src/compiler/ppc/cell.lisp

   1 ;;;; the VM definition of various primitive memory access VOPs for the
   2 ;;;; PPC
   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
  17 (define-vop (slot)
  18   (:args (object :scs (descriptor-reg)))
  19   (:info name offset lowtag)
  20   (:ignore name)
  21   (:results (result :scs (descriptor-reg any-reg)))
  22   (:generator 1
  23     (loadw result object offset lowtag)))
  24
  25 (define-vop (set-slot)
  26   (:args (object :scs (descriptor-reg))
  27          (value :scs (descriptor-reg any-reg)))
  28   (:info name offset lowtag)
  29   (:ignore name)
  30   (:results)
  31   (:generator 1
  32     (storew value object offset lowtag)))
  33
  34 \f
  35 ;;;; Symbol hacking VOPs:
  36
  37 ;;; The compiler likes to be able to directly SET symbols.
  38 (define-vop (set cell-set)
  39   (:variant symbol-value-slot other-pointer-lowtag))
  40
  41 ;;; Do a cell ref with an error check for being unbound.
  42 (define-vop (checked-cell-ref)
  43   (:args (object :scs (descriptor-reg) :target obj-temp))
  44   (:results (value :scs (descriptor-reg any-reg)))
  45   (:policy :fast-safe)
  46   (:vop-var vop)
  47   (:save-p :compute-only)
  48   (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp))
  49
  50 ;;; With SYMBOL-VALUE, we check that the value isn't the trap object.
  51 ;;; So SYMBOL-VALUE of NIL is NIL.
  52 (define-vop (symbol-value checked-cell-ref)
  53   (:translate symbol-value)
  54   (:generator 9
  55     (move obj-temp object)
  56     (loadw value obj-temp symbol-value-slot other-pointer-lowtag)
  57     (let ((err-lab (generate-error-code vop unbound-symbol-error obj-temp)))
  58       (inst cmpwi value unbound-marker-widetag)
  59       (inst beq err-lab))))
  60
  61 ;;; Like CHECKED-CELL-REF, only we are a predicate to see if the cell
  62 ;;; is bound.
  63 (define-vop (boundp-frob)
  64   (:args (object :scs (descriptor-reg)))
  65   (:conditional)
  66   (:info target not-p)
  67   (:policy :fast-safe)
  68   (:temporary (:scs (descriptor-reg)) value))
  69
  70 (define-vop (boundp boundp-frob)
  71   (:translate boundp)
  72   (:generator 9
  73     (loadw value object symbol-value-slot other-pointer-lowtag)
  74     (inst cmpwi value unbound-marker-widetag)
  75     (inst b? (if not-p :eq :ne) target)))
  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 clrrwi res res n-fixnum-tag-bits)))
  95 \f
  96 ;;;; Fdefinition (fdefn) objects.
  97
  98 (define-vop (fdefn-fun cell-ref)
  99   (:variant fdefn-fun-slot other-pointer-lowtag))
 100
 101 (define-vop (safe-fdefn-fun)
 102   (:args (object :scs (descriptor-reg) :target obj-temp))
 103   (:results (value :scs (descriptor-reg any-reg)))
 104   (:vop-var vop)
 105   (:save-p :compute-only)
 106   (:temporary (:scs (descriptor-reg) :from (:argument 0)) obj-temp)
 107   (:generator 10
 108     (move obj-temp object)
 109     (loadw value obj-temp fdefn-fun-slot other-pointer-lowtag)
 110     (inst cmpw value null-tn)
 111     (let ((err-lab (generate-error-code vop undefined-fun-error obj-temp)))
 112       (inst beq err-lab))))
 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 cmpwi type simple-fun-header-widetag)
 126       ;;(inst mr lip function)
 127       (inst addi lip function
 128             (- (ash simple-fun-code-offset word-shift) fun-pointer-lowtag))
 129       (inst beq normal-fn)
 130       (inst lr lip  (make-fixup "closure_tramp" :foreign))
 131       (emit-label normal-fn)
 132       (storew lip fdefn fdefn-raw-addr-slot other-pointer-lowtag)
 133       (storew function fdefn fdefn-fun-slot other-pointer-lowtag)
 134       (move result function))))
 135
 136 (define-vop (fdefn-makunbound)
 137   (:policy :fast-safe)
 138   (:translate fdefn-makunbound)
 139   (:args (fdefn :scs (descriptor-reg) :target result))
 140   (:temporary (:scs (non-descriptor-reg)) temp)
 141   (:results (result :scs (descriptor-reg)))
 142   (:generator 38
 143     (storew null-tn fdefn fdefn-fun-slot other-pointer-lowtag)
 144     (inst lr temp  (make-fixup "undefined_tramp" :foreign))
 145     (storew temp fdefn fdefn-raw-addr-slot other-pointer-lowtag)
 146     (move result fdefn)))
 147
 148
 149 \f
 150 ;;;; Binding and Unbinding.
