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559398ab | 1 | /* llrintf(), sparc32 v9 vis3 version. |
688903eb | 2 | Copyright (C) 2012-2018 Free Software Foundation, Inc. |
559398ab DM |
3 | This file is part of the GNU C Library. |
4 | Contributed by David S. Miller <davem@davemloft.net>, 2012. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <sysdep.h> | |
21 | ||
22 | /* VIS instructions are used to facilitate the formation of | |
23 | easier constants, and the propagation of the sign bit. */ | |
24 | ||
25 | #define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ | |
26 | ||
27 | #define ZERO %f10 /* 0.0 */ | |
28 | #define SIGN_BIT %f12 /* -0.0 */ | |
29 | ||
30 | ENTRY (__llrintf_vis3) | |
31 | movwtos %o0, %f1 | |
32 | sethi %hi(TWO_TWENTYTHREE), %o2 | |
33 | fzeros ZERO | |
34 | ||
35 | fnegs ZERO, SIGN_BIT | |
36 | ||
37 | movwtos %o2, %f16 | |
38 | fabss %f1, %f14 | |
39 | ||
40 | fcmps %fcc3, %f14, %f16 | |
41 | ||
42 | fmovsuge %fcc3, ZERO, %f16 | |
43 | fands %f1, SIGN_BIT, SIGN_BIT | |
44 | ||
45 | fors %f16, SIGN_BIT, %f16 | |
46 | fadds %f1, %f16, %f5 | |
47 | fsubs %f5, %f16, %f0 | |
48 | fabss %f0, %f0 | |
49 | fors %f0, SIGN_BIT, %f0 | |
50 | fstox %f0, %f4 | |
51 | movstouw %f4, %o0 | |
52 | retl | |
53 | movstouw %f5, %o1 | |
54 | END (__llrintf_vis3) |