1 // Copyright 2019, VIXL authors
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are met:
6 //
7 // * Redistributions of source code must retain the above copyright notice,
8 // this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above copyright notice,
10 // this list of conditions and the following disclaimer in the documentation
11 // and/or other materials provided with the distribution.
12 // * Neither the name of ARM Limited nor the names of its contributors may be
13 // used to endorse or promote products derived from this software without
14 // specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
17 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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23 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 #include "bench-utils.h"
28 #include "globals-vixl.h"
29
30 #include "aarch64/instructions-aarch64.h"
31 #include "aarch64/macro-assembler-aarch64.h"
32
33 using namespace vixl;
34 using namespace vixl::aarch64;
35
36 // This program focuses on emitting simple instructions.
37 //
38 // This code will emit a given number of 'add x0, x1, x2' in a fixed size
39 // buffer, looping over the buffer if necessary. This code therefore focuses
40 // on Emit and Operand.
main(int argc, char* argv[])41 int main(int argc, char* argv[]) {
42 BenchCLI cli(argc, argv);
43 if (cli.ShouldExitEarly()) return cli.GetExitCode();
44
45 const size_t buffer_size = 256 * KBytes;
46 const size_t buffer_instruction_count = buffer_size / kInstructionSize;
47 MacroAssembler masm(buffer_size);
48
49 BenchTimer timer;
50
51 size_t iterations = 0;
52 do {
53 masm.Reset();
54 {
55 ExactAssemblyScope scope(&masm, buffer_size);
56 for (size_t i = 0; i < buffer_instruction_count; ++i) {
57 masm.add(x0, x1, Operand(x2));
58 }
59 }
60 masm.FinalizeCode();
61 iterations++;
62 } while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));
63
64 cli.PrintResults(iterations, timer.GetElapsedSeconds());
65 return cli.GetExitCode();
66 }
67