[dragonfly.git] / lib / libc / x86_64 / 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;

        /* Assume that the x87 and the SSE unit agree on the rounding mode. */
	__asm("fnstcw %0" : "=m" (x));
        return (map[(x >> 10) & 0x03]);
}
Commit	Line	Data
05ecdcef SS	1	/*
	2	* Written by J.T. Conklin, Apr 10, 1995
	3	* Public domain.
05ecdcef SS	4	*/
05ecdcef SS	5
05ecdcef SS	6	#include <float.h>
	7
	8	static const int map[] = {
	9	1, /* round to nearest */
	10	3, /* round to zero */
	11	2, /* round to negative infinity */
	12	0 /* round to positive infinity */
	13	};
	14
	15	int
	16	__flt_rounds(void)
	17	{
	18	int x;
	19
	20	/* Assume that the x87 and the SSE unit agree on the rounding mode. */
	21	__asm("fnstcw %0" : "=m" (x));
	22	return (map[(x >> 10) & 0x03]);
	23	}