 151
 152 ;;; BIND -- Establish VAL as a binding for SYMBOL.  Save the old value and
 153 ;;; the symbol on the binding stack and stuff the new value into the
 154 ;;; symbol.
 155
 156 (define-vop (bind)
 157   (:args (val :scs (any-reg descriptor-reg))
 158          (symbol :scs (descriptor-reg)))
 159   (:temporary (:scs (descriptor-reg)) temp)
 160   (:generator 5
 161     (loadw temp symbol symbol-value-slot other-pointer-lowtag)
 162     (inst addi bsp-tn bsp-tn (* 2 n-word-bytes))
 163     (storew temp bsp-tn (- binding-value-slot binding-size))
 164     (storew symbol bsp-tn (- binding-symbol-slot binding-size))
 165     (storew val symbol symbol-value-slot other-pointer-lowtag)))
 166
 167
 168 (define-vop (unbind)
 169   (:temporary (:scs (descriptor-reg)) symbol value)
 170   (:generator 0
 171     (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 172     (loadw value bsp-tn (- binding-value-slot binding-size))
 173     (storew value symbol symbol-value-slot other-pointer-lowtag)
 174     (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 175     (storew zero-tn bsp-tn (- binding-value-slot binding-size))
 176     (inst subi bsp-tn bsp-tn (* 2 n-word-bytes))))
 177
 178
 179 (define-vop (unbind-to-here)
 180   (:args (arg :scs (descriptor-reg any-reg) :target where))
 181   (:temporary (:scs (any-reg) :from (:argument 0)) where)
 182   (:temporary (:scs (descriptor-reg)) symbol value)
 183   (:generator 0
 184     (let ((loop (gen-label))
 185           (skip (gen-label))
 186           (done (gen-label)))
 187       (move where arg)
 188       (inst cmpw where bsp-tn)
 189       (inst beq done)
 190
 191       (emit-label loop)
 192       (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 193       (inst cmpwi symbol 0)
 194       (inst beq skip)
 195       (loadw value bsp-tn (- binding-value-slot binding-size))
 196       (storew value symbol symbol-value-slot other-pointer-lowtag)
 197       (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 198
 199       (emit-label skip)
 200       (storew zero-tn bsp-tn (- binding-value-slot binding-size))
 201       (inst subi bsp-tn bsp-tn (* 2 n-word-bytes))
 202       (inst cmpw where bsp-tn)
 203       (inst bne loop)
 204
 205       (emit-label done))))
 206
 207
 208 \f
 209 ;;;; Closure indexing.
 210
 211 (define-vop (closure-index-ref word-index-ref)
 212   (:variant closure-info-offset fun-pointer-lowtag)
 213   (:translate %closure-index-ref))
 214
 215 (define-vop (funcallable-instance-info word-index-ref)
 216   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 217   (:translate %funcallable-instance-info))
 218
 219 (define-vop (set-funcallable-instance-info word-index-set)
 220   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 221   (:translate %set-funcallable-instance-info))
 222
 223 (define-vop (closure-ref slot-ref)
 224   (:variant closure-info-offset fun-pointer-lowtag))
 225
 226 (define-vop (closure-init slot-set)
 227   (:variant closure-info-offset fun-pointer-lowtag))
 228
 229 \f
 230 ;;;; Value Cell hackery.
