1 | /* |
---|---|
2 | * wrapper exp2(x) |
3 | */ |
4 | |
5 | #include <math.h> |
6 | #include <math_private.h> |
7 | |
8 | double |
9 | __exp2 (double x) |
10 | { |
11 | double z = __ieee754_exp2 (x); |
12 | if (__builtin_expect (!isfinite (z) || z == 0, 0) |
13 | && isfinite (x) && _LIB_VERSION != _IEEE_) |
14 | /* exp2 overflow: 44, exp2 underflow: 45 */ |
15 | return __kernel_standard (x, x, 44 + !!signbit (x)); |
16 | |
17 | return z; |
18 | } |
19 | weak_alias (__exp2, exp2) |
20 | #ifdef NO_LONG_DOUBLE |
21 | strong_alias (__exp2, __exp2l) |
22 | weak_alias (__exp2, exp2l) |
23 | #endif |
24 |