(in-package "SB!VM")
\f
-(define-assembly-routine (allocate-vector
+(define-assembly-routine (allocate-vector-on-heap
(:policy :fast-safe)
+ #!-stack-allocatable-vectors
(:translate allocate-vector)
(:arg-types positive-fixnum
positive-fixnum
(:temp ndescr non-descriptor-reg nl0-offset)
(:temp pa-flag non-descriptor-reg nl3-offset)
- (:temp vector descriptor-reg a3-offset))
+ (:temp vector descriptor-reg a3-offset)
+ (:temp temp non-descriptor-reg nl2-offset))
(pseudo-atomic (pa-flag)
- (inst ori vector alloc-tn other-pointer-lowtag)
;; boxed words == unboxed bytes
(inst addi ndescr words (* (1+ vector-data-offset) n-word-bytes))
(inst clrrwi ndescr ndescr n-lowtag-bits)
- (inst add alloc-tn alloc-tn ndescr)
+ (allocation vector ndescr other-pointer-lowtag
+ :temp-tn temp
+ :flag-tn pa-flag)
(inst srwi ndescr type word-shift)
(storew ndescr vector 0 other-pointer-lowtag)
(storew length vector vector-length-slot other-pointer-lowtag))
;; This makes sure the zero byte at the end of a string is paged in so
;; the kernel doesn't bitch if we pass it the string.
- (storew zero-tn alloc-tn 0)
+ ;;
+ ;; rtoy says to turn this off as it causes problems with CMUCL.
+ ;;
+ ;; I don't think we need to do this anymore. It looks like this
+ ;; inherited from the SPARC port and does not seem to be
+ ;; necessary. Turning this on worked at some point, but I have not
+ ;; tested with the final GENGC-related changes. CLH 20060221
+ ;;
+ ;; (storew zero-tn alloc-tn 0)
(move result vector))
+#!+stack-allocatable-vectors
+(define-assembly-routine (allocate-vector-on-stack
+ (:policy :fast-safe)
+ (:arg-types positive-fixnum
+ positive-fixnum
+ positive-fixnum))
+ ((:arg type any-reg a0-offset)
+ (:arg length any-reg a1-offset)
+ (:arg words any-reg a2-offset)
+ (:res result descriptor-reg a0-offset)
+
+ (:temp ndescr non-descriptor-reg nl0-offset)
+ (:temp pa-flag non-descriptor-reg nl3-offset)
+ (:temp vector descriptor-reg a3-offset)
+ (:temp temp non-descriptor-reg nl2-offset))
+ (pseudo-atomic (pa-flag)
+ ;; boxed words == unboxed bytes
+ (inst addi ndescr words (* (1+ vector-data-offset) n-word-bytes))
+ (inst clrrwi ndescr ndescr n-lowtag-bits)
+ (align-csp temp)
+ (inst ori vector csp-tn other-pointer-lowtag)
+ (inst add csp-tn csp-tn ndescr)
+ (inst srwi temp type word-shift)
+ (storew temp vector 0 other-pointer-lowtag)
+ ;; Our storage is allocated, but not initialized, and our contract
+ ;; calls for it to be zero-fill. Do so now.
+ (let ((loop (gen-label)))
+ (inst addi temp vector (- n-word-bytes other-pointer-lowtag))
+ ;; The header word has already been set, skip it.
+ (inst addi ndescr ndescr (- (fixnumize 1)))
+ (emit-label loop)
+ (inst addic. ndescr ndescr (- (fixnumize 1)))
+ (storew zero-tn temp 0)
+ (inst addi temp temp n-word-bytes)
+ (inst bgt loop))
+ ;; Our zero-fill loop always executes at least one store, so to
+ ;; ensure that there is at least one slot available to be
+ ;; clobbered, we defer setting the vector-length slot until now.
+ (storew length vector vector-length-slot other-pointer-lowtag))
+ (move result vector))