 231
 232 (define-vop (value-cell-ref cell-ref)
 233   (:variant value-cell-value-slot other-pointer-lowtag))
 234
 235 (define-vop (value-cell-set cell-set)
 236   (:variant value-cell-value-slot other-pointer-lowtag))
 237
 238
 239 \f
 240 ;;;; Instance hackery:
 241
 242 (define-vop (instance-length)
 243   (:policy :fast-safe)
 244   (:translate %instance-length)
 245   (:args (struct :scs (descriptor-reg)))
 246   (:temporary (:scs (non-descriptor-reg)) temp)
 247   (:results (res :scs (unsigned-reg)))
 248   (:result-types positive-fixnum)
 249   (:generator 4
 250     (loadw temp struct 0 instance-pointer-lowtag)
 251     (inst srwi res temp n-widetag-bits)))
 252
 253 (define-vop (instance-index-ref word-index-ref)
 254   (:policy :fast-safe)
 255   (:translate %instance-ref)
 256   (:variant instance-slots-offset instance-pointer-lowtag)
 257   (:arg-types instance positive-fixnum))
 258
 259 (define-vop (instance-index-set word-index-set)
 260   (:policy :fast-safe)
 261   (:translate %instance-set)
 262   (:variant instance-slots-offset instance-pointer-lowtag)
 263   (:arg-types instance positive-fixnum *))
 264
 265
 266
 267 \f
 268 ;;;; Code object frobbing.
 269
 270 (define-vop (code-header-ref word-index-ref)
 271   (:translate code-header-ref)
 272   (:policy :fast-safe)
 273   (:variant 0 other-pointer-lowtag))
 274
 275 (define-vop (code-header-set word-index-set)
 276   (:translate code-header-set)
 277   (:policy :fast-safe)
 278   (:variant 0 other-pointer-lowtag))
 279
 280
 281 \f
 282 ;;;; raw instance slot accessors
 283
 284 (define-vop (raw-instance-ref/word)
 285   (:translate %raw-instance-ref/word)
 286   (:policy :fast-safe)
 287   (:args (object :scs (descriptor-reg))
 288          (index :scs (any-reg)))
 289   (:arg-types * positive-fixnum)
 290   (:results (value :scs (unsigned-reg)))
 291   (:temporary (:scs (non-descriptor-reg)) offset)
 292   (:result-types unsigned-num)
 293   (:generator 5
 294     (loadw offset object 0 instance-pointer-lowtag)
 295     ;; offset = (offset >> n-widetag-bits) << 2
 296     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 297     (inst subf offset index offset)
 298     (inst addi
 299           offset
 300           offset
 301           (- (* (1- instance-slots-offset) n-word-bytes)
 302              instance-pointer-lowtag))
 303     (inst lwzx value object offset)))
 304
 305 (define-vop (raw-instance-set/word)
 306   (:translate %raw-instance-set/word)
 307   (:policy :fast-safe)
 308   (:args (object :scs (descriptor-reg))
 309          (index :scs (any-reg))
 310          (value :scs (unsigned-reg)))
 311   (:arg-types * positive-fixnum unsigned-num)
 312   (:results (result :scs (unsigned-reg)))
 313   (:temporary (:scs (non-descriptor-reg)) offset)
 314   (:result-types unsigned-num)
 315   (:generator 5
 316     (loadw offset object 0 instance-pointer-lowtag)
 317     ;; offset = (offset >> n-widetag-bits) << 2
 318     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 319     (inst subf offset index offset)
 320     (inst addi
 321           offset
 322           offset
 323           (- (* (1- instance-slots-offset) n-word-bytes)
 324              instance-pointer-lowtag))
 325     (inst stwx value object offset)
 326     (move result value)))
 327
 328 (define-vop (raw-instance-ref/single)
 329   (:translate %raw-instance-ref/single)
 330   (:policy :fast-safe)
 331   (:args (object :scs (descriptor-reg))
 332          (index :scs (any-reg)))
 333   (:arg-types * positive-fixnum)
 334   (:results (value :scs (single-reg)))
 335   (:temporary (:scs (non-descriptor-reg)) offset)
 336   (:result-types single-float)
 337   (:generator 5
 338     (loadw offset object 0 instance-pointer-lowtag)
 339     ;; offset = (offset >> n-widetag-bits) << 2
 340     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 341     (inst subf offset index offset)
 342     (inst addi
 343           offset
 344           offset
