Faith Ekstrand gfxstrand
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This extension provides API support for
Faith Ekstrand, Intel
This extension allows a shader to perform 16-bit floating-point atomic
operations on buffer and workgroup memory as well as floating-point atomic
minimum and maximum operations on buffer, workgroup, and image memory.
It advertises the SPIR-V
AtomicFloat16AddEXT capability which allows
atomic add operations on 16-bit floating-point numbers and the SPIR-V
AtomicFloat64MinMaxEXT capabilities which allow atomic minimum and
maximum operations on floating-point numbers.
The supported operations include
1) Should this extension add support for 16-bit image atomics?
While Vulkan supports creating storage images with
VK_FORMAT_R16_SFLOAT and doing load and store on them, the data in the
shader has a 32-bit representation.
Vulkan currently has no facility for even basic reading or writing such
images using 16-bit float values in the shader.
Adding such functionality would be required before 16-bit image atomics
would make sense and is outside the scope of this extension.
For more information, see the Vulkan Specification
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