1 | /* |
2 | * wrapper exp2f(x) |
3 | */ |
4 | |
5 | #include <math.h> |
6 | #include <math_private.h> |
7 | #include <math-svid-compat.h> |
8 | |
9 | #if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27) |
10 | float |
11 | __exp2f_compat (float x) |
12 | { |
13 | float z = __ieee754_exp2f (x); |
14 | if (__builtin_expect (!isfinite (z) || z == 0, 0) |
15 | && isfinite (x) && _LIB_VERSION != _IEEE_) |
16 | /* exp2 overflow: 144, exp2 underflow: 145 */ |
17 | return __kernel_standard_f (x, x, 144 + !!signbit (x)); |
18 | |
19 | return z; |
20 | } |
21 | compat_symbol (libm, __exp2f_compat, exp2f, GLIBC_2_1); |
22 | #endif |
23 | |