Initial import of compiler-rt.

 -


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@74292 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 47 insertions, 0 deletions

diff --git a/test/timing/floatdidf.c b/test/timing/floatdidf.c
new file mode 100644
index 000000000..2c970d4df
--- /dev/null
+++ b/test/timing/floatdidf.c
@@ -0,0 +1,47 @@
+#include "timing.h"
+#include <stdio.h>
+
+#define INPUT_TYPE int64_t
+#define INPUT_SIZE 512
+#define FUNCTION_NAME __floatdidf
+
+#ifndef LIBNAME
+#define LIBNAME UNKNOWN
+#endif
+
+#define LIBSTRING		LIBSTRINGX(LIBNAME)
+#define LIBSTRINGX(a)	LIBSTRINGXX(a)
+#define LIBSTRINGXX(a)	#a
+
+double FUNCTION_NAME(INPUT_TYPE x);
+
+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] = (((uint64_t)rand() << 32) | (uint64_t)rand()) >> (rand() & 63);
+	
+	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;
+}