X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fppc%2Finsts.lisp;h=4bbf5f492aff14e92abcf56c357ef571a52e4700;hb=942e45e3bb73fd55786e4a0ab4590324063c0c89;hp=b14927a98d530185b2eeffc550b0ef6751f73c0b;hpb=d319b944d934f3efbb01a2a345c46bafd40857d0;p=sbcl.git

diff --git a/src/compiler/ppc/insts.lisp b/src/compiler/ppc/insts.lisp
index b14927a..4bbf5f4 100644
--- a/src/compiler/ppc/insts.lisp
+++ b/src/compiler/ppc/insts.lisp
@@ -1840,6 +1840,12 @@
   (define-instruction-macro srwi. (ra rs n)
     `(inst rlwinm. ,ra ,rs (- 32 ,n) ,n 31))
 
+  (define-instruction-macro clrlwi (ra rs n)
+    `(inst rlwinm ,ra ,rs 0 ,n 31))
+
+  (define-instruction-macro clrlwi. (ra rs n)
+    `(inst rlwinm. ,ra ,rs 0 ,n 31))
+
   (define-instruction-macro clrrwi (ra rs n)
     `(inst rlwinm ,ra ,rs 0 0 (- 31 ,n)))
 
@@ -2083,10 +2089,8 @@
                    (inst ori temp temp (ldb (byte 16 0) delta))
                    (inst add dst src temp))))))
 
-;; this function is misnamed.  should be compute-code-from-lip,
-;; if the use in xep-allocate-frame is typical
-;; (someone says code = fn - header - label-offset + other-pointer-tag)
-(define-instruction compute-code-from-fn (segment dst src label temp)
+;; code = lip - header - label-offset + other-pointer-tag
+(define-instruction compute-code-from-lip (segment dst src label temp)
   (:declare (type tn dst src temp) (type label label))
   (:attributes variable-length)
   (:dependencies (reads src) (writes dst) (writes temp))
@@ -2101,6 +2105,7 @@
                              (component-header-length))))))
 
 ;; code = lra - other-pointer-tag - header - label-offset + other-pointer-tag
+;;      = lra - (header + label-offset)
 (define-instruction compute-code-from-lra (segment dst src label temp)
   (:declare (type tn dst src temp) (type label label))
   (:attributes variable-length)
@@ -2114,6 +2119,7 @@
                                 (component-header-length)))))))
 
 ;; lra = code + other-pointer-tag + header + label-offset - other-pointer-tag
+;;     = code + header + label-offset
 (define-instruction compute-lra-from-code (segment dst src label temp)
   (:declare (type tn dst src temp) (type label label))
   (:attributes variable-length)