use crate::backend::{BackendDevice, BackendStorage};
use crate::op::{BinaryOpT, CmpOp, ReduceOp, UnaryOpT};
use crate::{DType, Error, IntDType, Layout, Result, Shape, WithDType};
use half::{bf16, f16};
use rayon::prelude::*;
const USE_IM2COL_CONV1D: bool = true;
const USE_IM2COL_CONV2D: bool = true;
// TODO: Maybe we should not implement [Clone] here and instead have an explicit allocator +
// intercept the oom errors to avoid panicking and provide a proper error.
#[derive(Debug, Clone)]
pub enum CpuStorage {
U8(Vec<u8>),
U32(Vec<u32>),
I64(Vec<i64>),
BF16(Vec<bf16>),
F16(Vec<f16>),
F32(Vec<f32>),
F64(Vec<f64>),
}
#[derive(Debug, Clone)]
pub struct CpuDevice;
pub trait Map1 {
fn f<T: WithDType>(&self, vs: &[T], layout: &Layout) -> Result<Vec<T>>;
fn map(&self, vs: &CpuStorage, layout: &Layout) -> Result<CpuStorage> {
match vs {
CpuStorage::U8(vs) => Ok(CpuStorage::U8(self.f(vs, layout)?)),
CpuStorage::U32(vs) => Ok(CpuStorage::U32(self.f(vs, layout)?)),
CpuStorage::I64(vs) => Ok(CpuStorage::I64(self.f(vs, layout)?)),
CpuStorage::BF16(vs) => Ok(CpuStorage::BF16(self.f(vs, layout)?)),
CpuStorage::F16(vs) => Ok(CpuStorage::F16(self.f(vs, layout)?)),
CpuStorage::F32(vs) => Ok(CpuStorage::F32(self.f(vs, layout)?)),
CpuStorage::F64(vs) => Ok(CpuStorage::F64(self.f(vs, layout)?)),
}
}
}
pub trait Map1Any {
fn f<T: WithDType, W: Fn(Vec<T>) -> CpuStorage>(
&self,
vs: &[T],
layout: &Layout,
wrap: W,
) -> Result<CpuStorage>;
fn map(&self, vs: &CpuStorage, layout: &Layout) -> Result<CpuStorage> {
match vs {
CpuStorage::U8(vs) => Ok(self.f(vs, layout, CpuStorage::U8)?),
CpuStorage::U32(vs) => Ok(self.f(vs, layout, CpuStorage::U32)?),
CpuStorage::I64(vs) => Ok(self.f(vs, layout, CpuStorage::I64)?),
CpuStorage::BF16(vs) => Ok(self.f(vs, layout, CpuStorage::BF16)?),
CpuStorage::F16(vs) => Ok(self.f(vs, layout, CpuStorage::F16)?),
CpuStorage::F32(vs) => Ok(self.f(vs, layout, CpuStorage::F32)?),
CpuStorage::F64(vs) => Ok(self.f(vs, layout, CpuStorage::F64)?),
}
}
}
type C = CpuStorage;
pub trait Map2 {
const OP: &'static str;
fn f<T: WithDType>(&self, v1: &[T], l1: &Layout, v2: &[T], l2: &Layout) -> Result<Vec<T>>;
fn map(
&self,
v1: &CpuStorage,
l1: &Layout,
v2: &CpuStorage,
l2: &Layout,
) -> Result<CpuStorage> {
match (v1, v2) {
(C::U8(v1), C::U8(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::U32(v1), C::U32(v2)) => Ok(C::U32(self.f(v1, l1, v2, l2)?)),
(C::I64(v1), C::I64(v2)) => Ok(C::I64(self.f(v1, l1, v2, l2)?)),
(C::BF16(v1), C::BF16(v2)) => Ok(C::BF16(self.f(v1, l1, v2, l2)?)),
(C::F16(v1), C::F16(v2)) => Ok(C::F16(self.f(v1, l1, v2, l2)?)),
(C::F32(v1), C::F32(v2)) => Ok(C::F32(self.f(v1, l1, v2, l2)?)),
(C::F64(v1), C::F64(v2)) => Ok(C::F64(self.f(v1, l1, v2, l2)?)),
_ => Err(Error::DTypeMismatchBinaryOp {
lhs: v1.dtype(),
rhs: v2.dtype(),
op: Self::OP,
}
.bt()),
}
}
}
pub trait Map2U8 {
const OP: &'static str;
fn f<T: WithDType>(&self, v1: &[T], l1: &Layout, v2: &[T], l2: &Layout) -> Result<Vec<u8>>;
fn map(
&self,
v1: &CpuStorage,
l1: &Layout,
v2: &CpuStorage,
l2: &Layout,
) -> Result<CpuStorage> {
match (v1, v2) {
(C::U8(v1), C::U8(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::U32(v1), C::U32(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::I64(v1), C::I64(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::BF16(v1), C::BF16(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::F16(v1), C::F16(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::F32(v1), C::F32(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
(C::F64(v1), C::F64(v2)) => Ok(C::U8(self.f(v1, l1, v2, l2)?)),
_ => Err(Error::DTypeMismatchBinaryOp {
lhs: v1.dtype(),
rhs: v2.dtype(),
op: Self::OP,
}
.bt()),
}
}
}
struct Cmp(CmpOp);
impl Map2U8 for Cmp {
const OP: &'static str = "cmp";
#[inline(always)]
fn f<T: WithDType>(
&self,
lhs: &[T],
lhs_l: &Layout,
rhs: &[T],
rhs_l: &Layout,
) -> Result<Vec<u8>> {
let dst = match self.0 {
CmpOp::Eq => binary_map(lhs_l, rhs_l, lhs, rhs, |x, y| u8::from(x == y)),
CmpOp::Ne => binary_map(lhs_l, rhs_l, lhs, rhs, |x, y| u8::from(x != y)),
CmpOp::Lt => binary_map(lhs_l, rhs_l, lhs, rhs, |x, y| u8::from(x < y)),
CmpOp::Le => binary_map(lhs_l, rhs_l, lhs, rhs, |x, y| u8::from(x <= y)),
CmpOp::Gt => binary_map(lhs_l, rhs_l, lhs, rhs, |x, y| u8::from(x > y)),
CmpOp::Ge => binary_map(lhs_l, rhs_l, lhs, rhs, |x, y| u8::from(x >= y)),
};
Ok(dst)
}
}
struct WCond<'a, T: IntDType>(&'a [T], &'a Layout);
impl<'a, I: IntDType> Map2 for WCond<'a, I> {
const OP: &'static str = "where";
#[inline(always)]
fn f<T: WithDType>(&self, t: &[T], t_l: &Layout, f: &[T], f_l: &Layout) -> Result<Vec<T>> {
let vs = match (
self.1.contiguous_offsets(),
t_l.contiguous_offsets(),
f_l.contiguous_offsets(),
) {
(Some((o1, o2)), Some((o_t1, o_t2)), Some((o_f1, o_f2))) => {
let pred = &self.0[o1..o2];
let t = &t[o_t1..o_t2];
let f = &f[o_f1..o_f2];
pred.iter()
.zip(t.iter().zip(f.iter()))
.map(|(p, (&t, &f))| if p.is_true() { t } else { f })
.collect::<Vec<_>>()
}
_ => self
.1
.strided_index()
.zip(t_l.strided_index().zip(f_l.strided_index()))
.map(|(i_p, (i_t, i_f))| {
if self.0[i_p].is_true() {
t[i_t]
} else {
f[i_f]
}
})
.collect::<Vec<_>>(),
};
Ok(vs)
}
}
struct ReduceIndex {
reduce_dim_index: usize,
use_min: bool,
return_index: bool,
}
impl ReduceIndex {
// The value gets replaced if f(s[current_acc], s[i]) returns true.
#[inline(always)]
fn fold_impl<T, U, F, G>(&self, src: &[T], src_l: &Layout, f: F, g: G) -> Result<Vec<U>>
where
T: Clone + Copy,
U: Clone + Copy,
F: Fn(T, T) -> bool,
G: Fn(T, usize) -> U,
{
let reduce_dim_size = src_l.dims()[self.reduce_dim_index];
let reduce_dim_stride = src_l.stride()[self.reduce_dim_index];
let dst_len = src_l.shape().elem_count() / reduce_dim_size;
let mut dst: Vec<U> = Vec::with_capacity(dst_len);
let dst_to_set = dst.spare_capacity_mut();
let dst_to_set = unsafe { std::mem::transmute::<_, &mut [U]>(dst_to_set) };
match src_l.contiguous_offsets() {
Some((o1, o2)) => {
let src = &src[o1..o2];
if reduce_dim_stride == 1 {
for (start_src_i, dst_v) in dst_to_set.iter_mut().enumerate() {
let start_src_i = start_src_i * reduce_dim_size;
let src = &src[start_src_i..start_src_i + reduce_dim_size];
let mut acc = 0;
let mut val = src[0];
for (src_i, &s) in src.iter().enumerate() {
if f(val, s) {
acc = src_i;
val = s
}
}
*dst_v = g(val, acc)
}
} else {
for (start_src_i, dst_v) in dst_to_set.iter_mut().enumerate() {
let (p, q) = (
start_src_i / reduce_dim_stride,
start_src_i % reduce_dim_stride,
);
// start_src_i = p * reduce_dim_stride + q
let start_src_i = p * reduce_dim_stride * reduce_dim_size + q;
let src = &src[start_src_i..];
let mut acc = 0;
let mut val = src[0];
for src_i in 0..reduce_dim_size {
let s = src[src_i * reduce_dim_stride];
if f(val, s) {
acc = src_i;
val = s
}
}
*dst_v = g(val, acc)
}
}
}
None => {
let l = src_l.narrow(self.reduce_dim_index, 0, 1)?;
for (unstr_index, src_index) in l.strided_index().enumerate() {
let src = &src[src_index..];
let mut acc = 0;
let mut val = src[0];
for src_i in 0..reduce_dim_size {
let s = src[src_i * reduce_dim_stride];
if f(val, s) {
acc = src_i;
val = s
}
}
dst_to_set[unstr_index] = g(val, acc)
}
}
}
unsafe { dst.set_len(dst_len) };
Ok(dst)
}
}
impl Map1Any for ReduceIndex {
#[inline(always)]
fn f<T: WithDType, W: Fn(Vec<T>) -> CpuStorage>(
&self,
src: &[T],
src_l: &Layout,
wrap: W,
) -> Result<CpuStorage> {
if src_l.shape().elem_count() == 0 {
Err(Error::EmptyTensor { op: "reduce" }.bt())?
}
let dst = match (self.return_index, self.use_min) {
(false, true) => wrap(self.fold_impl(src, src_l, |x, y| x > y, |v, _i| v)?),
(false, false) => wrap(self.fold_impl(src, src_l, |x, y| x < y, |v, _i| v)?),
(true, true) => {
CpuStorage::U32(self.fold_impl(src, src_l, |x, y| x > y, |_v, i| i as u32)?)
}
(true, false) => {
CpuStorage::U32(self.fold_impl(src, src_l, |x, y| x < y, |_v, i| i as u32)?)
}
};
Ok(dst)
}
}
struct ReduceSum<'a> {
dst_shape: &'a Shape,
reduce_dims: &'a [usize],
reduce_dims_and_stride: Vec<(usize, usize)>,
}
impl<'a> ReduceSum<'a> {
#[inline(always)]
fn fold_impl<T>(&self, src: &[T], src_l: &Layout, start_elt: T) -> Result<Vec<T>>
where
T: WithDType,
{
let mut dst = vec![start_elt; self.dst_shape.elem_count()];
match src_l.contiguous_offsets() {
Some((o1, o2)) => {
let src = &src[o1..o2];
// Handle the case where we reduce over the last dimensions separately as it is
// fairly common and easy to optimize. This rely on the layout being contiguous!
