Add the xxlvw extension usage notes for the vdsmacini instruction.

[dongyasun]

为xxlvw 扩展 vdsmacini 指令补充使用说明，强调目前需要加上 volatile 关键字才能保证程序绝对正确

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Important

Add documentation note on using volatile with vdsmacini instruction in nuclei_xxlvw.rst to prevent optimization issues.

• Documentation:
  • Update nuclei_xxlvw.rst to include a note on using volatile with vdsmacini instruction to prevent optimization issues.
  • Example in Examples section updated to use volatile with vint32m1_t tmp for vdsmacini usage.

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[ellipsis-dev]

Important

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1. source/toolchain/gnu/nuclei_xxlvw.rst:209

• Draft comment:
  Documentation update: The note now clearly states that if the intrinsic’s return value is unused, it must be declared with 'volatile' to prevent optimization at higher levels (-O2+).
• Reason this comment was not posted:
  Confidence changes required: 0% <= threshold 50% None

2. source/toolchain/gnu/nuclei_xxlvw.rst:722

• Draft comment:
  Example update: Declaring the temporary return value as 'volatile' ensures the vdsmacini instruction isn't optimized away. This aligns with the documentation note.
• Reason this comment was not posted:
  Confidence changes required: 0% <= threshold 50% None

3. source/toolchain/gnu/nuclei_xxlvw.rst:209

• Draft comment:
  The term “intrinsic” is concatenated with surrounding Chinese text ("该指令的intrinsic使用时"). Consider adding spaces before and after “intrinsic” (e.g. "该指令的 intrinsic 使用时") for improved clarity.
• Reason this comment was not posted:
  Comment was on unchanged code.

4. source/toolchain/gnu/nuclei_xxlvw.rst:211

• Draft comment:
  The phrase "指令intrinsic" lacks a space between the Chinese and English words. For consistency and readability, consider updating it to "指令 intrinsic".
• Reason this comment was not posted:
  Comment was on unchanged code.

Workflow ID: wflow_vkEj7dLAmWrU1pK5

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