mirror of https://github.com/google/gemma.cpp.git
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
// Copyright 2024 Google LLC
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "util/mat.h"
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "util/threading_context.h"
|
|
#include "hwy/base.h"
|
|
#include "hwy/per_target.h" // VectorBytes
|
|
#include "hwy/profiler.h"
|
|
|
|
namespace gcpp {
|
|
|
|
void CopyMat(const MatPtr& from, MatPtr& to) {
|
|
PROFILER_FUNC;
|
|
HWY_ASSERT_M(from.HasPtr() && to.HasPtr(), to.Name());
|
|
HWY_ASSERT(to.Rows() == from.Rows() && to.Cols() == from.Cols());
|
|
HWY_ASSERT(to.GetType() == from.GetType());
|
|
to.SetScale(from.Scale());
|
|
|
|
if (to.IsPacked() && from.IsPacked()) {
|
|
HWY_ASSERT(to.PackedBytes() == from.PackedBytes());
|
|
hwy::CopyBytes(from.Packed(), to.Packed(), to.PackedBytes());
|
|
return;
|
|
}
|
|
const size_t row_bytes = to.Cols() * to.ElementBytes();
|
|
for (size_t r = 0; r < to.Rows(); ++r) {
|
|
const uint8_t* from_row = from.RowBytes(r);
|
|
uint8_t* to_row = to.RowBytes(r);
|
|
hwy::CopyBytes(from_row, to_row, row_bytes);
|
|
}
|
|
}
|
|
|
|
void ZeroInit(MatPtr& mat) {
|
|
PROFILER_FUNC;
|
|
HWY_ASSERT_M(mat.HasPtr(), mat.Name());
|
|
mat.SetScale(1.0f);
|
|
|
|
if (mat.IsPacked()) {
|
|
hwy::ZeroBytes(mat.Packed(), mat.PackedBytes());
|
|
return;
|
|
}
|
|
// Also zero-initialize padding (required by MatMul).
|
|
hwy::ZeroBytes(mat.RowBytes(0),
|
|
mat.Stride() * mat.ElementBytes() * mat.Rows());
|
|
}
|
|
|
|
size_t Stride(MatPadding padding, size_t cols, size_t element_bytes,
|
|
size_t line_bytes) {
|
|
switch (padding) {
|
|
case MatPadding::kPacked:
|
|
default:
|
|
return cols;
|
|
case MatPadding::kOdd: {
|
|
// Round up to an odd number of cache lines to prevent 4K aliasing and
|
|
// reduce conflict misses (coprime with the cache associativity).
|
|
HWY_DASSERT(line_bytes >= 32);
|
|
HWY_DASSERT(line_bytes % element_bytes == 0);
|
|
const size_t lines = hwy::DivCeil(cols * element_bytes, line_bytes);
|
|
const size_t padded_cols = (lines | 1) * line_bytes / element_bytes;
|
|
HWY_DASSERT(padded_cols >= cols);
|
|
return padded_cols;
|
|
}
|
|
}
|
|
}
|
|
|
|
void MatOwner::AllocateFor(MatPtr& mat, const Allocator& allocator,
|
|
MatPadding padding) {
|
|
const bool is_compressed_and_packed =
|
|
mat.GetType() == Type::kNUQ || mat.GetType() == Type::kI8;
|
|
if (is_compressed_and_packed) padding = MatPadding::kPacked;
|
|
const size_t stride =
|
|
Stride(padding, mat.Cols(), mat.ElementBytes(), allocator.LineBytes());
|
|
const size_t num =
|
|
is_compressed_and_packed ? mat.PackedBytes() : mat.Rows() * stride;
|
|
// `compress-inl` requires up to 2 BF16 vectors of padding. `MatPadding`
|
|
// might not be enough, hence add extra. `MatT` is at least one byte, which
|
|
// is half of BF16, hence adding `VectorBytes` *elements* is enough.
|
|
const size_t bytes = (num + hwy::VectorBytes()) * mat.ElementBytes();
|
|
// Allow binding the entire matrix.
|
|
const size_t padded_bytes =
|
|
hwy::RoundUpTo(bytes, allocator.QuantumBytes() / mat.ElementBytes());
|
|
storage_ = allocator.AllocBytes(padded_bytes);
|
|
mat.SetPtr(storage_.get(), stride);
|
|
}
|
|
|
|
} // namespace gcpp
|