Vectorize floating point floor_divide

[peterbell10]

Stack from ghstack:

• Support JIT shape analysis for div with rounding_mode argument #50438 Support JIT shape analysis for div with rounding_mode argument
• grad_fn getter for optional strings #55225 grad_fn getter for optional strings
• Sparse support for division rounding_mode argument #51989 Sparse support for division rounding_mode argument
• Update floor_divide behavior in line with NumPy 1.20 #56893 Update floor_divide behavior in line with NumPy 1.20
• Vectorize floating point floor_divide #55380 Vectorize floating point floor_divide

Differential Revision: D27993499

[facebook-github-bot]

💊 CI failures summary and remediations

As of commit 968282f (more details on the Dr. CI page):

---

💚 💚 Looks good so far! There are no failures yet. 💚 💚

---

This comment was automatically generated by Dr. CI (expand for details).

Follow this link to opt-out of these comments for your Pull Requests.

Please report bugs/suggestions to the (internal) Dr. CI Users group.

[peterbell10]

@mruberry PTAL

[mruberry]

Cool!

[mruberry]

Android builds are upset about the "unused" alias:

aten/src/ATen/native/cpu/BinaryOpsKernel.cpp:169:13: error: unused type alias 'vec_t' [-Werror,-Wunused-local-typedef]
      using vec_t = Vec256<scalar_t>;

[peterbell10]

@mruberry I removed the duplicate vec_t alias. Should be good now.

[mruberry]

@mruberry I removed the duplicate vec_t alias. Should be good now.

Looks like the issue has been addressed. Landing now.

[facebook-github-bot]

@mruberry merged this pull request in a18f3aa.