minix/lib/libc/arch/sparc64/gen/fpsetsticky.c

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/* $NetBSD: fpsetsticky.c,v 1.6 2012/03/17 21:35:06 martin Exp $ */
/*
* Written by J.T. Conklin, Apr 10, 1995
* Public domain.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fpsetsticky.c,v 1.6 2012/03/17 21:35:06 martin Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/types.h>
#include <ieeefp.h>
#ifdef __weak_alias
__weak_alias(fpsetsticky,_fpsetsticky)
#endif
#ifdef EXCEPTIONS_WITH_SOFTFLOAT
extern fp_except _softfloat_float_exception_flags;
#endif
fp_except
fpsetsticky(sticky)
fp_except sticky;
{
fp_except old;
fp_except new;
__asm("st %%fsr,%0" : "=m" (*&old));
new = old;
new &= ~(0x1f << 5);
new |= ((sticky & 0x1f) << 5);
__asm("ld %0,%%fsr" : : "m" (*&new));
old = ((uint32_t)old >> 5) & 0x1f;
#ifdef EXCEPTIONS_WITH_SOFTFLOAT
old |= _softfloat_float_exception_flags;
_softfloat_float_exception_flags = sticky;
#endif
return old;
}