fixed_wide_vectors/fixed_wide/src/tests.rs

use fixed_wide_traits::wide::WideMul;
use crate::types::I32F32;

#[test]
fn test_wide_mul(){
	let a=I32F32::ONE;
	let aa=a.wide_mul(a);
	assert_eq!(aa,crate::types::I64F64::ONE);
}

#[test]
fn test_bint(){
	let a=I32F32::ONE;
	assert_eq!(a*2,I32F32::from(2));
}

#[test]
fn test_sqrt(){
	let a=I32F32::ONE*4;
	assert_eq!(a.sqrt(),I32F32::from(2));
}
#[test]
fn test_sqrt_low(){
	let a=I32F32::HALF;
	let b=a*a;
	assert_eq!(b.sqrt(),a);
}
fn find_equiv_sqrt_via_f64(n:I32F32)->I32F32{
	//GIMME THEM BITS BOY
	let &[bits]=n.to_bits().to_bits().digits();
	let ibits=bits as i64;
	let f=(ibits as f64)/((1u64<<32) as f64);
	let f_ans=f.sqrt();
	let mut i=(f_ans*((1u64<<32) as f64)) as i64;
	let s=(i as i128)*(i as i128);
	if s<((ibits as i128)<<32){
		i+=1;
	}
	I32F32::from_bits(bnum::BInt::<1>::from(i))
}
#[test]
fn test_sqrt_exact(){
	let a=I32F32::ONE*2;
	let b=find_equiv_sqrt_via_f64(a);
	assert_eq!(a.sqrt(),b);
}