MOV_INDIRECT picks one lane from the src[0] and moves it to all lanes
in the destination. Even if we split the instruction, src[0] should
remain identical.
Noticed this while trying to use this instruction in SIMD32. All
current use cases are limited to SIMD8 shaders (or SIMD16 on Xe2). Or
maybe in SIMD32 but with a uniform src[0]. That's we think we've never
seen the issue so far.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28036>
These were removed with Icelake. While they technically still exist on
Skylake, which this compiler supports, we have never used these opcodes
in the 14 years we could have done so. So just scrap them.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29665>
Running
KHR-GL46.sparse_texture_clamp_tests.SparseTextureClampLookupColor test
with Zink on Anv we run into an assert :
assert(inst->mlen <= MAX_SAMPLER_MESSAGE_SIZE * reg_unit(devinfo));
Turns out we've not covered all the cases in the SIMD lowering.
It's a bit of a shame to have both files reproduce the same logic.
Will try to think of a better way to extract the layout of the a send
message but that'll be a much bigger rework.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29118>
Both of these helpers do the same thing. We now have brw_type_size_bits
and brw_type_size_bytes and can use whichever makes sense in that place.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28847>
We no longer support the old LINE+MAC lowering, and we already lower
this to MAD in NIR on Gfx11+, so the LINTERP virtual opcode always
corresponds the PLN. The only catch is that LINTERP's operands are
reversed from PLN, so we have to switch them.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28705>
BSpec 56797:
Math operation rules when half-floats are used on both source and
destination operands and both source and destinations are packed.
The execution size must be 16.
Signed-off-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27235>
On Gfx4, we had to emulate SIMD8 texturing with SIMD16 for some message
types. This ceased to be a thing with Gfx5 and hasn't come up again.
So, we can simply assert that we are truly "SIMD splitting", and assume
that the lowered size is smaller than the original instruction size.
This avoids some mental complexity as we can always think of the split
instructions as taking apart, operating on, and recombining subsets of
the original values.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27959>
When lower_simd_width() encounters an instruction that needs a larger
SIMD, for example SHADER_OPCODE_TXS_LOGICAL in Gfx4 needs at least
SIMD16. In this case the builder needs to be at least as large as
max_width, otherwise the group() setup will assert.
Turns out this did not assert before "by accident", since it was
relying on the default fs_visitor builder that had a dispatch width of 64,
a bogus placeholder value, expected not to be used.
However, when we changed the code to remove that builder (and the bogus
value), we created a new builder in the pass shader dispatch_width --
which work fine except in the case where we want to "lower" the SIMD above
the shader dispatch width. The fix is to also consider the already
calculated max_width when creating the builder.
Fixes: 5b8ec015f2 ("intel/compiler: Don't use fs_visitor::bld in remaining places")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10338
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27782>
We first generate the logical opcodes, and these days fully lower to
SHADER_OPCODE_SEND. In the past, we lowered to a non-logical variant
and handled that in the generator. These days, we were just using the
non-logical opcodes as an awkward intermediate opcode change during
the lowering...which isn't really necessary at all.
This patch eliminates them by using the original logical opcodes.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27908>
