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Crude implementation of matrices using nalgebra

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This commit is contained in:
Derek Christ
2023-12-19 15:37:32 +01:00
parent 2e44890c53
commit 8a2c675d71
7 changed files with 287 additions and 84 deletions
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122
pim-os/src/pim/array.rs
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@@ -1,25 +1,91 @@
use super::matrix::{F16x1, F16x16};
use aarch64_cpu::asm::barrier;
use core::arch::asm;
use core::panic;
use core::{arch::asm, cell::RefCell};
use half::f16;
use nalgebra::{Const, Dyn, RawStorage, RawStorageMut, SMatrix, Storage};
const NUMBER_OF_BANKS: usize = 32;
const ELEMENTS_PER_CACHE_LINE: usize = 16;
const ELEMENTS_PER_BANK_ARRAY: usize = NUMBER_OF_BANKS * ELEMENTS_PER_CACHE_LINE;
// const NUMBER_OF_BANKS: usize = 32;
const EVEN_BANK_INDEX: usize = 0;
const ODD_BANK_INDEX: usize = 8;
#[derive(Clone, Debug)]
#[repr(C, align(1024))]
pub struct BankArray(pub [f16; ELEMENTS_PER_BANK_ARRAY]);
pub struct PimMatrixArena<const R: usize, const C: usize>(pub [[F16x16; R]; C]);
impl Default for BankArray {
fn default() -> Self {
Self([f16::ZERO; ELEMENTS_PER_BANK_ARRAY])
#[derive(Debug)]
pub struct PimStorage<'a, const R: usize, const C: usize> {
pub arena: &'a RefCell<PimMatrixArena<R, C>>,
pub index: usize,
}
unsafe impl<'a, const R: usize, const C: usize> RawStorage<F16x1, Const<R>, Const<C>>
for PimStorage<'a, R, C>
{
type RStride = Dyn;
type CStride = Dyn;
fn ptr(&self) -> *const F16x1 {
unsafe {
(&self.arena.borrow().0[0][0] as *const F16x16 as *const F16x1).offset(self.index as _)
}
}
fn shape(&self) -> (Const<R>, Const<C>) {
(Const::<R>, Const::<C>)
}
fn strides(&self) -> (Self::RStride, Self::CStride) {
(Dyn(16), Dyn(16 * R))
}
fn is_contiguous(&self) -> bool {
false
}
unsafe fn as_slice_unchecked(&self) -> &[F16x1] {
panic!("PimStorage is not contiguous!");
}
}
impl BankArray {
pub fn execute_instruction_read_single_bank(&self) {
unsafe impl<'a, const R: usize, const C: usize> RawStorageMut<F16x1, Const<R>, Const<C>>
for PimStorage<'a, R, C>
{
fn ptr_mut(&mut self) -> *mut F16x1 {
unsafe {
(&mut self.arena.borrow_mut().0[0][0] as *mut F16x16 as *mut F16x1)
.offset(self.index as _)
}
}
unsafe fn as_mut_slice_unchecked(&mut self) -> &mut [F16x1] {
panic!("PimStorage is not contiguous!");
}
}
// #[repr(C, align(1024))]
// #[derive(Clone, Debug, Default)]
// pub struct PimMatrix(pub SMatrix<f166, 8, 8>);
// impl PimRegion for PimMatrix {
// const NUMBER_OF_BANKS: usize = 64;
// fn bank_ptr(&self, bank_index: usize) -> *const f16 {
// return &self.0[bank_index].0 as _;
// }
// fn bank_ptr_mut(&mut self, bank_index: usize) -> *mut f16 {
// return &mut self.0[bank_index].0 as _;
// }
// }
pub trait PimRegion {
const NUMBER_OF_BANKS: usize;
fn bank_ptr(&self, bank_index: usize) -> *const f16;
fn bank_ptr_mut(&mut self, bank_index: usize) -> *mut f16;
fn execute_instruction_read_single_bank(&self) {
if !cfg!(feature = "cacheless") {
self.invalidate_bank(EVEN_BANK_INDEX);
