s390: Document PC-relative immediate operands in instruction formats
Updates s390 instruction format documentation to use 'RIx' for PC-relative immediate operands in RIE, RIL, and RSI formats.
This patch enhances the GNU Assembler’s documentation for the s390 architecture by introducing the ‘RIx’ (Relative Immediate) notation for PC-relative immediate operands. This change applies to instruction formats like RIE, RIL, and RSI, ensuring clearer and more accurate documentation that aligns with the z/Architecture Principles of Operation.
- proposer
Introduces 'RIx' notation for PC-relative immediate operands in the documentation for RIE, RIL, and RSI instruction formats.
In Details
This patch updates the s390 assembler's documentation (gas/doc/c-s390.texi) to standardize the representation of PC-relative immediate operands. It introduces the RIx notation (e.g., RI2) to denote signed PC-relative immediates used in instruction formats like RIE, RIL, and RSI, improving clarity and consistency with the z/Architecture specification.
- PC-relative immediate
- An immediate value in an instruction that is calculated relative to the current value of the Program Counter (PC).
- RIE format
- A s390 instruction format that includes register and PC-relative immediate operands.
- RIL format
- A s390 instruction format that includes a register and a PC-relative immediate operand.
- RSI format
- A s390 instruction format that includes register and PC-relative immediate operands.