[PATCH 22/46] s390: Add .insn pseudo-mnemonics rrf_a/b/c/d/e
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
- • Handling the unique operand order and optional operand specification for the RRF format requires careful implementation.
- • Ensuring backward compatibility with older RRF formats while supporting extensions.
All attributes
- project
- binutils
- subsystem
- s390
- patch_id
- —
- discussion_id
- 20261005153947.363053-70-jremus@linux.ibm.com
- source_type
- public_inbox
- title
- [PATCH 22/46] s390: Add .insn pseudo-mnemonics rrf_a/b/c/d/e
- headline
- s390: Add .insn pseudo-mnemonics rrf_a/b/c/d/e
- tldr
- Adds s390 assembler support for RRF instruction format variants (rrf_a/b/c/d/e) and fixes related test cases.
- proposer
- Jens Remus <jremus@linux.ibm.com>
- consensus
- Proposed
- outcome
- proposed
- sentiment_score
- —
- technical_tradeoffs
-
- • Handling the unique operand order and optional operand specification for the RRF format requires careful implementation.
- • Ensuring backward compatibility with older RRF formats while supporting extensions.
- series_id
- binutils:s390: add .insn pseudo-mnemonics rrf_a/b/c/d/e
- series_role
- reply
- series_parts
- []
- tags
-
- • s390
- • gas
- • assembler
- • instruction-formats
- • documentation
- bugzilla_url
- —
- date
- 2026-10-05T00:00:00.000Z
[PATCH 22/46] s390: Add .insn pseudo-mnemonics rrf_a/b/c/d/e
This patch introduces support for the RRF instruction format variants (rrf_a, rrf_b, rrf_c, rrf_d, rrf_e) as ‘.insn’ pseudo-mnemonics in the s390 GNU Assembler. It addresses special operand ordering and optional operands defined in the RRF format, as per the z/Architecture specification. The changes include updates to opcode definitions, documentation, and test cases for both ESA/390 and z/Architecture assemblers. Notably, RRF format predates z900 and was extended with an optional M4 mask field.