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f1717362 | 1 | /* Copyright (C) 2010-2016 Free Software Foundation, Inc. |
283681bb | 2 | |
3 | This file is part of GCC. | |
4 | ||
5 | GCC is free software; you can redistribute it and/or modify it | |
6 | under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3, or (at your option) | |
8 | any later version. | |
9 | ||
10 | GCC is distributed in the hope that it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
12 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
13 | License for more details. | |
14 | ||
15 | Under Section 7 of GPL version 3, you are granted additional | |
16 | permissions described in the GCC Runtime Library Exception, version | |
17 | 3.1, as published by the Free Software Foundation. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | and a copy of the GCC Runtime Library Exception along with this | |
21 | program; see the files COPYING3 and COPYING.RUNTIME respectively. | |
22 | If not, see <http://www.gnu.org/licenses/>. */ | |
23 | ||
24 | #ifdef __mips_hard_float | |
25 | ||
26 | /* Flush denormalized numbers to zero. */ | |
27 | #define _FPU_FLUSH_TZ 0x1000000 | |
28 | ||
29 | /* Rounding control. */ | |
30 | #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ | |
31 | #define _FPU_RC_ZERO 0x1 | |
32 | #define _FPU_RC_UP 0x2 | |
33 | #define _FPU_RC_DOWN 0x3 | |
34 | ||
35 | /* Enable interrupts for IEEE exceptions. */ | |
36 | #define _FPU_IEEE 0x00000F80 | |
37 | ||
38 | /* Macros for accessing the hardware control word. */ | |
39 | #define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw)) | |
40 | #define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw)) | |
41 | ||
d36db932 | 42 | static void __attribute__((constructor,nomips16)) |
283681bb | 43 | set_fast_math (void) |
44 | { | |
45 | unsigned int fcr; | |
46 | ||
47 | /* Flush to zero, round to nearest, IEEE exceptions disabled. */ | |
48 | fcr = _FPU_FLUSH_TZ | _FPU_RC_NEAREST; | |
49 | ||
50 | _FPU_SETCW(fcr); | |
51 | } | |
52 | ||
53 | #endif /* __mips_hard_float */ |