40738e6c45
This makes some checks a bit stricter to avoid accepting illegal relaxed
SIMD opcodes.
1) The default case in the Liftoff compiler should be UNREACHABLE,
such that the switch case is required to cover all defined opcodes.
2) The {WasmOpcodes::IsRelaxedSimdOpcode} wrongly also returned {true}
for opcodes like 0xfd300. We should really check nibbles 3-5 for the
exact value 0xfd1.
3) {WasmOpcodes::Signature} was returning a non-null signatures for
illegal opcodes like 0xfd200, because {IsRelaxedSimdOpcode} returned
false, and then we would just use the lower bytes for the lookup in
the SIMD signature table.
R=thibaudm@chromium.org
CC=gdeepti@chromium.org
Bug: chromium:1324081
Change-Id: Idbfde570ccd782e59b47b96e7ca8cc28fa7fae98
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3687309
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80934}
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| build_overrides | ||
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| docs | ||
| gni | ||
| include | ||
| infra | ||
| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party | ||
| tools | ||
| .bazelrc | ||
| .clang-format | ||
| .clang-tidy | ||
| .editorconfig | ||
| .flake8 | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gn | ||
| .mailmap | ||
| .style.yapf | ||
| .vpython | ||
| .vpython3 | ||
| .ycm_extra_conf.py | ||
| AUTHORS | ||
| BUILD.bazel | ||
| BUILD.gn | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
| COMMON_OWNERS | ||
| DEPS | ||
| DIR_METADATA | ||
| ENG_REVIEW_OWNERS | ||
| INFRA_OWNERS | ||
| INTL_OWNERS | ||
| LICENSE | ||
| LICENSE.fdlibm | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LOONG_OWNERS | ||
| MIPS_OWNERS | ||
| OWNERS | ||
| PPC_OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
| RISCV_OWNERS | ||
| S390_OWNERS | ||
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| WORKSPACE | ||
V8 JavaScript Engine
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
V8 can run standalone, or can be embedded into any C++ application.
V8 Project page: https://v8.dev/docs
Getting the Code
Checkout depot tools, and run
fetch v8
This will checkout V8 into the directory v8 and fetch all of its dependencies.
To stay up to date, run
git pull origin
gclient sync
For fetching all branches, add the following into your remote
configuration in .git/config:
fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
fetch = +refs/tags/*:refs/tags/*
Contributing
Please follow the instructions mentioned at v8.dev/docs/contribute.