1// Copyright 2016, 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 <stdio.h>
28#include <stdint.h>
29#include <sys/time.h>
30
31#include "aarch32/constants-aarch32.h"
32#include "aarch32/instructions-aarch32.h"
33#include "aarch32/macro-assembler-aarch32.h"
34
35using namespace vixl;
36using namespace vixl::aarch32;
37
38#ifdef VIXL_DEBUG
39static const int kDefaultIterationsCount = 10000;
40#else
41static const int kDefaultIterationsCount = 100000;
42#endif
43
44// This program focuses on the emission of branches and veneers.
45void benchmark(int iterations, InstructionSet isa) {
46  const int buffer_size = 256 * KBytes;
47
48  timeval start;
49  gettimeofday(&start, NULL);
50  MacroAssembler masm(buffer_size);
51  masm.UseInstructionSet(isa);
52
53#define __ masm.
54
55  Label target_1, target_2, target_3, target_4;
56  for (int i = 0; i < iterations; i++) {
57    __ B(&target_1);
58  }
59  __ Bind(&target_1);
60  for (int i = 0; i < iterations; i++) {
61    __ B(eq, &target_2);
62  }
63  __ Bind(&target_2);
64  for (int i = 0; i < iterations; i++) {
65    __ Bl(&target_3);
66  }
67  __ Bind(&target_3);
68  for (int i = 0; i < iterations; i++) {
69    __ Blx(&target_4);
70  }
71  __ Bind(&target_4);
72
73  masm.FinalizeCode();
74  timeval end;
75  gettimeofday(&end, NULL);
76  double delta = (end.tv_sec - start.tv_sec) +
77                 static_cast<double>(end.tv_usec - start.tv_usec) / 1000000;
78  printf("%s: time for %d iterations: %gs\n",
79         isa == T32 ? "T32" : "A32",
80         iterations,
81         delta);
82}
83
84
85int main(int argc, char* argv[]) {
86  int iterations = 0;
87
88  switch (argc) {
89    case 1:
90      iterations = kDefaultIterationsCount;
91      break;
92    case 2:
93      iterations = atoi(argv[1]);
94      break;
95    default:
96      printf("Usage: %s [#iterations]\n", argv[0]);
97      exit(1);
98  }
99
100#ifdef VIXL_INCLUDE_TARGET_A32
101  benchmark(iterations, A32);
102#endif
103#ifdef VIXL_INCLUDE_TARGET_T32
104  benchmark(iterations, T32);
105#endif
106
107  return 0;
108}
109