ports/sysdeps/alpha/fpu/s_lround.c

   1 /* Copyright (C) 2007-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #define __llround       not___llround
  19 #define llround         not_llround
  20 #include <math.h>
  21 #include <math_ldbl_opt.h>
  22 #undef __llround
  23 #undef llround
  24
  25 long int
  26 __lround (double x)
  27 {
  28   double adj;
  29
  30   adj = 0x1.fffffffffffffp-2;   /* nextafter (0.5, 0.0) */
  31   adj = copysign (adj, x);
  32   return x + adj;
  33 }
  34
  35 strong_alias (__lround, __llround)
  36 weak_alias (__lround, lround)
  37 weak_alias (__llround, llround)
  38 #ifdef NO_LONG_DOUBLE
  39 strong_alias (__lround, __lroundl)
  40 strong_alias (__lround, __llroundl)
  41 weak_alias (__lroundl, lroundl)
  42 weak_alias (__llroundl, llroundl)
  43 #endif
  44 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
  45 compat_symbol (libm, __lround, lroundl, GLIBC_2_1);
  46 compat_symbol (libm, __llround, llroundl, GLIBC_2_1);
  47 #endif