fpsetround.c revision 1.4
1/* $NetBSD: fpsetround.c,v 1.4 2005/12/24 23:10:08 perry Exp $ */ 2 3/* 4 * Written by J.T. Conklin, Apr 10, 1995 5 * Public domain. 6 */ 7 8#include <sys/cdefs.h> 9#if defined(LIBC_SCCS) && !defined(lint) 10__RCSID("$NetBSD: fpsetround.c,v 1.4 2005/12/24 23:10:08 perry Exp $"); 11#endif /* LIBC_SCCS and not lint */ 12 13#include "namespace.h" 14 15#include <ieeefp.h> 16 17#ifdef __weak_alias 18__weak_alias(fpsetround,_fpsetround) 19#endif 20 21fp_rnd 22fpsetround(rnd_dir) 23 fp_rnd rnd_dir; 24{ 25 fp_rnd old; 26 fp_rnd new; 27 28 __asm("st %%fsr,%0" : "=m" (*&old)); 29 30 new = old; 31 new &= ~(0x03 << 30); 32 new |= ((rnd_dir & 0x03) << 30); 33 34 __asm("ld %0,%%fsr" : : "m" (*&new)); 35 36 return (old >> 30) & 0x03; 37} 38