;;;; files for more information.
(in-package "SB!VM")
-
\f
;;;; LIST and LIST*
-(defoptimizer (list stack-allocate-result) ((&rest args))
- (not (null args)))
-(defoptimizer (list* stack-allocate-result) ((&rest args))
- (not (null (rest args))))
-
(define-vop (list-or-list*)
(:args (things :more t))
(:temporary (:scs (descriptor-reg) :type list) ptr)
(define-vop (list* list-or-list*)
(:variant t))
-
\f
;;;; Special purpose inline allocators.
+;;; ALLOCATE-VECTOR
+(define-vop (allocate-vector-on-heap)
+ (:args (type :scs (unsigned-reg))
+ (length :scs (any-reg))
+ (words :scs (any-reg)))
+ (:arg-types positive-fixnum
+ positive-fixnum
+ positive-fixnum)
+ (:temporary (:sc non-descriptor-reg) bytes)
+ (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
+ (:results (result :scs (descriptor-reg) :from :load))
+ (:policy :fast-safe)
+ (:generator 100
+ (inst addu bytes words (+ lowtag-mask
+ (* vector-data-offset n-word-bytes)))
+ (inst srl bytes n-lowtag-bits)
+ (inst sll bytes n-lowtag-bits)
+ (pseudo-atomic (pa-flag)
+ (inst or result alloc-tn other-pointer-lowtag)
+ (inst addu alloc-tn bytes)
+ (storew type result 0 other-pointer-lowtag)
+ (storew length result vector-length-slot other-pointer-lowtag))))
+
+(define-vop (allocate-vector-on-stack)
+ (:args (type :scs (unsigned-reg))
+ (length :scs (any-reg))
+ (words :scs (any-reg)))
+ (:arg-types positive-fixnum
+ positive-fixnum
+ positive-fixnum)
+ (:temporary (:sc non-descriptor-reg) bytes)
+ (:temporary (:sc non-descriptor-reg) temp)
+ (:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
+ (:results (result :scs (descriptor-reg) :from :load))
+ (:policy :fast-safe)
+ (:generator 100
+ (inst addu bytes words (+ lowtag-mask
+ (* vector-data-offset n-word-bytes)))
+ (inst srl bytes n-lowtag-bits)
+ (inst sll bytes n-lowtag-bits)
+ ;; FIXME: It would be good to check for stack overflow here.
+ (pseudo-atomic (pa-flag)
+ (align-csp temp)
+ (inst or result csp-tn other-pointer-lowtag)
+ (inst addu temp csp-tn (* vector-data-offset n-word-bytes))
+ (inst addu csp-tn bytes)
+ (storew type result 0 other-pointer-lowtag)
+ (storew length result vector-length-slot other-pointer-lowtag)
+ (let ((loop (gen-label)))
+ (emit-label loop)
+ (storew zero-tn temp 0)
+ (inst bne temp csp-tn loop)
+ (inst addu temp n-word-bytes))
+ (align-csp temp))))
+
(define-vop (allocate-code-object)
(:args (boxed-arg :scs (any-reg))
(unboxed-arg :scs (any-reg)))
(:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
(:results (result :scs (descriptor-reg) :from :argument))
(:generator 37
- (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size)
+ (with-fixed-allocation (result pa-flag temp fdefn-widetag fdefn-size nil)
(inst li temp (make-fixup "undefined_tramp" :foreign))
(storew name result fdefn-name-slot other-pointer-lowtag)
(storew null-tn result fdefn-fun-slot other-pointer-lowtag)
(inst or result fun-pointer-lowtag)
(inst li temp (logior (ash (1- size) n-widetag-bits)
closure-header-widetag))
- (storew temp result 0 fun-pointer-lowtag))
- (storew function result closure-fun-slot fun-pointer-lowtag))))
+ (storew temp result 0 fun-pointer-lowtag)
+ (storew function result closure-fun-slot fun-pointer-lowtag)))))
;;; The compiler likes to be able to directly make value cells.
(define-vop (make-value-cell)
(:temporary (:scs (non-descriptor-reg)) temp)
(:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
(:info stack-allocate-p)
- (:ignore stack-allocate-p)
(:results (result :scs (descriptor-reg)))
(:generator 10
- (with-fixed-allocation (result pa-flag temp value-cell-header-widetag value-cell-size)
+ (with-fixed-allocation (result pa-flag temp value-cell-header-widetag
+ value-cell-size stack-allocate-p)
(storew value result value-cell-value-slot other-pointer-lowtag))))
-
\f
;;;; Automatic allocators for primitive objects.
(define-vop (fixed-alloc)
(:args)
- (:info name words type lowtag)
+ (:info name words type lowtag stack-allocate-p)
(:ignore name)
(:results (result :scs (descriptor-reg)))
(:temporary (:scs (non-descriptor-reg)) temp)
(:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
(:generator 4
- (pseudo-atomic (pa-flag :extra (pad-data-block words))
- (inst or result alloc-tn lowtag)
+ (pseudo-atomic (pa-flag :extra (if stack-allocate-p
+ 0
+ (pad-data-block words)))
+ (cond (stack-allocate-p
+ (align-csp result)
+ (inst or result csp-tn lowtag)
+ (inst addu csp-tn (pad-data-block words)))
+ (t
+ ;; The pseudo-atomic bit in alloc-tn is set. If the
+ ;; lowtag also has a 1 bit in the same position, we're all
+ ;; set. Otherwise, we need to subtract the pseudo-atomic
+ ;; bit.
+ (inst or result alloc-tn (if (logbitp 0 lowtag) lowtag
+ (1- lowtag)))))
(when type
(inst li temp (logior (ash (1- words) n-widetag-bits) type))
(storew temp result 0 lowtag)))))
(:temporary (:sc non-descriptor-reg :offset nl4-offset) pa-flag)
(:generator 6
(inst addu bytes extra (* (1+ words) n-word-bytes))
- (inst sll header bytes (- n-widetag-bits 2))
+ (inst sll header bytes (- n-widetag-bits n-fixnum-tag-bits))
(inst addu header header (+ (ash -2 n-widetag-bits) type))
(inst srl bytes bytes n-lowtag-bits)
(inst sll bytes bytes n-lowtag-bits)
projects / sbcl.git / blobdiff