kernels.cu

// Copyright (c) Facebook, Inc. and its affiliates.
//
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.

#include "kernels.cuh"
#include "common.cuh"
#include <cuda_fp16.h>
#include <cub/block/block_radix_sort.cuh>
#include <cub/warp/warp_reduce.cuh>
#include <cub/block/block_load.cuh>
#include <cub/block/block_discontinuity.cuh>
#include <cub/block/block_store.cuh>
#include <cub/block/block_reduce.cuh>
#include <cub/cub.cuh>
#include <math_constants.h>
#include <mma.h>


#define HLF_MAX 65504
#define TH 1024
#define NUM 4
#define NUM_BLOCK 4096

__device__ static float nf4_data[16] = {-1.0, -0.6961928009986877, -0.5250730514526367, -0.39491748809814453, -0.28444138169288635, -0.18477343022823334, -0.09105003625154495, 0.0, 0.07958029955625534, 0.16093020141124725, 0.24611230194568634, 0.33791524171829224, 0.44070982933044434, 0.5626170039176941, 0.7229568362236023, 1.0};

// source: https://stackoverflow.com/questions/17399119/how-do-i-use-atomicmax-on-floating-point-values-in-cuda
__device__ float atomicMax(float* address, float val) {
  int* address_as_i = reinterpret_cast<int*>(address);
  int old = *address_as_i, assumed;
  do {
    assumed = old;
    old = atomicCAS(
        reinterpret_cast<int*>(address), assumed,
        __float_as_int(fmaxf(val, __int_as_float(assumed))));
  } while (assumed != old);
  return __int_as_float(old);
}

__device__ float dDequantizeFP4Tree(unsigned char val, float absmax)
{
  float sign = (val & 0b1000) == 8 ? -1.0f : 1.0f;
  if((val & 0b0100) == 4) // 0
    if((val & 0b0010) == 2) //01
      if((val & 0b0001) == 1) // 111
        return 0.25000000f*absmax*sign; // 1111
      else
        return 0.16666667f*absmax*sign; // 1110
    else
      if((val & 0b0001) == 1) // 110
        return 0.50000000f*absmax*sign; // 1101
      else
        return 0.33333333f*absmax*sign; // 1100
  else
    if((val & 0b0010) == 2) //10
      if((val & 0b0001) == 1) // 101
        return 1.00000000f*absmax*sign; // 1011
      else
        return 0.66666667f*absmax*sign; // 1010
    else
      if((val & 0b0001) == 1) // 100
        return 5.208333333e-03f*absmax*sign; // 1001
      else
        return 0.00000000f*absmax*sign; // 1000
}

__device__ unsigned char dQuantizeFP4(float x)
{
  // FP4 with bias of 3
  // first bit is a sign
  // subnormals
  // 0b000 = 0
  // 0b001 = 0.0625
  // 0b110 = 2
  // 0b111 = 3
  // 0b100 = 4
  // 0b101 = 6
  // 0b010 = 8
  // 0b011 = 12


  // we do a binary search
  // the pivots are divided by 12 (the FP4 absmax)
  // since we assume input data is in [-1.0, 1.0]

  // !be careful here, its easy to make a mistake
  // that is difficult to notice if you add an extra
  // zero somewhere!

  int sign = x < 0 ? 0b1000 : 0b0000;
  x = fabsf(x);
  if(x > 0.29166667f)
    if( x > 0.583333f)
      if( x > 0.8333333f)
        return 0b0011+sign;
      else
        return 0b0010+sign;
    else
      if(x > 0.4166667f)
        return 0b101+sign;
      else
        return 0b100+sign;
  else
    if(x > 0.0859375f)
      if(x > 0.20833333f)
        return 0b0111+sign;
      else
        return 0b0110+sign;
    else
      if(x > 0.00260417f)
        return 0b0001+sign;
      else
        return 0b0000+sign;
}

__device__ __forceinline__ float dDequantizeNF4(unsigned char val)
{

  // the values for this tree was generated by test_normal_map_tree
  // in the file tests/test_functional.py
  if((val & 0b1000) == 8)
    if((val & 0b0100) == 4) // 1
      if((val & 0b0010) == 2) // 11
        if((val & 0b0001) == 1) // 111
          return 1.0f;
        else
          return 0.7229568362236023f;
      else
        if((val & 0b0001) == 1) // 110
          return 0.5626170039176941f;
        else
          return 0.44070982933044434f;
    else
      if((val & 0b0010) == 2) //10
        if((val & 0b0001) == 1) // 101
          return 0.33791524171829224f;
        else
          return 0.24611230194568634f;
      else
        if((val & 0b0001) == 1) // 100
          return 0.16093020141124725f;
        else
          return 0.07958029955625534f;

  else
    if((val & 0b0100) == 4) // 0
      if((val & 0b0010) == 2) //01
        if((val & 0b0001) == 1) // 011
          return 0.0f;
        else
          return -0.09105003625154495f;
      else
        if((val & 0b0001) == 1) // 010
          return -0.18477343022823334f;
        else
          return -0.28444138169288635f;
    else
      if((val & 0b0010) == 2) //00
        if((val & 0b0001) == 1) // 001
          return -0.39491748809814453f;
        else
          return -0.5250730514526367f;
      else
        if((val & 0b0001) == 1) // 000
          return -0.6961928009986877f;
        else
          return -1.0f;

}

__device__ unsigned char dQuantizeNF4(float x)
{

  // the values for this tree was generated by test_normal_map_tree
  // in the file tests/test_functional.py
  if(x > 0.03979014977812767f)
    if(x > 0.3893125355243683f) // 1
      if(x > 0.6427869200706482f) // 11
        if(x > 0.8614784181118011f) // 111
          return 0b1111;
        else
          return 0b1110;
      else
        if(x > 0.5016634166240692f) // 110
          return 0b1101;
        else
          return 0b1100;
    else
      if(x > 0.2035212516784668f) // 10
        if(x > 0.2920137718319893f) // 101
          return 0b1011;
        else
          return 0b1010;
      else
        if(x > 0.1202552504837513f) // 100
          return 0b1001;
        else
          return 0b1000;
  else
    if(x > -0.33967943489551544f) // 0
      if(x > -0.13791173323988914f) // 01
        if(x > -0.045525018125772476f) // 011
          return 0b0111;
        else
          return 0b0110;
      else
        if(x > -0.23460740596055984f) // 010
          return 0b0101;
        else
          return 0b0100;
    else
      if(x > -0.6106329262256622f) // 00
        if(x > -0.4599952697753906f) // 001
          return 0b0011;
        else
          return 0b0010;
      else
        if(x > -0.8480964004993439f) // 000
          return 0b0001;
        else
          return 0b0000;
}
// sign function for lion
// taken from https://stackoverflow.com/a/4609795, but not sure if there's a proper way to do this in CUDA

template <typename T> __device__ int sgn(T val)
{
  return (T(0) < val) - (val < T(0));
}

template <int STOCHASTIC>
__device__ unsigned char dQuantize(float* smem_code, const float rand, float x)
{
    int pivot = 127;
    int upper_pivot = 255;
    int lower_pivot = 0;

    float lower = -1.0f;
    float upper = 1.0f;

    float val = smem_code[pivot];
    // i>>=1 = {32, 16, 8, 4, 2, 1}
    for(int i = 64; i > 0; i>>=1)
    {
        if(x > val)
        {
            lower_pivot = pivot;
            lower = val;
            pivot+=i;
        }
        else
        {
            upper_pivot = pivot;
            upper = val;
            pivot-=i;
        }
        val = smem_code[pivot];
    }

    if(upper_pivot == 255)
        upper = smem_code[upper_pivot];
    if(lower_pivot == 0)
        lower = smem_code[lower_pivot];

    if(!STOCHASTIC)
    {
      if(x > val)
      {
        float midpoint = (upper+val)*0.5f;
        if(x > midpoint)
        {
          return upper_pivot;
        }
        else
          return pivot;
      }
      else
      {
        float midpoint = (lower+val)*0.5f;
        if(x < midpoint)
          return lower_pivot;
        else
          return pivot;
      }
    }
    else
    {
      if(x > val)
      {
        float dist_to_upper = fabsf(upper-x);
        float dist_full = upper-val;
        if(rand >= dist_to_upper/dist_full) return upper_pivot;
        else return pivot;
      }
      else
      {
        float dist_to_lower = fabsf(lower-x);
        float dist_full = val-lower;
        if(rand >= dist_to_lower/dist_full) return lower_pivot;
        else return pivot;
      }
    }
}

template <int SIGNED>
__device__ __forceinline__ unsigned char quantize_2D(float *__restrict__ quadrants, float *__restrict__ const smem_code, float x)
{
    int pivot = 127;
    int upper_pivot = 255;
    int lower_pivot = 0;

    float lower = SIGNED ? -1.0f : 0.0f;
    float upper = 1.0f;
    float midpoint;
    float val = quadrants[1];
    int local_pivot = 1;
    int offset = 1;

    // i>>=1 = {32, 16, 8, 4, 2, 1}
    for(int i = 64; i > 0; i>>=1)
    {
        if(x > val)
        {
            lower_pivot = pivot;
            lower = val;
            pivot+=i;
            //val = i == 64 ? quadrants[2] : smem_code[pivot];
            local_pivot += offset;
        }
        else
        {
            upper_pivot = pivot;
            upper = val;
            pivot-=i;
            //val = i == 64 ? quadrants[0] : smem_code[pivot];
            local_pivot -= offset;
        }
        val = i >= 64 ? quadrants[local_pivot] : smem_code[pivot];
        offset -= 1;
    }

    if(x > val)
    {
      midpoint = (upper+val)*0.5f;
      if(x > midpoint)
        return upper_pivot;
      else
        return pivot;
    }
    else
    {
      midpoint = (lower+val)*0.5f;
      if(x < midpoint)
        return lower_pivot;
      else
        return pivot;
    }
}

__launch_bounds__(TH, 4)
__global__ void kQuantize(float * code, float * __restrict__ const A, unsigned char *out, const int n)
{
  const int n_full = (NUM_BLOCK*(n/NUM_BLOCK)) + (n % NUM_BLOCK == 0 ? 0 : NUM_BLOCK);
  int valid_items = (blockIdx.x+1 == gridDim.x) ? n - (blockIdx.x*NUM_BLOCK) : NUM_BLOCK;
  const int base_idx = (blockIdx.x * NUM_BLOCK);

  float vals[NUM];
  unsigned char qvals[NUM];
  //const int lane_id = threadIdx.x % 2;

  typedef cub::BlockLoad<float, TH, NUM, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadFloat;
  typedef cub::BlockStore<unsigned char, TH, NUM, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreChar;

  __shared__ typename LoadFloat::TempStorage loadf;
  __shared__ typename StoreChar::TempStorage storec;
  __shared__ float smem_code[256];
  //__shared__ float smem_code[2][257];

  if(threadIdx.x < 256)
  {
    smem_code[threadIdx.x] = code[threadIdx.x];
    //smem_code[0][threadIdx.x] = code[threadIdx.x];
    //smem_code[1][threadIdx.x] = smem_code[0][threadIdx.x];
  }


  for (unsigned int i = base_idx; i < n_full; i += gridDim.x*NUM_BLOCK)
  {
      // number of values already processed in blocks +
      // number of values already processed in this block +
      // rand_offset % mod value
      valid_items = n - i > NUM_BLOCK ? NUM_BLOCK : n - i;

      __syncthreads();
      LoadFloat(loadf).Load(&(A[i]), vals, valid_items);


      #pragma unroll 4
      for(int j = 0; j < NUM; j++)
          qvals[j] = dQuantize<0>(smem_code, 0.0f, vals[j]);

      __syncthreads();
      StoreChar(storec).Store(&(out[i]), qvals, valid_items);
  }
}

template<typename T, int BLOCK_SIZE, int NUM_PER_TH, int STOCHASTIC, int DATA_TYPE>
//__launch_bounds__(TH, 4)
__global__ void kQuantizeBlockwise(float * code, T * __restrict__ const A, float *absmax, unsigned char *out, float * __restrict__ const rand, const int rand_offset, const int n)
{
  const int n_full = gridDim.x * BLOCK_SIZE;
  int valid_items = 0;
  const int base_idx = (blockIdx.x * BLOCK_SIZE);

  T vals[NUM_PER_TH];
  float rand_vals[NUM_PER_TH];
  unsigned char qvals[(DATA_TYPE > 0) ? NUM_PER_TH/2 : NUM_PER_TH];
  //float local_abs_max = -FLT_MAX;
  float local_abs_max = 0.0f;
  int local_rand_idx = 0;

  typedef cub::BlockLoad<T, BLOCK_SIZE/NUM_PER_TH, NUM_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
  typedef cub::BlockStore<unsigned char, BLOCK_SIZE/NUM_PER_TH, (DATA_TYPE > 0) ? NUM_PER_TH/2 : NUM_PER_TH, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreChar;
  typedef cub::BlockReduce<float, BLOCK_SIZE/NUM_PER_TH> BlockReduce;
  typedef cub::BlockLoad<float, BLOCK_SIZE/NUM_PER_TH, NUM_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadFloat;

  __shared__ typename LoadT::TempStorage loadt;
  __shared__ typename LoadFloat::TempStorage loadf;
  __shared__ typename StoreChar::TempStorage storec;
  __shared__ typename BlockReduce::TempStorage reduce;
  __shared__ float smem_code[256];
  __shared__ float smem_absmax_value[1];

  if(DATA_TYPE == General8bit)
    for(int i = threadIdx.x; i < 256; i+=blockDim.x)
      smem_code[i] = code[i];

  for (int i = base_idx; i < n_full; i += gridDim.x*BLOCK_SIZE)
  {
    valid_items = n - i > BLOCK_SIZE ? BLOCK_SIZE : n - i;
    local_abs_max = -FLT_MAX;

    __syncthreads();
    LoadT(loadt).Load(&(A[i]), vals, valid_items, (T)0.0f);

    // 1. compute local max
    // 2. broadcast local max
    // 3. normalize inputs and quantize

    #pragma unroll NUM_PER_TH
    for(int j = 0; j < NUM_PER_TH; j++)
       local_abs_max = fmaxf(local_abs_max, fabsf((float)vals[j]));

    local_abs_max = BlockReduce(reduce).Reduce(local_abs_max, cub::Max(), valid_items);

    if (threadIdx.x == 0) {
      smem_absmax_value[0] = 1.0f / local_abs_max;
      absmax[i / BLOCK_SIZE] = local_abs_max;
    }
    __syncthreads();

    local_abs_max = smem_absmax_value[0];

    if(STOCHASTIC)
    {
      local_rand_idx = ((blockIdx.x*NUM_BLOCK) + (threadIdx.x*NUM) + rand_offset) % (1024-4);
      LoadFloat(loadf).Load(&rand[local_rand_idx], rand_vals, BLOCK_SIZE, 0);
    }

    unsigned char packed_4bit = 0;
    switch(DATA_TYPE)
    {
        case General8bit:
            #pragma unroll NUM_PER_TH
            for(int j = 0; j < NUM_PER_TH; j++)
            {
                if(!STOCHASTIC)
                 qvals[j] = dQuantize<0>(smem_code, 0.0f, ((float)vals[j])*local_abs_max);
                else
                 qvals[j] = dQuantize<1>(smem_code, rand_vals[j], ((float)vals[j])*local_abs_max);
            }
            break;
        case FP4:
            #pragma unroll NUM_PER_TH
            for(int j = 0; j < NUM_PER_TH/2; j++)
            {
              packed_4bit |= dQuantizeFP4(((float)vals[2*j])*local_abs_max) << 4;
              packed_4bit |= dQuantizeFP4(((float)vals[2*j+1])*local_abs_max);
              qvals[j] = packed_4bit;
            }
            break;
        case NF4:
            #pragma unroll NUM_PER_TH
            for(int j = 0; j < NUM_PER_TH/2; j++)
            {
              packed_4bit |= dQuantizeNF4(((float)vals[2*j])*local_abs_max) << 4;
              packed_4bit |= dQuantizeNF4(((float)vals[2*j+1])*local_abs_max);
              qvals[j] = packed_4bit;
            }
            break;
    }

    __syncthreads();
    StoreChar(storec).Store(&(out[(DATA_TYPE > 0) ? i/2 : i]), qvals, (DATA_TYPE > 0) ? (valid_items+1)/2 : valid_items);
  }
}

template<typename T, int TILE_SIZE, int THREADS, int NUM_PER_TH, int DATA_TYPE>
__global__ void kDequantizeBlockwise(float *code, unsigned char * A, float * absmax, T *out, const int blocksize, const int n)
{

  const int n_load = (gridDim.x * TILE_SIZE);
  int valid_items_load = 0;
  int valid_items_store = 0;
  const int base_idx = (blockIdx.x * TILE_SIZE);

