const SOLAR_MASS: f64 = 4.0 * PI * PI;
const DAYS_PER_YEAR: f64 = 365.24;
-#[derive(Debug)]
-#[repr(simd)]
+#[derive(Debug, Clone, Copy)]
pub struct Body {
- pub x: Simdf64([f64, 4]),
- pub v: Simdf64([f64, 4]),
+ pub x: f64x4,
+ pub v: f64x4,
pub mass: f64,
}
-// Translation attempt is this ^^^ far
-//
+// translation up to here
const N_BODIES: usize = 5;
#[allow(clippy::unreadable_literal)]
const BODIES: [Body; N_BODIES] = [
// sun:
Body {
- x: f64x4::new(0., 0., 0., 0.),
- v: f64x4::new(0., 0., 0., 0.),
+ x: f64x4::from_array([0., 0., 0., 0.]),
+ v: f64x4::from_array([0., 0., 0., 0.]),
mass: SOLAR_MASS,
},
// jupiter:
Body {
- x: f64x4::new(
+ x: f64x4::from_array([
4.84143144246472090e+00,
-1.16032004402742839e+00,
-1.03622044471123109e-01,
0.,
- ),
- v: f64x4::new(
+ ]),
+ v: f64x4::from_array([
1.66007664274403694e-03 * DAYS_PER_YEAR,
7.69901118419740425e-03 * DAYS_PER_YEAR,
-6.90460016972063023e-05 * DAYS_PER_YEAR,
0.,
- ),
+ ]),
mass: 9.54791938424326609e-04 * SOLAR_MASS,
},
// saturn:
Body {
- x: f64x4::new(
+ x: f64x4::from_array([
8.34336671824457987e+00,
4.12479856412430479e+00,
-4.03523417114321381e-01,
0.,
- ),
- v: f64x4::new(
+ ]),
+ v: f64x4::from_array([
-2.76742510726862411e-03 * DAYS_PER_YEAR,
4.99852801234917238e-03 * DAYS_PER_YEAR,
2.30417297573763929e-05 * DAYS_PER_YEAR,
0.,
- ),
+ ]),
mass: 2.85885980666130812e-04 * SOLAR_MASS,
},
// uranus:
Body {
- x: f64x4::new(
+ x: f64x4::from_array([
1.28943695621391310e+01,
-1.51111514016986312e+01,
-2.23307578892655734e-01,
0.,
- ),
- v: f64x4::new(
+ ]),
+ v: f64x4::from_array([
2.96460137564761618e-03 * DAYS_PER_YEAR,
2.37847173959480950e-03 * DAYS_PER_YEAR,
-2.96589568540237556e-05 * DAYS_PER_YEAR,
0.,
- ),
+ ]),
mass: 4.36624404335156298e-05 * SOLAR_MASS,
},
// neptune:
Body {
- x: f64x4::new(
+ x: f64x4::from_array([
1.53796971148509165e+01,
-2.59193146099879641e+01,
1.79258772950371181e-01,
0.,
- ),
- v: f64x4::new(
+ ]),
+ v: f64x4::from_array([
2.68067772490389322e-03 * DAYS_PER_YEAR,
1.62824170038242295e-03 * DAYS_PER_YEAR,
-9.51592254519715870e-05 * DAYS_PER_YEAR,
0.,
- ),
+ ]),
mass: 5.15138902046611451e-05 * SOLAR_MASS,
},
];
let mut e = 0.;
for i in 0..N_BODIES {
let bi = &bodies[i];
- e += bi.mass * (bi.v * bi.v).sum() * 0.5;
+ e += bi.mass * (bi.v * bi.v).horizontal_sum() * 0.5;
for bj in bodies.iter().take(N_BODIES).skip(i + 1) {
let dx = bi.x - bj.x;
- e -= bi.mass * bj.mass / (dx * dx).sum().sqrt()
+ e -= bi.mass * bj.mass / (dx * dx).horizontal_sum().sqrt()
}
}
e
let mut mag = [0.0; N];
let mut i = 0;
while i < N {
- let d2s = f64x2::new((r[i] * r[i]).sum(), (r[i + 1] * r[i + 1]).sum());
- let dmags = f64x2::splat(dt) / (d2s * d2s.sqrte());
+ let d2s = f64x2::from_array([(r[i] * r[i]).horizontal_sum(), (r[i + 1] * r[i + 1]).horizontal_sum()]);
+ let dmags = f64x2::splat(dt) / (d2s * d2s.sqrt());
dmags.write_to_slice_unaligned(&mut mag[i..]);
i += 2;
}
//.parse()
//.expect("argument should be a usize");
//run(&mut std::io::stdout(), n, alg);
- println!("{:?}", run_k<10>(10, 10));
+ println!("{:?}", run_k::<10>(10, 10));
}