log1pf

Applicability

Function Usage

Obtains the logarithm of the input data plus 1 with base e.

Prototype

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inline float log1pf(float x)

Parameters

Returns

Logarithm of x plus 1 with base e.

• If x is inf, the return value is inf.
• If x is -inf, the return value is nan.
• If x is nan, the return value is nan.

Restrictions

For SIMT programming, this API is not supported.

Header File to Be Included

To use this API, the simt_api/math_functions.h header file must be included.

1

#include "simt_api/math_functions.h"

Examples

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__simt_vf__ __launch_bounds__(1024) inline void KernelLog1p(__gm__ float* dst, __gm__ float* x)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = log1pf(x[idx]);
}