| 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 | |