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*: performance improvements with old GCC, reimplement altivec
author Paper <paper@tflc.us>
date Mon, 28 Apr 2025 16:31:59 -0400
parents f9ca85d2f14c
children
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4b5a557aa64f *: turns out extern is a practical joke. rewrite to be always inline again
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2 /* ------------------------------------------------------------------------ */
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3 /* simple benchmark for getting the min/max range of an audio sample. */
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5 extern void test_benchmark_sample_minmax_simple_impl(int16_t *smpl, uint32_t length, int32_t *pmin, int32_t *pmax);
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6 extern void test_benchmark_sample_minmax_vec_impl(int16_t *smpl, uint32_t length, int32_t *pmin, int32_t *pmax);
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8 VEC_FUNC_IMPL void test_benchmark_sample_minmax(void)
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9 {
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10 int32_t min, max;
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11 clock_t start, end;
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12 int i;
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13 int16_t *q = vec_malloc(16000001u * 2u);
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15 printf("\nsigned 16-bit audio sample min/max - 1 thousand passes - 16000001 samples\n\n");
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17 start = clock();
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18 for (i = 0; i < 100; i++) {
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19 min = INT32_MAX;
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20 max = INT32_MIN;
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21 test_benchmark_sample_minmax_vec_impl(q, 16000001u, &min, &max);
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22 }
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23 end = clock();
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25 printf("- vec: took %f secs\n", (double)(end - start) / CLOCKS_PER_SEC);
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27 start = clock();
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28 for (i = 0; i < 100; i++) {
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29 min = INT32_MAX;
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30 max = INT32_MIN;
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31 test_benchmark_sample_minmax_simple_impl(q, 16000001u, &min, &max);
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32 }
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33 end = clock();
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35 printf("- simple: took %f secs\n", (double)(end - start) / CLOCKS_PER_SEC);
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37 printf("\n");
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39 vec_free(q);
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40 }
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42 static void test_benchmark(void)
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43 {
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44 printf("------- BENCHMARK --------\n");
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45 test_benchmark_sample_minmax();
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46 }