28 lines
443 B
C
28 lines
443 B
C
/*
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* Written by J.T. Conklin <jtc@NetBSD.org>.
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* Public domain.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: s_isinff.c,v 1.6 2003/07/26 19:25:06 salo Exp $");
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#endif
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/*
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* isinff(x) returns 1 is x is inf, else 0;
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* no branching!
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*/
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#include "math.h"
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#include "math_private.h"
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int
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isinff(float x)
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{
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int32_t ix;
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GET_FLOAT_WORD(ix,x);
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ix &= 0x7fffffff;
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ix ^= 0x7f800000;
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return (ix == 0);
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}
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