// reduce_dims is sorted, check if it is ranging from a to n-1.
let reduce_over_last_dims = self
.reduce_dims
.iter()
.rev()
.enumerate()
.all(|(i, &v)| v == src_l.shape().rank() - 1 - i);
if reduce_over_last_dims {
let reduce_sz = self
.reduce_dims_and_stride
.iter()
.map(|(u, _)| u)
.product::<usize>();
for (dst_i, dst_v) in dst.iter_mut().enumerate() {
let src_i = dst_i * reduce_sz;
unsafe {
T::vec_reduce_sum(
src[src_i..src_i + reduce_sz].as_ptr(),
dst_v,
reduce_sz,
)
};
}
return Ok(dst);
};
for (unstr_index, &src) in src.iter().enumerate() {
let mut dst_index = unstr_index;
// Set the reduce_dims indexes to 0.
for &(dim, stride) in self.reduce_dims_and_stride.iter() {
// The compiler is able to optimize the following in a single divmod op.
let (pre, post) = (dst_index / stride, dst_index % stride);
dst_index = (pre / dim) * stride + post;
}
dst[dst_index] += src;
}
}
None => {
for (unstr_index, src_index) in src_l.strided_index().enumerate() {
let mut dst_index = unstr_index;
// Set the reduce_dims indexes to 0.
for &(dim, stride) in self.reduce_dims_and_stride.iter() {
// The compiler is able to optimize the following in a single divmod op.
let (pre, post) = (dst_index / stride, dst_index % stride);
dst_index = (pre / dim) * stride + post;
}
dst[dst_index] += src[src_index];
}
}
}
Ok(dst)
}
}
impl<'a> Map1 for ReduceSum<'a> {
#[inline(always)]
fn f<T: WithDType>(&self, src: &[T], src_l: &Layout) -> Result<Vec<T>> {
self.fold_impl(src, src_l, T::zero())
}
}
pub fn unary_map<T: Copy, U: Copy, F: FnMut(T) -> U>(
vs: &[T],
layout: &Layout,
mut f: F,
) -> Vec<U> {
match layout.strided_blocks() {
crate::StridedBlocks::SingleBlock { start_offset, len } => vs
[start_offset..start_offset + len]
.iter()
.map(|&v| f(v))
.collect(),
crate::StridedBlocks::MultipleBlocks {
block_start_index,
block_len,
} => {
let mut result = Vec::with_capacity(layout.shape().elem_count());
// Specialize the case where block_len is one to avoid the second loop.
if block_len == 1 {
for index in block_start_index {
let v = unsafe { vs.get_unchecked(index) };
result.push(f(*v))
}
} else {
for index in block_start_index {
for offset in 0..block_len {
let v = unsafe { vs.get_unchecked(index + offset) };
result.push(f(*v))
}
}
}
result
}
}
}
pub fn unary_map_vec<T: Copy, U: Copy, F: FnMut(T) -> U, FV: FnMut(&[T], &mut [U])>(
vs: &[T],
layout: &Layout,
mut f: F,
mut f_vec: FV,
) -> Vec<U> {
match layout.strided_blocks() {
crate::StridedBlocks::SingleBlock { start_offset, len } => {
let mut ys: Vec<U> = Vec::with_capacity(len);
let ys_to_set = ys.spare_capacity_mut();
let ys_to_set = unsafe { std::mem::transmute::<_, &mut [U]>(ys_to_set) };
f_vec(&vs[start_offset..start_offset + len], ys_to_set);
// SAFETY: values are all set by f_vec.
unsafe { ys.set_len(len) };
ys
}
crate::StridedBlocks::MultipleBlocks {
block_start_index,
block_len,
} => {
let el_count = layout.shape().elem_count();
// Specialize the case where block_len is one to avoid the second loop.
if block_len == 1 {
let mut result = Vec::with_capacity(el_count);
for index in block_start_index {
let v = unsafe { vs.get_unchecked(index) };
result.push(f(*v))
}
result
} else {
let mut ys: Vec<U> = Vec::with_capacity(el_count);
let ys_to_set = ys.spare_capacity_mut();
let ys_to_set = unsafe { std::mem::transmute::<_, &mut [U]>(ys_to_set) };
let mut dst_index = 0;
for src_index in block_start_index {
let vs = &vs[src_index..src_index + block_len];
let ys = &mut ys_to_set[dst_index..dst_index + block_len];
f_vec(vs, ys);
dst_index += block_len;
}
// SAFETY: values are all set by f_vec.
unsafe { ys.set_len(el_count) };
ys
}
}
}
}
// This function maps over two strided index sequences.
pub fn binary_map<T: Copy, U: Copy, F: FnMut(T, T) -> U>(
lhs_l: &Layout,
rhs_l: &Layout,
lhs: &[T],
rhs: &[T],
mut f: F,
) -> Vec<U> {
match (lhs_l.contiguous_offsets(), rhs_l.contiguous_offsets()) {
(Some((o_l1, o_l2)), Some((o_r1, o_r2))) => lhs[o_l1..o_l2]
.iter()
.zip(rhs[o_r1..o_r2].iter())
.map(|(&l, &r)| f(l, r))
.collect(),
(Some((o_l1, o_l2)), None) => {
// TODO: Maybe we want to avoid going through the layout twice.
match rhs_l.offsets_b() {
Some(ob) => {
let mut i_in_block = 0;
let mut i_right_broadcast = 0;
lhs[o_l1..o_l2]
.iter()
.map(|&l| {
let r = unsafe { rhs.get_unchecked(i_in_block + ob.start) };
i_right_broadcast += 1;
if i_right_broadcast >= ob.right_broadcast {
i_in_block += 1;
i_right_broadcast = 0;
}
if i_in_block >= ob.len {
i_in_block = 0
}
f(l, *r)
})
.collect()
}
None => lhs_l
.strided_index()
.zip(rhs_l.strided_index())
.map(|(lhs_i, rhs_i)| f(lhs[lhs_i], rhs[rhs_i]))
.collect(),
}
}
(None, Some((o_r1, o_r2))) => {
// TODO: Maybe we want to avoid going through the layout twice.
match lhs_l.offsets_b() {
Some(ob) => {
let mut i_in_block = 0;
let mut i_right_broadcast = 0;
rhs[o_r1..o_r2]
.iter()
.map(|&r| {
let l = unsafe { lhs.get_unchecked(i_in_block + ob.start) };
i_right_broadcast += 1;
if i_right_broadcast >= ob.right_broadcast {
i_in_block += 1;
i_right_broadcast = 0;
}
if i_in_block >= ob.len {
i_in_block = 0
}
f(*l, r)
})
.collect()
}
None => lhs_l
.strided_index()
.zip(rhs_l.strided_index())
.map(|(lhs_i, rhs_i)| f(lhs[lhs_i], rhs[rhs_i]))
.collect(),
}
}
_ => lhs_l
.strided_index()
.zip(rhs_l.strided_index())
.map(|(lhs_i, rhs_i)| f(lhs[lhs_i], rhs[rhs_i]))
.collect(),
}
}
// Similar to binary_map but with vectorized variants.
pub fn binary_map_vec<T: Copy, F: FnMut(T, T) -> T, FV: FnMut(&[T], &[T], &mut [T])>(
lhs_l: &Layout,
rhs_l: &Layout,
lhs: &[T],
rhs: &[T],
mut f: F,
mut f_vec: FV,
) -> Vec<T> {
let el_count = lhs_l.shape().elem_count();
match (lhs_l.contiguous_offsets(), rhs_l.contiguous_offsets()) {
(Some((o_l1, o_l2)), Some((o_r1, o_r2))) => {
let mut ys: Vec<T> = Vec::with_capacity(el_count);
let ys_to_set = ys.spare_capacity_mut();
let ys_to_set = unsafe { std::mem::transmute::<_, &mut [T]>(ys_to_set) };
f_vec(&lhs[o_l1..o_l2], &rhs[o_r1..o_r2], ys_to_set);
// SAFETY: values are all set by f_vec.
unsafe { ys.set_len(el_count) };
ys
}
(Some((o_l1, o_l2)), None) => match rhs_l.offsets_b() {
Some(ob) if ob.right_broadcast == 1 => {
let rhs = &rhs[ob.start..ob.start + ob.len];
let mut ys: Vec<T> = Vec::with_capacity(el_count);
let ys_to_set = ys.spare_capacity_mut();
let ys_to_set = unsafe { std::mem::transmute::<_, &mut [T]>(ys_to_set) };
let mut dst_i = 0;
for src_i in (o_l1..o_l2).step_by(ob.len) {
f_vec(
&lhs[src_i..src_i + ob.len],
rhs,
&mut ys_to_set[dst_i..dst_i + ob.len],
);
dst_i += ob.len;
}
// SAFETY: values are all set by f_vec.
unsafe { ys.set_len(el_count) };
ys
}
Some(ob) => {
let rhs = &rhs[ob.start..ob.start + ob.len];
let mut ys = lhs[o_l1..o_l2].to_vec();
for idx_l in 0..ob.left_broadcast {
let start = idx_l * ob.len * ob.right_broadcast;
for (i, &r) in rhs.iter().enumerate() {
let start = start + i * ob.right_broadcast;
for v in ys[start..start + ob.right_broadcast].iter_mut() {
*v = f(*v, r)
}
}
}
ys
}
None => lhs_l
.strided_index()
.zip(rhs_l.strided_index())
.map(|(lhs_i, rhs_i)| f(lhs[lhs_i], rhs[rhs_i]))
.collect(),
},
(None, Some((o_r1, o_r2))) => match lhs_l.offsets_b() {
Some(ob) if ob.right_broadcast == 1 => {
let lhs = &lhs[ob.start..ob.start + ob.len];
let mut ys: Vec<T> = Vec::with_capacity(el_count);
let ys_to_set = ys.spare_capacity_mut();
let ys_to_set = unsafe { std::mem::transmute::<_, &mut [T]>(ys_to_set) };
let mut dst_i = 0;
for src_i in (o_r1..o_r2).step_by(ob.len) {
f_vec(
lhs,
&rhs[src_i..src_i + ob.len],
&mut ys_to_set[dst_i..dst_i + ob.len],
);
dst_i += ob.len;
}
// SAFETY: values are all set by f_vec.
unsafe { ys.set_len(el_count) };
ys
}
Some(ob) => {
let lhs = &lhs[ob.start..ob.start + ob.len];
let mut ys = rhs[o_r1..o_r2].to_vec();
for idx_l in 0..ob.left_broadcast {
let start = idx_l * ob.len * ob.right_broadcast;
for (i, &l) in lhs.iter().enumerate() {
let start = start + i * ob.right_broadcast;
for v in ys[start..start + ob.right_broadcast].iter_mut() {
*v = f(l, *v)
}
}
}
ys
}
None => lhs_l
.strided_index()
.zip(rhs_l.strided_index())
.map(|(lhs_i, rhs_i)| f(lhs[lhs_i], rhs[rhs_i]))
.collect(),
},
_ => lhs_l
.strided_index()
.zip(rhs_l.strided_index())
.map(|(lhs_i, rhs_i)| f(lhs[lhs_i], rhs[rhs_i]))
.collect(),
}
}
struct Affine(f64, f64);
impl Map1 for Affine {
fn f<T: WithDType>(&self, vs: &[T], layout: &Layout) -> Result<Vec<T>> {
let mul = T::from_f64(self.0);
let add = T::from_f64(self.1);
Ok(unary_map(vs, layout, |v| v * mul + add))
}
}
struct AvgPool2D((usize, usize), (usize, usize));
impl Map1 for AvgPool2D {
fn f<T: WithDType>(&self, src: &[T], layout: &Layout) -> Result<Vec<T>> {
// https://pytorch.org/docs/stable/generated/torch.nn.AvgPool2d.html
let (k_h, k_w) = self.0;
let (s_h, s_w) = self.1;
let (b_sz, c, h, w) = layout.shape().dims4()?;
let stride = layout.stride();
let (stride_h, stride_w) = (stride[2], stride[3]);
let h_out = (h - k_h) / s_h + 1;
let w_out = (w - k_w) / s_w + 1;
let src_index = layout.start_offset();
let mut dst = vec![T::zero(); b_sz * c * h_out * w_out];
let scale = 1f64 / (k_h * k_w) as f64;
let scale = T::from_f64(scale);
for b_idx in 0..b_sz {
let dst = &mut dst[b_idx * c * h_out * w_out..];
let src_index = src_index + b_idx * stride[0];
for c_idx in 0..c {
let dst = &mut dst[c_idx * h_out * w_out..];
let src_index = src_index + c_idx * stride[1];
for h_idx in 0..h_out {
for w_idx in 0..w_out {
let mut sum = T::zero();
for m in 0..k_h {
for n in 0..k_w {
let m = s_h * h_idx + m;
let n = s_w * w_idx + n;
sum += src[src_index + m * stride_h + n * stride_w]
}
}
dst[h_idx * w_out + w_idx] = sum * scale;
}
}
}
}
Ok(dst)
}
}
struct MaxPool2D((usize, usize), (usize, usize));
impl Map1 for MaxPool2D {
fn f<T: WithDType>(&self, src: &[T], layout: &Layout) -> Result<Vec<T>> {
// https://pytorch.org/docs/stable/generated/torch.nn.MaxPool2d.html
let (k_h, k_w) = self.0;
let (s_h, s_w) = self.1;
let (b_sz, c, h, w) = layout.shape().dims4()?;
let stride = layout.stride();
let (stride_h, stride_w) = (stride[2], stride[3]);
let h_out = (h - k_h) / s_h + 1;
let w_out = (w - k_w) / s_w + 1;
let src_index = layout.start_offset();
let mut dst = vec![T::zero(); b_sz * c * h_out * w_out];
for b_idx in 0..b_sz {
let dst = &mut dst[b_idx * c * h_out * w_out..];
let src_index = src_index + b_idx * stride[0];
for c_idx in 0..c {
let dst = &mut dst[c_idx * h_out * w_out..];
let src_index = src_index + c_idx * stride[1];
for h_idx in 0..h_out {
for w_idx in 0..w_out {
let mut largest =
src[src_index + s_h * h_idx * stride_h + s_w * w_idx * stride_w];
for m in 0..k_h {
for n in 0..k_w {
let m = s_h * h_idx + m;
let n = s_w * w_idx + n;
if largest < src[src_index + m * stride_h + n * stride_w] {
largest = src[src_index + m * stride_h + n * stride_w]
}
}
}
dst[h_idx * w_out + w_idx] = largest;
}
}
}
}
Ok(dst)
}
}
struct UpsampleNearest1D(usize);
impl Map1 for UpsampleNearest1D {
fn f<T: WithDType>(&self, src: &[T], layout: &Layout) -> Result<Vec<T>> {
// TODO: Specialized implementation for the case 2*sz?
