[dragonfly.git] / lib / libc / x86_64 / gen / flt_rounds.c

/*
 * Written by J.T. Conklin, Apr 10, 1995
 * Public domain.
 */

#include <sys/cdefs.h>

#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	*/
	5
	6	#include <sys/cdefs.h>
	7
	8	#include <float.h>
	9
	10	static const int map[] = {
	11	1, /* round to nearest */
	12	3, /* round to zero */
	13	2, /* round to negative infinity */
	14	0 /* round to positive infinity */
	15	};
	16
	17	int
	18	__flt_rounds(void)
	19	{
	20	int x;
	21
	22	/* Assume that the x87 and the SSE unit agree on the rounding mode. */
	23	__asm("fnstcw %0" : "=m" (x));
	24	return (map[(x >> 10) & 0x03]);
	25	}