1/* $NetBSD: fpsetmask.c,v 1.4 2005/12/24 23:10:08 perry 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 1.4 2005/12/24 23:10:08 perry 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 22extern fp_except _softfloat_float_exception_mask; 23#endif 24 25fp_except 26fpsetmask(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