1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* Definitions of target machine for GNU compiler, for MMIX.
Copyright (C) 2002-2014 Free Software Foundation, Inc.
Contributed by Hans-Peter Nilsson (hp@bitrange.com)
This file is part of GCC.
GCC 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 3, or (at your option)
any later version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Node: Condition Code */
/* Like other non-CC0 ports, MMIX need to code which combination of
comparison insn and branch insn or conditional-set insn to use into the
condition mode. The CC mode depends partly on which condition is used
and partly on the type of the operands. */
/* The "usual" CC mode is used for a signed operands integer comparison,
where the CMP insn is used and the result is (integer) -1, 0 or 1 for
respectively a < b, a == b and a > b. */
/* The CC_UNS mode is for an unsigned operands integer comparison using
the CMPU insn. Result values correspond to those in CCmode. */
CC_MODE (CC_UNS);
/* The CC_FP mode is for a non-equality floating-point comparison, using
the FCMP or FCMPE insn. The result is (integer) -1 or 1 for
respectively a < b and a > b, otherwise 0. */
CC_MODE (CC_FP);
/* The CC_FPEQ mode is for an equality floating-point comparison, using
the FEQL or FEQLE insn. The result is (integer) 1 for a == b,
otherwise 0 (including NaN:s). */
CC_MODE (CC_FPEQ);
/* The CC_FUN mode is for an ordering comparison, using the FUN or FUNE
insn. The result is (integer) 1 if a is unordered to b, otherwise the
result is 0. */
CC_MODE (CC_FUN);
|
