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 (1- n-lowtag-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     (inst subi bsp-tn bsp-tn (* 2 n-word-bytes))))
 176
 177
 178 (define-vop (unbind-to-here)
 179   (:args (arg :scs (descriptor-reg any-reg) :target where))
 180   (:temporary (:scs (any-reg) :from (:argument 0)) where)
 181   (:temporary (:scs (descriptor-reg)) symbol value)
 182   (:generator 0
 183     (let ((loop (gen-label))
 184           (skip (gen-label))
 185           (done (gen-label)))
 186       (move where arg)
 187       (inst cmpw where bsp-tn)
 188       (inst beq done)
 189
 190       (emit-label loop)
 191       (loadw symbol bsp-tn (- binding-symbol-slot binding-size))
 192       (inst cmpwi symbol 0)
 193       (inst beq skip)
 194       (loadw value bsp-tn (- binding-value-slot binding-size))
 195       (storew value symbol symbol-value-slot other-pointer-lowtag)
 196       (storew zero-tn bsp-tn (- binding-symbol-slot binding-size))
 197
 198       (emit-label skip)
 199       (inst subi bsp-tn bsp-tn (* 2 n-word-bytes))
 200       (inst cmpw where bsp-tn)
 201       (inst bne loop)
 202
 203       (emit-label done))))
 204
 205
 206 \f
 207 ;;;; Closure indexing.
 208
 209 (define-vop (closure-index-ref word-index-ref)
 210   (:variant closure-info-offset fun-pointer-lowtag)
 211   (:translate %closure-index-ref))
 212
 213 (define-vop (funcallable-instance-info word-index-ref)
 214   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 215   (:translate %funcallable-instance-info))
 216
 217 (define-vop (set-funcallable-instance-info word-index-set)
 218   (:variant funcallable-instance-info-offset fun-pointer-lowtag)
 219   (:translate %set-funcallable-instance-info))
 220
 221 (define-vop (funcallable-instance-lexenv cell-ref)
 222   (:variant funcallable-instance-lexenv-slot fun-pointer-lowtag))
 223
 224
 225 (define-vop (closure-ref slot-ref)
 226   (:variant closure-info-offset fun-pointer-lowtag))
 227
 228 (define-vop (closure-init slot-set)
 229   (:variant closure-info-offset fun-pointer-lowtag))
 230
 231 \f
 232 ;;;; Value Cell hackery.
 233
 234 (define-vop (value-cell-ref cell-ref)
 235   (:variant value-cell-value-slot other-pointer-lowtag))
 236
 237 (define-vop (value-cell-set cell-set)
 238   (:variant value-cell-value-slot other-pointer-lowtag))
 239
 240
 241 \f
 242 ;;;; Instance hackery:
 243
 244 (define-vop (instance-length)
 245   (:policy :fast-safe)
 246   (:translate %instance-length)
 247   (:args (struct :scs (descriptor-reg)))
 248   (:temporary (:scs (non-descriptor-reg)) temp)
 249   (:results (res :scs (unsigned-reg)))
 250   (:result-types positive-fixnum)
 251   (:generator 4
 252     (loadw temp struct 0 instance-pointer-lowtag)
 253     (inst srwi res temp n-widetag-bits)))
 254
 255 (define-vop (instance-ref slot-ref)
 256   (:variant instance-slots-offset instance-pointer-lowtag)
 257   (:policy :fast-safe)
 258   (:translate %instance-ref)
 259   (:arg-types * (:constant index)))
 260
 261 #+nil
 262 (define-vop (instance-set slot-set)
 263   (:policy :fast-safe)
 264   (:translate %instance-set)
 265   (:variant instance-slots-offset instance-pointer-lowtag)
 266   (:arg-types instance (:constant index) *))
 267
 268 (define-vop (instance-index-ref word-index-ref)
 269   (:policy :fast-safe)
 270   (:translate %instance-ref)
 271   (:variant instance-slots-offset instance-pointer-lowtag)
 272   (:arg-types instance positive-fixnum))
 273
 274 (define-vop (instance-index-set word-index-set)
 275   (:policy :fast-safe)
 276   (:translate %instance-set)
 277   (:variant instance-slots-offset instance-pointer-lowtag)
 278   (:arg-types instance positive-fixnum *))
 279
 280
 281
 282 \f
 283 ;;;; Code object frobbing.
