src/compiler/ppc/alloc.lisp

   1 ;;;; allocation VOPs
   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   (:info num)
  28   (:results (result :scs (descriptor-reg)))
  29   (:variant-vars star)
  30   (:policy :safe)
  31   (:node-var node)
  32   (:generator 0
  33     (cond ((zerop num)
  34            (move result null-tn))
  35           ((and star (= num 1))
  36            (move result (tn-ref-tn things)))
  37           (t
  38            (macrolet
  39                ((maybe-load (tn)
  40                   (once-only ((tn tn))
  41                     `(sc-case ,tn
  42                        ((any-reg descriptor-reg zero null)
  43                         ,tn)
  44                        (control-stack
  45                         (load-stack-tn temp ,tn)
  46                         temp)))))
  47              (let* ((dx-p (node-stack-allocate-p node))
  48                     (cons-cells (if star (1- num) num))
  49                     (alloc (* (pad-data-block cons-size) cons-cells)))
  50                (pseudo-atomic (pa-flag :extra (if dx-p 0 alloc))
  51                  (let ((allocation-area-tn (if dx-p csp-tn alloc-tn)))
  52                    (when dx-p
  53                      (align-csp res))
  54                    (inst clrrwi res allocation-area-tn n-lowtag-bits)
  55                    (inst ori res res list-pointer-lowtag)
  56                    (when dx-p
  57                      (inst addi csp-tn csp-tn alloc)))
  58                  (move ptr res)
  59                  (dotimes (i (1- cons-cells))
  60                    (storew (maybe-load (tn-ref-tn things)) ptr
  61                            cons-car-slot list-pointer-lowtag)
  62                    (setf things (tn-ref-across things))
  63                    (inst addi ptr ptr (pad-data-block cons-size))
  64                    (storew ptr ptr
  65                            (- cons-cdr-slot cons-size)
  66                            list-pointer-lowtag))
  67                  (storew (maybe-load (tn-ref-tn things)) ptr
  68                          cons-car-slot list-pointer-lowtag)
  69                  (storew (if star
  70                              (maybe-load (tn-ref-tn (tn-ref-across things)))
  71                              null-tn)
  72                          ptr cons-cdr-slot list-pointer-lowtag))
  73                (move result res)))))))
  74
  75 (define-vop (list list-or-list*)
  76   (:variant nil))
  77
  78 (define-vop (list* list-or-list*)
  79   (:variant t))
  80
  81 \f
  82 ;;;; Special purpose inline allocators.
  83
  84 (define-vop (allocate-code-object)
  85   (:args (boxed-arg :scs (any-reg))
  86          (unboxed-arg :scs (any-reg)))
  87   (:results (result :scs (descriptor-reg)))
  88   (:temporary (:scs (non-descriptor-reg)) ndescr)
  89   (:temporary (:scs (any-reg) :from (:argument 0)) boxed)
  90   (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) unboxed)
  91   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
  92   (:generator 100
  93     (inst addi boxed boxed-arg (fixnumize (1+ code-trace-table-offset-slot)))
  94     (inst clrrwi boxed boxed n-lowtag-bits)
  95     (inst srwi unboxed unboxed-arg word-shift)
  96     (inst addi unboxed unboxed lowtag-mask)
  97     (inst clrrwi unboxed unboxed n-lowtag-bits)
  98     (pseudo-atomic (pa-flag)
  99       ;; Note: we don't have to subtract off the 4 that was added by
 100       ;; pseudo-atomic, because oring in other-pointer-lowtag just adds
 101       ;; it right back.
