minix/lib/libc/arch/hppa/gen/fpsetmask.c

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/* $NetBSD: fpsetmask.c,v 1.5 2009/01/25 16:44:41 skrll Exp $ */
/* $OpenBSD: fpsetmask.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: fpsetmask.c,v 1.5 2009/01/25 16:44:41 skrll Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <ieeefp.h>
fp_except
fpsetmask(fp_except mask)
{
uint64_t fpsr;
fp_except old;
__asm volatile("fstd %%fr0,0(%1)" : "=m"(fpsr) : "r"(&fpsr) : "memory");
old = (fpsr >> 32) & 0x1f;
fpsr = (fpsr & 0xffffffe000000000LL) | ((uint64_t)(mask & 0x1f) << 32);
__asm volatile("fldd 0(%0),%%fr0" : : "r"(&fpsr) : "memory");
return (old);
}