1// Copyright 2015, ARM Limited
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
20// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27#include "vixl/a64/macro-assembler-a64.h"
28#include "vixl/a64/instructions-a64.h"
29#include "vixl/globals.h"
30
31using namespace vixl;
32
33static const int kDefaultIterationsCount = 100000;
34
35// This program focuses on the emission of branches and veneers.
36int main(int argc, char* argv[]) {
37  int iterations = 0;
38
39  switch (argc) {
40    case 1: iterations = kDefaultIterationsCount; break;
41    case 2: iterations = atoi(argv[1]); break;
42    default:
43      printf("Usage: %s [#iterations]\n", argv[0]);
44      exit(1);
45  }
46
47  size_t base_buf_size = iterations * 4 * kInstructionSize;
48  MacroAssembler masm(base_buf_size);
49
50#define __ masm.
51
52  Label target_1, target_2, target_3, target_4;
53  for (int i = 0; i < iterations; i++) {
54    __ B(&target_1);
55  }
56  __ Bind(&target_1);
57  for (int i = 0; i < iterations; i++) {
58    __ B(eq, &target_2);
59  }
60  __ Bind(&target_2);
61  for (int i = 0; i < iterations; i++) {
62    __ Cbz(x2, &target_3);
63  }
64  __ Bind(&target_3);
65  for (int i = 0; i < iterations; i++) {
66    __ Tbz(x3, 2, &target_4);
67  }
68  __ Bind(&target_4);
69
70  masm.FinalizeCode();
71
72  return 0;
73}
74