[Webkit-unassigned] [Bug 220889] JIT support for SSE4a

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220889

--- Comment #3 from Yusuke Suzuki <ysuzuki at apple.com> ---
Since precision of x87 and SSE are different, we should not mix both.

So,

1. In LLInt, let's just use slow path function calls instead in x64.
2. In Wasm Air tier, we should emit function call nodes instead of using CeilDouble etc. if supportsFloatingPointRounding() returns false.
3. In Wasm OMG tier, we do not need to do anything since B3::Ceil etc. is automatically converted into function calls if supportsFloatingPointRounding is false.

Could you upload a patch with webkit-patch? We need ChangeLog update where we need very descriptive explanation about the change.

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