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gallium: document PK2H/UP2H

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Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Ilia Mirkin 2015-10-29 02:52:55 -04:00
parent 0ab2c21b93
commit 6eb74b87b8
1 changed files with 14 additions and 2 deletions
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16
src/gallium/docs/source/tgsi.rst
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@ -458,7 +458,11 @@ while DDY is allowed to be the same for the entire 2x2 quad.
.. opcode:: PK2H - Pack Two 16-bit Floats
TBD
This instruction replicates its result.
.. math::
dst = f32\_to\_f16(src.x) | f32\_to\_f16(src.y) << 16
.. opcode:: PK2US - Pack Two Unsigned 16-bit Scalars
@ -615,7 +619,15 @@ This instruction replicates its result.
.. opcode:: UP2H - Unpack Two 16-Bit Floats
TBD
.. math::
dst.x = f16\_to\_f32(src0.x \& 0xffff)
dst.y = f16\_to\_f32(src0.x >> 16)
dst.z = f16\_to\_f32(src0.x \& 0xffff)
dst.w = f16\_to\_f32(src0.x >> 16)
.. note::