  T vals[NUM_PER_TH*((DATA_TYPE > 0) ? 2 : 1)];
  unsigned char qvals[NUM_PER_TH];
  float local_abs_max = -FLT_MAX;

  typedef cub::BlockLoad<unsigned char, THREADS, NUM_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadChar;
  typedef cub::BlockStore<T, THREADS, NUM_PER_TH*((DATA_TYPE > 0) ? 2 : 1), cub::BLOCK_STORE_WARP_TRANSPOSE> StoreT;

  __shared__ typename LoadChar::TempStorage loadchar;
  __shared__ typename StoreT::TempStorage storet;

  for (int i = base_idx; i < n_load; i += gridDim.x*TILE_SIZE)
  {
    if (DATA_TYPE > 0)
    {
      valid_items_load = min(TILE_SIZE, (n + 1) / 2 - i);
      valid_items_store = min(TILE_SIZE * 2, n - i * 2);
    }
    else
    {
      valid_items_load = min(TILE_SIZE, n - i);
      valid_items_store = valid_items_load;
    }

    // Since blocksize will always be a power-of-2, we avoid more expensive
    // division by the blocksize and instead use a shift operation.
    // This is equivalent to (i+threadId.x*NUM_PER_TH)/blocksize.
    local_abs_max = __ldg(&absmax[(i+threadIdx.x*NUM_PER_TH) >> (31 - __clz(blocksize))]);

    __syncthreads();
    LoadChar(loadchar).Load(&(A[i]), qvals, valid_items_load, 128);

    switch (DATA_TYPE)
    {
        case General8bit:
          // load code through read-only cache via __ldg
          #pragma unroll NUM_PER_TH
          for(int j = 0; j < NUM_PER_TH; j++)
            vals[j] = __ldg(&code[qvals[j]])*local_abs_max;
          break;
        case FP4:
          #pragma unroll NUM_PER_TH
          for(int j = 0; j < NUM_PER_TH; j++)
          {
            vals[j*2] = dDequantizeFP4Tree(qvals[j] >> 4, local_abs_max);
            vals[j*2 + 1] = dDequantizeFP4Tree(qvals[j] & 0x0F, local_abs_max);
          }
          break;
        case NF4:
          #pragma unroll NUM_PER_TH
          for(int j = 0; j < NUM_PER_TH; j++)
          {
            vals[j*2] = dDequantizeNF4(qvals[j] >> 4)* local_abs_max;
            vals[j*2 + 1] = dDequantizeNF4(qvals[j] & 0x0F)* local_abs_max;
          }
          break;
    }

    __syncthreads();
    StoreT(storet).Store(&(out[(DATA_TYPE > 0) ? i*2 : i]), vals, valid_items_store);
  }
}

__global__ void kDequantize(float *code, unsigned char *A, float *out, const int n)
{
	const unsigned int numThreads = blockDim.x * gridDim.x;
	const int idx = (blockIdx.x * blockDim.x) + threadIdx.x;

	__shared__ float smem_code[256];
	if(threadIdx.x < 256)
	{
		smem_code[threadIdx.x] = code[threadIdx.x];
	}

	__syncthreads();

	for (int i = idx;i < n; i += numThreads)
	{
		out[i] = smem_code[A[i]];
	}
}



template<typename T, int OPTIMIZER, int BLOCK_SIZE, int NUM_VALS>
__launch_bounds__(BLOCK_SIZE/NUM_VALS, 1)
__global__ void kPreconditionOptimizer32bit2State(T* g, T* p,
                float* state1, float* state2, float *unorm,
                const float beta1, const float beta2, const float eps, const float weight_decay,
                const int step, const float lr, const float gnorm_scale, const int n)
{

  const int n_full = (BLOCK_SIZE*(n/BLOCK_SIZE)) + (n % BLOCK_SIZE == 0 ? 0 : BLOCK_SIZE);
  const int base_idx = (blockIdx.x * blockDim.x * NUM_VALS);
  int valid_items = 0;

  T g_vals[NUM_VALS];

  float s1_vals[NUM_VALS];
  float s2_vals[NUM_VALS];

  const float correction1 = 1.0f/(1.0f - powf(beta1, step));
  const float correction2 = 1.0f/(1.0f - powf(beta2, step));

  typedef cub::BlockLoad<T, BLOCK_SIZE/NUM_VALS, NUM_VALS, cub::BLOCK_LOAD_WARP_TRANSPOSE> Load;
  typedef cub::BlockLoad<float, BLOCK_SIZE/NUM_VALS, NUM_VALS, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadFloat;
  typedef cub::BlockReduce<float, BLOCK_SIZE/NUM_VALS> BlockReduce;

  __shared__ union {
      typename Load::TempStorage load;
      typename LoadFloat::TempStorage loadf;
      typename BlockReduce::TempStorage reduce;
  } temp_storage;

  for (unsigned int i = base_idx; i < n_full; i += gridDim.x*BLOCK_SIZE)
  {
      valid_items = n - i >= (BLOCK_SIZE) ? (BLOCK_SIZE) : n - i;

      __syncthreads();
      Load(temp_storage.load).Load(&(g[i]), g_vals, valid_items, 0.0f);
      __syncthreads();
      LoadFloat(temp_storage.loadf).Load(&(state1[i]), s1_vals, valid_items, 0.0f);
      __syncthreads();
      LoadFloat(temp_storage.loadf).Load(&(state2[i]), s2_vals, valid_items, 0.0f);

      # pragma unroll NUM_VALS
      for(unsigned int j = 0; j < NUM_VALS; j++)
        g_vals[j] = gnorm_scale*((float)g_vals[j]);

      # pragma unroll NUM_VALS
      for(unsigned int j = 0; j < NUM_VALS; j++)
      {
          switch(OPTIMIZER)
          {
              case ADAM:
                  s1_vals[j] = s1_vals[j]*beta1 + ((1.0f -beta1)*((float)g_vals[j]));
                  s2_vals[j] = s2_vals[j]*beta2 + ((1.0f -beta2)*(((float)g_vals[j])*((float)g_vals[j])));
                  s1_vals[j] *= correction1;
                  s2_vals[j] *= correction2;
                  s1_vals[j] = s1_vals[j]/(sqrtf(s2_vals[j])+eps); // update
                  s1_vals[j] *= s1_vals[j]; // update l2 norm (update*update)
                  break;
          }
      }

      # pragma unroll NUM_VALS-1
      for(unsigned int j = 1; j < NUM_VALS; j++)
          s1_vals[0] += s1_vals[j];

      __syncthreads();
      s1_vals[0] = BlockReduce(temp_storage.reduce).Sum(s1_vals[0]);

      if(threadIdx.x == 0)
        atomicAdd(&unorm[0], s1_vals[0]);

      __syncwarp();
  }
}



#define NUM_PER_THREAD 4

template<typename T, int OPTIMIZER>
__launch_bounds__(TH, 1)
__global__ void kOptimizer32bit2State(T* g, T* p,
                float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
                const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,
                const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n)
{

  const int n_full = ((TH*NUM_PER_THREAD)*(n/(TH*NUM_PER_THREAD))) + (n % (TH*NUM_PER_THREAD) == 0 ? 0 : (TH*NUM_PER_THREAD));
  const int base_idx = (blockIdx.x * blockDim.x * NUM_PER_THREAD);
  int valid_items = 0;
  float update_scale = 0.0f;
  T g_vals[NUM_PER_THREAD];
  T p_vals[NUM_PER_THREAD];


  float s1_vals[NUM_PER_THREAD];
  float s2_vals[NUM_PER_THREAD];

  // AdEMAMix has an additional state buffer, which we packed
  // into state1. We need thread-local storage here for these.
  // TODO: Mark with [[maybe_unused]] after upgrade to min compiler.
  float s3_vals[NUM_PER_THREAD];


  const float correction1 = 1.0f - powf(beta1, step);
  const float correction2 = sqrtf(1.0f - powf(beta2, step));
  const float step_size = -lr*correction2/correction1;

  if(max_unorm > 0.0f)
  {
    update_scale = max_unorm > 0.0f ? sqrtf(unorm[0]) : 1.0f;
    if(update_scale > max_unorm*param_norm){ update_scale = (max_unorm*param_norm)/update_scale; }
    else{ update_scale = 1.0f; }
  }
  else{ update_scale = 1.0f; }

  typedef cub::BlockLoad<T, TH, NUM_PER_THREAD, cub::BLOCK_LOAD_WARP_TRANSPOSE> Load;
  typedef cub::BlockStore<T, TH, NUM_PER_THREAD, cub::BLOCK_STORE_WARP_TRANSPOSE> Store;

  typedef cub::BlockLoad<float, TH, NUM_PER_THREAD, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadFloat;
  typedef cub::BlockStore<float, TH, NUM_PER_THREAD, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreFloat;

  __shared__ union {
      typename Load::TempStorage load;
      typename Store::TempStorage store;
      typename LoadFloat::TempStorage loadf;
      typename StoreFloat::TempStorage storef;
  } temp_storage;

  for (unsigned int i = base_idx; i < n_full; i += gridDim.x*TH*NUM_PER_THREAD)
  {
      valid_items = n - i >= (TH*NUM_PER_THREAD) ? (TH*NUM_PER_THREAD) : n - i;

      __syncthreads();
      Load(temp_storage.load).Load(&(g[i]), g_vals, valid_items);
      __syncthreads();
      LoadFloat(temp_storage.loadf).Load(&(state1[i]), s1_vals, valid_items);
      __syncthreads();
      LoadFloat(temp_storage.loadf).Load(&(state2[i]), s2_vals, valid_items);
      __syncthreads();
      Load(temp_storage.load).Load(&(p[i]), p_vals, valid_items);

      // Load additional state1 data for AdEMAMix
      // TODO: Make constexpr after updating min compiler
      if (OPTIMIZER == ADEMAMIX) {
        __syncthreads();
        LoadFloat(temp_storage.loadf).Load(&(state1[n + i]), s3_vals, valid_items);
      }

      # pragma unroll 4
      for(unsigned int j = 0; j < NUM_PER_THREAD; j++)
        g_vals[j] = gnorm_scale*((float)g_vals[j]);

      # pragma unroll 4
      for(unsigned int j = 0; j < NUM_PER_THREAD; j++)
      {
          switch(OPTIMIZER)
          {
              case ADEMAMIX:
                // m1 update: m1 = beta1 * m1 + (1-beta1) * g
                s1_vals[j] = (s1_vals[j] * beta1) + ((1.0f - beta1) * (float)g_vals[j]);

                // m2 update: m2 = m2 * beta3 + (1-beta3) * g
                s3_vals[j] = (s3_vals[j] * beta3) + ((1.0f - beta3) * (float)g_vals[j]);

                // nu update: nu = beta2 * nu + (1-beta2) * g^2
                s2_vals[j] = (s2_vals[j] * beta2) + ((1.0f - beta2) * (float)g_vals[j] * (float)g_vals[j]);

                p_vals[j] = (float)p_vals[j] - lr * (
                  ((s1_vals[j] / correction1) + (alpha * s3_vals[j])) / (
                    (sqrtf(s2_vals[j]) / correction2) + eps
                  )
                );

                if (weight_decay > 0.0f)
                    p_vals[j] = ((float)p_vals[j]) * (1.0f - (lr * weight_decay));

              break;
              case ADAM:

									if(!skip_zeros || (skip_zeros && ((float)g_vals[j] != 0.0f)))
									{
										s1_vals[j] = s1_vals[j]*beta1 + ((1.0f -beta1)*((float)g_vals[j]));
										s2_vals[j] = s2_vals[j]*beta2 + ((1.0f -beta2)*(((float)g_vals[j])*((float)g_vals[j])));
										p_vals[j] = ((float)p_vals[j]) + (update_scale*step_size*(s1_vals[j]/(sqrtf(s2_vals[j])+(eps*correction2))));

                    if(weight_decay > 0.0f)
                        p_vals[j] = ((float)p_vals[j])*(1.0f-(lr*weight_decay));
									}
                  break;
          }
      }

      __syncthreads();
      Store(temp_storage.store).Store(&(p[i]), p_vals, valid_items);
      __syncthreads();
      StoreFloat(temp_storage.storef).Store(&(state1[i]), s1_vals, valid_items);
      __syncthreads();
      StoreFloat(temp_storage.storef).Store(&(state2[i]), s2_vals, valid_items);

      if (OPTIMIZER == ADEMAMIX) {
        __syncthreads();
        StoreFloat(temp_storage.storef).Store(&(state1[n + i]), s3_vals, valid_items);
      }
  }
}

template<typename T, int OPTIMIZER, int BLOCK_SIZE, int NUM_VALS>
__launch_bounds__(BLOCK_SIZE/NUM_VALS, 1)
__global__ void kPreconditionOptimizer32bit1State(T* g, T* p,
                float* state1, float *unorm,
                const float beta1, const float beta2, const float eps, const float weight_decay,
                const int step, const float lr, const float gnorm_scale, const int n)
{

  const int n_full = (BLOCK_SIZE*(n/BLOCK_SIZE)) + (n % BLOCK_SIZE == 0 ? 0 : BLOCK_SIZE);
  const int base_idx = (blockIdx.x * blockDim.x * NUM_VALS);
  int valid_items = 0;

  T g_vals[NUM_VALS];

  float s1_vals[NUM_VALS];

  typedef cub::BlockLoad<T, BLOCK_SIZE/NUM_VALS, NUM_VALS, cub::BLOCK_LOAD_WARP_TRANSPOSE> Load;
  typedef cub::BlockLoad<float, BLOCK_SIZE/NUM_VALS, NUM_VALS, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadFloat;
  typedef cub::BlockReduce<float, BLOCK_SIZE/NUM_VALS> BlockReduce;

  __shared__ union {
      typename Load::TempStorage load;
      typename LoadFloat::TempStorage loadf;
      typename BlockReduce::TempStorage reduce;
  } temp_storage;

  for (unsigned int i = base_idx; i < n_full; i += gridDim.x*BLOCK_SIZE)
  {
      valid_items = n - i >= (BLOCK_SIZE) ? (BLOCK_SIZE) : n - i;

      __syncthreads();
      Load(temp_storage.load).Load(&(g[i]), g_vals, valid_items, 0.0f);
      __syncthreads();
      LoadFloat(temp_storage.loadf).Load(&(state1[i]), s1_vals, valid_items, 0.0f);

      # pragma unroll NUM_VALS
      for(unsigned int j = 0; j < NUM_VALS; j++)
        g_vals[j] = gnorm_scale*((float)g_vals[j]);

      # pragma unroll NUM_VALS
      for(unsigned int j = 0; j < NUM_VALS; j++)
      {
          switch(OPTIMIZER)
          {
              case MOMENTUM:
                  if(step == 1)
                    s1_vals[j] = (float)g_vals[j]; // state update
                  else
                    s1_vals[j] = s1_vals[j]*beta1 + ((float)g_vals[j]); // state update
                  s1_vals[j] = s1_vals[j]*s1_vals[j]; // update norm
                  break;
              case LION:
                  s1_vals[j] = s1_vals[j]*beta2 + ((1.0f-beta2)*(float)g_vals[j]); // state update
                  break;
              case RMSPROP:
                  s1_vals[j] = s1_vals[j]*beta1 + ((1.0f-beta1)*((float)g_vals[j])*((float)g_vals[j])); // state update
                  s1_vals[j] = __fdividef((float)g_vals[j],sqrtf(s1_vals[j])+eps); // update value
                  s1_vals[j] = s1_vals[j]*s1_vals[j]; // update norm
                  break;
              case ADAGRAD:
                  s1_vals[j] = s1_vals[j] + ((float)g_vals[j])*((float)g_vals[j]); // state update
                  s1_vals[j] = __fdividef((float)g_vals[j],sqrtf(s1_vals[j])+eps); // update value
                  s1_vals[j] = s1_vals[j]*s1_vals[j]; // update norm
                  break;
          }
      }

      # pragma unroll
      for(unsigned int j = 1; j < NUM_VALS; j++)
        s1_vals[0] += s1_vals[j];

      __syncthreads();
      s1_vals[0] = BlockReduce(temp_storage.reduce).Sum(s1_vals[0], valid_items);

      if(threadIdx.x == 0)
        atomicAdd(&unorm[0], s1_vals[0]);

