35 lines
663 B
C
35 lines
663 B
C
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/* $NetBSD: flt_rounds.c,v 1.6 2010/09/03 17:22:51 matt Exp $ */
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/*
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* Written by J.T. Conklin, Apr 11, 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: flt_rounds.c,v 1.6 2010/09/03 17:22:51 matt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <machine/float.h>
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#include <ieeefp.h>
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static const int map[] = {
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1, /* round to nearest */
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0, /* round to zero */
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2, /* round to positive infinity */
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3 /* round to negative infinity */
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};
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int
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__flt_rounds()
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{
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#ifdef SOFTFLOAT_FOR_GCC
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return map[fpgetround()];
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#else
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int x;
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__asm("cfc1\t%0,$31" : "=r" (x));
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return map[x & 0x03];
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#endif
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}
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