T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Support wasm select instruction with V128-typed operands on AArch64.

Browse Source 
* this requires upgrading to wasmparser 0.67.0.

* There are no CLIF side changes because the CLIF `select` instruction is
  polymorphic enough.

* on aarch64, there is unfortunately no conditional-move (csel) instruction on
  vectors.  This patch adds a synthetic instruction `VecCSel` which *does*
  behave like that.  At emit time, this is emitted as an if-then-else diamond
  (4 insns).

* aarch64 implementation is otherwise straightforwards.
This commit is contained in:
Julian Seward
2020-11-11 17:09:57 +01:00
committed by julian-seward1
parent 9ced345aed
commit 41e87a2f99
15 changed files with 122 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
cranelift/wasm/Cargo.toml
View File

@@ -12,7 +12,7 @@ keywords = ["webassembly", "wasm"]
edition = "2018"
[dependencies]
wasmparser = { version = "0.66.0", default-features = false }
wasmparser = { version = "0.67.0", default-features = false }
cranelift-codegen = { path = "../codegen", version = "0.68.0", default-features = false }
cranelift-entity = { path = "../entity", version = "0.68.0" }
cranelift-frontend = { path = "../frontend", version = "0.68.0", default-features = false }