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e8d25b50c9
This is counter-intuitive, but required for correct operation when
CSEL.i32 takes a 1-bit (stored 16-bit) boolean argument. The impedance
mismatch ultimately is between CSEL.b32 (nir's bcsel, nonexistant in the
hardware) and the lowering CSEL.i32. However, a similar problem exists
even with MUX.i32 which lacks a good way of zero/sign-extending
booleans.
Cherry-picked from my Valhall branch though the issue also affects
Bifrost. Fixes piglit shaders@glsl-vs-if-bool on Bifrost.
Unfortunately, shader-db is quite unhappy :-(
The proper fix is to use lower_bool_to_bitsize, but that can't be
backported to mesa-stable.
total instructions in shared programs: 157539 -> 158953 (0.90%)
instructions in affected programs: 55621 -> 57035 (2.54%)
helped: 2
HURT: 259
helped stats (abs) min: 2.0 max: 2.0 x̄: 2.00 x̃: 2
helped stats (rel) min: 2.11% max: 2.67% x̄: 2.39% x̃: 2.39%
HURT stats (abs) min: 1.0 max: 40.0 x̄: 5.47 x̃: 2
HURT stats (rel) min: 0.36% max: 16.13% x̄: 2.55% x̃: 1.59%
95% mean confidence interval for instructions value: 4.44 6.40
95% mean confidence interval for instructions %-change: 2.21% 2.82%
Instructions are HURT.
total tuples in shared programs: 132322 -> 132907 (0.44%)
tuples in affected programs: 31806 -> 32391 (1.84%)
helped: 5
HURT: 152
helped stats (abs) min: 1.0 max: 2.0 x̄: 1.40 x̃: 1
helped stats (rel) min: 0.39% max: 3.03% x̄: 1.70% x̃: 1.61%
HURT stats (abs) min: 1.0 max: 42.0 x̄: 3.89 x̃: 2
HURT stats (rel) min: 0.29% max: 18.18% x̄: 2.50% x̃: 1.79%
95% mean confidence interval for tuples value: 2.88 4.58
95% mean confidence interval for tuples %-change: 1.87% 2.85%
Tuples are HURT.
total clauses in shared programs: 28672 -> 28698 (0.09%)
clauses in affected programs: 869 -> 895 (2.99%)
helped: 1
HURT: 24
helped stats (abs) min: 1.0 max: 1.0 x̄: 1.00 x̃: 1
helped stats (rel) min: 5.88% max: 5.88% x̄: 5.88% x̃: 5.88%
HURT stats (abs) min: 1.0 max: 2.0 x̄: 1.12 x̃: 1
HURT stats (rel) min: 0.49% max: 33.33% x̄: 8.46% x̃: 3.59%
95% mean confidence interval for clauses value: 0.82 1.26
95% mean confidence interval for clauses %-change: 3.84% 11.93%
Clauses are HURT.
total cycles in shared programs: 15119.04 -> 15137.88 (0.12%)
cycles in affected programs: 922.87 -> 941.71 (2.04%)
helped: 4
HURT: 79
helped stats (abs) min: 0.0416669999999999 max: 0.0833330000000001 x̄: 0.05 x̃: 0
helped stats (rel) min: 0.40% max: 3.17% x̄: 1.57% x̃: 1.35%
HURT stats (abs) min: 0.041665999999999315 max: 1.75 x̄: 0.24 x̃: 0
HURT stats (rel) min: 0.30% max: 20.00% x̄: 2.83% x̃: 2.12%
95% mean confidence interval for cycles value: 0.17 0.29
95% mean confidence interval for cycles %-change: 1.86% 3.37%
Cycles are HURT.
total arith in shared programs: 4922.71 -> 4947.71 (0.51%)
arith in affected programs: 1423.79 -> 1448.79 (1.76%)
helped: 5
HURT: 177
helped stats (abs) min: 0.0416669999999999 max: 0.0833330000000001 x̄: 0.06 x̃: 0
helped stats (rel) min: 0.40% max: 3.17% x̄: 1.82% x̃: 1.67%
HURT stats (abs) min: 0.041665999999999315 max: 1.75 x̄: 0.14 x̃: 0
HURT stats (rel) min: 0.30% max: 22.22% x̄: 2.50% x̃: 1.52%
95% mean confidence interval for arith value: 0.11 0.17
95% mean confidence interval for arith %-change: 1.86% 2.90%
Arith are HURT.
total quadwords in shared programs: 120605 -> 120956 (0.29%)
quadwords in affected programs: 26535 -> 26886 (1.32%)
helped: 6
HURT: 143
helped stats (abs) min: 1.0 max: 7.0 x̄: 2.83 x̃: 1
helped stats (rel) min: 0.93% max: 6.33% x̄: 2.29% x̃: 1.71%
HURT stats (abs) min: 1.0 max: 21.0 x̄: 2.57 x̃: 2
HURT stats (rel) min: 0.34% max: 13.79% x̄: 2.02% x̃: 1.22%
95% mean confidence interval for quadwords value: 1.86 2.86
95% mean confidence interval for quadwords %-change: 1.45% 2.24%
Quadwords are HURT.
total threads in shared programs: 4670 -> 4669 (-0.02%)
threads in affected programs: 2 -> 1 (-50.00%)
helped: 0
HURT: 1
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14576>
(cherry picked from commit
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| amd | ||
| android_stub | ||
| asahi | ||
| broadcom | ||
| compiler | ||
| drm-shim | ||
| egl | ||
| etnaviv | ||
| freedreno | ||
| gallium | ||
| gbm | ||
| getopt | ||
| glx | ||
| gtest | ||
| hgl | ||
| imgui | ||
| intel | ||
| loader | ||
| mapi | ||
| mesa | ||
| microsoft | ||
| nouveau | ||
| panfrost | ||
| tool | ||
| util | ||
| virtio | ||
| vulkan | ||
| meson.build | ||