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| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 8506b7e0309..949ad89e929 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -1868,7 +1868,15 @@ after lookup. the mipmap level selected by the src_mip_level and are in the number of texels. For 1d texture array width is in dst.x, array size - is in dst.y and dst.zw are always 0. + is in dst.y and dst.z is 0. The number of mipmaps + is still in dst.w. + In contrast to d3d10 resinfo, there's no way in the + tgsi instruction encoding to specify the return type + (float/rcpfloat/uint), hence always using uint. Also, + unlike the SAMPLE instructions, the swizzle on src1 + resinfo allowing swizzling dst values is ignored (due + to the interaction with rcpfloat modifier which requires + some swizzle handling in the state tracker anyway). .. opcode:: SAMPLE_POS - query the position of a given sample. dst receives float4 (x, y, 0, 0) indicated where the |