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-rw-r--r--src/gallium/docs/source/tgsi.rst24
1 files changed, 21 insertions, 3 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index 551e9dd379f..1a51fe987b8 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -417,17 +417,35 @@ This instruction replicates its result.
.. opcode:: PK2US - Pack Two Unsigned 16-bit Scalars
- TBD
+This instruction replicates its result.
+
+.. math::
+
+ dst = f32\_to\_unorm16(src.x) | f32\_to\_unorm16(src.y) << 16
.. opcode:: PK4B - Pack Four Signed 8-bit Scalars
- TBD
+This instruction replicates its result.
+
+.. math::
+
+ dst = f32\_to\_snorm8(src.x) |
+ (f32\_to\_snorm8(src.y) << 8) |
+ (f32\_to\_snorm8(src.z) << 16) |
+ (f32\_to\_snorm8(src.w) << 24)
.. opcode:: PK4UB - Pack Four Unsigned 8-bit Scalars
- TBD
+This instruction replicates its result.
+
+.. math::
+
+ dst = f32\_to\_unorm8(src.x) |
+ (f32\_to\_unorm8(src.y) << 8) |
+ (f32\_to\_unorm8(src.z) << 16) |
+ (f32\_to\_unorm8(src.w) << 24)
.. opcode:: SEQ - Set On Equal