hexp2

Applicability

Function Usage

Obtains the value of 2 raised to the power of x.

Prototype

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inline half hexp2(half x)

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inline bfloat16_t hexp2(bfloat16_t x)

Parameters

Returns

The value of 2 raised to the power of x.

• If x is inf, the return value is inf.
• If x is -inf, the return value is 0.
• If x is nan, the return value is nan.
• If the result 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 the half API, the simt_api/asc_fp16.h header file must be included. To use the bfloat16_t API, the simt_api/asc_bf16.h header file must be included.

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#include "simt_api/asc_fp16.h"

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#include "simt_api/asc_bf16.h"

Examples

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__simt_vf__ __launch_bounds__(1024) inline void KernelExp2(__gm__ half* dst, __gm__ half* x)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = hexp2(x[idx]);
}