sysdeps/riscv/rvd/s_lround.c

   1 /* llround().  RISC-V version.
   2    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <libm-alias-double.h>
  20 #include <stdint.h>
  21
  22 #if __WORDSIZE == 64
  23 # define OP "fcvt.l.d"
  24 #elif __WORDSIZE == 32
  25 # define OP "fcvt.w.d"
  26 #else
  27 # error Unsupported
  28 #endif
  29
  30 long int
  31 __lround (double x)
  32 {
  33   long int res;
  34   asm (OP "\t%0, %1, rmm" : "=r" (res) : "f" (x));
  35   return res;
  36 }
  37
  38 libm_alias_double (__lround, lround)