sleef-trig

Rust port of a few SLEEF trigonometric functions:

• Sleef_sind1_u35purec (approximately 15-30% slower than original)
• Sleef_sind2_u35sse2 (approximately 15-20% slower than original)
• Sleef_sind4_u35avx (approximately 5-10% slower than original)

The performance differences are the largest for inputs with high absolute values, notably equal to or greater than 1e14.

Additionally, a couple of functions only valid for inputs between -125.0 and 125.0 are provided:

• Sleef_sinf1_u35purec_range125
• Sleef_cosf1_u35purec_range125

Both are around 30x faster than the equivalent (unlimited range) sleef functions.

Usage

To use this crate, add sleef-trig as a dependency to your Cargo.toml file.

For optimal performance, compile sleef-trig with codegen-units = 1 by adding the following to Cargo.toml (once for each performance sensitive profile):

toml [profile.release.package.sleef-trig] codegen-units = 1

Running tests and benchmarks

Run:

sh cargo test cargo bench

Running tests and benchmarks requires nightly Rust and relies on sleef-trig-sys for SLEEF bindings.

Why not just link to SLEEF?

SIMD FFI is unstable and relies on undefined behaviour.