      __syncwarp();
  }
}

template<typename T, int OPTIMIZER>
__launch_bounds__(TH, 1)
__global__ void kOptimizer32bit1State(T *g, T *p,
                float *state1, float *unorm, const float max_unorm, const float param_norm,
                const float beta1, const float beta2, const float eps, const float weight_decay,
                const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n)
{

  const int n_full = ((TH*NUM_PER_THREAD)*(n/(TH*NUM_PER_THREAD))) + (n % (TH*NUM_PER_THREAD) == 0 ? 0 : (TH*NUM_PER_THREAD));
  const int base_idx = (blockIdx.x * blockDim.x * NUM_PER_THREAD);
  int valid_items = 0;
  float update_scale = 0.0f;

  if(max_unorm > 0.0f)
  {
    update_scale = max_unorm > 0.0f ? sqrtf(unorm[0]) : 1.0f;
    if(update_scale > max_unorm*param_norm+eps){ update_scale = (max_unorm*param_norm+eps)/update_scale; }
    else{ update_scale = 1.0f; }
  }
  else{ update_scale = 1.0f; }

  T g_vals[NUM_PER_THREAD];
  T p_vals[NUM_PER_THREAD];

  float s1_vals[NUM_PER_THREAD];

  typedef cub::BlockLoad<T, TH, NUM_PER_THREAD, cub::BLOCK_LOAD_WARP_TRANSPOSE> Load;
  typedef cub::BlockStore<T, TH, NUM_PER_THREAD, cub::BLOCK_STORE_WARP_TRANSPOSE> Store;

  typedef cub::BlockLoad<float, TH, NUM_PER_THREAD, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadFloat;
  typedef cub::BlockStore<float, TH, NUM_PER_THREAD, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreFloat;

  __shared__ union {
      typename Load::TempStorage load;
      typename Store::TempStorage store;
      typename LoadFloat::TempStorage loadf;
      typename StoreFloat::TempStorage storef;
  } temp_storage;

  for (unsigned int i = base_idx; i < n_full; i += gridDim.x*TH*NUM_PER_THREAD)
  {
      valid_items = n - i >= (TH*NUM_PER_THREAD) ? (TH*NUM_PER_THREAD) : n - i;

      __syncthreads();
      Load(temp_storage.load).Load(&(g[i]), g_vals, valid_items);
      __syncthreads();
      LoadFloat(temp_storage.loadf).Load(&(state1[i]), s1_vals, valid_items);
      __syncthreads();
      Load(temp_storage.load).Load(&(p[i]), p_vals, valid_items);

      # pragma unroll 4
      for(unsigned int j = 0; j < NUM_PER_THREAD; j++)
      {
        g_vals[j] = gnorm_scale*((float)g_vals[j]);
        if(weight_decay > 0.0f)
          g_vals[j] = (float)g_vals[j] + (((float)p_vals[j])*weight_decay);
      }

      # pragma unroll 4
      for(unsigned int j = 0; j < NUM_PER_THREAD; j++)
      {
					if(!skip_zeros || (skip_zeros && ((float)g_vals[j] != 0.0f)))
					{
						switch(OPTIMIZER)
						{
								case MOMENTUM:
										if(step == 1)
											s1_vals[j] = (float)g_vals[j];
										else
											s1_vals[j] = s1_vals[j]*beta1 + ((float)g_vals[j]);

										p_vals[j] = ((float)p_vals[j]) + update_scale*(-lr*(s1_vals[j]));
										break;
								case LION:
										p_vals[j] = ((float)p_vals[j]) - update_scale*(lr*sgn(((float)s1_vals[j])*beta1 + ((1.0f-beta1)*((float)g_vals[j]))));
										s1_vals[j] = s1_vals[j]*beta2 + ((1.0f-beta2)*((float)g_vals[j]));
										break;
								case RMSPROP:
										s1_vals[j] = s1_vals[j]*beta1 + ((1.0f-beta1)*((float)g_vals[j])*((float)g_vals[j]));
										p_vals[j] = ((float)p_vals[j]) - update_scale*(lr*__fdividef((float)g_vals[j],sqrtf((float)s1_vals[j])+eps));
										break;
								case ADAGRAD:
										s1_vals[j] = s1_vals[j] + ((float)g_vals[j])*((float)g_vals[j]);
										p_vals[j] = ((float)p_vals[j]) - lr*__fdividef((float)g_vals[j],sqrtf((float)s1_vals[j])+eps);
										break;
						}
					}
      }

      __syncthreads();
      Store(temp_storage.store).Store(&(p[i]), p_vals, valid_items);
      __syncthreads();
      StoreFloat(temp_storage.storef).Store(&(state1[i]), s1_vals, valid_items);
  }
}


#define NUM8BIT 16
#define NUM_THREADS 256
#define NUM_PER_BLOCK 4096

template<typename T, int OPTIMIZER>
__global__ void
__launch_bounds__(NUM_THREADS, 2)
kPreconditionOptimizerStatic8bit2State(T* p, T* __restrict__ const g, unsigned char*__restrict__  const state1, unsigned char* __restrict__ const state2,
                float *unorm,
                const float beta1, const float beta2,
                const float eps, const int step,
                float* __restrict__ const quantiles1, float* __restrict__ const quantiles2,
                float* max1, float* max2, float* new_max1, float* new_max2,
                const float gnorm_scale, const int n)
{
    const int n_full = gridDim.x * NUM_PER_BLOCK;
    const int base_idx = (blockIdx.x * blockDim.x * NUM_PER_THREAD);
    int valid_items = n - (blockIdx.x*NUM_PER_BLOCK) > NUM_PER_BLOCK ? NUM_PER_BLOCK : n - (blockIdx.x*NUM_PER_BLOCK);
    float g_val = 0.0f;
    float local_max_s1 = -FLT_MAX;
    float local_max_s2 = -FLT_MAX;
    float local_unorm = 0.0f;

    float s2_vals[NUM8BIT];
    float s1_vals[NUM8BIT];
    T g_vals[NUM8BIT];
    unsigned char m_c1[NUM8BIT];
    unsigned char r_c2[NUM8BIT];

    typedef cub::BlockLoad<T, NUM_THREADS, NUM8BIT, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
    typedef cub::BlockLoad<unsigned char, NUM_THREADS, NUM8BIT, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadUInt8;
    typedef cub::BlockReduce<float, NUM_THREADS> BlockReduce;


    __shared__ union {
        typename LoadT::TempStorage loadh;
        typename LoadUInt8::TempStorage loadc;
        typename BlockReduce::TempStorage reduce;
    } temp_storage;

    __shared__ float smem_quantiles1[256];
    __shared__ float smem_quantiles2[256];

    if(threadIdx.x < 256)
    {
        smem_quantiles1[threadIdx.x] = quantiles1[threadIdx.x];
        smem_quantiles2[threadIdx.x] = quantiles2[threadIdx.x];
    }

    __syncthreads();

    for (unsigned int i = base_idx; i < n_full; i += NUM_THREADS*gridDim.x*NUM8BIT)
    {
        valid_items = n - i >= (TH*NUM_PER_THREAD) ? (TH*NUM_PER_THREAD) : n - i;

        LoadT(temp_storage.loadh).Load(&(g[i]), g_vals, valid_items, (T)0.0f);
        __syncthreads();
        LoadUInt8(temp_storage.loadc).Load(&(state1[i]), m_c1, valid_items, 128);
        __syncthreads();
        LoadUInt8(temp_storage.loadc).Load(&(state2[i]), r_c2, valid_items, 128);
        __syncthreads();

        #pragma unroll 16
        for(int j = 0; j < NUM8BIT; j++)
        {
            g_val = g_vals[j];
            g_val *= gnorm_scale;
            s1_vals[j] = smem_quantiles1[m_c1[j]]*max1[0]*beta1;
            s1_vals[j] += (1.0f-beta1)*g_val;
            local_max_s1 = fmaxf(local_max_s1, fabsf(s1_vals[j]));
        }

        #pragma unroll 16
        for(int j = 0; j < NUM8BIT; j++)
        {
            g_val = g_vals[j];
            g_val *= gnorm_scale;
            s2_vals[j] = smem_quantiles2[r_c2[j]]*max2[0]*beta2;
            s2_vals[j] += (1.0f-beta2)*g_val*g_val;
            local_max_s2 = fmaxf(local_max_s2, fabsf(s2_vals[j]));
        }

        if(unorm != NULL)
        {
          #pragma unroll 16
          for(int j = 0; j < NUM8BIT; j++)
          {
            float correction1 = __fdividef(1.0f, 1.0f - powf(beta1, step));
            float correction2 = __fdividef(1.0f, 1.0f - powf(beta2, step));
            s1_vals[j] *= correction1;
            s2_vals[j] *= correction2;
            float update_val = s1_vals[j]/(sqrtf(s2_vals[j])+eps); // update
            local_unorm += update_val*update_val;
          }
        }
    }

    __syncthreads();
    local_max_s1 = BlockReduce(temp_storage.reduce).Reduce(local_max_s1, cub::Max(), valid_items);
    __syncthreads();
    local_max_s2 = BlockReduce(temp_storage.reduce).Reduce(local_max_s2, cub::Max(), valid_items);
    if(unorm != NULL)
    {
      __syncthreads();
      local_unorm = BlockReduce(temp_storage.reduce).Reduce(local_unorm, cub::Sum(), valid_items);
    }

    if(threadIdx.x == 0)
    {
        atomicMax(&new_max1[0], local_max_s1);
        atomicMax(&new_max2[0], local_max_s2);
        if(unorm != NULL){ atomicAdd(&unorm[0], local_unorm); }
    }
}

#define NUM_PER_THREAD2 4
#define NUM_THREADS2 1024
#define NUM_PER_BLOCK2 4096

template<typename T, int OPTIMIZER>
__global__ void
__launch_bounds__(NUM_THREADS2, 1)
kOptimizerStatic8bit2State(T* p, T* const g, unsigned char* state1, unsigned char* state2,
                const float *unorm, const float max_unorm, const float param_norm, \
                const float beta1, const float beta2,
                const float eps, const int step, const float lr,
                float* __restrict__ const quantiles1, float* __restrict__ const quantiles2,
                float* max1, float* max2, float* new_max1, float* new_max2,
                float weight_decay,
                const float gnorm_scale, const int n)
{

    const int n_full = (blockDim.x * gridDim.x)*NUM_PER_THREAD2;
    const int base_idx = (blockIdx.x * blockDim.x * NUM_PER_THREAD2);
    int valid_items = 0;
    float g_val = 0.0f;
    float s1_vals[NUM_PER_THREAD2];
    float s2_vals[NUM_PER_THREAD2];
    const float correction1 = 1.0f - powf(beta1, step);
    const float correction2 = sqrtf(1.0f - powf(beta2, step));
    const float step_size = -lr*correction2/correction1;
    //const float step_size = -lr*correction2/correction1;
    float new_max_val1 = 1.0f/new_max1[0];
    float new_max_val2 = 1.0f/new_max2[0];
    float update_scale = 1.0f;

    if(max_unorm > 0.0f)
    {
      update_scale = max_unorm > 0.0f ? sqrtf(unorm[0]) : 1.0f;
      if(update_scale > max_unorm*param_norm){ update_scale = (max_unorm*param_norm)/update_scale; }
      else{ update_scale = 1.0f; }
    }
    else{ update_scale = 1.0f; }

    unsigned char c1s[NUM_PER_THREAD2];
    unsigned char c2s[NUM_PER_THREAD2];
    T p_vals[NUM_PER_THREAD2];
    T g_vals[NUM_PER_THREAD2];
    typedef cub::BlockLoad<T, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
    typedef cub::BlockLoad<unsigned char, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadChar;

    typedef cub::BlockStore<unsigned char, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreChar;
    typedef cub::BlockStore<T, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreT;

    __shared__ float smem_quantiles1[256];
    __shared__ float smem_quantiles2[256];

    __shared__ union {
        typename LoadT::TempStorage loadh;
        typename LoadChar::TempStorage loadc;
        typename StoreChar::TempStorage storec;
        typename StoreT::TempStorage storeh;
    } temp_storage;

    if(threadIdx.x < 512)
    {
        if(threadIdx.x < 256)
            smem_quantiles1[threadIdx.x] = quantiles1[threadIdx.x];
        else
            smem_quantiles2[threadIdx.x-256] = quantiles2[threadIdx.x-256];
    }

    __syncthreads();

    for (unsigned int i = base_idx; i < n_full; i += gridDim.x*NUM_THREADS2*NUM_PER_THREAD2)
    {
        valid_items = n - i >= (TH*NUM_PER_THREAD) ? (TH*NUM_PER_THREAD) : n - i;
        LoadT(temp_storage.loadh).Load(&(g[i]), g_vals, valid_items, (T)0.0f);
        __syncthreads();
        LoadChar(temp_storage.loadc).Load(&(state1[i]), c1s, valid_items, 128);
        __syncthreads();
        LoadChar(temp_storage.loadc).Load(&(state2[i]), c2s, valid_items, 0);
        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(p[i]), p_vals, valid_items);

        if((i + (threadIdx.x*NUM_PER_THREAD2) + NUM_PER_THREAD2) > n){ continue; }

        # pragma unroll 4
        for(unsigned int j = 0; j < NUM_PER_THREAD2; j++)
        {
            g_val = float(g_vals[j]);
            g_val *= gnorm_scale;
            s1_vals[j] = smem_quantiles1[c1s[j]];
            s1_vals[j] = s1_vals[j]*max1[0];

            s1_vals[j] = (s1_vals[j]*beta1) + (((1.0f-beta1)*g_val));

            c1s[j] = dQuantize<0>(smem_quantiles1, 0.0f, s1_vals[j]*new_max_val1);

            // make sure state1 term has still the same sign after quantization
            // (not needed for state2 term which has only positive values)
            if(signbit(smem_quantiles1[c1s[j]]) != signbit(s1_vals[j]))
            {
              if(s1_vals[j] > 0.0f)
                  c1s[j] += 1;
              else
                  c1s[j] -= 1;
            }

            s2_vals[j] = smem_quantiles2[c2s[j]];
            s2_vals[j] = s2_vals[j]*max2[0];
            s2_vals[j] = (s2_vals[j]*beta2) + (((1.0f-beta2)*g_val*g_val));
            c2s[j] = dQuantize<0>(smem_quantiles2, 0.0f, s2_vals[j]*new_max_val2);
        }

        # pragma unroll 4
        for(unsigned int j = 0; j < NUM_PER_THREAD2; j++)
        {
            p_vals[j] = (T)(((float)p_vals[j]) + ((update_scale*step_size*(s1_vals[j]/(sqrtf(s2_vals[j])+(correction2*eps))))));
            if(weight_decay > 0.0f)
                p_vals[j] = update_scale*((float)p_vals[j])*(1.0f-(lr*weight_decay));
        }

        StoreT(temp_storage.storeh).Store(&(p[i]), p_vals, valid_items);
        __syncthreads();
        StoreChar(temp_storage.storec).Store(&(state1[i]), c1s, valid_items);
        __syncthreads();
        StoreChar(temp_storage.storec).Store(&(state2[i]), c2s, valid_items);
        __syncthreads();
    }
}


template<typename T, int OPTIMIZER>
__global__ void
__launch_bounds__(NUM_THREADS, 2)
kPreconditionOptimizerStatic8bit1State(T* p, T* __restrict__ const g, unsigned char*__restrict__  const state1,
                float *unorm,
                const float beta1, const float beta2,
                const float eps, const int step,
                float* __restrict__ const quantiles1,
                float* max1, float* new_max1,
                const float weight_decay,
                const float gnorm_scale, const int n)
{
    const int n_full = gridDim.x * NUM_PER_BLOCK;
    const int base_idx = (blockIdx.x * blockDim.x * NUM_PER_THREAD);
    int valid_items = n - (blockIdx.x*NUM_PER_BLOCK) > NUM_PER_BLOCK ? NUM_PER_BLOCK : n - (blockIdx.x*NUM_PER_BLOCK);
    float g_val = 0.0f;
    float local_max_s1 = -FLT_MAX;
    float local_unorm = 0.0f;

    float s1_vals[NUM8BIT];
    T g_vals[NUM8BIT];
    unsigned char m_c1[NUM8BIT];

    typedef cub::BlockLoad<T, NUM_THREADS, NUM8BIT, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
    typedef cub::BlockLoad<unsigned char, NUM_THREADS, NUM8BIT, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadUInt8;
    typedef cub::BlockReduce<float, NUM_THREADS> BlockReduce;


    __shared__ union {
        typename LoadT::TempStorage loadh;
        typename LoadUInt8::TempStorage loadc;
        typename BlockReduce::TempStorage reduce;
    } temp_storage;

    __shared__ float smem_quantiles1[256];

    if(threadIdx.x < 256)
      smem_quantiles1[threadIdx.x] = quantiles1[threadIdx.x];

