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