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  1. //
  2. // Lol Engine — Benchmark program
  3. //
  4. // Copyright © 2005—2020 Sam Hocevar <sam@hocevar.net>
  5. //
  6. // This program is free software. It comes without any warranty, to
  7. // the extent permitted by applicable law. You can redistribute it
  8. // and/or modify it under the terms of the Do What the Fuck You Want
  9. // to Public License, Version 2, as published by the WTFPL Task Force.
  10. // See http://www.wtfpl.net/ for more details.
  11. //
  12. #if HAVE_CONFIG_H
  13. # include "config.h"
  14. #endif
  15. #include <cstdio>
  16. #include <lol/engine.h>
  17. #include <lol/msg>
  18. using namespace lol;
  19. static size_t const MATRIX_TABLE_SIZE = 64 * 1024;
  20. static size_t const MATRIX_RUNS = 100;
  21. void bench_matrix(int mode)
  22. {
  23. float result[5] = { 0.0f };
  24. lol::timer timer;
  25. /* Set up tables */
  26. mat4 *pm = new mat4[MATRIX_TABLE_SIZE + 1];
  27. float *pf = new float[MATRIX_TABLE_SIZE];
  28. for (size_t run = 0; run < MATRIX_RUNS; run++)
  29. {
  30. switch (mode)
  31. {
  32. case 1:
  33. for (size_t i = 0; i < MATRIX_TABLE_SIZE; i++)
  34. for (int j = 0; j < 4; j++)
  35. for (int k = 0; k < 4; k++)
  36. pm[i][j][k] = rand(-2.0f, 2.0f);
  37. break;
  38. }
  39. /* Copy matrices */
  40. timer.get();
  41. for (size_t i = 0; i < MATRIX_TABLE_SIZE; i++)
  42. pm[i] = pm[i + 1];
  43. result[0] += timer.get();
  44. /* Determinant */
  45. timer.get();
  46. for (size_t i = 0; i < MATRIX_TABLE_SIZE; i++)
  47. pf[i] = determinant(pm[i]);
  48. result[1] += timer.get();
  49. /* Multiply matrices */
  50. timer.get();
  51. for (size_t i = 0; i < MATRIX_TABLE_SIZE; i++)
  52. pm[i] *= pm[i + 1];
  53. result[2] += timer.get();
  54. /* Add matrices */
  55. timer.get();
  56. for (size_t i = 0; i < MATRIX_TABLE_SIZE; i++)
  57. pm[i] += pm[i + 1];
  58. result[3] += timer.get();
  59. /* Invert matrix */
  60. timer.get();
  61. for (size_t i = 0; i < MATRIX_TABLE_SIZE; i++)
  62. pm[i] = inverse(pm[i]);
  63. result[4] += timer.get();
  64. }
  65. delete[] pm;
  66. delete[] pf;
  67. for (size_t i = 0; i < sizeof(result) / sizeof(*result); i++)
  68. result[i] *= 1e9f / (MATRIX_TABLE_SIZE * MATRIX_RUNS);
  69. msg::info(" ns/elem\n");
  70. msg::info("mat4 = mat4 %7.3f\n", result[0]);
  71. msg::info("float = mat4.det() %7.3f\n", result[1]);
  72. msg::info("mat4 *= mat4 %7.3f\n", result[2]);
  73. msg::info("mat4 += mat4 %7.3f\n", result[3]);
  74. msg::info("mat4 = mat4.invert() %7.3f\n", result[4]);
  75. }