1831176 - Implement the newer GC cast encodings

Status: RESOLVED FIXED

(Core :: JavaScript: WebAssembly, task, P2)

Description

[Ben Visness [:bvisness]]

The encoding for br_on_cast has changed again to separate br_on_cast and br_on_cast_fail instead of relying on a flag bit. See https://github.com/WebAssembly/gc/pull/359#issuecomment-1531774122.

Comment 2

[Ben Visness [:bvisness]]

Attachment: Bug 1831176: Implement new GC cast encodings. r=yury

The wasm GC br_on_cast and br_on_cast_fail instructions used to
share the same opcode and were disambiguated by a flag. They now
use two different opcodes.

Comment 3

[Ben Visness [:bvisness]]

Attachment: Bug 1831176: Update wast crate. r=yury

Updating wast to the latest version in order to get the new binary encoding for cast instructions.

Depends on D184021

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/59aa4c2eb8b3
Implement new GC cast encodings. r=yury
https://hg.mozilla.org/integration/autoland/rev/50de53b66856
Update wast crate. r=yury,glandium,supply-chain-reviewers

Comment 5

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/59aa4c2eb8b3
https://hg.mozilla.org/mozilla-central/rev/50de53b66856