X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Falloc.lisp;h=a0ec28b416c70cfd064e12b268cacdabee1685a2;hb=80f222325e1f677e5cf8de01c6990906fa47f65d;hp=47adf8f78c46cdf2c647da42c284ac8ead75e730;hpb=361040122aed4fd4e24bd014818955e5e3028a8f;p=sbcl.git diff --git a/src/compiler/x86/alloc.lisp b/src/compiler/x86/alloc.lisp index 47adf8f..a0ec28b 100644 --- a/src/compiler/x86/alloc.lisp +++ b/src/compiler/x86/alloc.lisp @@ -181,39 +181,4 @@ (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 (extern-alien-name "fast_random_state") :foreign) - 1103515245) - (inst add temp 12345) - (inst mov (make-fixup (extern-alien-name "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)))) +