#include <stdio.h> #include <assert.h> #include "ATen/ATen.h" typedef at::BFloat16 bf16; typedef at::Half fp16; typedef float fp32; template <typename F> __global__ void kernel_forward(const int B, const int T, const int C, const int H, float *__restrict__ _state, const F *__restrict__ const _r, const F *__restrict__ const _k, const F *__restrict__ const _v, const float *__restrict__ _w, const F *__restrict__ _u, F *__restrict__ const _y) { const int b = blockIdx.x / H; const int h = blockIdx.x % H; const int i = threadIdx.x; _u += h*_N_; _state += h*_N_*_N_ + i*_N_; // wrong if B > 1 !!! __shared__ float r[_N_], k[_N_], u[_N_], w[_N_]; float state[_N_]; #pragma unroll for (int j = 0; j < _N_; j++) state[j] = _state[j]; __syncthreads(); u[i] = float(_u[i]); __syncthreads(); for (int t = b*T*C + h*_N_ + i; t < (b+1)*T*C + h*_N_ + i; t += C) { __syncthreads(); w[i] = _w[t]; r[i] = float(_r[t]); k[i] = float(_k[t]); __syncthreads(); const float v = float(_v[t]); float y = 0; #pragma unroll for (int j = 0; j < _N_; j+=4) { const float4& r_ = (float4&)(r[j]); const float4& k_ = (float4&)(k[j]); const float4& w_ = (float4&)(w[j]); const float4& u_ = (float4&)(u[j]); float4& s = (float4&)(state[j]); float4 x; x.x = k_.x * v; x.y = k_.y * v; x.z = k_.z * v; x.w = k_.w * v; y += r_.x * (u_.x * x.x + s.x); y += r_.y * (u_.y * x.y + s.y); y += r_.z * (u_.z * x.z + s.z); y += r_.w * (u_.w * x.w + s.w); s.x = s.x * w_.x + x.x; s.y = s.y * w_.y + x.y; s.z = s.z * w_.z + x.z; s.w = s.w * w_.w + x.w; } _y[t] = F(y); } #pragma unroll for (int j = 0; j < _N_; j++) _state[j] = state[j]; } void cuda_forward_bf16(int B, int T, int C, int H, float *state, bf16 *r, bf16 *k, bf16 *v, float *w, bf16 *u, bf16 *y) { assert(H*_N_ == C); kernel_forward<<<dim3(B * H), dim3(_N_)>>>(B, T, C, H, state, r, k, v, w, u, y); } void cuda_forward_fp16(int B, int T, int C, int H, float *state, fp16 *r, fp16 *k, fp16 *v, float *w, fp16 *u, fp16 *y) { assert(H*_N_ == C); kernel_forward<<<dim3(B * H), dim3(_N_)>>>(B, T, C, H, state, r, k, v, w, u, y); } void cuda_forward_fp32(int B, int T, int C, int H, float *state, fp32 *r, fp32 *k, fp32 *v, float *w, fp32 *u, fp32 *y) { assert(H*_N_ == C); kernel_forward<<<dim3(B * H), dim3(_N_)>>>(B, T, C, H, state, r, k, v, w, u, y); }