[block] Clarify scalar body entry in Tile blocks - #273
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Make the existing PTO-REQ-SCALAR-BODY-ENTRY-001 contract explicit that decoded scalar instructions may enter the body of an active Tile block without an intervening Standard BSTART. Add focused executable evidence that body entry preserves the Tile block kind. This clarifies the accepted issue #191 / ADR-BLOCK-0012 behavior and changes no encoding or state transition.
This was referenced Sep 12, 2026
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Summary
PTO-REQ-SCALAR-BODY-ENTRY-001that the first decoded scalar instruction may enter the body of any active block kind, explicitly including Tile blocks.C.BSTART.STD.This closes documentation/evidence around the behavior already accepted by issue #191 and ADR-BLOCK-0012. It changes no instruction encoding, decoder, block state, or execution transition.
Validation
make pr-check: 10/10 PASSscripts/prepare-pr: 17/17 PASSgit diff --check: PASSIndependent exact-input review remains required before merge, as reported by
scripts/prepare-pr.Downstream implementation: LinxISA/llvm-project#92. LinxISA implementer guidance: LinxISA/linx-isa#201.