#![allow(
clippy::redundant_pub_crate,
reason = "Keep graph-consumed tile types crate scoped inside the private kernel module."
)]
use super::{
ActivationContract, BF16, MatvecBackend, MatvecScratch, PQ2, PTQ1, RowParallelism, bf16_dot,
dimensions, finite, integer_float, matvec_into, scale,
};
use crate::{Result, invalid, model::Tensor};
#[path = "prefill_dot.rs"]
mod dot;
pub(crate) const MAX_TILE_TOKENS: usize = 32;
pub(crate) const ROW_TASK_SCRATCH_BYTES: usize = 16 * 1024;
#[derive(Default)]
pub(crate) struct ProjectionTile {
backend: MatvecBackend,
preparations: Vec<MatvecScratch>,
row_parallelism: RowParallelism,
pub(crate) packed_projections: u64,
pub(crate) decoded_blocks: u64,
}
impl ProjectionTile {
pub(crate) fn with_backend(backend: MatvecBackend) -> Self {
Self {
backend,
..Self::default()
}
}
#[cfg_attr(
not(feature = "parallel-rows"),
allow(
clippy::missing_const_for_fn,
reason = "The parallel-rows build drops the replaced pool owner; retain one non-const signature across feature sets."
)
)]
pub(crate) fn set_row_parallelism(&mut self, parallelism: RowParallelism) {
self.row_parallelism = parallelism;
}
pub(crate) const fn row_parallelism(&self) -> &RowParallelism {
&self.row_parallelism
}
#[cfg(test)]
pub(crate) fn project(
&mut self,
tensor: &Tensor,
inputs: &[Vec<f32>],
outputs: &mut [Vec<f32>],
pinned: bool,
check: &dyn Fn() -> Result<()>,
) -> Result<()> {
self.project_with_previous(None, tensor, inputs, outputs, pinned, check)
}
#[allow(
clippy::suboptimal_flops,
clippy::too_many_lines,
reason = "Retain the separately rounded source arithmetic and auditable packed block order."
)]
pub(crate) fn project_with_previous(
&mut self,
previous: Option<&Tensor>,
tensor: &Tensor,
inputs: &[Vec<f32>],
outputs: &mut [Vec<f32>],
pinned: bool,
check: &dyn Fn() -> Result<()>,
) -> Result<()> {
for output in outputs.iter_mut() {
output.clear();
}
let result = (|| {
let (columns, rows, block_bytes) = dimensions(tensor)?;
if inputs.is_empty() || inputs.len() > MAX_TILE_TOKENS || outputs.len() != inputs.len()
{
return Err(invalid("invalid bounded projection tile"));
}
let reuse_prepared = matches!(tensor.kind, PQ2 | PTQ1 | BF16)
&& self.preparations.len() >= inputs.len()
&& previous.is_some_and(|prev| {
matches!(prev.kind, PQ2 | PTQ1 | BF16)
&& dimensions(prev).is_ok_and(|(prev_cols, _, _)| {
prev_cols == columns
&& ActivationContract::for_tensor(prev, prev_cols, pinned)
== ActivationContract::for_tensor(tensor, columns, pinned)
})
});
while self.preparations.len() < inputs.len() {
self.preparations.try_reserve_exact(1)?;
self.preparations.push(if pinned {
MatvecScratch::with_pinned_backend(self.backend)
} else {
MatvecScratch::with_backend(self.backend)
});
}
