1/* Definitions of target machine for GNU compiler, for MMIX.
2   Copyright (C) 2002-2015 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 3, 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 COPYING3.  If not see
19<http://www.gnu.org/licenses/>.  */
20
21/* Node: Condition Code */
22
23/* Like other non-CC0 ports, MMIX need to code which combination of
24   comparison insn and branch insn or conditional-set insn to use into the
25   condition mode.  The CC mode depends partly on which condition is used
26   and partly on the type of the operands.  */
27
28/* The "usual" CC mode is used for a signed operands integer comparison,
29   where the CMP insn is used and the result is (integer) -1, 0 or 1 for
30   respectively a < b, a == b and a > b.  */
31
32/* The CC_UNS mode is for an unsigned operands integer comparison using
33   the CMPU insn.  Result values correspond to those in CCmode.  */
34CC_MODE (CC_UNS);
35
36/* The CC_FP mode is for a non-equality floating-point comparison, using
37   the FCMP or FCMPE insn.  The result is (integer) -1 or 1 for
38   respectively a < b and a > b, otherwise 0.  */
39CC_MODE (CC_FP);
40
41/* The CC_FPEQ mode is for an equality floating-point comparison, using
42   the FEQL or FEQLE insn.  The result is (integer) 1 for a == b,
43   otherwise 0 (including NaN:s).  */
44CC_MODE (CC_FPEQ);
45
46/* The CC_FUN mode is for an ordering comparison, using the FUN or FUNE
47   insn.  The result is (integer) 1 if a is unordered to b, otherwise the
48   result is 0.  */
49CC_MODE (CC_FUN);
50