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#include <stdint.h>
#include <stdio.h>
#include <inttypes.h>
#include "cycles.h"
#define CHECKS(mode, quotient) \
void checks_##mode() { \
uint64_t checksum=UINT64_C(0), \
a=UINT64_C(0x10000000000), \
b=UINT64_C(0x1000); \
for(int i=0; i<10000; i++) { \
uint64_t q = (quotient); \
a += UINT64_C(0x36667); \
b += UINT64_C(0x13); \
checksum += q; \
} \
printf("checksum = %" PRIx64 "\n", checksum); \
}
#define CHECKS2(mode, quotient) \
void checks2_##mode() { \
uint64_t checksum=UINT64_C(0), \
a=UINT64_C(0x10000000000), \
b=UINT64_C(0x1000); \
for(int i=0; i<5000; i++) { \
uint64_t q = (quotient); \
a += UINT64_C(0x36667); \
b += UINT64_C(0x13); \
checksum += q; \
q = (quotient); \
a += UINT64_C(0x36667); \
b += UINT64_C(0x13); \
checksum += q; \
} \
printf("checksum = %" PRIx64 "\n", checksum); \
}
CHECKS(normal, a/b)
CHECKS(fp, __builtin_fp_udiv64(a, b))
CHECKS2(normal, a/b)
CHECKS2(fp, __builtin_fp_udiv64(a, b))
int main() {
cycle_t start, stop;
cycle_count_config();
start = get_cycle();
checks_normal();
stop = get_cycle();
printf("normal division: %" PRcycle " cycles\n", stop-start);
start = get_cycle();
checks_fp();
stop = get_cycle();
printf("fp division: %" PRcycle " cycles\n", stop-start);
start = get_cycle();
checks2_normal();
stop = get_cycle();
printf("normal division x2: %" PRcycle " cycles\n", stop-start);
start = get_cycle();
checks2_fp();
stop = get_cycle();
printf("fp division x2: %" PRcycle " cycles\n", stop-start);
}
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