We mixed up component_lo and full, which made it appear that we had
less freedom in RA than we actually do. Fix this to fix some
disassemblies as well as prepare for RA with the bias field.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Following the RA work, we apply the same technique to eliminate the move
to r27 when loading cubemaps.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This reverts commit 4508f43eed, which
broke a bunch of dEQP tests (e.g. in
dEQP-GLES2.functional.draw.draw_arrays.*)
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
We add a new opt pass fusing perspective projection with varyings. Minor
win..? We don't combine non-varying projections, since if we're too
agressive, the extra load/store traffic will hurt us so it's not really
a win in practice.
total instructions in shared programs: 3915 -> 3913 (-0.05%)
instructions in affected programs: 76 -> 74 (-2.63%)
helped: 1
HURT: 0
total bundles in shared programs: 2520 -> 2519 (-0.04%)
bundles in affected programs: 46 -> 45 (-2.17%)
helped: 1
HURT: 0
total quadwords in shared programs: 4027 -> 4025 (-0.05%)
quadwords in affected programs: 80 -> 78 (-2.50%)
helped: 1
HURT: 0
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
We don't use it yet, since it's actually a shader-db regression. This is
primarily helpful as an intermediate step for attaching projection to
varyings.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
While load/store ops like st_vary can take an argument in either
r26/r27, ops like those for perspective projection must specifically
take their argument in r27.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
The load/store pipes can't take a uniform register in, so an explicit
move is necessary here.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Given the constraints on special registers, we add a helper for lowering
these by inserting moves (copies) where needed to satsify the ISA
constraints.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
We generalize the constant emission helper used in fragment writeout as
we'll also need it for vertex outputs.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This ensures the rules for accessing special register classes are
satisfied. This is asserted as a prepass should have lowered offending
uses to something satisfying these rules. Special register classes are
*not* work registers and cannot be used for RMW operations; they are
essentially 1-way pipes straight into/from fixed-function logic in the
shader cores.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
We reuse the same register spilling mechanism as for work->memory to
spill special->work registers, e.g. to allow writing out more than 2
vec4 varyings (without better scheduling anyway).
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This does not yet support special->work spilling, nor does it support
multiclass breakup. These corner cases will be handled in succeeding
commits.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Checks for x/xy/xyz/xyzw style swizzles (slightly more general but you
get the idea).
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This should save a lot of per-compile time by using the RA the way it's
actually supposed to be used.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This was disabled to permit regression-free RA work. Now that the spill
code is in place, we can reenable, with some caveats about efficacy.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Pipe through the number of bytes of spilled memory used from the
compiler into the main driver, where it will be used to allocate the
Thread Local Storage buffer.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
We just use the pointers of the midgard_block*, which is crude, but it
gets the point across and will help debug successor related issues.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Now that we run RA in a loop, before each iteration after a failed
allocation we choose a spill node and spill it to Thread Local Storage
using st_int4/ld_int4 instructions (for spills and fills respectively).
This allows us to compile complex shaders that normally would not fit
within the 16 work register limits, although it comes at a fairly steep
performance penalty.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
If we write to an index before reading it, the old copy we're checking
liveness for isn't live in this block, even if it does get read later.
Fixes abnormally high register pressure in shaders with loops.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Midgard bundles contain a tag, as well as a copy of the tag of the next
bundle to facilitate prefetch. Do some simple static analysis to detect
certain tag errors (particularly on shaders without branching).
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Rather than rewriting an index away across the whole block, we expose
finer (per-instruction) granularity for rewrites.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
These are used to load/store from Thread Local Storage, which is memory
allocated per-thread (corresponding to ctx->scratchpad in the command
stream) and used for register spilling.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
It was a crazy idea that didn't pan out. We're better served by a good
copyprop pass. It's also unused now.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Rather than creating either a load or a uniform register read with a
fixed beginning offset, we always create a load and then promote to a
uniform register later. This will allow us to promote in a register
pressure aware manner.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This will allow us to insert instructions as a result of register
allocation, permitting spilling to be implemented. As a side effect,
with the assert commented out this would fix a bunch of glamor crashes
(due to RA failures) so MATE becomes useable.
Ideally we'll have scheduling or RA actually sorted out before the
branch point but if not this gives us a one-line out to get X working...
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
It could be midgard_outmod_float or midgard_outmod_int; don't assume
it's one or the other. Fixes -Wenum-conversion warnings.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
A bunch of these are from asserts not being compiled in 32-bit mode
(once Erik's ASSERTABLE stuff is merged, we'll want to switch).
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This reverts commit 812ce2ce9e.
We massively regress with the reverted patch. So in the meantime, take
it out.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
It's not clear the hardware really has a maximum which confuses dEQP;
clamp to whatever we report as our maximum.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
In preparation for a Panfrost-based non-Gallium driver (maybe
Vulkan...?), hoist everything except for the Gallium driver into a
shared src/panfrost. Practically, that means the compilers, the headers,
and pandecode.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig
Tomeu Vizoso