<rdar://problem/12512722> Use arm divide instruction if available

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182665 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 52 insertions, 0 deletions

diff --git a/test/timing/modsi3.c b/test/timing/modsi3.c
new file mode 100644
index 00000000..3275b832
--- /dev/null
+++ b/test/timing/modsi3.c
@@ -0,0 +1,52 @@
+#include "timing.h"
+#include <stdio.h>
+
+#define INPUT_TYPE int32_t
+#define INPUT_SIZE 256
+#define FUNCTION_NAME __modsi3
+
+#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 input1, INPUT_TYPE input2);
+
+int main(int argc, char *argv[]) {
+	INPUT_TYPE input1[INPUT_SIZE];
+	INPUT_TYPE input2[INPUT_SIZE];
+	int i, j;
+	
+	srand(42);
+	
+	// Initialize the input array with data of various sizes.
+	for (i=0; i<INPUT_SIZE; ++i) {
+		input1[i] = rand();
+		input2[i] = rand() + 1;
+	}
+	
+	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(input1[i], input2[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;
+}