src/compiler/ppc/alloc.lisp

   1 ;;;; allocation VOPs for the PPC
   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   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
  22   (:temporary (:scs (non-descriptor-reg)) alloc-temp)
  23   (:info num)
  24   (:results (result :scs (descriptor-reg)))
  25   (:variant-vars star)
  26   (:policy :safe)
  27   (:node-var node)
  28   #!-gencgc (:ignore alloc-temp)
  29   (:generator 0
  30     (cond ((zerop num)
  31            (move result null-tn))
  32           ((and star (= num 1))
  33            (move result (tn-ref-tn things)))
  34           (t
  35            (macrolet
  36                ((maybe-load (tn)
  37                   (once-only ((tn tn))
  38                     `(sc-case ,tn
  39                        ((any-reg descriptor-reg zero null)
  40                         ,tn)
  41                        (control-stack
  42                         (load-stack-tn temp ,tn)
  43                         temp)))))
  44              (let* ((dx-p (node-stack-allocate-p node))
  45                     (cons-cells (if star (1- num) num))
  46                     (alloc (* (pad-data-block cons-size) cons-cells)))
  47                (pseudo-atomic (pa-flag)
  48                  (if dx-p
  49                      (progn
  50                        (align-csp res)
  51                        (inst clrrwi res csp-tn n-lowtag-bits)
  52                        (inst ori res res list-pointer-lowtag)
  53                        (inst addi csp-tn csp-tn alloc))
  54                      (allocation res alloc list-pointer-lowtag :temp-tn alloc-temp
  55                                  :flag-tn pa-flag))
  56                  (move ptr res)
  57                  (dotimes (i (1- cons-cells))
  58                    (storew (maybe-load (tn-ref-tn things)) ptr
  59                            cons-car-slot list-pointer-lowtag)
  60                    (setf things (tn-ref-across things))
  61                    (inst addi ptr ptr (pad-data-block cons-size))
  62                    (storew ptr ptr
  63                            (- cons-cdr-slot cons-size)
  64                            list-pointer-lowtag))
  65                  (storew (maybe-load (tn-ref-tn things)) ptr
  66                          cons-car-slot list-pointer-lowtag)
  67                  (storew (if star
  68                              (maybe-load (tn-ref-tn (tn-ref-across things)))
  69                              null-tn)
  70                          ptr cons-cdr-slot list-pointer-lowtag))
  71                (move result res)))))))
  72
  73 (define-vop (list list-or-list*)
  74   (:variant nil))
  75
  76 (define-vop (list* list-or-list*)
  77   (:variant t))
  78
  79 \f
  80 ;;;; Special purpose inline allocators.
  81
  82 (define-vop (allocate-code-object)
  83   (:args (boxed-arg :scs (any-reg))
  84          (unboxed-arg :scs (any-reg)))
  85   (:results (result :scs (descriptor-reg)))
  86   (:temporary (:scs (non-descriptor-reg)) ndescr)
  87   (:temporary (:scs (non-descriptor-reg)) size)
  88   (:temporary (:scs (any-reg) :from (:argument 0)) boxed)
  89   (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) unboxed)
  90   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
  91   (:generator 100
  92     (inst addi boxed boxed-arg (fixnumize (1+ code-trace-table-offset-slot)))
  93     (inst clrrwi boxed boxed n-lowtag-bits)
  94     (inst srwi unboxed unboxed-arg word-shift)
  95     (inst addi unboxed unboxed lowtag-mask)
  96     (inst clrrwi unboxed unboxed n-lowtag-bits)
  97     (pseudo-atomic (pa-flag)
  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       (inst add size boxed unboxed)
 102       (allocation result size other-pointer-lowtag :temp-tn ndescr :flag-tn pa-flag)
 103       (inst slwi ndescr boxed (- n-widetag-bits word-shift))
 104       (inst ori ndescr ndescr code-header-widetag)
 105       (storew ndescr result 0 other-pointer-lowtag)
 106       (storew unboxed result code-code-size-slot other-pointer-lowtag)
 107       (storew null-tn result code-entry-points-slot other-pointer-lowtag)
