src/compiler/mips/alloc.lisp

   1 (in-package "SB!VM")
   2
   3 \f
   4 ;;;; LIST and LIST*
   5
   6 (define-vop (list-or-list*)
   7   (:args (things :more t))
   8   (:temporary (:scs (descriptor-reg) :type list) ptr)
   9   (:temporary (:scs (descriptor-reg)) temp)
  10   (:temporary (:scs (descriptor-reg) :type list :to (:result 0) :target result)
  11               res)
  12   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
  13   (:info num)
  14   (:results (result :scs (descriptor-reg)))
  15   (:variant-vars star)
  16   (:policy :safe)
  17   (:generator 0
  18     (cond ((zerop num)
  19            (move result null-tn))
  20           ((and star (= num 1))
  21            (move result (tn-ref-tn things)))
  22           (t
  23            (macrolet
  24                ((store-car (tn list &optional (slot cons-car-slot))
  25                   `(let ((reg
  26                           (sc-case ,tn
  27                             ((any-reg descriptor-reg) ,tn)
  28                             (zero zero-tn)
  29                             (null null-tn)
  30                             (control-stack
  31                              (load-stack-tn temp ,tn)
  32                              temp))))
  33                      (storew reg ,list ,slot list-pointer-lowtag))))
  34              (let ((cons-cells (if star (1- num) num)))
  35                (pseudo-atomic (pa-flag
  36                                :extra (* (pad-data-block cons-size)
  37                                          cons-cells))
  38                  (inst or res alloc-tn list-pointer-lowtag)
  39                  (move ptr res)
  40                  (dotimes (i (1- cons-cells))
  41                    (store-car (tn-ref-tn things) ptr)
  42                    (setf things (tn-ref-across things))
  43                    (inst addu ptr ptr (pad-data-block cons-size))
  44                    (storew ptr ptr
  45                            (- cons-cdr-slot cons-size)
  46                            list-pointer-lowtag))
  47                  (store-car (tn-ref-tn things) ptr)
  48                  (cond (star
  49                         (setf things (tn-ref-across things))
  50                         (store-car (tn-ref-tn things) ptr cons-cdr-slot))
  51                        (t
  52                         (storew null-tn ptr
  53                                 cons-cdr-slot list-pointer-lowtag)))
  54                  (assert (null (tn-ref-across things)))
  55                  (move result res))))))))
  56
  57 (define-vop (list list-or-list*)
  58   (:variant nil))
  59
  60 (define-vop (list* list-or-list*)
  61   (:variant t))
  62
  63 \f
  64 ;;;; Special purpose inline allocators.
  65
  66 (define-vop (allocate-code-object)
  67   (:args (boxed-arg :scs (any-reg))
  68          (unboxed-arg :scs (any-reg)))
  69   (:results (result :scs (descriptor-reg)))
  70   (:temporary (:scs (non-descriptor-reg)) ndescr)
  71   (:temporary (:scs (any-reg) :from (:argument 0)) boxed)
  72   (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) unboxed)
  73   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
  74   (:generator 100
  75     (inst li ndescr (lognot lowtag-mask))
  76     (inst addu boxed boxed-arg
  77           (fixnumize (1+ code-trace-table-offset-slot)))
  78     (inst and boxed ndescr)
  79     (inst srl unboxed unboxed-arg word-shift)
  80     (inst addu unboxed unboxed lowtag-mask)
  81     (inst and unboxed ndescr)
  82     (inst sll ndescr boxed (- n-widetag-bits word-shift))
  83     (inst or ndescr code-header-widetag)
  84
  85     (pseudo-atomic (pa-flag)
  86       (inst or result alloc-tn other-pointer-lowtag)
  87       (storew ndescr result 0 other-pointer-lowtag)
  88       (storew unboxed result code-code-size-slot other-pointer-lowtag)
