llvm/llvm-project

[libc][math] Add missing isnan variants for float16, bfloat16, and float128

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Aperta il 2 mag 2026

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 (16 commenti) (0 reazioni) (3 assegnatari)C++ (26.378 star) (10.782 fork)batch import
good first issuelibc

Descrizione

The current implementations of isnan are limited to float, double, and long double. We should add support for the remaining types (float16, bfloat16, and float128).

Additionally, the existing implementations currently rely on __builtin_isnan. I think refactoring them to use fputil would be better, especially since issignaling already uses fputil.

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