fpsetround.c revision 1.2 
11.2Sthorpej/*	$NetBSD: fpsetround.c,v 1.2 2002/01/13 21:45:51 thorpej Exp $	*/
21.1Seeh
31.1Seeh/*
41.1Seeh * Written by J.T. Conklin, Apr 10, 1995
51.1Seeh * Public domain.
61.1Seeh */
71.1Seeh
81.2Sthorpej#include <sys/cdefs.h>
91.2Sthorpej
101.2Sthorpej#include "namespace.h"
111.2Sthorpej
121.1Seeh#include <ieeefp.h>
131.2Sthorpej
141.2Sthorpej#ifdef __weak_alias
151.2Sthorpej__weak_alias(fpsetround,_fpsetround)
161.2Sthorpej#endif
171.1Seeh
181.1Seehfp_rnd
191.1Seehfpsetround(rnd_dir)
201.1Seeh	fp_rnd rnd_dir;
211.1Seeh{
221.1Seeh	fp_rnd old;
231.1Seeh	fp_rnd new;
241.1Seeh
251.1Seeh	__asm__("st %%fsr,%0" : "=m" (*&old));
261.1Seeh
271.1Seeh	new = old;
281.1Seeh	new &= ~(0x03 << 30);
291.1Seeh	new |= ((rnd_dir & 0x03) << 30);
301.1Seeh
311.1Seeh	__asm__("ld %0,%%fsr" : : "m" (*&new));
321.1Seeh
331.1Seeh	return (old >> 30) & 0x03;
341.1Seeh}
35