blob: bc92959feae1dd35da21080b3745a5decdfd82dd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
/* $OpenBSD: fpsetmask.c,v 1.2 2014/04/18 15:09:52 guenther Exp $ */
/*
* Written by Miodrag Vallat. Public domain
*/
#include <sys/types.h>
#include <ieeefp.h>
fp_except
fpsetmask(mask)
fp_except mask;
{
u_int64_t fpsr;
fp_except old;
__asm__ volatile("fstd %%fr0,0(%1)" : "=m"(fpsr) : "r"(&fpsr));
old = (fpsr >> 32) & 0x1f;
fpsr = (fpsr & 0xffffffe000000000LL) | ((u_int64_t)(mask & 0x1f) << 32);
__asm__ volatile("fldd 0(%0),%%fr0" : : "r"(&fpsr));
return (old);
}
|
