ots_cvttx.c

glibc 2.9,最新版的C语言库函数

/* Software floating-point emulation: floating point extension.
   Copyright (C) 1997,1999,2004,2006 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Richard Henderson ([e-mail]) and
		  Jakub Jelinek ([e-mail]).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include "local-soft-fp.h"
#include "double.h"

/* Should never actually be used, since we're extending, but needed
   for linkage.  */
#undef FP_ROUNDMODE
#define FP_ROUNDMODE  FP_RND_ZERO

void
_OtsConvertFloatTX(double a)
{
  FP_DECL_EX;
  FP_DECL_D(A);
  FP_DECL_Q(C);
  FP_DECL_RETURN(c);

  FP_UNPACK_RAW_D(A, a);
#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
  FP_EXTEND(Q,D,4,2,C,A);
#else
  FP_EXTEND(Q,D,2,1,C,A);
#endif
  FP_PACK_RAW_Q(c, C);
  FP_HANDLE_EXCEPTIONS;

  FP_RETURN(c);
}