diff options
Diffstat (limited to 'src/gallium/docs')
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 64 |
1 files changed, 58 insertions, 6 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index d99ed7c6d6..7eb6bd05d7 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -577,17 +577,45 @@ This instruction replicates its result. .. opcode:: TEX - Texture Lookup - TBD +.. math:: + + coord = src0 + + bias = 0.0 + + dst = texture_sample(unit, coord, bias) .. opcode:: TXD - Texture Lookup with Derivatives - TBD +.. math:: + + coord = src0 + + ddx = src1 + + ddy = src2 + + bias = 0.0 + + dst = texture_sample_deriv(unit, coord, bias, ddx, ddy) .. opcode:: TXP - Projective Texture Lookup - TBD +.. math:: + + coord.x = src0.x / src.w + + coord.y = src0.y / src.w + + coord.z = src0.z / src.w + + coord.w = src0.w + + bias = 0.0 + + dst = texture_sample(unit, coord, bias) .. opcode:: UP2H - Unpack Two 16-Bit Floats @@ -729,7 +757,19 @@ This instruction replicates its result. .. opcode:: TXB - Texture Lookup With Bias - TBD +.. math:: + + coord.x = src.x + + coord.y = src.y + + coord.z = src.z + + coord.w = 1.0 + + bias = src.z + + dst = texture_sample(unit, coord, bias) .. opcode:: NRM - 3-component Vector Normalise @@ -767,9 +807,21 @@ This instruction replicates its result. dst = src0.x \times src1.x + src0.y \times src1.y -.. opcode:: TXL - Texture Lookup With LOD +.. opcode:: TXL - Texture Lookup With explicit LOD - TBD +.. math:: + + coord.x = src0.x + + coord.y = src0.y + + coord.z = src0.z + + coord.w = 1.0 + + lod = src0.w + + dst = texture_sample(unit, coord, lod) .. opcode:: BRK - Break |