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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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