GetBitwiseAndMaxMinTmpSize

Function Usage

Obtains the maximum and minimum sizes of the temporary space to be reserved or allocated on the host. To perform BitwiseAnd computation on the kernel, you need to reserve or allocate the temporary space. You can select a proper size within the specified range as the tiling parameter and pass it to the kernel.

To ensure correct functions, the temporary space to be reserved or allocated cannot be less than the minimum temporary space.
Within the range between the minimum and maximum, as the temporary space increases, the API computing performance in the kernel can be optimized to some extent. To achieve better performance, reserve or allocate the space based on the actual buffer usage.

Prototype

void GetBitwiseAndMaxMinTmpSize(const platform_ascendc::PlatformAscendC& ascendcPlatform, const ge::Shape& srcShape, const uint32_t typeSize, const bool isReuseSource, uint32_t& maxValue, uint32_t& minValue)

Parameters

**Table 1** API parameters
Parameter	Input/Output	Function
ascendcPlatform	Input	Platform information. For details about the definition of PlatformAscendC, see Constructor and Destructor.
srcShape	Input	Input shape.
typeSize	Input	Size of the input data type, in bytes. For example, if the input data type is uint16_t, set this parameter to 2.
isReuseSource	Input	This parameter is reserved. Pass the default value false.
maxValue	Output	Maximum size of the temporary space required by BitwiseAnd computation. Any space exceeding this value will not be utilized by the API. Within the range between the minimum and maximum, as the temporary space increases, the API computing performance in the kernel can be optimized to some extent. To achieve better performance, reserve or allocate the space based on the actual buffer usage. If the maximum space size is 0, no temporary space is required. Note: maxValue is for reference only and may be larger than the available space of the Unified Buffer. In this case, select a proper temporary space size based on the remaining space of the Unified Buffer.
minValue	Output	Minimum size of the temporary space required by BitwiseAnd computation. To ensure correct functions, the size of the temporary space to be reserved or allocated during API computation cannot be less than the value of this parameter. If the minimum space size is 0, no temporary space is required.

Returns

None

Constraints

None

Examples

For a complete call example, see More Examples.

// The input shape is 1024. The operator input data is of the half type. The source operand cannot be modified.
std::vector<int64_t> shape_vec = {1024};
ge::Shape shape(shape_vec);
uint32_t maxValue = 0;
uint32_t minValue = 0;
auto plat = platform_ascendc::PlatformAscendC(context->GetPlatformInfo());
AscendC::GetBitwiseAndMaxMinTmpSize(plat, shape, 2, false, maxValue, minValue);

Parent topic: BitwiseAnd APIs