/*      $OpenBSD: flt_rounds.c,v 1.6 2015/10/27 05:54:49 guenther Exp $ */

/*
 * Written by Miodrag Vallat.  Public domain.
 */

#include <sys/types.h>
#include <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()
{
        u_int64_t fpsr;

        __asm__ volatile("fstd %%fr0,0(%1)" : "=m" (fpsr) : "r" (&fpsr));
        return map[(fpsr >> 41) & 0x03];
}
DEF_STRONG(__flt_rounds);