    __syncthreads();

    for (unsigned int i = base_idx; i < n_full; i += gridDim.x*NUM_THREADS*NUM8BIT)
    {
        valid_items = n - i >= (TH*NUM_PER_THREAD) ? (TH*NUM_PER_THREAD) : n - i;

        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(g[i]), g_vals, valid_items, (T)0.0f);
        __syncthreads();
        LoadUInt8(temp_storage.loadc).Load(&(state1[i]), m_c1, valid_items, 128);

        #pragma unroll 16
        for(int j = 0; j < NUM8BIT; j++)
        {
            g_val = g_vals[j];
            g_val *= gnorm_scale;
            s1_vals[j] = smem_quantiles1[m_c1[j]]*max1[0];
            switch(OPTIMIZER)
            {
                case ADAGRAD:
		case MOMENTUM:
                    if(step == 1)
                      s1_vals[j] = (float)g_vals[j];
                    else
                      s1_vals[j] = s1_vals[j]*beta1 + ((float)g_vals[j]);
                    if(unorm != NULL)
                      local_unorm += s1_vals[j]*s1_vals[j];
                    break;
              case LION:
                  s1_vals[j] = s1_vals[j]*beta2 + ((1.0f-beta2)*g_val);
                  break;
              case RMSPROP:
                    s1_vals[j] = s1_vals[j]*beta1 + ((1.0f-beta1)*(g_val*g_val));
                  break;
            }

            local_max_s1 = fmaxf(local_max_s1, fabsf(s1_vals[j]));
        }
    }

    __syncthreads();
    local_max_s1 = BlockReduce(temp_storage.reduce).Reduce(local_max_s1, cub::Max(), valid_items);
    if(threadIdx.x == 0){ atomicMax(&new_max1[0], local_max_s1); }
    if(unorm != NULL)
    {
      __syncthreads();
      local_unorm = BlockReduce(temp_storage.reduce).Reduce(local_unorm, cub::Sum(), valid_items);
      if(threadIdx.x == 0){ atomicAdd(&unorm[0], local_unorm); }
    }

}

template<typename T, int OPTIMIZER>
__global__ void
__launch_bounds__(1024, 1)
kOptimizerStatic8bit1State(T* p, T* const g, unsigned char* state1,
                const float *unorm, const float max_unorm, const float param_norm,
                const float beta1, const float beta2,
                const float eps, const int step, const float lr,
                float* __restrict__ const quantiles1,
                float* max1, float* new_max1,
                float weight_decay,
                const float gnorm_scale, const int n)
{

    const int n_full = (blockDim.x * gridDim.x)*NUM_PER_THREAD2;
    const int base_idx = (blockIdx.x * blockDim.x * NUM_PER_THREAD2);
    int valid_items = 0;
    float g_val = 0.0f;
    float s1_vals[NUM_PER_THREAD2];
    float new_max_val1 = 1.0f/new_max1[0];
    float update_scale = 1.0f;

    if(max_unorm > 0.0f)
    {
      update_scale = max_unorm > 0.0f ? sqrtf(unorm[0]) : 1.0f;
      if(update_scale > max_unorm*param_norm){ update_scale = (max_unorm*param_norm)/update_scale; }
      else{ update_scale = 1.0f; }
    }
    else{ update_scale = 1.0f; }

    unsigned char c1s[NUM_PER_THREAD2];
    T p_vals[NUM_PER_THREAD2];
    T g_vals[NUM_PER_THREAD2];
    typedef cub::BlockLoad<T, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
    typedef cub::BlockLoad<unsigned char, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadChar;

    typedef cub::BlockStore<unsigned char, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreChar;
    typedef cub::BlockStore<T, NUM_THREADS2, NUM_PER_THREAD2, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreT;

    __shared__ float smem_quantiles1[256];

    __shared__ union {
        typename LoadT::TempStorage loadh;
        typename LoadChar::TempStorage loadc;
        typename StoreChar::TempStorage storec;
        typename StoreT::TempStorage storeh;
    } temp_storage;

    if(threadIdx.x < 256)
        smem_quantiles1[threadIdx.x] = quantiles1[threadIdx.x];

    __syncthreads();

    for (unsigned int i = base_idx; i < n_full; i += gridDim.x*NUM_THREADS2*NUM_PER_THREAD2)
    {
        valid_items = n - i >= (TH*NUM_PER_THREAD) ? (TH*NUM_PER_THREAD) : n - i;
        LoadT(temp_storage.loadh).Load(&(g[i]), g_vals, valid_items, (T)0.0f);
        __syncthreads();
        LoadChar(temp_storage.loadc).Load(&(state1[i]), c1s, valid_items, 128);
        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(p[i]), p_vals, valid_items);

        if((i + (threadIdx.x*NUM_PER_THREAD2) + NUM_PER_THREAD2) > n){ continue; }

        # pragma unroll 4
        for(unsigned int j = 0; j < NUM_PER_THREAD2; j++)
        {
            g_val = float(g_vals[j]);
            g_val *= gnorm_scale;

            if(weight_decay > 0.0f) {
              switch(OPTIMIZER) {
		case ADAGRAD:
                case MOMENTUM:
                case RMSPROP:
                  g_val += ((float)p_vals[j])*weight_decay;
                  break;
                case LION:
                  p_vals[j] = ((float)p_vals[j])*(1.0f-lr*weight_decay);
                  break;
              }
            }

            s1_vals[j] = smem_quantiles1[c1s[j]]*max1[0];

            switch(OPTIMIZER){
		case ADAGRAD:
                case MOMENTUM:
                  if(step == 1)
                    s1_vals[j] = g_vals[j];
                  else
                    s1_vals[j] = s1_vals[j]*beta1 + ((float)g_vals[j]);

                  p_vals[j] = ((float)p_vals[j]) + (-lr*update_scale*(s1_vals[j]));
                  break;
              case LION:
                  p_vals[j] = ((float)p_vals[j]) - (lr*sgn(((float)s1_vals[j])*beta1 + ((1.0f-beta1)*((float)g_val))));
                  s1_vals[j] = s1_vals[j]*beta2 + ((1.0f-beta2)*g_val);
                  break;
              case RMSPROP:
                  s1_vals[j] = s1_vals[j]*beta1 + ((1.0f-beta1)*(g_val*g_val));
                  p_vals[j] = ((float)p_vals[j]) - (lr*__fdividef(g_val,sqrtf(s1_vals[j])+eps));
                  break;
            }

            c1s[j] = dQuantize<0>(smem_quantiles1, 0.0f, s1_vals[j]*new_max_val1);

            // make sure state1 term has still the same sign after quantization
            if(signbit(smem_quantiles1[c1s[j]]) != signbit(s1_vals[j]))
            {
              if(s1_vals[j] > 0.0f)
                  c1s[j] += 1;
              else
                  c1s[j] -= 1;
            }
        }

        StoreT(temp_storage.storeh).Store(&(p[i]), p_vals, valid_items);
        __syncthreads();
        StoreChar(temp_storage.storec).Store(&(state1[i]), c1s, valid_items);
        __syncthreads();
    }
}


template<typename T, int BLOCK_SIZE, int NUM_VALS>
__global__ void kPercentileClipping(T * __restrict__ g, float *gnorm_vec, int step, const int n)
{
  const int n_full = (BLOCK_SIZE*(n/BLOCK_SIZE)) + (n % BLOCK_SIZE == 0 ? 0 : BLOCK_SIZE);
  int valid_items = 0;

  typedef cub::BlockReduce<float, BLOCK_SIZE/NUM_VALS> BlockReduce;
  typedef cub::BlockLoad<T, BLOCK_SIZE/NUM_VALS, NUM_VALS, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;

  __shared__ typename BlockReduce::TempStorage reduce;

  __shared__ typename LoadT::TempStorage loadT;
  T vals[NUM_VALS];
  float local_sum = 0.0f;

  for (unsigned int i = (blockIdx.x * BLOCK_SIZE); i < n_full; i += gridDim.x*BLOCK_SIZE)
  {
      valid_items = n - i > BLOCK_SIZE ? BLOCK_SIZE : n - i;
      local_sum = 0.0f;

      __syncthreads();
      LoadT(loadT).Load(&(g[i]), vals, valid_items, (T)0.0f);

     #pragma unroll NUM_VALS
     for(int j = 0; j < NUM_VALS; j++)
       local_sum += ((float)vals[j])*((float)vals[j]);

    local_sum = BlockReduce(reduce).Sum(local_sum, valid_items);
    if(threadIdx.x == 0)
    {
      if(step == 1)
      {
        // initialize with the same norm for all positions
        //#pragma unroll 10
        for(int j = 0; j < 100; j++)
          atomicAdd(&gnorm_vec[j], local_sum);
      }
      else
          atomicAdd(&gnorm_vec[step % 100], local_sum);
    }

  }
}


#define LANES 2
#define QUAD 3
template<typename T, int OPTIMIZER, int BLOCK_SIZE, int N_PER_TH>
__launch_bounds__(256, 3)
__global__ void
kOptimizerStatic8bit2StateBlockwise(
    T* p,
    T* __restrict__ const g,
    unsigned char* state1,
    unsigned char* state2,
    const float beta1,
    const float beta2,
    const float beta3,
    const float alpha,
    const float eps,
    const int step,
    const float lr,
    float* __restrict__ const quantiles1,
    float* __restrict__ const quantiles2,
    float* absmax1,
    float* absmax2,
    float weight_decay,
    const float gnorm_scale,
    const bool skip_zeros,
    const int n
) {

    //const int n_full = n + (n%BLOCK_SIZE);
    const int n_full = gridDim.x * BLOCK_SIZE;
    const int base_idx = (blockIdx.x * BLOCK_SIZE);
    int valid_items = 0;
    float g_val = 0.0f;
    float s1_vals[N_PER_TH];
    float s2_vals[N_PER_TH];
    float s3_vals[N_PER_TH];

    // 2-5%
    const float correction1 = 1.0f - __powf(beta1, step);
    const float correction2 = sqrtf(1.0f -__powf(beta2, step));
    const float step_size = __fdividef(-lr*correction2,correction1);
    const int lane_id = threadIdx.x % LANES;
    float new_local_abs_max1 = -FLT_MAX;
    float new_local_abs_max2 = -FLT_MAX;
    float new_local_abs_max3 = -FLT_MAX;
    float quadrants1[QUAD];
    float quadrants2[QUAD];

    unsigned char c1s[N_PER_TH];
    unsigned char c2s[N_PER_TH];
    unsigned char c3s[N_PER_TH];

    T g_vals[N_PER_TH];
    T p_vals[N_PER_TH];
    typedef cub::BlockLoad<T, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
    typedef cub::BlockLoad<unsigned char, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadChar;

    typedef cub::BlockStore<unsigned char, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreChar;
    typedef cub::BlockStore<T, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreT;

    __shared__ float smem_quantiles1[LANES][257];
    __shared__ float smem_quantiles2[LANES][257];
    typedef cub::BlockReduce<float, BLOCK_SIZE/N_PER_TH> BlockReduce1;
    typedef cub::BlockReduce<float, BLOCK_SIZE/N_PER_TH> BlockReduce2;
    typedef cub::BlockReduce<float, BLOCK_SIZE/N_PER_TH> BlockReduce3;
    __shared__ typename BlockReduce1::TempStorage reduce1;
    __shared__ typename BlockReduce2::TempStorage reduce2;
    __shared__ typename BlockReduce2::TempStorage reduce3;
    __shared__ float smem_exchange1[1];
    __shared__ float smem_exchange2[1];
    __shared__ float smem_exchange3[1];   // [[maybe_unused]]

    __shared__ union {
        typename LoadT::TempStorage loadh;
        typename LoadChar::TempStorage loadc;
        typename StoreChar::TempStorage storec;
        typename StoreT::TempStorage storeh;
    } temp_storage;
    // init: 0.2 -> 0.23

    // 0.23 -> 0.23
      smem_quantiles1[0][threadIdx.x] = quantiles1[threadIdx.x];
      smem_quantiles2[0][threadIdx.x] = quantiles2[threadIdx.x];
      # pragma unroll
      for(unsigned int j = 1; j < LANES; j++)
      {
        smem_quantiles1[j][threadIdx.x] = smem_quantiles1[0][threadIdx.x];
        smem_quantiles2[j][threadIdx.x] = smem_quantiles2[0][threadIdx.x];
      }

    __syncthreads();

    #pragma unroll
    for(int k = 0; k < QUAD; k++)
    {
      quadrants1[k] = smem_quantiles1[lane_id][(k*256/(QUAD+1)) + (256/(QUAD+1)-1)];
      quadrants2[k] = smem_quantiles2[lane_id][(k*256/(QUAD+1)) + (256/(QUAD+1)-1)];
    }


    for (unsigned int i = base_idx; i < n_full; i += gridDim.x*BLOCK_SIZE)
    {
        // loads: 0.23 -> 0.85/1.44
        valid_items = n - i >= BLOCK_SIZE ? BLOCK_SIZE : n - i;
        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(g[i]), g_vals, valid_items, (T)0.0f);
        __syncthreads();
        LoadChar(temp_storage.loadc).Load(&(state1[i]), c1s, valid_items, 128);
        __syncthreads();
        LoadChar(temp_storage.loadc).Load(&(state2[i]), c2s, valid_items, 0);

        // AdEMAMix has an additional state packed into state1.
        if (OPTIMIZER == ADEMAMIX) {
          __syncthreads();
          LoadChar(temp_storage.loadc).Load(&(state1[n + i]), c3s, valid_items, 128);
        }

        new_local_abs_max1 = -FLT_MAX;
        new_local_abs_max2 = -FLT_MAX;
        new_local_abs_max3 = -FLT_MAX;

        //  update: 2.48/1.57 -> 2.51/1.60
        # pragma unroll N_PER_TH
        for(unsigned int j = 0; j < N_PER_TH; j++)
        {
            if(!isnan((float)g_vals[j]) && !isinf((float)g_vals[j]))
						{
							s2_vals[j] = smem_quantiles2[lane_id][c2s[j]]*absmax2[i/BLOCK_SIZE];
              g_val = g_vals[j];
              //float ratio = (g_val*g_val)/fmaxf(s2_vals[j], eps*eps);
              //g_val = ratio > 2.0f ? 2.0f*g_val/ratio : g_val;
              g_val *= gnorm_scale;

							s2_vals[j] = (s2_vals[j]*beta2) + (((1.0f-beta2)*g_val*g_val));

							s1_vals[j] = smem_quantiles1[lane_id][c1s[j]]*absmax1[i/BLOCK_SIZE];
							s1_vals[j] = (s1_vals[j]*beta1) + (((1.0f-beta1)*g_val));

              if (OPTIMIZER == ADEMAMIX) {
                // The absmax for the third state is appended to absmax1
                s3_vals[j] = smem_quantiles1[lane_id][c3s[j]] * absmax1[(n + i)/BLOCK_SIZE];
                s3_vals[j] = (s3_vals[j] * beta3) + (((1.0f - beta3) * g_val));
              }
						}
            else
            {
              s1_vals[j] = 0.0f;
              s2_vals[j] = 0.0f;

              if (OPTIMIZER == ADEMAMIX) {
                s3_vals[j] = 0.0f;
              }
            }

            new_local_abs_max1 = fmaxf(new_local_abs_max1, fabsf(s1_vals[j]));
            new_local_abs_max2 = fmaxf(new_local_abs_max2, fabsf(s2_vals[j]));

            if (OPTIMIZER == ADEMAMIX) {
              new_local_abs_max3 = fmaxf(new_local_abs_max3, fabsf(s3_vals[j]));
            }
        }


        //  reduce: 2.51/1.60 -> 2.67/1.69
        new_local_abs_max1 = BlockReduce1(reduce1).Reduce(new_local_abs_max1, cub::Max());
        new_local_abs_max2 = BlockReduce2(reduce2).Reduce(new_local_abs_max2, cub::Max());

        if (OPTIMIZER == ADEMAMIX) {
          new_local_abs_max3 = BlockReduce3(reduce3).Reduce(new_local_abs_max3, cub::Max());
        }

        if(threadIdx.x == 0)
        {
          smem_exchange1[0] = new_local_abs_max1;
          smem_exchange2[0] = new_local_abs_max2;

          if (OPTIMIZER == ADEMAMIX) {
            smem_exchange3[0] = new_local_abs_max3;
          }
        }

        __syncthreads();

        if(threadIdx.x == 0)
        {
          absmax1[i/BLOCK_SIZE] = new_local_abs_max1;
          absmax2[i/BLOCK_SIZE] = new_local_abs_max2;

          if (OPTIMIZER == ADEMAMIX) {
            absmax1[(n + i)/BLOCK_SIZE] = new_local_abs_max3;
          }
        }
        else
        {
          new_local_abs_max1 = smem_exchange1[0];
          new_local_abs_max2 = smem_exchange2[0];

          if (OPTIMIZER == ADEMAMIX) {
            new_local_abs_max3 = smem_exchange3[0];
          }
        }

