fpsetmask.c revision 1.2 
11.2Sperry/*	$NetBSD: fpsetmask.c,v 1.2 1998/01/09 03:15:17 perry Exp $	*/
21.2Sperry
31.1Sjtc/*
41.1Sjtc * Written by J.T. Conklin, Apr 10, 1995
51.1Sjtc * Public domain.
61.1Sjtc */
71.1Sjtc
81.1Sjtc#include <ieeefp.h>
91.1Sjtc
101.1Sjtcfp_except
111.1Sjtcfpsetmask(mask)
121.1Sjtc	fp_except mask;
131.1Sjtc{
141.1Sjtc	fp_except old;
151.1Sjtc	fp_except new;
161.1Sjtc
171.1Sjtc	__asm__("st %%fsr,%0" : "=m" (*&old));
181.1Sjtc
191.1Sjtc	new = old;
201.1Sjtc	new &= ~(0x1f << 23);
211.1Sjtc	new |= ((mask & 0x1f) << 23);
221.1Sjtc
231.1Sjtc	__asm__("ld %0,%%fsr" : : "m" (*&new));
241.1Sjtc
251.1Sjtc	return (old >> 23) & 0x1f;
261.1Sjtc}
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