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The LOOP/ENDLOOP pair is renamed to BGNFOR/ENDFOR as its behaviour
is similar to a C language for-loop.
The BGNLOOP2/ENDLOOP2 pair is renamed to BGNLOOP/ENDLOOP as now
there is no name collision.
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The only valid usage for LOOP/ENDLOOP instructions
is LOOP[0] as a destination register.
The only valid usage for the remaining instructions
is LOOP[0].x as an indirect register.
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When sampling a 2D shadow map we need 3 texcoord components, not 2.
The third component (distance from light source) is compared against
the texture sample to return the result (visible vs. occluded).
Also, enable proper handling of TGSI_TEXTURE_SHADOW targets in Mesa->TGSI
translation. There's a possibility for breakage in gallium drivers if
they fail to handle the TGSI_TEXTURE_SHADOW1D / TGSI_TEXTURE_SHADOW2D /
TGSI_TEXTURE_SHADOWRECT texture targets for TGSI_OPCODE_TEX/TXP instructions,
but that should be easy to fix.
With these changes, progs/demos/shadowtex.c renders properly again with
softpipe.
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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.
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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.
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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.
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This function was calling get_input_base() and get_output_base() to
get the names of a couple of register to use as temps. Those
functions no longer return registers, so adjust it to get the
registers elsewhere.
This change doesn't address the issue that it's a fairly poor way to
grab a register name by calling a function with an apparently
unrelated meaning.
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Use sse_movmskps to extract the correct bits of the comparison result
for use in updating the killmask. Simplify some logic around
identifying the set of necessary comparisons to make.
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Most obvious problem is drawpixels comes out blocky, but this may be
an existing issue of KIL on the sse path.
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Take a list of arguments rather than hardcoding TEMP_R0.
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Pass the tgsi_exec_machine struct in directly and just hold a single
pointer to this struct, rather than keeping one for each of its
internal members.
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Can now guarantee alignment in the initial allocation of the tgsi exec machine.
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A lot of draw code no longer needs to see this header.
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Explictly pass src and dst arguments (previously dst argument was also
being used as a src). Separate argument handling from the rest of
the function call emit.
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Centralize the creation, initialization and destruction of this struct.
Use align_malloc instead of home-brew alternatives.
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Same story as in the tgsi_dump.c code (see prev commit).
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Fixes TGSI dump output when front/back-face register is declared.
Also, add some assertions to make sure the semantic/interpolate string
arrays have as many elements as there are tokens in the p_shader_tokens.h
file. That should catch problems like this in the future.
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Includes the TGSI interpreter, but not the SSE/PPC/etc code generators.
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We were failing to deal with:
- vsnprintf returns negative value on error.
- vsnprintf returns the number of chars that *would* have been
written on truncation.
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Add a dummy function which exists only so that tgsi_text_translate()
doesn't get magic-ed out of the libtgsi.a archive by the build system.
Don't remove unless you know this has been fixed - check on
mingw/scons builds as well.
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The TGSI interpeter operates in SOA style. We need to check for data
dependencies in instructions which read from and write to the same register.
For now just adding some debug code to detect that condition. Actual fixes
to follow.
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Fall back to interpreter in this case.
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Fix comments.
Make sure .w is set to 1.0 for NRM.
Optimise for non-.xyzw writemasks.
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Check for NaN/Inf, print exec vectors, print temp registers.
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Fixes segfault when sampling 1D textures.
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