        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(p[i]), p_vals, valid_items, (T)0.0f);
        //  reduce: 2.67/1.69 -> 2.67/1.70
        # pragma unroll N_PER_TH
        for(unsigned int j = 0; j < N_PER_TH; j++)
        {
						//if(!skip_zeros || (skip_zeros && ((float)g_vals[j] != 0.0f)))
            if(!isnan((float)g_vals[j]) && !isinf((float)g_vals[j]))
						{
              if (OPTIMIZER == ADEMAMIX) {
                p_vals[j] = T((float)p_vals[j] - lr * (
                  ((s1_vals[j] / correction1) + (alpha * s3_vals[j])) / (
                    (sqrtf(s2_vals[j]) / correction2) + eps
                  )
                ));
              } else {
                p_vals[j] = (T)(((float)p_vals[j]) + ((step_size*(__fdividef(s1_vals[j],(sqrtf(s2_vals[j])+(correction2*eps)))))));
              }

              if(weight_decay > 0.0f)
									p_vals[j] = ((float)p_vals[j])*(1.0f-(lr*weight_decay));
						}
        }

        //  store: 0.85/1.44 -> 2.48/1.57
        __syncthreads();
        StoreT(temp_storage.storeh).Store(&(p[i]), p_vals, valid_items);

        //  quantizaztion: 2.67/1.70  -> 3.4/3.3
        # pragma unroll N_PER_TH
        for(unsigned int j = 0; j < N_PER_TH; j++)
        {
            c1s[j] = quantize_2D<1>(quadrants1, smem_quantiles1[lane_id], __fdividef(s1_vals[j],new_local_abs_max1));
            c2s[j] = quantize_2D<0>(quadrants2, smem_quantiles2[lane_id], __fdividef(s2_vals[j],new_local_abs_max2));

            // make sure state1 term has still the same sign after quantization
            // (not needed for state2 term which has only positive values)
            if(signbit(smem_quantiles1[lane_id][c1s[j]]) != signbit(s1_vals[j]))
            {
              if(s1_vals[j] > 0.0f)
                  c1s[j] += 1;
              else
                  c1s[j] -= 1;
            }

            if (OPTIMIZER == ADEMAMIX) {
              c3s[j] = quantize_2D<1>(quadrants1, smem_quantiles1[lane_id], __fdividef(s3_vals[j],new_local_abs_max3));

              if (signbit(smem_quantiles1[lane_id][c3s[j]]) != signbit(s3_vals[j])) {
                c3s[j] += (s3_vals[j] > 0.0f) ? 1 : -1;
              }
            }
        }

        __syncthreads();
        StoreChar(temp_storage.storec).Store(&(state1[i]), c1s, valid_items);
        __syncthreads();
        StoreChar(temp_storage.storec).Store(&(state2[i]), c2s, valid_items);

        if (OPTIMIZER == ADEMAMIX) {
          __syncthreads();
          StoreChar(temp_storage.storec).Store(&(state1[n + i]), c3s, valid_items);
        }
    }
}


#define LANES 2
#define QUAD 3
template<typename T, int OPTIMIZER, int BLOCK_SIZE, int N_PER_TH>
__launch_bounds__(256, 3)
__global__ void
kOptimizerStatic8bit1StateBlockwise(T* p, T* __restrict__ const g, unsigned char* state1,
                const float beta1, const float beta2,
                const float eps, const int step, const float lr,
                float* __restrict__ const quantiles1,
                float* absmax1,
                float weight_decay,
                const float gnorm_scale, const bool skip_zeros, const int n)
{

    //const int n_full = n + (n%BLOCK_SIZE);
    const int n_full = gridDim.x * BLOCK_SIZE;
    const int base_idx = (blockIdx.x * BLOCK_SIZE);
    int valid_items = 0;
    float g_val = 0.0f;
    float s1_vals[N_PER_TH];
    // 2-5%
    const int lane_id = threadIdx.x % LANES;
    float new_local_abs_max1 = -FLT_MAX;
    float quadrants1[QUAD];

    unsigned char c1s[N_PER_TH];
    T g_vals[N_PER_TH];
		T p_vals[N_PER_TH];

    typedef cub::BlockLoad<T, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadT;
    typedef cub::BlockLoad<unsigned char, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_LOAD_WARP_TRANSPOSE> LoadChar;

    typedef cub::BlockStore<unsigned char, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreChar;
    typedef cub::BlockStore<T, BLOCK_SIZE/N_PER_TH, N_PER_TH, cub::BLOCK_STORE_WARP_TRANSPOSE> StoreT;

    __shared__ float smem_quantiles1[LANES][257];
    typedef cub::BlockReduce<float, BLOCK_SIZE/N_PER_TH> BlockReduce1;
    __shared__ typename BlockReduce1::TempStorage reduce1;
    __shared__ float smem_exchange1[1];

    __shared__ union {
        typename LoadT::TempStorage loadh;
        typename LoadChar::TempStorage loadc;
        typename StoreChar::TempStorage storec;
        typename StoreT::TempStorage storeh;
    } temp_storage;
    // init: 0.2 -> 0.23

    // 0.23 -> 0.23
		smem_quantiles1[0][threadIdx.x] = quantiles1[threadIdx.x];
		# pragma unroll
		for(unsigned int j = 1; j < LANES; j++)
			smem_quantiles1[j][threadIdx.x] = smem_quantiles1[0][threadIdx.x];

    __syncthreads();

    #pragma unroll
    for(int k = 0; k < QUAD; k++)
      quadrants1[k] = smem_quantiles1[lane_id][(k*256/(QUAD+1)) + (256/(QUAD+1)-1)];

    for (unsigned int i = base_idx; i < n_full; i += gridDim.x*BLOCK_SIZE)
    {
        // loads: 0.23 -> 0.85/1.44
        valid_items = n - i >= BLOCK_SIZE ? BLOCK_SIZE : n - i;
        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(g[i]), g_vals, valid_items, (T)0.0f);
        __syncthreads();
        LoadChar(temp_storage.loadc).Load(&(state1[i]), c1s, valid_items, 128);
        __syncthreads();
        LoadT(temp_storage.loadh).Load(&(p[i]), p_vals, valid_items, (T)0.0f);

        new_local_abs_max1 = -FLT_MAX;

        //  update: 2.48/1.57 -> 2.51/1.60
        # pragma unroll N_PER_TH
        for(unsigned int j = 0; j < N_PER_TH; j++)
        {
            g_val = float(g_vals[j]);
            g_val *= gnorm_scale;
            if(!skip_zeros || (skip_zeros && ((float)g_vals[j] != 0.0f)))
            {
              if(weight_decay > 0.0f) {
                switch(OPTIMIZER) {
                  case MOMENTUM:
                  case ADAGRAD:
                  case RMSPROP:
                    g_val += ((float)p_vals[j])*weight_decay;
                    break;
                  case LION:
                    p_vals[j] = ((float)p_vals[j])*(1.0f-lr*weight_decay);
                    break;
                }
              }

							s1_vals[j] = smem_quantiles1[lane_id][c1s[j]]*absmax1[i/BLOCK_SIZE];

							switch(OPTIMIZER)
							{
									case MOMENTUM:
										if(step == 1)
											s1_vals[j] = g_val;
										else
											s1_vals[j] = (s1_vals[j]*beta1) + g_val;
										break;
									case LION:
										// here, using gvals[j] to store the gradient smoothed by beta1 for the following parameter update, before the momentum is updated by beta2
										g_vals[j] = lr*sgn(((float)s1_vals[j])*beta1 + ((1.0f-beta1)*g_val));
										s1_vals[j] = s1_vals[j]*beta2 + ((1.0f-beta2)*g_val);
										break;
									case RMSPROP:
										s1_vals[j] = s1_vals[j]*beta1 + ((1.0f-beta1)*(g_val*g_val));
										break;
									case ADAGRAD:
										s1_vals[j] = s1_vals[j] + (g_val*g_val);
										break;
							}
						}

            new_local_abs_max1 = fmaxf(new_local_abs_max1, fabsf(s1_vals[j]));
        }


        //  reduce: 2.51/1.60 -> 2.67/1.69
        new_local_abs_max1 = BlockReduce1(reduce1).Reduce(new_local_abs_max1, cub::Max());

        if(threadIdx.x == 0)
          smem_exchange1[0] = new_local_abs_max1;

        __syncthreads();

        if(threadIdx.x == 0)
          absmax1[i/BLOCK_SIZE] = new_local_abs_max1;
        else
          new_local_abs_max1 = smem_exchange1[0];

        //  reduce: 2.67/1.69 -> 2.67/1.70
        # pragma unroll N_PER_TH
        for(unsigned int j = 0; j < N_PER_TH; j++)
				{
						if(!skip_zeros || (skip_zeros && ((float)g_vals[j] != 0.0f)))
						{
							switch(OPTIMIZER)
							{
									case MOMENTUM:
										p_vals[j] = ((float)p_vals[j]) - lr*(s1_vals[j]);
										break;
									case LION:
										p_vals[j] = ((float)p_vals[j]) - ((float)g_vals[j]);
										break;
									case RMSPROP:
										g_val = g_vals[j];
										p_vals[j] = ((float)p_vals[j]) - lr*(__fdividef(g_val, sqrtf(s1_vals[j])+eps));
										break;
									case ADAGRAD:
										g_val = g_vals[j];
										p_vals[j] = ((float)p_vals[j]) - lr*(__fdividef(g_val, sqrtf(s1_vals[j])+eps));
										break;
							}
						}
				}

        //  store: 0.85/1.44 -> 2.48/1.57
        __syncthreads();
        StoreT(temp_storage.storeh).Store(&(p[i]), p_vals, valid_items);

        //  quantizaztion: 2.67/1.70  -> 3.4/3.3
        # pragma unroll N_PER_TH
        for(unsigned int j = 0; j < N_PER_TH; j++)
        {
            c1s[j] = quantize_2D<1>(quadrants1, smem_quantiles1[lane_id], __fdividef(s1_vals[j],new_local_abs_max1));

            // make sure state1 term has still the same sign after quantization
            // (not needed for state2 term which has only positive values)
            if(signbit(smem_quantiles1[lane_id][c1s[j]]) != signbit(s1_vals[j]))
            {
              if(s1_vals[j] > 0.0f)
                  c1s[j] += 1;
              else
                  c1s[j] -= 1;
            }
        }

        __syncthreads();
        StoreChar(temp_storage.storec).Store(&(state1[i]), c1s, valid_items);
    }
}

// Inputs:
//  A [rows, cols]
// Outputs:
//  rowStats [rows]
//  out [rows, cols]
template<typename T, int THREADS, int SPARSE_DECOMP>
__launch_bounds__(1024, BNB_MAX_THREADS_PER_SM / 1024)
__global__ void kInt8VectorQuant(T * __restrict__ A, int8_t* out, float* rowStats, float threshold, int rows, int cols) {

  // For sm50/sm52 and CUDA < 12.2 we need to do the reduction in fp32.
  // Otherwise `T` is `fp16`. This can be removed when Maxwell is dropped.
#if (__CUDACC_VER_MAJOR__ >= 12 && __CUDACC_VER_MINOR >= 2) || BNB_FP16_AVAILABLE
  using TReduction = T;
#else
  using TReduction = float;
#endif

  using BlockReduceT = cub::BlockReduce<TReduction, THREADS>;

  // One block per row.
  // Threads load column values in a striped arrangement.
  // e.g. t0 reads row[0], row[0+nthreads], ..
  // and  t1 reads row[1], row[1+nthreads], ..
  // Each thread will determine its local absmax.
  // We then do a blockwise reduction to determine the row's absmax.

  __shared__ typename BlockReduceT::TempStorage temp_storage;
  __shared__ TReduction smem_row_absmax;

  const int row_id = blockIdx.x;
  const T* row_data = A + (row_id * cols);

  // Threads will read the row values in a striped access pattern and find a local absmax.
  TReduction row_local_absmax = -FLT_MIN;
  for (int i = threadIdx.x; i < cols; i += THREADS) {
    const TReduction absval = fabsf(__ldcs(&(row_data[i])));

    // For sparse decomposition, values outside of the threshold are not to be
    // included when calculating the row's absmax.
    if constexpr (SPARSE_DECOMP) {
      row_local_absmax = fmaxf(row_local_absmax, absval < TReduction(threshold) ? absval : row_local_absmax);
    } else {
      row_local_absmax = fmaxf(row_local_absmax, absval);
    }
  }

  // Reduce thread-local absmax across the block.
  const TReduction row_absmax = BlockReduceT(temp_storage).Reduce(row_local_absmax, cub::Max(), cols);
  if (threadIdx.x == 0) {
    // Save our block's absmax to shared memory for the quantization step.
    rowStats[row_id] = smem_row_absmax = row_absmax;
  }
  __syncthreads();

  // Quantize row-wise.
  const float scale = __fdividef(127.0f, smem_row_absmax);
  for (int i = threadIdx.x; i < cols; i += THREADS) {
    float val = row_data[i];

    if constexpr (SPARSE_DECOMP) {
      // For sparse decomposition, we do not want to quantize the outliers.
      // Instead they're zeroed out.
      out[row_id * cols + i] = fabs(val) < threshold ? __float2int_rn(val * scale) : 0;
    } else {
      out[row_id * cols + i] = __float2int_rn(val * scale);
    }
  }
}

template<typename T, int THREADS, int SPARSE_DECOMP>
__launch_bounds__(1024, BNB_MAX_THREADS_PER_SM / 1024)
__global__ void kgetRowStats(T * __restrict__ A, float *rowStats, float threshold, int rows, int cols) {
  using BlockReduceT = cub::BlockReduce<float, THREADS>;

  // One block per row.
  // Threads load column values in a striped arrangement.
  // e.g. t0 reads row[0], row[0+nthreads], ..
  // and  t1 reads row[1], row[1+nthreads], ..
  // Each thread will determine its local absmax.
  // We then do a blockwise reduction to determine the row's absmax.

  __shared__ typename BlockReduceT::TempStorage temp_storage;

  const int row_id = blockIdx.x;
  const T* __restrict__ row_data = A + (row_id * cols);

  // Threads will read the row values in a striped access pattern and find a local absmax.
  float row_local_absmax = -FLT_MIN;
  for (int i = threadIdx.x; i < cols; i += THREADS) {
    const float absval = fabsf(row_data[i]);

    // For sparse decomposition, values outside of the threshold are not to be
    // included when calculating the row's absmax.
    if constexpr (SPARSE_DECOMP) {
      row_local_absmax = fmaxf(row_local_absmax, absval < threshold ? absval : row_local_absmax);
    } else {
      row_local_absmax = fmaxf(row_local_absmax, absval);
    }
  }

  // Reduce thread-local absmax across the block.
  // TODO: Consider algorithm BLOCK_REDUCE_RAKING_COMMUTATIVE_ONLY
  const float row_absmax = BlockReduceT(temp_storage).Reduce(row_local_absmax, cub::Max(), cols);
  if (threadIdx.x == 0) {
    // Save our block's absmax to shared memory for the quantization step.
    rowStats[row_id] = row_absmax;
  }
}

template __global__ void kgetRowStats<half, 1024, 0>(half * __restrict__ A, float *rowStats, float threshold, int rows, int cols);
template __global__ void kgetRowStats<half, 1024, 1>(half * __restrict__ A, float *rowStats, float threshold, int rows, int cols);

template __global__ void kInt8VectorQuant<half, 1024, 0>(half * __restrict__ A, int8_t *out, float *rowStats, float threshold, int rows, int cols);
template __global__ void kInt8VectorQuant<half, 1024, 1>(half * __restrict__ A, int8_t *out, float *rowStats, float threshold, int rows, int cols);


#define MM_DEQUANT_CONST 6.200012e-05f //1.0f/(127.0f*127.0f)

template <int ITEMS_PER_THREAD, int THREADS>
__global__ void kdequant_mm_int32_fp16(
  int* __restrict__ const A,
  float *__restrict__ const rowStats,
  float *__restrict__ const colStats,
  half *out,
  half *__restrict__ const bias,
  const int numRows,
  const int numCols,
  const int n
) {
  const int n_out = numRows * numCols;

  int block_offset = blockIdx.x * THREADS * ITEMS_PER_THREAD;
  int thread_offset = threadIdx.x * ITEMS_PER_THREAD;

  int local_values[ITEMS_PER_THREAD];
  half local_output[ITEMS_PER_THREAD];

  float local_rowStats[ITEMS_PER_THREAD];
  float local_colStats[ITEMS_PER_THREAD];
  float local_biasValue[ITEMS_PER_THREAD];

  typedef cub::BlockLoad<int, THREADS, ITEMS_PER_THREAD, cub::BLOCK_LOAD_VECTORIZE> LoadInt32;
  __shared__ typename LoadInt32::TempStorage loadint32;

  int row_idx, col_idx;

