On Gen4 and G45 and earlier, we have to handle weird offsetting to write
to depth and stencil due to a lack of proper depth mipmapping support in
hardware. On Gen6, we have to deal with strange HiZ and stencil
layouts. Prior to Gen9, we also had to do crazy things for stencil
writes because we didn't support GL_ARB_shader_stencil_export and
friends in hardware. However, starting with Gen7 for depth and Gen9 for
stencil, we can easily write out with the "right" hardware. This allows
us to leave HiZ and other compression enabled for blorp_blit() and
blorp_copy() operations.
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3717>
Ever since 95cc5438eb, BLORP has been able to read from HiZ-compressed
depth buffers as long as the sampler supports HiZ. This just makes iris
stop doing the unneeded resolve.
Closes: #2583
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3717>
The old code looks the same as GL driver, but we get things like
pipe_count = {32, 1}, which seems bad.
This uses similar logic as for tiles which produces a balanced pipe_count
width/height.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3142>
So we can debug the IR in memory before code emit has happened. We'd
like to have a complete dump of the IR -- neglecting this with Midgard
was one of those mistakes I've regretted so let's get this right for the
first time around.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
Modeled after the Midgard system. Already we know of two
compiler-visible differences between G52 and G71, so let's keep track so
we can eventually port the compiler to other Bifrost systems.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
These allow translating between the vector I/O and scalar ALUs,
facilitated by an RA dance to ensured contiguous registers are used.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
Requires a new field on bifrost_instruction, as well as a new class
property and a new class for the dedicated swizzle ops.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
A number of opcodes within a class are disambiguated by type/size, and
whether modifiers make sense or not depends on whether the instruction
acts like a float.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
We'll open up a union for class specific data, since this is interesting
only to BI_MINMAX. (And even then...)
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
I don't want to have 20 class-specific structures floating around. So
let's derive them all from a common generic ALU type.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
...along with some helpers to generate indices. The indexing scheme is
mostly a copypaste from Midgard, except we specifically reserve 0 as the
sentinel (midgard uses ~0 for this which has always been a pain point).
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
We're making some pretty dramatic design pivots so this early on it'll
be easier to start from scratch, I think.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
There's a magic bit in preload_regs which controls this. It doesn't
appear to be supported on G71 but it is on G52. I'd guess G72 supports
it too but I don't have a way to check this.
Needless to say, we'll need a quirks database for this.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