  89       (storew null-tn result code-entry-points-slot other-pointer-lowtag)
  90       (inst addu alloc-tn boxed)
  91       (inst addu alloc-tn unboxed))
  92
  93     (storew null-tn result code-debug-info-slot other-pointer-lowtag)))
  94
  95 (define-vop (make-fdefn)
  96   (:policy :fast-safe)
  97   (:translate make-fdefn)
  98   (:args (name :scs (descriptor-reg) :to :eval))
  99   (:temporary (:scs (non-descriptor-reg)) temp)
 100   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 101   (:results (result :scs (descriptor-reg) :from :argument))
 102   (:generator 37
 103     (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size)
 104       (storew name result fdefn-name-slot other-pointer-lowtag)
 105       (storew null-tn result fdefn-fun-slot other-pointer-lowtag)
 106       (inst li temp (make-fixup "undefined_tramp" :foreign))
 107       (storew temp result fdefn-raw-addr-slot other-pointer-lowtag))))
 108
 109 (define-vop (make-closure)
 110   (:args (function :to :save :scs (descriptor-reg)))
 111   (:info length)
 112   (:temporary (:scs (non-descriptor-reg)) temp)
 113   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 114   (:results (result :scs (descriptor-reg)))
 115   (:generator 10
 116     (let ((size (+ length closure-info-offset)))
 117       (inst li temp (logior (ash (1- size) n-widetag-bits) closure-header-widetag))
 118       (pseudo-atomic (pa-flag :extra (pad-data-block size))
 119         (inst or result alloc-tn fun-pointer-lowtag)
 120         (storew temp result 0 fun-pointer-lowtag))
 121       (storew function result closure-fun-slot fun-pointer-lowtag))))
 122
 123 ;;; The compiler likes to be able to directly make value cells.
 124 ;;;
 125 (define-vop (make-value-cell)
 126   (:args (value :to :save :scs (descriptor-reg any-reg null zero)))
 127   (:temporary (:scs (non-descriptor-reg)) temp)
 128   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 129   (:results (result :scs (descriptor-reg)))
 130   (:generator 10
 131     (with-fixed-allocation
 132         (result pa-flag temp value-cell-header-widetag value-cell-size))
 133     (storew value result value-cell-value-slot other-pointer-lowtag)))
 134
 135 \f
 136 ;;;; Automatic allocators for primitive objects.
 137
 138 (define-vop (make-unbound-marker)
 139   (:args)
 140   (:results (result :scs (any-reg)))
 141   (:generator 1
 142     (inst li result unbound-marker-widetag)))
 143
 144 (define-vop (fixed-alloc)
 145   (:args)
 146   (:info name words type lowtag)
 147   (:ignore name)
 148   (:results (result :scs (descriptor-reg)))
 149   (:temporary (:scs (non-descriptor-reg)) temp)
 150   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 151   (:generator 4
 152     (pseudo-atomic (pa-flag :extra (pad-data-block words))
 153       (inst or result alloc-tn lowtag)
 154       (when type
 155         (inst li temp (logior (ash (1- words) n-widetag-bits) type))
 156         (storew temp result 0 lowtag)))))
 157
 158 (define-vop (var-alloc)
 159   (:args (extra :scs (any-reg)))
 160   (:arg-types positive-fixnum)
 161   (:info name words type lowtag)
 162   (:ignore name)
 163   (:results (result :scs (descriptor-reg)))
 164   (:temporary (:scs (any-reg)) bytes)
 165   (:temporary (:scs (non-descriptor-reg)) header)
 166   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 167   (:generator 6
 168     (inst addu bytes extra (* (1+ words) n-word-bytes))
 169     (inst sll header bytes (- n-widetag-bits 2))
 170     (inst addu header header (+ (ash -2 n-widetag-bits) type))
 171     (inst srl bytes bytes n-lowtag-bits)
 172     (inst sll bytes bytes n-lowtag-bits)
 173     (pseudo-atomic (pa-flag)
 174       (inst or result alloc-tn lowtag)
 175       (storew header result 0 lowtag)
 176       (inst addu alloc-tn alloc-tn bytes))))
 177