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authorJoseph Myers <joseph@codesourcery.com>2013-08-23 19:45:38 +0000
committerJoseph Myers <joseph@codesourcery.com>2013-08-23 19:45:38 +0000
commit8fe89494e6516048759425ec30d8878a6233e00f (patch)
treeb3f65b97d02bac4f183da5fe51e01cad8b8a3780 /math/s_cexpf.c
parent936241e4b2ec90bbb97d1b37bc78726372ec966f (diff)
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Fix cexp (NaN + i0) (bug 15532).
Diffstat (limited to 'math/s_cexpf.c')
-rw-r--r--math/s_cexpf.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/math/s_cexpf.c b/math/s_cexpf.c
index fa942d34f7..7c42205164 100644
--- a/math/s_cexpf.c
+++ b/math/s_cexpf.c
@@ -145,12 +145,18 @@ __cexpf (__complex__ float x)
     }
   else
     {
-      /* If the real part is NaN the result is NaN + iNaN.  */
+      /* If the real part is NaN the result is NaN + iNaN unless the
+	 imaginary part is zero.  */
       __real__ retval = __nanf ("");
-      __imag__ retval = __nanf ("");
+      if (icls == FP_ZERO)
+	__imag__ retval = __imag__ x;
+      else
+	{
+	  __imag__ retval = __nanf ("");
 
-      if (rcls != FP_NAN || icls != FP_NAN)
-	feraiseexcept (FE_INVALID);
+	  if (rcls != FP_NAN || icls != FP_NAN)
+	    feraiseexcept (FE_INVALID);
+	}
     }
 
   return retval;