Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: c55d0673236c1b2367cc0f820298c06d4967346d
https://github.com/WebKit/WebKit/commit/c55d0673236c1b2367cc0f820298c06d4967346d
Author: Keith Miller <keith_mil...@apple.com>
Date: 2023-08-21 (Mon, 21 Aug 2023)
Changed paths:
A JSTests/stress/uint8clamped-rounding-mode.js
M Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
M Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
Log Message:
-----------
Could round rather than truncate in compileClampDoubleToByte?
https://bugs.webkit.org/show_bug.cgi?id=72054
rdar://113734964
Reviewed by Yusuke Suzuki.
Right now there's a difference between our non-optimizing code and our C++ code
for ClampedUint8Arrays.
In the C++ code we correctly do a round to nearest (ties to even) but in the
optimizing JITs we do a round to inifinity.
This patch fixes our optimizing code to round to nearest too.
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::clampDoubleToByte):
(JSC::DFG::compileClampDoubleToByte):
* Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:
(JSC::FTL::DFG::LowerDFGToB3::compileCompareStrictEq):
Canonical link: https://commits.webkit.org/267100@main
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