 284
 285 (define-vop (code-header-ref word-index-ref)
 286   (:translate code-header-ref)
 287   (:policy :fast-safe)
 288   (:variant 0 other-pointer-lowtag))
 289
 290 (define-vop (code-header-set word-index-set)
 291   (:translate code-header-set)
 292   (:policy :fast-safe)
 293   (:variant 0 other-pointer-lowtag))
 294
 295
 296 \f
 297 ;;;; raw instance slot accessors
 298
 299 (define-vop (raw-instance-ref/word)
 300   (:translate %raw-instance-ref/word)
 301   (:policy :fast-safe)
 302   (:args (object :scs (descriptor-reg))
 303          (index :scs (any-reg)))
 304   (:arg-types * positive-fixnum)
 305   (:results (value :scs (unsigned-reg)))
 306   (:temporary (:scs (non-descriptor-reg)) offset)
 307   (:result-types unsigned-num)
 308   (:generator 5
 309     (loadw offset object 0 instance-pointer-lowtag)
 310     (inst srwi offset offset n-widetag-bits)
 311     (inst slwi offset offset 2)
 312     (inst subf offset index offset)
 313     (inst addi
 314           offset
 315           offset
 316           (- (* (1- instance-slots-offset) n-word-bytes)
 317              instance-pointer-lowtag))
 318     (inst lwzx value object offset)))
 319
 320 (define-vop (raw-instance-set/word)
 321   (:translate %raw-instance-set/word)
 322   (:policy :fast-safe)
 323   (:args (object :scs (descriptor-reg))
 324          (index :scs (any-reg))
 325          (value :scs (unsigned-reg)))
 326   (:arg-types * positive-fixnum unsigned-num)
 327   (:results (result :scs (unsigned-reg)))
 328   (:temporary (:scs (non-descriptor-reg)) offset)
 329   (:result-types unsigned-num)
 330   (:generator 5
 331     (loadw offset object 0 instance-pointer-lowtag)
 332     (inst srwi offset offset n-widetag-bits)
 333     (inst slwi offset offset 2)
 334     (inst subf offset index offset)
 335     (inst addi
 336           offset
 337           offset
 338           (- (* (1- instance-slots-offset) n-word-bytes)
 339              instance-pointer-lowtag))
 340     (inst stwx value object offset)
 341     (move result value)))
 342
 343 (define-vop (raw-instance-ref/single)
 344   (:translate %raw-instance-ref/single)
 345   (:policy :fast-safe)
 346   (:args (object :scs (descriptor-reg))
 347          (index :scs (any-reg)))
 348   (:arg-types * positive-fixnum)
 349   (:results (value :scs (single-reg)))
 350   (:temporary (:scs (non-descriptor-reg)) offset)
 351   (:result-types single-float)
 352   (:generator 5
 353     (loadw offset object 0 instance-pointer-lowtag)
 354     (inst srwi offset offset n-widetag-bits)
 355     (inst slwi offset offset 2)
 356     (inst subf offset index offset)
 357     (inst addi
 358           offset
 359           offset
 360           (- (* (1- instance-slots-offset) n-word-bytes)
 361              instance-pointer-lowtag))
 362     (inst lfsx value object offset)))
 363
 364 (define-vop (raw-instance-set/single)
 365   (:translate %raw-instance-set/single)
 366   (:policy :fast-safe)
 367   (:args (object :scs (descriptor-reg))
 368          (index :scs (any-reg))
 369          (value :scs (single-reg) :target result))
 370   (:arg-types * positive-fixnum single-float)
 371   (:results (result :scs (single-reg)))
 372   (:result-types single-float)
 373   (:temporary (:scs (non-descriptor-reg)) offset)
 374   (:generator 5
 375     (loadw offset object 0 instance-pointer-lowtag)
 376     (inst srwi offset offset n-widetag-bits)
 377     (inst slwi offset offset 2)
 378     (inst subf offset index offset)