let parallel_prepare = !reuse_prepared && self.row_parallelism.uses_pool(inputs.len());
for ((scratch, input), output) in self
.preparations
.iter_mut()
.zip(inputs)
.zip(outputs.iter_mut())
{
check()?;
scratch.pinned_accumulation = pinned;
if !reuse_prepared && !parallel_prepare {
scratch.prepare_input(tensor, input)?;
}
output.try_reserve_exact(rows)?;
}
if parallel_prepare {
self.row_parallelism.update_chunks(
&mut self.preparations[..inputs.len()],
1,
|base, chunk| {
for (offset, scratch) in chunk.iter_mut().enumerate() {
scratch.prepare_input(tensor, &inputs[base + offset])?;
}
Ok(())
},
)?;
}
if tensor.kind == BF16 {
let backend = self.backend;
let preparations = &self.preparations[..inputs.len()];
let mut unused_blocks = 0_u64;
let dot_bf16_one = |row: &[u8], _: &mut u64| -> Result<[f32; MAX_TILE_TOKENS]> {
let mut sums = [0.0_f32; MAX_TILE_TOKENS];
for (sum, scratch) in sums.iter_mut().zip(preparations) {
*sum = bf16_dot(row, &scratch.activations)?;
}
Ok(sums)
};
return self.row_parallelism.fill_tile_four_rows(
&tensor.data,
block_bytes,
outputs,
&mut unused_blocks,
check,
|rows8, decoded| {
if let Some(res) = dot::dot_bf16_eight_rows::<MAX_TILE_TOKENS>(
rows8,
preparations,
backend,
) {
return res;
}
Ok([
dot_bf16_one(rows8[0], decoded)?,
dot_bf16_one(rows8[1], decoded)?,
dot_bf16_one(rows8[2], decoded)?,
dot_bf16_one(rows8[3], decoded)?,
dot_bf16_one(rows8[4], decoded)?,
dot_bf16_one(rows8[5], decoded)?,
dot_bf16_one(rows8[6], decoded)?,
dot_bf16_one(rows8[7], decoded)?,
])
},
|rows4, decoded| {
if let Some(res) =
dot::dot_bf16_four_rows::<MAX_TILE_TOKENS>(rows4, preparations, backend)
{
return res;
}
Ok([
dot_bf16_one(rows4[0], decoded)?,
dot_bf16_one(rows4[1], decoded)?,
dot_bf16_one(rows4[2], decoded)?,
dot_bf16_one(rows4[3], decoded)?,
])
},
dot_bf16_one,
);
}
if !matches!(tensor.kind, PQ2 | PTQ1) {
for ((input, output), scratch) in inputs
.iter()
.zip(outputs.iter_mut())
.zip(self.preparations.iter_mut())
{
check()?;
scratch.set_row_parallelism(self.row_parallelism.clone());
matvec_into(tensor, input, output, scratch)?;
}
return Ok(());
}
self.packed_projections = self.packed_projections.saturating_add(1);
let backend = self.backend;
let preparations = &self.preparations[..inputs.len()];
let dot_one = |row: &[u8],
decoded_blocks: &mut u64|
-> Result<[f32; MAX_TILE_TOKENS]> {
let mut sums = [0.0_f32; MAX_TILE_TOKENS];
let mut lanes = [[0.0_f32; 4]; MAX_TILE_TOKENS];
let bytes = if tensor.kind == PQ2 { 34 } else { 28 };
for (index, block) in row.chunks_exact(bytes).enumerate() {
let weight_scale = if tensor.kind == PQ2 {
scale(block)?
} else {
scale(&block[26..])?
};
let weights = if tensor.kind == PQ2 {
dot::Block::from_pq2(block[2..34].try_into()?, backend)
} else {
dot::Block::from_ptq1(block.try_into()?, backend)?