 102       (inst ori result alloc-tn other-pointer-lowtag)
 103       (inst add alloc-tn alloc-tn boxed)
 104       (inst add alloc-tn alloc-tn unboxed)
 105       (inst slwi ndescr boxed (- n-widetag-bits word-shift))
 106       (inst ori ndescr ndescr code-header-widetag)
 107       (storew ndescr result 0 other-pointer-lowtag)
 108       (storew unboxed result code-code-size-slot other-pointer-lowtag)
 109       (storew null-tn result code-entry-points-slot other-pointer-lowtag)
 110       (storew null-tn result code-debug-info-slot other-pointer-lowtag))))
 111
 112 (define-vop (make-fdefn)
 113   (:args (name :scs (descriptor-reg) :to :eval))
 114   (:temporary (:scs (non-descriptor-reg)) temp)
 115   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 116   (:results (result :scs (descriptor-reg) :from :argument))
 117   (:policy :fast-safe)
 118   (:translate make-fdefn)
 119   (:generator 37
 120     (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size)
 121       (inst lr 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 (define-vop (make-closure)
 127   (:args (function :to :save :scs (descriptor-reg)))
 128   (:info length stack-allocate-p)
 129   (:temporary (:scs (non-descriptor-reg)) temp)
 130   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 131   (:results (result :scs (descriptor-reg)))
 132   (:generator 10
 133     (let* ((size (+ length closure-info-offset))
 134            (alloc-size (pad-data-block size))
 135            (allocation-area-tn (if stack-allocate-p csp-tn alloc-tn)))
 136       (pseudo-atomic (pa-flag :extra (if stack-allocate-p 0 alloc-size))
 137         (when stack-allocate-p
 138           (align-csp result))
 139         (inst clrrwi. result allocation-area-tn n-lowtag-bits)
 140         (when stack-allocate-p
 141           (inst addi csp-tn csp-tn alloc-size))
 142         (inst ori result result fun-pointer-lowtag)
 143         (inst lr temp (logior (ash (1- size) n-widetag-bits) closure-header-widetag))
 144         (storew temp result 0 fun-pointer-lowtag)))
 145     ;(inst lis temp (ash 18 10))
 146     ;(storew temp result closure-jump-insn-slot function-pointer-type)
 147     (storew function result closure-fun-slot fun-pointer-lowtag)))
 148
 149 ;;; The compiler likes to be able to directly make value cells.
 150 ;;;
 151 (define-vop (make-value-cell)
 152   (:args (value :to :save :scs (descriptor-reg any-reg)))
 153   (:temporary (:scs (non-descriptor-reg)) temp)
 154   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 155   (:results (result :scs (descriptor-reg)))
 156   (:generator 10
 157     (with-fixed-allocation (result pa-flag temp value-cell-header-widetag value-cell-size)
 158       (storew value result value-cell-value-slot other-pointer-lowtag))))
 159
 160
 161 \f
 162 ;;;; Automatic allocators for primitive objects.
 163
 164 (define-vop (make-unbound-marker)
 165   (:args)
 166   (:results (result :scs (any-reg)))
 167   (:generator 1
 168     (inst li result unbound-marker-widetag)))
 169
 170 (define-vop (fixed-alloc)
 171   (:args)
 172   (:info name words type lowtag)
 173   (:ignore name)
 174   (:results (result :scs (descriptor-reg)))
 175   (:temporary (:scs (non-descriptor-reg)) temp)
 176   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 177   (:generator 4
 178     (pseudo-atomic (pa-flag :extra (pad-data-block words))
 179       (cond ((logbitp 2 lowtag)
 180              (inst ori result alloc-tn lowtag))
 181             (t
 182              (inst clrrwi result alloc-tn n-lowtag-bits)
 183              (inst ori result  result lowtag)))
 184       (when type
 185         (inst lr temp (logior (ash (1- words) n-widetag-bits) type))
 186         (storew temp result 0 lowtag)))))
 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)
 193   (:results (result :scs (descriptor-reg)))
 194   (:temporary (:scs (any-reg)) bytes)
 195   (:temporary (:scs (non-descriptor-reg)) header)
 196   (:temporary (:sc non-descriptor-reg :offset nl3-offset) pa-flag)
 197   (:generator 6
 198     (inst addi bytes extra (* (1+ words) n-word-bytes))
 199     (inst slwi header bytes (- n-widetag-bits 2))
 200     (inst addi header header (+ (ash -2 n-widetag-bits) type))
 201     (inst clrrwi bytes bytes n-lowtag-bits)
 202     (pseudo-atomic (pa-flag)
 203       (cond ((logbitp 2 lowtag)
 204              (inst ori result alloc-tn lowtag))
 205             (t
 206              (inst clrrwi result alloc-tn n-lowtag-bits)
 207              (inst ori result result lowtag)))
 208       (storew header result 0 lowtag)
 209       (inst add alloc-tn alloc-tn bytes))))