1#include "timing.h"
2#include <stdio.h>
3
4#define INPUT_TYPE uint64_t
5#define INPUT_SIZE 512
6#define FUNCTION_NAME __floatundixf
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
16long double FUNCTION_NAME(INPUT_TYPE x);
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] = (((uint64_t)rand() << 32) | (uint64_t)rand()) >> (rand() & 63);
27
28	double bestTime = __builtin_inf();
29	void *dummyp;
30	for (j=0; j<1024; ++j) {
31
32		uint64_t startTime = mach_absolute_time();
33		for (i=0; i<INPUT_SIZE; ++i)
34			FUNCTION_NAME(input[i]);
35		uint64_t endTime = mach_absolute_time();
36
37		double thisTime = intervalInCycles(startTime, endTime);
38		bestTime = __builtin_fmin(thisTime, bestTime);
39
40		// Move the stack alignment between trials to eliminate (mostly) aliasing effects
41		dummyp = alloca(1);
42	}
43
44	printf("%16s: %f cycles.\n", LIBSTRING, bestTime / (double) INPUT_SIZE);
45
46	return 0;
47}
48