sysdeps/aarch64/fpu/s_lrint.c

   1 /* Copyright (C) 1996-2015 Free Software Foundation, Inc.
   2
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <math.h>
  20
  21 #ifndef FUNC
  22 # define FUNC lrint
  23 #endif
  24
  25 #ifndef ITYPE
  26 # define ITYPE double
  27 # define IREGS "d"
  28 #else
  29 # ifndef IREGS
  30 #  error IREGS not defined
  31 # endif
  32 #endif
  33
  34 #ifndef OTYPE
  35 # define OTYPE long int
  36 #endif
  37
  38 #define OREGS "x"
  39
  40 #define __CONCATX(a,b) __CONCAT(a,b)
  41
  42 OTYPE
  43 __CONCATX(__,FUNC) (ITYPE x)
  44 {
  45   OTYPE result;
  46   ITYPE temp;
  47   asm ( "frintx" "\t%" IREGS "1, %" IREGS "2\n\t"
  48         "fcvtzs" "\t%" OREGS "0, %" IREGS "1"
  49         : "=r" (result), "=w" (temp) : "w" (x) );
  50   return result;
  51 }
  52
  53 weak_alias (__CONCATX(__,FUNC), FUNC)