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1caca546 | 1 | /* |
f1717362 | 2 | * Copyright (C) 2012-2016 Free Software Foundation, Inc. |
1caca546 | 3 | * |
4 | * This file is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 3, or (at your option) any | |
7 | * later version. | |
8 | * | |
9 | * This file is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * Under Section 7 of GPL version 3, you are granted additional | |
15 | * permissions described in the GCC Runtime Library Exception, version | |
16 | * 3.1, as published by the Free Software Foundation. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License and | |
19 | * a copy of the GCC Runtime Library Exception along with this program; | |
20 | * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
21 | * <http://www.gnu.org/licenses/>. | |
22 | */ | |
23 | ||
24 | #include "sfp-machine.h" | |
25 | ||
26 | void | |
27 | __sfp_handle_exceptions (int _fex) | |
28 | { | |
29 | const float fp_max = __FLT_MAX__; | |
30 | const float fp_min = __FLT_MIN__; | |
31 | const float fp_1e32 = 1.0e32f; | |
32 | const float fp_zero = 0.0; | |
33 | const float fp_one = 1.0; | |
34 | unsigned fpsr; | |
35 | ||
36 | if (_fex & FP_EX_INVALID) | |
37 | { | |
38 | __asm__ __volatile__ ("fdiv\ts0, %s0, %s0" | |
39 | : | |
40 | : "w" (fp_zero) | |
41 | : "s0"); | |
42 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); | |
43 | } | |
44 | if (_fex & FP_EX_DIVZERO) | |
45 | { | |
46 | __asm__ __volatile__ ("fdiv\ts0, %s0, %s1" | |
47 | : | |
48 | : "w" (fp_one), "w" (fp_zero) | |
49 | : "s0"); | |
50 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); | |
51 | } | |
52 | if (_fex & FP_EX_OVERFLOW) | |
53 | { | |
54 | __asm__ __volatile__ ("fadd\ts0, %s0, %s1" | |
55 | : | |
56 | : "w" (fp_max), "w" (fp_1e32) | |
57 | : "s0"); | |
58 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); | |
59 | } | |
60 | if (_fex & FP_EX_UNDERFLOW) | |
61 | { | |
62 | __asm__ __volatile__ ("fmul\ts0, %s0, %s0" | |
63 | : | |
64 | : "w" (fp_min) | |
65 | : "s0"); | |
66 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); | |
67 | } | |
68 | if (_fex & FP_EX_INEXACT) | |
69 | { | |
70 | __asm__ __volatile__ ("fsub\ts0, %s0, %s1" | |
71 | : | |
72 | : "w" (fp_max), "w" (fp_one) | |
73 | : "s0"); | |
74 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); | |
75 | } | |
76 | } |