First, this undoes commit e503af4baa
so we use iround() in lp_build_nearest_mip_level().
Second, in lp_build_sample_general() we need to check if we're sampling
a cube map before anything else. Choose the cube face and then recompute
the partial derivatives of (S,T) with respect to the chosen cube face.
Before, we were using the directional (S,T,R) derivatives to compute
the LOD.
Third, work around an apparent bug in LLVM 2.7 where setting the lod
variable to a const(0) value results in bad x86 code. See comments in
the code.
Uses of the bits for allocation are offset by 16, and
VERT_BIT_GENERIC0 already has the 16 offset. As a result, it was
preventing the wrong thing from being allocated.
rcp of an integer value did not produce the result you're looking for.
Instead, do the a * rcp(b) as float and truncate after. This mostly
fixes glsl-fs-loop-nested.
This allows function inlining making the following tests work even
without function calls implemented:
glsl-fs-functions-2
glsl-fs-functions-3
glsl-vs-functions
glsl-vs-functions-2
glsl-vs-functions-3
glsl-vs-vec4-indexing-5
(Note that those tests were designed to trigger actual function calls,
and this defeats them. However, those testcases ended up catching the
bug in the previous commit.)
The _slang_*_output_name() functions had one too many loop iterations
because of the sentinal end-of-list values in the vertOutput array.
Just use Elements() everywhere.
The Mesa IR needs this to support vector indexing correctly, and
hardware backends such as 915 would want this behavior as well.
Fixes glsl-vs-vec4-indexing-2.
Also handles matrix/vector and vector/matrix multiplication.
Fixes piglit tests const-matrix-multiply-01.frag,
const-matrix-multiply-02.frag, and const-vec-mat.frag.
The test here is slightly different since we need to keep matrix
multiplication separate.
Fixes piglit tests const-vec-scalar-03.frag and const-mat-scalar-03.frag.
The previous table didn't distinguish gl_Color for the VS and FS, so
we would use the FS's attribute index for the VS and read undefined.
This partially fixes glsl-routing to match its behavior on master.
Plus fix minor error in lp_build_iceil() by tweaking the offset value.
And add a bunch of comments for the round(), trunc(), floor(), ceil()
functions.
it was wrong to put this in the fs paths, but it was easier to just
stuff it along the fragment texture sampling paths. the patch
disconnects vertex texture sampling and just maps the textures
before the draw itself and unmaps them after.
