(inst movs :qword)
(inst cmp rsp-tn rsi)
(inst jmp :be LOOP)
+ (inst cld)
DONE
(inst lea rsp-tn (make-ea :qword :base rdi :disp n-word-bytes))
(inst sub rdi rsi)
(inst and al-tn lowtag-mask)
(inst cmp al-tn list-pointer-lowtag)
(inst jmp :e LOOP)
- (error-call vop bogus-arg-to-values-list-error list)
+ (error-call vop 'bogus-arg-to-values-list-error list)
DONE
(inst mov count start) ; start is high address
- (inst sub count rsp-tn))) ; stackp is low address
+ (inst sub count rsp-tn) ; stackp is low address
+ #!-#.(cl:if (cl:= sb!vm:word-shift sb!vm:n-fixnum-tag-bits) '(and) '(or))
+ (inst shr count (- word-shift n-fixnum-tag-bits))))
;;; Copy the more arg block to the top of the stack so we can use them
;;; as function arguments.
(:arg-types * positive-fixnum positive-fixnum)
(:temporary (:sc any-reg :offset rsi-offset :from (:argument 0)) src)
(:temporary (:sc descriptor-reg :offset rax-offset) temp)
- (:temporary (:sc unsigned-reg :offset rcx-offset) temp1)
+ (:temporary (:sc unsigned-reg :offset rcx-offset) loop-index)
(:results (start :scs (any-reg))
(count :scs (any-reg)))
(:generator 20
(any-reg
(move src context)
+ #!+#.(cl:if (cl:= sb!vm:word-shift sb!vm:n-fixnum-tag-bits) '(and) '(or))
(inst sub src skip)
+ #!-#.(cl:if (cl:= sb!vm:word-shift sb!vm:n-fixnum-tag-bits) '(and) '(or))
+ (progn
+ ;; FIXME: This can't be efficient, but LEA (my first choice)
+ ;; doesn't do subtraction.
+ (inst shl skip (- word-shift n-fixnum-tag-bits))
+ (inst sub src skip)
+ (inst shr skip (- word-shift n-fixnum-tag-bits)))
(move count num)
(inst sub count skip)))
- (move temp1 count)
+ (inst lea loop-index (make-ea :byte :index count
+ :scale (ash 1 (- word-shift n-fixnum-tag-bits))))
(inst mov start rsp-tn)
- (inst jecxz DONE) ; check for 0 count?
+ (inst jrcxz DONE) ; check for 0 count?
- (inst shr temp1 word-shift) ; convert the fixnum to a count.
+ (inst sub rsp-tn loop-index)
+ (inst sub src loop-index)
- (inst std) ; move down the stack as more value are copied to the bottom.
LOOP
- (inst lods temp)
- (inst push temp)
- (inst loop LOOP)
+ (inst mov temp (make-ea :qword :base src :index loop-index))
+ (inst sub loop-index n-word-bytes)
+ (inst mov (make-ea :qword :base rsp-tn :index loop-index) temp)
+ (inst jmp :nz LOOP)
DONE))