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1 // Copyright 2008 Google Inc. All Rights Reserved.
2 
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 
7 //      http://www.apache.org/licenses/LICENSE-2.0
8 
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef STRESSAPPTEST_ADLER32MEMCPY_H_
16 #define STRESSAPPTEST_ADLER32MEMCPY_H_
17 
18 #include <string>
19 #include "sattypes.h"
20 
21 // Encapsulation for Adler checksum. Please see adler32memcpy.cc for more
22 // detail on the adler checksum algorithm.
23 class AdlerChecksum {
24  public:
AdlerChecksum()25   AdlerChecksum() {}
~AdlerChecksum()26   ~AdlerChecksum() {}
27   // Returns true if the checksums are equal.
28   bool Equals(const AdlerChecksum &other) const;
29   // Returns string representation of the Adler checksum
30   string ToHexString() const;
31   // Sets components of the Adler checksum.
32   void Set(uint64 a1, uint64 a2, uint64 b1, uint64 b2);
33 
34  private:
35   // Components of Adler checksum.
36   uint64 a1_, a2_, b1_, b2_;
37 
38   DISALLOW_COPY_AND_ASSIGN(AdlerChecksum);
39 };
40 
41 // Calculates Adler checksum for supplied data.
42 bool CalculateAdlerChecksum(uint64 *data64, unsigned int size_in_bytes,
43                             AdlerChecksum *checksum);
44 
45 // C implementation of Adler memory copy.
46 bool AdlerMemcpyC(uint64 *dstmem64, uint64 *srcmem64,
47                     unsigned int size_in_bytes, AdlerChecksum *checksum);
48 
49 // C implementation of Adler memory copy with some float point ops,
50 // attempting to warm up the CPU.
51 bool AdlerMemcpyWarmC(uint64 *dstmem64, uint64 *srcmem64,
52                       unsigned int size_in_bytes, AdlerChecksum *checksum);
53 
54 // x86_64 SSE2 assembly implementation of fast and stressful Adler memory copy.
55 bool AdlerMemcpyAsm(uint64 *dstmem64, uint64 *srcmem64,
56                     unsigned int size_in_bytes, AdlerChecksum *checksum);
57 
58 
59 #endif  // STRESSAPPTEST_ADLER32MEMCPY_H_
60