Mesa (staging/19.3): Revert "gallium: Fix big-endian addressing of non-bitmask array formats."
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Tue Feb 11 17:47:46 UTC 2020
Module: Mesa
Branch: staging/19.3
Commit: 8f630dc7c5483a75fe8fd890be03586dfa79779b
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=8f630dc7c5483a75fe8fd890be03586dfa79779b
Author: Eric Anholt <eric at anholt.net>
Date: Wed Feb 5 10:38:57 2020 -0800
Revert "gallium: Fix big-endian addressing of non-bitmask array formats."
This reverts the functional part of commit
d17ff2f7f1864c81c1e00d04baf20f953c6d276a, leaving the unit test for
mesa/pipe agreement on what's an array.
The issue is that the util_channel_desc.shift values on array formats are
not used for bit addressing in memory, they're bit addressing within a
word treating a pixel of the format as a native type, as seen by
llvmpipe's use of the values to do shifts (see
lp_build_unpack_arith_rgba_aos() for example). This means the values are
nonsensical for 3-byte RGB, but then llvmpipe doesn't expose those formats
so it works out.
I still want to clean up our big-endian format handling at some point, but
let's fix the s390x regression first, sort out our format unit tests in
CI, then be able to refactor with confidence.
Fixes: d17ff2f7f186 ("gallium: Fix big-endian addressing of non-bitmask array formats.")
Closes: #2472
Acked-by: Marek Olšák <marek.olsak at amd.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3721>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3721>
(cherry picked from commit 1886dbfe7362baa221009371434f158b97183164)
---
.pick_status.json | 2 +-
src/gallium/auxiliary/util/u_format_parse.py | 23 ++++++-----------------
2 files changed, 7 insertions(+), 18 deletions(-)
diff --git a/.pick_status.json b/.pick_status.json
index c45df7b02a6..5d320ee9517 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -85,7 +85,7 @@
"description": "Revert \"gallium: Fix big-endian addressing of non-bitmask array formats.\"",
"nominated": true,
"nomination_type": 1,
- "resolution": 0,
+ "resolution": 1,
"master_sha": null,
"because_sha": "d17ff2f7f1864c81c1e00d04baf20f953c6d276a"
},
diff --git a/src/gallium/auxiliary/util/u_format_parse.py b/src/gallium/auxiliary/util/u_format_parse.py
index 541ae69d4dc..b9627055cda 100644
--- a/src/gallium/auxiliary/util/u_format_parse.py
+++ b/src/gallium/auxiliary/util/u_format_parse.py
@@ -379,27 +379,16 @@ def parse(filename):
channel.shift = le_shift
le_shift += channel.size
+ be_shift = 0
+ for channel in be_channels[3::-1]:
+ channel.shift = be_shift
+ be_shift += channel.size
+
+ assert le_shift == be_shift
for i in range(4):
assert (le_swizzles[i] != SWIZZLE_NONE) == (be_swizzles[i] != SWIZZLE_NONE)
format = Format(name, layout, block_width, block_height, block_depth, le_channels, le_swizzles, be_channels, be_swizzles, colorspace)
-
- if format.is_array() and not format.is_bitmask():
- # Formats accessed as arrays by the pack functions (R32G32_FLOAT or
- # R8G8B8_UNORM, for example) should not be channel-ordering-reversed
- # for BE.
- # Note that __eq__ on channels ignores .shift!
- assert(format.be_channels == format.le_channels)
- assert(format.be_swizzles == format.le_swizzles)
- format.be_channels = format.le_channels
- else:
- be_shift = 0
- for channel in format.be_channels[3::-1]:
- channel.shift = be_shift
- be_shift += channel.size
-
- assert le_shift == be_shift
-
formats.append(format)
return formats
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