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author | Michal Krol <michal@vmware.com> | 2009-11-24 11:58:01 +0100 |
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committer | Michal Krol <michal@vmware.com> | 2009-11-24 11:58:01 +0100 |
commit | 3c46bbee1bb4f107d68addae472cf7bbc0976653 (patch) | |
tree | e791a4a81bfd75c2255386f10679b967cf4e84e4 /src | |
parent | bae9ece685e3c10fc0118e99771845d15895a0cc (diff) |
tgsi: Document Declaration Semantic token and FACE semantic name.
Diffstat (limited to 'src')
-rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt b/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt index eb492076b7d..080fd4c7310 100644 --- a/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt +++ b/src/gallium/auxiliary/tgsi/tgsi-instruction-set.txt @@ -1129,3 +1129,35 @@ TGSI Instruction Specification target Label of target instruction. + +3 Other tokens +=============== + + +3.1 Declaration Semantic +------------------------- + + + Follows Declaration token if Semantic bit is set. + + Since its purpose is to link a shader with other stages of the pipeline, + it is valid to follow only those Declaration tokens that declare a register + either in INPUT or OUTPUT file. + + SemanticName field contains the semantic name of the register being declared. + There is no default value. + + SemanticIndex is an optional subscript that can be used to distinguish + different register declarations with the same semantic name. The default value + is 0. + + The meanings of the individual semantic names are explained in the following + sections. + + +3.1.1 FACE + + Valid only in a fragment shader INPUT declaration. + + FACE.x is negative when the primitive is back facing. FACE.x is positive + when the primitive is front facing. |