 345           (- (* (1- instance-slots-offset) n-word-bytes)
 346              instance-pointer-lowtag))
 347     (inst lfsx value object offset)))
 348
 349 (define-vop (raw-instance-set/single)
 350   (:translate %raw-instance-set/single)
 351   (:policy :fast-safe)
 352   (:args (object :scs (descriptor-reg))
 353          (index :scs (any-reg))
 354          (value :scs (single-reg) :target result))
 355   (:arg-types * positive-fixnum single-float)
 356   (:results (result :scs (single-reg)))
 357   (:result-types single-float)
 358   (:temporary (:scs (non-descriptor-reg)) offset)
 359   (:generator 5
 360     (loadw offset object 0 instance-pointer-lowtag)
 361     ;; offset = (offset >> n-widetag-bits) << 2
 362     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 363     (inst subf offset index offset)
 364     (inst addi
 365           offset
 366           offset
 367           (- (* (1- instance-slots-offset) n-word-bytes)
 368              instance-pointer-lowtag))
 369     (inst stfsx value object offset)
 370     (unless (location= result value)
 371       (inst frsp result value))))
 372
 373 (define-vop (raw-instance-ref/double)
 374   (:translate %raw-instance-ref/double)
 375   (:policy :fast-safe)
 376   (:args (object :scs (descriptor-reg))
 377          (index :scs (any-reg)))
 378   (:arg-types * positive-fixnum)
 379   (:results (value :scs (double-reg)))
 380   (:temporary (:scs (non-descriptor-reg)) offset)
 381   (:result-types double-float)
 382   (:generator 5
 383     (loadw offset object 0 instance-pointer-lowtag)
 384     ;; offset = (offset >> n-widetag-bits) << 2
 385     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 386     (inst subf offset index offset)
 387     (inst addi
 388           offset
 389           offset
 390           (- (* (- instance-slots-offset 2) n-word-bytes)
 391              instance-pointer-lowtag))
 392     (inst lfdx value object offset)))
 393
 394 (define-vop (raw-instance-set/double)
 395   (:translate %raw-instance-set/double)
 396   (:policy :fast-safe)
 397   (:args (object :scs (descriptor-reg))
 398          (index :scs (any-reg))
 399          (value :scs (double-reg) :target result))
 400   (:arg-types * positive-fixnum double-float)
 401   (:results (result :scs (double-reg)))
 402   (:result-types double-float)
 403   (:temporary (:scs (non-descriptor-reg)) offset)
 404   (:generator 5
 405     (loadw offset object 0 instance-pointer-lowtag)
 406     ;; offset = (offset >> n-widetag-bits) << 2
 407     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 408     (inst subf offset index offset)
 409     (inst addi
 410           offset
 411           offset
 412           (- (* (- instance-slots-offset 2) n-word-bytes)
 413              instance-pointer-lowtag))
 414     (inst stfdx value object offset)
 415     (unless (location= result value)
 416       (inst fmr result value))))
 417
 418 (define-vop (raw-instance-ref/complex-single)
 419   (:translate %raw-instance-ref/complex-single)
 420   (:policy :fast-safe)
 421   (:args (object :scs (descriptor-reg))
 422          (index :scs (any-reg)))
 423   (:arg-types * positive-fixnum)
 424   (:results (value :scs (complex-single-reg)))
 425   (:temporary (:scs (non-descriptor-reg)) offset)
 426   (:result-types complex-single-float)
 427   (:generator 5
 428     (loadw offset object 0 instance-pointer-lowtag)
 429     ;; offset = (offset >> n-widetag-bits) << 2
 430     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 431     (inst subf offset index offset)
 432     (inst addi
 433           offset
 434           offset
 435           (- (* (- instance-slots-offset 2) n-word-bytes)
 436              instance-pointer-lowtag))
 437     (inst lfsx (complex-single-reg-real-tn value) object offset)
 438     (inst addi offset offset n-word-bytes)
 439     (inst lfsx (complex-single-reg-imag-tn value) object offset)))
 440
 441 (define-vop (raw-instance-set/complex-single)
