1 /* $NetBSD: fpsetsticky.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: fpsetsticky.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(fpsetsticky,_fpsetsticky) 19 #endif 20 21 #ifdef EXCEPTIONS_WITH_SOFTFLOAT 22 extern fp_except _softfloat_float_exception_flags; 23 #endif 24 25 fp_except 26 fpsetsticky(sticky) 27 fp_except sticky; 28 { 29 fp_except old; 30 fp_except new; 31 32 __asm("st %%fsr,%0" : "=m" (*&old)); 33 34 new = old; 35 new &= ~(0x1f << 5); 36 new |= ((sticky & 0x1f) << 5); 37 38 __asm("ld %0,%%fsr" : : "m" (*&new)); 39 40 old = (old >> 5) & 0x1f; 41 42 #ifdef EXCEPTIONS_WITH_SOFTFLOAT 43 old |= _softfloat_float_exception_flags; 44 _softfloat_float_exception_flags = sticky; 45 #endif 46 return old; 47 } 48