Add f64 exp, log, and sqrt primitives

[saulshanabrook]

• add exp, log, and sqrt as f64 primitives
• expose them through the existing f64 sort implementation
• add egg tests for the new operations, including direct failure cases for invalid domain inputs

[Copilot]

Pull request overview

Adds new floating-point math primitives (exp, log, sqrt) to the existing f64 sort so they can be used directly in egglog programs, and extends the f64 egg tests to cover both valid and invalid-domain evaluations.

Changes:

• Register exp, log, and sqrt as f64 literal primitives (with domain checks for log and sqrt).
• Extend tests/f64.egg with passing checks for the new ops and fail cases for invalid inputs.

Reviewed changes

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

File	Description
src/sort/f64.rs	Registers exp, log, sqrt primitives for the f64 sort and updates the sort’s primitive list documentation.
tests/f64.egg	Adds egg tests validating correct results and expected failures for invalid domains.

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[codspeed-hq]

Merging this PR will not alter performance

✅ 36 untouched benchmarks
⏩ 192 skipped benchmarks¹

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_{Comparing saulshanabrook:codex/f64-unary-primitives (6b6a5ea) with main (21bd8c6)}

Footnotes

1. 192 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.15%. Comparing base (114692b) to head (6b6a5ea).
⚠️ Report is 34 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #834   +/-   ##
=======================================
  Coverage   82.14%   82.15%           
=======================================
  Files          88       88           
  Lines       24867    24874    +7     
=======================================
+ Hits        20428    20434    +6     
- Misses       4439     4440    +1     

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