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kernel/api: add nalgebra::linalg methods

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abdul124 2024-07-22 11:57:58 +08:00
parent bab938c563
commit 69d5b11ebf
1 changed files with 27 additions and 1 deletions
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28
src/libksupport/src/kernel/api.rs
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@ -1,10 +1,12 @@
use alloc::vec;
use core::{ffi::VaList, ptr, str};
use core::{ffi::VaList, ptr, str, slice};
use libc::{c_char, c_int, size_t};
use libm;
use log::{info, warn};
use nalgebra::{DMatrix, linalg};
#[cfg(has_drtio)]
use super::subkernel;
use super::{cache,
@ -38,6 +40,26 @@ unsafe extern "C" fn rtio_log(fmt: *const c_char, mut args: ...) {
rtio::write_log(buf.as_slice());
}
unsafe extern "C" fn linalg_try_invert_to(dim0: usize, dim1: usize, data: *mut f64) -> i8 {
let data_slice = unsafe { slice::from_raw_parts_mut(data, dim0 * dim1) };
let matrix = DMatrix::from_row_slice(dim0, dim1, data_slice);
let mut inverted_matrix = DMatrix::<f64>::zeros(dim0, dim1);
if linalg::try_invert_to(matrix, &mut inverted_matrix) {
data_slice.copy_from_slice(inverted_matrix.transpose().as_slice());
1
} else {
0
}
}
unsafe extern "C" fn linalg_wilkinson_shift(dim0: usize, dim1: usize, data: *mut f64) -> f64 {
let data_slice = slice::from_raw_parts_mut(data, dim0 * dim1);
let matrix = DMatrix::from_row_slice(dim0, dim1, data_slice);
linalg::wilkinson_shift(matrix[(0, 0)], matrix[(1, 1)], matrix[(0, 1)])
}
macro_rules! api {
($i:ident) => ({
extern { static $i: u8; }
@ -319,6 +341,10 @@ pub fn resolve(required: &[u8]) -> Option<u32> {
}
api!(yn = yn)
},
// linalg
api!(linalg_try_invert_to = linalg_try_invert_to),
api!(linalg_wilkinson_shift = linalg_wilkinson_shift),
];
api.iter()
.find(|&&(exported, _)| exported.as_bytes() == required)