[PATCH] RISC-V: Support Zalasr extension.

[Jeffrey Law]

On 1/21/2026 9:23 AM, Jiawei wrote:
> This patch supports Zalasr extension(load-acquire/store-release) instructions.
>
> https://github.com/riscv/riscv-zalasr
>
> bfd/ChangeLog:
>
>          * elfxx-riscv.c (riscv_multi_subset_supports): New ext.
>          (riscv_multi_subset_supports_ext): Ditto.
>
> gas/ChangeLog:
>
>          * NEWS: Support Zalasr extension.
>          * testsuite/gas/riscv/march-help.l: New ext.
>          * testsuite/gas/riscv/zalasr.d: New test.
>          * testsuite/gas/riscv/zalasr.s: New test.
>
> include/ChangeLog:
>
>          * opcode/riscv-opc.h (MATCH_LBA): New match opcode.
>          (MASK_LBA): New mask opcode.
>          (MATCH_LHA): New match opcode.
>          (MASK_LHA): New mask opcode.
>          (MATCH_LWA): New match opcode.
>          (MASK_LWA): New mask opcode.
>          (MATCH_LDA): New match opcode.
>          (MASK_LDA): New mask opcode.
>          (MATCH_SBR): New match opcode.
>          (MASK_SBR): New mask opcode.
>          (MATCH_SHR): New match opcode.
>          (MASK_SHR): New mask opcode.
>          (MATCH_SWR): New match opcode.
>          (MASK_SWR): New mask opcode.
>          (MATCH_SDR): New match opcode.
>          (MASK_SDR): New mask opcode.
>          (DECLARE_INSN): New insn declare.
>          * opcode/riscv.h (enum riscv_insn_class): New ext.
>
> opcodes/ChangeLog:
>
>          * riscv-opc.c: New instructions def.
It doesn't look like this ever got pushed to the trunk.  I've taken care 
of that.

Jeff