 379     (inst addi
 380           offset
 381           offset
 382           (- (* (1- instance-slots-offset) n-word-bytes)
 383              instance-pointer-lowtag))
 384     (inst stfsx value object offset)
 385     (unless (location= result value)
 386       (inst frsp result value))))
 387
 388 (define-vop (raw-instance-ref/double)
 389   (:translate %raw-instance-ref/double)
 390   (:policy :fast-safe)
 391   (:args (object :scs (descriptor-reg))
 392          (index :scs (any-reg)))
 393   (:arg-types * positive-fixnum)
 394   (:results (value :scs (double-reg)))
 395   (:temporary (:scs (non-descriptor-reg)) offset)
 396   (:result-types double-float)
 397   (:generator 5
 398     (loadw offset object 0 instance-pointer-lowtag)
 399     (inst srwi offset offset n-widetag-bits)
 400     (inst slwi offset offset 2)
 401     (inst subf offset index offset)
 402     (inst addi
 403           offset
 404           offset
 405           (- (* (- instance-slots-offset 2) n-word-bytes)
 406              instance-pointer-lowtag))
 407     (inst lfdx value object offset)))
 408
 409 (define-vop (raw-instance-set/double)
 410   (:translate %raw-instance-set/double)
 411   (:policy :fast-safe)
 412   (:args (object :scs (descriptor-reg))
 413          (index :scs (any-reg))
 414          (value :scs (double-reg) :target result))
 415   (:arg-types * positive-fixnum double-float)
 416   (:results (result :scs (double-reg)))
 417   (:result-types double-float)
 418   (:temporary (:scs (non-descriptor-reg)) offset)
 419   (:generator 5
 420     (loadw offset object 0 instance-pointer-lowtag)
 421     (inst srwi offset offset n-widetag-bits)
 422     (inst slwi offset offset 2)
 423     (inst subf offset index offset)
 424     (inst addi
 425           offset
 426           offset
 427           (- (* (- instance-slots-offset 2) n-word-bytes)
 428              instance-pointer-lowtag))
 429     (inst stfdx value object offset)
 430     (unless (location= result value)
 431       (inst fmr result value))))
 432
 433 (define-vop (raw-instance-ref/complex-single)
 434   (:translate %raw-instance-ref/complex-single)
 435   (:policy :fast-safe)
 436   (:args (object :scs (descriptor-reg))
 437          (index :scs (any-reg)))
 438   (:arg-types * positive-fixnum)
 439   (:results (value :scs (complex-single-reg)))
 440   (:temporary (:scs (non-descriptor-reg)) offset)
 441   (:result-types complex-single-float)
 442   (:generator 5
 443     (loadw offset object 0 instance-pointer-lowtag)
 444     (inst srwi offset offset n-widetag-bits)
 445     (inst slwi offset offset 2)
 446     (inst subf offset index offset)
 447     (inst addi
 448           offset
 449           offset
 450           (- (* (- instance-slots-offset 2) n-word-bytes)
 451              instance-pointer-lowtag))
 452     (inst lfsx (complex-single-reg-real-tn value) object offset)
 453     (inst addi offset offset n-word-bytes)
 454     (inst lfsx (complex-single-reg-imag-tn value) object offset)))
 455
 456 (define-vop (raw-instance-set/complex-single)
 457   (:translate %raw-instance-set/complex-single)
 458   (:policy :fast-safe)
 459   (:args (object :scs (descriptor-reg))
 460          (index :scs (any-reg))
 461          (value :scs (complex-single-reg) :target result))
 462   (:arg-types * positive-fixnum complex-single-float)
 463   (:results (result :scs (complex-single-reg)))
 464   (:result-types complex-single-float)
 465   (:temporary (:scs (non-descriptor-reg)) offset)
