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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 __remainderl = remainderl
  31 
  32 #include "libm.h"
  33 #include "longdouble.h"
  34 
  35 /*
  36  * remainderl(x,p)
  37  *      returns  x REM p  =  x - [x/p]*p as if in infinite
  38  *      precise arithmetic, where [x/p] is the (inifinite bit)
  39  *      integer nearest x/p (in half way case choose the even one).
  40  * Method :
  41  *      Based on fmodl() return x-[x/p]chopped*p exactly.
  42  */
  43 
  44 #define HFMAX   5.948657476786158825428796633140035080982e+4931L
  45 #define DBMIN   6.724206286224187012525355634643505205196e-4932L
  46 
  47 static const long double
  48         zero = 0.0L,
  49         half = 0.5L,
  50         hfmax = HFMAX,  /* half of the maximum number */
  51         dbmin = DBMIN;  /* double of the minimum (normal) number */
  52 
  53 long double
  54 remainderl(long double x, long double p) {

  55         long double hp;
  56         int sx;
  57 
  58         if (isnanl(p))
  59                 return (x + p);

  60         if (!finitel(x))
  61                 return (x - x);

  62         p = fabsl(p);

  63         if (p <= hfmax)
  64                 x = fmodl(x, p + p);

  65         sx = signbitl(x);
  66         x = fabsl(x);

  67         if (p < dbmin) {
  68                 if (x + x > p) {
  69                         if (x == p)
  70                                 x = zero;
  71                         else
  72                                 x -= p; /* avoid x-x=-0 in RM mode */

  73                         if (x + x >= p)
  74                                 x -= p;
  75                 }
  76         } else {
  77                 hp = half * p;

  78                 if (x > hp) {
  79                         if (x == p)
  80                                 x = zero;
  81                         else
  82                                 x -= p; /* avoid x-x=-0 in RM mode */

  83                         if (x >= hp)
  84                                 x -= p;
  85                 }
  86         }

  87         return (sx == 0 ? x : -x);
  88 }


   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 __remainderl = remainderl
  32 
  33 #include "libm.h"
  34 #include "longdouble.h"
  35 
  36 /*
  37  * remainderl(x,p)
  38  *      returns  x REM p  =  x - [x/p]*p as if in infinite
  39  *      precise arithmetic, where [x/p] is the (inifinite bit)
  40  *      integer nearest x/p (in half way case choose the even one).
  41  * Method :
  42  *      Based on fmodl() return x-[x/p]chopped*p exactly.
  43  */
  44 
  45 #define HFMAX           5.948657476786158825428796633140035080982e+4931L
  46 #define DBMIN           6.724206286224187012525355634643505205196e-4932L
  47 
  48 static const long double zero = 0.0L,

  49         half = 0.5L,
  50         hfmax = HFMAX,  /* half of the maximum number */
  51         dbmin = DBMIN;  /* double of the minimum (normal) number */
  52 
  53 long double
  54 remainderl(long double x, long double p)
  55 {
  56         long double hp;
  57         int sx;
  58 
  59         if (isnanl(p))
  60                 return (x + p);
  61 
  62         if (!finitel(x))
  63                 return (x - x);
  64 
  65         p = fabsl(p);
  66 
  67         if (p <= hfmax)
  68                 x = fmodl(x, p + p);
  69 
  70         sx = signbitl(x);
  71         x = fabsl(x);
  72 
  73         if (p < dbmin) {
  74                 if (x + x > p) {
  75                         if (x == p)
  76                                 x = zero;
  77                         else
  78                                 x -= p;         /* avoid x-x=-0 in RM mode */
  79 
  80                         if (x + x >= p)
  81                                 x -= p;
  82                 }
  83         } else {
  84                 hp = half * p;
  85 
  86                 if (x > hp) {
  87                         if (x == p)
  88                                 x = zero;
  89                         else
  90                                 x -= p;         /* avoid x-x=-0 in RM mode */
  91 
  92                         if (x >= hp)
  93                                 x -= p;
  94                 }
  95         }
  96 
  97         return (sx == 0 ? x : -x);
  98 }