__habs

Applicability

Function Usage

Obtains the absolute value of the input data.

Prototype

1

inline half __habs(half x)

1

inline bfloat16_t __habs(bfloat16_t x)

Parameters

Returns

Absolute value of the input data.

• If x is ±0, the return value is +0.
• 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 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.

1

#include "simt_api/asc_fp16.h"

1

#include "simt_api/asc_bf16.h"

Examples

1
2
3
4
5

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