1685984 - Refactoring: Make SIMD code cross-platform

Status: RESOLVED FIXED

(Core :: JavaScript: WebAssembly, enhancement, P3)

Description

[Lars T Hansen [:lth]]

Now that the SIMD code has stabilized, and in anticipation of doing more with SIMD on on non-x86 platforms, it can be moved out of the x86-specific part of the source tree and made to conform to the normal style: the LIR nodes are shared, the analysis code is shared, and every platform that does not implement SIMD gets stubs for LIR/codegen.

Comment 1

[Lars T Hansen [:lth]]

Attachment: Bug 1685984 - Refactor SIMD code to make it more cross-platform. r?jseward

Move shareable SIMD code -- LIR nodes and analysis code -- out of
jit/x86-shared into jit/shared. Make some notes in the moved analysis
code about it being slightly x86-centric. Truly though, most of the
patterns carry over to other architectures, and we can add other
patterns for new architectures. For example, ARM64 has a reverse
instruction.

Create NYI stubs for SIMD in jit/arm64, jit/arm, and jit/mips-shared,
and remove the stubs from jit/shared.

SIMD is not enabled on any additional platforms yet, so all tests
continue to pass with this patch.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/5823156c7dc4
Refactor SIMD code to make it more cross-platform.  r=jseward

Comment 3

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://hg.mozilla.org/mozilla-central/rev/5823156c7dc4