1*4684ddb6SLionel Sambuc #include "timing.h" 2*4684ddb6SLionel Sambuc #include <stdio.h> 3*4684ddb6SLionel Sambuc 4*4684ddb6SLionel Sambuc #define INPUT_TYPE int64_t 5*4684ddb6SLionel Sambuc #define INPUT_SIZE 512 6*4684ddb6SLionel Sambuc #define FUNCTION_NAME __floatdidf 7*4684ddb6SLionel Sambuc 8*4684ddb6SLionel Sambuc #ifndef LIBNAME 9*4684ddb6SLionel Sambuc #define LIBNAME UNKNOWN 10*4684ddb6SLionel Sambuc #endif 11*4684ddb6SLionel Sambuc 12*4684ddb6SLionel Sambuc #define LIBSTRING LIBSTRINGX(LIBNAME) 13*4684ddb6SLionel Sambuc #define LIBSTRINGX(a) LIBSTRINGXX(a) 14*4684ddb6SLionel Sambuc #define LIBSTRINGXX(a) #a 15*4684ddb6SLionel Sambuc 16*4684ddb6SLionel Sambuc double FUNCTION_NAME(INPUT_TYPE x); 17*4684ddb6SLionel Sambuc main(int argc,char * argv[])18*4684ddb6SLionel Sambucint main(int argc, char *argv[]) { 19*4684ddb6SLionel Sambuc INPUT_TYPE input[INPUT_SIZE]; 20*4684ddb6SLionel Sambuc int i, j; 21*4684ddb6SLionel Sambuc 22*4684ddb6SLionel Sambuc srand(42); 23*4684ddb6SLionel Sambuc 24*4684ddb6SLionel Sambuc // Initialize the input array with data of various sizes. 25*4684ddb6SLionel Sambuc for (i=0; i<INPUT_SIZE; ++i) 26*4684ddb6SLionel Sambuc input[i] = (((uint64_t)rand() << 32) | (uint64_t)rand()) >> (rand() & 63); 27*4684ddb6SLionel Sambuc 28*4684ddb6SLionel Sambuc double bestTime = __builtin_inf(); 29*4684ddb6SLionel Sambuc void *dummyp; 30*4684ddb6SLionel Sambuc for (j=0; j<1024; ++j) { 31*4684ddb6SLionel Sambuc 32*4684ddb6SLionel Sambuc uint64_t startTime = mach_absolute_time(); 33*4684ddb6SLionel Sambuc for (i=0; i<INPUT_SIZE; ++i) 34*4684ddb6SLionel Sambuc FUNCTION_NAME(input[i]); 35*4684ddb6SLionel Sambuc uint64_t endTime = mach_absolute_time(); 36*4684ddb6SLionel Sambuc 37*4684ddb6SLionel Sambuc double thisTime = intervalInCycles(startTime, endTime); 38*4684ddb6SLionel Sambuc bestTime = __builtin_fmin(thisTime, bestTime); 39*4684ddb6SLionel Sambuc 40*4684ddb6SLionel Sambuc // Move the stack alignment between trials to eliminate (mostly) aliasing effects 41*4684ddb6SLionel Sambuc dummyp = alloca(1); 42*4684ddb6SLionel Sambuc } 43*4684ddb6SLionel Sambuc 44*4684ddb6SLionel Sambuc printf("%16s: %f cycles.\n", LIBSTRING, bestTime / (double) INPUT_SIZE); 45*4684ddb6SLionel Sambuc 46*4684ddb6SLionel Sambuc return 0; 47*4684ddb6SLionel Sambuc } 48