Wasmtime GitHub notifications bot (Apr 23 2024 at 15:53): Wasmtime GitHub notifications bot (Apr 23 2024 at 15:53):jameysharp requested wasmtime-compiler-reviewers for a review on PR #8445.
Wasmtime GitHub notifications bot (Apr 23 2024 at 15:53):jameysharp requested elliottt for a review on PR #8445.
Wasmtime GitHub notifications bot (Apr 23 2024 at 15:53):jameysharp opened PR #8445 from jameysharp:x64-32bit-imm to bytecodealliance:main:
On x86-64, instructions which take 32-bit immediate operands in 64-bit mode sign-extend those immediates.
To accommodate that, we currently only generate an immediate if the 64-bit constant we want is equal to truncating to 32 bits and then sign-extending back to 64 bits. Otherwise we put the 64-bit constant in the constant pool.
However, if the constant's type is I32, we don't care about its upper 32 bits. In that case it's safe to generate an immediate whether the sign bit is set or not. We should never need to use the constant pool for types smaller than 64 bits on x64.
Wasmtime GitHub notifications bot (Apr 23 2024 at 16:44):github-actions[bot] commented on PR #8445:
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Wasmtime GitHub notifications bot (Apr 23 2024 at 16:56):fitzgen submitted PR review:
ha, good find :p
Wasmtime GitHub notifications bot (Apr 23 2024 at 17:31):fitzgen merged PR #8445.
Last updated: Dec 23 2024 at 12:05 UTC