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

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/* $NetBSD: flt_rounds.c,v 1.6 2012/06/24 15:26:02 christos Exp $ */
/*
* Written by J.T. Conklin, Apr 10, 1995
* Public domain.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: flt_rounds.c,v 1.6 2012/06/24 15:26:02 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <machine/float.h>
static const int map[] = {
1, /* round to nearest */
0, /* round to zero */
2, /* round to positive infinity */
3 /* round to negative infinity */
};
int
__flt_rounds(void)
{
uint32_t x;
__asm("st %%fsr,%0" : "=m" (*&x));
return map[(x >> 30) & 0x03];
}