  #pragma unroll ITEMS_PER_THREAD
  for (int j = 0; j < ITEMS_PER_THREAD; ++j) {

    row_idx = (block_offset + thread_offset + j) / numCols;
    col_idx = (block_offset + thread_offset + j) % numCols;

    local_colStats[j] = col_idx >= numCols ? 0.0f : __ldg(&colStats[col_idx]);
    local_rowStats[j] = row_idx >= numRows ? 0.0f : __ldg(&rowStats[row_idx]);
    local_biasValue[j] = ((bias == nullptr) || col_idx >= numCols) ? 0.0f : __half2float(bias[col_idx]);
  }

  // Each block loads THREADS * ITEMS_PER_THREAD values from A
  int valid_items = block_offset + THREADS * ITEMS_PER_THREAD < n_out
    ? THREADS * ITEMS_PER_THREAD
    : n_out - block_offset;
  LoadInt32(loadint32).Load(&(A[block_offset]), local_values, valid_items, 0);

  #pragma unroll ITEMS_PER_THREAD
  for (int j = 0; j < ITEMS_PER_THREAD; ++j) {
    local_output[j] = __float2half(
      fmaf(local_values[j] * local_rowStats[j] * local_colStats[j], MM_DEQUANT_CONST, local_biasValue[j])
    );
  }

  #pragma unroll ITEMS_PER_THREAD
  for (int j = 0; j < ITEMS_PER_THREAD; j++) {
    int outIdx = block_offset + thread_offset + j;
    if (outIdx < n_out) {
      out[outIdx] = local_output[j];
    }
  }
}

#define DENORM 1.0f/127.0f
#define MAX_SPARSE_COUNT 32
#define SMEM_SIZE 8*256
template <typename T, int SPMM_ITEMS, int BITS>
__global__ void kspmm_coo_very_sparse_naive(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, T *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB)
{

  // 0. load balancing: We process rows with most columns first (count_vec)and we process one row per block
  //    If a block finishes, the next one is scheduled. Since the last blocks like have fewer
  //    elements they finish faster "fillin up" the gaps left by larger blocks

  // without tensor cores
  // 1. use rowidx_length to find what to load (as many blocks as there are rows)
  // 2. Load A into registers
  // 3. each warp loads all required rows of B but each warp is offset by k
  // 4. Do mma operations that accumulate into registers
  // 5. Each warp stores its output row into matrix C

  const int count = max_count[blockIdx.x];
  const int local_max_idx = max_idx[blockIdx.x];
  const int offset = local_max_idx == 0 ? 0 : offset_rowidx[local_max_idx-1];
  const int local_row_idx = rowidx[offset];

  const int warp_id = threadIdx.x / 32;
  const int warp_idx = threadIdx.x % 32;
  const int warp_offset = (warp_id*32)*SPMM_ITEMS;
  const int num_items = BITS == 8 ? 8 : 8;
  int idx_col_B = warp_offset;
  int local_idx_col_B_offset = 0;

  half local_valA[MAX_SPARSE_COUNT];
  int local_colidxA[MAX_SPARSE_COUNT];
  half local_valC[SPMM_ITEMS];
  T local_valsB[num_items];
  half local_valOut[num_items];
  // 128 byte loads per warp == 4 bytes per thread

  // 2. Load A into registers
  for(int j = 0; j < MAX_SPARSE_COUNT; j++)
  {
    local_valA[j] = j < count ? values[offset+j] : __float2half(0.0f);
    local_colidxA[j] = j < count ? colidx[offset+j] : 0;
  }

  // each thread processes SPMM_ITEMS=32 per iteration. We have 256 threads. 32*256=x192
  // we expect each warp to be SPMM_ITEMS*32 apart
  // we have a total of 128 bytes for the bank with a bank size of 4 bytes
  // added 3 bytes = 6 values between warps should reduce bank conflicts
  __shared__ half smem_dequant_stats[SMEM_SIZE];


  while(idx_col_B <  colsB)
  {

    if(dequant_stats != NULL)
    {
      for(int i = threadIdx.x; i < SMEM_SIZE; i+=blockDim.x)
        if((idx_col_B+i-local_idx_col_B_offset) < colsB)
          smem_dequant_stats[i] = dequant_stats[idx_col_B+i-local_idx_col_B_offset];

      __syncthreads();
    }

    #pragma unroll SPMM_ITEMS
    for(int j = 0; j < SPMM_ITEMS; j++)
      local_valC[j] = 0.0f;

    #pragma unroll
    for(int i = 0; i < count; i++)
    {
        // 3. each warp loads all required rows of B but each warp is offset by k
        int row_offset = colsB*local_colidxA[i];

        #pragma unroll SPMM_ITEMS
        for(int j = 0; j < SPMM_ITEMS; j+=num_items)
        {
          // 4. Multiply the tile -> accumulate outputs in shared memory until 128 bytes it reached
          int idx = idx_col_B + (warp_idx*SPMM_ITEMS) + j;
          if(idx >= colsB){ break; }
          if((idx+num_items < colsB))
          {
            if(BITS == 8)
              reinterpret_cast<float2(&)[num_items]>(local_valsB)[0] = reinterpret_cast<float2*>(B)[(row_offset+ idx)/num_items];
            else
              reinterpret_cast<float4(&)[num_items]>(local_valsB)[0] = reinterpret_cast<float4*>(B)[(row_offset+ idx)/num_items];
          }
          else
          {
            #pragma unroll num_items
            for(int k = 0; k < num_items; k++)
              if(idx+k < colsB)
                local_valsB[k] = B[row_offset+idx+k];
              else
                local_valsB[k] = 0.0f;
          }
          #pragma unroll num_items
          for(int k = 0; k < num_items; k++)
          {
            if(BITS == 8 && dequant_stats != NULL)
              // we do texture cache reads (__ldg) on dequant_stats which should be super fast
            {
              float valB = local_valsB[k];
              float valA = local_valA[i];
              if(valB != 0.0 && valA != 0.0)
                local_valC[j+k] = (float)local_valC[j+k] + ((float)smem_dequant_stats[idx+k-local_idx_col_B_offset])*DENORM*valB*valA;
            }
            else
              local_valC[j+k] = (float)local_valC[j+k] + (float)local_valsB[k]*(float)local_valA[i];
          }
        }
    }

    int idx_row_C = (colsB*local_row_idx);

    #pragma unroll SPMM_ITEMS
    for(int j = 0; j < SPMM_ITEMS; j+=num_items)
    {
      //int idx_col_C =  idx_col_B + (32*j) + warp_idx;
      int idx_col_C =  idx_col_B + warp_idx*SPMM_ITEMS + j;
      int idx_val = idx_col_C + idx_row_C;

      if(idx_col_C +num_items < colsB)
      {

          // load outputs to do inplace addition
          reinterpret_cast<float4(&)[num_items/4]>(local_valOut)[0] = reinterpret_cast<float4*>(out)[idx_val/num_items];

          #pragma unroll num_items
          for(int k = 0; k < num_items; k++)
            local_valC[(j/num_items) + k] = (float)local_valC[(j/num_items) + k] + (float)local_valOut[k];

          reinterpret_cast<float4*>(out)[idx_val/num_items] = reinterpret_cast<float4(&)[num_items]>(local_valC)[j/num_items];
      }
      else
      {
        #pragma unroll num_items
        for(int k = 0; k < num_items; k++)
         if(idx_col_C + k < colsB)
           out[idx_val+k] = (float)out[idx_val+k]+(float)local_valC[j+k];
      }
    }

    idx_col_B += blockDim.x*SPMM_ITEMS;
    local_idx_col_B_offset += blockDim.x*SPMM_ITEMS;
  }
}

#define WARPS 3
template <typename T, int BITS, int THREADS> __global__ void gemm_device(int M, int N, int K, T * __restrict__ const A,  T* B,  T * out,  int lda, int ldb, int ldc)
{

#if __CUDA_ARCH__ >= 750
	using namespace nvcuda;
  int col_offset = blockIdx.x *32;
  const int warp_id = threadIdx.x / 32;
  const int half_warp_id = threadIdx.x / 16;
  const int half_warp_lane = threadIdx.x % 16;
  const int batch_size_warps = (WARPS-1)*2;
  const int val_per_iter = blockDim.x-32;

  T local_A[4];
  T local_B[128];

  const int a_tile_offset = 16;
  const int b_tile_offset = (16*32 + 16);

  __shared__ T smem_A[8*16 + (2*16*(batch_size_warps-1))];
  __shared__ T smem_B[2*batch_size_warps*16*32 + (2*16*(batch_size_warps-1))];
  //__shared__ T smem_C[8*32];

   wmma::fragment<wmma::matrix_a, 8, 32, 16, half, wmma::row_major> a_frag;
   wmma::fragment<wmma::matrix_b, 8, 32, 16, half, wmma::col_major> b_frag;
   wmma::fragment<wmma::accumulator, 8, 32, 16, half> c_frag;
   wmma::fill_fragment(c_frag, 0.0f);

  int ticktock = 0;
  int idx = 0 + threadIdx.x;
  int loaded_values = 0;
  // prefetch
  if(idx < K && warp_id < (WARPS-1))
  {
    if(loaded_values == 0)
    {
      local_A[0] = A[idx];
      local_A[1] = A[idx+(1*val_per_iter)];
      local_A[2] = A[idx+(2*val_per_iter)];
      local_A[3] = A[idx+(3*val_per_iter)];

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
      {
        local_B[col] = B[(col_offset+col)*ldb+idx];
        local_B[col+32] = B[(col_offset+col)*ldb+idx+(1*val_per_iter)];
        local_B[col+64] = B[(col_offset+col)*ldb+idx+(2*val_per_iter)];
        local_B[col+96] = B[(col_offset+col)*ldb+idx+(3*val_per_iter)];
      }
      loaded_values = 3;
    }
    else
    {

      if(loaded_values == 3)
      {
        local_A[0] = local_A[1];
        #pragma unroll 32
        for(int col = 0; col < 32; col++)
          local_B[col] = local_B[col+(32)];
      }
      else if(loaded_values == 2)
      {
        local_A[0] = local_A[2];
        #pragma unroll 32
        for(int col = 0; col < 32; col++)
          local_B[col] = local_B[col+(64)];
      }
      else
      {
        local_A[0] = local_A[3];
        #pragma unroll 32
        for(int col = 0; col < 32; col++)
          local_B[col] = local_B[col+(96)];
      }
      loaded_values--;
    }

    smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] = local_A[0];

    #pragma unroll 32
    for(int col = 0; col < 32; col++)
        smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = local_B[col];
  }
  else if(warp_id < (WARPS-1))
  {
    local_A[0] = T(0.0);
    smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] =  0.0f;

    #pragma unroll 32
    for(int col = 0; col < 32; col++)
      local_B[col] = 0.0f;

    #pragma unroll 32
    for(int col = 0; col < 32; col++)
      smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = 0.0f;
  }
  ticktock = ticktock == 0 ? 1 : 0;

  //for(int base_idx = blockDim.x-32; base_idx < K; base_idx+=blockDim.x-32)
  for(int base_idx = blockDim.x-32; base_idx < K; base_idx+=blockDim.x-32)
  {
    idx = base_idx + threadIdx.x;

    __syncthreads();
    if(idx < K && warp_id < (WARPS-1))
    {
      //local_A[0] = A[idx];

      //#pragma unroll 32
      //for(int col = 0; col < 32; col++)
      //  local_B[col] = B[(col_offset+col)*ldb+idx];
      if(loaded_values == 0)
      {
        local_A[0] = A[idx];
        local_A[1] = A[idx+(1*val_per_iter)];
        local_A[2] = A[idx+(2*val_per_iter)];
        local_A[3] = A[idx+(3*val_per_iter)];

        #pragma unroll 32
        for(int col = 0; col < 32; col++)
        {
          local_B[col] = B[(col_offset+col)*ldb+idx];
          local_B[col+32] = B[(col_offset+col)*ldb+idx+(1*val_per_iter)];
          local_B[col+64] = B[(col_offset+col)*ldb+idx+(2*val_per_iter)];
          local_B[col+96] = B[(col_offset+col)*ldb+idx+(3*val_per_iter)];
        }
        loaded_values = 3;

      }
      else
      {

        if(loaded_values == 3)
        {
          local_A[0] = local_A[1];
          #pragma unroll 32
          for(int col = 0; col < 32; col++)
            local_B[col] = local_B[col+(32)];
        }
        else if(loaded_values == 2)
        {
          local_A[0] = local_A[2];
          #pragma unroll 32
          for(int col = 0; col < 32; col++)
            local_B[col] = local_B[col+(64)];
        }
        else
        {
          local_A[0] = local_A[3];
          #pragma unroll 32
          for(int col = 0; col < 32; col++)
            local_B[col] = local_B[col+(96)];
        }
        loaded_values--;
      }

      smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] = local_A[0];

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
          smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = local_B[col];
    }
    else if(warp_id < (WARPS-1))
    {
      local_A[0] = T(0.0);
      smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] =  0.0f;

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
        local_B[col] = 0.0f;

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
        smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = 0.0f;
    }
    ticktock = ticktock == 0 ? 1 : 0;

    if(warp_id == (WARPS-1))
      for(int k = 0; k < batch_size_warps; k++)
      {
        wmma::load_matrix_sync(a_frag, &(smem_A[(ticktock*batch_size_warps + k)*a_tile_offset]), 16); //  111 mu
        wmma::load_matrix_sync(b_frag, &(smem_B[(ticktock*batch_size_warps + k)*b_tile_offset]), 16); // 35 mu
        wmma::mma_sync(c_frag, a_frag, b_frag, c_frag);
      }
  }

  __syncthreads();
  if(warp_id != (WARPS-1)){ return; }
  // only warp_id == (WARPS-1) from here
  int warp_lane = threadIdx.x % 32;

  ticktock = ticktock == 0 ? 1 : 0;
  for(int k = 0; k < batch_size_warps; k++)
  {
    wmma::load_matrix_sync(a_frag, &(smem_A[(ticktock*batch_size_warps + k)*a_tile_offset]), 16); //  111 mu
    wmma::load_matrix_sync(b_frag, &(smem_B[(ticktock*batch_size_warps + k)*b_tile_offset]), 16); // 35 mu
    wmma::mma_sync(c_frag, a_frag, b_frag, c_frag);
  }

  // 129 mu
  if(warp_id == (WARPS-1))
    wmma::store_matrix_sync(&(smem_A[0]), c_frag, 32, wmma::mem_row_major);

  if(col_offset + warp_lane < M)
    out[col_offset + warp_lane] = smem_A[warp_lane];
#endif
}


template <typename T> __device__ void printnonzero(T *A, int num_values, const char * strval)
{
  for(int i = 0; i < num_values; i++)
    if((float)A[i] != 0.0)
      printf("%s %i %f\n", strval, i, (float)A[i]);
}


template <typename T, int THREADS> __global__ void kgemm_4bit_inference(int M, int N, int K, T * __restrict__ const A, unsigned char *B,  float *absmax, T * out,  int lda, int ldb, int ldc, int blocksize)
{

  //// element-wise kernel
  //// 1. Load batch x k into registers
  //// 2. Load k x k into registers
  //// 3. dequantize and store in second pair of k x k
  //// 4. matmul
  //// 5. sum with cub
  //// 6. store outputs
  //// TC kernel
  //// use k warps per thread block
  //// 1. threadblock use read-only cache to read in register tile for A into shared memory
  //// 2. each warp loops over shared memory tiles of A of size 8x16 and loads them into fragments
  //// 3. each warp reads a segment of values 16x32 from B
  //// 4. do dequantization from register of B into second pair of registers
  //// 5. store (4) into fragment
  //// 6. matmul aggregate into fragment C
  //// 7. aggregate files of C into shared memory block C
  //// 8. sum (7)
  //// 9. write outputs to matmul output matrix
#if __CUDA_ARCH__ >= 750
	using namespace nvcuda;
  int col_offset = blockIdx.x *32;
  const int warp_id = threadIdx.x / 32;
  const int warp_idx = threadIdx.x % 32;
  const int half_warp_id = threadIdx.x / 16;
  const int half_warp_lane = threadIdx.x % 16;
  const int batch_size_warps = (WARPS-1)*2;

  T quant_map[16];

  #pragma unroll 16
  for(int i = 0; i < 16; i++)
    quant_map[i] = nf4_data[i];
  //__shared__ T quant_map[16*160];

