Stream: git-wasmtime

Topic: wasmtime / PR #2682 Fix some `i128` shift-related bugs in...


view this post on Zulip Wasmtime GitHub notifications bot (Feb 23 2021 at 22:27):

cfallin opened PR #2682 from shift-bugs to main:

This fixes #2672 and #2679, and also fixes an incorrect instruction
emission (test with small immediate) that we had missed earlier.

The shift-related fixes have to do with (i) shifts by 0 bits, as a
special case that must be handled; and (ii) shifts by a 128-bit amount,
which we can handle by just dropping the upper half (we only use 3--7
bits of shift amount).

This adjusts the lowerings appropriately, and also adds run-tests to
ensure that the lowerings actually execute correctly (previously we only
had compile-tests with golden lowerings; I'd like to correct this for
more ops eventually, adding run-tests beyond what the Wasm spec and
frontend covers).

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view this post on Zulip Wasmtime GitHub notifications bot (Feb 23 2021 at 22:27):

cfallin requested abrown for a review on PR #2682.

view this post on Zulip Wasmtime GitHub notifications bot (Feb 25 2021 at 17:48):

cfallin updated PR #2682 from shift-bugs to main.

view this post on Zulip Wasmtime GitHub notifications bot (Feb 25 2021 at 17:56):

bjorn3 submitted PR Review.

view this post on Zulip Wasmtime GitHub notifications bot (Feb 26 2021 at 22:37):

abrown submitted PR Review.

view this post on Zulip Wasmtime GitHub notifications bot (Feb 26 2021 at 23:13):

cfallin merged PR #2682.


Last updated: Nov 22 2024 at 17:03 UTC