| 1 | /* w_expl.c -- long double version of w_exp.c. |
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| 2 | */ |
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| 3 | |
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| 4 | /* |
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| 5 | * ==================================================== |
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| 6 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 7 | * |
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| 8 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 9 | * Permission to use, copy, modify, and distribute this |
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| 10 | * software is freely granted, provided that this notice |
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| 11 | * is preserved. |
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| 12 | * ==================================================== |
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| 13 | */ |
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| 14 | |
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| 15 | #if defined(LIBM_SCCS) && !defined(lint) |
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| 16 | static char rcsid[] = "$NetBSD: $" ; |
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| 17 | #endif |
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| 18 | |
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| 19 | /* |
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| 20 | * wrapper expl(x) |
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| 21 | */ |
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| 22 | |
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| 23 | #include <math.h> |
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| 24 | #include <math_private.h> |
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| 25 | #include <math-svid-compat.h> |
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| 26 | #include <libm-alias-ldouble.h> |
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| 27 | |
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| 28 | #if LIBM_SVID_COMPAT |
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| 29 | long double __expl(long double x) /* wrapper exp */ |
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| 30 | { |
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| 31 | # ifdef _IEEE_LIBM |
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| 32 | return __ieee754_expl(x); |
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| 33 | # else |
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| 34 | long double z = __ieee754_expl (x); |
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| 35 | if (__glibc_unlikely (!isfinite (z) || z == 0) |
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| 36 | && isfinite (x) && _LIB_VERSION != _IEEE_) |
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| 37 | return __kernel_standard_l (x, x, 206 + !!signbit (x)); |
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| 38 | |
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| 39 | return z; |
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| 40 | # endif |
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| 41 | } |
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| 42 | libm_hidden_def (__expl) |
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| 43 | libm_alias_ldouble (__exp, exp) |
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| 44 | #endif |
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| 45 | |
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