__half2float

Applicability

Function Usage

Converts half data to the floating-point type and returns the converted value.

Prototype

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inline float __half2float(const half x)

Parameters

Returns

The floating-point data converted from the input. Special scenarios are described as follows:

• If x is nan, the return value is nan.
• If x is inf, the return value is inf.
• If x is -inf, 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/asc_fp16.h header file must be included.

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#include "simt_api/asc_fp16.h"

Examples

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__simt_vf__ __launch_bounds__(1024) inline void kernel__half2float(__gm__ float* dst, __gm__ half* x)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = __half2float(x[idx]);
}