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running shaders in llvm.
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Need to set the slot's bit in draw->vcache.referenced even when there was a
cache hit since flushing the primitive buffer will have cleared the bitfield
but not the cache's vertex indexes.
Fixes a bug found when drawing long triangle fans but could be hit by other
prim types as well.
An alternate fix would be to call draw_vertex_cache_invalidate() from
draw_vertex_cache_unreference().
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Also, assert that index is not too large before indexing array.
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instructions
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This was only needed to avoid out-of-bounds memory accesses with the
2x2 quad_read/write() functions which no longer exist.
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First step to consolidating surface/texture caching...
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This fixes a DRM BO failure upon swapbuffers caused by the color buffer
still being mapped.
This is a bit heavy handed since we don't always need to unmap buffers
when flushing. Need to pass a flag to flush() or design a new function.
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Also, quite a bit of re-org of the tile caches and surface mapping/unmapping.
Leave surfaces mapped between primitives now.
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Instead of using read/write_quad() functions, do framebuffer accesses via
get/put_tile(). A cache of tiles is used to avoid frequent get/put() calls.
Only implemented for color buffers right now.
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