These allow avoiding dead-locks in non-compliant applications that
execute barriers under non-uniform control flow. They're not expected
to have any major disadvantage so let's enable them unconditionally.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29562>
This flag is mostly redundant with uses_discard and was only
introduced to implement demote with LLVM when it didn't have
that intrinsic.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27617>
The semantics of discard differ between GLSL and HLSL and
their various implementations. Subsequently, numerous application
bugs occurred and SPV_EXT_demote_to_helper_invocation was written
in order to clarify the behavior. In NIR, we now have 3 different
intrinsics for 2 things, and while demote and terminate have clear
semantics, discard still doesn't and can mean either of the two.
This patch entirely removes nir_intrinsic_discard and
nir_intrinsic_discard_if and replaces all occurences either with
nir_intrinsic_terminate{_if} or nir_intrinsic_demote{_if} in the
case that the NIR option 'discard_is_demote' is being set.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27617>
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>
According to PRMs:
"All parameters are of type IEEE_Float, except those in the The ld*,
resinfo, and the offu, offv of the gather4_po[_c] instruction message
types, which are of type signed integer."
Currently, we load parameters with the correct types, but use them as send
sources with the default float type, which may confuse passes downstream.
Fix this by actually storing the retyped sources.
Cc: mesa-stable
Signed-off-by: Sviatoslav Peleshko <sviatoslav.peleshko@globallogic.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29581>
According to PRMs:
"All parameters are of type IEEE_Float, except those in the The ld*,
resinfo, and the offu, offv of the gather4_po[_c] instruction message
types, which are of type signed integer."
Currently, we load parameters with the correct types, but use them as send
sources with the default float type, which may confuse passes downstream.
Fix this by actually storing the retyped sources.
Cc: mesa-stable
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/11118
Signed-off-by: Sviatoslav Peleshko <sviatoslav.peleshko@globallogic.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29581>
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>
This will let us reuse the bulk of this code in a new copy propagation
pass without replicating it. We retain a wrapper function for dealing
with ACP entries, which the new pass won't have.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29624>
This was for Sandybridge's IF with embedded comparison, which only
existed for a single generation of hardware. Since the compiler fork,
we no longer support Sandybridge here.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29624>
We were missing the following "newer" fields:
- ex_desc
- predicate_trivial
- sdepth
- rcount
- writes_accumulator
- no_dd_clear
- no_dd_check
- check_tdr
- send_is_volatile
- send_ex_desc_scratch
- send_ex_bso
- last_rt
- keep_payload_trailing_zeroes
- has_packed_lod_ai_src
We can actually just check ex_desc and the new "bits" union to handle
most of them with fewer checks.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29624>
I want to be able to hash an fs_reg, including all the brw_reg fields.
It's easiest to do this if I can use the "bits" union field that
incorporates many of the other ones.
We also move the using declaration for "nr" down because that field was
moved to the second section a while back.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29624>
Pass in the nir_src and check if it's constant, handling it via CPU-side
arithmetic instead of emitting instructions. While we can constant fold
these via our optimization passes, we have to do opt_algebraic to fold
the binary operation with constant sources into a MOV of an immediate,
then opt_copy_propagation to put it in the next expression, and so on,
until the entire expression is folded. This can take several iterations
of the optimization loop, which is inefficient.
For example, gfxbench5/aztec-ruins/normal/7 has load/store_scratch
intrinsics with constant sources, and this patch removes a number of
optimization passes according to INTEL_DEBUG=optimizer.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29624>
Geometry shaders write outputs multiple times, with EmitVertex()
between them. The value of output variables becomes undefined after
calling EmitVertex(), so we don't need to preserve those. This lets
us recreate new registers after each EmitVertex(), assuming we aren't
in control flow, allowing them to have separate live ranges. It also
means that those registers are more likely to be written once, rather
than having multiple writes, which can make optimization easier.
This is pretty much a total hack, but it's helpful.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29624>
There doesn't seem to be a restriction on the mentioned data types on
LNL anymore. Default to a maximum exec size of SIMD16.
