libgcc/config/c6x/ltd.c

   1 /* Software floating-point emulation.
   2    Return 1 iff a < b, 0 otherwise.
   3    Copyright (C) 1997-2013 Free Software Foundation, Inc.
   4    Contributed by Richard Henderson (rth@cygnus.com) and
   5                   Jakub Jelinek (jj@ultra.linux.cz).
   6
   7    This file 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    In addition to the permissions in the GNU Lesser General Public
  13    License, the Free Software Foundation gives you unlimited
  14    permission to link the compiled version of this file into
  15    combinations with other programs, and to distribute those
  16    combinations without any restriction coming from the use of this
  17    file.  (The Lesser General Public License restrictions do apply in
  18    other respects; for example, they cover modification of the file,
  19    and distribution when not linked into a combine executable.)
  20
  21    This file is distributed in the hope that it will be useful,
  22    but WITHOUT ANY WARRANTY; without even the implied warranty of
  23    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24    Lesser General Public License for more details.
  25
  26    You should have received a copy of the GNU Lesser General Public
  27    License along with GCC; see the file COPYING.LIB.  If not see
  28    <http://www.gnu.org/licenses/>.  */
  29
  30 #include <soft-fp/soft-fp.h>
  31 #include <soft-fp/double.h>
  32
  33 CMPtype __c6xabi_ltd(DFtype a, DFtype b)
  34 {
  35   FP_DECL_EX;
  36   FP_DECL_D(A); FP_DECL_D(B);
  37   CMPtype r;
  38
  39   FP_UNPACK_RAW_D(A, a);
  40   FP_UNPACK_RAW_D(B, b);
  41   FP_CMP_D(r, A, B, 2);
  42   if (r == 2 && (FP_ISSIGNAN_D(A) || FP_ISSIGNAN_D(B)))
  43     FP_SET_EXCEPTION(FP_EX_INVALID);
  44   FP_HANDLE_EXCEPTIONS;
  45
  46   return r < 0;
  47 }