1 | /******************************************************************************* |
2 | * Copyright 2021-2022 Intel Corporation |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | *******************************************************************************/ |
16 | |
17 | #ifndef GPU_JIT_CODEGEN_BANK_CONFLICT_ALLOCATION_HPP |
18 | #define GPU_JIT_CODEGEN_BANK_CONFLICT_ALLOCATION_HPP |
19 | |
20 | #include "gpu/jit/codegen/reg_buf.hpp" |
21 | #include "gpu/jit/codegen/register_allocator.hpp" |
22 | #include "gpu/jit/ir/ir.hpp" |
23 | #include "gpu/jit/ngen/ngen.hpp" |
24 | |
25 | namespace dnnl { |
26 | namespace impl { |
27 | namespace gpu { |
28 | namespace jit { |
29 | |
30 | // Stores a set of register buffers that are allocated based on their usages |
31 | // to avoid bank and bundle conflicts. |
32 | class bank_conflict_allocation_t { |
33 | public: |
34 | bank_conflict_allocation_t() = default; |
35 | bank_conflict_allocation_t(reg_allocator_t &ra) : refs_(1), ra_(&ra) {} |
36 | |
37 | bool is_empty() const { return !ra_; } |
38 | |
39 | int refs() const { return refs_; } |
40 | |
41 | void retain() { |
42 | ir_assert(refs_ > 0); |
43 | refs_++; |
44 | } |
45 | |
46 | void release(const expr_t &buf) { |
47 | ir_assert(refs_ > 0); |
48 | refs_--; |
49 | auto it = buf_map_.find(buf); |
50 | ir_assert(it != buf_map_.end()) << "Buffer not found: " << buf; |
51 | it->second.release(*ra_); |
52 | buf_map_.erase(it); |
53 | } |
54 | |
55 | const reg_buf_t &get_reg_buf(const expr_t &buf) const { |
56 | return buf_map_.at(buf); |
57 | } |
58 | |
59 | void set_reg_buf(const expr_t &buf, const reg_buf_t ®_buf) { |
60 | auto ret = buf_map_.emplace(buf, reg_buf); |
61 | reg_buf.claim(*ra_); |
62 | ir_assert(ret.second) << "Buffer already exists: " << buf; |
63 | } |
64 | |
65 | static bank_conflict_allocation_t create( |
66 | reg_allocator_t &ra, int regs, const bank_conflict_attr_t &_attr); |
67 | |
68 | private: |
69 | int refs_ = 0; |
70 | reg_allocator_t *ra_ = nullptr; |
71 | object_map_t<expr_t, reg_buf_t> buf_map_; |
72 | }; |
73 | |
74 | } // namespace jit |
75 | } // namespace gpu |
76 | } // namespace impl |
77 | } // namespace dnnl |
78 | |
79 | #endif |
80 | |