1 /* sf_nearbyint.c -- define nearbyintf
2 Copyright (c) 2011, 2012 ARM Ltd. All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions
6 are met:
7 1. Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9 2. Redistributions in binary form must reproduce the above copyright
10 notice, this list of conditions and the following disclaimer in the
11 documentation and/or other materials provided with the distribution.
12 3. The name of the company may not be used to endorse or promote
13 products derived from this software without specific prior written
14 permission.
15
16 THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
26
27 #if __ARM_ARCH >= 8 && (__ARM_FP & 0x4) && !defined (__SOFTFP__)
28 #include <math.h>
29
30 float
nearbyintf(float x)31 nearbyintf (float x)
32 {
33 if (isnan(x)) return x + x;
34 #if defined(FE_INEXACT)
35 fenv_t env;
36 fegetenv(&env);
37 #endif
38 __asm__ volatile ("vrintr.f32\t%0, %1" : "=t" (x) : "t" (x));
39 #if defined(FE_INEXACT)
40 fesetenv(&env);
41 #endif
42 return x;
43 }
44
45 #else
46 #include "../../common/sf_nearbyint.c"
47 #endif
48
