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-rw-r--r--sysdeps/ieee754/flt-32/e_gammaf_r.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/sysdeps/ieee754/flt-32/e_gammaf_r.c b/sysdeps/ieee754/flt-32/e_gammaf_r.c
index f0cd43840b..bbd1a35a95 100644
--- a/sysdeps/ieee754/flt-32/e_gammaf_r.c
+++ b/sysdeps/ieee754/flt-32/e_gammaf_r.c
@@ -1,5 +1,5 @@
 /* Implementation of gamma function according to ISO C.
-   Copyright (C) 1997, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -45,8 +45,11 @@ __ieee754_gammaf_r (float x, int *signgamp)
       return (x - x) / (x - x);
     }
   if (hx == 0xff800000)
-    /* x == -Inf.  According to ISO this is NaN.  */
-    return x - x;
+    {
+      /* x == -Inf.  According to ISO this is NaN.  */
+      *signgamp = 0;
+      return x - x;
+    }
 
   /* XXX FIXME.  */
   return __ieee754_expf (__ieee754_lgammaf_r (x, signgamp));