Set limb width to 64 for loongarch64

[heiher]

No description provided.

[heiher]

Benchmarks

On LoongArch LA664

• limb_width_32:

test tests::bench_bit_length ... bench: 461 ns/iter (+/- 0) test tests::bench_compare ... bench: 406 ns/iter (+/- 5) test tests::bench_hi64 ... bench: 934 ns/iter (+/- 3) test tests::bench_iadd_small ... bench: 368 ns/iter (+/- 1) test tests::bench_imul_small ... bench: 528 ns/iter (+/- 2) test tests::bench_ishl ... bench: 777 ns/iter (+/- 1) 

• limb_width_64:

test tests::bench_bit_length ... bench: 431 ns/iter (+/- 0) test tests::bench_compare ... bench: 209 ns/iter (+/- 0) test tests::bench_hi64 ... bench: 862 ns/iter (+/- 1) test tests::bench_iadd_small ... bench: 364 ns/iter (+/- 0) test tests::bench_imul_small ... bench: 357 ns/iter (+/- 0) test tests::bench_ishl ... bench: 456 ns/iter (+/- 1) 

• bench-math.rs

#![feature(test)] #[cfg(test)] mod lexical; use lexical::math::{Limb, Math}; #[derive(Clone, Default)] struct Bigint { data: Vec<Limb>, } impl Math for Bigint { fn data(&self) -> &Vec<Limb> { &self.data } fn data_mut(&mut self) -> &mut Vec<Limb> { &mut self.data } } #[cfg(test)] mod tests { extern crate test; use super::*; use std::cmp; use test::Bencher; #[bench] fn bench_compare(b: &mut Bencher) { b.iter(|| { let mut x = Bigint::from_u64(0x3333333333333333); let mut y = Bigint::from_u64(0x3333333333333334); for i in 1..=100 { assert_eq!(x.compare(&x), cmp::Ordering::Equal); assert_eq!(x.compare(&y), cmp::Ordering::Less); assert_eq!(y.compare(&x), cmp::Ordering::Greater); } }); } #[bench] fn bench_hi64(b: &mut Bencher) { b.iter(|| { for i in 1..=10 { assert_eq!(Bigint::from_u64(0xA).hi64(), (0xA000000000000000, false)); assert_eq!(Bigint::from_u64(0xAB).hi64(), (0xAB00000000000000, false)); assert_eq!( Bigint::from_u64(0xAB00000000).hi64(), (0xAB00000000000000, false) ); assert_eq!( Bigint::from_u64(0xA23456789A).hi64(), (0xA23456789A000000, false) ); } }); } #[bench] fn bench_bit_length(b: &mut Bencher) { b.iter(|| { let x = Bigint::from_u64(0); for i in 1..=200 { assert_eq!(x.bit_length(), 0); } }); } #[bench] fn bench_iadd_small(b: &mut Bencher) { b.iter(|| { let mut x = Bigint::from_u64(0x3333333333333333); let mut y = Bigint::from_u64(0x3333333333333334); for i in 1..=100 { x.iadd_small(5); y.iadd_small(7); } }); } #[bench] fn bench_imul_small(b: &mut Bencher) { b.iter(|| { let mut x = Bigint::from_u64(0x3333333333333333); let mut y = Bigint::from_u64(0x3333333333333334); for i in 1..=50 { x.imul_small(5); y.imul_small(7); } }); } #[bench] fn bench_ishl(b: &mut Bencher) { b.iter(|| { let mut x = Bigint::from_u64(0x3333333333333333); let mut y = Bigint::from_u64(0x3333333333333334); for i in 1..=50 { x.ishl(5); y.ishl(7); } }); } }

[dtolnay]

Thank you!

[dtolnay]

Published in serde_json 1.0.111.