let dst_sz = self.0;
let (b_sz, c, src_sz) = layout.shape().dims3()?;
let stride = layout.stride();
let stride_sz = stride[2];
let src_index = layout.start_offset();
let scale_sz = src_sz as f64 / dst_sz as f64;
let mut dst = vec![T::zero(); b_sz * c * dst_sz];
let src_idxs = (0..dst_sz)
.map(|idx| usize::min(src_sz - 1, (idx as f64 * scale_sz) as usize))
.collect::<Vec<_>>();
for b_idx in 0..b_sz {
let dst = &mut dst[b_idx * c * dst_sz..];
let src_index = src_index + b_idx * stride[0];
for c_idx in 0..c {
let dst = &mut dst[c_idx * dst_sz..];
let src_index = src_index + c_idx * stride[1];
for (idx, src_idx) in src_idxs.iter().enumerate() {
dst[idx] = src[src_index + src_idx * stride_sz]
}
}
}
Ok(dst)
}
}
struct UpsampleNearest2D(usize, usize);
impl Map1 for UpsampleNearest2D {
fn f<T: WithDType>(&self, src: &[T], layout: &Layout) -> Result<Vec<T>> {
// TODO: Specialized implementation for the case 2*h, 2*w?
let (dst_h, dst_w) = (self.0, self.1);
let (b_sz, c, src_h, src_w) = layout.shape().dims4()?;
let stride = layout.stride();
let (stride_h, stride_w) = (stride[2], stride[3]);
let src_index = layout.start_offset();
let scale_h = src_h as f64 / dst_h as f64;
let scale_w = src_w as f64 / dst_w as f64;
let mut dst = vec![T::zero(); b_sz * c * dst_h * dst_w];
let src_h_idxs = (0..dst_h)
.map(|h_idx| usize::min(src_h - 1, (h_idx as f64 * scale_h) as usize))
.collect::<Vec<_>>();
let src_w_idxs = (0..dst_w)
.map(|w_idx| usize::min(src_w - 1, (w_idx as f64 * scale_w) as usize))
.collect::<Vec<_>>();
for b_idx in 0..b_sz {
let dst = &mut dst[b_idx * c * dst_h * dst_w..];
let src_index = src_index + b_idx * stride[0];
for c_idx in 0..c {
let dst = &mut dst[c_idx * dst_h * dst_w..];
let src_index = src_index + c_idx * stride[1];
for (h_idx, src_h_idx) in src_h_idxs.iter().enumerate() {
for (w_idx, src_w_idx) in src_w_idxs.iter().enumerate() {
let src_index = src_index + src_h_idx * stride_h + src_w_idx * stride_w;
dst[h_idx * dst_w + w_idx] = src[src_index]
}
}
}
}
Ok(dst)
}
}
struct Gather<'a, I: IntDType> {
ids: &'a [I],
ids_l: &'a Layout,
dim: usize,
}
impl<'a, I: IntDType> Map1 for Gather<'a, I> {
fn f<T: WithDType>(&self, src: &[T], src_l: &Layout) -> Result<Vec<T>> {
let ids = match self.ids_l.contiguous_offsets() {
Some((a, b)) => &self.ids[a..b],
None => Err(Error::RequiresContiguous { op: "gather" }.bt())?,
};
let src = match src_l.contiguous_offsets() {
Some((a, b)) => &src[a..b],
None => Err(Error::RequiresContiguous { op: "gather" }.bt())?,
};
let dim = self.dim;
let ids_dims = self.ids_l.dims();
let src_dims = src_l.dims();
let dst_len: usize = ids_dims.iter().product();
let dst_left_len: usize = ids_dims[..dim].iter().product();
let dst_dim_len = ids_dims[dim];
let dst_right_len: usize = ids_dims[dim + 1..].iter().product();
let src_dim_len = src_dims[dim];
let src_right_len: usize = src_dims[dim + 1..].iter().product();
let mut dst = vec![T::zero(); dst_len];
for left_i in 0..dst_left_len {
let start_src_idx = left_i * src_right_len * src_dim_len;
let start_dst_idx = left_i * dst_right_len * dst_dim_len;
for i in 0..dst_dim_len {
let start_dst_idx = start_dst_idx + i * dst_right_len;
for right_i in 0..dst_right_len {
let dst_idx = start_dst_idx + right_i;
let index = ids[dst_idx].as_usize();
if index >= src_dim_len {
Err(Error::InvalidIndex {
index,
size: src_dim_len,
op: "gather",
}
.bt())?
}
let src_idx = start_src_idx + index * src_right_len + right_i;
dst[dst_idx] = src[src_idx]
}
}
}
Ok(dst)
}
}
struct IndexSelect<'a, T: IntDType> {
ids: &'a [T],
ids_l: &'a Layout,
dim: usize,
}
impl<'a, I: IntDType> Map1 for IndexSelect<'a, I> {
fn f<T: WithDType>(&self, src: &[T], layout: &Layout) -> Result<Vec<T>> {
let src = match layout.contiguous_offsets() {
Some((a, b)) => &src[a..b],
None => Err(Error::RequiresContiguous { op: "index-select" }.bt())?,
};
let dim = self.dim;
let n_ids = match self.ids_l.dims() {
[n_ids] => *n_ids,
d => Err(Error::UnexpectedNumberOfDims {
expected: 1,
got: d.len(),
shape: self.ids_l.shape().clone(),
}
.bt())?,
};
let stride_ids = self.ids_l.stride()[0];
let mut dst_dims = layout.dims().to_vec();
let src_dim = dst_dims[dim];
dst_dims[dim] = n_ids;
let dst_len: usize = dst_dims.iter().product();
let left_len: usize = dst_dims[..dim].iter().product();
let right_len: usize = dst_dims[dim + 1..].iter().product();
let mut dst = vec![T::zero(); dst_len];
for left_i in 0..left_len {
let start_src_idx = left_i * right_len * src_dim;
let start_dst_idx = left_i * right_len * n_ids;
for i in 0..n_ids {
let index = self.ids[self.ids_l.start_offset() + stride_ids * i].as_usize();
if index >= src_dim {
Err(Error::InvalidIndex {
index,
size: src_dim,
op: "index-select",
}
.bt())?
}
let start_src_idx = start_src_idx + index * right_len;
let start_dst_idx = start_dst_idx + i * right_len;
dst[start_dst_idx..start_dst_idx + right_len]
.copy_from_slice(&src[start_src_idx..start_src_idx + right_len])
}
}
Ok(dst)
}
}
struct ScatterAdd<'a, I: IntDType> {
ids: &'a [I],
ids_l: &'a Layout,
dim: usize,
}
impl<'a, I: IntDType> Map2 for ScatterAdd<'a, I> {
const OP: &'static str = "scatter-add";
fn f<T: WithDType>(&self, v1: &[T], l1: &Layout, src: &[T], src_l: &Layout) -> Result<Vec<T>> {
let dst_len = l1.shape().elem_count();
let mut dst = vec![T::zero(); dst_len];
copy_strided_src_(v1, &mut dst, 0, l1);
let src = match src_l.contiguous_offsets() {
None => Err(Error::RequiresContiguous { op: "scatter-add" }.bt())?,
Some((o1, o2)) => &src[o1..o2],
};
let dim = self.dim;
let ids_dims = self.ids_l.dims();
let dst_dims = l1.dims();
let dst_dim_len = dst_dims[dim];
let dst_right_len: usize = dst_dims[dim + 1..].iter().product();
let ids_left_len: usize = ids_dims[..dim].iter().product();
let ids_dim_len = ids_dims[dim];
let ids_right_len: usize = ids_dims[dim + 1..].iter().product();
let ids = match self.ids_l.contiguous_offsets() {
Some((a, b)) => &self.ids[a..b],
None => Err(Error::RequiresContiguous { op: "gather" }.bt())?,
};
for left_i in 0..ids_left_len {
let start_ids_idx = left_i * ids_right_len * ids_dim_len;
let start_dst_idx = left_i * dst_right_len * dst_dim_len;
for i in 0..ids_dim_len {
let start_ids_idx = start_ids_idx + i * ids_right_len;
for right_i in 0..dst_right_len {
let ids_idx = start_ids_idx + right_i;
let index = ids[ids_idx].as_usize();
if index >= dst_dim_len {
Err(Error::InvalidIndex {
index,
size: dst_dim_len,
op: "gather",
}
.bt())?
}
let dst_idx = start_dst_idx + index * dst_right_len + right_i;
dst[dst_idx] += src[ids_idx]
}
}
}
Ok(dst)
}
}
struct IndexAdd<'a, I: IntDType> {
ids: &'a [I],
dim: usize,
}
impl<'a, I: IntDType> Map2 for IndexAdd<'a, I> {
const OP: &'static str = "index-add";
// https://pytorch.org/docs/stable/generated/torch.Tensor.index_add_.html#torch.Tensor.index_add_
// v1, l1 -> self
fn f<T: WithDType>(&self, v1: &[T], l1: &Layout, src: &[T], src_l: &Layout) -> Result<Vec<T>> {
let dst_len = l1.shape().elem_count();
let mut dst = vec![T::zero(); dst_len];
copy_strided_src_(v1, &mut dst, 0, l1);
let src = match src_l.contiguous_offsets() {
None => Err(Error::RequiresContiguous { op: "index-add" }.bt())?,
Some((o1, o2)) => &src[o1..o2],
};
let dim = self.dim;
let max_idx = l1.dims()[dim];
let pre_dim = src_l.dims()[..dim].iter().product::<usize>();
let src_dim_sz = src_l.dims()[dim];
let post_dim = src_l.dims()[dim + 1..].iter().product::<usize>();
if dim == 0 {
for (src_idx, dst_idx) in self.ids.iter().enumerate() {
let dst_idx = dst_idx.as_usize();
if dst_idx >= max_idx {
Err(Error::InvalidIndex {
index: dst_idx,
op: "index-add",
size: max_idx,
})?
