1 /* $NetBSD: fpsetmask.c,v 1.5 2011/03/06 10:32:47 martin 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 1.5 2011/03/06 10:32:47 martin 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(fpsetmask,_fpsetmask) 19 #endif 20 21 #ifdef EXCEPTIONS_WITH_SOFTFLOAT 22 extern fp_except _softfloat_float_exception_mask; 23 #endif 24 25 fp_except 26 fpsetmask(mask) 27 fp_except mask; 28 { 29 fp_except old; 30 fp_except new; 31 32 __asm("st %%fsr,%0" : "=m" (*&old)); 33 34 new = old; 35 new &= ~(0x1f << 23); 36 new |= ((mask & 0x1f) << 23); 37 38 __asm("ld %0,%%fsr" : : "m" (*&new)); 39 40 old = (old >> 23) & 0x1f; 41 42 #ifdef EXCEPTIONS_WITH_SOFTFLOAT 43 /* update softfloat mask as well */ 44 old |= _softfloat_float_exception_mask; 45 _softfloat_float_exception_mask = mask; 46 #endif 47 48 return old; 49 } 50