blob: a5133c7502ccad281c1387a41592a31bce728bdb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
/* $OpenBSD: flt_rounds.c,v 1.4 2012/06/25 17:01:10 deraadt Exp $ */
/*
* Written by Miodrag Vallat. Public domain.
*/
#include <sys/types.h>
#include <float.h>
static const int map[] = {
1, /* round to nearest */
0, /* round to zero */
2, /* round to positive infinity */
3 /* round to negative infinity */
};
int
__flt_rounds()
{
u_int64_t fpsr;
__asm__ __volatile__("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr));
return map[(fpsr >> 41) & 0x03];
}
|
