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