[PATCH 33/46] s390: Make D(B) operand optional in .insn pseudo-mnemonic s
Project / Subsystem
binutils / s390
Date
2026-10-05
Proposer
Jens Remus <jremus@linux.ibm.com>
Source type
public_inbox
Consensus
Proposed
Sentiment
—/10
Technical tradeoffs
- • Better alignment between assembler syntax and hardware instruction format.
- • Improved usability for specific s390 instructions.
All attributes
- project
- binutils
- subsystem
- s390
- patch_id
- —
- discussion_id
- 20261005153947.363053-81-jremus@linux.ibm.com
- source_type
- public_inbox
- title
- [PATCH 33/46] s390: Make D(B) operand optional in .insn pseudo-mnemonic s
- headline
- s390: Make D(B) operand optional in .insn pseudo-mnemonic s
- tldr
- Makes the D(B) operand optional for the s390 .insn pseudo-mnemonic 's', aligning it with the instruction format.
- proposer
- Jens Remus <jremus@linux.ibm.com>
- consensus
- Proposed
- outcome
- proposed
- sentiment_score
- —
- technical_tradeoffs
-
- • Better alignment between assembler syntax and hardware instruction format.
- • Improved usability for specific s390 instructions.
- series_id
- binutils:s390: make d(b) operand optional in .insn pseudo-mnemonic s
- series_role
- reply
- series_parts
- []
- tags
-
- • binutils
- • gas
- • s390
- • assembler
- • instruction format
- bugzilla_url
- —
- date
- 2026-10-05T00:00:00.000Z
[PATCH 33/46] s390: Make D(B) operand optional in .insn pseudo-mnemonic s
This patch makes the D(B) composite operand optional in the s390 assembler’s .insn pseudo-mnemonic for the ‘s’ instruction. This change aligns the assembler’s behavior with the S instruction format, which specifies optional B and D fields. The commit also adds comments to existing tests for ESA/390 and includes new tests for z/Architecture s instructions.