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f10eff58 DJ |
1 | /* Set the FPU control word. |
2 | Copyright (C) 1996, 1997, 1999, 2005 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 | |
ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
f10eff58 DJ |
18 | |
19 | #include <math.h> | |
20 | #include <fpu_control.h> | |
21 | ||
22 | #include <unistd.h> | |
23 | #include <ldsodefs.h> | |
24 | #include <dl-procinfo.h> | |
b610dc84 | 25 | #include <sysdep.h> |
f10eff58 DJ |
26 | |
27 | void | |
28 | __setfpucw (fpu_control_t set) | |
29 | { | |
b610dc84 | 30 | if (GLRO (dl_hwcap) & HWCAP_ARM_VFP) |
f10eff58 DJ |
31 | { |
32 | fpu_control_t cw; | |
33 | ||
34 | /* Fetch the current control word. */ | |
35 | _FPU_GETCW (cw); | |
36 | ||
37 | /* Preserve the reserved bits, and set the rest as the user | |
38 | specified (or the default, if the user gave zero). */ | |
39 | cw &= _FPU_RESERVED; | |
40 | cw |= set & ~_FPU_RESERVED; | |
41 | ||
42 | _FPU_SETCW (cw); | |
43 | } | |
44 | ||
45 | /* Do nothing if a VFP unit isn't present. */ | |
46 | } |