sysdeps/alpha/soft-fp/ots_cvtxt.c

   1 /* Software floating-point emulation: floating point truncation.
   2    Copyright (C) 1997,1999,2004,2006 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, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #include "local-soft-fp.h"
  23 #include "double.h"
  24
  25 double
  26 _OtsConvertFloatXT (long al, long ah, long _round)
  27 {
  28   FP_DECL_EX;
  29   FP_DECL_Q(A);
  30   FP_DECL_D(R);
  31   double r;
  32
  33   FP_INIT_ROUNDMODE;
  34   FP_UNPACK_SEMIRAW_Q(A, a);
  35 #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
  36   FP_TRUNC(D,Q,2,4,R,A);
  37 #else
  38   FP_TRUNC(D,Q,1,2,R,A);
  39 #endif
  40   FP_PACK_SEMIRAW_D(r, R);
  41   FP_HANDLE_EXCEPTIONS;
  42
  43   return r;
  44 }