1/* Definitions of target machine for GNU compiler, for MMIX.
2   Copyright (C) 2002 Free Software Foundation, Inc.
3   Contributed by Hans-Peter Nilsson (hp@bitrange.com)
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.  */
21
22/* Node: Condition Code */
23
24/* Like other non-CC0 ports, MMIX need to code which combination of
25   comparison insn and branch insn or conditional-set insn to use into the
26   condition mode.  The CC mode depends partly on which condition is used
27   and partly on the type of the operands.  */
28
29/* The "usual" CC mode is used for a signed operands integer comparison,
30   where the CMP insn is used and the result is (integer) -1, 0 or 1 for
31   respectively a < b, a == b and a > b.  */
32
33/* The CC_UNS mode is for an unsigned operands integer comparison using
34   the CMPU insn.  Result values correspond to those in CCmode.  */
35CC (CC_UNS)
36
37/* The CC_FP mode is for an non-equality floating-point comparison, using
38   the FCMP or FCMPE insn.  The result is (integer) -1 or 1 for
39   espectively a < b and a > b, otherwise 0.  */
40CC (CC_FP)
41
42/* The CC_FPEQ mode is for an equality floating-point comparison, using
43   the FEQL or FEQLE insn.  The result is (integer) 1 for a == b,
44   otherwise 0 (including NaN:s).  */
45CC (CC_FPEQ)
46
47/* The CC_FUN mode is for an ordering comparison, using the FUN or FUNE
48   insn.  The result is (integer) 1 if a is unordered to b, otherwise the
49   result is 0.  */
50CC (CC_FUN)
51