0.8.14.3:

[sbcl.git] / src / compiler / hppa / cell.lisp

diff --git a/src/compiler/hppa/cell.lisp b/src/compiler/hppa/cell.lisp
index 50df91a..98bcb26 100644 (file)
--- a/src/compiler/hppa/cell.lisp
+++ b/src/compiler/hppa/cell.lisp
@@ -1,5 +1,16 @@
-(in-package "SB!VM")
+;;;; the VM definition of various primitive memory access VOPs for
+;;;; HPPA
+
+;;;; 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.
 
@@ -19,18 +30,14 @@
   (:results)
   (:generator 1
     (storew value object offset lowtag)))
-
-
 \f
 ;;;; Symbol hacking VOPs:
 
 ;;; The compiler likes to be able to directly SET symbols.
-;;;
 (define-vop (set cell-set)
   (:variant symbol-value-slot other-pointer-lowtag))
 
 ;;; Do a cell ref with an error check for being unbound.
-;;;
 (define-vop (checked-cell-ref)
   (:args (object :scs (descriptor-reg) :target obj-temp))
   (:results (value :scs (descriptor-reg any-reg)))
@@ -42,7 +49,6 @@
 
 ;;; With Symbol-Value, we check that the value isn't the trap object.  So
 ;;; Symbol-Value of NIL is NIL.
-;;;
 (define-vop (symbol-value checked-cell-ref)
   (:translate symbol-value)
   (:generator 9
@@ -73,7 +79,19 @@
   (: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)
+  (: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
+    (loadw res symbol symbol-hash-slot other-pointer-lowtag)
+    (inst andcm res #b11 res)))
 \f
 ;;;; Fdefinition (fdefn) objects.