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1a4d82fc JJ |
1 | #include "timing.h" |
2 | #include <stdio.h> | |
3 | ||
4 | #define INPUT_TYPE uint64_t | |
5 | #define INPUT_SIZE 256 | |
6 | #define FUNCTION_NAME __umoddi3 | |
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 | ||
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] = (((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 | } |