[REVIEW ONLY v2 0/1] RISC-V (unratified): Add 'Zihintntl' extension

[Tsukasa OI <research_trasio@irq.a4lg.com>]

*** WAIT FOR SPECIFICATION FREEZE ***
This is an implementation for unratified and unfrozen RISC-V extension
and not intended to be merged as of now.
The only intent to submit this patchset is to test new instructions for
your (possibly virtual) environment and early review for fast adoption
after ratification.


[Cover Letter: Common in 'Zihintntl' and 'Zfa' patchsets]

As someone (I can't remember) pointed out in the RISC-V BoF of GNU Tools
Cauldron 2022, we don't have a policy to accept unstable extensions yet.
Still, at least we can talk about new extensions now...

1.  To try new instructions/features as fast as possible,
2.  To make actual adoption as fast as possible and
3.  To avoid redoing someone else's work

I'm working on following unratified RISC-V extensions:

1.  'Zihintntl' [resent as v2]
    <https://github.com/a4lg/binutils-gdb/wiki/riscv_zihintntl>
    <https://sourceware.org/pipermail/binutils/2022-July/121682.html>
2.  'Smrnmi' (resumable NMI)
    <https://github.com/a4lg/binutils-gdb/wiki/riscv_smrnmi>
    <https://sourceware.org/pipermail/binutils/2022-July/121689.html>
3.  'Zfa' [NEW]
    <https://github.com/a4lg/binutils-gdb/wiki/riscv_zfa>

I will resend 'Zihintntl' (squashed and applied minor formatting fixes)
and submit new 'Zfa' extension as a remainder of what am I doing.



['Zihintntl': Non-Temporal Locality Hints, Version 0.2]

This patchset adds following unratified extension to GNU Binutils:

-   Zihintntl (Non-Temporal Locality Hints extension)
    version 0.2 (may change on ratification)

... which adds only HINT instructions.

This is based on:
<https://github.com/riscv/riscv-isa-manual/commit/c0db46f72a1cc409194bf7f11c09e69a387f16a0>
(latest commit of the 'master' branch as of this writing)


Changes: v1 -> v2
-   Squashed
-   Fixed minor formatting errors
-   Added DECLARE_INSN declarations


Thanks,
Tsukasa




Tsukasa OI (1):
  UNRATIFIED RISC-V: Add 'Zihintntl' extension

 bfd/elfxx-riscv.c                             | 16 ++++++++++++
 gas/testsuite/gas/riscv/zihintntl-auto-c.d    | 17 ++++++++++++
 .../gas/riscv/zihintntl-base-noarch.d         | 25 ++++++++++++++++++
 gas/testsuite/gas/riscv/zihintntl-base.d      | 25 ++++++++++++++++++
 gas/testsuite/gas/riscv/zihintntl-base.s      | 17 ++++++++++++
 gas/testsuite/gas/riscv/zihintntl-c-noalias.d | 17 ++++++++++++
 gas/testsuite/gas/riscv/zihintntl-c.d         | 17 ++++++++++++
 gas/testsuite/gas/riscv/zihintntl-c.s         |  9 +++++++
 gas/testsuite/gas/riscv/zihintntl.d           | 17 ++++++++++++
 gas/testsuite/gas/riscv/zihintntl.s           |  9 +++++++
 include/opcode/riscv-opc.h                    | 26 +++++++++++++++++++
 include/opcode/riscv.h                        |  2 ++
 opcodes/riscv-opc.c                           | 12 +++++++++
 13 files changed, 209 insertions(+)
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-auto-c.d
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-base-noarch.d
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-base.d
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-base.s
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-c-noalias.d
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-c.d
 create mode 100644 gas/testsuite/gas/riscv/zihintntl-c.s
 create mode 100644 gas/testsuite/gas/riscv/zihintntl.d
 create mode 100644 gas/testsuite/gas/riscv/zihintntl.s


base-commit: 4e38ed582cb9a2e09141126c2e0a527816e702e6
-- 
2.34.1