Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 40c330f75da3abf2cad6a49e51ec81e7adce87e9
https://github.com/WebKit/WebKit/commit/40c330f75da3abf2cad6a49e51ec81e7adce87e9
Author: David Degazio <d_dega...@apple.com>
Date: 2025-03-07 (Fri, 07 Mar 2025)
Changed paths:
M Source/JavaScriptCore/CMakeLists.txt
M Source/JavaScriptCore/jit/CCallHelpers.h
M Source/JavaScriptCore/wasm/WasmBBQJIT.h
Log Message:
-----------
[JSC] Use shuffle algorithm from BBQ for CCallHelpers::shuffleRegisters
https://bugs.webkit.org/show_bug.cgi?id=289306
rdar://146442401
Reviewed by Yusuke Suzuki.
Ports the shuffle algorithm used in the Wasm BBQ JIT to
CCallHelpers::shuffleRegisters.
This results in fewer redundant moves being generated, particularly due to the
fact we
are no longer using swaps to resolve dependent move cycles. Using this
algorithm, we
elide 17234 out of 160180 moves total resolving shuffles on JetStream 2, a 10.7%
reduction, reducing code size and avoiding cheap but redundant work.
* Source/JavaScriptCore/jit/CCallHelpers.h:
(JSC::CCallHelpers::emitShuffleMove):
(JSC::CCallHelpers::scratchRegisterByType<RegisterID>):
(JSC::CCallHelpers::scratchRegisterByType<FPRegisterID>):
(JSC::CCallHelpers::shuffleRegisters):
* Source/JavaScriptCore/wasm/WasmBBQJIT.h:
Canonical link: https://commits.webkit.org/291786@main
To unsubscribe from these emails, change your notification settings at
https://github.com/WebKit/WebKit/settings/notifications
_______________________________________________
webkit-changes mailing list
webkit-changes@lists.webkit.org
https://lists.webkit.org/mailman/listinfo/webkit-changes
