rust-lang/libm

A port of MUSL's libm to Rust.

libm

A port of MUSL's libm to Rust.

Goals

The short term goal of this library is to enable math support (e.g. sin, atan2) for the wasm32-unknown-unknown target (cf. rust-lang/compiler-builtins). The longer term goal is to enable math support in the core crate.

Already usable

This crate is on crates.io and can be used today in stable #![no_std] programs.

The API documentation can be found here.

Benchmark

The benchmarks are located in crates/libm-bench and require a nightly Rust toolchain. To run all benchmarks:

cargo +nightly bench --all

Contributing

Please check CONTRIBUTING.md

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

libm's Issues

Make this work with overflow checks

Some math functions currently panic when compiled with overflow checks enabled (which is the default for dev builds). To fix this problem the Wrapping newtype and/or wrapping ops needs to be used in some parts of the implementations.

To test that this works with overflow checks enabled uncomment this line in ci/script.sh.

implement exp

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/exp.c

implement log

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log.c

implement fdimf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/fdimf.c

implement acosf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/acosf.c

implement atan2

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/atan2.c

implement expf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/expf.c

implement atan

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/atan.c

implement hypotf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/hypotf.c

implement floor

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/floor.c

implement tanhf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/tanhf.c

implement fmod

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/fmod.c

implement fdim

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/fdim.c

implement cosf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/cosf.c

implement acos

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/acos.c

implement log1p

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log1p.c

implement log10

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log10.c

implement ceil

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/ceil.c

implement sin

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/sin.c

implement round

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/round.c

implement cos

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/cos.c

implement cosh

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/cosh.c

implement cbrt

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/cbrt.c

implement hypot

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/hypot.c

implement pow

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/pow.c

implement asin

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/asin.c

implement sinh

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/sinh.c

implement exp2f

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/exp2f.c

implement cbrtf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/cbrtf.c

implement exp2

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/exp2.c

implement logf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/logf.c

implement atanf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/atanf.c

implement fmaf

https://git.musl-libc.org/cgit/musl/tree/src/math/fmaf.c

implement log10f

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log10f.c

implement expm1f

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/expm1f.c

implement asinf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/asinf.c

implement sinhf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/sinhf.c

implement ceilf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/ceilf.c

implement sinf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/sinf.c

implement tan

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/tan.c

implement roundf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/roundf.c

implement tanh

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/tanh.c

implement tanf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/tanf.c

implement log1pf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log1pf.c

implement log2f

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log2f.c

implement atan2f

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/atan2f.c

implement expm1

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/expm1.c

implement fma

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/fma.c

implement log2

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/log2.c

implement coshf

Source: https://git.musl-libc.org/cgit/musl/tree/src/math/coshf.c