Stream: git-wasmtime

Topic: wasmtime / Issue #1130 Use variable-length encodings for ...

Wasmtime GitHub notifications bot (Feb 03 2021 at 18:21):

bjorn3 commented on Issue #1130:

The new backend framework emits a REX prefix only when it is necessary.

Wasmtime GitHub notifications bot (Feb 03 2021 at 19:12):

cfallin closed Issue #1130:

Variable-length encodings (introduced to support the proper machine code for loads/stores which memory operand is in a given register on x86) could allow removing the need to have both the REX vs non-REX encodings.

This would have a few benefits:

• reduce the number of encodings in the legalizer interpreter, making it faster
• allow some encodings to accept REX registers, when they couldn't before (at least regmove is affected by this issue)
• reduce the number of methods in PerCpuModeEncodings

Last updated: Dec 23 2024 at 12:05 UTC