src/compiler/hppa/alloc.lisp

   1 ;;;; allocation VOPs for the HPPA
   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   (:info num)
  22   (:results (result :scs (descriptor-reg)))
  23   (:variant-vars star)
  24   (:policy :safe)
  25   (:node-var node)
  26   (:generator 0
  27     (cond ((zerop num)
  28            (move null-tn result))
  29           ((and star (= num 1))
  30            (move (tn-ref-tn things) result))
  31           (t
  32            (macrolet
  33              ((store-car (tn list &optional (slot cons-car-slot))
  34                 `(let ((reg (sc-case ,tn
  35                               ((any-reg descriptor-reg zero null) ,tn)
  36                               (control-stack
  37                                 (load-stack-tn temp ,tn)
  38                                 temp))))
  39                    (storew reg ,list ,slot list-pointer-lowtag))))
  40              (let* ((dx-p (node-stack-allocate-p node))
  41                     (cons-cells (if star (1- num) num))
  42                     (alloc (* (pad-data-block cons-size) cons-cells)))
  43                (pseudo-atomic (:extra (if dx-p 0 alloc))
  44                  (when dx-p
  45                    (align-csp res))
  46                  (set-lowtag list-pointer-lowtag (if dx-p csp-tn alloc-tn) res)
  47                  (when dx-p
  48                    (if (typep alloc '(signed-byte 14))
  49                        (inst ldo alloc csp-tn csp-tn)
  50                        ;; FIXME: We have TEMP available, so can do an
  51                        ;; LIDL / LDO / ADD sequence here instead of
  52                        ;; punting.
  53                        (error "VOP LIST-OR-LIST* can't stack-allocate more than 511 CONSes at once")))
  54                  (move res ptr)
  55                  (dotimes (i (1- cons-cells))
  56                    (store-car (tn-ref-tn things) ptr)
  57                    (setf things (tn-ref-across things))
  58                    (inst addi (pad-data-block cons-size) ptr ptr)
  59                    (storew ptr ptr
  60                            (- cons-cdr-slot cons-size)
  61                            list-pointer-lowtag))
  62                  (store-car (tn-ref-tn things) ptr)
  63                  (cond (star
  64                         (setf things (tn-ref-across things))
  65                         (store-car (tn-ref-tn things) ptr cons-cdr-slot))
  66                        (t
  67                         (storew null-tn ptr
  68                                 cons-cdr-slot list-pointer-lowtag)))
  69                  (aver (null (tn-ref-across things)))
  70                  (move res result))))))))
  71
  72 (define-vop (list list-or-list*)
  73   (:variant nil))
  74
  75 (define-vop (list* list-or-list*)
  76   (:variant t))
  77
  78 \f
  79 ;;;; Special purpose inline allocators.
  80 ;;; ALLOCATE-VECTOR
  81 (define-vop (allocate-vector-on-heap)
  82   (:args (type :scs (unsigned-reg))
  83          (length :scs (any-reg))
  84          (words :scs (any-reg)))
  85   (:arg-types positive-fixnum
  86               positive-fixnum
  87               positive-fixnum)
  88   (:temporary (:sc non-descriptor-reg) bytes)
  89   (:results (result :scs (descriptor-reg) :from :load))
  90   #!-stack-allocatable-vectors
  91   (:translate allocate-vector)
  92   (:policy :fast-safe)
  93   (:generator 100
  94     (inst addi (+ lowtag-mask
  95                   (* vector-data-offset n-word-bytes)) words bytes)
  96     (inst dep 0 31 n-lowtag-bits bytes)
  97     (pseudo-atomic ()
  98       (set-lowtag other-pointer-lowtag alloc-tn result)
  99       (inst add bytes alloc-tn alloc-tn)
 100       (storew type result 0 other-pointer-lowtag)
 101       (storew length result vector-length-slot other-pointer-lowtag))))
 102
 103 (define-vop (allocate-vector-on-stack)
 104   (:args (type :scs (unsigned-reg))
 105          (length :scs (any-reg))
 106          (words :scs (any-reg)))
 107   (:arg-types positive-fixnum
 108               positive-fixnum
 109               positive-fixnum)
 110   (:temporary (:sc non-descriptor-reg) bytes temp)
 111   (:results (result :scs (descriptor-reg) :from :load))
 112   (:policy :fast-safe)
 113   (:generator 100
 114     (inst addi (+ lowtag-mask
 115                   (* vector-data-offset n-word-bytes)) words bytes)
 116     (inst dep 0 31 n-lowtag-bits bytes)
 117     ;; FIXME: It would be good to check for stack overflow here.
