This commit only documents the current behavior, even if that behavior
is not the behavior preferred by the relevant specs.
In SPIR-V, there are two flavors of the sign instruction, and each lives
in an extended instruction set. The GLSL.std.450 FSign instruction is
defined as:
Result is 1.0 if x > 0, 0.0 if x = 0, or -1.0 if x < 0.
This also matches the GLSL 4.60 definition.
However, the OpenCL.ExtendedInstructionSet.100 sign instruction is
defined as:
Returns 1.0 if x > 0, -0.0 if x = -0.0, +0.0 if x = +0.0, or -1.0 if
x < 0. Returns 0.0 if x is a NaN.
There are two differences. Each treats -0.0 differently, and each also
treats NaN differently. Specifically, GLSL.std.450 FSign does not
define any specific behavior for NaN.
There has been some discussion in Khronos about the NaN behavior of
GLSL.std.450 FSign. As part of that discussion, I did some research
into how we treat NaN for nir_op_fsign, and this commit just captures
some of those notes.
v2: Document the expected behavior of nir_op_fsign more thoroughly.
Suggested by Rhys. Note that the current implementation of constant
folding does not produce the expected result for NaN. Suggested by
Caio.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> [v1]
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6358>
Drivers aren't allowed to ignore start with user index buffers anymore.
This is required by the new fast path where mesa/main is using pipe_draw_info.
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
index_bias is undefined if index_size == 0.
index bounds are undefined if index_bounds_valid == false.
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
index_bias is undefined if index_size == 0.
index bounds are undefined if index_bounds_valid == false.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
To remove PIPE_CAP checking in the common code.
It's better if drivers lower multi draws even if the hardware doesn't
support it beause the multi draw loop can be moved deeper into the driver
to remove more overhead.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
We use memcmp when combining back-to-back draws into a multi draw.
Clear vertices_per_patch if it's irrelevant to help memcmp return
a match.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
to be used by st/mesa to get index bounds because it won't have _mesa_prim
with the new draw interface.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
mesa/main will fill pipe_draw_info but it has no access to pipe_resources,
so we need gl_buffer_object here.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7679>
This extension dates to 2015 not 2018, and since there's only one
texture format to check for the additional GL_TRUE is meaningless.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8060>
This just prevents us from emitting some caps a bunch of times. Since
there's few caps in use, it seems reasonable to use this mechanism for
all caps, as it's unlikely to add up to anything worth worrying about.
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8312>
Fixes the following building error:
clang: error: no such file or directory: 'external/mesa/src/panfrost/bifrost/bi_tables.c'
clang: error: no input files
Fixes: b691aeaacf ("pan/bi: Remove old IR opcode table")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8294>
Fixes the following building error:
clang: error: no such file or directory: 'external/mesa/src/panfrost/bifrost/bi_special.c'
clang: error: no input files
Fixes: e5ec0dc183 ("pan/bi: Remove NIR->old IR")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8294>
Fixes the following building error:
clang: error: no such file or directory: 'external/mesa/src/panfrost/bifrost/bi_lower_combine.c'
clang: error: no input files
Fixes: 8b0d0a931b ("pan/bi: Remove combine lowering")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8294>
Ian Romanick
Andrii Simiklit
Marek Olšák
Jesse Natalie
Adam Jackson
Mike Blumenkrantz
Erik Faye-Lund
Mauro Rossi