1 ;;;; allocation VOPs for the x86-64
3 ;;;; This software is part of the SBCL system. See the README file for
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.
14 ;;;; CONS, LIST and LIST*
15 (define-vop (list-or-list*)
16 (:args (things :more t))
17 (:temporary (:sc unsigned-reg) ptr temp)
18 (:temporary (:sc unsigned-reg :to (:result 0) :target result) res)
20 (:results (result :scs (descriptor-reg)))
26 ;; (move result nil-value)
27 (inst mov result nil-value))
29 (move result (tn-ref-tn things)))
32 ((store-car (tn list &optional (slot cons-car-slot))
35 ((any-reg descriptor-reg) ,tn)
39 (storew reg ,list ,slot list-pointer-lowtag))))
40 (let ((cons-cells (if star (1- num) num))
41 (stack-allocate-p (awhen (sb!c::node-lvar node)
42 (sb!c::lvar-dynamic-extent it))))
43 (maybe-pseudo-atomic stack-allocate-p
44 (allocation res (* (pad-data-block cons-size) cons-cells) node
45 stack-allocate-p list-pointer-lowtag)
47 (dotimes (i (1- cons-cells))
48 (store-car (tn-ref-tn things) ptr)
49 (setf things (tn-ref-across things))
50 (inst add ptr (pad-data-block cons-size))
51 (storew ptr ptr (- cons-cdr-slot cons-size)
53 (store-car (tn-ref-tn things) ptr)
55 (setf things (tn-ref-across things))
56 (store-car (tn-ref-tn things) ptr cons-cdr-slot))
58 (storew nil-value ptr cons-cdr-slot
59 list-pointer-lowtag)))
60 (aver (null (tn-ref-across things)))))
61 (move result res))))))
63 (define-vop (list list-or-list*)
66 (define-vop (list* list-or-list*)
69 ;;;; special-purpose inline allocators
72 (define-vop (allocate-vector-on-heap)
73 (:args (type :scs (unsigned-reg))
74 (length :scs (any-reg))
75 (words :scs (any-reg)))
76 (:results (result :scs (descriptor-reg) :from :load))
77 (:arg-types positive-fixnum
82 (inst lea result (make-ea :byte :index words
83 :scale (ash 1 (- word-shift n-fixnum-tag-bits))
85 (* vector-data-offset n-word-bytes))))
86 (inst and result (lognot lowtag-mask))
88 (allocation result result)
89 (inst lea result (make-ea :byte :base result :disp other-pointer-lowtag))
90 (storew type result 0 other-pointer-lowtag)
91 (storew length result vector-length-slot other-pointer-lowtag))))
93 (define-vop (allocate-vector-on-stack)
94 (:args (type :scs (unsigned-reg) :to :save)
95 (length :scs (any-reg) :to :eval :target zero)
96 (words :scs (any-reg) :target ecx))
97 (:temporary (:sc any-reg :offset ecx-offset :from (:argument 2)) ecx)
98 (:temporary (:sc any-reg :offset eax-offset :from :eval) zero)
99 (:temporary (:sc any-reg :offset edi-offset) res)
100 (:results (result :scs (descriptor-reg) :from :load))
101 (:arg-types positive-fixnum
104 (:translate allocate-vector)
108 (inst lea result (make-ea :byte :index words
109 :scale (ash 1 (- word-shift n-fixnum-tag-bits))
111 (* vector-data-offset n-word-bytes))))
112 (inst and result (lognot lowtag-mask))
113 ;; FIXME: It would be good to check for stack overflow here.
115 (inst shr ecx n-fixnum-tag-bits)
116 (allocation result result node t other-pointer-lowtag)
119 (make-ea :byte :base result :disp (- (* vector-data-offset n-word-bytes)
120 other-pointer-lowtag)))
121 (storew type result 0 other-pointer-lowtag)
122 (storew length result vector-length-slot other-pointer-lowtag)
128 (define-vop (make-fdefn)
130 (:translate make-fdefn)
131 (:args (name :scs (descriptor-reg) :to :eval))
132 (:results (result :scs (descriptor-reg) :from :argument))
135 (with-fixed-allocation (result fdefn-widetag fdefn-size node)
136 (storew name result fdefn-name-slot other-pointer-lowtag)
137 (storew nil-value result fdefn-fun-slot other-pointer-lowtag)
138 (storew (make-fixup "undefined_tramp" :foreign)
139 result fdefn-raw-addr-slot other-pointer-lowtag))))
141 (define-vop (make-closure)
142 (:args (function :to :save :scs (descriptor-reg)))
143 (:info length stack-allocate-p)
144 (:temporary (:sc any-reg) temp)
145 (:results (result :scs (descriptor-reg)))
148 (maybe-pseudo-atomic stack-allocate-p
149 (let ((size (+ length closure-info-offset)))
150 (allocation result (pad-data-block size) node stack-allocate-p
152 (storew (logior (ash (1- size) n-widetag-bits) closure-header-widetag)
153 result 0 fun-pointer-lowtag))
154 (loadw temp function closure-fun-slot fun-pointer-lowtag)
155 (storew temp result closure-fun-slot fun-pointer-lowtag))))
157 ;;; The compiler likes to be able to directly make value cells.
158 (define-vop (make-value-cell)
159 (:args (value :scs (descriptor-reg any-reg) :to :result))
160 (:results (result :scs (descriptor-reg) :from :eval))
161 (:info stack-allocate-p)
164 (with-fixed-allocation
165 (result value-cell-header-widetag value-cell-size node stack-allocate-p)
166 (storew value result value-cell-value-slot other-pointer-lowtag))))
168 ;;;; automatic allocators for primitive objects
170 (define-vop (make-unbound-marker)
172 (:results (result :scs (descriptor-reg any-reg)))
174 (inst mov result unbound-marker-widetag)))
176 (define-vop (make-funcallable-instance-tramp)
178 (:results (result :scs (any-reg)))
180 (inst mov result (make-fixup "funcallable_instance_tramp" :foreign))))
182 (define-vop (fixed-alloc)
184 (:info name words type lowtag stack-allocate-p)
186 (:results (result :scs (descriptor-reg)))
189 (maybe-pseudo-atomic stack-allocate-p
190 (allocation result (pad-data-block words) node stack-allocate-p lowtag)
192 (storew (logior (ash (1- words) n-widetag-bits) type)
197 (define-vop (var-alloc)
198 (:args (extra :scs (any-reg)))
199 (:arg-types positive-fixnum)
200 (:info name words type lowtag)
202 (:results (result :scs (descriptor-reg) :from (:eval 1)))
203 (:temporary (:sc any-reg :from :eval :to (:eval 1)) bytes)
204 (:temporary (:sc any-reg :from :eval :to :result) header)
208 (make-ea :qword :disp (* (1+ words) n-word-bytes) :index extra
209 :scale (ash 1 (- word-shift n-fixnum-tag-bits))))
210 (inst mov header bytes)
211 (inst shl header (- n-widetag-bits word-shift)) ; w+1 to length field
212 (inst lea header ; (w-1 << 8) | type
213 (make-ea :qword :base header
214 :disp (+ (ash -2 n-widetag-bits) type)))
215 (inst and bytes (lognot lowtag-mask))
217 (allocation result bytes node)
218 (inst lea result (make-ea :byte :base result :disp lowtag))
219 (storew header result 0 lowtag))))