src/compiler/sparc/alloc.lisp

   1 ;;;; allocation VOPs for the Sparc port
   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 \f
  14 ;;;; LIST and LIST*
  15 (defoptimizer (list stack-allocate-result) ((&rest args))
  16   (not (null args)))
  17 (defoptimizer (list* stack-allocate-result) ((&rest args))
  18   (not (null (rest args))))
  19
  20 (define-vop (list-or-list*)
  21   (:args (things :more t))
  22   (:temporary (:scs (descriptor-reg) :type list) ptr)
  23   (:temporary (:scs (descriptor-reg)) temp)
  24   (:temporary (:scs (descriptor-reg) :type list :to (:result 0) :target result)
  25               res)
  26   (:info num)
  27   (:results (result :scs (descriptor-reg)))
  28   (:variant-vars star)
  29   (:policy :safe)
  30   (:node-var node)
  31   (:generator 0
  32     (cond ((zerop num)
  33            (move result null-tn))
  34           ((and star (= num 1))
  35            (move result (tn-ref-tn things)))
  36           (t
  37            (macrolet
  38                ((maybe-load (tn)
  39                   (once-only ((tn tn))
  40                     `(sc-case ,tn
  41                        ((any-reg descriptor-reg zero null)
  42                         ,tn)
  43                        (control-stack
  44                         (load-stack-tn temp ,tn)
  45                         temp)))))
  46              (let* ((dx-p (node-stack-allocate-p node))
  47                     (cons-cells (if star (1- num) num))
  48                     (alloc (* (pad-data-block cons-size) cons-cells)))
  49                (pseudo-atomic (:extra (if dx-p 0 alloc))
  50                  (let ((allocation-area-tn (if dx-p csp-tn alloc-tn)))
  51                    (when dx-p
  52                      (align-csp res))
  53                    (inst andn res allocation-area-tn lowtag-mask)
  54                    (inst or res list-pointer-lowtag)
  55                    (when dx-p
  56                      (inst add csp-tn csp-tn alloc)))
  57                  (move ptr res)
  58                  (dotimes (i (1- cons-cells))
  59                    (storew (maybe-load (tn-ref-tn things)) ptr
  60                            cons-car-slot list-pointer-lowtag)
  61                    (setf things (tn-ref-across things))
  62                    (inst add ptr ptr (pad-data-block cons-size))
  63                    (storew ptr ptr
  64                            (- cons-cdr-slot cons-size)
  65                            list-pointer-lowtag))
  66                  (storew (maybe-load (tn-ref-tn things)) ptr
  67                          cons-car-slot list-pointer-lowtag)
  68                  (storew (if star
  69                              (maybe-load (tn-ref-tn (tn-ref-across things)))
  70                              null-tn)
  71                          ptr cons-cdr-slot list-pointer-lowtag))
  72                (move result res)))))))
  73
  74 (define-vop (list list-or-list*)
  75   (:variant nil))
  76
  77 (define-vop (list* list-or-list*)
  78   (:variant t))
  79
  80 \f
  81 ;;;; Special purpose inline allocators.
  82
  83 (define-vop (allocate-code-object)
  84   (:args (boxed-arg :scs (any-reg))
  85          (unboxed-arg :scs (any-reg)))
  86   (:results (result :scs (descriptor-reg)))
  87   (:temporary (:scs (non-descriptor-reg)) ndescr)
  88   (:temporary (:scs (any-reg) :from (:argument 0)) boxed)
  89   (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) unboxed)
  90   (:generator 100
  91     (inst add boxed boxed-arg (fixnumize (1+ code-trace-table-offset-slot)))
  92     (inst and boxed (lognot lowtag-mask))
  93     (inst srl unboxed unboxed-arg word-shift)
  94     (inst add unboxed lowtag-mask)
  95     (inst and unboxed (lognot lowtag-mask))
  96     (pseudo-atomic ()
  97       ;; CMUCL Comment:
  98       ;; Note: we don't have to subtract off the 4 that was added by
  99       ;; pseudo-atomic, because oring in other-pointer-lowtag just adds
 100       ;; it right back.
