1 /* $NetBSD: fpsetround.c,v 1.3 2002/01/13 21:45:49 thorpej Exp $ */ 2 3 /* 4 * Written by J.T. Conklin, Apr 10, 1995 5 * Public domain. 6 */ 7 8 #include <sys/cdefs.h> 9 10 #include "namespace.h" 11 12 #include <ieeefp.h> 13 14 #ifdef __weak_alias 15 __weak_alias(fpsetround,_fpsetround) 16 #endif 17 18 fp_rnd 19 fpsetround(rnd_dir) 20 fp_rnd rnd_dir; 21 { 22 fp_rnd old; 23 fp_rnd new; 24 25 __asm__("st %%fsr,%0" : "=m" (*&old)); 26 27 new = old; 28 new &= ~(0x03 << 30); 29 new |= ((rnd_dir & 0x03) << 30); 30 31 __asm__("ld %0,%%fsr" : : "m" (*&new)); 32 33 return (old >> 30) & 0x03; 34 } 35