[PATCH v6 1/2] RISC-V: Add SpacemiT vendor extension xsmtvdot

[Jeffrey Law]

On 5/25/2026 2:20 AM, Mark Zhuang wrote:
> From: Mark Zhuang <mark.zhuang@spacemit.com>
>
> SpacemiT defines Intrinsic Matrix Extension (IME) specification [1].
> SpacemiT X60 implements version 1.0 of the SpacemiT Vector Dot Product
> Extension (XsmtVdot v1.0) [2], a subset of the full IME specification.
>
> [1] https://github.com/spacemit-com/riscv-ime-extension-spec/releases/download/v1.0/spacemit-ime-asciidoc.pdf
> [2] https://github.com/spacemit-com/docs-ai/blob/main/en/architecture/ime_extension.md
> ---
>   bfd/elfxx-riscv.c                         |  7 ++
>   gas/NEWS                                  |  3 +
>   gas/config/tc-riscv.c                     | 81 +++++++++++++++++++++++
>   gas/doc/c-riscv.texi                      |  8 +++
>   gas/testsuite/gas/riscv/march-help.l      |  1 +
>   gas/testsuite/gas/riscv/x-smt-vdot-fail.d |  3 +
>   gas/testsuite/gas/riscv/x-smt-vdot-fail.l | 73 ++++++++++++++++++++
>   gas/testsuite/gas/riscv/x-smt-vdot-fail.s | 50 ++++++++++++++
>   gas/testsuite/gas/riscv/x-smt-vdot.d      | 41 ++++++++++++
>   gas/testsuite/gas/riscv/x-smt-vdot.s      | 33 +++++++++
>   include/opcode/riscv-opc.h                | 38 +++++++++++
>   include/opcode/riscv.h                    |  9 +++
>   opcodes/riscv-dis.c                       | 33 +++++++++
>   opcodes/riscv-opc.c                       | 23 +++++++
>   14 files changed, 403 insertions(+)
>   create mode 100644 gas/testsuite/gas/riscv/x-smt-vdot-fail.d
>   create mode 100644 gas/testsuite/gas/riscv/x-smt-vdot-fail.l
>   create mode 100644 gas/testsuite/gas/riscv/x-smt-vdot-fail.s
>   create mode 100644 gas/testsuite/gas/riscv/x-smt-vdot.d
>   create mode 100644 gas/testsuite/gas/riscv/x-smt-vdot.s
THanks.  I've pushed this to the trunk.

jeff