461e5b49d0
Reduction Input:
ChangeInt32ToFloat64=> TruncateFloat64ToInt32
Float64Mul=>
ChangeInt32ToFloat64=> Float64Div=>TruncateFloat64ToInt32
Output:
=> TruncateInt64ToInt32
Int64Mul
=> Int64Shr => TruncateInt64ToInt32
Test code:
function mul(a, b) {
var l = a & 0x3ffffff;
var h = b & 0x3ffffff;
var m = l * h;
var rl = m & 0x3ffffff;
var rh = (m / 0x4000000) | 0;
return rl | rh;
}
mul(1, 2);
var a0 = mul(0x3ffffff, 0x3ffffff);
mul(0x0, 0x0);
%OptimizeFunctionOnNextCall(mul);
var a1 = mul(0x3ffffff, 0x3ffffff);
print(a0 + ' == ' + a1);
BUG=
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1350223006
Cr-Commit-Position: refs/heads/master@{#31899}
|
||
|---|---|---|
| benchmarks | ||
| build | ||
| docs | ||
| include | ||
| infra | ||
| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party/binutils | ||
| tools | ||
| .clang-format | ||
| .gitignore | ||
| .ycm_extra_conf.py | ||
| AUTHORS | ||
| BUILD.gn | ||
| ChangeLog | ||
| codereview.settings | ||
| DEPS | ||
| LICENSE | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LICENSE.valgrind | ||
| Makefile | ||
| Makefile.android | ||
| Makefile.nacl | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
| snapshot_toolchain.gni | ||
| WATCHLISTS | ||
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://code.google.com/p/v8/
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 on the V8 wiki.