sysdeps/alpha/fpu/s_lround.c

   1 /* Copyright (C) 2007 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #define __llround       not___llround
  20 #define llround         not_llround
  21 #include <math.h>
  22 #include <math_ldbl_opt.h>
  23 #undef __llround
  24 #undef llround
  25
  26 long int
  27 __lround (double x)
  28 {
  29   double adj;
  30
  31   adj = 0x1.fffffffffffffp-2;   /* nextafter (0.5, 0.0) */
  32   adj = copysign (adj, x);
  33   return x + adj;
  34 }
  35
  36 strong_alias (__lround, __llround)
  37 weak_alias (__lround, lround)
  38 weak_alias (__llround, llround)
  39 #ifdef NO_LONG_DOUBLE
  40 strong_alias (__lround, __lroundl)
  41 strong_alias (__lround, __llroundl)
  42 weak_alias (__lroundl, lroundl)
  43 weak_alias (__llroundl, llroundl)
  44 #endif
  45 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
  46 compat_symbol (libm, __lround, lroundl, GLIBC_2_1);
  47 compat_symbol (libm, __llround, llroundl, GLIBC_2_1);
  48 #endif