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559398ab | 1 | /* llrint(), sparc32 v9 vis3 version. |
dff8da6b | 2 | Copyright (C) 2012-2024 Free Software Foundation, Inc. |
559398ab | 3 | This file is part of the GNU C Library. |
559398ab DM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
559398ab DM |
18 | |
19 | #include <sysdep.h> | |
20 | ||
21 | /* VIS instructions are used to facilitate the formation of | |
22 | easier constants, and the propagation of the sign bit. */ | |
23 | ||
24 | #define TWO_FIFTYTWO 0x43300000 /* 2**52 */ | |
25 | ||
26 | #define ZERO %f10 /* 0.0 */ | |
27 | #define SIGN_BIT %f12 /* -0.0 */ | |
28 | ||
29 | ENTRY (__llrint_vis3) | |
30 | sethi %hi(TWO_FIFTYTWO), %o2 | |
31 | sllx %o0, 32, %o0 | |
32 | ||
33 | or %o0, %o1, %o0 | |
34 | fzero ZERO | |
35 | ||
36 | movxtod %o0, %f0 | |
37 | sllx %o2, 32, %o2 | |
38 | fnegd ZERO, SIGN_BIT | |
39 | ||
40 | movxtod %o2, %f16 | |
41 | fabsd %f0, %f14 | |
42 | ||
43 | fcmpd %fcc3, %f14, %f16 | |
44 | ||
45 | fmovduge %fcc3, ZERO, %f16 | |
46 | fand %f0, SIGN_BIT, SIGN_BIT | |
47 | ||
48 | for %f16, SIGN_BIT, %f16 | |
49 | faddd %f0, %f16, %f6 | |
50 | fsubd %f6, %f16, %f0 | |
51 | fabsd %f0, %f0 | |
52 | for %f0, SIGN_BIT, %f0 | |
53 | fdtox %f0, %f4 | |
54 | movstouw %f4, %o0 | |
55 | retl | |
56 | movstouw %f5, %o1 | |
57 | END (__llrint_vis3) |