Use the type stored in the Parameters array to determine the layout
instead of the type in the instruction register field. Also, update
the instruction register field based on the parameter type.
This makes Google Earth work exactly like with Mesa master.
Remove commented-out opcodes. Remove information about API mappings
to opcodes, but add a reference to tgsi-instruction-set.txt where
that information is better presented.
Various opcodes which can be implemented trivially with other TGSI opcodes,
such as matrix multiplication and negation. These were not used by any
state tracker or implemented by any of the drivers.
The 965 driver expects unused source registers (e.g., SrcReg[2] of a
DP3 instruction) to have a register file of PROGRAM_UNDEFINED.
Initializing these source registers ensures that this happens.
This is a source of ongoing confusion. TGSI has multiple names for
opcodes where the same semantics originate in multiple shader APIs.
For instance, TGSI includes both Mesa/GLSL and DX/SM30 names for
opcodes with the same semantics, but aliases those names to the same
underlying opcode number.
This makes it very difficult to visually inspect two sets of opcodes
(eg in state tracker & driver) and check if they implement the same
functionality.
This patch arbitarily rips out the versions of the opcodes not currently
favoured by the mesa state tracker and leaves us with a single name
for each distinct operation.
Remove the need to have a pointer in this struct by just including
the immediate data inline. Having a pointer in the struct introduces
complications like needing to alloc/free the data pointed to, uncertainty
about who owns the data, etc. There doesn't seem to be a need for it,
and it is unlikely to make much difference plus or minus to performance.
Added some asserts as we now will trip up on immediates with more
than four elements. There were actually already quite a few such asserts,
but the >4 case could be used in the future to specify indexable immediate
ranges, such as lookup tables.
