From f0302940e7c2acb587971e3c99dfbd00aa4e2134 Mon Sep 17 00:00:00 2001
From: Joseph Myers <joseph@codesourcery.com>
Date: Fri, 26 Apr 2013 19:25:19 +0000
Subject: Fix csin, csinh, ccos, ccosh missing underflows (bug 15405).

---
 math/s_csin.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'math/s_csin.c')

diff --git a/math/s_csin.c b/math/s_csin.c
index cc1c9cd..6d28e4c 100644
--- a/math/s_csin.c
+++ b/math/s_csin.c
@@ -88,6 +88,19 @@ __csin (__complex__ double x)
 
 	  if (negate)
 	    __real__ retval = -__real__ retval;
+
+	  if (fabs (__real__ retval) < DBL_MIN)
+	    {
+	      volatile double force_underflow
+		= __real__ retval * __real__ retval;
+	      (void) force_underflow;
+	    }
+	  if (fabs (__imag__ retval) < DBL_MIN)
+	    {
+	      volatile double force_underflow
+		= __imag__ retval * __imag__ retval;
+	      (void) force_underflow;
+	    }
 	}
       else
 	{
-- 
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