Implement shader subgroup rotate intrinsics (#6878)

* Initial implementation for SPIRV, GLSL and Metal

* test add bool test

* Fix and improve subgroup rotate tests

* Add proper GLSL extensions and proper Metal type checking

* Clean up tests and add diagnostics test for subgroup type for Metal

* Update wave-intrinsics docs

1 files changed, 14 insertions, 0 deletions

diff --git a/docs/wave-intrinsics.md b/docs/wave-intrinsics.md
index aa46f72a1..7f6fb7b77 100644
--- a/docs/wave-intrinsics.md
+++ b/docs/wave-intrinsics.md
@@ -236,6 +236,20 @@ void GroupMemoryBarrierWithWaveSync();
 
 Synchronizes all lanes to the same GroupMemoryBarrierWithWaveSync in program flow. Orders group shared memory accesses such that accesses after the barrier can be seen by writes before.  
 
+Wave Rotate Intrinsics
+======================
+
+These intrinsics are specific to Slang and were added to support the subgroup rotate functionalities provided by SPIRV (through the `GroupNonUniformRotateKHR` capability), GLSL (through the `GL_KHR_shader_subgroup_rotate
+` extension), and Metal.
+
+```
+// Supported on SPIRV, GLSL, and Metal targets.
+T WaveRotate(T value, uint delta);
+
+// Supported on SPIRV and GLSL targets.
+T WaveClusteredRotate(T value, uint delta, constexpr uint clusterSize);
+```
+
 Wave Mask Intrinsics
 ====================