};
*decoded_blocks = decoded_blocks.saturating_add(1);
if tensor.kind == PQ2 && columns.is_multiple_of(256) {
let start = (index % 2) * 128;
let (chunks8, rem8) = preparations.as_chunks::<8>();
for (chunk_idx, chunk) in chunks8.iter().enumerate() {
let base = chunk_idx * 8;
let a0 = &chunk[0].q8k[index / 2];
let a1 = &chunk[1].q8k[index / 2];
let a2 = &chunk[2].q8k[index / 2];
let a3 = &chunk[3].q8k[index / 2];
let a4 = &chunk[4].q8k[index / 2];
let a5 = &chunk[5].q8k[index / 2];
let a6 = &chunk[6].q8k[index / 2];
let a7 = &chunk[7].q8k[index / 2];
let dots = weights.dot128_eight([
a0.values[start..start + 128].try_into()?,
a1.values[start..start + 128].try_into()?,
a2.values[start..start + 128].try_into()?,
a3.values[start..start + 128].try_into()?,
a4.values[start..start + 128].try_into()?,
a5.values[start..start + 128].try_into()?,
a6.values[start..start + 128].try_into()?,
a7.values[start..start + 128].try_into()?,
]);
for (offset, (act, dot_int)) in [a0, a1, a2, a3, a4, a5, a6, a7]
.into_iter()
.zip(dots)
.enumerate()
{
let d = weight_scale * act.scale;
let dot = integer_float(dot_int);
let token = base + offset;
sums[token] = if pinned {
d.mul_add(dot, sums[token])
} else {
sums[token] + d * dot
};
}
}
let base4 = chunks8.len() * 8;
let (chunks4, rem) = rem8.as_chunks::<4>();
for (chunk_idx, chunk) in chunks4.iter().enumerate() {
let base = base4 + chunk_idx * 4;
let a0 = &chunk[0].q8k[index / 2];
let a1 = &chunk[1].q8k[index / 2];
let a2 = &chunk[2].q8k[index / 2];
let a3 = &chunk[3].q8k[index / 2];
let dots = weights.dot128_four([
a0.values[start..start + 128].try_into()?,
a1.values[start..start + 128].try_into()?,
a2.values[start..start + 128].try_into()?,
a3.values[start..start + 128].try_into()?,
]);
for (offset, (act, dot_int)) in
[a0, a1, a2, a3].into_iter().zip(dots).enumerate()
{
let d = weight_scale * act.scale;
let dot = integer_float(dot_int);
let token = base + offset;
sums[token] = if pinned {
d.mul_add(dot, sums[token])
} else {
sums[token] + d * dot
};
}
}
let rem_base = base4 + chunks4.len() * 4;
for (offset, scratch) in rem.iter().enumerate() {
let activation = &scratch.q8k[index / 2];
let d = weight_scale * activation.scale;
let dot = integer_float(
weights.dot128(activation.values[start..start + 128].try_into()?),
);
let token = rem_base + offset;
sums[token] = if pinned {
d.mul_add(dot, sums[token])
} else {
sums[token] + d * dot
};
}
} else if tensor.kind == PTQ1 && pinned {
for (token, scratch) in preparations.iter().enumerate() {
let activations = <&[super::Q8Block; 4]>::try_from(
&scratch.q8[index * 4..index * 4 + 4],
)?;
weights.accumulate_lanes128(
weight_scale,
activations,
&mut lanes[token],
);
}
} else {
for (token, scratch) in preparations.iter().enumerate() {
let activations = <&[super::Q8Block; 4]>::try_from(
&scratch.q8[index * 4..index * 4 + 4],
)?;
sums[token] += weight_scale * weights.dot128_q8(activations);
}
}
}
for (sum, lanes) in sums.iter_mut().zip(lanes).take(inputs.len()) {
*sum = finite(if tensor.kind == PTQ1 && pinned {
(lanes[0] + lanes[1]) + (lanes[2] + lanes[3])
} else {
*sum
})?;
}
Ok(sums)
};
self.row_parallelism.fill_tile_four_rows(
&tensor.data,
block_bytes,
outputs,
&mut self.decoded_blocks,
check,
|rows8, decoded_blocks| {
if let Some(res) = dot::dot_eight_rows::<MAX_TILE_TOKENS>(
rows8,
preparations,
tensor.kind,
columns,
pinned,
backend,
decoded_blocks,
) {
return res;
}
Ok([
dot_one(rows8[0], decoded_blocks)?,
dot_one(rows8[1], decoded_blocks)?,
dot_one(rows8[2], decoded_blocks)?,
dot_one(rows8[3], decoded_blocks)?,
dot_one(rows8[4], decoded_blocks)?,
dot_one(rows8[5], decoded_blocks)?,
dot_one(rows8[6], decoded_blocks)?,
dot_one(rows8[7], decoded_blocks)?,
])
},
|rows4, decoded_blocks| {
if let Some(res) = dot::dot_four_rows::<MAX_TILE_TOKENS>(
rows4,
preparations,
tensor.kind,
columns,
pinned,
backend,
decoded_blocks,
) {
return res;
}
Ok([
dot_one(rows4[0], decoded_blocks)?,
dot_one(rows4[1], decoded_blocks)?,
dot_one(rows4[2], decoded_blocks)?,
dot_one(rows4[3], decoded_blocks)?,
])
},
dot_one,
)
})();
if result.is_err() {
for output in outputs {
output.clear();
}
}
result
}
}
#[cfg(test)]
mod tests {
use std::cell::Cell;
use std::sync::Arc;
use super::*;
#[cfg(feature = "parallel-rows")]
#[test]
#[allow(
clippy::too_many_lines,
reason = "Keep exact format/backend/tile parity and malformed-row recovery in one control."
