cyl_bessel_i0f

Applicability

Function Usage

Obtains the value of the zeroth-order regular modified cylindrical Bessel function of the input data x.

Prototype

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inline float cyl_bessel_i0f(float x)

Parameters

Returns

The value of the zeroth-order regular modified cylindrical Bessel function of the input data.

• If x is 0, the return value is 1.
• If x is inf, the return value is inf.
• If x is -inf, the return value is inf.
• If x is nan, the return value is nan.
• If the return value exceeds the maximum range of float, the return value is inf.

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.

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#include "simt_api/math_functions.h"

Examples

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__simt_vf__ __launch_bounds__(1024) inline void KernelCylBesselI0(__gm__ float* dst, __gm__ float* x)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = cyl_bessel_i0f(x[idx]);
}