Fix memory initialization when offset is negative#7559
Merged
alexcrichton merged 1 commit intobytecodealliance:mainfrom Nov 20, 2023
Merged
Fix memory initialization when offset is negative#7559alexcrichton merged 1 commit intobytecodealliance:mainfrom
alexcrichton merged 1 commit intobytecodealliance:mainfrom
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This commit fixes a bug in initializing memory segments of 32-bit memories where if the offset was negative when viewed as a signed integer the offset was incorrectly sign-extended to a 64-bit value instead of zero-extended. This commit replaces an `i32`-to-`u64` cast with an `i32`-to-`u32` cast followed by a `u32`-to-`u64` cast which performs the zero extend. Closes bytecodealliance#7558
abrown
approved these changes
Nov 20, 2023
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This commit fixes a bug in initializing memory segments of 32-bit memories where if the offset was negative when viewed as a signed integer the offset was incorrectly sign-extended to a 64-bit value instead of zero-extended. This commit replaces an
i32-to-u64cast with ani32-to-u32cast followed by au32-to-u64cast which performs the zero extend.Closes #7558