positive-fixnum)
(:policy :fast-safe)
(:generator 100
- (inst lea result (make-ea :byte :base words :disp
- (+ (1- (ash 1 n-lowtag-bits))
- (* vector-data-offset n-word-bytes))))
+ (inst lea result (make-ea :byte :index words
+ :scale (ash 1 (- word-shift n-fixnum-tag-bits))
+ :disp (+ lowtag-mask
+ (* vector-data-offset n-word-bytes))))
(inst and result (lognot lowtag-mask))
(pseudo-atomic
(allocation result result)
(storew length result vector-length-slot other-pointer-lowtag))))
(define-vop (allocate-vector-on-stack)
- (:args (type :scs (unsigned-reg))
- (length :scs (any-reg))
+ (:args (type :scs (unsigned-reg) :to :save)
+ (length :scs (any-reg) :to :eval :target zero)
(words :scs (any-reg) :target ecx))
(:temporary (:sc any-reg :offset ecx-offset :from (:argument 2)) ecx)
- (:temporary (:sc any-reg :offset eax-offset :from (:argument 2)) zero)
- (:temporary (:sc any-reg :offset edi-offset :from (:argument 0)) res)
+ (:temporary (:sc any-reg :offset eax-offset :from :eval) zero)
+ (:temporary (:sc any-reg :offset edi-offset) res)
(:results (result :scs (descriptor-reg) :from :load))
(:arg-types positive-fixnum
positive-fixnum
(:policy :fast-safe)
(:node-var node)
(:generator 100
- (inst lea result (make-ea :byte :base words :disp
- (+ (1- (ash 1 n-lowtag-bits))
- (* vector-data-offset n-word-bytes))))
+ (inst lea result (make-ea :byte :index words
+ :scale (ash 1 (- word-shift n-fixnum-tag-bits))
+ :disp (+ lowtag-mask
+ (* vector-data-offset n-word-bytes))))
(inst and result (lognot lowtag-mask))
;; FIXME: It would be good to check for stack overflow here.
(move ecx words)
(inst rep)
(inst stos zero)))
-(in-package "SB!VM")
-
-;;;
-(define-vop (allocate-code-object)
- (:args (boxed-arg :scs (any-reg) :target boxed)
- (unboxed-arg :scs (any-reg) :target unboxed))
- (:results (result :scs (descriptor-reg) :from :eval))
- (:temporary (:sc unsigned-reg :from (:argument 0)) boxed)
- (:temporary (:sc unsigned-reg :from (:argument 1)) unboxed)
- (:node-var node)
- (:generator 100
- (move boxed boxed-arg)
- (inst add boxed (fixnumize (1+ code-trace-table-offset-slot)))
- (inst and boxed (lognot lowtag-mask))
- (move unboxed unboxed-arg)
- (inst shr unboxed word-shift)
- (inst add unboxed lowtag-mask)
- (inst and unboxed (lognot lowtag-mask))
- (inst mov result boxed)
- (inst add result unboxed)
- (pseudo-atomic
- (allocation result result node)
- (inst lea result (make-ea :byte :base result :disp other-pointer-lowtag))
- (inst shl boxed (- n-widetag-bits word-shift))
- (inst or boxed code-header-widetag)
- (storew boxed result 0 other-pointer-lowtag)
- (storew unboxed result code-code-size-slot other-pointer-lowtag)
- (storew nil-value result code-entry-points-slot other-pointer-lowtag))
- (storew nil-value result code-debug-info-slot other-pointer-lowtag)))
\f
(define-vop (make-fdefn)
(:policy :fast-safe)
(define-vop (make-unbound-marker)
(:args)
- (:results (result :scs (any-reg)))
+ (:results (result :scs (descriptor-reg any-reg)))
(:generator 1
(inst mov result unbound-marker-widetag)))
(:args)
(:results (result :scs (any-reg)))
(:generator 1
- (inst lea result (make-fixup "funcallable_instance_tramp" :foreign))))
+ (inst mov result (make-fixup "funcallable_instance_tramp" :foreign))))
(define-vop (fixed-alloc)
(:args)
(:node-var node)
(:generator 50
(inst lea bytes
- (make-ea :qword :base extra :disp (* (1+ words) n-word-bytes)))
+ (make-ea :qword :disp (* (1+ words) n-word-bytes) :index extra
+ :scale (ash 1 (- word-shift n-fixnum-tag-bits))))
(inst mov header bytes)
- (inst shl header (- n-widetag-bits 3)) ; w+1 to length field
+ (inst shl header (- n-widetag-bits word-shift)) ; w+1 to length field
(inst lea header ; (w-1 << 8) | type
- (make-ea :qword :base header :disp (+ (ash -2 n-widetag-bits) type)))
+ (make-ea :qword :base header
+ :disp (+ (ash -2 n-widetag-bits) type)))
(inst and bytes (lognot lowtag-mask))
(pseudo-atomic
(allocation result bytes node)
(inst lea result (make-ea :byte :base result :disp lowtag))
(storew header result 0 lowtag))))
-
-(define-vop (%make-symbol)
- (:policy :fast-safe)
- (:translate %make-symbol)
- (:args (name :scs (descriptor-reg) :to :eval))
- (:temporary (:sc unsigned-reg :from :eval) temp)
- (:results (result :scs (descriptor-reg) :from :argument))
- (:node-var node)
- (:generator 37
- (with-fixed-allocation (result symbol-header-widetag symbol-size node)
- (storew name result symbol-name-slot other-pointer-lowtag)
- (storew unbound-marker-widetag
- result
- symbol-value-slot
- other-pointer-lowtag)
- ;; Set up a random hash value for the symbol. Perhaps the object
- ;; address could be used for even faster and smaller code!
- ;; FIXME: We don't mind the symbol hash not being repeatable, so
- ;; we might as well add in the object address here, too. (Adding entropy
- ;; is good, even if ANSI doesn't understand that.)
- (inst imul temp
- (make-fixup "fast_random_state" :foreign)
- 1103515245)
- (inst add temp 12345)
- (inst mov (make-fixup "fast_random_state" :foreign)
- temp)
- ;; We want a positive fixnum for the hash value, so discard the LS bits.
- ;;
- ;; FIXME: OK, who wants to tell me (CSR) why these two
- ;; instructions aren't replaced by (INST AND TEMP #x8FFFFFFC)?
- ;; Are the following two instructions actually faster? Does the
- ;; difference in behaviour really matter?
- (inst shr temp 1)
- (inst and temp #xfffffffc)
- (storew temp result symbol-hash-slot other-pointer-lowtag)
- (storew nil-value result symbol-plist-slot other-pointer-lowtag)
- (storew nil-value result symbol-package-slot other-pointer-lowtag))))