Compute Library
 22.11
gemv_batched.hpp
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24 #pragma once
25 
26 #include "arm_gemm.hpp"
27 
28 namespace arm_gemm {
29 
30 /* "Batched GEMV" (where M=1 and nbatches>1) can be executed much more
31  * efficiently as a GEMM (with M'=nbatches and nbatches'=1). This wrapper
32  * implements this. */
33 template<typename To, typename Tr>
34 class GemvBatched : public GemmCommon<To, Tr> {
35 private:
36  UniqueGemmCommon<To, Tr> _subgemm = nullptr;
37 
38 public:
40  /* Just create a subgemm with batches->M */
41  GemmArgs newargs = args;
42  newargs._Msize = args._nbatches;
43  newargs._nbatches = 1;
44  newargs._cfg = nullptr;
45  _subgemm = gemm<To,Tr>(newargs);
46  }
47 
48  void set_arrays(const To *A, const int, const int A_batch_stride, const int A_multi_stride,
49  const To *B, const int ldb, const int B_multi_stride,
50  Tr *C, const int, const int C_batch_stride, const int C_multi_stride,
51  const Tr *bias, const int bias_multi_stride) override {
52  /* A and C's batch stride becomes their new row stride. New batch stride is 0 as nbatches for subgemm is always 1. */
53  _subgemm->set_arrays(A, A_batch_stride, 0, A_multi_stride,
54  B, ldb, B_multi_stride,
55  C, C_batch_stride, 0, C_multi_stride,
56  bias, bias_multi_stride);
57  }
58 
59  ndrange_t get_window_size() const override {
60  return _subgemm->get_window_size();
61  }
62 
63  void set_nthreads(int nthreads) override {
64  _subgemm->set_nthreads(nthreads);
65  }
66 
67  void execute(const ndcoord_t &work_range, const ndcoord_t &thread_locator, int threadid) override {
68  _subgemm->execute(work_range, thread_locator, threadid);
69  }
70 
71  size_t get_working_size() const override {
72  return _subgemm->get_working_size();
73  }
74 
75  void set_working_space(void *space) override {
76  _subgemm->set_working_space(space);
77  }
78 
79  bool B_is_pretransposed() const override {
80  return _subgemm->B_is_pretransposed();
81  }
82 
83  bool B_pretranspose_required() const override {
84  return _subgemm->B_pretranspose_required();
85  }
86 
87  size_t get_B_pretransposed_array_size() const override {
88  return _subgemm->get_B_pretransposed_array_size();
89  }
90 
91  void pretranspose_B_array(void *buffer, const To *B, const int ldb, const int B_multi_stride) override {
92  _subgemm->pretranspose_B_array(buffer, B, ldb, B_multi_stride);
93  }
94 
95  void set_pretransposed_B_data(void *buffer) override {
96  _subgemm->set_pretransposed_B_data(buffer);
97  }
98 
99  GemmConfig get_config() override {
100  GemmConfig c = _subgemm->get_config();
101 
102  std::string new_filter = "gemv_batched[";
103  new_filter.append(c.filter);
104  new_filter.append("]");
105 
106  c.filter = new_filter;
107 
108  return c;
109  }
110 };
111 
112 } // namespace arm_gemm
void set_nthreads(int nthreads) override
void execute(const ndcoord_t &work_range, const ndcoord_t &thread_locator, int threadid) override
Main execute member fucntion.
void set_pretransposed_B_data(void *buffer) override
void pretranspose_B_array(void *buffer, const To *B, const int ldb, const int B_multi_stride) override
const GemmConfig * _cfg
Definition: arm_gemm.hpp:157
bool B_pretranspose_required() const override
size_t get_B_pretransposed_array_size() const override
GemvBatched(const GemmArgs &args)
unsigned int _Msize
Definition: arm_gemm.hpp:146
void set_working_space(void *space) override
std::unique_ptr< GemmCommon< Top, Tret > > UniqueGemmCommon
Definition: arm_gemm.hpp:216
void set_arrays(const To *A, const int, const int A_batch_stride, const int A_multi_stride, const To *B, const int ldb, const int B_multi_stride, Tr *C, const int, const int C_batch_stride, const int C_multi_stride, const Tr *bias, const int bias_multi_stride) override
bool B_is_pretransposed() const override
size_t get_working_size() const override
ndrange_t get_window_size() const override
NDCoordinate builds upon a range, but specifies a starting position in addition to a size which it in...
Definition: ndrange.hpp:151
std::string filter
Definition: arm_gemm.hpp:109
GemmConfig get_config() override
unsigned int _nbatches
Definition: arm_gemm.hpp:150
const int32_t * bias