mulimoen
/
SummationByParts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

assign instead of add_assign in diffx/diffy

This commit is contained in:
Magnus Ulimoen 2019-11-14 08:04:32 +01:00
parent 9bba3531cd
commit e0f3ed3fd8
2 changed files with 21 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/maxwell.rs
View File

@ -79,21 +79,19 @@ impl System {
}
};
// hz = -ey_x + ex_y
let tmp = &mut k[i].0;
SBP::diffx(y.2.view(), tmp.view_mut());
SBP::diffy(y.0.view(), k[i].1.view_mut());
k[i].1.scaled_add(-1.0, tmp);
// ex = hz_y
k[i].0.fill(0.0);
SBP::diffy(y.1.view(), k[i].0.view_mut());
// ey = -hz_x
k[i].2.fill(0.0);
SBP::diffx(y.1.view(), k[i].2.view_mut());
k[i].2.mapv_inplace(|v| -v);
// hz = -ey_x + ex_y
k[i].1.fill(0.0);
SBP::diffx(y.2.view(), k[i].1.view_mut());
k[i].1.mapv_inplace(|v| -v);
SBP::diffy(y.0.view(), k[i].1.view_mut());
// Boundary conditions (SAT)
let ny = y.0.shape()[0];
let nx = y.0.shape()[1];

33
src/operators/upwind4.rs
View File

@ -105,10 +105,10 @@ impl Upwind4 {
),
];
unsafe {
*fut.get_unchecked_mut(0) += idx * (block[0] * first_elems).sum();
*fut.get_unchecked_mut(1) += idx * (block[1] * first_elems).sum();
*fut.get_unchecked_mut(2) += idx * (block[2] * first_elems).sum();
*fut.get_unchecked_mut(3) += idx * (block[3] * first_elems).sum()
*fut.get_unchecked_mut(0) = idx * (block[0] * first_elems).sum();
*fut.get_unchecked_mut(1) = idx * (block[1] * first_elems).sum();
*fut.get_unchecked_mut(2) = idx * (block[2] * first_elems).sum();
*fut.get_unchecked_mut(3) = idx * (block[3] * first_elems).sum()
};
let diag = f32x8::new(
@ -131,16 +131,16 @@ impl Upwind4 {
)
.take(nx - 2 * block.len())
{
*f += idx * (p * diag).sum();
*f = idx * (p * diag).sum();
}
let last_elems = unsafe { f32x8::from_slice_unaligned_unchecked(&prev[nx - 8..]) }
.shuffle1_dyn(u32x8::new(7, 6, 5, 4, 3, 2, 1, 0));
unsafe {
*fut.get_unchecked_mut(nx - 4) += -idx * (block[3] * last_elems).sum();
*fut.get_unchecked_mut(nx - 3) += -idx * (block[2] * last_elems).sum();
*fut.get_unchecked_mut(nx - 2) += -idx * (block[1] * last_elems).sum();
*fut.get_unchecked_mut(nx - 1) += -idx * (block[0] * last_elems).sum();
*fut.get_unchecked_mut(nx - 4) = -idx * (block[3] * last_elems).sum();
*fut.get_unchecked_mut(nx - 3) = -idx * (block[2] * last_elems).sum();
*fut.get_unchecked_mut(nx - 2) = -idx * (block[1] * last_elems).sum();
*fut.get_unchecked_mut(nx - 1) = -idx * (block[0] * last_elems).sum();
}
}
@ -167,8 +167,7 @@ impl Upwind4 {
];
for (i, bl) in Self::BLOCK.iter().enumerate() {
let mut b = f32x4::from_slice_unaligned(&fut[i * nx + j..]);
b += idy
let b = idy
* (a[0] * bl[0]
+ a[1] * bl[1]
+ a[2] * bl[2]
@ -191,8 +190,7 @@ impl Upwind4 {
a[6],
f32x4::from_slice_unaligned(&prev[nx * (i + 3) + j..]),
];
let mut b = f32x4::from_slice_unaligned(&fut[nx * i + j..]);
b += idy
let b = idy
* (a[0] * Self::DIAG[0]
+ a[1] * Self::DIAG[1]
+ a[2] * Self::DIAG[2]
@ -214,8 +212,7 @@ impl Upwind4 {
];
for (i, bl) in Self::BLOCK.iter().enumerate() {
let mut b = f32x4::from_slice_unaligned(&fut[(ny - 1 - i) * nx + j..]);
b += -idy
let b = -idy
* (a[0] * bl[0]
+ a[1] * bl[1]
+ a[2] * bl[2]
@ -246,7 +243,7 @@ impl Upwind4 {
let first_elems = prev.slice(s!(..7));
for (bl, f) in block.outer_iter().zip(&mut fut) {
let diff = first_elems.dot(&bl);
*f += diff * idx;
*f = diff * idx;
}
for (window, f) in prev
@ -257,13 +254,13 @@ impl Upwind4 {
.take(nx - 8)
{
let diff = diag.dot(&window);
*f += diff * idx;
*f = diff * idx;
}
let last_elems = prev.slice(s!(nx - 7..;-1));
for (bl, f) in block.outer_iter().zip(&mut fut.slice_mut(s![nx - 4..;-1])) {
let diff = -bl.dot(&last_elems);
*f += diff * idx;
*f = diff * idx;
}
}
}