From 3129af3ce24b38999f0fe05fb286f455ad15548a Mon Sep 17 00:00:00 2001
From: ram <ram>
Date: Sat, 16 Nov 1991 15:49:08 +0000
Subject: [PATCH] Fixed DEFKNOWN for ATAN to allow two arguments again.

---
 compiler/fndb.lisp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/compiler/fndb.lisp b/compiler/fndb.lisp
index 4d66d222e..8b79f6220 100644
--- a/compiler/fndb.lisp
+++ b/compiler/fndb.lisp
@@ -7,7 +7,7 @@
 ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
 ;;;
 (ext:file-comment
-  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/fndb.lisp,v 1.30 1991/11/12 16:10:39 ram Exp $")
+  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/fndb.lisp,v 1.31 1991/11/16 15:49:08 ram Exp $")
 ;;;
 ;;; **********************************************************************
 ;;;
@@ -246,7 +246,12 @@
   (movable foldable flushable explicit-check recursive)
   :derive-type #'result-type-float-contagion)
 
-(defknown (atan tan sinh cosh tanh asinh)
+(defknown atan
+  (number &optional real) irrational
+  (movable foldable flushable explicit-check recursive)
+  :derive-type #'result-type-float-contagion)
+
+(defknown (tan sinh cosh tanh asinh)
   (number) irrational (movable foldable flushable explicit-check recursive)
   :derive-type #'result-type-float-contagion)
 
-- 
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