1 #include "timing.h"
2 #include <stdio.h>
3 
4 #define INPUT_TYPE int32_t
5 #define INPUT_SIZE 256
6 #define FUNCTION_NAME __modsi3
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 
16 INPUT_TYPE FUNCTION_NAME(INPUT_TYPE input1, INPUT_TYPE input2);
17 
main(int argc,char * argv[])18 int 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] = rand();
28                     input2[i] = rand() + 1;
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