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Diffstat (limited to 'src/gallium/docs/source/tgsi.rst')
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 039cb1c03d5..5cf08752e75 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -1026,9 +1026,16 @@ XXX so let's discuss it, yeah? dst.w = |src0.w - src1.w| + src2.w -.. opcode:: TXF - Texel Fetch - - TBD +.. opcode:: TXF - Texel Fetch (as per NV_gpu_shader4), extract a single texel + from a specified texture image. The source sampler may + not be a CUBE or SHADOW. + src 0 is a four-component signed integer vector used to + identify the single texel accessed. 3 components + level. + src 1 is a 3 component constant signed integer vector, + with each component only have a range of + -8..+8 (hw only seems to deal with this range, interface + allows for up to unsigned int). + TXF(uint_vec coord, int_vec offset). .. opcode:: TXQ - Texture Size Query (as per NV_gpu_program4) |