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11210 libm should be cstyle(1ONBLD) clean


   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 /*
  23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24  */

  25 /*
  26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  27  * Use is subject to license terms.
  28  */
  29 
  30 #pragma weak __coshl = coshl
  31 
  32 #include "libm.h"
  33 #include "longdouble.h"
  34 
  35 /*
  36  * COSH(X)
  37  * RETURN THE HYPERBOLIC COSINE OF X
  38  *
  39  * Method :
  40  *      1. Replace x by |x| (COSH(x) = COSH(-x)).
  41  *      2.
  42  *                                                      [ EXP(x) - 1 ]^2
  43  *          0        <= x <= 0.3465  :  COSH(x) := 1 + -------------------
  44  *                                                         2*EXP(x)


  66 
  67 static const long double C[] = {
  68         0.5L,
  69         1.0L,
  70         0.3465L,
  71         45.0L,
  72         1.135652340629414394879149e+04L,
  73         7.004447686242549087858985e-16L,
  74         2.710505431213761085018632e-20L,                /* 2^-65 */
  75 };
  76 
  77 #define half    C[0]
  78 #define one     C[1]
  79 #define thr1    C[2]
  80 #define thr2    C[3]
  81 #define lnovft  C[4]
  82 #define lnovlo  C[5]
  83 #define tinyl   C[6]
  84 
  85 long double
  86 coshl(long double x) {

  87         long double w, t;
  88 
  89         w = fabsl(x);

  90         if (!finitel(w))
  91                 return (w + w); /* x is INF or NaN */

  92         if (w < thr1) {
  93                 if (w < tinyl)
  94                         return (one + w);       /* inexact+directed rounding */

  95                 t = expm1l(w);
  96                 w = one + t;
  97                 w = one + (t * t) / (w + w);
  98                 return (w);
  99         }

 100         if (w < thr2) {
 101                 t = expl(w);
 102                 return (half * (t + one / t));
 103         }

 104         if (w <= lnovft)
 105                 return (half * expl(w));

 106         return (scalbnl(expl((w - lnovft) - lnovlo), 16383));
 107 }


   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 /*
  23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24  */
  25 
  26 /*
  27  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 
  31 #pragma weak __coshl = coshl
  32 
  33 #include "libm.h"
  34 #include "longdouble.h"
  35 
  36 /*
  37  * COSH(X)
  38  * RETURN THE HYPERBOLIC COSINE OF X
  39  *
  40  * Method :
  41  *      1. Replace x by |x| (COSH(x) = COSH(-x)).
  42  *      2.
  43  *                                                      [ EXP(x) - 1 ]^2
  44  *          0        <= x <= 0.3465  :  COSH(x) := 1 + -------------------
  45  *                                                         2*EXP(x)


  67 
  68 static const long double C[] = {
  69         0.5L,
  70         1.0L,
  71         0.3465L,
  72         45.0L,
  73         1.135652340629414394879149e+04L,
  74         7.004447686242549087858985e-16L,
  75         2.710505431213761085018632e-20L, /* 2^-65 */
  76 };
  77 
  78 #define half            C[0]
  79 #define one             C[1]
  80 #define thr1            C[2]
  81 #define thr2            C[3]
  82 #define lnovft          C[4]
  83 #define lnovlo          C[5]
  84 #define tinyl           C[6]
  85 
  86 long double
  87 coshl(long double x)
  88 {
  89         long double w, t;
  90 
  91         w = fabsl(x);
  92 
  93         if (!finitel(w))
  94                 return (w + w);         /* x is INF or NaN */
  95 
  96         if (w < thr1) {
  97                 if (w < tinyl)
  98                         return (one + w);       /* inexact+directed rounding */
  99 
 100                 t = expm1l(w);
 101                 w = one + t;
 102                 w = one + (t * t) / (w + w);
 103                 return (w);
 104         }
 105 
 106         if (w < thr2) {
 107                 t = expl(w);
 108                 return (half * (t + one / t));
 109         }
 110 
 111         if (w <= lnovft)
 112                 return (half * expl(w));
 113 
 114         return (scalbnl(expl((w - lnovft) - lnovlo), 16383));
 115 }