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| author | Mohamed Emad <hulxxv@gmail.com> | 2025-07-26 14:02:18 +0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-07-26 14:02:18 +0300 |
| commit | eed9b4e05810381d8655f40fe298abb2f90a95cf (patch) | |
| tree | 08ea3755e229a034225ebf3058b4dbcdb99df71e /clang/lib/AST/ScanfFormatString.cpp | |
| parent | 5d26e3c227f4b4a1761a8b0001b3165198def479 (diff) | |
| download | llvm-eed9b4e05810381d8655f40fe298abb2f90a95cf.zip llvm-eed9b4e05810381d8655f40fe298abb2f90a95cf.tar.gz llvm-eed9b4e05810381d8655f40fe298abb2f90a95cf.tar.bz2 | |
[libc][math][c23] Implement C23 math function asinpif16 (#146226)
The function is implemented using the following Taylor series that's
generated using [python-sympy](https://www.sympy.org/en/index.html), and
it is very accurate for |x| $$\in [0, 0.5]$$ and has been verified using
Geogebra. The range reduction is used for the rest range (0.5, 1].
$$
\frac{\arcsin(x)}{\pi} \approx
\begin{aligned}[t]
& 0.318309886183791x \\
& + 0.0530516476972984x^3 \\
& + 0.0238732414637843x^5 \\
& + 0.0142102627760621x^7 \\
& + 0.00967087327815336x^9 \\
& + 0.00712127941391293x^{11} \\
& + 0.00552355646848375x^{13} \\
& + 0.00444514782463692x^{15} \\
& + 0.00367705242846804x^{17} \\
& + 0.00310721681820837x^{19} + O(x^{21})
\end{aligned}
$$
## Geogebra graph
Closes #132210
Diffstat (limited to 'clang/lib/AST/ScanfFormatString.cpp')
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