Utility function to get a vector of set bits

Template function to return a vector with the positions of all set bits in a variable.

slsSupportLib/include/bit_utils.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <vector>
+#include <bitset>
+namespace sls {
+template <typename T> std::vector<int> getSetBits(T val) {
+    constexpr size_t bitsPerByte = 8;
+    constexpr size_t numBits  = sizeof(T)*bitsPerByte;
+    std::bitset<numBits> bs(val);
+    std::vector<int> set_bits;
+    set_bits.reserve(bs.count());
+    for (size_t i = 0; i < bs.size(); ++i) {
+        if (bs[i]) {
+            set_bits.push_back(static_cast<int>(i));
+        }
+    }
+    return set_bits;
+}
+} // namespace sls