0.7.10.11:

[sbcl.git] / src / compiler / ppc / array.lisp

diff --git a/src/compiler/ppc/array.lisp b/src/compiler/ppc/array.lisp
index 8239a8f..f1e2683 100644 (file)
--- a/src/compiler/ppc/array.lisp
+++ b/src/compiler/ppc/array.lisp
@@ -1,6 +1,14 @@
-;;;
-;;; Written by William Lott
-;;;
+;;;; array operations for the PPC VM
+
+;;;; 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
@@ -180,9 +188,11 @@
         (:result-types positive-fixnum)
         (:temporary (:scs (non-descriptor-reg)) temp)
         (:generator 15
-          (multiple-value-bind (word extra) (floor index ,elements-per-word)
+          (multiple-value-bind (word extra)
+              (floor index ,elements-per-word)
             (setf extra (logxor extra (1- ,elements-per-word)))
-            (let ((offset (- (* (+ word sb!vm:vector-data-offset) sb!vm:n-word-bytes)
+            (let ((offset (- (* (+ word sb!vm:vector-data-offset)
+                                sb!vm:n-word-bytes)
                              sb!vm:other-pointer-lowtag)))
               (cond ((typep offset '(signed-byte 16))
                      (inst lwz result object offset))
@@ -190,8 +200,7 @@
                      (inst lr temp offset)
                      (inst lwzx result object temp))))
             (unless (zerop extra)
-              (inst srwi result result
-                    (logxor (* extra ,bits) ,(1- elements-per-word))))
+              (inst srwi result result (* ,bits extra)))
             (unless (= extra ,(1- elements-per-word))
               (inst andi. result result ,(1- (ash 1 bits)))))))
        (define-vop (,(symbolicate 'data-vector-set/ type))