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36 lines
787 B
C
36 lines
787 B
C
/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Change for long double by Jakub Jelinek <jj@ultra.linux.cz>
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* Public domain.
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/*
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* isinfl(x) returns 1 if x is inf, -1 if 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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#include <math_ldbl_opt.h>
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int
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___isinfl (long double x)
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{
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int64_t hx,lx;
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GET_LDOUBLE_WORDS64(hx,lx,x);
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lx = (lx & 0x7fffffffffffffffLL);
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lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7ff0000000000000LL;
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lx |= -lx;
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return ~(lx >> 63) & (hx >> 62);
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}
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hidden_ver (___isinfl, __isinfl)
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#ifndef IS_IN_libm
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weak_alias (___isinfl, ____isinfl)
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long_double_symbol (libc, ___isinfl, isinfl);
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long_double_symbol (libc, ____isinfl, __isinfl);
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#endif
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