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/* $NetBSD: fpsetsticky.c,v 1.6 2012/03/23 09:34:09 skrll Exp $ */
/* $OpenBSD: fpsetsticky.c,v 1.4 2004/01/05 06:06:16 otto Exp $ */
/*
* Written by Miodrag Vallat. Public domain
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fpsetsticky.c,v 1.6 2012/03/23 09:34:09 skrll Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <ieeefp.h>
fp_except
fpsetsticky(fp_except mask)
{
uint64_t fpsr;
fp_except old;
__asm volatile("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr) : "memory");
old = (fp_except)(fpsr >> 59) & 0x1f;
fpsr = (fpsr & 0x07ffffff00000000LL) | ((uint64_t)(mask & 0x1f) << 59);
__asm volatile("fldd 0(%0),%%fr0" : : "r" (&fpsr) : "memory");
return (old);
}
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