ToFloat

Applicability

Product	Supported/Unsupported
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	x
Atlas inference product's AI Core	x
Atlas inference product's Vector Core	x
Atlas training products	x

Function Usage

Converts the input data to the float type.

Prototype

Converts bfloat16_t to float.

__aicore__ inline float ToFloat(const bfloat16_t& bVal)

Parameters

**Table 1** API parameters
Parameter	Input/Output	Meaning
bVal	Input	Scalar data to be converted.

Returns

Converted scalar data of the float type.

Restrictions

None

Example

void CalcFunc(bfloat16_t n)
{
	int dataLen = 32;
	AscendC::TPipe pipe;
	AscendC::TQue<AscendC::TPosition::VECIN, 1> inQueueSrcVecIn;
	AscendC::TQue<AscendC::TPosition::VECOUT, 1> inQueueDstVecIn;
	pipe.InitBuffer(inQueueDstVecIn, 1, dataLen * sizeof(bfloat16_t));
	pipe.InitBuffer(inQueueSrcVecIn, 1, dataLen * sizeof(float));
	AscendC::LocalTensor<bfloat16_t> dstLocal = inQueueDstVecIn.AllocTensor<bfloat16_t>();
	AscendC::LocalTensor<float> srcLocal = inQueueSrcVecIn.AllocTensor<float>();
	float t = AscendC::ToFloat(n);// Add scalars. bfloat16_t is not supported and needs to be converted to float first.
	PipeBarrier<PIPE_ALL>();
	AscendC::Duplicate(srcLocal, float(4.0f), dataLen);
	PipeBarrier<PIPE_ALL>();
	Adds(srcLocal, srcLocal, t, dataLen);
	PipeBarrier<PIPE_ALL>();
	// Output a tensor of the bfloat16_t type after the addition operation.
	Cast(dstLocal, srcLocal, AscendC::RoundMode::CAST_ROUND, dataLen);
	// ......
}

Parent topic: Scalar Computation