)]
fn tiled_parallel_projection_matches_serial_and_recovers() -> Result<()> {
for workers in [2, 4] {
let parallelism = RowParallelism::new(workers)?;
for (kind, columns) in [(PQ2, 256), (PQ2, 384), (PTQ1, 256)] {
let mut packed = [if kind == PTQ1 { 0x66 } else { 0xe4 }; 34];
packed[..2].copy_from_slice(&0x3555_u16.to_le_bytes());
let block = if kind == PTQ1 {
bonsai_ternary::pack_ptq(&packed)?.to_vec()
} else {
packed.to_vec()
};
let mut tensor = Tensor {
name: "parallel-packed-tile".into(),
dimensions: vec![columns, 7],
kind,
data: Arc::from(block.repeat(columns / 128 * 7)),
};
for count in [8, 16, 32] {
let inputs: Vec<Vec<f32>> = (0..count)
.map(|token| {
(0..columns)
.map(|index| {
[1.5, -128.0, 0.0, -0.0, 63.5, -3.25][(index + token) % 6]
})
.collect()
})
.collect();
for backend in [
MatvecBackend::Scalar,
MatvecBackend::Auto,
MatvecBackend::ExperimentalNeon,
] {
let mut tile = ProjectionTile::with_backend(backend);
tile.set_row_parallelism(parallelism.clone());
for pinned in [false, true] {
let mut actual = vec![vec![f32::NAN]; count];
let previous_blocks = tile.decoded_blocks;
tile.project(&tensor, &inputs, &mut actual, pinned, &|| Ok(()))?;
assert_eq!(
tile.decoded_blocks - previous_blocks,
u64::try_from(columns / 128 * 7)?
);
for (input, output) in inputs.iter().zip(&actual) {
let mut scratch = if pinned {
MatvecScratch::with_pinned_backend(MatvecBackend::Scalar)
} else {
MatvecScratch::with_backend(MatvecBackend::Scalar)
};
let mut expected = Vec::new();
matvec_into(&tensor, input, &mut expected, &mut scratch)?;
assert_eq!(
output
.iter()
.map(|value| value.to_bits())
.collect::<Vec<_>>(),
expected
.iter()
.map(|value| value.to_bits())
.collect::<Vec<_>>()
);
}
let valid = tensor.data.clone();
let mut bad = valid.to_vec();
let offset =
bad.len() - block.len() + if kind == PTQ1 { 26 } else { 0 };
bad[offset..offset + 2].copy_from_slice(&0x7c00_u16.to_le_bytes());
tensor.data = Arc::from(bad);
assert!(
tile.project(&tensor, &inputs, &mut actual, pinned, &|| Ok(()))
.is_err()
);
assert!(actual.iter().all(Vec::is_empty));
tensor.data = valid;
tile.project(&tensor, &inputs, &mut actual, pinned, &|| Ok(()))?;
assert!(actual.iter().all(|output| output.len() == 7));
}
assert_eq!(tile.row_parallelism.workers(), workers);
}
}
}
}
Ok(())
}
#[test]
fn tiled_packed_projection_reuses_blocks_and_preserves_independent_rows() -> Result<()> {
for (kind, columns) in [(142, 256), (142, 384), (143, 256)] {
let mut block = [if kind == 143 { 0x66 } else { 0xe4 }; 34];
block[..2].copy_from_slice(&0x3555_u16.to_le_bytes());
let encoded = if kind == 143 {
bonsai_ternary::pack_ptq(&block)?.to_vec()
} else {
block.to_vec()
};
let tensor = Tensor {
name: "tile-packed-reference".into(),
dimensions: vec![columns, 3],
kind,
