j0f

Applicability

Function Usage

Obtains the value of the zeroth-order first-type Bessel function j0 of the input data x.

Prototype

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inline float j0f(float x)

Parameters

Returns

The value of the zeroth-order first-type Bessel function j0 of the input data.

• If x is inf or -inf, the return value is 0.
• If x is nan, the return value is nan.

Restrictions

When this API is used, the number of configured threads cannot exceed 256. Otherwise, stack overflow may occur.

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.

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#include "simt_api/math_functions.h"

Examples

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__simt_vf__ __launch_bounds__(256) inline void KernelJ0(__gm__ float* dst, __gm__ float* x)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = j0f(x[idx]);
}