diff options
Diffstat (limited to 'test/builtins/timing/lshrdi3.c')
-rw-r--r-- | test/builtins/timing/lshrdi3.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/test/builtins/timing/lshrdi3.c b/test/builtins/timing/lshrdi3.c new file mode 100644 index 000000000000..b474cf3e0c38 --- /dev/null +++ b/test/builtins/timing/lshrdi3.c @@ -0,0 +1,49 @@ +#include "timing.h" +#include <stdio.h> + +#define INPUT_TYPE int +#define INPUT_SIZE 512 +#define FUNCTION_NAME __lshrdi3 + +#ifndef LIBNAME +#define LIBNAME UNKNOWN +#endif + +#define LIBSTRING LIBSTRINGX(LIBNAME) +#define LIBSTRINGX(a) LIBSTRINGXX(a) +#define LIBSTRINGXX(a) #a + +int64_t FUNCTION_NAME(int64_t input, INPUT_TYPE count); + +int main(int argc, char *argv[]) { + INPUT_TYPE input[INPUT_SIZE]; + int i, j; + + srand(42); + + // Initialize the input array with data of various sizes. + for (i=0; i<INPUT_SIZE; ++i) + input[i] = rand() & 0x3f; + + int64_t fixedInput = INT64_C(0x1234567890ABCDEF); + + double bestTime = __builtin_inf(); + void *dummyp; + for (j=0; j<1024; ++j) { + + uint64_t startTime = mach_absolute_time(); + for (i=0; i<INPUT_SIZE; ++i) + FUNCTION_NAME(fixedInput, input[i]); + uint64_t endTime = mach_absolute_time(); + + double thisTime = intervalInCycles(startTime, endTime); + bestTime = __builtin_fmin(thisTime, bestTime); + + // Move the stack alignment between trials to eliminate (mostly) aliasing effects + dummyp = alloca(1); + } + + printf("%16s: %f cycles.\n", LIBSTRING, bestTime / (double) INPUT_SIZE); + + return 0; +} |