[torchlib] Implement signbit

[justinchuby]

No description provided.

[Copilot]

Pull request overview

This PR implements the signbit operation for the torch library, which tests each element of the input tensor to determine if the sign bit is set (i.e., if the value is negative). The implementation also updates the sign operation to properly handle boolean input tensors.

Key Changes

• Implements aten_signbit function to check if elements have their sign bit set
• Updates aten_sign to handle boolean dtype inputs by returning an identity operation
• Adds test registration for the signbit operation

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
onnxscript/function_libs/torch_lib/ops/core.py	Implements aten_signbit function and updates aten_sign to handle bool dtype
tests/function_libs/torch_lib/ops_test_data.py	Registers signbit operation for testing

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.10%. Comparing base (a571309) to head (1d55efd).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2754      +/-   ##
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+ Coverage   70.09%   70.10%   +0.01%     
==========================================
  Files         228      228              
  Lines       27382    27387       +5     
  Branches     2783     2785       +2     
==========================================
+ Hits        19194    19201       +7     
+ Misses       7229     7227       -2     
  Partials      959      959              

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