sysdeps/alpha/soft-fp/ots_cvtxt.c

   1 /* Software floating-point emulation: floating point truncation.
   2    Copyright (C) 1997-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Richard Henderson (rth@cygnus.com) and
   5                   Jakub Jelinek (jj@ultra.linux.cz).
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library.  If not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include "local-soft-fp.h"
  22 #include "double.h"
  23
  24 double
  25 _OtsConvertFloatXT (long al, long ah, long _round)
  26 {
  27   FP_DECL_EX;
  28   FP_DECL_Q(A);
  29   FP_DECL_D(R);
  30   double r;
  31
  32   FP_INIT_ROUNDMODE;
  33   AXP_UNPACK_SEMIRAW_Q(A, a);
  34 #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
  35   FP_TRUNC(D,Q,2,4,R,A);
  36 #else
  37   FP_TRUNC(D,Q,1,2,R,A);
  38 #endif
  39   FP_PACK_SEMIRAW_D(r, R);
  40   FP_HANDLE_EXCEPTIONS;
  41
  42   return r;
  43 }