tgsi: document semantics for compute shaders

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index c6e5ceb7ec..881aef6a79 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -3054,6 +3054,34 @@ parameter to the clEnqueueNDRangeKernel call with which the shader
 was started.
 
 
+TGSI_SEMANTIC_GRID_SIZE
+"""""""""""""""""""""""
+
+For compute shaders, this semantic indicates the maximum (x, y, z) dimensions
+of a grid of thread blocks.
+
+
+TGSI_SEMANTIC_BLOCK_ID
+""""""""""""""""""""""
+
+For compute shaders, this semantic indicates the (x, y, z) coordinates of the
+current block inside of the grid.
+
+
+TGSI_SEMANTIC_BLOCK_SIZE
+""""""""""""""""""""""""
+
+For compute shaders, this semantic indicates the maximum (x, y, z) dimensions
+of a block in threads.
+
+
+TGSI_SEMANTIC_THREAD_ID
+"""""""""""""""""""""""
+
+For compute shaders, this semantic indicates the (x, y, z) coordinates of the
+current thread inside of the block.
+
+
 Declaration Interpolate
 ^^^^^^^^^^^^^^^^^^^^^^^