root/lib/libc/i386/gen/flt_rounds.c
/*
 * Written by J.T. Conklin, Apr 10, 1995
 * Public domain.
 */

#include <float.h>

static const int map[] = {
        1,      /* round to nearest */
        3,      /* round to zero */
        2,      /* round to negative infinity */
        0       /* round to positive infinity */
};

int
__flt_rounds(void)
{
        int x;

        __asm("fnstcw %0" : "=m" (x));
        return (map[(x >> 10) & 0x03]);
}