float16_promote.h#

namespace onnx_light

Alias that makes onnx-light headers compatible with code that references ONNX_LIGHT_NAMESPACE (the macro used in the standard onnx package).

Set to ONNX_LIGHT_NAMESPACE so both names resolve to the same namespace.

Symbol-visibility attribute for the public onnx-light C++ API.

Defined as empty because onnx-light does not require explicit __declspec(dllexport) or __attribute__((visibility("default"))) annotations — visibility is controlled at the shared-library level. The macro is provided so that vendored ONNX headers that decorate their declarations with ONNX_API compile without modification.

Namespace alias so that ONNX C++ code (and consumers such as onnxruntime) that refers to the literal onnx namespace — rather than the ONNX_NAMESPACE macro — resolves to the onnx-light namespace. The standard onnx package lives in namespace onnx; onnx-light uses onnx_light (via ONNX_LIGHT_NAMESPACE), so this alias keeps onnx-light a true drop-in. It is only introduced when the onnx-light namespace differs from onnx.

namespace onnx_kernels

Functions

inline bool IsHalfPrecision(int32_t data_type)#

Returns true if the data type is FLOAT16 or BFLOAT16.

Tensor PromoteToFloat32(const Tensor &src)#

Converts a FLOAT16 or BFLOAT16 tensor to FLOAT32. If the input is already FLOAT or DOUBLE, returns a copy unchanged (no conversion).

Tensor DemoteFromFloat32(const Tensor &src, int32_t target_dtype)#

Demotes a FLOAT32 tensor back to FLOAT16 or BFLOAT16.

Parameters:

  • src – The float32 tensor to demote.

  • target_dtype – The target data type (FLOAT16 or BFLOAT16).

Returns:

A new Tensor with data_type == target_dtype and the same shape/name.