[all-commits] [llvm/llvm-project] 5d2cc4: [libc][math] Improve the performance of sin/cos fo...

[lntue via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5d2cc4dc1742d7373f0c52a0a29dcc5ab97a4446
      https://github.com/llvm/llvm-project/commit/5d2cc4dc1742d7373f0c52a0a29dcc5ab97a4446
  Author: lntue <lntue at google.com>
  Date:   2026-06-08 (Mon, 08 Jun 2026)

  Changed paths:
    M libc/src/__support/math/cos.h
    M libc/src/__support/math/sin.h

  Log Message:
  -----------
  [libc][math] Improve the performance of sin/cos for small inputs |x| < 2^-4. (#201748)

- Use a degree-9 polynomial for fast path for sin(x), generated by Sollya,
with errors bounded by `|x| * 2^-68 + 2* ulp(x^3 / 6)`.
- Use a degree-8 polynomial for fast path for cos(x), generated by Sollya,
with errors bounded by `2^-69 + ulp(x^2/ 2 )`.



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