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 (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   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
  27   (:temporary (:scs (non-descriptor-reg)) alloc-temp)
  28   (:info num)
  29   (:results (result :scs (descriptor-reg)))
  30   (:variant-vars star)
  31   (:policy :safe)
  32   (:node-var node)
  33   #!-gencgc (:ignore alloc-temp)
  34   (:generator 0
  35     (cond ((zerop num)
  36            (move result null-tn))
  37           ((and star (= num 1))
  38            (move result (tn-ref-tn things)))
  39           (t
  40            (macrolet
  41                ((maybe-load (tn)
  42                   (once-only ((tn tn))
  43                     `(sc-case ,tn
  44                        ((any-reg descriptor-reg zero null)
  45                         ,tn)
  46                        (control-stack
  47                         (load-stack-tn temp ,tn)
  48                         temp)))))
  49              (let* ((dx-p (node-stack-allocate-p node))
  50                     (cons-cells (if star (1- num) num))
  51                     (alloc (* (pad-data-block cons-size) cons-cells)))
  52                (pseudo-atomic (pa-flag)
  53                  (if dx-p
  54                      (progn
  55                        (align-csp res)
  56                        (inst clrrwi res csp-tn n-lowtag-bits)
  57                        (inst ori res res list-pointer-lowtag)
  58                        (inst addi csp-tn csp-tn alloc))
  59                      (allocation res alloc list-pointer-lowtag :temp-tn alloc-temp
  60                                  :flag-tn pa-flag))
  61                  (move ptr res)
  62                  (dotimes (i (1- cons-cells))
  63                    (storew (maybe-load (tn-ref-tn things)) ptr
  64                            cons-car-slot list-pointer-lowtag)
  65                    (setf things (tn-ref-across things))
  66                    (inst addi ptr ptr (pad-data-block cons-size))
  67                    (storew ptr ptr
  68                            (- cons-cdr-slot cons-size)
  69                            list-pointer-lowtag))
  70                  (storew (maybe-load (tn-ref-tn things)) ptr
  71                          cons-car-slot list-pointer-lowtag)
  72                  (storew (if star
  73                              (maybe-load (tn-ref-tn (tn-ref-across things)))
  74                              null-tn)
  75                          ptr cons-cdr-slot list-pointer-lowtag))
  76                (move result res)))))))
  77
  78 (define-vop (list list-or-list*)
  79   (:variant nil))
  80
  81 (define-vop (list* list-or-list*)
  82   (:variant t))
  83
  84 \f
  85 ;;;; Special purpose inline allocators.
  86
  87 (define-vop (allocate-code-object)
  88   (:args (boxed-arg :scs (any-reg))
  89          (unboxed-arg :scs (any-reg)))
  90   (:results (result :scs (descriptor-reg)))
  91   (:temporary (:scs (non-descriptor-reg)) ndescr)
  92   (:temporary (:scs (non-descriptor-reg)) size)
  93   (:temporary (:scs (any-reg) :from (:argument 0)) boxed)
  94   (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) unboxed)
  95   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
  96   (:generator 100
  97     (inst addi boxed boxed-arg (fixnumize (1+ code-trace-table-offset-slot)))
  98     (inst clrrwi boxed boxed n-lowtag-bits)
  99     (inst srwi unboxed unboxed-arg word-shift)
 100     (inst addi unboxed unboxed lowtag-mask)
 101     (inst clrrwi unboxed unboxed n-lowtag-bits)
 102     (pseudo-atomic (pa-flag)
 103       ;; Note: we don't have to subtract off the 4 that was added by
 104       ;; pseudo-atomic, because oring in other-pointer-lowtag just adds
 105       ;; it right back.
