Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: c7b5b3ef99964513d4572a5c4196b83fcff9b53a
https://github.com/WebKit/WebKit/commit/c7b5b3ef99964513d4572a5c4196b83fcff9b53a
Author: Angelos Oikonomopoulos <[email protected]>
Date: 2024-07-31 (Wed, 31 Jul 2024)
Changed paths:
M Source/JavaScriptCore/assembler/CPU.h
M Source/JavaScriptCore/b3/B3LowerInt64.cpp
M Source/JavaScriptCore/b3/B3LowerToAir32_64.cpp
Log Message:
-----------
Avoid unaligned FP memory accesses on ARMv7
https://bugs.webkit.org/show_bug.cgi?id=277135
Reviewed by Yusuke Suzuki.
On ARMv7 loads/stores of Float/Double values may fault on unaligned
accesses. Currently, the ARMv7 assembler assumes that can't happen
(which is the case for JS). Instead of penalizing JS code, leave that
assumption in and convert B3 loads/stores of Float/Double to use Int32
memory accesses.
* Source/JavaScriptCore/assembler/CPU.h:
(JSC::hasUnalignedFPMemoryAccess):
* Source/JavaScriptCore/b3/B3LowerInt64.cpp:
* Source/JavaScriptCore/b3/B3LowerToAir32_64.cpp:
Canonical link: https://commits.webkit.org/281684@main
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