  T local_A[2];
  T local_B[64];
  unsigned char local_B_4bit[32];


  const int a_tile_offset = 16;
  const int b_tile_offset = (16*32 + 16);

  __shared__ T smem_A[8*16 + (16*(batch_size_warps-1))];
  __shared__ T smem_B[2*batch_size_warps*16*32 + (2*16*(batch_size_warps-1))];
  __shared__ T smem_C[8*32];

   wmma::fragment<wmma::matrix_a, 8, 32, 16, half, wmma::row_major> a_frag;
   wmma::fragment<wmma::matrix_b, 8, 32, 16, half, wmma::col_major> b_frag;
   wmma::fragment<wmma::accumulator, 8, 32, 16, half> c_frag;
   wmma::fill_fragment(c_frag, 0.0f);

  for(int i = threadIdx.x; i < (8*32); i+=blockDim.x)
    smem_C[i] = 0.0f;

  __syncthreads();

  int ticktock = 0;
  int idx = 0 + threadIdx.x;
  int loaded_values = 0;
  // prefetch
  if(idx < K && warp_id < (WARPS-1))
  {
    if(loaded_values == 0)
    {
      local_A[0] = A[idx];
      local_A[1] = A[idx+blockDim.x-32];

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
        local_B_4bit[col] = B[(col_offset+col)*ldb+idx];

      loaded_values = 1;
    }
    else
    {
      local_A[0] = local_A[1];
      loaded_values--;

      #pragma unroll 64
      for(int col = 0; col < 64; col+=2)
      {
        //local_B[col] = dhDequantizeNF4(local_B_4bit[col/2] >> 4)*T(1.0f);
        //local_B[col+1] = dhDequantizeNF4(local_B_4bit[col/2] & 0x0F)*T(1.0f);
        //local_B[col] = d2DequantizeFP4(local_B_4bit[col/2] >> 4)*(float)(17.0);
        //local_B[col+1] = d2DequantizeFP4(local_B_4bit[col/2] & 0x0F)*(float)(17.0);
        //local_B[col] = 127*(local_B_4bit[col/2] >> 4)*(float)(17.0);
        //local_B[col+1] = 127*(local_B_4bit[col/2] & 0x0F)*(float)(17.0);

        //local_B[col] = quant_map[(local_B_4bit[col/2] >> 4)]*T(17.0);
        //local_B[col+1] = quant_map[(local_B_4bit[col/2] & 0x0F)]*T(17.0);
        local_B[col] = quant_map[160*(local_B_4bit[col/2] >> 4)+warp_idx]*T(17.0);
        local_B[col+1] = quant_map[160*(local_B_4bit[col/2] & 0x0F)+warp_idx]*T(17.0);
      }
    }

    smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] = local_A[0];

    #pragma unroll 32
    for(int col = 0; col < 32; col++)
        smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = local_B[col];
  }
  else if(warp_id < (WARPS-1))
  {
    local_A[0] = T(0.0);
    smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] =  0.0f;

    #pragma unroll 32
    for(int col = 0; col < 32; col++)
      local_B[col] = 0.0f;

    #pragma unroll 32
    for(int col = 0; col < 32; col++)
      smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = 0.0f;
  }
  ticktock = ticktock == 0 ? 1 : 0;
    //if(threadIdx.x == 0)
      //printf("aa %i %i\n", idx, loaded_values);

  //for(int base_idx = blockDim.x-32; base_idx < K; base_idx+=blockDim.x-32)
  for(int base_idx = blockDim.x-32; base_idx < K; base_idx+=blockDim.x-32)
  {
    idx = base_idx + threadIdx.x;
    //if(threadIdx.x == 0)
      //printf("%i %i\n", idx, loaded_values);

    //__syncthreads();
    if(idx < K && warp_id < (WARPS-1))
    {
      if(loaded_values == 0)
      {
        local_A[0] = A[idx];
        local_A[1] = A[idx+blockDim.x-32];

        #pragma unroll 32
        for(int col = 0; col < 32; col++)
        {
          local_B_4bit[col] = B[(col_offset+col)*ldb+idx];
          local_B_4bit[col+16] = B[(col_offset+col)*ldb+idx];
        }

        loaded_values = 1;
      }
      else
      {
        local_A[0] = local_A[1];
        loaded_values--;

        int absidx = (idx + col_offset)/blocksize;
        half local_absmax = __ldg(&(absmax[absidx]));

        #pragma unroll 64
        for(int col = 0; col < 64; col+=2)
        {
          //local_B[col] = dhDequantizeNF4(local_B_4bit[col/2] >> 4)*T(absidx);
          //local_B[col+1] = dhDequantizeNF4(local_B_4bit[col/2] & 0x0F)*T(absidx);
          //local_B[col] = T(127)*T(local_B_4bit[col/2] >> 4)*T(absidx);
          //local_B[col+1] = T(127)*T(local_B_4bit[col/2] & 0x0F)*T(absidx);

          //local_B[col] = quant_map[160*(local_B_4bit[col/2] >> 4)+warp_idx]*T(local_absmax);
          //local_B[col+1] = quant_map[160*(local_B_4bit[col/2] & 0x0F)+warp_idx]*T(local_absmax);
          local_B[col] = quant_map[(local_B_4bit[col/2] >> 4)]*T(absidx);
          local_B[col+1] = quant_map[(local_B_4bit[col/2] & 0x0F)]*T(absidx);
        }
        //printnonzero<T>(local_B, 128, "");
      }

      smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] = local_A[0];

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
          smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = local_B[col];
    }
    else if(warp_id < (WARPS-1))
    {
      local_A[0] = T(0.0);
      smem_A[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*a_tile_offset)] =  0.0f;

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
        local_B[col] = 0.0f;

      #pragma unroll 32
      for(int col = 0; col < 32; col++)
        smem_B[half_warp_lane + (((batch_size_warps*ticktock)+half_warp_id)*b_tile_offset) + (col*16)] = 0.0f;
    }
    ticktock = ticktock == 0 ? 1 : 0;

    if(warp_id == (WARPS-1))
      for(int k = 0; k < batch_size_warps; k++)
      {
        wmma::load_matrix_sync(a_frag, &(smem_A[(ticktock*batch_size_warps + k)*a_tile_offset]), 16); //  111 mu
        wmma::load_matrix_sync(b_frag, &(smem_B[(ticktock*batch_size_warps + k)*b_tile_offset]), 16); // 35 mu
        wmma::mma_sync(c_frag, a_frag, b_frag, c_frag);
      }
  }

  __syncthreads();
  //if(threadIdx.x == 0)
  //{
  //  printnonzero<T>(smem_A, 8*16 + (2*16*(batch_size_warps-1)), "A: ");
  //  printnonzero<T>(smem_B, 2*batch_size_warps*16*32 + (2*16*(batch_size_warps-1)), "B: ");
  //}
  if(warp_id != (WARPS-1)){ return; }
  // only warp_id == (WARPS-1) from here
  int warp_lane = threadIdx.x % 32;

  ticktock = ticktock == 0 ? 1 : 0;
  for(int k = 0; k < batch_size_warps; k++)
  {
    //if(warp_lane == 0)
      //printf("%i %i %i %i\n", (ticktock*batch_size_warps + k)*a_tile_offset, k, ticktock, threadIdx.x);
    wmma::load_matrix_sync(a_frag, &(smem_A[(ticktock*batch_size_warps + k)*a_tile_offset]), 16); //  111 mu
    wmma::load_matrix_sync(b_frag, &(smem_B[(ticktock*batch_size_warps + k)*b_tile_offset]), 16); // 35 mu
    wmma::mma_sync(c_frag, a_frag, b_frag, c_frag);
  }

  // 129 mu
  if(warp_id == (WARPS-1))
    wmma::store_matrix_sync(&(smem_C[0]), c_frag, 32, wmma::mem_row_major);

  //printnonzero<T>(smem_C, 32, "");

  if(col_offset + warp_lane < M)
    out[col_offset + warp_lane] = smem_C[warp_lane];
#endif
}

#define num_values_4bit 32
template <typename T, int THREADS, int BITS> __global__ void kgemm_4bit_inference_naive(int M, int N, int K, T * __restrict__ const A, unsigned char *B,  float *absmax, const float *datatype, T * out,  int lda, int ldb, int ldc, int blocksize)
{

  // per threadblock:
  // load step-by-step in chunks of [32,warps]: 1x32 * [32,warps] -> [1,warps]
  // 4 warps -> 4 loads per iter
  // 1x32 * 32x4 -> 1x4 outputs per thread block
  typedef cub::WarpReduce<float> WarpReduce;
  __shared__ typename WarpReduce::TempStorage temp_storage[THREADS/32];

  const int warp_idx = threadIdx.x / 32;
  const int warp_lane = threadIdx.x % 32;
  const int row_B = (THREADS/32)*blockIdx.x + warp_idx;
  const int offset_B = ldb*row_B;
  const int num_values_8bit = num_values_4bit/2;
  float local_C = 0.0f;

  unsigned char local_B_4bit[num_values_8bit];
  T local_B[num_values_4bit/4];
  T local_A[num_values_4bit/4];
  __shared__ T quant_map[16];
	T local_absmax = T(0.0f);

  if (threadIdx.x < 16)
    quant_map[threadIdx.x] = T(__ldg(&datatype[threadIdx.x]));
  //for(int i = threadIdx.x; i < 16; i++)
    //quant_map[i] = T(__ldg(&datatype[i]));
  __syncthreads();

  // A: [1, K]
  // B: [N, K]
  for(int inner_idx = warp_lane*num_values_4bit; inner_idx < K; inner_idx += 32*num_values_4bit)
  {
    const int inner_idx_halved = inner_idx/2;

    // Since blocksize will always be a power-of-2, we avoid more expensive
    // division by the blocksize and instead use a shift operation.
    // This is equivalent to (i+threadId.x*NUM_PER_TH)/blocksize.
    const int absidx = ((2*offset_B)+inner_idx) >> (31 - __clz(blocksize));

    local_absmax = __ldg(&(absmax[absidx]));

    if(row_B < M)
    {
      if((inner_idx_halved + num_values_8bit) < (K/2))
      {
        // this is the most important for performance considerations
        reinterpret_cast<int4(&)[num_values_8bit]>(local_B_4bit)[0] = reinterpret_cast<int4*>(B)[(offset_B+(inner_idx_halved))/(num_values_8bit)];
      }
      else
      {
        #pragma unroll
        for(int j = 0; j < (num_values_8bit); j++)
          if((inner_idx_halved) + j < (K/2))
            local_B_4bit[j] = B[offset_B+inner_idx_halved + j];
          else
            local_B_4bit[j] = 0b01110111;
      }
    }
    else
    {
      #pragma unroll
      for(int j = 0; j < (num_values_8bit); j++)
          local_B_4bit[j] = 0b01110111;
    }

    for(int i = 0; i < 4; i++)
    {
      #pragma unroll
      for(int k = 0; k < num_values_8bit/4; k++)
      {
        #if BNB_BF16_AVAILABLE
          local_B[k*2] = quant_map[local_B_4bit[(i*num_values_8bit/4) + k] >> 4]*local_absmax;
          local_B[k*2 + 1] = quant_map[local_B_4bit[(i*num_values_8bit/4) + k] & 0x0F]*local_absmax;
        #else
          // bf16 multipliation not supported
          local_B[k*2] = T((float)quant_map[local_B_4bit[(i*num_values_8bit/4) + k] >> 4]*(float)local_absmax);
          local_B[k*2 + 1] = T((float)quant_map[local_B_4bit[(i*num_values_8bit/4) + k] & 0x0F]*(float)local_absmax);
        #endif
      }

      if(inner_idx+(num_values_4bit/4) + (i*num_values_4bit/4) < K)
      {
        // this is also relatively important for performance
        if(BITS==16)
        {
          reinterpret_cast<int4(&)[num_values_4bit]>(local_A)[0] = reinterpret_cast<int4*>(A)[inner_idx/(num_values_4bit/4) + i];
        }
        else
        {
          reinterpret_cast<int4(&)[num_values_4bit]>(local_A)[0] = reinterpret_cast<int4*>(A)[inner_idx/(num_values_4bit/8) + (2*i) + 0];
          reinterpret_cast<int4(&)[num_values_4bit]>(local_A)[1] = reinterpret_cast<int4*>(A)[inner_idx/(num_values_4bit/8) + (2*i) + 1];
        }

      }
      else
        #pragma unroll
        for(int k = 0; k < num_values_4bit/4; k++)
          if(inner_idx + (i*num_values_4bit/4) + k < K)
            local_A[k] = A[inner_idx + k + (i*num_values_4bit/4)];
          else
            local_A[k] = T(0.0f);


      // accumulate in float; small performance hit for Ampere, but lower error for outputs
      #pragma unroll
      for(int k = 0; k < num_values_4bit/4; k++)
      {
        #if BNB_BF16_AVAILABLE
          local_C += (float)(local_A[k]*local_B[k]);
        #else
          // bf16 multipliation not supported
          local_C += ((float)local_A[k]*(float)local_B[k]);
        #endif
      }
    }
  }

  local_C = WarpReduce(temp_storage[warp_idx]).Sum(local_C);

  if(row_B < M && warp_lane == 0)
    out[row_B] = T(local_C);

}

template <typename T, int FUNC> __global__ void kfunc(T *A, T *B, T value, long n)
{
  for(long i = (blockDim.x*blockIdx.x) + threadIdx.x; i < n; i+=(blockDim.x*gridDim.x))
  {
    switch(FUNC)
    {
      case FILL:
        A[i] = (T)value;
        break;
      case ARANGE:
        A[i] = (T)i;
        break;
      case _MUL:
        A[i] = A[i]*B[i];
        break;
    }
  }
}


//==============================================================
//                   TEMPLATE DEFINITIONS
//==============================================================

template __global__ void kfunc<float, FILL>(float *A, float *B, float value, long n);
template __global__ void kfunc<unsigned char, FILL>(unsigned char *A, unsigned char *B, unsigned char value, long n);
template __global__ void kfunc<float, ARANGE>(float *A, float *B, float value, long n);
template __global__ void kfunc<float, _MUL>(float *A, float *B, float value, long n);

// these are not used and make no sense, but the compiler needs them
//template __global__ void gemm_device<float, 16, 128>(int M, int N, int K, float * __restrict__ const A,  float* B,  float * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 256>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 192>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 160>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 128>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
//template __global__ void gemm_device<float, 16, 32>(int M, int N, int K, float * __restrict__ const A,  float* B,  float * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 32>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 64>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 32, 96>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
// these are not used and make no sense, but the compiler needs them

//template __global__ void gemm_device<float, 32, 128>(int M, int N, int K, float * __restrict__ const A,  float* B,  float * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 256>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 192>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 160>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 128>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
//template __global__ void gemm_device<float, 32, 32>(int M, int N, int K, float * __restrict__ const A,  float* B,  float * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 32>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 64>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);
template __global__ void gemm_device<half, 16, 96>(int M, int N, int K, half * __restrict__ const A,  half* B,  half * out,  int lda, int ldb, int ldc);

template __global__ void kgemm_4bit_inference<half, 96>(int M, int N, int K, half * __restrict__ const A, unsigned char *B,  float *absmax, half * out,  int lda, int ldb, int ldc, int blocksize);
template __global__ void kgemm_4bit_inference<half, 128>(int M, int N, int K, half * __restrict__ const A, unsigned char *B,  float *absmax, half * out,  int lda, int ldb, int ldc, int blocksize);
template __global__ void kgemm_4bit_inference<half, 160>(int M, int N, int K, half * __restrict__ const A, unsigned char *B,  float *absmax, half * out,  int lda, int ldb, int ldc, int blocksize);
template __global__ void kgemm_4bit_inference<half, 256>(int M, int N, int K, half * __restrict__ const A, unsigned char *B,  float *absmax, half * out,  int lda, int ldb, int ldc, int blocksize);

template __global__ void kgemm_4bit_inference_naive<half, 128, 16>(int M, int N, int K, half * __restrict__ const A, unsigned char *B,  float *absmax, const float *datatype, half * out,  int lda, int ldb, int ldc, int blocksize);
template __global__ void kgemm_4bit_inference_naive<__nv_bfloat16, 128, 16>(int M, int N, int K, __nv_bfloat16 * __restrict__ const A, unsigned char *B,  float *absmax, const float *datatype, __nv_bfloat16 * out,  int lda, int ldb, int ldc, int blocksize);
template __global__ void kgemm_4bit_inference_naive<float, 128, 32>(int M, int N, int K, float * __restrict__ const A, unsigned char *B,  float *absmax, const float *datatype, float * out,  int lda, int ldb, int ldc, int blocksize);

template __global__ void kspmm_coo_very_sparse_naive<half, 8, 16>(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, half *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB);
template __global__ void kspmm_coo_very_sparse_naive<half, 16, 16>(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, half *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB);
template __global__ void kspmm_coo_very_sparse_naive<half, 32, 16>(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, half *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB);
template __global__ void kspmm_coo_very_sparse_naive<signed char, 8, 8>(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, signed char *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB);
template __global__ void kspmm_coo_very_sparse_naive<signed char, 16, 8>(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, signed char *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB);
template __global__ void kspmm_coo_very_sparse_naive<signed char, 32, 8>(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, signed char *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB);

template __global__ void kdequant_mm_int32_fp16<4, 512>(int *__restrict__ const A, float *__restrict__ const rowStats, float *__restrict__ const colStats, half *out, half * __restrict__ const bias, const int numRows, const int numCols, const int n);

template __device__ unsigned char dQuantize<0>(float* smem_code, const float rand, float x);
template __device__ unsigned char dQuantize<1>(float* smem_code, const float rand, float x);

