Stream: git-wasmtime

Topic: wasmtime / PR #14285 cranelift: fix missing ISLE lowering...

view this post on Zulip Wasmtime GitHub notifications bot (Sep 05 2026 at 05:48):

dsecurity49 opened PR #14285 from dsecurity49:fix-aarch64-vhigh-bits-float-vectors to bytecodealliance:main:

Resolves missing ISLE rules from #12197 on AArch64, x86_64, and RISC-V.

  1. AArch64:

    • vhigh_bits: Switched vhigh_bits rules from $I* to multi_lane to support float vector types (f32x4, f64x2, f16x8), matching x64 and s390x.
    • band + bnot: Added lowering rules for band(bnot) on scalar floats (f32, f64) to emit a single bic instruction instead of separate mvn + and.

  2. x86_64:

    • bitcast_gpr_to_xmm: Added 8-bit byte rule to fix compiler panic in scalar_to_vector.i8x16 / vany_true.i8x16 (using PINSRB on SSE4.1, and MOVZBL + PINSRW on baseline SSE2).

  3. RISC-V:

    • select_spectre_guard: Added lowering rule for vector types (ty_supported_vec) using vand.vx, vandn.vx, and vor.vv.

Includes precise-output filetests for all three architectures and enables aarch64 in runtests/simd-vhighbits-float.clif.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 05 2026 at 05:48):

dsecurity49 requested cfallin for a review on PR #14285.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 05 2026 at 05:48):

dsecurity49 requested wasmtime-compiler-reviewers for a review on PR #14285.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 05 2026 at 07:44):

github-actions[bot] added the label cranelift on PR #14285.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 05 2026 at 07:44):

github-actions[bot] added the label cranelift:area:aarch64 on PR #14285.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 05 2026 at 07:44):

github-actions[bot] added the label cranelift:area:x64 on PR #14285.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 08 2026 at 17:39):

:thumbs_up: cfallin submitted PR review:

Thanks!

view this post on Zulip Wasmtime GitHub notifications bot (Sep 08 2026 at 17:39):

cfallin added PR #14285 cranelift: fix missing ISLE lowering rules from #12197 on AArch64, x86_64, and RISC-V to the merge queue.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 08 2026 at 18:06):

:check: cfallin merged PR #14285.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 08 2026 at 18:06):

cfallin removed PR #14285 cranelift: fix missing ISLE lowering rules from #12197 on AArch64, x86_64, and RISC-V from the merge queue.

Last updated: Sep 20 2026 at 18:08 UTC