[PATCH 0/3] RISC-V: Add 'Zmmul' extension

[Tsukasa OI]

Hello,

This patchset adds following extension to GNU Binutils:

-   Zmmul (Multiply-only 'M' extension subset)
    version 1.0 (recently ratified and version number determined)

This is based on the ISA Manual, draft-20220707-f518c25:
<https://github.com/riscv/riscv-isa-manual/releases/tag/draft-20220707-f518c25>
<https://github.com/riscv/riscv-isa-manual/commit/f518c259c008f926eba4aba67804f62531b6e94b>

This patchset also contains generic 'M' extension testcases.


[RFC: Concerns about implied extension]

Because 'Zmmul' extension is always implied by 'M', existence of 'Zmmul'
extension is reflected on RISC-V attributes section.  It means, it also
changes ELF output on RV[32|64]IM with old specification.

If this behavior is undesirable, we could:

-   Remove 'Zmmul' from implied extension list
-   Check 'M' or 'Zmmul' on INSN_CLASS_ZMMUL
    (instruction class may be renamed to INSN_CLASS_M_OR_ZMMUL)

Thanks,
Tsukasa




Tsukasa OI (3):
  RISC-V: Add 'M' extension testcases
  RISC-V: Add 'Zmmul' extension
  RISC-V: Add 'Zmmul' failure testcases

 bfd/elfxx-riscv.c                             |  6 +++++
 gas/testsuite/gas/riscv/attribute-09.d        |  2 +-
 gas/testsuite/gas/riscv/m-ext-32.d            | 18 +++++++++++++
 gas/testsuite/gas/riscv/m-ext-64.d            | 23 ++++++++++++++++
 gas/testsuite/gas/riscv/m-ext-fail-xlen-32.d  |  4 +++
 gas/testsuite/gas/riscv/m-ext-fail-xlen-32.l  |  6 +++++
 gas/testsuite/gas/riscv/m-ext-fail-zmmul-32.d |  4 +++
 gas/testsuite/gas/riscv/m-ext-fail-zmmul-32.l |  5 ++++
 gas/testsuite/gas/riscv/m-ext-fail-zmmul-64.d |  4 +++
 gas/testsuite/gas/riscv/m-ext-fail-zmmul-64.l |  9 +++++++
 gas/testsuite/gas/riscv/m-ext.s               | 21 +++++++++++++++
 gas/testsuite/gas/riscv/option-arch-02.d      |  2 +-
 gas/testsuite/gas/riscv/zmmul-32.d            | 14 ++++++++++
 gas/testsuite/gas/riscv/zmmul-64.d            | 15 +++++++++++
 gas/testsuite/gas/riscv/zmmul-fail-arch-64.d  |  4 +++
 gas/testsuite/gas/riscv/zmmul-fail-arch-64.l  | 14 ++++++++++
 include/opcode/riscv.h                        |  1 +
 opcodes/riscv-opc.c                           | 26 +++++++++----------
 18 files changed, 163 insertions(+), 15 deletions(-)
 create mode 100644 gas/testsuite/gas/riscv/m-ext-32.d
 create mode 100644 gas/testsuite/gas/riscv/m-ext-64.d
 create mode 100644 gas/testsuite/gas/riscv/m-ext-fail-xlen-32.d
 create mode 100644 gas/testsuite/gas/riscv/m-ext-fail-xlen-32.l
 create mode 100644 gas/testsuite/gas/riscv/m-ext-fail-zmmul-32.d
 create mode 100644 gas/testsuite/gas/riscv/m-ext-fail-zmmul-32.l
 create mode 100644 gas/testsuite/gas/riscv/m-ext-fail-zmmul-64.d
 create mode 100644 gas/testsuite/gas/riscv/m-ext-fail-zmmul-64.l
 create mode 100644 gas/testsuite/gas/riscv/m-ext.s
 create mode 100644 gas/testsuite/gas/riscv/zmmul-32.d
 create mode 100644 gas/testsuite/gas/riscv/zmmul-64.d
 create mode 100644 gas/testsuite/gas/riscv/zmmul-fail-arch-64.d
 create mode 100644 gas/testsuite/gas/riscv/zmmul-fail-arch-64.l


base-commit: d2acd4b0c5bab349aaa152d60268bc144634a844
-- 
2.34.1