 101       ;;
 102       ;; This looks like another dreadful type pun. CSR - 2002-02-06
 103       (inst or result alloc-tn other-pointer-lowtag)
 104       (inst add alloc-tn boxed)
 105       (inst add alloc-tn unboxed)
 106       (inst sll ndescr boxed (- n-widetag-bits word-shift))
 107       (inst or ndescr code-header-widetag)
 108       (storew ndescr result 0 other-pointer-lowtag)
 109       (storew unboxed result code-code-size-slot other-pointer-lowtag)
 110       (storew null-tn result code-entry-points-slot other-pointer-lowtag)
 111       (storew null-tn result code-debug-info-slot other-pointer-lowtag))))
 112
 113 (define-vop (make-fdefn)
 114   (:args (name :scs (descriptor-reg) :to :eval))
 115   (:temporary (:scs (non-descriptor-reg)) temp)
 116   (:results (result :scs (descriptor-reg) :from :argument))
 117   (:policy :fast-safe)
 118   (:translate make-fdefn)
 119   (:generator 37
 120     (with-fixed-allocation (result temp fdefn-widetag fdefn-size)
 121       (inst li temp (make-fixup "undefined_tramp" :foreign))
 122       (storew name result fdefn-name-slot other-pointer-lowtag)
 123       (storew null-tn result fdefn-fun-slot other-pointer-lowtag)
 124       (storew temp result fdefn-raw-addr-slot other-pointer-lowtag))))
 125
 126
 127 (define-vop (make-closure)
 128   (:args (function :to :save :scs (descriptor-reg)))
 129   (:info length stack-allocate-p)
 130   (:temporary (:scs (non-descriptor-reg)) temp)
 131   (:results (result :scs (descriptor-reg)))
 132   (:generator 10
 133     (let* ((size (+ length closure-info-offset))
 134            (alloc-size (pad-data-block size)))
 135       (pseudo-atomic (:extra (if stack-allocate-p 0 alloc-size))
 136         (cond (stack-allocate-p
 137                (align-csp temp)
 138                (inst andn result csp-tn lowtag-mask)
 139                (inst or result fun-pointer-lowtag)
 140                (inst add csp-tn alloc-size))
 141               (t
 142                (inst andn result alloc-tn lowtag-mask)
 143                (inst or result fun-pointer-lowtag)))
 144         (inst li temp (logior (ash (1- size) n-widetag-bits) closure-header-widetag))
 145         (storew temp result 0 fun-pointer-lowtag)
 146         (storew function result closure-fun-slot fun-pointer-lowtag)))))
 147
 148 ;;; The compiler likes to be able to directly make value cells.
 149 (define-vop (make-value-cell)
 150   (:args (value :to :save :scs (descriptor-reg any-reg)))
 151   (:temporary (:scs (non-descriptor-reg)) temp)
 152   (:info stack-allocate-p)
 153   (:ignore stack-allocate-p)
 154   (:results (result :scs (descriptor-reg)))
 155   (:generator 10
 156     (with-fixed-allocation
 157         (result temp value-cell-header-widetag value-cell-size)
 158       (storew value result value-cell-value-slot other-pointer-lowtag))))
 159 \f
 160 ;;;; Automatic allocators for primitive objects.
 161
 162 (define-vop (make-unbound-marker)
 163   (:args)
 164   (:results (result :scs (any-reg)))
 165   (:generator 1
 166     (inst li result unbound-marker-widetag)))
 167
 168 (define-vop (make-funcallable-instance-tramp)
 169   (:args)
 170   (:results (result :scs (any-reg)))
 171   (:generator 1
 172     (inst li result (make-fixup "funcallable_instance_tramp" :foreign))))
 173
 174 (define-vop (fixed-alloc)
 175   (:args)
 176   (:info name words type lowtag stack-allocate-p)
 177   (:ignore name stack-allocate-p)
 178   (:results (result :scs (descriptor-reg)))
 179   (:temporary (:scs (non-descriptor-reg)) temp)
 180   (:generator 4
 181     (pseudo-atomic (:extra (pad-data-block words))
 182       (cond ((logbitp (1- n-lowtag-bits) lowtag)
 183              (inst or result alloc-tn lowtag))
 184             (t
 185              (inst andn result alloc-tn lowtag-mask)
 186              (inst or result lowtag)))
 187       (when type
 188         (inst li temp (logior (ash (1- words) n-widetag-bits) type))
 189         (storew temp result 0 lowtag)))))
 190
 191 (define-vop (var-alloc)
 192   (:args (extra :scs (any-reg)))
 193   (:arg-types positive-fixnum)
 194   (:info name words type lowtag)
 195   (:ignore name)
 196   (:results (result :scs (descriptor-reg)))
 197   (:temporary (:scs (any-reg)) bytes)
 198   (:temporary (:scs (non-descriptor-reg)) header)
 199   (:generator 6
 200     (inst add bytes extra (* (1+ words) n-word-bytes))
 201     (inst sll header bytes (- n-widetag-bits 2))
 202     (inst add header header (+ (ash -2 n-widetag-bits) type))
 203     (inst and bytes (lognot lowtag-mask))
 204     (pseudo-atomic ()
 205       ;; Need to be careful if the lowtag and the pseudo-atomic flag
 206       ;; are not compatible.
 207       (cond ((logbitp (1- n-lowtag-bits) lowtag)
 208              (inst or result alloc-tn lowtag))
 209             (t
 210              (inst andn result alloc-tn lowtag-mask)
 211              (inst or result lowtag)))
 212       (storew header result 0 lowtag)
 213       (inst add alloc-tn alloc-tn bytes))))