23 lines
538 B
C
23 lines
538 B
C
/*
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* wrapper exp2f(x)
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*/
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#include <float.h>
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#include <math.h>
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#include <math_private.h>
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static const float o_threshold = (float) FLT_MAX_EXP;
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static const float u_threshold = (float) (FLT_MIN_EXP - FLT_MANT_DIG - 1);
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float
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__exp2f (float x)
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{
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if (__builtin_expect (x <= u_threshold || x > o_threshold, 0)
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&& _LIB_VERSION != _IEEE_ && __finitef (x))
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/* exp2 overflow: 144, exp2 underflow: 145 */
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return __kernel_standard_f (x, x, 144 + (x <= o_threshold));
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return __ieee754_exp2f (x);
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}
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weak_alias (__exp2f, exp2f)
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