Terminology TermĪ single thread of execution. Some operations (such as the bitwise operators) only support the integer types. The parameter and return value for these functions implies the type of the expression, the supported types are those from the following list that are also present in the target shader model for your app:

The functions have been added to the requirements for DirectX Feature Level 12.0, under API level 12. Most of the intrinsics appear in pixel shaders and compute shaders, though there are some exceptions (noted for each function). Potential use cases include: stream compaction, reductions, block transpose, bitonic sort or Fast Fourier Transforms (FFT), binning, stream de-duplication, and similar scenarios. For example, the model 6.0 intrinsics enable the elimination of barrier constructs when the scope of synchronization is within the width of the SIMD processor, or some other set of threads that are known to be atomic relative to each other. New wave-level operations are provided, starting with model 6.0, to explicitly take advantage of the parallelism of current GPUs - many threads can be executing in lockstep on the same core simultaneously. Describes the wave operation intrinsics added to HLSL Shader Model 6.0.įor earlier shader models, HLSL programming exposes only a single thread of execution.

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