fpsetmask.c revision 1.6 
11.6Smatt/*	$NetBSD: fpsetmask.c,v 1.6 2012/03/19 22:23:10 matt 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>
91.4Slukem#if defined(LIBC_SCCS) && !defined(lint)
101.6Smatt__RCSID("$NetBSD: fpsetmask.c,v 1.6 2012/03/19 22:23:10 matt Exp $");
111.4Slukem#endif /* LIBC_SCCS and not lint */
121.3Sthorpej
131.3Sthorpej#include "namespace.h"
141.3Sthorpej
151.1Sjtc#include <ieeefp.h>
161.3Sthorpej
171.3Sthorpej#ifdef __weak_alias
181.3Sthorpej__weak_alias(fpsetmask,_fpsetmask)
191.3Sthorpej#endif
201.1Sjtc
211.1Sjtcfp_except
221.6Smattfpsetmask(fp_except mask)
231.1Sjtc{
241.1Sjtc	fp_except old;
251.1Sjtc	fp_except new;
261.1Sjtc
271.5Sperry	__asm("cfc1 %0,$31" : "=r" (old));
281.1Sjtc
291.6Smatt	new = old & ~(0x1f << 7);
301.1Sjtc	new |= ((mask & 0x1f) << 7);
311.1Sjtc
321.5Sperry	__asm("ctc1 %0,$31" : : "r" (new));
331.1Sjtc
341.1Sjtc	return (old >> 7) & 0x1f;
351.1Sjtc}
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