[libc-commits] [libc] [libc][math] Implement a fast pass for atan2f128 with 1ULP error using DyadicFloat<128>. (PR #133150)

[via libc-commits]

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@@ -106,7 +110,7 @@ constexpr fputil::DoubleDouble ATAN_I[65] = {
 //        + x_lo * (1 - x_hi^2 + x_hi^4)
 // Since p.lo is ~ x^3/3, the relative error from rounding is bounded by:
 //   |(atan(x) - P(x))/atan(x)| < ulp(x^2) <= 2^(-14-52) = 2^-66.
-DoubleDouble atan_eval(const DoubleDouble &x) {
+[[maybe_unused]] DoubleDouble atan_eval(const DoubleDouble &x) {
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lntue wrote:

Because `atan_eval(const DoubleDouble &)` is not used in `atan2f128`, and (right now) `atan_eval(Float128)` is not used in `atan` and `atan2`.

https://github.com/llvm/llvm-project/pull/133150