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// Copyright (c) Microsoft Corporation.
// SPDX-License-Identifier: Apache-2.0
// DeepSpeed Team
#pragma once
#include <cuda.h>
#include <cuda_fp16.h>
#include <stdio.h>
#include "custom_cuda_layers.h"
#include <fstream>
using namespace std;
template <typename T>
class Softmax {
public:
struct Config {
size_t batchSize;
size_t heads;
size_t seq_length;
size_t prob_depth;
float temperature;
bool mem_alloc;
Config(size_t batch, size_t h, size_t seq, int prob_size = 0, bool mem_alloc = false)
: batchSize(batch),
heads(h),
seq_length(seq),
prob_depth(prob_size),
temperature(1.0),
mem_alloc(mem_alloc)
{
}
};
Softmax(Config config) : config_(config) {}
~Softmax() {}
void Forward(int bsz, T* vals, const T* attn_mask, cudaStream_t& stream)
{
launch_attn_softmax<T>(vals, attn_mask, bsz, config_.heads, config_.seq_length, stream);
}
void Backward(int bsz, T* out_grad, const T* soft_out, cudaStream_t stream)
{
launch_attn_softmax_backward_v2<T>(
out_grad, soft_out, bsz, config_.heads, config_.seq_length, stream);
}
inline size_t GetProbDepth() const { return config_.prob_depth; }
inline size_t GetBatchSize() const { return config_.batchSize; }
inline size_t GetNumHeads() const { return config_.heads; }
inline size_t GetSeqLength() const { return config_.seq_length; }
inline void SetSeqLength(size_t seq_len) { config_.seq_length = seq_len; }
private:
Config config_;
};
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