1 /* 2 * Copyright (c) 2017-2021 Arm Limited. 3 * 4 * SPDX-License-Identifier: MIT 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in all 14 * copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 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: GemvBatched(const GemmArgs & args)39 GemvBatched(const GemmArgs &args) { 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 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)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 get_window_size() const59 ndrange_t get_window_size() const override { 60 return _subgemm->get_window_size(); 61 } 62 set_nthreads(int nthreads)63 void set_nthreads(int nthreads) override { 64 _subgemm->set_nthreads(nthreads); 65 } 66 execute(const ndcoord_t & work_range,const ndcoord_t & thread_locator,int threadid)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 get_working_size() const71 size_t get_working_size() const override { 72 return _subgemm->get_working_size(); 73 } 74 set_working_space(void * space)75 void set_working_space(void *space) override { 76 _subgemm->set_working_space(space); 77 } 78 B_is_pretransposed() const79 bool B_is_pretransposed() const override { 80 return _subgemm->B_is_pretransposed(); 81 } 82 B_pretranspose_required() const83 bool B_pretranspose_required() const override { 84 return _subgemm->B_pretranspose_required(); 85 } 86 get_B_pretransposed_array_size() const87 size_t get_B_pretransposed_array_size() const override { 88 return _subgemm->get_B_pretransposed_array_size(); 89 } 90 pretranspose_B_array(void * buffer,const To * B,const int ldb,const int B_multi_stride)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 set_pretransposed_B_data(void * buffer)95 void set_pretransposed_B_data(void *buffer) override { 96 _subgemm->set_pretransposed_B_data(buffer); 97 } 98 get_config()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 113