1#include "timing.h"
2#include <stdio.h>
3
4#define INPUT_TYPE int64_t
5#define INPUT_SIZE 256
6#define FUNCTION_NAME __negdi2
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 input);
17
18int main(int argc, char *argv[]) {
19	INPUT_TYPE input[INPUT_SIZE];
20	int i, j;
21
22	srand(42);
23
24	// Initialize the input array with data of various sizes.
25	for (i=0; i<INPUT_SIZE; ++i) {
26		input[i] = (((int64_t)rand() << 36) | (uint64_t)rand()) >> (rand() & 63);
27	}
28
29	int64_t fixedInput = INT64_C(0x1234567890ABCDEF);
30
31	double bestTime = __builtin_inf();
32	void *dummyp;
33	for (j=0; j<1024; ++j) {
34
35		uint64_t startTime = mach_absolute_time();
36		for (i=0; i<INPUT_SIZE; ++i)
37			FUNCTION_NAME(input[i]);
38		uint64_t endTime = mach_absolute_time();
39
40		double thisTime = intervalInCycles(startTime, endTime);
41		bestTime = __builtin_fmin(thisTime, bestTime);
42
43		// Move the stack alignment between trials to eliminate (mostly) aliasing effects
44		dummyp = alloca(1);
45	}
46
47	printf("%16s: %f cycles.\n", LIBSTRING, bestTime / (double) INPUT_SIZE);
48
49	return 0;
50}
51