88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <time.h>
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#include <inttypes.h>
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#include <libfixmath/fixmath.h>
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#include "hiclock.h"
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//#define fix_func fix16_exp
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//#define fix_func_str "fix16_exp"
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//#define flt_func expf
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//#define flt_func_str "expf"
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//#define fix_func fix16_atan
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//#define fix_func_str "fix16_atan"
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//#define flt_func atanf
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//#define flt_func_str "atanf"
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#define fix_func fix16_sin
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#define fix_func_str "fix16_sin"
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#define flt_func sinf
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#define flt_func_str "sinf"
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//#define fix_func fix16_sqrt
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//#define fix_func_str "fix16_sqrt"
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//#define flt_func sqrtf
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//#define flt_func_str "sqrtf"
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int main(int argc, char** argv) {
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printf("libfixmath test tool\n");
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hiclock_init();
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uintptr_t args = (1 << 8);
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uintptr_t iter = (1 << 8);
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uintptr_t pass = (1 << 8);
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uintptr_t i;
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srand(time(NULL));
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hiclock_t fix_duration = 0;
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hiclock_t flt_duration = 0;
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fix16_t fix_error = 0;
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uintptr_t k;
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for(k = 0; k < pass; k++) {
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fix16_t fix_args[args];
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for(i = 0; i < args; i++)
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fix_args[i] = (rand() ^ (rand() << 16));
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fix16_t fix_result[args];
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hiclock_t fix_start = hiclock();
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for(i = 0; i < iter; i++) {
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uintptr_t j;
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for(j = 0; j < args; j++)
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fix_result[j] = fix_func(fix_args[j]);
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}
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hiclock_t fix_end = hiclock();
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float flt_args[args];
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for(i = 0; i < args; i++)
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flt_args[i] = fix16_to_float(fix_args[i]);
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float flt_result[args];
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hiclock_t flt_start = hiclock();
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for(i = 0; i < iter; i++) {
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uintptr_t j;
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for(j = 0; j < args; j++)
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flt_result[j] = flt_func(flt_args[j]);
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}
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hiclock_t flt_end = hiclock();
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for(i = 0; i < args; i++)
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fix_error += abs(fix16_from_float(flt_result[i]) - fix_result[i]);
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flt_duration += (flt_end - flt_start);
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fix_duration += (fix_end - fix_start);
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}
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printf("%16s: %08"PRIuHICLOCK" @ %"PRIu32"Hz\n", flt_func_str, flt_duration, HICLOCKS_PER_SEC);
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printf("%16s: %08"PRIuHICLOCK" @ %"PRIu32"Hz\n", fix_func_str, fix_duration, HICLOCKS_PER_SEC);
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printf(" Difference: %08"PRIiHICLOCK" (% 3.2f%%)\n", (flt_duration - fix_duration), ((fix_duration * 100.0) / flt_duration));
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printf(" Error: %f%%\n", ((fix16_to_dbl(fix_error) * 100.0) / (args * pass)));
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return EXIT_SUCCESS;
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}
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