38 lines
670 B
C
38 lines
670 B
C
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/* $NetBSD: fpsetround.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: fpsetround.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(fpsetround,_fpsetround)
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#endif
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fp_rnd
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fpsetround(rnd_dir)
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fp_rnd rnd_dir;
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{
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fp_rnd old;
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fp_rnd new;
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__asm("st %%fsr,%0" : "=m" (*&old));
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new = old;
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new &= ~(0x03 << 30);
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new |= ((rnd_dir & 0x03) << 30);
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__asm("ld %0,%%fsr" : : "m" (*&new));
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return (old >> 30) & 0x03;
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}
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