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428d5830 | 1 | /* Round float to int floating-point values, sparc32 v9 version. |
04277e02 | 2 | Copyright (C) 2012-2019 Free Software Foundation, Inc. |
428d5830 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> | |
3e5efdbd | 21 | #include <libm-alias-float.h> |
428d5830 DM |
22 | |
23 | /* We pop constants into the FPU registers using the incoming | |
d674b76d DM |
24 | argument stack slots, since this avoid having to use any PIC |
25 | references. We also thus avoid having to allocate a register | |
26 | window. | |
27 | ||
28 | VIS instructions are used to facilitate the formation of | |
29 | easier constants, and the propagation of the sign bit. */ | |
428d5830 DM |
30 | |
31 | #define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ | |
32 | ||
33 | #define ZERO %f10 /* 0.0 */ | |
34 | #define SIGN_BIT %f12 /* -0.0 */ | |
35 | ||
36 | ENTRY (__rintf) | |
37 | st %o0, [%sp + 68] | |
38 | sethi %hi(TWO_TWENTYTHREE), %o2 | |
39 | fzeros ZERO | |
40 | ||
41 | ld [%sp + 68], %f1 | |
42 | fnegs ZERO, SIGN_BIT | |
43 | ||
44 | st %o2, [%sp + 68] | |
45 | fabss %f1, %f14 | |
46 | ||
47 | ld [%sp + 68], %f16 | |
48 | fcmps %fcc3, %f14, %f16 | |
49 | ||
50 | fmovsuge %fcc3, ZERO, %f16 | |
51 | fands %f1, SIGN_BIT, SIGN_BIT | |
52 | ||
53 | fors %f16, SIGN_BIT, %f16 | |
54 | fadds %f1, %f16, %f5 | |
55 | fsubs %f5, %f16, %f0 | |
56 | fabss %f0, %f0 | |
57 | retl | |
58 | fors %f0, SIGN_BIT, %f0 | |
59 | END (__rintf) | |
3e5efdbd | 60 | libm_alias_float (__rint, rint) |