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6358490d | 1 | /* lrintf(), sparc64 version. |
2b778ceb | 2 | Copyright (C) 2012-2021 Free Software Foundation, Inc. |
6358490d | 3 | This file is part of the GNU C Library. |
6358490d 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/>. */ |
6358490d DM |
18 | |
19 | #include <sysdep.h> | |
3e5efdbd | 20 | #include <libm-alias-float.h> |
6358490d DM |
21 | |
22 | /* We pop constants into the FPU registers using the incoming | |
23 | argument stack slots, since this avoid having to use any PIC | |
24 | references. We also thus avoid having to allocate a register | |
25 | window. | |
26 | ||
27 | VIS instructions are used to facilitate the formation of | |
28 | easier constants, and the propagation of the sign bit. */ | |
29 | ||
30 | #define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ | |
31 | ||
32 | #define ZERO %f10 /* 0.0 */ | |
33 | #define SIGN_BIT %f12 /* -0.0 */ | |
34 | ||
35 | ENTRY (__lrintf) | |
36 | sethi %hi(TWO_TWENTYTHREE), %o2 | |
37 | fzeros ZERO | |
38 | ||
39 | fnegs ZERO, SIGN_BIT | |
40 | st %o2, [%sp + STACK_BIAS + 128] | |
41 | fabss %f1, %f14 | |
42 | ||
43 | ld [%sp + STACK_BIAS + 128], %f16 | |
44 | fcmps %fcc3, %f14, %f16 | |
45 | ||
46 | fmovsuge %fcc3, ZERO, %f16 | |
47 | fands %f1, SIGN_BIT, SIGN_BIT | |
48 | ||
49 | fors %f16, SIGN_BIT, %f16 | |
50 | fadds %f1, %f16, %f5 | |
51 | fsubs %f5, %f16, %f0 | |
52 | fabss %f0, %f0 | |
53 | fors %f0, SIGN_BIT, %f0 | |
54 | fstox %f0, %f4 | |
55 | std %f4, [%sp + STACK_BIAS + 128] | |
56 | retl | |
57 | ldx [%sp + STACK_BIAS + 128], %o0 | |
58 | END (__lrintf) | |
3e5efdbd | 59 | libm_alias_float (__lrint, lrint) |
6358490d DM |
60 | |
61 | strong_alias (__lrintf, __llrintf) | |
3e5efdbd | 62 | libm_alias_float (__llrint, llrint) |