erfinvf

Applicability

Function Usage

Obtains the inverse error function value of the input data.

Prototype

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inline float erfinvf(float x)

Parameters

Returns

• If x is 0, the return value is 0.
• If x is nan, the return value is nan.
• If x is 1, the return value is inf.
• If x is -1, the return value is -inf.
• If x∉[-1,1], 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.

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#include "simt_api/math_functions.h"

Examples

For SIMD and SIMT programming:

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