src/compiler/mips/alloc.lisp

   1 ;;;; allocation VOPs for Mips
   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
  14 \f
  15 ;;;; LIST and LIST*
  16 (defoptimizer (list stack-allocate-result) ((&rest args))
  17   (not (null args)))
  18 (defoptimizer (list* stack-allocate-result) ((&rest args))
  19   (not (null (rest args))))
  20
  21 (define-vop (list-or-list*)
  22   (:args (things :more t))
  23   (:temporary (:scs (descriptor-reg) :type list) ptr)
  24   (:temporary (:scs (descriptor-reg)) temp)
  25   (:temporary (:scs (descriptor-reg) :type list :to (:result 0) :target result)
  26               res)
  27   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
  28   (:info num)
  29   (:results (result :scs (descriptor-reg)))
  30   (:variant-vars star)
  31   (:policy :safe)
  32   (:node-var node)
  33   (:generator 0
  34     (cond ((zerop num)
  35            (move result null-tn))
  36           ((and star (= num 1))
  37            (move result (tn-ref-tn things)))
  38           (t
  39            (macrolet
  40                ((store-car (tn list &optional (slot cons-car-slot))
  41                   `(let ((reg
  42                           (sc-case ,tn
  43                             ((any-reg descriptor-reg zero null)
  44                              ,tn)
  45                             (control-stack
  46                              (load-stack-tn temp ,tn)
  47                              temp))))
  48                      (storew reg ,list ,slot list-pointer-lowtag))))
  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 :extra (if dx-p 0 alloc))
  53                  (when dx-p
  54                    (align-csp res))
  55                  (inst srl res (if dx-p csp-tn alloc-tn) n-lowtag-bits)
  56                  (inst sll res n-lowtag-bits)
  57                  (inst or res list-pointer-lowtag)
  58                  (when dx-p
  59                    (inst addu csp-tn alloc))
  60                  (move ptr res)
  61                  (dotimes (i (1- cons-cells))
  62                    (store-car (tn-ref-tn things) ptr)
  63                    (setf things (tn-ref-across things))
  64                    (inst addu ptr ptr (pad-data-block cons-size))
  65                    (storew ptr ptr
  66                            (- cons-cdr-slot cons-size)
  67                            list-pointer-lowtag))
  68                  (store-car (tn-ref-tn things) ptr)
  69                  (cond (star
  70                         (setf things (tn-ref-across things))
  71                         (store-car (tn-ref-tn things) ptr cons-cdr-slot))
  72                        (t
  73                         (storew null-tn ptr
  74                                 cons-cdr-slot list-pointer-lowtag)))
  75                  (aver (null (tn-ref-across things)))
  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 (any-reg) :from (:argument 0)) boxed)
  93   (:temporary (:scs (non-descriptor-reg) :from (:argument 1)) unboxed)
  94   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
  95   (:generator 100
  96     (inst li ndescr (lognot lowtag-mask))
  97     (inst addu boxed boxed-arg
  98           (fixnumize (1+ code-trace-table-offset-slot)))
  99     (inst and boxed ndescr)
 100     (inst srl unboxed unboxed-arg word-shift)
 101     (inst addu unboxed unboxed lowtag-mask)
 102     (inst and unboxed ndescr)
 103     (inst sll ndescr boxed (- n-widetag-bits word-shift))
 104     (inst or ndescr code-header-widetag)
 105
 106     (pseudo-atomic (pa-flag)
 107       (inst or result alloc-tn other-pointer-lowtag)
 108       (inst addu alloc-tn boxed)
 109       (storew ndescr result 0 other-pointer-lowtag)
 110       (storew unboxed result code-code-size-slot other-pointer-lowtag)
 111       (inst addu alloc-tn unboxed)
 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   (:policy :fast-safe)
 117   (:translate make-fdefn)
 118   (:args (name :scs (descriptor-reg) :to :eval))
 119   (:temporary (:scs (non-descriptor-reg)) temp)
 120   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 121   (:results (result :scs (descriptor-reg) :from :argument))
 122   (:generator 37
 123     (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size)
 124       (inst li 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 nl4-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 :extra (if stack-allocate-p 0 alloc-size))
 139         (cond (stack-allocate-p
 140                (align-csp result)
 141                (inst srl result csp-tn n-lowtag-bits)
 142                (inst addu csp-tn alloc-size))
 143               (t
 144                (inst srl result alloc-tn n-lowtag-bits)))
 145         (inst sll result n-lowtag-bits)
 146         (inst or result fun-pointer-lowtag)
 147         (inst li temp (logior (ash (1- size) n-widetag-bits)
 148                               closure-header-widetag))
 149         (storew temp result 0 fun-pointer-lowtag))
 150       (storew function result closure-fun-slot fun-pointer-lowtag))))
 151
 152 ;;; The compiler likes to be able to directly make value cells.
 153 (define-vop (make-value-cell)
 154   (:args (value :to :save :scs (descriptor-reg any-reg null zero)))
 155   (:temporary (:scs (non-descriptor-reg)) temp)
 156   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 157   (:info stack-allocate-p)
 158   (:ignore stack-allocate-p)
 159   (:results (result :scs (descriptor-reg)))
 160   (:generator 10
 161     (with-fixed-allocation (result pa-flag temp value-cell-header-widetag value-cell-size)
 162       (storew value result value-cell-value-slot other-pointer-lowtag))))
 163
 164 \f
 165 ;;;; Automatic allocators for primitive objects.
 166
 167 (define-vop (make-unbound-marker)
 168   (:args)
 169   (:results (result :scs (any-reg)))
 170   (:generator 1
 171     (inst li result unbound-marker-widetag)))
 172
 173 (define-vop (make-funcallable-instance-tramp)
 174   (:args)
 175   (:results (result :scs (any-reg)))
 176   (:generator 1
 177     (inst li result (make-fixup "funcallable_instance_tramp" :foreign))))
 178
 179 (define-vop (fixed-alloc)
 180   (:args)
 181   (:info name words type lowtag)
 182   (:ignore name)
 183   (:results (result :scs (descriptor-reg)))
 184   (:temporary (:scs (non-descriptor-reg)) temp)
 185   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 186   (:generator 4
 187     (pseudo-atomic (pa-flag :extra (pad-data-block words))
 188       (inst or result alloc-tn lowtag)
 189       (when type
 190         (inst li temp (logior (ash (1- words) n-widetag-bits) type))
 191         (storew temp result 0 lowtag)))))
 192
 193 (define-vop (var-alloc)
 194   (:args (extra :scs (any-reg)))
 195   (:arg-types positive-fixnum)
 196   (:info name words type lowtag)
 197   (:ignore name)
 198   (:results (result :scs (descriptor-reg)))
 199   (:temporary (:scs (any-reg)) bytes)
 200   (:temporary (:scs (non-descriptor-reg)) header)
 201   (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
 202   (:generator 6
 203     (inst addu bytes extra (* (1+ words) n-word-bytes))
 204     (inst sll header bytes (- n-widetag-bits 2))
 205     (inst addu header header (+ (ash -2 n-widetag-bits) type))
 206     (inst srl bytes bytes n-lowtag-bits)
 207     (inst sll bytes bytes n-lowtag-bits)
 208     (pseudo-atomic (pa-flag)
 209       (inst or result alloc-tn lowtag)
 210       (storew header result 0 lowtag)
 211       (inst addu alloc-tn alloc-tn bytes))))
 212