}
let src_idx = src_idx * post_dim;
let dst_idx = dst_idx * post_dim;
let src = &src[src_idx..src_idx + post_dim];
let dst = &mut dst[dst_idx..dst_idx + post_dim];
for (d, &s) in dst.iter_mut().zip(src.iter()) {
*d += s
}
}
} else {
for (src_idx, dst_idx) in self.ids.iter().enumerate() {
let dst_idx = dst_idx.as_usize();
if dst_idx >= max_idx {
Err(Error::InvalidIndex {
index: dst_idx,
op: "index-add",
size: max_idx,
})?
}
for pre_i in 0..pre_dim {
let pre_src_i = (pre_i * src_dim_sz + src_idx) * post_dim;
let pre_dst_i = (pre_i * max_idx + dst_idx) * post_dim;
let src = &src[pre_src_i..pre_src_i + post_dim];
let dst = &mut dst[pre_dst_i..pre_dst_i + post_dim];
for (d, &s) in dst.iter_mut().zip(src.iter()) {
*d += s
}
}
}
}
Ok(dst)
}
}
fn copy_strided_src_<T: Copy>(src: &[T], dst: &mut [T], dst_offset: usize, src_l: &Layout) {
match src_l.strided_blocks() {
crate::StridedBlocks::SingleBlock { start_offset, len } => {
let to_copy = (dst.len() - dst_offset).min(len);
dst[dst_offset..dst_offset + to_copy]
.copy_from_slice(&src[start_offset..start_offset + to_copy])
}
crate::StridedBlocks::MultipleBlocks {
block_start_index,
block_len: 1,
} => {
for (dst_index, src_index) in block_start_index.enumerate() {
let dst_index = dst_index + dst_offset;
if dst_index >= dst.len() {
break;
}
dst[dst_index] = src[src_index]
}
}
crate::StridedBlocks::MultipleBlocks {
block_start_index,
block_len,
} => {
let mut dst_index = dst_offset;
for src_index in block_start_index {
let next_dst_index = dst_index + block_len;
if dst_index >= dst.len() {
break;
}
let to_copy = usize::min(block_len, dst.len() - dst_index);
dst[dst_index..dst_index + to_copy]
.copy_from_slice(&src[src_index..src_index + to_copy]);
dst_index = next_dst_index
}
}
}
}
struct Conv1D<'a>(&'a crate::conv::ParamsConv1D);
impl<'a> Map2 for Conv1D<'a> {
const OP: &'static str = "conv1d";
fn f<T: WithDType>(&self, inp: &[T], inp_l: &Layout, k: &[T], k_l: &Layout) -> Result<Vec<T>> {
let p = self.0;
let inp = &inp[inp_l.start_offset()..];
let k = &k[k_l.start_offset()..];
let (inp_s0, inp_s1, inp_s2) = crate::shape::dims3(inp_l.stride())?;
let (k_s0, k_s1, k_s2) = crate::shape::dims3(k_l.stride())?;
let l_out = p.l_out();
let dst_elems = p.c_out * l_out * p.b_size;
// The output shape is [b_size, c_out, l_out]
let dst = vec![T::zero(); dst_elems];
// TODO: Avoid making this copy if `inp` already has the appropriate layout.
let mut inp_cont = vec![T::zero(); p.b_size * p.c_in * p.l_in];
for b_idx in 0..p.b_size {
for src_l in 0..p.l_in {
for src_c_idx in 0..p.c_in {
let inp_idx = b_idx * inp_s0 + src_c_idx * inp_s1 + src_l * inp_s2;
inp_cont[b_idx * p.l_in * p.c_in + src_l * p.c_in + src_c_idx] = inp[inp_idx]
}
}
}
for offset in 0..p.k_size {
(0..p.c_out).into_par_iter().for_each(|dst_c_idx| {
let dst_idx = dst_c_idx * l_out;
let k_cont = (0..p.c_in)
.map(|c_in_idx| k[dst_c_idx * k_s0 + c_in_idx * k_s1 + offset * k_s2])
.collect::<Vec<_>>();
for b_idx in 0..p.b_size {
let dst_idx = dst_idx + b_idx * p.c_out * l_out;
for dst_l in 0..l_out {
let dst_idx = dst_idx + dst_l;
let src_l = p.stride * dst_l + offset * p.dilation;
if src_l < p.padding || src_l >= p.padding + p.l_in {
continue;
}
let src_l = src_l - p.padding;
let inp_cont = &inp_cont[b_idx * p.l_in * p.c_in + src_l * p.c_in..];
assert!(inp_cont.len() >= p.c_in);
assert!(k_cont.len() >= p.c_in);
let mut d = T::zero();
unsafe { T::vec_dot(inp_cont.as_ptr(), k_cont.as_ptr(), &mut d, p.c_in) }
let dst_p = dst.as_ptr();
// Safety: dst_idx are uniques per dst_c_idx which is used to parallelise
// the different tasks so no two threads can try to write at the same
// location.
unsafe {
let ptr = dst_p.add(dst_idx) as *mut T;
*ptr += d
}
}
}
})
}
Ok(dst)
}
}
struct Im2Col1D {
l_k: usize,
stride: usize,
dilation: usize,
padding: usize,
}
impl Im2Col1D {
fn l_out(&self, l: usize) -> usize {
(l + 2 * self.padding - self.dilation * (self.l_k - 1) - 1) / self.stride + 1
}
}
impl Map1 for Im2Col1D {
fn f<T: WithDType>(&self, vs: &[T], layout: &Layout) -> Result<Vec<T>> {
let &Self {
l_k,
stride,
dilation,
padding,
} = self;
let (b, c, l) = layout.shape().dims3()?;
let l_out = self.l_out(l);
let src = &vs[layout.start_offset()..];
let mut dst = vec![T::zero(); b * l_out * c * l_k];
let (src_s0, src_s1, src_s2) = {
let s = layout.stride();
(s[0], s[1], s[2])
};
// TODO: provide specialized kernels for the common use cases.
// - l_k = 1
// - padding = 0
// - stride = 1
// - dilation = 1
for b_idx in 0..b {
let src_idx = b_idx * src_s0;
let dst_idx = b_idx * l_out * c * l_k;
for l_idx in 0..l_out {
let dst_idx = dst_idx + l_idx * c * l_k;
for c_idx in 0..c {
let dst_idx = dst_idx + c_idx * l_k;
let src_idx = c_idx * src_s1 + src_idx;
for l_k_idx in 0..l_k {
let src_l = l_idx * stride + l_k_idx * dilation;
if padding != 0 && (src_l < padding || src_l >= l + padding) {
continue;
}
let src_l = src_l - padding;
let src_idx = src_idx + src_l * src_s2;
let dst_idx = dst_idx + l_k_idx;
dst[dst_idx] = src[src_idx]
}
}
}
}
Ok(dst)
}
}
struct Im2Col {
h_k: usize,
w_k: usize,
stride: usize,
dilation: usize,
padding: usize,
}
impl Im2Col {
fn hw_out(&self, h: usize, w: usize) -> (usize, usize) {
let h_out = (h + 2 * self.padding - self.dilation * (self.h_k - 1) - 1) / self.stride + 1;
let w_out = (w + 2 * self.padding - self.dilation * (self.w_k - 1) - 1) / self.stride + 1;
(h_out, w_out)
}
}
impl Map1 for Im2Col {
fn f<T: WithDType>(&self, vs: &[T], layout: &Layout) -> Result<Vec<T>> {
let &Self {
h_k,
w_k,
stride,
dilation,
padding,
} = self;
let (b, c, h, w) = layout.shape().dims4()?;
let (h_out, w_out) = self.hw_out(h, w);
let src = &vs[layout.start_offset()..];
let mut dst = vec![T::zero(); b * h_out * w_out * c * h_k * w_k];
let (src_s0, src_s1, src_s2, src_s3) = {
let s = layout.stride();
(s[0], s[1], s[2], s[3])
};
// TODO: provide specialized kernels for the common use cases.
// - h_k = w_k = 1
// - padding = 0
// - stride = 1
// - dilation = 1
for b_idx in 0..b {
let src_idx = b_idx * src_s0;
let dst_idx = b_idx * h_out * w_out * c * h_k * w_k;
for h_idx in 0..h_out {
let dst_idx = dst_idx + h_idx * w_out * c * h_k * w_k;
for w_idx in 0..w_out {
let dst_idx = dst_idx + w_idx * c * h_k * w_k;
for c_idx in 0..c {
let dst_idx = dst_idx + c_idx * h_k * w_k;
let src_idx = c_idx * src_s1 + src_idx;
for h_k_idx in 0..h_k {
let src_h = h_idx * stride + h_k_idx * dilation;
if padding != 0 && (src_h < padding || src_h >= h + padding) {
continue;
}
let src_h = src_h - padding;
let src_idx = src_idx + src_h * src_s2;
let dst_idx = dst_idx + h_k_idx * w_k;
for w_k_idx in 0..w_k {
let src_w = w_idx * stride + w_k_idx * dilation;
if padding != 0 && (src_w < padding || src_w >= w + padding) {
continue;
}
let src_w = src_w - padding;
let src_idx = src_idx + src_w * src_s3;
let dst_idx = dst_idx + w_k_idx;
dst[dst_idx] = src[src_idx]
}
}
}
}
}
}
Ok(dst)
}
}
struct ConvTranspose1D<'a>(&'a crate::conv::ParamsConvTranspose1D);
impl<'a> Map2 for ConvTranspose1D<'a> {
const OP: &'static str = "conv_transpose1d";
fn f<T: WithDType>(&self, inp: &[T], inp_l: &Layout, k: &[T], k_l: &Layout) -> Result<Vec<T>> {
let p = self.0;
let inp = &inp[inp_l.start_offset()..];
let (inp_s0, inp_s1, inp_s2) = crate::shape::dims3(inp_l.stride())?;
let (k_s0, k_s1, k_s2) = crate::shape::dims3(k_l.stride())?;
let l_out = p.l_out();
// Output shape: [b_size, c_out, l_out].
let dst_elems = p.c_out * l_out * p.b_size;
let dst = vec![T::zero(); dst_elems];
let dst_s0 = p.c_out * l_out;
let dst_s1 = l_out;
let dst_s2 = 1;
// TODO: Avoid making this copy if `inp` already has the appropriate layout.
let mut inp_cont = vec![T::zero(); p.b_size * p.c_in * p.l_in];
let cont_s0 = p.l_in * p.c_in;
let cont_s1 = p.c_in;
for b_idx in 0..p.b_size {
for l_idx in 0..p.l_in {
for c_idx in 0..p.c_in {
let src_idx = b_idx * inp_s0 + c_idx * inp_s1 + l_idx * inp_s2;
let dst_idx = b_idx * cont_s0 + l_idx * cont_s1 + c_idx;
inp_cont[dst_idx] = inp[src_idx]
}
}
}
for k_idx in 0..p.k_size {
(0..p.c_out).into_par_iter().for_each(|dst_c_idx| {
let k_cont = (0..p.c_in)
.map(|c_in_idx| k[c_in_idx * k_s0 + dst_c_idx * k_s1 + k_idx * k_s2])
.collect::<Vec<_>>();
for b_idx in 0..p.b_size {
for l_idx in 0..p.l_in {
let out_idx = l_idx * p.stride + k_idx * p.dilation;
if out_idx < p.padding {
continue;
}
let out_idx = out_idx - p.padding;
if out_idx < l_out {
let inp_cont = &inp_cont[b_idx * cont_s0 + l_idx * cont_s1..];
let dst_idx = b_idx * dst_s0 + out_idx * dst_s2 + dst_c_idx * dst_s1;
let mut d = T::zero();
unsafe {
T::vec_dot(inp_cont.as_ptr(), k_cont.as_ptr(), &mut d, p.c_in)
}
let dst_p = dst.as_ptr();
// Safety: dst_idx are uniques per dst_c_idx which is used to
// parallelise the different tasks so no two threads can try to
// write at the same location.
unsafe {
let ptr = dst_p.add(dst_idx) as *mut T;
*ptr += d
}
}
}
}
})
}
Ok(dst)
}
}
struct Conv2D<'a>(&'a crate::conv::ParamsConv2D);
impl<'a> Map2 for Conv2D<'a> {
const OP: &'static str = "conv2d";
fn f<T: WithDType>(&self, inp: &[T], inp_l: &Layout, k: &[T], k_l: &Layout) -> Result<Vec<T>> {
let p = self.0;
let inp = &inp[inp_l.start_offset()..];
let (inp_s0, inp_s1, inp_s2, inp_s3) = crate::shape::dims4(inp_l.stride())?;
let k = &k[k_l.start_offset()..];
let (k_s0, k_s1, k_s2, k_s3) = crate::shape::dims4(k_l.stride())?;
let (out_h, out_w) = (p.out_h(), p.out_w());
// Output shape: [b_size, c_out, out_h, out_w].
