Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 73b3a4e9ff46a2be947f0377ccd0919d7efca6c8
https://github.com/WebKit/WebKit/commit/73b3a4e9ff46a2be947f0377ccd0919d7efca6c8
Author: Mikhail R. Gadelha <[email protected]>
Date: 2025-11-12 (Wed, 12 Nov 2025)
Changed paths:
M Source/JavaScriptCore/assembler/ARMv7Assembler.h
M Source/JavaScriptCore/assembler/MacroAssemblerARMv7.h
M Source/JavaScriptCore/wasm/WasmBBQJIT.h
M Source/JavaScriptCore/wasm/WasmBBQJIT32_64.cpp
Log Message:
-----------
[JSC][32-bit] Optimize 64-bit operations in ARMv7 backend
https://bugs.webkit.org/show_bug.cgi?id=302334
Reviewed by Yusuke Suzuki.
Add dedicated backend functions for 64-bit operations with register
aliasing handling and reduced scratch register usage.
Changes:
* Added MUL and MLA instructions to ARMv7Assembler
* Added backend functions: and64, xor64, mul64, compare64, countLeadingZeros64,
countTrailingZeros64
* Optimized add64/sub64 to avoid scratch register when possible
* All functions check for register overlap and only use scratch when necessary
* compare64 optimizes Equal/NotEqual to use single conditional move
* Source/JavaScriptCore/assembler/ARMv7Assembler.h:
(JSC::ARMv7Assembler::mul):
(JSC::ARMv7Assembler::mla):
* Source/JavaScriptCore/assembler/MacroAssemblerARMv7.h:
(JSC::MacroAssemblerARMv7::add64):
(JSC::MacroAssemblerARMv7::and64):
(JSC::MacroAssemblerARMv7::mul64):
(JSC::MacroAssemblerARMv7::countLeadingZeros64):
(JSC::MacroAssemblerARMv7::countTrailingZeros64):
(JSC::MacroAssemblerARMv7::compare64):
(JSC::MacroAssemblerARMv7::sub64):
(JSC::MacroAssemblerARMv7::xor64):
* Source/JavaScriptCore/wasm/WasmBBQJIT.h:
* Source/JavaScriptCore/wasm/WasmBBQJIT32_64.cpp:
(JSC::Wasm::BBQJITImpl::BBQJIT::addI64Mul):
(JSC::Wasm::BBQJITImpl::BBQJIT::addI64And):
(JSC::Wasm::BBQJITImpl::BBQJIT::addI64Xor):
(JSC::Wasm::BBQJITImpl::BBQJIT::addI64Clz):
(JSC::Wasm::BBQJITImpl::BBQJIT::addI64Ctz):
(JSC::Wasm::BBQJITImpl::BBQJIT::emitCompareI64):
(JSC::Wasm::BBQJITImpl::BBQJIT::compareI64Helper): Deleted.
Canonical link: https://commits.webkit.org/302910@main
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