This commit introduces a new way to zero-init variables but keep the
old one to not break any existing behavior.
With this change GLSLZeroInit becomes an integer, with the following
possible values:
- 0: no 0 init
- 1: current behavior
- 2: new behavior. Similar to 1, except ir_var_function_out type are
0 initialized but ir_var_shader_out.
The rationale behind 2 is: zero initializing ir_var_shader_out can
prevent some optimization where out variables are completely eliminated
when not written to.
On the other hand, zero initializing "ir_var_function_out" has no
effect on correct shaders but typically helps shadertoy since the main
function is:
void mainImage(out vec4 fragColor) { ... }
So with this change we're sure that fragColor will always get a value.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4607>
Skip most of _mesa_update_vao_derived_arrays if the VAO is not static.
Drivers need a separate codepath for this.
This increases performance by 7% with glthread and the game "torcs".
The reason is that glthread uploads vertices and sets vertex buffers
every draw call, so the overhead is very noticable. glthread doesn't
hide the overhead, because the driver thread is the busiest thread.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4314>
This works by finding the first rvalue that it can lower using an
ir_rvalue_visitor. In that case it adds a conversion to float16
after each rvalue and a conversion back to float before storing
the assignment.
Also it uses a set to keep track of rvalues that have been
lowred already. The handle_rvalue method of the rvalue visitor doesn’t
provide any way to stop iteration. If we handle a value in
find_precision_visitor we want to be able to stop it from descending into
the lowered rvalue again.
Additionally this pass disallows converting nodes containing non-float.
The can_lower_rvalue function explicitly excludes any branches
that have non-float types except bools. This avoids the need to have
special handling for functions that convert to int or double.
Co-authored-by: Hyunjun Ko <zzoon@igalia.com>
v2. Adds lowering for texture samples
v3. Instead of checking whether each node can be lowered while walking the
tree, a separate tree walk is now done to check all of the nodes in a
single pass. The lowerable nodes are added to a set which is checked
during find_precision_visitor instead of calling can_lower_rvalue.
v4. Move the special case for temporaries to find_lowerable_rvalues. This
needs to be handled while checking for lowerable rvalues so that any
later dereferences of the variable will see the right precision.
v5. Add an override to visit ir_call instructions and apply the same
technique to override the precision of the temporary variable in the
same way as done for builtin temporaries and ir_assignment calls.
v6. Changes the pass so that it doesn’t need to lower an entire subtree in
order do perform a lowering. Instead, certain instructions can be
marked as being indepedent of their child instructions. For example,
this is the case with array dereferences. The precision of the array
index doesn’t have any bearing on whether things using the result of
the array deref can be lowered.
Now, only toplevel lowerable nodes are added to the lowerable_rvalues
instead instead of additionally adding all of the subnodes.
It now also only needs one hash table instead of two.
v7. Don’t try to lower sampler types. Instead, the sample instruction is
now treated as an independent point where the result of the sample can
be used in a lowered section. The precision of the sampler type
determines the precision of the sample instruction. This also means
the coordinates to the sampler can be lowered.
v8. Use f2fmp instead of f2f16.
v9. Disable lowering derivatives calcualtions, which might not work
properly on some hw backends.
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3885>
Adding a new CSO proved to be fairly difficult especially because this
extension affect draw/dispatch/blit alike.
Instead this change passes the state of the noop into the entry points
emitting the operations affected.
v2: Fix assert in default pipe caps
v3: Drop whitespace changes (Ken)
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/2964>
Eric recently added PIPE_FORMAT_FXT1_RGB[A] as part of his format
unification work. This was really most of the work of implementing
the extension. We just need to handle it in a couple of places and
expose the extension.
v2: Reject the new formats in llvmpipe_is_format_supported to prevent
crashes because it doesn't know how to handle the new formats.
Reviewed-by: Marek Olšák <marek.olsak@amd.com> [v1]
Reviewed-by: Eric Anholt <eric@anholt.net> [v1]
According to the OES_geometry_shader spec, section Dependencies:
"OpenGL ES 3.1 and OpenGL ES Shading Language 3.10
are required."
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
nvc0 and I assume radeonsi as well hit an assert inside glsl_to_tgsi as atan
instructions get inserted into the shader.
Fixes: cece947a8d ("glsl/builtin: Add alternate versions of atan using new ops")
Cc: Neil Roberts <nroberts@igalia.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
To enable EXT_demote_to_helper_invocation:
This extension adds a "demote" keyword that is similar to "discard" but
only suppresses subsequent writes and outputs to the framebuffer, and
does not terminate the execution of the invocation. For the remainder
of the execution, the invocation is "demoted" to act like a helper
invocation.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
In case the GLSL version is 130 or higher, we've already enabled
ARB_shader_bit_encoding a bit earlier in this same function. So this
condition will always be true.
Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