let dst = vec![T::zero(); p.b_size * p.c_out * out_h * out_w];
// TODO: Avoid making this copy if `inp` already has the appropriate layout.
let mut inp_cont = vec![T::zero(); p.b_size * p.c_in * p.i_h * p.i_w];
let cont_s0 = p.i_h * p.i_w * p.c_in;
let cont_s1 = p.i_w * p.c_in;
let cont_s2 = p.c_in;
for b_idx in 0..p.b_size {
for h_idx in 0..p.i_h {
for w_idx in 0..p.i_w {
for c_idx in 0..p.c_in {
let src_idx =
b_idx * inp_s0 + c_idx * inp_s1 + h_idx * inp_s2 + w_idx * inp_s3;
let dst_idx = b_idx * cont_s0 + h_idx * cont_s1 + w_idx * cont_s2 + c_idx;
inp_cont[dst_idx] = inp[src_idx]
}
}
}
}
for offset_h in 0..p.k_h {
for offset_w in 0..p.k_w {
(0..p.c_out).into_par_iter().for_each(|dst_c_idx| {
let dst_idx = dst_c_idx * out_w * out_h;
let k_cont = (0..p.c_in)
.map(|c_in_idx| {
k[dst_c_idx * k_s0
+ c_in_idx * k_s1
+ offset_h * k_s2
+ offset_w * k_s3]
})
.collect::<Vec<_>>();
for b_idx in 0..p.b_size {
let dst_idx = dst_idx + b_idx * p.c_out * out_h * out_w;
for dst_h in 0..out_h {
let dst_idx = dst_idx + dst_h * out_w;
let src_h = p.stride * dst_h + offset_h * p.dilation;
if src_h < p.padding || src_h >= p.i_h + p.padding {
continue;
}
let src_h = src_h - p.padding;
for dst_w in 0..out_w {
let dst_idx = dst_idx + dst_w;
let src_w = p.stride * dst_w + offset_w * p.dilation;
if src_w < p.padding || src_w >= p.i_w + p.padding {
continue;
}
let src_w = src_w - p.padding;
let inp_cont = &inp_cont
[b_idx * cont_s0 + src_h * cont_s1 + src_w * cont_s2..];
assert!(inp_cont.len() >= p.c_in);
assert!(k_cont.len() >= p.c_in);
let mut d = T::zero();
unsafe {
T::vec_dot(inp_cont.as_ptr(), k_cont.as_ptr(), &mut d, p.c_in)
}
let dst_p = dst.as_ptr();
// Safety: dst_idx are uniques per dst_c_idx which is used to parallelise
// the different tasks so no two threads can try to write at the same
// location.
unsafe {
let ptr = dst_p.add(dst_idx) as *mut T;
*ptr += d
}
}
}
}
});
}
}
Ok(dst)
}
}
struct ConvTranspose2D<'a>(&'a crate::conv::ParamsConvTranspose2D);
impl<'a> Map2 for ConvTranspose2D<'a> {
const OP: &'static str = "conv_transpose2d";
fn f<T: WithDType>(&self, inp: &[T], inp_l: &Layout, k: &[T], k_l: &Layout) -> Result<Vec<T>> {
let p = self.0;
let inp = &inp[inp_l.start_offset()..];
let (inp_s0, inp_s1, inp_s2, inp_s3) = crate::shape::dims4(inp_l.stride())?;
let k = &k[k_l.start_offset()..];
let (k_s0, k_s1, k_s2, k_s3) = crate::shape::dims4(k_l.stride())?;
let (out_h, out_w) = (p.out_h(), p.out_w());
// Output shape: [b_size, c_out, out_h, out_w].
let dst = vec![T::zero(); p.b_size * p.c_out * out_h * out_w];
let dst_s0 = p.c_out * out_h * out_w;
let dst_s1 = out_h * out_w;
let dst_s2 = out_w;
let dst_s3 = 1;
// TODO: Avoid making this copy if `inp` already has the appropriate layout.
let mut inp_cont = vec![T::zero(); p.b_size * p.c_in * p.i_h * p.i_w];
let cont_s0 = p.i_h * p.i_w * p.c_in;
let cont_s1 = p.i_w * p.c_in;
let cont_s2 = p.c_in;
for b_idx in 0..p.b_size {
for h_idx in 0..p.i_h {
for w_idx in 0..p.i_w {
for c_idx in 0..p.c_in {
let src_idx =
b_idx * inp_s0 + c_idx * inp_s1 + h_idx * inp_s2 + w_idx * inp_s3;
let dst_idx = b_idx * cont_s0 + h_idx * cont_s1 + w_idx * cont_s2 + c_idx;
inp_cont[dst_idx] = inp[src_idx]
}
}
}
}
for k_y in 0..p.k_h {
for k_x in 0..p.k_w {
(0..p.c_out).into_par_iter().for_each(|dst_c_idx| {
let k_cont = (0..p.c_in)
.map(|c_in_idx| {
k[c_in_idx * k_s0 + dst_c_idx * k_s1 + k_y * k_s2 + k_x * k_s3]
})
.collect::<Vec<_>>();
for b_idx in 0..p.b_size {
for inp_y in 0..p.i_h {
for inp_x in 0..p.i_w {
let out_x = inp_x * p.stride + k_x * p.dilation;
let out_y = inp_y * p.stride + k_y * p.dilation;
if out_x < p.padding || out_y < p.padding {
continue;
}
let out_x = out_x - p.padding;
let out_y = out_y - p.padding;
if out_x < out_w && out_y < out_h {
let inp_cont = &inp_cont
[b_idx * cont_s0 + inp_y * cont_s1 + inp_x * cont_s2..];
let dst_idx = b_idx * dst_s0
+ out_y * dst_s2
+ out_x * dst_s3
+ dst_c_idx * dst_s1;
let mut d = T::zero();
unsafe {
T::vec_dot(
inp_cont.as_ptr(),
k_cont.as_ptr(),
&mut d,
p.c_in,
)
}
let dst_p = dst.as_ptr();
// Safety: dst_idx are uniques per dst_c_idx which is used to
// parallelise the different tasks so no two threads can try to
// write at the same location.
unsafe {
let ptr = dst_p.add(dst_idx) as *mut T;
*ptr += d
}
}
}
}
}
})
}
}
Ok(dst)
}
}
struct MatMul((usize, usize, usize, usize));
impl MatMul {
fn striding_error(&self, lhs_l: &Layout, rhs_l: &Layout, msg: &'static str) -> Error {
Error::MatMulUnexpectedStriding(Box::new(crate::error::MatMulUnexpectedStriding {
lhs_l: lhs_l.clone(),
rhs_l: rhs_l.clone(),
bmnk: self.0,
msg,
}))
.bt()
}
}
impl Map2 for MatMul {
const OP: &'static str = "mat_mul";
#[cfg(all(not(feature = "mkl"), not(feature = "accelerate")))]
fn f<T: 'static + WithDType + num_traits::Num + Copy>(
&self,
lhs: &[T],
lhs_l: &Layout,
rhs: &[T],
rhs_l: &Layout,
) -> Result<Vec<T>> {
use gemm::{gemm, Parallelism};
match T::DTYPE {
DType::F16 | DType::F32 | DType::F64 => {}
_ => Err(Error::UnsupportedDTypeForOp(T::DTYPE, "matmul").bt())?,
}
let (b, m, n, k) = self.0;
let lhs = &lhs[lhs_l.start_offset()..];
let rhs = &rhs[rhs_l.start_offset()..];
let lhs_stride = lhs_l.stride();
let rhs_stride = rhs_l.stride();
let rank = lhs_stride.len();
let lhs_cs = lhs_stride[rank - 1];
let lhs_rs = lhs_stride[rank - 2];
let rhs_cs = rhs_stride[rank - 1];
let rhs_rs = rhs_stride[rank - 2];
let a_skip: usize = match lhs_stride[..rank - 2] {
[s1, stride] if s1 == stride * lhs_l.dims()[1] => stride,
[stride] => stride,
[] => m * k,
_ => Err(self.striding_error(lhs_l, rhs_l, "non-contiguous lhs"))?,
};
let b_skip: usize = match rhs_stride[..rank - 2] {
[s1, stride] if s1 == stride * rhs_l.dims()[1] => stride,
[stride] => stride,
[] => n * k,
_ => Err(self.striding_error(lhs_l, rhs_l, "non-contiguous rhs"))?,
};
let c_skip: usize = m * n;
let dst_shape: Shape = (m, n).into();
let dst_strides = dst_shape.stride_contiguous();
let dst_rs = dst_strides[0];
let dst_cs = dst_strides[1];
let mut dst = vec![T::zero(); b * m * n];
let num_threads = crate::utils::get_num_threads();
let parallelism = if num_threads > 1 {
Parallelism::Rayon(num_threads)
} else {
Parallelism::None
};
for step in 0..b {
let lhs_p = &lhs[step * a_skip..];
let rhs_p = &rhs[step * b_skip..];
let dst_p = &mut dst[step * c_skip..];
unsafe {
gemm(
/* m: usize = */ m,
/* n: usize = */ n,
/* k: usize = */ k,
/* dst: *mut T = */ dst_p.as_mut_ptr(),
/* dst_cs: isize = */ dst_cs as isize,
/* dst_rs: isize = */ dst_rs as isize,
/* read_dst: bool = */ false,
/* lhs: *const T = */ lhs_p.as_ptr(),
/* lhs_cs: isize = */ lhs_cs as isize,
/* lhs_rs: isize = */ lhs_rs as isize,
/* rhs: *const T = */ rhs_p.as_ptr(),
/* rhs_cs: isize = */ rhs_cs as isize,
/* rhs_rs: isize = */ rhs_rs as isize,
/* alpha: T = */ T::zero(),
/* beta: T = */ T::one(),
/* conj_dst: bool = */ false,
/* conj_lhs: bool = */ false,
/* conj_rhs: bool = */ false,
parallelism,
)
}
}
Ok(dst)
}
#[cfg(feature = "accelerate")]
fn f<T: 'static + WithDType + num_traits::Num + Copy>(
&self,
lhs: &[T],
lhs_l: &Layout,
rhs: &[T],
rhs_l: &Layout,
) -> Result<Vec<T>> {
let (b, m, n, k) = self.0;
let lhs = &lhs[lhs_l.start_offset()..];
let rhs = &rhs[rhs_l.start_offset()..];
let lhs_stride = lhs_l.stride();
let rhs_stride = rhs_l.stride();
let rank = lhs_stride.len();
let a_skip: usize = match lhs_stride[..rank - 2] {
[s1, stride] if s1 == stride * lhs_l.dims()[1] => stride,
[stride] => stride,
[] => m * k,
_ => Err(self.striding_error(lhs_l, rhs_l, "non-contiguous lhs"))?,
};
let b_skip: usize = match rhs_stride[..rank - 2] {
[s1, stride] if s1 == stride * rhs_l.dims()[1] => stride,
[stride] => stride,
[] => n * k,
_ => Err(self.striding_error(lhs_l, rhs_l, "non-contiguous rhs"))?,
};
let c_skip: usize = m * n;
let rhs_m1 = rhs_stride[rhs_stride.len() - 1];
let rhs_m2 = rhs_stride[rhs_stride.len() - 2];
let lhs_m1 = lhs_stride[lhs_stride.len() - 1];
let lhs_m2 = lhs_stride[lhs_stride.len() - 2];
let (lda, transa) = if rhs_m1 == 1 && rhs_m2 == n {
(n as i32, b'N')
} else if rhs_m1 == k && rhs_m2 == 1 {
(k as i32, b'T')
} else {
Err(self.striding_error(lhs_l, rhs_l, "non-contiguous rhs"))?
