llvm-project.git/libc/src/math/generic/atanf.cpp, branch main

[libc][math] Refactor atanf implementation to header-only in src/__support/math folder. (#150854)

2025-07-30T04:24:49+00:00

Part of #147386

in preparation for: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450

[libc][math] add smoke tests to shared/math.h (#149741)

2025-07-21T17:48:57+00:00

Adding smoke tests for shared math header.

part of #147386

[libc][math] Refactor acosf implementation to header-only in src/__support/math folder. (#148411)

2025-07-20T19:41:28+00:00

Part of #147386

in preparation for:
https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450

[libc] Provide more fine-grained control of FMA instruction for ARM targets. (#130700)

2025-03-11T14:17:34+00:00

[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597)

2024-07-12T16:28:41+00:00

This is a part of #97655.

Revert "[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration" (#98593)

2024-07-12T07:12:13+00:00

Reverts llvm/llvm-project#98075

bots are broken

[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98075)

2024-07-11T19:35:22+00:00

This is a part of #97655.

[libc][math] Implement atan2f correctly rounded to all rounding modes. (#86716)

2024-04-01T17:31:07+00:00

We compute atan2f(y, x) in 2 stages:
- Fast step: perform computations in double precision , with relative
errors < 2^-50
- Accurate step: if the result from the Fast step fails Ziv's rounding
test, then we perform computations in double-double precision, with
relative errors < 2^-100.

On Ryzen 5900X, worst-case latency is ~ 200 clocks, compared to average
latency ~ 60 clocks, and average reciprocal throughput ~ 20 clocks.

[libc][NFC] Move `Sign` type to separate header (#85930)

2024-03-20T14:10:19+00:00

[libc] Prevent constant propagation for atanf(+-Inf) in gcc. (#85733)

2024-03-19T15:15:06+00:00

gcc bot failures with `atanf(+-Inf)`:
https://lab.llvm.org/buildbot/#/builders/250/builds/20331/steps/8/logs/stdio