This patch fixes dEQP-VK.subgroups.shuffle.framebuffer.* on LNL
Signed-off-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29504>
For 16-bit data type, we are padding 16-bit and using 32-bit data type,
so we need to account for the padded portion while calculating the
size_written.
Rework: (Rohan)
- Drop unnecessary fs_builder instance
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29271>
For 16-bit data type, we are padding 16-bit and using 32-bit data type,
so we need to account for the padded portion while calculating the
size_written.
Rework: (Rohan)
- Drop unnecessary fs_builder instance
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29271>
Removed mention of Wa_* when referencing an intended harware behavior
since version 12. This will prevent the erroneous usage of the
`intel_needs_workaround` in the future.
Reviewed-by: Mark Janes <markjanes@swizzler.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29559>
For 16-bit float case handling, intermediate destination register is
already 32-bit wide, we don't have to retype it to 32-bit.
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29506>
This opcode gets translated to 2 ALU instructions with dependency ALU
stall. This change reproduces the FS_OPCODE_PACK_HALF_2x16_SPLIT
values which is another opcode that generates 2 instructions.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29446>
In 2c65d90bc8 I forgot to add the new SHADER_OPCODE_READ_MASK_REG
opcode to the list of barrier instruction in the scheduler. Let's just
use a single opcode for all ARF registers that need special
scoreboarding and put the register as source (nicer for the debug
output).
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 2c65d90bc8 ("intel/brw: ensure find_live_channel don't access arch register without sync")
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29446>
v2: Add some comments explaining some of the nuance of the shift
optimizations. Fix a bug in the shift count calculation of the upper
32-bits. Move the @64 from the variable to the opcode. All suggested
by Jordan.
No shader-db changes on any Intel platform.
fossil-db:
Meteor Lake and DG2 had similar results. (Meteor Lake shown)
Totals:
Instrs: 154507026 -> 154506576 (-0.00%)
Cycle count: 17436298868 -> 17436295016 (-0.00%)
Max live registers: 32635309 -> 32635297 (-0.00%)
Totals from 42 (0.01% of 632575) affected shaders:
Instrs: 5616 -> 5166 (-8.01%)
Cycle count: 133680 -> 129828 (-2.88%)
Max live registers: 1158 -> 1146 (-1.04%)
No fossil-db changes on any other Intel platform.
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29148>
This allows us to not generate 64-bit iadd3 on Intel but continue
generating it for NVIDIA.
No shader-db or fossil-db changes.
v2: Add nir_lower_iadd3_64 flag so we can continue to generate 64-bit
iadd3 on NVIDIA platforms.
v3: s/bit_size == 64/s == 64/. This cut-and-paste bug prevented any of
the optimizations from ever occuring.
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29148>
It doesn't make sense to have two sets of opcodes for this when all backends
that support the flush_to_zero variant just rely on the global floating point
mode anyway.
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29433>
Running intel_clc as part of the build doesn't need to issue this
warning.
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29445>
Gfx11-12 can support SLM block loads via OWord Block Load messages
(notably, the aligned version, not the unaligned version).
A while back we deleted the SHADER_OPCODE_OWORD_BLOCK_READ opcode.
Rather than bring it back, we continue using UNALIGNED_OWORD_BLOCK_READ
for SLM block access (like we do for SSBOs) but switch it over to the
aligned variant when lowering logical sends. We do ensure the alignment
is at least 16B, however. This is ugly, but it's probably not worth
bringing back a whole extra opcode for a legacy HDC block load quirk.
References: BSpec 47652 and 1689
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/9960
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29429>
This functions were inlined in a header and duplicated between brw and
elk.
That would be enough reasons to move to a C file but next patches
will add more code to support Xe2 platforms, what would cause more
code to be inlined, duplicating even more code and increasing lib
size.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28910>
Another architecture register that requires some care before reading.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 49ee3ae9e8 ("intel/compiler: Lower FIND_[LAST_]LIVE_CHANNEL in IR on Gfx8+")
Tested-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29319>
Fixes failures of CTS tests that currently end up emitting 64-bit
integer ADDs with saturation, which isn't supported by the hardware.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28283>
Note that some previously-supported 64-bit integer operations have
been removed from the hardware, so we need to instruct NIR to lower
them.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28283>
