31 lines
517 B
C
31 lines
517 B
C
|
/* $NetBSD: fpsetround.c,v 1.2 2002/01/13 21:45:51 thorpej Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Written by J.T. Conklin, Apr 10, 1995
|
||
|
|
* Public domain.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
__FBSDID("$FreeBSD$");
|
||
|
|
|
||
|
|
#include <machine/fsr.h>
|
||
|
|
#include <ieeefp.h>
|
||
|
|
|
||
|
|
fp_rnd_t
|
||
|
|
fpsetround(rnd_dir)
|
||
|
|
fp_rnd_t rnd_dir;
|
||
|
|
{
|
||
|
|
unsigned int old;
|
||
|
|
unsigned int new;
|
||
|
|
|
||
|
|
__asm__("st %%fsr,%0" : "=m" (old));
|
||
|
|
|
||
|
|
new = old;
|
||
|
|
new &= ~FSR_RD_MASK;
|
||
|
|
new |= FSR_RD((unsigned int)rnd_dir & 0x03);
|
||
|
|
|
||
|
|
__asm__("ld %0,%%fsr" : : "m" (new));
|
||
|
|
|
||
|
|
return ((fp_rnd_t)FSR_GET_RD(old));
|
||
|
|
}
|