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1 | // Licensed to the Apache Software Foundation (ASF) under one |
2 | // or more contributor license agreements. See the NOTICE file | |
3 | // distributed with this work for additional information | |
4 | // regarding copyright ownership. The ASF licenses this file | |
5 | // to you under the Apache License, Version 2.0 (the | |
6 | // "License"); you may not use this file except in compliance | |
7 | // with the License. You may obtain a copy of the License at | |
8 | // | |
9 | // http://www.apache.org/licenses/LICENSE-2.0 | |
10 | // | |
11 | // Unless required by applicable law or agreed to in writing, software | |
12 | // distributed under the License is distributed on an "AS IS" BASIS, | |
13 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | // See the License for the specific language governing permissions and | |
15 | // limitations under the License. | |
16 | ||
17 | // +build !noasm | |
18 | ||
19 | package memory | |
20 | ||
21 | import "unsafe" | |
22 | ||
23 | //go:noescape | |
24 | func _memset_avx2(buf unsafe.Pointer, len, c uintptr) | |
25 | ||
26 | func memory_memset_avx2(buf []byte, c byte) { | |
27 | if len(buf) == 0 { | |
28 | return | |
29 | } | |
30 | ||
31 | var ( | |
32 | p1 = unsafe.Pointer(&buf[0]) | |
33 | p2 = uintptr(len(buf)) | |
34 | p3 = uintptr(c) | |
35 | ) | |
36 | if len(buf) > 2000 || isMultipleOfPowerOf2(len(buf), 256) { | |
37 | _memset_avx2(p1, p2, p3) | |
38 | } else { | |
39 | _memset_sse4(p1, p2, p3) | |
40 | } | |
41 | } |