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
22 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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 "globals-vixl.h"
28
29 #include "aarch64/instructions-aarch64.h"
30 #include "aarch64/macro-assembler-aarch64.h"
31
32 #include "bench-utils.h"
33
34 using namespace vixl;
35 using namespace vixl::aarch64;
36
37 // This program focuses on the emission of branches and veneers.
main(int argc,char * argv[])38 int main(int argc, char* argv[]) {
39 BenchCLI cli(argc, argv);
40 if (cli.ShouldExitEarly()) return cli.GetExitCode();
41
42 const size_t buffer_size = 256 * KBytes;
43 const size_t instructions_per_iteration = 4;
44 const size_t max_buffer_iterations =
45 buffer_size / (instructions_per_iteration * kInstructionSize);
46 MacroAssembler masm(buffer_size);
47
48 BenchTimer timer;
49
50 size_t iterations = 0;
51 do {
52 masm.Reset();
53
54 Label target_1, target_2, target_3, target_4;
55 for (size_t i = 0; i < max_buffer_iterations; i++) {
56 masm.B(&target_1);
57 }
58 masm.Bind(&target_1);
59 for (size_t i = 0; i < max_buffer_iterations; i++) {
60 masm.B(eq, &target_2);
61 }
62 masm.Bind(&target_2);
63 for (size_t i = 0; i < max_buffer_iterations; i++) {
64 masm.Cbz(x2, &target_3);
65 }
66 masm.Bind(&target_3);
67 for (size_t i = 0; i < max_buffer_iterations; i++) {
68 masm.Tbz(x3, 2, &target_4);
69 }
70 masm.Bind(&target_4);
71
72 masm.FinalizeCode();
73 iterations++;
74 } while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));
75
76 cli.PrintResults(iterations, timer.GetElapsedSeconds());
77 return cli.GetExitCode();
78 }
79