 466   (:generator 5
 467     (loadw offset object 0 instance-pointer-lowtag)
 468     (inst srwi offset offset n-widetag-bits)
 469     (inst slwi offset offset 2)
 470     (inst subf offset index offset)
 471     (inst addi
 472           offset
 473           offset
 474           (- (* (- instance-slots-offset 2) n-word-bytes)
 475              instance-pointer-lowtag))
 476     (let ((value-real (complex-single-reg-real-tn value))
 477           (result-real (complex-single-reg-real-tn result)))
 478       (inst stfsx value-real object offset)
 479       (unless (location= result-real value-real)
 480         (inst frsp result-real value-real)))
 481     (inst addi offset offset n-word-bytes)
 482     (let ((value-imag (complex-single-reg-imag-tn value))
 483           (result-imag (complex-single-reg-imag-tn result)))
 484       (inst stfsx value-imag object offset)
 485       (unless (location= result-imag value-imag)
 486         (inst frsp result-imag value-imag)))))
 487
 488 (define-vop (raw-instance-ref/complex-double)
 489   (:translate %raw-instance-ref/complex-double)
 490   (:policy :fast-safe)
 491   (:args (object :scs (descriptor-reg))
 492          (index :scs (any-reg)))
 493   (:arg-types * positive-fixnum)
 494   (:results (value :scs (complex-double-reg)))
 495   (:temporary (:scs (non-descriptor-reg)) offset)
 496   (:result-types complex-double-float)
 497   (:generator 5
 498     (loadw offset object 0 instance-pointer-lowtag)
 499     (inst srwi offset offset n-widetag-bits)
 500     (inst slwi offset offset 2)
 501     (inst subf offset index offset)
 502     (inst addi
 503           offset
 504           offset
 505           (- (* (- instance-slots-offset 4) n-word-bytes)
 506              instance-pointer-lowtag))
 507     (inst lfdx (complex-double-reg-real-tn value) object offset)
 508     (inst addi offset offset (* 2 n-word-bytes))
 509     (inst lfdx (complex-double-reg-imag-tn value) object offset)))
 510
 511 (define-vop (raw-instance-set/complex-double)
 512   (:translate %raw-instance-set/complex-double)
 513   (:policy :fast-safe)
 514   (:args (object :scs (descriptor-reg))
 515          (index :scs (any-reg))
 516          (value :scs (complex-double-reg) :target result))
 517   (:arg-types * positive-fixnum complex-double-float)
 518   (:results (result :scs (complex-double-reg)))
 519   (:result-types complex-double-float)
 520   (:temporary (:scs (non-descriptor-reg)) offset)
 521   (:generator 5
 522     (loadw offset object 0 instance-pointer-lowtag)
 523     (inst srwi offset offset n-widetag-bits)
 524     (inst slwi offset offset 2)
 525     (inst subf offset index offset)
 526     (inst addi
 527           offset
 528           offset
 529           (- (* (- instance-slots-offset 4) n-word-bytes)
 530              instance-pointer-lowtag))
 531     (let ((value-real (complex-double-reg-real-tn value))
 532           (result-real (complex-double-reg-real-tn result)))
 533       (inst stfdx value-real object offset)
 534       (unless (location= result-real value-real)
 535         (inst fmr result-real value-real)))
 536     (inst addi offset offset (* 2 n-word-bytes))
 537     (let ((value-imag (complex-double-reg-imag-tn value))
 538           (result-imag (complex-double-reg-imag-tn result)))
 539       (inst stfdx value-imag object offset)
 540       (unless (location= result-imag value-imag)
 541         (inst fmr result-imag value-imag)))))