 106       (inst add size boxed unboxed)
 107       (allocation result size other-pointer-lowtag :temp-tn ndescr :flag-tn pa-flag)
 108       (inst slwi ndescr boxed (- n-widetag-bits word-shift))
 109       (inst ori ndescr ndescr code-header-widetag)
 110       (storew ndescr result 0 other-pointer-lowtag)
 111       (storew unboxed result code-code-size-slot other-pointer-lowtag)
 112       (storew null-tn result code-entry-points-slot other-pointer-lowtag)
 113       (storew null-tn result code-debug-info-slot other-pointer-lowtag))))
 114
 115 (define-vop (make-fdefn)
 116   (:args (name :scs (descriptor-reg) :to :eval))
 117   (:temporary (:scs (non-descriptor-reg)) temp)
 118   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 119   (:results (result :scs (descriptor-reg) :from :argument))
 120   (:policy :fast-safe)
 121   (:translate make-fdefn)
 122   (:generator 37
 123     (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size)
 124       (inst lr temp  (make-fixup "undefined_tramp" :foreign))
 125       (storew name result fdefn-name-slot other-pointer-lowtag)
 126       (storew null-tn result fdefn-fun-slot other-pointer-lowtag)
 127       (storew temp result fdefn-raw-addr-slot other-pointer-lowtag))))
 128
 129 (define-vop (make-closure)
 130   (:args (function :to :save :scs (descriptor-reg)))
 131   (:info length stack-allocate-p)
 132   (:temporary (:scs (non-descriptor-reg)) temp)
 133   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 134   (:results (result :scs (descriptor-reg)))
 135   (:generator 10
 136     (let* ((size (+ length closure-info-offset))
 137            (alloc-size (pad-data-block size)))
 138       (pseudo-atomic (pa-flag)
 139         (if stack-allocate-p
 140             (progn
 141               (align-csp result)
 142               (inst clrrwi. result csp-tn n-lowtag-bits)
 143               (inst addi csp-tn csp-tn alloc-size)
 144               (inst ori result result fun-pointer-lowtag)
 145               (inst lr temp (logior (ash (1- size) n-widetag-bits) closure-header-widetag)))
 146             (progn
 147               (allocation result (pad-data-block size)
 148                           fun-pointer-lowtag :temp-tn temp :flag-tn pa-flag)
 149               (inst lr temp (logior (ash (1- size) n-widetag-bits) closure-header-widetag))))
 150         ;;; should this be closure-fun-slot instead of 0?
 151         (storew temp result 0 fun-pointer-lowtag)
 152         (storew function result closure-fun-slot fun-pointer-lowtag)))))
 153
 154 ;;; The compiler likes to be able to directly make value cells.
 155 ;;;
 156 (define-vop (make-value-cell)
 157   (:args (value :to :save :scs (descriptor-reg any-reg)))
 158   (:temporary (:scs (non-descriptor-reg)) temp)
 159   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 160   (:info stack-allocate-p)
 161   (:ignore stack-allocate-p)
 162   (:results (result :scs (descriptor-reg)))
 163   (:generator 10
 164     (with-fixed-allocation (result pa-flag temp value-cell-header-widetag value-cell-size)
 165       (storew value result value-cell-value-slot other-pointer-lowtag))))
 166
 167
 168 \f
 169 ;;;; Automatic allocators for primitive objects.
 170
 171 (define-vop (make-unbound-marker)
 172   (:args)
 173   (:results (result :scs (any-reg)))
 174   (:generator 1
 175     (inst li result unbound-marker-widetag)))
 176
 177 (define-vop (make-funcallable-instance-tramp)
 178   (:args)
 179   (:results (result :scs (any-reg)))
 180   (:generator 1
 181     (inst lr result (make-fixup "funcallable_instance_tramp" :foreign))))
 182
 183 (define-vop (fixed-alloc)
 184   (:args)
 185   (:info name words type lowtag)
 186   (:ignore name)
 187   (:results (result :scs (descriptor-reg)))
 188   (:temporary (:scs (non-descriptor-reg)) temp)
 189   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 190   (:generator 4
 191     (with-fixed-allocation (result pa-flag temp type words :lowtag lowtag)
 192       )))
 193
 194 (define-vop (var-alloc)
 195   (:args (extra :scs (any-reg)))
 196   (:arg-types positive-fixnum)
 197   (:info name words type lowtag)
 198   (:ignore name #!-gencgc temp)
 199   (:results (result :scs (descriptor-reg)))
 200   (:temporary (:scs (any-reg)) bytes)
 201   (:temporary (:scs (non-descriptor-reg)) header)
 202   (:temporary (:scs (non-descriptor-reg)) temp)
 203   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 204   (:generator 6
 205     (inst addi bytes extra (* (1+ words) n-word-bytes))
 206     (inst slwi header bytes (- n-widetag-bits 2))
 207     (inst addi header header (+ (ash -2 n-widetag-bits) type))
 208     (inst clrrwi bytes bytes n-lowtag-bits)
 209     (pseudo-atomic (pa-flag)
 210       (allocation result bytes lowtag :temp-tn temp :flag-tn pa-flag)
 211       (storew header result 0 lowtag))))