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

50 lines
954 B
C
Raw Normal View History

/* $NetBSD: fpsetmask.c,v 1.7 2013/10/28 01:06:36 mrg Exp $ */
/*
* Written by J.T. Conklin, Apr 10, 1995
* Public domain.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fpsetmask.c,v 1.7 2013/10/28 01:06:36 mrg Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/types.h>
#include <ieeefp.h>
#ifdef __weak_alias
__weak_alias(fpsetmask,_fpsetmask)
#endif
#ifdef EXCEPTIONS_WITH_SOFTFLOAT
extern fp_except _softfloat_float_exception_mask;
#endif
fp_except
fpsetmask(fp_except mask)
{
fp_except old;
fp_except new;
__asm("st %%fsr,%0" : "=m" (*&old));
new = old;
new &= ~(0x1f << 23);
new |= ((mask & 0x1f) << 23);
__asm("ld %0,%%fsr" : : "m" (*&new));
old = ((uint32_t)old >> 23) & 0x1f;
#ifdef EXCEPTIONS_WITH_SOFTFLOAT
/* update softfloat mask as well */
old |= _softfloat_float_exception_mask;
_softfloat_float_exception_mask = mask;
#endif
return old;
}