1/* $NetBSD: fpsetround.c,v 1.5 2005/12/24 23:10:08 perry Exp $ */ 2 3/* 4 * Written by J.T. Conklin, Apr 11, 1995 5 * Public domain. 6 */ 7 8#include <sys/cdefs.h> 9__FBSDID("$FreeBSD$"); 10#if defined(LIBC_SCCS) && !defined(lint) 11__RCSID("$NetBSD: fpsetround.c,v 1.5 2005/12/24 23:10:08 perry Exp $"); 12#endif /* LIBC_SCCS and not lint */ 13 14#include "namespace.h" 15 16#include <ieeefp.h> 17 18#ifdef __weak_alias 19__weak_alias(fpsetround,_fpsetround) 20#endif 21 22fp_rnd_t 23fpsetround(fp_rnd_t rnd_dir) 24{ 25 fp_rnd_t old; 26 fp_rnd_t new; 27 28 __asm("cfc1 %0,$31" : "=r" (old)); 29 30 new = old; 31 new &= ~0x03; 32 new |= (rnd_dir & 0x03); 33 34 __asm("ctc1 %0,$31" : : "r" (new)); 35 36 return old & 0x03; 37} 38