data: Arc::from(encoded.repeat(columns / 128 * 3)),
};
for count in [1, 8, 16, 32] {
let inputs: Vec<Vec<f32>> = (0..count)
.map(|token| {
(0..columns)
.map(|index| [1.5, -128.0, 0.0, -0.0, 63.5, -3.25][(index + token) % 6])
.collect()
})
.collect();
for backend in [
MatvecBackend::Scalar,
MatvecBackend::Auto,
MatvecBackend::ExperimentalNeon,
] {
let mut tiled = ProjectionTile::with_backend(backend);
for (pass, pinned) in [false, true, false].into_iter().enumerate() {
let mut actual = vec![vec![f32::NAN]; count];
tiled.project(&tensor, &inputs, &mut actual, pinned, &|| Ok(()))?;
assert_eq!(
tiled.decoded_blocks,
u64::try_from(columns / 128 * 3 * (pass + 1))?
);
assert!(tiled.preparations.iter().all(|scratch| {
scratch.requested_backend() == backend
&& scratch.pinned_accumulation == pinned
&& scratch.pq2_consumption.capacity() == 0
}));
for (input, actual) in inputs.iter().zip(actual) {
let mut scratch = if pinned {
MatvecScratch::with_pinned_backend(MatvecBackend::Scalar)
} else {
MatvecScratch::with_backend(MatvecBackend::Scalar)
};
let mut expected = Vec::new();
matvec_into(&tensor, input, &mut expected, &mut scratch)?;
assert_eq!(
actual.into_iter().map(f32::to_bits).collect::<Vec<_>>(),
expected.into_iter().map(f32::to_bits).collect::<Vec<_>>()
);
}
}
}
}
}
Ok(())
}
#[test]
fn tiled_projection_clears_all_outputs_on_late_rejection() {
let tensor = Tensor {
name: "reject".into(),
dimensions: vec![128, 2],
kind: 142,
data: Arc::from([0_u8; 68]),
};
let mut scratch = ProjectionTile::default();
for count in [0, 8, 33] {
let mut inputs = vec![vec![0.0; 128]; count];
if count == 8 {
inputs[7][127] = f32::NAN;
}
let mut outputs = vec![vec![1.0]; count];
assert!(
scratch
.project(&tensor, &inputs, &mut outputs, true, &|| Ok(()))
.is_err()
);
assert!(outputs.iter().all(Vec::is_empty));
}
}
#[test]
fn tiled_projection_clears_completed_rows_on_cancel_and_bad_scale() -> Result<()> {
for backend in [
MatvecBackend::Scalar,
MatvecBackend::Auto,
MatvecBackend::ExperimentalNeon,
] {
for kind in [PQ2, PTQ1] {
let mut packed = [0x66; 34];
packed[..2].copy_from_slice(&0x3555_u16.to_le_bytes());
let block = if kind == PTQ1 {
bonsai_ternary::pack_ptq(&packed)?.to_vec()
} else {
packed.to_vec()
};
let mut tensor = Tensor {
name: "late-tile-error".into(),
dimensions: vec![256, 2],
kind,
data: Arc::from(block.repeat(4)),
};
let inputs = vec![vec![1.5; 256]; 8];
let mut output = vec![vec![1.0]; 8];
let mut tile = ProjectionTile::with_backend(backend);
let calls = Cell::new(0);
assert!(
tile.project(&tensor, &inputs, &mut output, true, &|| {
calls.set(calls.get() + 1);
if calls.get() == 10 {
Err(invalid("cancel after completed tile row"))
} else {
Ok(())
}
})
.is_err()
);
assert_eq!(tile.decoded_blocks, 2);
assert!(output.iter().all(Vec::is_empty));
