-(in-package "SB!VM")
-
+;;;; various array operations that are too expensive (in space) to do
+;;;; inline
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+(in-package "SB!VM")
+\f
(define-assembly-routine (allocate-vector
- (:policy :fast-safe)
- (:translate allocate-vector)
- (: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))
+ (:policy :fast-safe)
+ (:translate allocate-vector)
+ (: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)
- (inst ori vector alloc-tn sb!vm:other-pointer-lowtag)
- (inst addi ndescr words (* (1+ sb!vm:vector-data-offset) sb!vm:n-word-bytes))
+ ;; 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)
- (inst srwi ndescr type sb!vm:word-shift)
- (storew ndescr vector 0 sb!vm:other-pointer-lowtag)
- (storew length vector sb!vm:vector-length-slot sb!vm:other-pointer-lowtag))
+ (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.
+ ;;
+ ;; 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))
-
-
-\f
-;;;; Hash primitives
-#|
-#+sb-assembling
-(defparameter sxhash-simple-substring-entry (gen-label))
-
-(define-assembly-routine (sxhash-simple-string
- (:translate %sxhash-simple-string)
- (:policy :fast-safe)
- (:result-types positive-fixnum))
- ((:arg string descriptor-reg a0-offset)
- (:res result any-reg a0-offset)
-
- (:temp length any-reg a1-offset)
- (:temp accum non-descriptor-reg nl0-offset)
- (:temp data non-descriptor-reg nl1-offset)
- (:temp temp non-descriptor-reg nl2-offset)
- (:temp offset non-descriptor-reg nl3-offset))
-
- (declare (ignore result accum data temp offset))
-
- (loadw length string sb!vm:vector-length-slot sb!vm:other-pointer-lowtag)
- (inst b sxhash-simple-substring-entry))
-
-
-(define-assembly-routine (sxhash-simple-substring
- (:translate %sxhash-simple-substring)
- (:policy :fast-safe)
- (:arg-types * positive-fixnum)
- (:result-types positive-fixnum))
- ((:arg string descriptor-reg a0-offset)
- (:arg length any-reg a1-offset)
- (:res result any-reg a0-offset)
-
- (:temp accum non-descriptor-reg nl0-offset)
- (:temp data non-descriptor-reg nl1-offset)
- (:temp temp non-descriptor-reg nl2-offset)
- (:temp offset non-descriptor-reg nl3-offset))
- (emit-label sxhash-simple-substring-entry)
-
- (inst li offset (- (* vector-data-offset n-word-bytes) other-pointer-lowtag))
- (move accum zero-tn)
- (inst b test)
-
- LOOP
-
- (inst xor accum accum data)
- (inst slwi temp accum 27)
- (inst srwi accum accum 5)
- (inst or accum accum temp)
- (inst addi offset offset 4)
-
- TEST
-
- (inst subic. length length (fixnumize 4))
- (inst lwzx data string offset)
- (inst bge loop)
-
- (inst addic. length length (fixnumize 4))
- (inst neg length length)
- (inst beq done)
- (inst slwi length length 1)
- (inst srw data data length)
- (inst xor accum accum data)
-
- DONE
-
- (inst slwi result accum 5)
- (inst srwi result result 3))
-|#
\ No newline at end of file
projects / sbcl.git / blobdiff