y0f

Applicability

Function Usage

Obtains the value of the zeroth-order second-type Bessel function y0 of the input data x.

Prototype

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inline float y0f(float x)

Parameters

Returns

The value of the zeroth-order second-type Bessel function y0 of the input data x.

• If x is less than 0, the return value is nan.
• If x is 0, the return value is -inf.
• If x is 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 KernelY0(__gm__ float* dst, __gm__ float* x)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = y0f(x[idx]);
}