[PATCH 01/17] riscv: add vectorized strlen

[Kito Cheng]

Hi Pincheng:

Could you use ENTRY/END macro to simplify the whole patch set?

https://sourceware.org/git/?p=newlib-cygwin.git;a=commit;h=a78440e35fddcf329740b5b290e503a34221fcaf

> +.option push
> +.option arch, +v

^^^ Drop this since we already guarded with __riscv_vector

> +.option pop

^^^ Drop this as well