#define MAKE_PreconditionOptimizer32bit1State(oname, gtype) \
template __global__ void kPreconditionOptimizer32bit1State<gtype, oname, 4096, 8>(gtype* g, gtype* p, \
                float* state1, float *unorm, \
                const float beta1, const float beta2, const float eps, const float weight_decay, \
                const int step, const float lr, const float gnorm_scale, const int n); \

MAKE_PreconditionOptimizer32bit1State(MOMENTUM, half)
MAKE_PreconditionOptimizer32bit1State(MOMENTUM, float)
MAKE_PreconditionOptimizer32bit1State(MOMENTUM, __nv_bfloat16)
MAKE_PreconditionOptimizer32bit1State(RMSPROP, half)
MAKE_PreconditionOptimizer32bit1State(RMSPROP, float)
MAKE_PreconditionOptimizer32bit1State(RMSPROP, __nv_bfloat16)
MAKE_PreconditionOptimizer32bit1State(LION, half)
MAKE_PreconditionOptimizer32bit1State(LION, float)
MAKE_PreconditionOptimizer32bit1State(LION, __nv_bfloat16)
MAKE_PreconditionOptimizer32bit1State(ADAGRAD, half)
MAKE_PreconditionOptimizer32bit1State(ADAGRAD, float)
MAKE_PreconditionOptimizer32bit1State(ADAGRAD, __nv_bfloat16)

#define MAKE_Optimizer32bit1State(oname, gtype) \
template __global__ void kOptimizer32bit1State<gtype, oname>(gtype* g, gtype* p, float* state1, float *unorm, const float max_unorm, const float param_norm, \
    const float beta1, const float beta2, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n); \

MAKE_Optimizer32bit1State(MOMENTUM, half)
MAKE_Optimizer32bit1State(MOMENTUM, float)
MAKE_Optimizer32bit1State(MOMENTUM, __nv_bfloat16)
MAKE_Optimizer32bit1State(RMSPROP, half)
MAKE_Optimizer32bit1State(RMSPROP, float)
MAKE_Optimizer32bit1State(RMSPROP, __nv_bfloat16)
MAKE_Optimizer32bit1State(LION, half)
MAKE_Optimizer32bit1State(LION, float)
MAKE_Optimizer32bit1State(LION, __nv_bfloat16)
MAKE_Optimizer32bit1State(ADAGRAD, half)
MAKE_Optimizer32bit1State(ADAGRAD, float)
MAKE_Optimizer32bit1State(ADAGRAD, __nv_bfloat16)

#define MAKE_PreconditionOptimizer32bit2State(oname, gtype) \
template __global__ void kPreconditionOptimizer32bit2State<gtype, oname, 4096, 8>(gtype* g, gtype* p,  \
                float* state1, float* state2, float *unorm, \
                const float beta1, const float beta2, const float eps, const float weight_decay, \
                const int step, const float lr, const float gnorm_scale, const int n); \

MAKE_PreconditionOptimizer32bit2State(ADAM, float)
MAKE_PreconditionOptimizer32bit2State(ADAM, half)
MAKE_PreconditionOptimizer32bit2State(ADAM, __nv_bfloat16)
MAKE_PreconditionOptimizer32bit2State(ADEMAMIX, float)
MAKE_PreconditionOptimizer32bit2State(ADEMAMIX, half)
MAKE_PreconditionOptimizer32bit2State(ADEMAMIX, __nv_bfloat16)

template __global__ void kOptimizer32bit2State<float, ADAM>(float* g, float* p, float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
    const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n);
template __global__ void kOptimizer32bit2State<half, ADAM>(half* g, half* p, float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
    const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n);
template __global__ void kOptimizer32bit2State<__nv_bfloat16, ADAM>(__nv_bfloat16* g, __nv_bfloat16* p, float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
    const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n);
template __global__ void kOptimizer32bit2State<float, ADEMAMIX>(float* g, float* p, float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
    const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n);
template __global__ void kOptimizer32bit2State<half, ADEMAMIX>(half* g, half* p, float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
    const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n);
template __global__ void kOptimizer32bit2State<__nv_bfloat16, ADEMAMIX>(__nv_bfloat16* g, __nv_bfloat16* p, float* state1, float* state2, float *unorm, const float max_unorm, const float param_norm,
    const float beta1, const float beta2, const float beta3, const float alpha, const float eps, const float weight_decay,const int step, const float lr, const float gnorm_scale, const bool skip_zeros, const int n);


#define MAKE_PreconditionStatic8bit1State(oname, gtype) \
template __global__ void kPreconditionOptimizerStatic8bit1State<gtype, oname>(gtype* p, gtype* __restrict__ const g, unsigned char*__restrict__  const state1,  \
                float *unorm,  \
                const float beta1,  \
                const float beta2,  \
                const float eps, const int step,  \
                float* __restrict__ const quantiles1,  \
                float* max1, float* new_max1,  \
                const float weight_decay, \
                const float gnorm_scale,  \
                const int n); \

MAKE_PreconditionStatic8bit1State(MOMENTUM, half)
MAKE_PreconditionStatic8bit1State(MOMENTUM, float)
MAKE_PreconditionStatic8bit1State(RMSPROP, half)
MAKE_PreconditionStatic8bit1State(RMSPROP, float)
MAKE_PreconditionStatic8bit1State(LION, half)
MAKE_PreconditionStatic8bit1State(LION, float)
MAKE_PreconditionStatic8bit1State(ADAGRAD, half)
MAKE_PreconditionStatic8bit1State(ADAGRAD, float)

#define MAKE_optimizerStatic8bit1State(oname, gtype) \
template __global__ void kOptimizerStatic8bit1State<gtype, oname>(gtype* p, gtype* const g, unsigned char* state1,  \
                const float *unorm, const float max_unorm, const float param_norm, \
                const float beta1,  \
                const float beta2,  \
                const float eps, const int step, const float lr, \
                float* __restrict__ const quantiles1,  \
                float* max1, float* new_max1,  \
                float weight_decay, \
                const float gnorm_scale,  \
                const int n); \

MAKE_optimizerStatic8bit1State(MOMENTUM, half)
MAKE_optimizerStatic8bit1State(MOMENTUM, float)
MAKE_optimizerStatic8bit1State(RMSPROP, half)
MAKE_optimizerStatic8bit1State(RMSPROP, float)
MAKE_optimizerStatic8bit1State(LION, half)
MAKE_optimizerStatic8bit1State(LION, float)
MAKE_optimizerStatic8bit1State(ADAGRAD, half)
MAKE_optimizerStatic8bit1State(ADAGRAD, float)


#define MAKE_PreconditionStatic8bit2State(oname, gtype) \
template __global__ void kPreconditionOptimizerStatic8bit2State<gtype, oname>(gtype* p, gtype* __restrict__ const g, unsigned char*__restrict__  const state1, unsigned char* __restrict__ const state2, \
                float *unorm, \
                const float beta1, const float beta2, \
                const float eps, const int step,  \
                float* __restrict__ const quantiles1, float* __restrict__ const quantiles2, \
                float* max1, float* max2, float* new_max1, float* new_max2, \
                const float gnorm_scale,  \
                const int n); \

MAKE_PreconditionStatic8bit2State(ADAM, half)
MAKE_PreconditionStatic8bit2State(ADAM, float)

#define MAKE_optimizerStatic8bit2State(oname, gtype) \
template __global__ void kOptimizerStatic8bit2State<gtype, oname>(gtype* p, gtype* const g, unsigned char* state1, unsigned char* state2, \
                const float *unorm, const float max_unorm, const float param_norm, \
                const float beta1, const float beta2, \
                const float eps, const int step, const float lr, \
                float* __restrict__ const quantiles1, float* __restrict__ const quantiles2, \
                float* max1, float* max2, float* new_max1, float* new_max2, \
                float weight_decay, \
                const float gnorm_scale,  \
                const int n); \

MAKE_optimizerStatic8bit2State(ADAM, half)
MAKE_optimizerStatic8bit2State(ADAM, float)

template __global__ void kPercentileClipping<float, 2048, 4>(float * __restrict__ g, float *gnorm_vec, int step, const int n);
template __global__ void kPercentileClipping<half, 2048, 4>(half * __restrict__ g, float *gnorm_vec, int step, const int n);

#define MAKE_kQuantizeBlockwise(dtype, blocksize, num_per_thread, stochastic, data_type_name) \
template __global__ void kQuantizeBlockwise<dtype, blocksize, num_per_thread, stochastic, data_type_name>(float * code, dtype * __restrict__ const A, float *absmax, unsigned char *out, float * __restrict__ const rand, const int rand_offset, const int n); \

MAKE_kQuantizeBlockwise(half,  4096, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(half,  4096, 4, 1, General8bit)
MAKE_kQuantizeBlockwise(half,  2048, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(half,  1024, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(half,   512, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(half,   256, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(half,   128, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(half,    64, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(half,  4096, 4, 0, FP4)
MAKE_kQuantizeBlockwise(half,  2048, 4, 0, FP4)
MAKE_kQuantizeBlockwise(half,  1024, 4, 0, FP4)
MAKE_kQuantizeBlockwise(half,   512, 2, 0, FP4)
MAKE_kQuantizeBlockwise(half,   256, 2, 0, FP4)
MAKE_kQuantizeBlockwise(half,   128, 2, 0, FP4)
MAKE_kQuantizeBlockwise(half,    64, 2, 0, FP4)
MAKE_kQuantizeBlockwise(half,  4096, 4, 0, NF4)
MAKE_kQuantizeBlockwise(half,  2048, 4, 0, NF4)
MAKE_kQuantizeBlockwise(half,  1024, 4, 0, NF4)
MAKE_kQuantizeBlockwise(half,   512, 2, 0, NF4)
MAKE_kQuantizeBlockwise(half,   256, 2, 0, NF4)
MAKE_kQuantizeBlockwise(half,   128, 2, 0, NF4)
MAKE_kQuantizeBlockwise(half,    64, 2, 0, NF4)
MAKE_kQuantizeBlockwise(float, 4096, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(float, 4096, 4, 1, General8bit)
MAKE_kQuantizeBlockwise(float, 2048, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(float, 1024, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(float,  512, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(float,  256, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(float,  128, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(float,   64, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(float, 4096, 4, 0, FP4)
MAKE_kQuantizeBlockwise(float, 2048, 4, 0, FP4)
MAKE_kQuantizeBlockwise(float, 1024, 4, 0, FP4)
MAKE_kQuantizeBlockwise(float,  512, 2, 0, FP4)
MAKE_kQuantizeBlockwise(float,  256, 2, 0, FP4)
MAKE_kQuantizeBlockwise(float,  128, 2, 0, FP4)
MAKE_kQuantizeBlockwise(float,   64, 2, 0, FP4)
MAKE_kQuantizeBlockwise(float, 4096, 4, 0, NF4)
MAKE_kQuantizeBlockwise(float, 2048, 4, 0, NF4)
MAKE_kQuantizeBlockwise(float, 1024, 4, 0, NF4)
MAKE_kQuantizeBlockwise(float,  512, 2, 0, NF4)
MAKE_kQuantizeBlockwise(float,  256, 2, 0, NF4)
MAKE_kQuantizeBlockwise(float,  128, 2, 0, NF4)
MAKE_kQuantizeBlockwise(float,   64, 2, 0, NF4)

MAKE_kQuantizeBlockwise(__nv_bfloat16, 4096, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 4096, 4, 1, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 2048, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 1024, 4, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  512, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  256, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  128, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16,   64, 2, 0, General8bit)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 4096, 4, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 2048, 4, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 1024, 4, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  512, 2, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  256, 2, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  128, 2, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,   64, 2, 0, FP4)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 4096, 4, 0, NF4)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 2048, 4, 0, NF4)
MAKE_kQuantizeBlockwise(__nv_bfloat16, 1024, 4, 0, NF4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  512, 2, 0, NF4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  256, 2, 0, NF4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,  128, 2, 0, NF4)
MAKE_kQuantizeBlockwise(__nv_bfloat16,   64, 2, 0, NF4)

template __global__ void kDequantizeBlockwise<half, 512, 64, 8, FP4>(float *code, unsigned char * A, float * absmax, half *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<half, 512, 64, 8, General8bit>(float *code, unsigned char * A, float * absmax, half *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<half, 512, 64, 8, NF4>(float *code, unsigned char * A, float * absmax, half *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<float, 512, 64, 8, FP4>(float *code, unsigned char * A, float * absmax, float *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<float, 512, 64, 8, General8bit>(float *code, unsigned char * A, float * absmax, float *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<float, 512, 64, 8, NF4>(float *code, unsigned char * A, float * absmax, float *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<__nv_bfloat16, 512, 64, 8, FP4>(float *code, unsigned char * A, float * absmax, __nv_bfloat16 *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<__nv_bfloat16, 512, 64, 8, General8bit>(float *code, unsigned char * A, float * absmax, __nv_bfloat16 *out, const int blocksize, const int n);
template __global__ void kDequantizeBlockwise<__nv_bfloat16, 512, 64, 8, NF4>(float *code, unsigned char * A, float * absmax, __nv_bfloat16 *out, const int blocksize, const int n);

#define MAKE_OptimizerStatic8bit2StateBlockwise(oname, gtype, block_size, num_per_thread) \
template __global__ void kOptimizerStatic8bit2StateBlockwise<gtype, oname, block_size, num_per_thread>(gtype* p, gtype* __restrict__ const g, unsigned char* state1, unsigned char* state2, \
                const float beta1, const float beta2, const float beta3, const float alpha, \
                const float eps, const int step, const float lr, \
                float* __restrict__ const quantiles1, float* __restrict__ const quantiles2, \
                float* absmax1, float* absmax2,  \
                float weight_decay, \
                const float gnorm_scale, const bool skip_zeros, const int n); \

MAKE_OptimizerStatic8bit2StateBlockwise(ADAM, float, 256, 1)
MAKE_OptimizerStatic8bit2StateBlockwise(ADAM, half, 256, 1)
MAKE_OptimizerStatic8bit2StateBlockwise(ADAM, __nv_bfloat16, 256, 1)
MAKE_OptimizerStatic8bit2StateBlockwise(ADEMAMIX, float, 256, 1)
MAKE_OptimizerStatic8bit2StateBlockwise(ADEMAMIX, half, 256, 1)
MAKE_OptimizerStatic8bit2StateBlockwise(ADEMAMIX, __nv_bfloat16, 256, 1)

#define MAKE_OptimizerStatic8bit1StateBlockwise(oname, gtype, block_size, num_per_thread) \
template __global__ void kOptimizerStatic8bit1StateBlockwise<gtype, oname, block_size, num_per_thread>( \
		gtype* p, gtype* __restrict__ const g, unsigned char* state1, \
                const float beta1, const float beta2, \
                const float eps, const int step, const float lr, \
                float* __restrict__ const quantiles1, \
                float* absmax1, \
                float weight_decay, \
                const float gnorm_scale, const bool skip_zeros, const int n); \

MAKE_OptimizerStatic8bit1StateBlockwise(MOMENTUM, float, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(MOMENTUM, half, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(MOMENTUM, __nv_bfloat16, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(RMSPROP, float, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(RMSPROP, half, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(RMSPROP, __nv_bfloat16, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(LION, float, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(LION, half, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(LION, __nv_bfloat16, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(ADAGRAD, float, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(ADAGRAD, half, 256, 1)
MAKE_OptimizerStatic8bit1StateBlockwise(ADAGRAD, __nv_bfloat16, 256, 1)

template __device__ void printnonzero<float>(float *A, int num_values, const char*strval);
template __device__ void printnonzero<half>(half *A, int num_values, const char*strval);