1 | // |
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2 | // Lol Engine - Benchmark program |
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3 | // |
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4 | // Copyright: (c) 2005-2011 Sam Hocevar <sam@hocevar.net> |
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5 | // This program is free software; you can redistribute it and/or |
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6 | // modify it under the terms of the Do What The Fuck You Want To |
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7 | // Public License, Version 2, as published by Sam Hocevar. See |
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8 | // http://sam.zoy.org/projects/COPYING.WTFPL for more details. |
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9 | // |
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10 | |
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11 | #if defined HAVE_CONFIG_H |
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12 | # include "config.h" |
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13 | #endif |
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14 | |
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15 | #include <cstdio> |
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16 | |
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17 | #include "core.h" |
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18 | |
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19 | using namespace std; |
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20 | using namespace lol; |
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21 | |
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22 | static size_t const REAL_TABLE_SIZE = 10000; |
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23 | static size_t const REAL_RUNS = 50; |
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24 | |
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25 | void bench_real(int mode) |
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26 | { |
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27 | float result[12] = { 0.0f }; |
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28 | Timer timer; |
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29 | |
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30 | for (size_t run = 0; run < REAL_RUNS; run++) |
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31 | { |
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32 | switch (mode) |
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33 | { |
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34 | case 1: |
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35 | break; |
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36 | } |
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37 | |
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38 | real fib1 = 1.0, fib2 = 1.0; |
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39 | timer.Get(); |
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40 | for (size_t i = 0; i < REAL_TABLE_SIZE; i++) |
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41 | { |
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42 | real tmp = fib1 + fib2; |
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43 | fib1 = fib2; |
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44 | fib2 = tmp; |
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45 | } |
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46 | result[0] += timer.Get(); |
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47 | |
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48 | real fact = 1.0; |
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49 | timer.Get(); |
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50 | for (size_t i = 0; i < REAL_TABLE_SIZE; i++) |
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51 | fact = fact * real(1.0 + i); |
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52 | result[1] += timer.Get(); |
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53 | |
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54 | real invfact = 1.0; |
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55 | timer.Get(); |
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56 | for (size_t i = 0; i < REAL_TABLE_SIZE; i++) |
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57 | invfact = invfact / real(1.0 + i); |
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58 | result[2] += timer.Get(); |
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59 | |
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60 | timer.Get(); |
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61 | for (size_t i = 0; i < REAL_TABLE_SIZE / 128; i++) |
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62 | sin(real(0.01 * i)); |
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63 | result[3] += timer.Get() * 128; |
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64 | |
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65 | timer.Get(); |
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66 | for (size_t i = 0; i < REAL_TABLE_SIZE / 128; i++) |
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67 | exp((real)(int)(i - REAL_TABLE_SIZE / 256)); |
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68 | result[4] += timer.Get() * 128; |
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69 | } |
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70 | |
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71 | for (size_t i = 0; i < sizeof(result) / sizeof(*result); i++) |
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72 | result[i] *= 1e9f / (REAL_TABLE_SIZE * REAL_RUNS); |
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73 | |
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74 | Log::Info(" ns/elem\n"); |
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75 | Log::Info("real = real + real %7.3f\n", result[0]); |
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76 | Log::Info("real = real * real %7.3f\n", result[1]); |
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77 | Log::Info("real = real / real %7.3f\n", result[2]); |
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78 | Log::Info("real = sin(real) %7.3f\n", result[3]); |
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79 | Log::Info("real = exp(real) %7.3f\n", result[4]); |
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80 | } |
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81 | |
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