Mercurial > hg > CbC > CbC_gcc
comparison gcc/config/mmix/mmix-modes.def @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
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children | 04ced10e8804 |
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1 /* Definitions of target machine for GNU compiler, for MMIX. | |
2 Copyright (C) 2002, 2004, 2007 Free Software Foundation, Inc. | |
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); |