-(in-package "SB!VM")
+;;;; the VM definition of various primitive memory access VOPs for
+;;;; MIPS
+
+;;;; 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
;;;; Data object ref/set stuff.
(:policy :fast)
(:translate symbol-value))
+(define-vop (symbol-hash)
+ (:policy :fast-safe)
+ (:translate symbol-hash)
+ (:args (symbol :scs (descriptor-reg)))
+ (:results (res :scs (any-reg)))
+ (:result-types positive-fixnum)
+ (:temporary (:scs (any-reg)) temp)
+ (:generator 2
+ ;; The symbol-hash slot of NIL holds NIL because it is also the
+ ;; cdr slot, so we have to strip off the two low bits to make sure
+ ;; it is a fixnum. The lowtag selection magic that is required to
+ ;; ensure this is explained in the comment in objdef.lisp
+ ;;
+ ;; wow, MIPS sucks (or I do) -- CSR, 2004-05-20
+ (inst li temp (fixnumize -1))
+ (loadw res symbol symbol-hash-slot other-pointer-lowtag)
+ (inst and res temp)))
\f
;;;; Fdefinition (fdefn) objects.