|
0
|
1 /* Definitions of target machine for GNU compiler, for MMIX.
|
|
111
|
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
|
|
0
|
3 Contributed by Hans-Peter Nilsson (hp@bitrange.com)
|
|
|
4
|
|
|
5 This file is part of GCC.
|
|
|
6
|
|
|
7 GCC is free software; you can redistribute it and/or modify
|
|
|
8 it under the terms of the GNU General Public License as published by
|
|
|
9 the Free Software Foundation; either version 3, or (at your option)
|
|
|
10 any later version.
|
|
|
11
|
|
|
12 GCC is distributed in the hope that it will be useful,
|
|
|
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
15 GNU General Public License for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along 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. */
|
|
|
34 CC_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. */
|
|
|
39 CC_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). */
|
|
|
44 CC_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. */
|
|
|
49 CC_MODE (CC_FUN);
|
