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c0f67a127b
Three-source instructions have a vertical stride overloaded to 4, which prevents directly using vec4 uniforms as arguments. Instead we need to insert a MOV instruction to do the replication for the three-source instruction. With this in place, we can use three-source instructions in the vertex shader. While some thought needs to go into deciding whether its better to use a three-source instruction rather than a sequence of equivalent instructions (when one or more sources are uniforms or immediates), this will allow us to skip a lot of ugly lowering code and use the BFE and BFI2 instructions directly. Reviewed-by: Chris Forbes <chrisf@ijw.co.nz> Reviewed-by: Eric Anholt <eric@anholt.net> |
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| mesa | ||
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