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 <stdint.h>
28#include <stdio.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
38static const unsigned kDefaultInstructionCount = 100000;
39
40// This program focuses on emitting simple instructions.
41//
42// This code will emit a given number of 'add r0, r1, r2' in a buffer.
43// This code therefore focuses on Emit and Operand.
44void benchmark(unsigned instructions, InstructionSet isa) {
45  const unsigned buffer_size = 256 * KBytes;
46  timeval start;
47  gettimeofday(&start, NULL);
48
49  MacroAssembler masm(buffer_size);
50  masm.UseInstructionSet(isa);
51
52#define __ masm.
53
54  for (unsigned i = 0; i < instructions; ++i) {
55    __ Add(r0, r1, Operand(r2));
56  }
57
58  masm.FinalizeCode();
59
60  timeval end;
61  gettimeofday(&end, NULL);
62  double delta = (end.tv_sec - start.tv_sec) +
63                 static_cast<double>(end.tv_usec - start.tv_usec) / 1000000;
64  printf("%s: time for %d instructions: %gs\n",
65         isa == T32 ? "T32" : "A32",
66         instructions,
67         delta);
68}
69
70int main(int argc, char* argv[]) {
71  unsigned instructions = 0;
72
73  switch (argc) {
74    case 1:
75      instructions = kDefaultInstructionCount;
76      break;
77    case 2:
78      instructions = atoi(argv[1]);
79      break;
80    default:
81      printf("Usage: %s [#instructions]\n", argv[0]);
82      exit(1);
83  }
84
85#ifdef VIXL_INCLUDE_TARGET_A32
86  benchmark(instructions, A32);
87#endif
88#ifdef VIXL_INCLUDE_TARGET_T32
89  benchmark(instructions, T32);
90#endif
91
92  return 0;
93}
94