freebsd-dev/lib/libc/sparc64/gen/fpsetround.c
Thomas Moestl 8579151e4b Add implementations of fpgetmask(), fpgetround(), fpgetsticky(),
fpsetround(), fpsetsticky(), obtained from NetBSD and tweaked a little
to use definitions from machine/fsr.h instead of magic numbers.
2002-09-14 18:06:21 +00:00

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));
}