SPV_NV_shader_atomic_fp16_vector

SPV_NV_shader_atomic_fp16_vector

To report problems with this extension, please open a new issue at:

https://github.com/KhronosGroup/SPIRV-Headers

This extension is written against the SPIR-V Specification, Version 1.6 Revision 3.

This extension requires SPIR-V 1.0.

This extension reuses instructions from extensions SPV_EXT_shader_atomic_float_add and SPV_EXT_shader_atomic_float_min_max but does not require them to be supported or enabled.

This extension adds support for atomic add, min, max and exchange instructions on float16 vectors with 2 or 4 components.

To use this extension within a SPIR-V module, the following OpExtension must be present in the module:

This extension introduces the new capability:

Modify Section 3.31, "Capability", adding this row to the Capability table:

Modify section 3.49.18, Atomic Instructions:

Add the AtomicFloat16VectorNV capability to the OpAtomicFAddEXT, OpAtomicFMinEXT, and OpAtomicFMaxEXT instructions,

Modify each of the instructions OpAtomicFAddEXT, OpAtomicFMinEXT, OpAtomicFMaxEXT, and OpAtomicExchange to allow the Result Type to be a vector of float16 with two or four components. Atomic operations on vectors only guarantee atomicity of each component.

An OpExtension must be added to the SPIR-V for validation layers to check legal use of this extension:

None.