tile.project(&tensor, &inputs, &mut output, true, &|| Ok(()))?;
assert!(output.iter().all(|row| row.len() == 2));
let mut bad = tensor.data.to_vec();
let offset = block.len() * 3 + if kind == PTQ1 { 26 } else { 0 };
bad[offset..offset + 2].copy_from_slice(&0x7c00_u16.to_le_bytes());
tensor.data = Arc::from(bad);
assert!(
tile.project(&tensor, &inputs, &mut output, false, &|| Ok(()))
.is_err()
);
assert!(output.iter().all(Vec::is_empty));
}
}
Ok(())
}
#[test]
#[allow(
clippy::too_many_lines,
reason = "Cover 8-row and 4-row PQ2/PTQ1 GEMM groups, remainder rows and mid-group error/cancel recovery together."
)]
fn tiled_four_row_gemm_matches_scalar_and_recovers_mid_group_failure() -> Result<()> {
let rows = 13_usize;
for (kind, columns) in [(PQ2, 256_usize), (PQ2, 384), (PTQ1, 256)] {
let blocks_per_row = columns / 128;
let mut data = Vec::new();
for row in 0..rows {
for blk in 0..blocks_per_row {
let mut raw = [0_u8; 34];
let scale = u16::try_from(0x3400_usize + ((row * 3 + blk) % 16) * 0x10)?;
raw[..2].copy_from_slice(&scale.to_le_bytes());
for (idx, slot) in raw[2..].iter_mut().enumerate() {
*slot = if kind == PTQ1 {
[0x00, 0x55, 0x66, 0x99, 0xaa][(row + blk + idx) % 5]
} else {
u8::try_from((row * 29 + blk * 13 + idx * 7) & 0xff)?
};
}
if kind == PTQ1 {
data.extend_from_slice(&bonsai_ternary::pack_ptq(&raw)?);
} else {
data.extend_from_slice(&raw);
}
}
}
let tensor = Tensor {
name: "tile-four-row-gemm".into(),
dimensions: vec![columns, rows],
kind,
data: Arc::from(data),
};
for count in [1, 4, 8, 16, 32] {
let inputs: Vec<Vec<f32>> = (0..count)
.map(|token| {
(0..columns)
.map(|idx| {
[1.5, -64.0, 0.25, -0.0, 31.75, -3.25, 7.125][(idx + token * 3) % 7]
})
.collect()
})
.collect();
for pinned in [false, true] {
let expected: Vec<Vec<u32>> = inputs
.iter()
.map(|input| {
let mut scratch = if pinned {
MatvecScratch::with_pinned_backend(MatvecBackend::Scalar)
} else {
MatvecScratch::with_backend(MatvecBackend::Scalar)
};
let mut out = Vec::new();
matvec_into(&tensor, input, &mut out, &mut scratch)?;
Ok(out.into_iter().map(f32::to_bits).collect())
})
.collect::<Result<_>>()?;
for backend in [
MatvecBackend::Scalar,
MatvecBackend::Auto,
MatvecBackend::ExperimentalNeon,
] {
let mut tile = ProjectionTile::with_backend(backend);
let mut actual = vec![Vec::new(); count];
tile.project(&tensor, &inputs, &mut actual, pinned, &|| Ok(()))?;
assert_eq!(tile.decoded_blocks, u64::try_from(rows * blocks_per_row)?);
let actual_bits: Vec<Vec<u32>> = actual
.into_iter()
.map(|row| row.into_iter().map(f32::to_bits).collect())
.collect();
assert_eq!(actual_bits, expected);
}
}
}
let inputs = vec![vec![1.25; columns]; 8];
let mut output = vec![vec![1.0]; 8];
let mut tile = ProjectionTile::with_backend(MatvecBackend::ExperimentalNeon);
let calls = Cell::new(0);
assert!(
