usr/src/lib/libm/common/R/sinhf.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  23  */
  24 /*
  25  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29 #pragma weak __sinhf = sinhf
  30
  31 #include "libm.h"
  32
  33 float
  34 sinhf(float x) {
  35         double  s;
  36         float   w;
  37         int     hx, ix;
  38
  39         hx = *(int *)&x;
  40         ix = hx & ~0x80000000;
  41         if (ix >= 0x7f800000) {
  42                 /* sinhf(x) is x if x is +-Inf or NaN */
  43                 return (x * 1.0f);
  44         }
  45         if (ix >= 0x43000000)   /* sinhf(x) trivially overflows */
  46                 s = (hx < 0)? -1.0e100 : 1.0e100;
  47         else
  48                 s = sinh((double)x);
  49         w = (float)s;
  50         return (w);
  51 }