Each logical variant is largely equivalent to the original opcode but
instead of taking a single payload source it expects the arguments
separately as individual sources, like:
tex_logical dst, coordinates, shadow_c, lod, lod2,
sample_index, mcs, sampler, offset,
num_coordinate_components, num_grad_components
This patch defines the opcodes and usual instruction boilerplate,
including a placeholder lowering function provided mostly as
documentation for their source registers.
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Francisco Jerez
33deff4f05