};
// The b tensor has dims batching, m, k (lhs)
let (ldb, transb) = if lhs_m1 == 1 && lhs_m2 == k {
(k as i32, b'N')
} else if lhs_m1 == m && lhs_m2 == 1 {
(m as i32, b'T')
} else {
Err(self.striding_error(lhs_l, rhs_l, "non-contiguous lhs"))?
};
let mut dst = vec![T::zero(); b * m * n];
match T::DTYPE {
DType::F16 => {
crate::bail!("the accelerate backend does not support f16 matmul")
}
DType::F32 => {
for step in 0..b {
let lhs_p = &lhs[step * a_skip..];
let rhs_p = &rhs[step * b_skip..];
let dst_p = &mut dst[step * c_skip..];
unsafe {
let a = rhs_p.as_ptr() as *const f32;
let b = lhs_p.as_ptr() as *const f32;
let c = dst_p.as_mut_ptr() as *mut f32;
let a = std::slice::from_raw_parts(a, a_skip);
let b = std::slice::from_raw_parts(b, b_skip);
let c = std::slice::from_raw_parts_mut(c, c_skip);
crate::accelerate::sgemm(
transa, transb, /* m= */ n as i32, /* n= */ m as i32,
/* k= */ k as i32, /* alpha= */ 1., /* a= */ a,
/* lda= */ lda, /* b= */ b, /* ldb= */ ldb,
/* beta= */ 0., /* c= */ c, /* ldc= */ n as i32,
)
}
}
}
DType::F64 => {
for step in 0..b {
let lhs_p = &lhs[step * a_skip..];
let rhs_p = &rhs[step * b_skip..];
let dst_p = &mut dst[step * c_skip..];
unsafe {
let a = rhs_p.as_ptr() as *const f64;
let b = lhs_p.as_ptr() as *const f64;
let c = dst_p.as_mut_ptr() as *mut f64;
let a = std::slice::from_raw_parts(a, a_skip);
let b = std::slice::from_raw_parts(b, b_skip);
let c = std::slice::from_raw_parts_mut(c, c_skip);
crate::accelerate::dgemm(
transa, transb, /* m= */ n as i32, /* n= */ m as i32,
/* k= */ k as i32, /* alpha= */ 1., /* a= */ a,
/* lda= */ lda, /* b= */ b, /* ldb= */ ldb,
/* beta= */ 0., /* c= */ c, /* ldc= */ n as i32,
)
}
}
}
dtype => Err(Error::UnsupportedDTypeForOp(dtype, "matmul").bt())?,
}
Ok(dst)
}
#[cfg(feature = "mkl")]
fn f<T: 'static + WithDType + num_traits::Num + Copy>(
&self,
lhs: &[T],
lhs_l: &Layout,
rhs: &[T],
rhs_l: &Layout,
) -> Result<Vec<T>> {
let (b, m, n, k) = self.0;
let lhs = &lhs[lhs_l.start_offset()..];
let rhs = &rhs[rhs_l.start_offset()..];
let lhs_stride = lhs_l.stride();
let rhs_stride = rhs_l.stride();
let rank = lhs_stride.len();
let a_skip: usize = match lhs_stride[..rank - 2] {
[s1, stride] if s1 == stride * lhs_l.dims()[1] => stride,
[stride] => stride,
[] => m * k,
_ => Err(self.striding_error(lhs_l, rhs_l, "non-contiguous lhs"))?,
};
let b_skip: usize = match rhs_stride[..rank - 2] {
[s1, stride] if s1 == stride * rhs_l.dims()[1] => stride,
[stride] => stride,
[] => n * k,
_ => Err(self.striding_error(lhs_l, rhs_l, "non-contiguous rhs"))?,
};
let c_skip: usize = m * n;
let rhs_m1 = rhs_stride[rhs_stride.len() - 1];
let rhs_m2 = rhs_stride[rhs_stride.len() - 2];
let lhs_m1 = lhs_stride[lhs_stride.len() - 1];
let lhs_m2 = lhs_stride[lhs_stride.len() - 2];
let (lda, transa) = if rhs_m1 == 1 && rhs_m2 == n {
(n as i32, b'N')
} else if rhs_m1 == k && rhs_m2 == 1 {
(k as i32, b'T')
} else {
Err(self.striding_error(lhs_l, rhs_l, "non-contiguous rhs"))?
};
// The b tensor has dims batching, m, k (lhs)
let (ldb, transb) = if lhs_m1 == 1 && lhs_m2 == k {
(k as i32, b'N')
} else if lhs_m1 == m && lhs_m2 == 1 {
(m as i32, b'T')
} else {
Err(self.striding_error(lhs_l, rhs_l, "non-contiguous lhs"))?
};
let mut dst = vec![T::zero(); b * m * n];
match T::DTYPE {
DType::F16 => {
for step in 0..b {
let lhs_p = &lhs[step * a_skip..];
let rhs_p = &rhs[step * b_skip..];
let dst_p = &mut dst[step * c_skip..];
unsafe {
let a = rhs_p.as_ptr() as *const f16;
let b = lhs_p.as_ptr() as *const f16;
let c = dst_p.as_mut_ptr() as *mut f16;
let a = std::slice::from_raw_parts(a, a_skip);
let b = std::slice::from_raw_parts(b, b_skip);
let c = std::slice::from_raw_parts_mut(c, c_skip);
crate::mkl::hgemm(
transa,
transb,
/* m= */ n as i32,
/* n= */ m as i32,
/* k= */ k as i32,
/* alpha= */ f16::ONE,
/* a= */ a,
/* lda= */ lda,
/* b= */ b,
/* ldb= */ ldb,
/* beta= */ f16::ZERO,
/* c= */ c,
/* ldc= */ n as i32,
)
}
}
}
DType::F32 => {
for step in 0..b {
let lhs_p = &lhs[step * a_skip..];
let rhs_p = &rhs[step * b_skip..];
let dst_p = &mut dst[step * c_skip..];
unsafe {
let a = rhs_p.as_ptr() as *const f32;
let b = lhs_p.as_ptr() as *const f32;
let c = dst_p.as_mut_ptr() as *mut f32;
let a = std::slice::from_raw_parts(a, a_skip);
let b = std::slice::from_raw_parts(b, b_skip);
let c = std::slice::from_raw_parts_mut(c, c_skip);
crate::mkl::sgemm(
transa, transb, /* m= */ n as i32, /* n= */ m as i32,
/* k= */ k as i32, /* alpha= */ 1., /* a= */ a,
/* lda= */ lda, /* b= */ b, /* ldb= */ ldb,
/* beta= */ 0., /* c= */ c, /* ldc= */ n as i32,
)
}
}
}
DType::F64 => {
for step in 0..b {
let lhs_p = &lhs[step * a_skip..];
let rhs_p = &rhs[step * b_skip..];
let dst_p = &mut dst[step * c_skip..];
unsafe {
let a = rhs_p.as_ptr() as *const f64;
let b = lhs_p.as_ptr() as *const f64;
let c = dst_p.as_mut_ptr() as *mut f64;
let a = std::slice::from_raw_parts(a, a_skip);
let b = std::slice::from_raw_parts(b, b_skip);
let c = std::slice::from_raw_parts_mut(c, c_skip);
crate::mkl::dgemm(
transa, transb, /* m= */ n as i32, /* n= */ m as i32,
/* k= */ k as i32, /* alpha= */ 1., /* a= */ a,
/* lda= */ lda, /* b= */ b, /* ldb= */ ldb,
/* beta= */ 0., /* c= */ c, /* ldc= */ n as i32,
)
}
}
}
dtype => Err(Error::UnsupportedDTypeForOp(dtype, "matmul").bt())?,
}
Ok(dst)
}
}
fn elu<T: num_traits::Float>(v: T, alpha: T) -> T {
if v.is_sign_positive() {
v
} else {
(v.exp() - T::one()) * alpha
}
}
impl CpuStorage {
pub fn as_slice<D: WithDType>(&self) -> Result<&[D]> {
D::cpu_storage_as_slice(self)
}
pub fn concat(storages: &[CpuStorage]) -> Result<CpuStorage> {
let storage0 = &storages[0];
let s = match storage0 {
Self::U8(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::U8(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::U8(storages)
}
Self::U32(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::U32(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::U32(storages)
}
Self::I64(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::I64(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::I64(storages)
}
Self::BF16(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::BF16(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::BF16(storages)
}
Self::F16(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::F16(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::F16(storages)
}
Self::F32(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::F32(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::F32(storages)
}
Self::F64(_) => {
let storages = storages
.iter()
.map(|s| match s {
Self::F64(s) => Ok(s.as_slice()),
_ => crate::bail!("dtype mismatch"),
})
.collect::<Result<Vec<_>>>()?
.concat();
Self::F64(storages)
}
};
Ok(s)
}
}
impl BackendStorage for CpuStorage {
type Device = CpuDevice;
fn dtype(&self) -> DType {
match self {
Self::U8(_) => DType::U8,
Self::U32(_) => DType::U32,
Self::I64(_) => DType::I64,
Self::BF16(_) => DType::BF16,
Self::F16(_) => DType::F16,
Self::F32(_) => DType::F32,
Self::F64(_) => DType::F64,
}
}
fn to_dtype(&self, layout: &Layout, dtype: DType) -> Result<Self> {
// TODO: find a way around the quadratic number of cases below.
match (self, dtype) {
(Self::U8(storage), DType::BF16) => {
let data = unary_map(storage, layout, |v| bf16::from_f32(v as f32));
Ok(Self::BF16(data))
}
(Self::U32(storage), DType::BF16) => {
let data = unary_map(storage, layout, |v| bf16::from_f32(v as f32));
Ok(Self::BF16(data))
}
(Self::I64(storage), DType::BF16) => {
let data = unary_map(storage, layout, |v| bf16::from_f32(v as f32));
Ok(Self::BF16(data))
}
(Self::BF16(storage), DType::BF16) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::BF16(data))
}
(Self::F16(storage), DType::BF16) => {
let data = unary_map(storage, layout, |v| bf16::from_f32(v.to_f32()));
Ok(Self::BF16(data))
}
(Self::F32(storage), DType::BF16) => {
let data = unary_map(storage, layout, bf16::from_f32);
Ok(Self::BF16(data))
}
(Self::F64(storage), DType::BF16) => {
let data = unary_map(storage, layout, bf16::from_f64);
Ok(Self::BF16(data))
}
(Self::U8(storage), DType::F16) => {
let data = unary_map(storage, layout, |v| f16::from_f32(v as f32));
Ok(Self::F16(data))
}
(Self::U32(storage), DType::F16) => {
let data = unary_map(storage, layout, |v| f16::from_f32(v as f32));
Ok(Self::F16(data))
}
(Self::I64(storage), DType::F16) => {
let data = unary_map(storage, layout, |v| f16::from_f32(v as f32));
Ok(Self::F16(data))
}
(Self::BF16(storage), DType::F16) => {
let data = unary_map(storage, layout, |v| f16::from_f32(v.to_f32()));
Ok(Self::F16(data))
}
(Self::F16(storage), DType::F16) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::F16(data))
}
(Self::F32(storage), DType::F16) => {
let data = unary_map(storage, layout, f16::from_f32);
Ok(Self::F16(data))
}
(Self::F64(storage), DType::F16) => {
let data = unary_map(storage, layout, f16::from_f64);
Ok(Self::F16(data))
}
(Self::U8(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v as f32);
Ok(Self::F32(data))
}
(Self::U32(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v as f32);
Ok(Self::F32(data))
}
(Self::I64(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v as f32);
Ok(Self::F32(data))
}
(Self::BF16(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v.to_f32());
Ok(Self::F32(data))
}
(Self::F16(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v.to_f32());
Ok(Self::F32(data))
}
(Self::F32(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::F32(data))
}
(Self::F64(storage), DType::F32) => {
let data = unary_map(storage, layout, |v| v as f32);
Ok(Self::F32(data))
}
(Self::U8(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::U8(data))
}
(Self::BF16(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v.to_f32() as u8);
Ok(Self::U8(data))
}
(Self::F16(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v.to_f32() as u8);
Ok(Self::U8(data))
}
(Self::F32(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v as u8);
Ok(Self::U8(data))
}
(Self::F64(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v as u8);
Ok(Self::U8(data))
}
(Self::U32(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v as u8);
Ok(Self::U8(data))
}
(Self::I64(storage), DType::U8) => {
let data = unary_map(storage, layout, |v| v as u8);
Ok(Self::U8(data))
}
(Self::U8(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v as u32);
Ok(Self::U32(data))
}
(Self::U32(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::U32(data))
}
(Self::I64(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v as u32);
Ok(Self::U32(data))
}
(Self::BF16(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v.to_f32() as u32);
Ok(Self::U32(data))
}
(Self::F16(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v.to_f32() as u32);
Ok(Self::U32(data))
}
(Self::F32(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v as u32);
Ok(Self::U32(data))
}
(Self::F64(storage), DType::U32) => {
let data = unary_map(storage, layout, |v| v as u32);
Ok(Self::U32(data))
}
(Self::U8(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v as i64);
Ok(Self::I64(data))
}
(Self::U32(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v as i64);
Ok(Self::I64(data))
}
(Self::I64(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::I64(data))
}
(Self::BF16(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v.to_f32() as i64);
Ok(Self::I64(data))
}
(Self::F16(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v.to_f32() as i64);
Ok(Self::I64(data))
}
(Self::F32(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v as i64);
Ok(Self::I64(data))
}
(Self::F64(storage), DType::I64) => {
let data = unary_map(storage, layout, |v| v as i64);
Ok(Self::I64(data))
}
(Self::U8(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v as f64);
Ok(Self::F64(data))
}
(Self::U32(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v as f64);
Ok(Self::F64(data))
}
(Self::I64(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v as f64);
Ok(Self::F64(data))
}
(Self::BF16(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v.to_f64());
Ok(Self::F64(data))
}
(Self::F16(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v.to_f64());
Ok(Self::F64(data))
}
(Self::F32(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v as f64);
Ok(Self::F64(data))
}
(Self::F64(storage), DType::F64) => {
let data = unary_map(storage, layout, |v| v);
Ok(Self::F64(data))
}
}
}
fn reduce_op(&self, op: ReduceOp, layout: &Layout, reduce_dims: &[usize]) -> Result<Self> {
match op {
ReduceOp::Sum => {
let src_dims = layout.dims();
let mut dst_dims = src_dims.to_vec();
for &dim in reduce_dims.iter() {
dst_dims[dim] = 1;
}
let dst_shape = Shape::from(dst_dims);
let mut reduce_dims = reduce_dims.to_vec();
// Sort the reduce_dims as they have to be processed from left to right when converting the
// indexes.
