LGTM. Thanks.

rebase code.

rebase code and improve error message.

rebase code.

ping.

@xen0n Thanks for your suggestion.

rebase code and change code for @xen0n's comments.

Please rebase code for test errors.

LGTM.

ERROR   git-clang-format returned an non-zero exit code 1

Please format the code. Maybe, you can use the following command:

git diff -U0 --no-color HEAD^ | clang/tools/clang-format/clang-format-diff.py -i -p1

Rebase code.

Fix the test error.

@thakis OK, Thank you a lot.

Rebase code.

Update for AMMax and AMMin

In D138469#3943679, @xry111 wrote:

And maybe this need to be sequenced after D138481?

More readable.

Please rebase code to latest commit. the failed test should be OK.

Improve comments.

Rebase code.

As shown in the patch https://github.com/llvm/llvm-project/commit/ee3aef93b73646ef98f0241498d807a4fb68b78c, I think we can add other constraint code or operand modifier in other patches.
The reviewers who accepted the patch above concentrate on RISCV backend. Maybe, we can commit this patch directly.

Add 'J' constraint code.

rebase code and fix nits.

FYI:
https://reviews.llvm.org/D117635

rebase code

What is the kernel version that support this flags? Maybe give a link on Github?

rebase code

Change parameters type and order

Use llvm::minIntN(N) and llvm::maxIntN(N) and remove .str(). Done.

Use llvm::minIntN(N) and llvm::maxIntN(N) and remove .str()

I defined a method named "reportOutOfRangeError" to report "out of range" error. Thanks!

Update patch for review comments.

rebase code

Thanks! LGTM.

It is better to upload diffs with full context (-U99999) to make it possible to browse the whole file.