@@ -32,7 +98,7 @@ impl BankArray {
barrier::dsb(barrier::SY);
}
pub fn execute_instruction_read_dual_bank(&self) {
fn execute_instruction_read_dual_bank(&self) {
if !cfg!(feature = "cacheless") {
self.invalidate_bank(EVEN_BANK_INDEX);
self.invalidate_bank(ODD_BANK_INDEX);
@@ -48,13 +114,13 @@ impl BankArray {
}
fn read_data_bank(&self, bank_index: usize) {
let bank = &self.0[bank_index * ELEMENTS_PER_CACHE_LINE];
let bank = self.bank_ptr(bank_index);
unsafe {
core::ptr::read_volatile(bank);
}
}
pub fn execute_instruction_write_single_bank(&mut self) {
fn execute_instruction_write_single_bank(&mut self) {
if !cfg!(feature = "cacheless") {
self.preload_zero();
barrier::dsb(barrier::SY);
@@ -70,7 +136,7 @@ impl BankArray {
barrier::dsb(barrier::SY);
}
pub fn execute_instruction_write_dual_bank(&mut self) {
fn execute_instruction_write_dual_bank(&mut self) {
if !cfg!(feature = "cacheless") {
self.preload_zero();
barrier::dsb(barrier::SY);
@@ -89,40 +155,40 @@ impl BankArray {
}
fn write_data_bank(&mut self, bank_index: usize) {
let bank = &mut self.0[bank_index * ELEMENTS_PER_CACHE_LINE];
let bank = self.bank_ptr_mut(bank_index);
unsafe {
core::ptr::write_volatile(bank, f16::ZERO);
core::ptr::write_volatile(bank, Default::default());
}
}
pub fn invalidate(&self) {
(0..NUMBER_OF_BANKS).for_each(|idx| self.invalidate_bank(idx));
fn invalidate(&self) {
(0..Self::NUMBER_OF_BANKS).for_each(|idx| self.invalidate_bank(idx));
}
fn invalidate_bank(&self, bank_index: usize) {
let bank = &self.0[bank_index * ELEMENTS_PER_CACHE_LINE];
let bank = self.bank_ptr(bank_index);
unsafe {
asm!("dc ivac, {val}", val = in(reg) bank);
}
}
pub fn invalidate_flush(&self) {
(0..NUMBER_OF_BANKS).for_each(|idx| self.invalidate_flush_bank(idx));
fn invalidate_flush(&self) {
(0..Self::NUMBER_OF_BANKS).for_each(|idx| self.invalidate_flush_bank(idx));
}
fn invalidate_flush_bank(&self, bank_index: usize) {
let bank = &self.0[bank_index * ELEMENTS_PER_CACHE_LINE];
let bank = self.bank_ptr(bank_index);
unsafe {
asm!("dc civac, {val}", val = in(reg) bank);
}
}
pub fn preload_zero(&self) {
(0..NUMBER_OF_BANKS).for_each(|idx| self.preload_zero_bank(idx));
fn preload_zero(&self) {
(0..Self::NUMBER_OF_BANKS).for_each(|idx| self.preload_zero_bank(idx));
}
fn preload_zero_bank(&self, bank_index: usize) {
let bank = &self.0[bank_index * ELEMENTS_PER_CACHE_LINE];
let bank = self.bank_ptr(bank_index);
unsafe {
// Preload first bank
asm!("dc zva, {val}", val = in(reg) bank);
@@ -132,9 +198,9 @@ impl BankArray {
#[derive(Clone, Debug)]
#[repr(C, align(65536))]
pub struct ComputeArray<const N: usize>(pub [BankArray; N]);
pub struct ComputeArray<T: PimRegion, const N: usize>(pub [T; N]);
impl<const N: usize> ComputeArray<N> {
impl<T: PimRegion, const N: usize> ComputeArray<T, N> {
pub fn invalidate_flush(&self) {
self.0
.iter()
@@ -146,7 +212,7 @@ impl<const N: usize> ComputeArray<N> {
}
}
impl<const N: usize> Default for ComputeArray<N> {
impl<T: PimRegion + Default, const N: usize> Default for ComputeArray<T, N> {
fn default() -> Self {
Self(core::array::from_fn(|_| Default::default()))
}