 442   (:translate %raw-instance-set/complex-single)
 443   (:policy :fast-safe)
 444   (:args (object :scs (descriptor-reg))
 445          (index :scs (any-reg))
 446          (value :scs (complex-single-reg) :target result))
 447   (:arg-types * positive-fixnum complex-single-float)
 448   (:results (result :scs (complex-single-reg)))
 449   (:result-types complex-single-float)
 450   (:temporary (:scs (non-descriptor-reg)) offset)
 451   (:generator 5
 452     (loadw offset object 0 instance-pointer-lowtag)
 453     ;; offset = (offset >> n-widetag-bits) << 2
 454     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 455     (inst subf offset index offset)
 456     (inst addi
 457           offset
 458           offset
 459           (- (* (- instance-slots-offset 2) n-word-bytes)
 460              instance-pointer-lowtag))
 461     (let ((value-real (complex-single-reg-real-tn value))
 462           (result-real (complex-single-reg-real-tn result)))
 463       (inst stfsx value-real object offset)
 464       (unless (location= result-real value-real)
 465         (inst frsp result-real value-real)))
 466     (inst addi offset offset n-word-bytes)
 467     (let ((value-imag (complex-single-reg-imag-tn value))
 468           (result-imag (complex-single-reg-imag-tn result)))
 469       (inst stfsx value-imag object offset)
 470       (unless (location= result-imag value-imag)
 471         (inst frsp result-imag value-imag)))))
 472
 473 (define-vop (raw-instance-ref/complex-double)
 474   (:translate %raw-instance-ref/complex-double)
 475   (:policy :fast-safe)
 476   (:args (object :scs (descriptor-reg))
 477          (index :scs (any-reg)))
 478   (:arg-types * positive-fixnum)
 479   (:results (value :scs (complex-double-reg)))
 480   (:temporary (:scs (non-descriptor-reg)) offset)
 481   (:result-types complex-double-float)
 482   (:generator 5
 483     (loadw offset object 0 instance-pointer-lowtag)
 484     ;; offset = (offset >> n-widetag-bits) << 2
 485     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 486     (inst subf offset index offset)
 487     (inst addi
 488           offset
 489           offset
 490           (- (* (- instance-slots-offset 4) n-word-bytes)
 491              instance-pointer-lowtag))
 492     (inst lfdx (complex-double-reg-real-tn value) object offset)
 493     (inst addi offset offset (* 2 n-word-bytes))
 494     (inst lfdx (complex-double-reg-imag-tn value) object offset)))
 495
 496 (define-vop (raw-instance-set/complex-double)
 497   (:translate %raw-instance-set/complex-double)
 498   (:policy :fast-safe)
 499   (:args (object :scs (descriptor-reg))
 500          (index :scs (any-reg))
 501          (value :scs (complex-double-reg) :target result))
 502   (:arg-types * positive-fixnum complex-double-float)
 503   (:results (result :scs (complex-double-reg)))
 504   (:result-types complex-double-float)
 505   (:temporary (:scs (non-descriptor-reg)) offset)
 506   (:generator 5
 507     (loadw offset object 0 instance-pointer-lowtag)
 508     ;; offset = (offset >> n-widetag-bits) << 2
 509     (inst rlwinm offset offset (- 32 (- n-widetag-bits 2)) (- n-widetag-bits 2) 29)
 510     (inst subf offset index offset)
 511     (inst addi
 512           offset
 513           offset
 514           (- (* (- instance-slots-offset 4) n-word-bytes)
 515              instance-pointer-lowtag))
 516     (let ((value-real (complex-double-reg-real-tn value))
 517           (result-real (complex-double-reg-real-tn result)))
 518       (inst stfdx value-real object offset)
 519       (unless (location= result-real value-real)
 520         (inst fmr result-real value-real)))
 521     (inst addi offset offset (* 2 n-word-bytes))
 522     (let ((value-imag (complex-double-reg-imag-tn value))
 523           (result-imag (complex-double-reg-imag-tn result)))
 524       (inst stfdx value-imag object offset)
 525       (unless (location= result-imag value-imag)
 526         (inst fmr result-imag value-imag)))))