1/*	$OpenBSD: fpsetmask.c,v 1.6 2023/01/27 11:25:16 miod Exp $	*/
2
3/*
4 * Written by Miodrag Vallat.  Public domain
5 */
6
7#include <sys/types.h>
8#include <ieeefp.h>
9
10fp_except
11fpsetmask(mask)
12	fp_except mask;
13{
14	u_int64_t fpsr;
15	fp_except old;
16
17	__asm__ volatile("fstd %%fr0,0(%1)" : "=m"(fpsr) : "r"(&fpsr));
18	old = (fpsr >> 32) & 0x1f;
19	fpsr = (fpsr & 0xffffffe000000000LL) | ((u_int64_t)(mask & 0x1f) << 32);
20	__asm__ volatile("fldd 0(%0),%%fr0" : : "r"(&fpsr), "m"(fpsr));
21	return (old);
22}
23