i960-modes.def

gcc-you can use this code to learn something about gcc, and inquire further into linux,

/* Definitions of target machine for GNU compiler, for Intel 80960
   Copyright (C) 2002 Free Software Foundation, Inc.
   Contributed by Steven McGeady, Intel Corp.
   Additional Work by Glenn Colon-Bonet, Jonathan Shapiro, Andy Wilson
   Converted to GCC 2.0 by Jim Wilson and Michael Tiemann, Cygnus Support.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Add any extra modes needed to represent the condition code.

   Also, signed and unsigned comparisons are distinguished, as
   are operations which are compatible with chkbit insns.  */

CC (CC_UNS)
CC (CC_CHK)