1// Copyright 2015, 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
20// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 <sys/time.h>
28#include "globals-vixl.h"
29
30#include "aarch64/instructions-aarch64.h"
31#include "aarch64/macro-assembler-aarch64.h"
32
33using namespace vixl::aarch64;
34
35static const int kDefaultIterationsCount = 100000;
36
37// This program focuses on the emission of branches and veneers.
38int main(int argc, char* argv[]) {
39  int iterations = 0;
40
41  switch (argc) {
42    case 1:
43      iterations = kDefaultIterationsCount;
44      break;
45    case 2:
46      iterations = atoi(argv[1]);
47      break;
48    default:
49      printf("Usage: %s [#iterations]\n", argv[0]);
50      exit(1);
51  }
52
53  size_t base_buf_size = iterations * 4 * kInstructionSize;
54  timeval start;
55  gettimeofday(&start, NULL);
56  MacroAssembler masm(base_buf_size);
57
58#define __ masm.
59
60  Label target_1, target_2, target_3, target_4;
61  for (int i = 0; i < iterations; i++) {
62    __ B(&target_1);
63  }
64  __ Bind(&target_1);
65  for (int i = 0; i < iterations; i++) {
66    __ B(eq, &target_2);
67  }
68  __ Bind(&target_2);
69  for (int i = 0; i < iterations; i++) {
70    __ Cbz(x2, &target_3);
71  }
72  __ Bind(&target_3);
73  for (int i = 0; i < iterations; i++) {
74    __ Tbz(x3, 2, &target_4);
75  }
76  __ Bind(&target_4);
77
78  masm.FinalizeCode();
79
80  timeval end;
81  gettimeofday(&end, NULL);
82  double delta = (end.tv_sec - start.tv_sec) +
83                 static_cast<double>(end.tv_usec - start.tv_usec) / 1000000;
84  printf("A64: time for %d iterations: %gs\n", iterations, delta);
85
86  return 0;
87}
88