reduce_dims.sort();
let reduce_dims_and_stride: Vec<_> = reduce_dims
.iter()
.map(|&d| (src_dims[d], src_dims[d + 1..].iter().product::<usize>()))
.collect();
ReduceSum {
dst_shape: &dst_shape,
reduce_dims: &reduce_dims,
reduce_dims_and_stride,
}
.map(self, layout)
}
ReduceOp::Min | ReduceOp::ArgMin | ReduceOp::Max | ReduceOp::ArgMax => {
let reduce_dim_index = match reduce_dims {
[reduce_dim_index] => *reduce_dim_index,
_ => {
let op = match op {
ReduceOp::Min => "min",
ReduceOp::ArgMin => "argmin",
ReduceOp::Max => "max",
ReduceOp::ArgMax => "argmax",
_ => unreachable!(),
};
let dims = reduce_dims.to_vec();
Err(Error::OnlySingleDimension { op, dims })?
}
};
let (use_min, return_index) = match op {
ReduceOp::Min => (true, false),
ReduceOp::ArgMin => (true, true),
ReduceOp::Max => (false, false),
ReduceOp::ArgMax => (false, true),
_ => unreachable!(),
};
ReduceIndex {
reduce_dim_index,
use_min,
return_index,
}
.map(self, layout)
}
}
}
fn cmp(&self, op: CmpOp, rhs: &Self, lhs_l: &Layout, rhs_l: &Layout) -> Result<Self> {
Cmp(op).map(self, lhs_l, rhs, rhs_l)
}
fn affine(&self, layout: &Layout, mul: f64, add: f64) -> Result<Self> {
Affine(mul, add).map(self, layout)
}
fn avg_pool2d(
&self,
layout: &Layout,
kernel_size: (usize, usize),
stride: (usize, usize),
) -> Result<Self> {
AvgPool2D(kernel_size, stride).map(self, layout)
}
fn max_pool2d(
&self,
layout: &Layout,
kernel_size: (usize, usize),
stride: (usize, usize),
) -> Result<Self> {
MaxPool2D(kernel_size, stride).map(self, layout)
}
fn upsample_nearest1d(&self, layout: &Layout, sz: usize) -> Result<Self> {
UpsampleNearest1D(sz).map(self, layout)
}
fn upsample_nearest2d(&self, layout: &Layout, h: usize, w: usize) -> Result<Self> {
UpsampleNearest2D(h, w).map(self, layout)
}
fn powf(&self, layout: &Layout, e: f64) -> Result<Self> {
use num_traits::Float;
// TODO: Have some generic map for functions that apply on num_traits::Float elements.
match self {
Self::BF16(storage) => {
let data = unary_map(storage, layout, |v| v.powf(bf16::from_f64(e)));
Ok(Self::BF16(data))
}
Self::F16(storage) => {
let data = unary_map(storage, layout, |v| v.powf(f16::from_f64(e)));
Ok(Self::F16(data))
}
Self::F32(storage) => {
let data = unary_map(storage, layout, |v| v.powf(e as f32));
Ok(Self::F32(data))
}
Self::F64(storage) => {
let data = unary_map(storage, layout, |v| v.powf(e));
Ok(Self::F64(data))
}
Self::U8(_) => Err(Error::UnsupportedDTypeForOp(DType::U8, "elu").bt()),
Self::U32(_) => Err(Error::UnsupportedDTypeForOp(DType::U32, "elu").bt()),
Self::I64(_) => Err(Error::UnsupportedDTypeForOp(DType::I64, "elu").bt()),
}
}
fn elu(&self, layout: &Layout, alpha: f64) -> Result<Self> {
// TODO: Have some generic map for functions that apply on num_traits::Float elements.
match self {
Self::BF16(storage) => {
let data = unary_map(storage, layout, |v| elu(v, bf16::from_f64(alpha)));
Ok(Self::BF16(data))
}
Self::F16(storage) => {
let data = unary_map(storage, layout, |v| elu(v, f16::from_f64(alpha)));
Ok(Self::F16(data))
}
Self::F32(storage) => {
let data = unary_map(storage, layout, |v| elu(v, f32::from_f64(alpha)));
Ok(Self::F32(data))
}
Self::F64(storage) => {
let data = unary_map(storage, layout, |v| elu(v, alpha));
Ok(Self::F64(data))
}
Self::U8(_) => Err(Error::UnsupportedDTypeForOp(DType::U8, "elu").bt()),
Self::U32(_) => Err(Error::UnsupportedDTypeForOp(DType::U32, "elu").bt()),
Self::I64(_) => Err(Error::UnsupportedDTypeForOp(DType::I64, "elu").bt()),
}
}
fn unary_impl<B: UnaryOpT>(&self, layout: &Layout) -> Result<Self> {
match self {
Self::BF16(storage) => {
if B::BF16_VEC {
let data = unary_map_vec(storage, layout, B::bf16, B::bf16_vec);
Ok(Self::BF16(data))
} else {
let data = unary_map(storage, layout, B::bf16);
Ok(Self::BF16(data))
}
}
Self::F16(storage) => {
if B::F16_VEC {
let data = unary_map_vec(storage, layout, B::f16, B::f16_vec);
Ok(Self::F16(data))
} else {
let data = unary_map(storage, layout, B::f16);
Ok(Self::F16(data))
}
}
Self::F32(storage) => {
if B::F32_VEC {
let data = unary_map_vec(storage, layout, B::f32, B::f32_vec);
Ok(Self::F32(data))
} else {
let data = unary_map(storage, layout, B::f32);
Ok(Self::F32(data))
}
}
Self::F64(storage) => {
if B::F64_VEC {
let data = unary_map_vec(storage, layout, B::f64, B::f64_vec);
Ok(Self::F64(data))
} else {
let data = unary_map(storage, layout, B::f64);
Ok(Self::F64(data))
}
}
Self::U8(storage) => {
let data = unary_map(storage, layout, B::u8);
Ok(Self::U8(data))
}
Self::U32(storage) => {
let data = unary_map(storage, layout, B::u32);
Ok(Self::U32(data))
}
Self::I64(storage) => {
let data = unary_map(storage, layout, B::i64);
Ok(Self::I64(data))
}
}
}
fn binary_impl<B: BinaryOpT>(
&self,
rhs: &Self,
lhs_l: &Layout,
rhs_l: &Layout,
) -> Result<Self> {
match (self, rhs) {
(Self::BF16(lhs), Self::BF16(rhs)) => {
let data = if B::BF16_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::bf16, B::bf16_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::bf16)
};
Ok(Self::BF16(data))
}
(Self::F16(lhs), Self::F16(rhs)) => {
let data = if B::F16_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::f16, B::f16_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::f16)
};
Ok(Self::F16(data))
}
(Self::F32(lhs), Self::F32(rhs)) => {
let data = if B::F32_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::f32, B::f32_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::f32)
};
Ok(Self::F32(data))
}
(Self::F64(lhs), Self::F64(rhs)) => {
let data = if B::F64_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::f64, B::f64_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::f64)
};
Ok(Self::F64(data))
}
(Self::U32(lhs), Self::U32(rhs)) => {
let data = if B::U32_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::u32, B::u32_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::u32)
};
Ok(Self::U32(data))
}
(Self::I64(lhs), Self::I64(rhs)) => {
let data = if B::I64_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::i64, B::i64_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::i64)
};
Ok(Self::I64(data))
}
(Self::U8(lhs), Self::U8(rhs)) => {
let data = if B::U8_VEC {
binary_map_vec(lhs_l, rhs_l, lhs, rhs, B::u8, B::u8_vec)
} else {
binary_map(lhs_l, rhs_l, lhs, rhs, B::u8)
};
Ok(Self::U8(data))
}
_ => {
// This should be covered by the dtype check above.
Err(Error::DTypeMismatchBinaryOp {
lhs: self.dtype(),
rhs: rhs.dtype(),
op: B::NAME,
}
.bt())
}
}
}
fn copy_strided_src(&self, dst: &mut Self, dst_offset: usize, src_l: &Layout) -> Result<()> {
match (self, dst) {
(Self::U8(src), Self::U8(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(Self::U32(src), Self::U32(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(Self::I64(src), Self::I64(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(Self::BF16(src), Self::BF16(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(Self::F16(src), Self::F16(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(Self::F32(src), Self::F32(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(Self::F64(src), Self::F64(dst)) => copy_strided_src_(src, dst, dst_offset, src_l),
(_, dst) => {
// This should be covered by the dtype check above.
return Err(Error::DTypeMismatchBinaryOp {
lhs: self.dtype(),
rhs: dst.dtype(),
op: "copy_strided",
}
.bt());
}
}
Ok(())
}
fn where_cond(
&self,
layout: &Layout,
t: &Self,
t_l: &Layout,
f: &Self,
f_l: &Layout,
) -> Result<Self> {
match self {
Self::U8(pred) => WCond(pred, layout).map(t, t_l, f, f_l),
Self::U32(pred) => WCond(pred, layout).map(t, t_l, f, f_l),
Self::I64(pred) => WCond(pred, layout).map(t, t_l, f, f_l),
_ => Err(Error::UnsupportedDTypeForOp(self.dtype(), "where-cond")),
}
}
fn conv1d(
&self,
l: &Layout,
kernel: &Self,
kernel_l: &Layout,
params: &crate::conv::ParamsConv1D,
) -> Result<Self> {
if !USE_IM2COL_CONV1D {
return Conv1D(params).map(self, l, kernel, kernel_l);
}
let op = Im2Col1D {
l_k: params.k_size,
padding: params.padding,
stride: params.stride,
dilation: params.dilation,
};
let col = op.map(self, l)?;
let b = params.b_size;
let n = params.c_out;
let l_out = params.l_out();
let k = op.l_k * params.c_in;
let m = l_out;
let col_l = Layout::contiguous((b, m, k));
let res = if kernel_l.is_contiguous() {
let kernel_l = Layout::contiguous_with_offset((1, n, k), kernel_l.start_offset())
.transpose(1, 2)?
