1 | /* Total order operation. flt-32 version. |
2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <math.h> |
20 | #include <math_private.h> |
21 | #include <libm-alias-float.h> |
22 | #include <nan-high-order-bit.h> |
23 | #include <stdint.h> |
24 | |
25 | int |
26 | __totalorderf (float x, float y) |
27 | { |
28 | int32_t ix, iy; |
29 | GET_FLOAT_WORD (ix, x); |
30 | GET_FLOAT_WORD (iy, y); |
31 | #if HIGH_ORDER_BIT_IS_SET_FOR_SNAN |
32 | /* For the preferred quiet NaN convention, this operation is a |
33 | comparison of the representations of the arguments interpreted as |
34 | sign-magnitude integers. If both arguments are NaNs, invert the |
35 | quiet/signaling bit so comparing that way works. */ |
36 | if ((ix & 0x7fffffff) > 0x7f800000 && (iy & 0x7fffffff) > 0x7f800000) |
37 | { |
38 | ix ^= 0x00400000; |
39 | iy ^= 0x00400000; |
40 | } |
41 | #endif |
42 | uint32_t ix_sign = ix >> 31; |
43 | uint32_t iy_sign = iy >> 31; |
44 | ix ^= ix_sign >> 1; |
45 | iy ^= iy_sign >> 1; |
46 | return ix <= iy; |
47 | } |
48 | libm_alias_float (__totalorder, totalorder) |
49 | |