From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 19 Oct 1999 03:32:17 +0000 (+0000)
Subject: (__cprojl): Fix bug: NaN + i NaN returns now NaN + i NaN.
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=91c4d9d89f1eff92b51acdcd04389aa8b658f6a1;p=thirdparty%2Fglibc.git

(__cprojl): Fix bug: NaN + i NaN returns now NaN + i NaN.
---

diff --git a/sysdeps/libm-ieee754/s_cprojl.c b/sysdeps/libm-ieee754/s_cprojl.c
index 13da4b417d8..cac04079261 100644
--- a/sysdeps/libm-ieee754/s_cprojl.c
+++ b/sysdeps/libm-ieee754/s_cprojl.c
@@ -1,5 +1,5 @@
 /* Compute projection of complex long double value to Riemann sphere.
-   Copyright (C) 1997 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1999 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -27,7 +27,9 @@ __cprojl (__complex__ long double x)
 {
   __complex__ long double res;
 
-  if (!isfinite (__real__ x) || !isfinite (__imag__ x))
+  if (isnan (__real__ x) && isnan (__imag__ x))
+    return x;
+  else if (!isfinite (__real__ x) || !isfinite (__imag__ x))
     {
       __real__ res = INFINITY;
       __imag__ res = __copysignl (0.0, __imag__ x);