 108       (storew null-tn result code-debug-info-slot other-pointer-lowtag))))
 109
 110 (define-vop (make-fdefn)
 111   (:args (name :scs (descriptor-reg) :to :eval))
 112   (:temporary (:scs (non-descriptor-reg)) temp)
 113   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 114   (:results (result :scs (descriptor-reg) :from :argument))
 115   (:policy :fast-safe)
 116   (:translate make-fdefn)
 117   (:generator 37
 118     (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size)
 119       (inst lr temp  (make-fixup "undefined_tramp" :foreign))
 120       (storew name result fdefn-name-slot other-pointer-lowtag)
 121       (storew null-tn result fdefn-fun-slot other-pointer-lowtag)
 122       (storew temp result fdefn-raw-addr-slot other-pointer-lowtag))))
 123
 124 (define-vop (make-closure)
 125   (:args (function :to :save :scs (descriptor-reg)))
 126   (:info length stack-allocate-p)
 127   (:temporary (:scs (non-descriptor-reg)) temp)
 128   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 129   (:results (result :scs (descriptor-reg)))
 130   (:generator 10
 131     (let* ((size (+ length closure-info-offset))
 132            (alloc-size (pad-data-block size)))
 133       (pseudo-atomic (pa-flag)
 134         (if stack-allocate-p
 135             (progn
 136               (align-csp result)
 137               (inst clrrwi. result csp-tn n-lowtag-bits)
 138               (inst addi csp-tn csp-tn alloc-size)
 139               (inst ori result result fun-pointer-lowtag)
 140               (inst lr temp (logior (ash (1- size) n-widetag-bits) closure-header-widetag)))
 141             (progn
 142               (allocation result (pad-data-block size)
 143                           fun-pointer-lowtag :temp-tn temp :flag-tn pa-flag)
 144               (inst lr 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 ;;;
 150 (define-vop (make-value-cell)
 151   (:args (value :to :save :scs (descriptor-reg any-reg)))
 152   (:temporary (:scs (non-descriptor-reg)) temp)
 153   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 154   (:info stack-allocate-p)
 155   (:ignore stack-allocate-p)
 156   (:results (result :scs (descriptor-reg)))
 157   (:generator 10
 158     (with-fixed-allocation (result pa-flag temp value-cell-header-widetag value-cell-size)
 159       (storew value result value-cell-value-slot other-pointer-lowtag))))
 160
 161
 162 \f
 163 ;;;; Automatic allocators for primitive objects.
 164
 165 (define-vop (make-unbound-marker)
 166   (:args)
 167   (:results (result :scs (any-reg)))
 168   (:generator 1
 169     (inst li result unbound-marker-widetag)))
 170
 171 (define-vop (make-funcallable-instance-tramp)
 172   (:args)
 173   (:results (result :scs (any-reg)))
 174   (:generator 1
 175     (inst lr result (make-fixup "funcallable_instance_tramp" :foreign))))
 176
 177 (define-vop (fixed-alloc)
 178   (:args)
 179   (:info name words type lowtag stack-allocate-p)
 180   (:ignore name stack-allocate-p)
 181   (:results (result :scs (descriptor-reg)))
 182   (:temporary (:scs (non-descriptor-reg)) temp)
 183   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 184   (:generator 4
 185     (with-fixed-allocation (result pa-flag temp type words :lowtag lowtag)
 186       )))
 187
 188 (define-vop (var-alloc)
 189   (:args (extra :scs (any-reg)))
 190   (:arg-types positive-fixnum)
 191   (:info name words type lowtag)
 192   (:ignore name #!-gencgc temp)
 193   (:results (result :scs (descriptor-reg)))
 194   (:temporary (:scs (any-reg)) bytes)
 195   (:temporary (:scs (non-descriptor-reg)) header)
 196   (:temporary (:scs (non-descriptor-reg)) temp)
 197   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 198   (:generator 6
 199     (inst addi bytes extra (* (1+ words) n-word-bytes))
 200     (inst slwi header bytes (- n-widetag-bits 2))
 201     (inst addi header header (+ (ash -2 n-widetag-bits) type))
 202     (inst clrrwi bytes bytes n-lowtag-bits)
 203     (pseudo-atomic (pa-flag)
 204       (allocation result bytes lowtag :temp-tn temp :flag-tn pa-flag)
 205       (storew header result 0 lowtag))))