diff options
Diffstat (limited to 'newlib/libm/machine/spu/headers/logbf4.h')
| -rw-r--r-- | newlib/libm/machine/spu/headers/logbf4.h | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/newlib/libm/machine/spu/headers/logbf4.h b/newlib/libm/machine/spu/headers/logbf4.h index d3dbeeb93..aa3271b2e 100644 --- a/newlib/libm/machine/spu/headers/logbf4.h +++ b/newlib/libm/machine/spu/headers/logbf4.h @@ -57,19 +57,18 @@ /* * FUNCTION - * vector float _scalbnf4(vector float x, vector signed int exp) + * vector float _logbf4(vector float x) * * DESCRIPTION - * The _scalbnf4 function returns a vector containing each element of x - * multiplied by 2^n computed efficiently. This function is computed - * without the assistance of any floating point operations and as such - * does not set any floating point exceptions. + * The _logbf4 function returns a vector float that contains the exponent + * of the corresponding elements of the input vector x. The exponent is + * defined by: + * x = frac * FLT_RADIX^exp, with frac in [1, FLT_RADIX). * - * Special Cases: - * - if the exponent is 0, then x is either 0 or a subnormal, and the - * result will be returned as 0. - * - if the result if underflows, it will be returned as 0. - * - if the result overflows, it will be returned as FLT_MAX. + * Special Cases: + * x = 0, result is undefined. + * x = NaN, result is NaN. + * x = infinity, +infinity is returned. * */ static __inline vector float _logbf4(vector float x) |