1 // Copyright 2019, VIXL authors
2 // All rights reserved.
3 //
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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
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12 // * Neither the name of ARM Limited nor the names of its contributors may be
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14 // specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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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 the emission of branches and veneers.
main(int argc,char * argv[])37 int main(int argc, char* argv[]) {
38 BenchCLI cli(argc, argv);
39 if (cli.ShouldExitEarly()) return cli.GetExitCode();
40
41 const size_t buffer_size = 256 * KBytes;
42 const size_t instructions_per_iteration = 4;
43 const size_t max_buffer_iterations =
44 buffer_size / (instructions_per_iteration * kInstructionSize);
45 MacroAssembler masm(buffer_size);
46
47 BenchTimer timer;
48
49 size_t iterations = 0;
50 do {
51 masm.Reset();
52
53 Label target_1, target_2, target_3, target_4;
54 for (size_t i = 0; i < max_buffer_iterations; i++) {
55 masm.B(&target_1);
56 }
57 masm.Bind(&target_1);
58 for (size_t i = 0; i < max_buffer_iterations; i++) {
59 masm.B(eq, &target_2);
60 }
61 masm.Bind(&target_2);
62 for (size_t i = 0; i < max_buffer_iterations; i++) {
63 masm.Cbz(x2, &target_3);
64 }
65 masm.Bind(&target_3);
66 for (size_t i = 0; i < max_buffer_iterations; i++) {
67 masm.Tbz(x3, 2, &target_4);
68 }
69 masm.Bind(&target_4);
70
71 masm.FinalizeCode();
72 iterations++;
73 } while (!timer.HasRunFor(cli.GetRunTimeInSeconds()));
74
75 cli.PrintResults(iterations, timer.GetElapsedSeconds());
76 return cli.GetExitCode();
77 }
78