42fce292ab
Additionally, make use of this version to implement `floor` and
`floorf`.
Similar to `ceil`, musl'f `ceilf` routine seems to work better for all
float widths than the `ceil` algorithm. Trying with the `ceil` (`f64`)
algorithm produced the following regressions:
icount::icount_bench_floor_group::icount_bench_floor logspace:setup_floor()
Performance has regressed: Instructions (14064 > 13171) regressed by +6.78005% (>+5.00000)
Baselines: softfloat|softfloat
Instructions: 14064|13171 (+6.78005%) [+1.06780x]
L1 Hits: 16821|15802 (+6.44855%) [+1.06449x]
L2 Hits: 0|0 (No change)
RAM Hits: 8|9 (-11.1111%) [-1.12500x]
Total read+write: 16829|15811 (+6.43856%) [+1.06439x]
Estimated Cycles: 17101|16117 (+6.10535%) [+1.06105x]
icount::icount_bench_floorf128_group::icount_bench_floorf128 logspace:setup_floorf128()
Baselines: softfloat|softfloat
Instructions: 166868|N/A (*********)
L1 Hits: 221429|N/A (*********)
L2 Hits: 1|N/A (*********)
RAM Hits: 34|N/A (*********)
Total read+write: 221464|N/A (*********)
Estimated Cycles: 222624|N/A (*********)
icount::icount_bench_floorf16_group::icount_bench_floorf16 logspace:setup_floorf16()
Baselines: softfloat|softfloat
Instructions: 143029|N/A (*********)
L1 Hits: 176517|N/A (*********)
L2 Hits: 1|N/A (*********)
RAM Hits: 13|N/A (*********)
Total read+write: 176531|N/A (*********)
Estimated Cycles: 176977|N/A (*********)
icount::icount_bench_floorf_group::icount_bench_floorf logspace:setup_floorf()
Performance has regressed: Instructions (14732 > 10441) regressed by +41.0976% (>+5.00000)
Baselines: softfloat|softfloat
Instructions: 14732|10441 (+41.0976%) [+1.41098x]
L1 Hits: 17616|13027 (+35.2268%) [+1.35227x]
L2 Hits: 0|0 (No change)
RAM Hits: 8|6 (+33.3333%) [+1.33333x]
Total read+write: 17624|13033 (+35.2260%) [+1.35226x]
Estimated Cycles: 17896|13237 (+35.1968%) [+1.35197x]
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
Minimum Rust version policy
This crate supports rustc 1.63 and newer.
License
Usage is licensed under the MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT).
Contribution
Contributions are licensed under both the MIT license and the Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0). 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 mentioned, without any additional terms or conditions.
See LICENSE.txt for full details.