1 /* $NetBSD: fpsetmask.c,v 1.6 2012/03/21 00:38:34 christos 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: fpsetmask.c,v 1.6 2012/03/21 00:38:34 christos Exp $"); 11 #endif /* LIBC_SCCS and not lint */ 12 13 #include "namespace.h" 14 15 #include <ieeefp.h> 16 17 #ifdef __weak_alias __weak_alias(fpsetmask,_fpsetmask)18__weak_alias(fpsetmask,_fpsetmask) 19 #endif 20 21 fp_except 22 fpsetmask(fp_except mask) 23 { 24 fp_except old; 25 fp_except new; 26 27 __asm("st %%fsr,%0" : "=m" (*&old)); 28 29 new = old; 30 new &= ~(0x1f << 23); 31 new |= ((mask & 0x1f) << 23); 32 33 __asm("ld %0,%%fsr" : : "m" (*&new)); 34 35 return (old >> 23) & 0x1f; 36 } 37