res = res + (res >> 8);
return (res + (res >> 16)) & 0x000000FF;
}
+
+unsigned int hweight64(uint64_t w)
+{
+#if BITS_PER_LONG == 32
+ return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w);
+#else
+ uint64_t res = w - ((w >> 1) & 0x5555555555555555ULL);
+ res = (res & 0x3333333333333333ULL) + ((res >> 2) & 0x3333333333333333ULL);
+ res = (res + (res >> 4)) & 0x0F0F0F0F0F0F0F0FULL;
+ res = res + (res >> 8);
+ res = res + (res >> 16);
+ return (res + (res >> 32)) & 0x00000000000000FFULL;
+#endif
+}