Unused since original import of VC5.
Fixes: ade416d023 ("broadcom: Add VC5 NIR compiler.")
Signed-off-by: Andreas Boll <andreas.boll.dev@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
The v3d_qpu_writes_r*() were only checking for fixed-function accumulator
writes, not normal ALU writes to those regs.
Fixes fs-discard-exit-2 on simulation (but not HW).
The ordering of the values was even less obvious than I thought, with both
the mip filter and the min filter being in different bits depending on
whether the mip filter is none.
Fixes piglit fs-textureLod-miplevels.shader_test
Groups containing fields smaller than a byte probably not being decoded
correctly. For example:
<group count="32" start="32" size="4">
<field name="Vertex Element Enables" start="0" end="3" type="uint"/>
</group>
gen_field_iterator_next would properly walk over each element of the
array, incrementing group_iter. However, the code to print the actual
values only considered iter->field->start/end, which are 0 and 3 in the
above example. So it would always fetch bits 3:0 of the current byte,
printing the same value over and over.
Cc: Eric Anholt <eric@anholt.net>
The output formats are consistent with their channels appearing from low
to high in their name. Textures are interpreted the same way, but their
names may have the channels swapped around. I'm retaining the texture
names so that we are consistent with the documentation, but I want to
leave a warning for others.
In the case of fneg(0.0), we were getting back 0.0 instead of -0.0. We
were also needing an immediate 0 value for ineg, when there's an opcode to
do the job properly.
Fixes fs-floatBitsToInt-neg.shader_test.
The HW has no native sampler support for multisample textures, but since
we only need to support txf_ms and the layout is UIF, we just need to
scale up the texcoords and then add in the sample.
This drops the old TEXTURE_MSAA_ADDR special uniform, since we're treating
MSAA textures as textures, rather than basically texbos like VC4 had to.
We were handing the intra-byte padding fine, but with a 24-bit address
(bottom 8 bits implied 0) we would end up off by 8 bytes in our shift,
impacting vc5's load/store general packets (all other packets we have had
<8 bits of padding).
We only have 2x16 unpacking in our ALUs. To enable this, we also need
lower_fdiv for its new instructions, which had been handled at a higher
level previously.
I already had the texture's wrapping set up to use different behavior for
nearest or linear, so we just needed to saturate the coordinates in linear
mode to get the "proper" blend between the edge and border values.
A bit of spec text suggested that (like vc4) condition codes should be
used for discards, and the simulator was fine with it, but the 7268
disagrees and you have to use SETMSF instead or the color comes through.
Fixes glsl-fs-discard-01 and many of the interpolation-with-clipping
tests.
We don't have native instructions for them, so set up the lowering. Once
we support the bfi instructions that get generated, they should start
actually working.
v2: Default vc5 to off, since it requires the simulator currently. Add
missing dep on the XML generation from libbroadcom_vc5.
Reviewed-by: Dylan Baker <dylan@pnwbakers.com> (v1)
The HW will halt when you hit a HALT packet, or when you hit the end
address. Tell CLIF if there's an end address is so that it can stop
correctly. (There was usually a 0 byte after the CL, so it would stop
anyway).
In order to keep early-Z from writing early in a discard shader, you need
to set the "modifies Z" bit in the shader state (which the new
prog_data.discards will indicate). Then, in the shader we do a TLB write
to make Z passthrough happen (the QPU result is ignored, so we use a NULL
source).
These existed so I could unpack just the sub-id field to switch on in the
old manual CLIF dumper. The new codegen handles sub-id automatically, but
only if these stub packets aren't there with an implicit sub-id=0.
This is a pretty straightforward fork of VC4's NIR compiler to VC5. The
condition codes, registers, and I/O have all changed, making the backend
hard to share, though their heritage is still recognizable.
v2: Move to src/broadcom/compiler to match intel's layout, rename more
"vc5" to "v3d", rename QIR to VIR ("V3D IR") to avoid symbol conflicts
with vc4, use new v3d_debug header, add compiler init/free functions,
do texture swizzling in NIR to allow optimization.
