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-rw-r--r--test/timing/negdi2.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/test/timing/negdi2.c b/test/timing/negdi2.c
new file mode 100644
index 000000000..2668eb1e8
--- /dev/null
+++ b/test/timing/negdi2.c
@@ -0,0 +1,50 @@
+#include "timing.h"
+#include <stdio.h>
+
+#define INPUT_TYPE int64_t
+#define INPUT_SIZE 256
+#define FUNCTION_NAME __negdi2
+
+#ifndef LIBNAME
+#define LIBNAME UNKNOWN
+#endif
+
+#define LIBSTRING LIBSTRINGX(LIBNAME)
+#define LIBSTRINGX(a) LIBSTRINGXX(a)
+#define LIBSTRINGXX(a) #a
+
+INPUT_TYPE FUNCTION_NAME(INPUT_TYPE input);
+
+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] = (((int64_t)rand() << 36) | (uint64_t)rand()) >> (rand() & 63);
+ }
+
+ 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(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;
+}