38 lines
668 B
C
38 lines
668 B
C
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/* $NetBSD: fpsetmask.c,v 1.4 2005/12/24 23:10:08 perry Exp $ */
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/*
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* Written by J.T. Conklin, Apr 10, 1995
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* Public domain.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: fpsetmask.c,v 1.4 2005/12/24 23:10:08 perry Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <ieeefp.h>
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#ifdef __weak_alias
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__weak_alias(fpsetmask,_fpsetmask)
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#endif
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fp_except
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fpsetmask(mask)
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fp_except mask;
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{
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fp_except old;
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fp_except new;
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__asm("st %%fsr,%0" : "=m" (*&old));
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new = old;
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new &= ~(0x1f << 23);
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new |= ((mask & 0x1f) << 23);
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__asm("ld %0,%%fsr" : : "m" (*&new));
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return (old >> 23) & 0x1f;
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}
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