 363   (:translate %raw-instance-ref/double)
 364   (:policy :fast-safe)
 365   (:args (object :scs (descriptor-reg))
 366          (index :scs (any-reg)))
 367   (:arg-types * positive-fixnum)
 368   (:results (value :scs (double-reg)))
 369   (:temporary (:scs (non-descriptor-reg)) offset)
 370   (:result-types double-float)
 371   (:generator 5
 372     (loadw offset object 0 instance-pointer-lowtag)
 373     (inst srl offset offset n-widetag-bits)
 374     (inst sll offset offset 2)
 375     (inst sub offset offset index)
 376     (inst add
 377           offset
 378           offset
 379           (- (* (- instance-slots-offset 2) n-word-bytes)
 380              instance-pointer-lowtag))
 381     (inst lddf value object offset)))
 382
 383 (define-vop (raw-instance-set/double)
 384   (:translate %raw-instance-set/double)
 385   (:policy :fast-safe)
 386   (:args (object :scs (descriptor-reg))
 387          (index :scs (any-reg))
 388          (value :scs (double-reg) :target result))
 389   (:arg-types * positive-fixnum double-float)
 390   (:results (result :scs (double-reg)))
 391   (:result-types double-float)
 392   (:temporary (:scs (non-descriptor-reg)) offset)
 393   (:generator 5
 394     (loadw offset object 0 instance-pointer-lowtag)
 395     (inst srl offset offset n-widetag-bits)
 396     (inst sll offset offset 2)
 397     (inst sub offset offset index)
 398     (inst add
 399           offset
 400           offset
 401           (- (* (- instance-slots-offset 2) n-word-bytes)
 402              instance-pointer-lowtag))
 403     (inst stdf value object offset)
 404     (unless (location= result value)
 405       (move-double-reg result value))))
 406
 407 (define-vop (raw-instance-ref/complex-single)
 408   (:translate %raw-instance-ref/complex-single)
 409   (:policy :fast-safe)
 410   (:args (object :scs (descriptor-reg))
 411          (index :scs (any-reg)))
 412   (:arg-types * positive-fixnum)
 413   (:results (value :scs (complex-single-reg)))
 414   (:temporary (:scs (non-descriptor-reg)) offset)
 415   (:result-types complex-single-float)
 416   (:generator 5
 417     (loadw offset object 0 instance-pointer-lowtag)
 418     (inst srl offset offset n-widetag-bits)
 419     (inst sll offset offset 2)
 420     (inst sub offset offset index)
 421     (inst add
 422           offset
 423           offset
 424           (- (* (- instance-slots-offset 2) n-word-bytes)
 425              instance-pointer-lowtag))
 426     (inst ldf (complex-single-reg-real-tn value) object offset)
 427     (inst add offset offset n-word-bytes)
 428     (inst ldf (complex-single-reg-imag-tn value) object offset)))
 429
 430 (define-vop (raw-instance-set/complex-single)
 431   (:translate %raw-instance-set/complex-single)
 432   (:policy :fast-safe)
 433   (:args (object :scs (descriptor-reg))
 434          (index :scs (any-reg))
 435          (value :scs (complex-single-reg) :target result))
 436   (:arg-types * positive-fixnum complex-single-float)
 437   (:results (result :scs (complex-single-reg)))
 438   (:result-types complex-single-float)
 439   (:temporary (:scs (non-descriptor-reg)) offset)
 440   (:generator 5
 441     (loadw offset object 0 instance-pointer-lowtag)
 442     (inst srl offset offset n-widetag-bits)
 443     (inst sll offset offset 2)
 444     (inst sub offset offset index)
 445     (inst add
 446           offset
 447           offset
 448           (- (* (- instance-slots-offset 2) n-word-bytes)
 449              instance-pointer-lowtag))
 450     (let ((value-real (complex-single-reg-real-tn value))
 451           (result-real (complex-single-reg-real-tn result)))
 452       (inst stf value-real object offset)
 453       (unless (location= result-real value-real)
 454         (inst fmovs result-real value-real)))
 455     (inst add offset offset n-word-bytes)
 456     (let ((value-imag (complex-single-reg-imag-tn value))
 457           (result-imag (complex-single-reg-imag-tn result)))
 458       (inst stf value-imag object offset)
 459       (unless (location= result-imag value-imag)
 460         (inst fmovs result-imag value-imag)))))
 461
 462 (define-vop (raw-instance-ref/complex-double)
 463   (:translate %raw-instance-ref/complex-double)
 464   (:policy :fast-safe)
 465   (:args (object :scs (descriptor-reg))
 466          (index :scs (any-reg)))
 467   (:arg-types * positive-fixnum)
 468   (:results (value :scs (complex-double-reg)))
 469   (:temporary (:scs (non-descriptor-reg)) offset)
 470   (:result-types complex-double-float)
 471   (:generator 5
 472     (loadw offset object 0 instance-pointer-lowtag)
 473     (inst srl offset offset n-widetag-bits)
 474     (inst sll offset offset 2)
 475     (inst sub offset offset index)
 476     (inst add
 477           offset
 478           offset
 479           (- (* (- instance-slots-offset 4) n-word-bytes)
 480              instance-pointer-lowtag))
 481     (inst lddf (complex-double-reg-real-tn value) object offset)
 482     (inst add offset offset (* 2 n-word-bytes))
 483     (inst lddf (complex-double-reg-imag-tn value) object offset)))
 484
 485 (define-vop (raw-instance-set/complex-double)
 486   (:translate %raw-instance-set/complex-double)
 487   (:policy :fast-safe)
 488   (:args (object :scs (descriptor-reg))
 489          (index :scs (any-reg))
 490          (value :scs (complex-double-reg) :target result))
 491   (:arg-types * positive-fixnum complex-double-float)
 492   (:results (result :scs (complex-double-reg)))
 493   (:result-types complex-double-float)
 494   (:temporary (:scs (non-descriptor-reg)) offset)
 495   (:generator 5
 496     (loadw offset object 0 instance-pointer-lowtag)
 497     (inst srl offset offset n-widetag-bits)
 498     (inst sll offset offset 2)
 499     (inst sub offset offset index)
 500     (inst add
 501           offset
 502           offset
 503           (- (* (- instance-slots-offset 4) n-word-bytes)
 504              instance-pointer-lowtag))
 505     (let ((value-real (complex-double-reg-real-tn value))
 506           (result-real (complex-double-reg-real-tn result)))
 507       (inst stdf value-real object offset)
 508       (unless (location= result-real value-real)
 509         (move-double-reg result-real value-real)))
 510     (inst add offset offset (* 2 n-word-bytes))
 511     (let ((value-imag (complex-double-reg-imag-tn value))
 512           (result-imag (complex-double-reg-imag-tn result)))
 513       (inst stdf value-imag object offset)
 514       (unless (location= result-imag value-imag)
 515         (move-double-reg result-imag value-imag)))))