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 fmax = __fmax
  31 
  32 /*
  33  * fmax(x,y) returns the larger of x and y.  If just one of the
  34  * arguments is NaN, fmax returns the other argument.  If both
  35  * arguments are NaN, fmax returns NaN.
  36  *
  37  * See fmaxf.c for a discussion of implementation trade-offs.
  38  */
  39 
  40 #include "libm.h"       /* for isgreaterequal macro */
  41 #include <fenv.h>
  42 
  43 double
  44 __fmax(double x, double y) {

  45         union {
  46                 unsigned i[2];
  47                 double d;
  48         } xx, yy;

  49         unsigned s;
  50 
  51         /* if y is nan, replace it by x */
  52         if (y != y)
  53                 y = x;
  54 
  55         /* if x is nan, replace it by y */
  56         if (x != x)
  57                 x = y;
  58 
  59         /* At this point, x and y are either both numeric, or both NaN */
  60         if (!isnan(x) && !isgreaterequal(x, y))
  61                 x = y;
  62 
  63         /*
  64          * clear the sign of the result if either x or y has its sign clear
  65          */
  66         xx.d = x;
  67         yy.d = y;
  68 #if defined(__sparc)

   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 fmax = __fmax
  32 
  33 /*
  34  * fmax(x,y) returns the larger of x and y.  If just one of the
  35  * arguments is NaN, fmax returns the other argument.  If both
  36  * arguments are NaN, fmax returns NaN.
  37  *
  38  * See fmaxf.c for a discussion of implementation trade-offs.
  39  */
  40 
  41 #include "libm.h"                       /* for isgreaterequal macro */
  42 #include <fenv.h>
  43 
  44 double
  45 __fmax(double x, double y)
  46 {
  47         union {
  48                 unsigned i[2];
  49                 double d;
  50         } xx, yy;
  51 
  52         unsigned s;
  53 
  54         /* if y is nan, replace it by x */
  55         if (y != y)
  56                 y = x;
  57 
  58         /* if x is nan, replace it by y */
  59         if (x != x)
  60                 x = y;
  61 
  62         /* At this point, x and y are either both numeric, or both NaN */
  63         if (!isnan(x) && !isgreaterequal(x, y))
  64                 x = y;
  65 
  66         /*
  67          * clear the sign of the result if either x or y has its sign clear
  68          */
  69         xx.d = x;
  70         yy.d = y;
  71 #if defined(__sparc)