1#include "timing.h"
2#include <stdio.h>
3
4#define INPUT_TYPE uint64_t
5#define INPUT_SIZE 256
6#define FUNCTION_NAME __udivdi3
7
8#ifndef LIBNAME
9#define LIBNAME UNKNOWN
10#endif
11
12#define LIBSTRING		LIBSTRINGX(LIBNAME)
13#define LIBSTRINGX(a)	LIBSTRINGXX(a)
14#define LIBSTRINGXX(a)	#a
15
16INPUT_TYPE FUNCTION_NAME(INPUT_TYPE input1, INPUT_TYPE input2);
17
18int main(int argc, char *argv[]) {
19	INPUT_TYPE input1[INPUT_SIZE];
20	INPUT_TYPE input2[INPUT_SIZE];
21	int i, j;
22
23	srand(42);
24
25	// Initialize the input array with data of various sizes.
26	for (i=0; i<INPUT_SIZE; ++i) {
27		input1[i] = (((uint64_t)rand() << 36) | (uint64_t)rand()) >> (rand() & 63);
28		input2[i] = ((((uint64_t)rand() << 36) | (uint64_t)rand()) >> (rand() & 63)) + 1LL;
29	}
30
31	int64_t fixedInput = INT64_C(0x1234567890ABCDEF);
32
33	double bestTime = __builtin_inf();
34	void *dummyp;
35	for (j=0; j<1024; ++j) {
36
37		uint64_t startTime = mach_absolute_time();
38		for (i=0; i<INPUT_SIZE; ++i)
39			FUNCTION_NAME(input1[i], input2[i]);
40		uint64_t endTime = mach_absolute_time();
41
42		double thisTime = intervalInCycles(startTime, endTime);
43		bestTime = __builtin_fmin(thisTime, bestTime);
44
45		// Move the stack alignment between trials to eliminate (mostly) aliasing effects
46		dummyp = alloca(1);
47	}
48
49	printf("%16s: %f cycles.\n", LIBSTRING, bestTime / (double) INPUT_SIZE);
50
51	return 0;
52}
53