fpsetmask.c revision 1.3 
11.3Sthorpej/*	$NetBSD: fpsetmask.c,v 1.3 2002/01/13 21:45:45 thorpej Exp $	*/
21.2Sjonathan
31.1Sjtc/*
41.1Sjtc * Written by J.T. Conklin, Apr 11, 1995
51.1Sjtc * Public domain.
61.1Sjtc */
71.1Sjtc
81.3Sthorpej#include <sys/cdefs.h>
91.3Sthorpej
101.3Sthorpej#include "namespace.h"
111.3Sthorpej
121.1Sjtc#include <ieeefp.h>
131.3Sthorpej
141.3Sthorpej#ifdef __weak_alias
151.3Sthorpej__weak_alias(fpsetmask,_fpsetmask)
161.3Sthorpej#endif
171.1Sjtc
181.1Sjtcfp_except
191.1Sjtcfpsetmask(mask)
201.1Sjtc	fp_except mask;
211.1Sjtc{
221.1Sjtc	fp_except old;
231.1Sjtc	fp_except new;
241.1Sjtc
251.1Sjtc	__asm__("cfc1 %0,$31" : "=r" (old));
261.1Sjtc
271.1Sjtc	new = old;
281.1Sjtc	new &= ~(0x1f << 7);
291.1Sjtc	new |= ((mask & 0x1f) << 7);
301.1Sjtc
311.1Sjtc	__asm__("ctc1 %0,$31" : : "r" (new));
321.1Sjtc
331.1Sjtc	return (old >> 7) & 0x1f;
341.1Sjtc}
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