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#include <stdint.h>
#include <inttypes.h>
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include "../cycles.h"
static uint32_t dm_random_uint32(void) {
static uint32_t current=UINT32_C(0xDEADBEEF);
current = ((uint64_t) current << 6) % UINT32_C(4294967291);
return current;
}
static uint64_t dm_biased_random_uint32(void) {
uint32_t flags = dm_random_uint32();
uint32_t r;
switch (flags & 15) {
case 0:
r = dm_random_uint32() & 0xFU;
break;
case 1:
r = dm_random_uint32() & 0xFFU;
break;
case 2:
r = dm_random_uint32() & 0xFFFU;
break;
case 3:
r = dm_random_uint32() & 0xFFFFU;
break;
case 4:
r = dm_random_uint32() & 0xFFFFFU;
break;
case 5:
r = dm_random_uint32() & 0xFFFFFFU;
break;
case 6:
r = dm_random_uint32() & 0xFFFFFFFU;
break;
case 7:
r = dm_random_uint32() & 0x3;
break;
default:
r = dm_random_uint32();
}
return r;
}
inline uint32_t native_udiv32(uint32_t x, uint32_t y) {
return x/y;
}
extern uint32_t my_udiv32(uint32_t x, uint32_t y);
int main() {
cycle_t time_me=0, time_native=0;
cycle_count_config();
for(int i=0; i<1000; i++) {
uint32_t x = dm_biased_random_uint32();
uint32_t y = dm_biased_random_uint32();
if (y == 0) continue;
cycle_t cycle_a, cycle_b, cycle_c;
uint32_t q1, q2;
cycle_a = get_cycle();
q1 = native_udiv32(x, y);
cycle_b = get_cycle();
q2 = my_udiv32(x, y);
cycle_c = get_cycle();
if(q1 != q2) {
printf("ERREUR %u %u\n", q1, q2);
}
time_native += cycle_b - cycle_a;
time_me += cycle_c - cycle_b;
}
printf("%" PRcycle "\t%" PRcycle "\n", time_native, time_me);
return 0;
}
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