tile.project(&tensor, &inputs, &mut output, true, &|| {
calls.set(calls.get() + 1);
if calls.get() == 10 {
Err(invalid("cancel inside 8-row group"))
} else {
Ok(())
}
})
.is_err()
);
assert_eq!(tile.decoded_blocks, u64::try_from(blocks_per_row)?);
assert!(output.iter().all(Vec::is_empty));
let block_bytes = if kind == PTQ1 { 28 } else { 34 };
let mut bad = tensor.data.to_vec();
let offset = (2 * blocks_per_row) * block_bytes + if kind == PTQ1 { 26 } else { 0 };
bad[offset..offset + 2].copy_from_slice(&0x7c00_u16.to_le_bytes());
let bad_tensor = Tensor {
data: Arc::from(bad),
..tensor
};
let mut bad_tile = ProjectionTile::with_backend(MatvecBackend::ExperimentalNeon);
assert!(
bad_tile
.project(&bad_tensor, &inputs, &mut output, true, &|| Ok(()))
.is_err()
);
assert_eq!(bad_tile.decoded_blocks, u64::try_from(2 * blocks_per_row)?);
assert!(output.iter().all(Vec::is_empty));
}
Ok(())
}
#[test]
fn tiled_bf16_gemm_matches_scalar_and_reuses_prepared_activations() -> Result<()> {
let columns = 20_usize;
let rows = 13_usize;
let mut data = Vec::with_capacity(columns * rows * 2);
for row in 0..rows {
for col in 0..columns {
let bits = u16::try_from(0x3c00_usize + ((row * 5 + col * 3) % 64) * 4)?;
data.extend_from_slice(&bits.to_le_bytes());
}
}
let tensor = Tensor {
name: "tile-bf16-gemm".into(),
dimensions: vec![columns, rows],
kind: BF16,
data: Arc::from(data),
};
let inputs: Vec<Vec<f32>> = (0..8)
.map(|token| {
(0..columns)
.map(|idx| [1.25, -3.5, 0.0, -0.0, 7.125, -0.375][(idx + token) % 6])
.collect()
})
.collect();
let expected: Vec<Vec<u32>> = inputs
.iter()
.map(|input| {
let mut scratch = MatvecScratch::with_backend(MatvecBackend::Scalar);
let mut out = Vec::new();
matvec_into(&tensor, input, &mut out, &mut scratch)?;
Ok(out.into_iter().map(f32::to_bits).collect())
})
.collect::<Result<_>>()?;
for backend in [
MatvecBackend::Scalar,
MatvecBackend::Auto,
MatvecBackend::ExperimentalNeon,
] {
let mut tile = ProjectionTile::with_backend(backend);
#[cfg(feature = "parallel-rows")]
tile.set_row_parallelism(RowParallelism::new(2)?);
let mut actual = vec![Vec::new(); inputs.len()];
tile.project(&tensor, &inputs, &mut actual, true, &|| Ok(()))?;
assert_eq!(tile.packed_projections, 0);
assert_eq!(tile.decoded_blocks, 0);
let actual_bits: Vec<Vec<u32>> = actual
.iter()
.map(|row| row.iter().copied().map(f32::to_bits).collect())
.collect();
assert_eq!(actual_bits, expected);
let preps_before: Vec<usize> = tile
.preparations
.iter()
.map(MatvecScratch::preparation_count)
.collect();
tile.project_with_previous(
Some(&tensor),
&tensor,
&inputs,
&mut actual,
true,
&|| Ok(()),
)?;
let preps_after: Vec<usize> = tile
.preparations
.iter()
.map(MatvecScratch::preparation_count)
.collect();
assert_eq!(preps_after, preps_before);
}
Ok(())
}
}