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-rw-r--r--sysdeps/generic/s_cprojf.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/sysdeps/generic/s_cprojf.c b/sysdeps/generic/s_cprojf.c
index b90590835c..6ec8b66001 100644
--- a/sysdeps/generic/s_cprojf.c
+++ b/sysdeps/generic/s_cprojf.c
@@ -1,5 +1,5 @@
/* Compute projection of complex float 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 @@ __cprojf (__complex__ float x)
{
__complex__ float 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 = __copysignf (0.0, __imag__ x);