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fpsetsticky.c revision 1.5 
      1 /*	$NetBSD: fpsetsticky.c,v 1.5 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: fpsetsticky.c,v 1.5 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(fpsetsticky,_fpsetsticky)
     19 #endif
     20 
     21 fp_except
     22 fpsetsticky(sticky)
     23 	fp_except sticky;
     24 {
     25 	fp_except old;
     26 	fp_except new;
     27 
     28 	__asm("st %%fsr,%0" : "=m" (*&old));
     29 
     30 	new = old;
     31 	new &= ~(0x1f << 5);
     32 	new |= ((sticky & 0x1f) << 5);
     33 
     34 	__asm("ld %0,%%fsr" : : "m" (*&new));
     35 
     36 	return (old >> 5) & 0x1f;
     37 }
     38