fmaxf

Applicability

Function Usage

Obtains the maximum value between two inputs.

Prototype

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inline float fmaxf(float x, float y)

Parameters

Returns

Maximum value of the two input data elements.

• If x is +0 and y is -0, the return value is x.
• If x is -0 and y is +0, the return value is y.
• If x is nan, the return value is y.
• If y is nan, the return value is x.
• If both x and y are nan, the return value is nan.
• If either x or y is inf, the return value is inf.
• If x is -inf, the return value is y.
• If y is -inf, the return value is x.

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 KernelMax(__gm__ float* dst, __gm__ float* x, __gm__ float* y)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = fmaxf(x[idx], y[idx]);
}