 118     (pseudo-atomic ()
 119       (align-csp temp)
 120       (set-lowtag other-pointer-lowtag csp-tn result)
 121       (inst addi (* vector-data-offset n-word-bytes) csp-tn temp)
 122       (inst add bytes csp-tn csp-tn)
 123       (storew type result 0 other-pointer-lowtag)
 124       (storew length result vector-length-slot other-pointer-lowtag)
 125       (let ((loop (gen-label)))
 126         (emit-label loop)
 127         (inst comb :<> temp csp-tn loop :nullify t)
 128         (inst stwm zero-tn n-word-bytes temp)))))
 129
 130 (define-vop (allocate-code-object)
 131   (:args (boxed-arg :scs (any-reg))
 132          (unboxed-arg :scs (any-reg)))
 133   (:results (result :scs (descriptor-reg)))
 134   (:temporary (:scs (non-descriptor-reg)) ndescr)
 135   (:temporary (:scs (any-reg) :from (:argument 0)) boxed)
 136   (:temporary (:scs (non-descriptor-reg)) unboxed)
 137   (:generator 100
 138     (inst addi (fixnumize (1+ code-constants-offset)) boxed-arg boxed)
 139     (inst dep 0 31 n-lowtag-bits boxed)
 140     (inst srl unboxed-arg word-shift unboxed)
 141     (inst addi lowtag-mask unboxed unboxed)
 142     (inst dep 0 31 n-lowtag-bits unboxed)
 143     (inst sll boxed (- n-widetag-bits word-shift) ndescr)
 144     (inst addi code-header-widetag ndescr ndescr)
 145     (pseudo-atomic ()
 146       (set-lowtag other-pointer-lowtag alloc-tn result)
 147       (inst add alloc-tn boxed alloc-tn)
 148       (inst add alloc-tn unboxed alloc-tn)
 149       (storew ndescr result 0 other-pointer-lowtag)
 150       (storew unboxed-arg result code-code-size-slot other-pointer-lowtag)
 151       (storew null-tn result code-debug-info-slot other-pointer-lowtag))))
 152
 153 (define-vop (make-fdefn)
 154   (:translate make-fdefn)
 155   (:policy :fast-safe)
 156   (:args (name :scs (descriptor-reg) :to :eval))
 157   (:temporary (:scs (non-descriptor-reg)) temp)
 158   (:results (result :scs (descriptor-reg) :from :argument))
 159   (:generator 37
 160     (with-fixed-allocation (result nil temp fdefn-widetag fdefn-size nil)
 161       (inst li (make-fixup 'undefined-tramp :assembly-routine) temp)
 162       (storew name result fdefn-name-slot other-pointer-lowtag)
 163       (storew null-tn result fdefn-fun-slot other-pointer-lowtag)
 164       (storew temp result fdefn-raw-addr-slot other-pointer-lowtag))))
 165
 166 (define-vop (make-closure)
 167   (:args (function :to :save :scs (descriptor-reg)))
 168   (:info length stack-allocate-p)
 169   (:temporary (:scs (non-descriptor-reg)) temp)
 170   (:results (result :scs (descriptor-reg)))
 171   (:generator 10
 172     (with-fixed-allocation
 173         (result nil temp closure-header-widetag
 174          (+ length closure-info-offset)
 175          stack-allocate-p :lowtag fun-pointer-lowtag)
 176       (storew function result closure-fun-slot fun-pointer-lowtag))))
 177
 178 ;;; The compiler likes to be able to directly make value cells.
 179 (define-vop (make-value-cell)
 180   (:args (value :to :save :scs (descriptor-reg any-reg)))
 181   (:temporary (:scs (non-descriptor-reg)) temp)
 182   (:results (result :scs (descriptor-reg)))
 183   (:info stack-allocate-p)
 184   (:generator 10
 185     (with-fixed-allocation
 186         (result nil temp value-cell-header-widetag value-cell-size stack-allocate-p)
 187       (storew value result value-cell-value-slot other-pointer-lowtag))))
 188 \f
 189 ;;;; Automatic allocators for primitive objects.
 190
 191 (define-vop (make-unbound-marker)
 192   (:args)
 193   (:results (result :scs (descriptor-reg any-reg)))
 194   (:generator 1
 195     (inst li unbound-marker-widetag result)))
 196
 197 (define-vop (make-funcallable-instance-tramp)
 198   (:args)
 199   (:results (result :scs (any-reg)))
 200   (:generator 1
 201     (inst li (make-fixup 'funcallable-instance-tramp :assembly-routine)
 202           result)))
 203
 204 (define-vop (fixed-alloc)
 205   (:args)
 206   (:info name words type lowtag stack-allocate-p)
 207   (:ignore name)
 208   (:results (result :scs (descriptor-reg)))
 209   (:temporary (:scs (non-descriptor-reg)) temp)
 210   (:generator 4
 211     (with-fixed-allocation
 212       (result nil temp type words stack-allocate-p
 213        :lowtag lowtag :maybe-write t))))
 214
 215 (define-vop (var-alloc)
 216   (:args (extra :scs (any-reg)))
 217   (:arg-types positive-fixnum)
 218   (:info name words type lowtag)
 219   (:ignore name)
 220   (:results (result :scs (descriptor-reg)))
 221   (:temporary (:scs (any-reg)) bytes)
 222   (:temporary (:scs (non-descriptor-reg)) header)
 223   (:generator 6
 224     (inst addi (* (1+ words) n-word-bytes) extra bytes)
 225     (inst sll bytes (- n-widetag-bits 2) header)
 226     (inst addi (+ (ash -2 n-widetag-bits) type) header header)
 227     (inst dep 0 31 n-lowtag-bits bytes)
 228     (pseudo-atomic ()
 229       (set-lowtag lowtag alloc-tn result)
 230       (storew header result 0 lowtag)
 231       (inst add alloc-tn bytes alloc-tn))))
 232