.broadcast_as((b, k, n))?;
col.matmul(kernel, (b, m, n, k), &col_l, &kernel_l)?
} else {
// Make the kernel contiguous if not already the case.
let mut kernel_c = self.device().zeros_impl(kernel_l.shape(), kernel.dtype())?;
kernel.copy_strided_src(&mut kernel_c, 0, kernel_l)?;
let kernel_l = Layout::contiguous_with_offset((1, n, k), kernel_l.start_offset())
.transpose(1, 2)?
.broadcast_as((b, k, n))?;
col.matmul(kernel, (b, m, n, k), &col_l, &kernel_l)?
};
let res_l = Layout::contiguous((b, l_out, params.c_out)).transpose(1, 2)?;
let mut res_t = self.device().zeros_impl(res_l.shape(), res.dtype())?;
res.copy_strided_src(&mut res_t, 0, &res_l)?;
Ok(res_t)
}
fn conv_transpose1d(
&self,
l: &Layout,
kernel: &Self,
kernel_l: &Layout,
params: &crate::conv::ParamsConvTranspose1D,
) -> Result<Self> {
ConvTranspose1D(params).map(self, l, kernel, kernel_l)
}
fn conv2d(
&self,
l: &Layout,
kernel: &Self,
kernel_l: &Layout,
params: &crate::conv::ParamsConv2D,
) -> Result<Self> {
if !USE_IM2COL_CONV2D {
return Conv2D(params).map(self, l, kernel, kernel_l);
}
let op = Im2Col {
h_k: params.k_h,
w_k: params.k_w,
padding: params.padding,
stride: params.stride,
dilation: params.dilation,
};
let col = op.map(self, l)?;
let b = params.b_size;
let n = params.c_out;
let (h_out, w_out) = (params.out_h(), params.out_w());
let k = op.h_k * op.w_k * params.c_in;
let m = h_out * w_out;
let col_l = Layout::contiguous((b, m, k));
let res = if kernel_l.is_contiguous() {
let kernel_l = Layout::contiguous_with_offset((1, n, k), kernel_l.start_offset())
.transpose(1, 2)?
.broadcast_as((b, k, n))?;
col.matmul(kernel, (b, m, n, k), &col_l, &kernel_l)?
} else {
// Make the kernel contiguous if not already the case.
let mut kernel_c = self.device().zeros_impl(kernel_l.shape(), kernel.dtype())?;
kernel.copy_strided_src(&mut kernel_c, 0, kernel_l)?;
let kernel_l = Layout::contiguous_with_offset((1, n, k), kernel_l.start_offset())
.transpose(1, 2)?
.broadcast_as((b, k, n))?;
col.matmul(kernel, (b, m, n, k), &col_l, &kernel_l)?
};
let res_l = Layout::contiguous((b, h_out, w_out, params.c_out))
.transpose(1, 2)?
.transpose(1, 3)?;
let mut res_t = self.device().zeros_impl(res_l.shape(), res.dtype())?;
res.copy_strided_src(&mut res_t, 0, &res_l)?;
Ok(res_t)
}
fn conv_transpose2d(
&self,
l: &Layout,
kernel: &Self,
kernel_l: &Layout,
params: &crate::conv::ParamsConvTranspose2D,
) -> Result<Self> {
ConvTranspose2D(params).map(self, l, kernel, kernel_l)
}
fn index_select(&self, ids: &Self, l: &Layout, ids_l: &Layout, dim: usize) -> Result<Self> {
match ids {
Self::U8(ids) => IndexSelect { ids, ids_l, dim }.map(self, l),
Self::U32(ids) => IndexSelect { ids, ids_l, dim }.map(self, l),
Self::I64(ids) => IndexSelect { ids, ids_l, dim }.map(self, l),
_ => Err(Error::UnsupportedDTypeForOp(self.dtype(), "index-select")),
}
}
fn gather(&self, l: &Layout, ids: &Self, ids_l: &Layout, dim: usize) -> Result<Self> {
match ids {
Self::U8(ids) => Gather { ids, ids_l, dim }.map(self, l),
Self::U32(ids) => Gather { ids, ids_l, dim }.map(self, l),
Self::I64(ids) => Gather { ids, ids_l, dim }.map(self, l),
_ => Err(Error::UnsupportedDTypeForOp(self.dtype(), "gather")),
}
}
fn scatter_add(
&self,
l: &Layout,
ids: &Self,
ids_l: &Layout,
src: &Self,
src_l: &Layout,
dim: usize,
) -> Result<Self> {
match ids {
Self::U8(ids) => ScatterAdd { ids, ids_l, dim }.map(self, l, src, src_l),
Self::U32(ids) => ScatterAdd { ids, ids_l, dim }.map(self, l, src, src_l),
Self::I64(ids) => ScatterAdd { ids, ids_l, dim }.map(self, l, src, src_l),
_ => Err(Error::UnsupportedDTypeForOp(self.dtype(), "scatter-add")),
}
}
fn index_add(
&self,
l: &Layout,
ids: &Self,
ids_l: &Layout,
src: &Self,
src_l: &Layout,
dim: usize,
) -> Result<Self> {
match ids {
Self::U8(ids) => {
let ids = match ids_l.contiguous_offsets() {
Some((a, b)) => &ids[a..b],
None => Err(Error::RequiresContiguous { op: "index-add" }.bt())?,
};
IndexAdd { ids, dim }.map(self, l, src, src_l)
}
Self::U32(ids) => {
let ids = match ids_l.contiguous_offsets() {
Some((a, b)) => &ids[a..b],
None => Err(Error::RequiresContiguous { op: "index-add" }.bt())?,
};
IndexAdd { ids, dim }.map(self, l, src, src_l)
}
Self::I64(ids) => {
let ids = match ids_l.contiguous_offsets() {
Some((a, b)) => &ids[a..b],
None => Err(Error::RequiresContiguous { op: "index-add" }.bt())?,
};
IndexAdd { ids, dim }.map(self, l, src, src_l)
}
_ => Err(Error::UnsupportedDTypeForOp(self.dtype(), "index-add").bt()),
}
}
fn matmul(
&self,
rhs: &Self,
bmnk: (usize, usize, usize, usize),
lhs_l: &Layout,
rhs_l: &Layout,
) -> Result<Self> {
MatMul(bmnk).map(self, lhs_l, rhs, rhs_l)
}
fn device(&self) -> &Self::Device {
&CpuDevice
}
fn try_clone(&self, _: &Layout) -> Result<Self> {
Ok(self.clone())
}
fn to_cpu_storage(&self) -> Result<CpuStorage> {
Ok(self.clone())
}
}
impl BackendDevice for CpuDevice {
type Storage = CpuStorage;
fn location(&self) -> crate::DeviceLocation {
crate::DeviceLocation::Cpu
}
fn same_device(&self, _: &Self) -> bool {
true
}
fn storage_from_cpu_storage(&self, s: &CpuStorage) -> Result<Self::Storage> {
Ok(s.clone())
}
fn new(_: usize) -> Result<Self> {
Ok(Self)
}
fn set_seed(&self, _seed: u64) -> Result<()> {
crate::bail!("cannot seed the CPU rng with set_seed")
}
fn rand_uniform(&self, shape: &Shape, dtype: DType, min: f64, max: f64) -> Result<CpuStorage> {
use rand::prelude::*;
let elem_count = shape.elem_count();
let mut rng = rand::thread_rng();
match dtype {
DType::U8 | DType::U32 | DType::I64 => {
Err(Error::UnsupportedDTypeForOp(dtype, "rand_uniform").bt())
}
DType::BF16 => {
let mut data = Vec::with_capacity(elem_count);
let uniform =
rand::distributions::Uniform::new(bf16::from_f64(min), bf16::from_f64(max));
for _i in 0..elem_count {
data.push(rng.sample::<bf16, _>(uniform))
}
Ok(CpuStorage::BF16(data))
}
DType::F16 => {
let mut data = Vec::with_capacity(elem_count);
let uniform =
rand::distributions::Uniform::new(f16::from_f64(min), f16::from_f64(max));
for _i in 0..elem_count {
data.push(rng.sample::<f16, _>(uniform))
}
Ok(CpuStorage::F16(data))
}
DType::F32 => {
let mut data = Vec::with_capacity(elem_count);
let uniform = rand::distributions::Uniform::new(min as f32, max as f32);
for _i in 0..elem_count {
data.push(rng.sample::<f32, _>(uniform))
}
Ok(CpuStorage::F32(data))
}
DType::F64 => {
let mut data = Vec::with_capacity(elem_count);
let uniform = rand::distributions::Uniform::new(min, max);
for _i in 0..elem_count {
data.push(rng.sample::<f64, _>(uniform))
}
Ok(CpuStorage::F64(data))
}
}
}
fn rand_normal(&self, shape: &Shape, dtype: DType, mean: f64, std: f64) -> Result<CpuStorage> {
use rand::prelude::*;
let elem_count = shape.elem_count();
let mut rng = rand::thread_rng();
match dtype {
DType::U8 | DType::U32 | DType::I64 => {
Err(Error::UnsupportedDTypeForOp(dtype, "rand_normal").bt())
}
DType::BF16 => {
let mut data = Vec::with_capacity(elem_count);
let normal = rand_distr::Normal::new(bf16::from_f64(mean), bf16::from_f64(std))
.map_err(Error::wrap)?;
for _i in 0..elem_count {
data.push(normal.sample(&mut rng))
}
Ok(CpuStorage::BF16(data))
}
DType::F16 => {
let mut data = Vec::with_capacity(elem_count);
let normal = rand_distr::Normal::new(f16::from_f64(mean), f16::from_f64(std))
.map_err(Error::wrap)?;
for _i in 0..elem_count {
data.push(normal.sample(&mut rng))
}
Ok(CpuStorage::F16(data))
}
DType::F32 => {
let mut data = Vec::with_capacity(elem_count);
let normal =
rand_distr::Normal::new(mean as f32, std as f32).map_err(Error::wrap)?;
for _i in 0..elem_count {
data.push(normal.sample(&mut rng))
}
Ok(CpuStorage::F32(data))
}
DType::F64 => {
let mut data = Vec::with_capacity(elem_count);
let normal = rand_distr::Normal::new(mean, std).map_err(Error::wrap)?;
for _i in 0..elem_count {
data.push(normal.sample(&mut rng))
}
Ok(CpuStorage::F64(data))
}
}
}
fn ones_impl(&self, shape: &Shape, dtype: DType) -> Result<CpuStorage> {
let elem_count = shape.elem_count();
let storage = match dtype {
DType::U8 => CpuStorage::U8(vec![1u8; elem_count]),
DType::U32 => CpuStorage::U32(vec![1u32; elem_count]),
DType::I64 => CpuStorage::I64(vec![1i64; elem_count]),
DType::BF16 => CpuStorage::BF16(vec![bf16::ONE; elem_count]),
DType::F16 => CpuStorage::F16(vec![f16::ONE; elem_count]),
DType::F32 => CpuStorage::F32(vec![1f32; elem_count]),
DType::F64 => CpuStorage::F64(vec![1f64; elem_count]),
};
Ok(storage)
}
fn zeros_impl(&self, shape: &Shape, dtype: DType) -> Result<CpuStorage> {
let elem_count = shape.elem_count();
let storage = match dtype {
DType::U8 => CpuStorage::U8(vec![0u8; elem_count]),
DType::U32 => CpuStorage::U32(vec![0u32; elem_count]),
DType::I64 => CpuStorage::I64(vec![0i64; elem_count]),
DType::BF16 => CpuStorage::BF16(vec![bf16::ZERO; elem_count]),
DType::F16 => CpuStorage::F16(vec![f16::ZERO; elem_count]),
DType::F32 => CpuStorage::F32(vec![0f32; elem_count]),
DType::F64 => CpuStorage::F64(vec![0f64; elem_count]),
};
Ok(storage)
}
}
#[macro_export]
macro_rules! map_dtype {
($name:expr, $storage:ident, $fn:expr, ($($dtypes:ident),+)) => {
match $storage {
$(CpuStorage::$dtypes(__e) => CpuStorage::$dtypes($fn(__e)),)*
s => Err(Error::UnsupportedDTypeForOp(s.dtype(), $name).bt())?,
}
};
}