1 files changed, 15 insertions, 0 deletions

diff --git a/SD-VBS/common/matlab/timingFuncs/photonStartTiming.c b/SD-VBS/common/matlab/timingFuncs/photonStartTiming.c
new file mode 100644
index 0000000..bbf5231
--- /dev/null
+++ b/SD-VBS/common/matlab/timingFuncs/photonStartTiming.c
@@ -0,0 +1,15 @@
+#include"mex.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <math.h>
+
+void mexFunction(int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[])
+{
+    uint32_t* cycles;
+    plhs[0] = mxCreateNumericMatrix(1, 2, mxUINT32_CLASS, mxREAL);
+    cycles = (uint32_t*)mxGetPr(plhs[0]);
+    __asm__ __volatile__( "rdtsc": "=a" (cycles[0]), "=d" (cycles[1]));    
+ 
+    return;
+}