38 lines
1003 B
C
38 lines
1003 B
C
/*
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* wrapper exp2(x)
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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-svid-compat.h>
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#include <libm-alias-double.h>
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#if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_29) \
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|| defined NO_LONG_DOUBLE \
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|| defined LONG_DOUBLE_COMPAT)
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double
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__exp2_compat (double x)
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{
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double z = __ieee754_exp2 (x);
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if (__builtin_expect (!isfinite (z) || z == 0, 0)
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&& isfinite (x) && _LIB_VERSION != _IEEE_)
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/* exp2 overflow: 44, exp2 underflow: 45 */
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return __kernel_standard (x, x, 44 + !!signbit (x));
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return z;
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}
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# if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_29)
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compat_symbol (libm, __exp2_compat, exp2, GLIBC_2_1);
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# endif
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# ifdef NO_LONG_DOUBLE
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weak_alias (__exp2_compat, exp2l)
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# endif
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# ifdef LONG_DOUBLE_COMPAT
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/* Work around gas bug "multiple versions for symbol". */
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weak_alias (__exp2_compat, __exp2_compat_alias)
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LONG_DOUBLE_COMPAT_CHOOSE_libm_exp2l (
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compat_symbol (libm, __exp2_compat_alias, exp2l, FIRST_VERSION_libm_exp2l), );
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# endif
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#endif
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