Shader Model 6

All non-quad-related wave intrinsics are available in all shader stages. In shader model 6.0, quad wave intrinsics are available in pixel and compute shaders, but the quad layout in compute shaders isn't defined. Shader model 6.6 defines the quad layout for compute shaders and adds support for quad wave intrinsics in amplification and mesh shaders.

In this section

Topic	Description
QuadReadAcrossDiagonal	Returns the specified local value which is read from the diagonally opposite lane in this quad.
QuadReadLaneAt	Returns the specified source value from the lane identified by the lane ID within the current quad.
QuadReadAcrossX	Returns the specified local value read from the other lane in this quad in the X direction.
QuadReadAcrossY	Returns the specified source value read from the other lane in this quad in the Y direction.
WaveActiveAllEqual	Returns true if the expression is the same for every active lane in the current wave (and thus uniform across it).
WaveActiveBitAnd	Returns the bitwise AND of all the values of the expression across all active lanes in the current wave and replicates it back to all active lanes.
WaveActiveBitOr	Returns the bitwise OR of all the values of the expression across all active lanes in the current wave and replicates it back to all active lanes.
WaveActiveBitXor	Returns the bitwise XOR of all the values of the expression across all active lanes in the current wave and replicates it back to all active lanes.
WaveActiveCountBits	Counts the number of boolean variables which evaluate to true across all active lanes in the current wave, and replicates the result to all lanes in the wave.
WaveActiveMax	Returns the maximum value of the expression across all active lanes in the current wave and replicates it back to all active lanes.
WaveActiveMin	Returns the minimum value of the expression across all active lanes in the current wave and replicates it back to all active lanes.
WaveActiveProduct	Multiplies the values of the expression together across all active lanes in the current wave and replicates it back to all active lanes.
WaveActiveSum	Sums up the value of the expression across all active lanes in the current wave and replicates it to all lanes in the current wave.
WaveActiveAllTrue	Returns true if the expression is true in all active lanes in the current wave.
WaveActiveAnyTrue	Returns true if the expression is true in any of the active lanes in the current wave.
WaveActiveBallot	Returns a uint4 containing a bitmask of the evaluation of the Boolean expression for all active lanes in the current wave.
WaveGetLaneCount	Returns the number of lanes in a wave on this architecture.
WaveGetLaneIndex	Returns the index of the current lane within the current wave.
WaveIsFirstLane	Returns true only for the active lane in the current wave with the smallest index.
WavePrefixCountBits	Returns the sum of all the specified boolean variables set to true across all active lanes with indices smaller than the current lane.
WavePrefixProduct	Returns the product of all of the values in the active lanes in this wave with indices less than this lane.
WavePrefixSum	Returns the sum of all of the values in the active lanes with smaller indices than this one.
WaveReadLaneFirst	Returns the value of the expression for the active lane of the current wave with the smallest index.
WaveReadLaneAt	Returns the value of the expression for the given lane index within the specified wave.

Related topics

Overview of Shader Model 6

Shader Models vs Shader Profiles