fix(asm): read the arm64 move-wide immediate as an unsigned pattern

Assisted-by: GLM 5.3 Flash
2026-09-23 21:03:03 +02:00
parent 7b11c62f53
commit 74d6b90d69
3 changed files with 54 additions and 14 deletions
@@ -33,6 +33,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  resolved to nothing: only the forward forms counted.  A negative count
  now walks the same instruction statements backwards, labels excluded,
  byte-identical with the toolchain.
+- **The arm64 move-wide family reads its immediate as an unsigned
+  pattern.**  `MOVK $(40000<<48)` folds to a negative int64 and was
+  rejected; the toolchain picks the 16-bit lane from the 64-bit bit
+  pattern, so the encoder now does the same, and a zero immediate is
+  rejected where the toolchain rejects it.

 ## [0.35.0] - 2026-09-22