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GH-37027: [C++] Add float16 kernels to if-else and vector-replace functions #46446

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GH-37027: [C++] Add float16 kernels to if-else and vector-replace functions #46446

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@colin-r-schultz colin-r-schultz commented May 14, 2025 •
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Rationale for this change

Support float16/halffloat type in some functions which are agnostic to the numeric value.

What changes are included in this PR?

  • Added a case to GenerateTypeAgnosticPrimitive for HALF_FLOAT
  • Added float16 kernels for if_else, case_when, coalesce, and choose
  • Added float16 kernels for replace_with_mask, fill_null_forward, fill_null_backward
  • Add HalfFloatType to the list of types tested for the above functions

Are these changes tested?

Yes

Are there any user-facing changes?

Functions listed above now support float16

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⚠️ GitHub issue #37027 has been automatically assigned in GitHub to PR creator.

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