44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/*
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* finite(x) returns 1 is x is finite, 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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#include <ldbl-classify-compat.h>
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#include <shlib-compat.h>
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#include <stdint.h>
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int
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__finite (double x)
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{
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int64_t lx;
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EXTRACT_WORDS64 (lx,x);
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return (int)((uint64_t)((lx & INT64_C(0x7ff0000000000000))
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- INT64_C (0x7ff0000000000000)) >> 63);
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}
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hidden_def (__finite)
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weak_alias (__finite, finite)
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#ifdef NO_LONG_DOUBLE
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# if LDBL_CLASSIFY_COMPAT
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# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23)
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compat_symbol (libc, __finite, __finitel, GLIBC_2_0);
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# endif
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# if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_23)
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compat_symbol (libm, __finite, __finitel, GLIBC_2_1);
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# endif
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# endif
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weak_alias (__finite, finitel)
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#endif
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