A [tagged pointer] (https://en.wikipedia.org/wiki/Tagged_pointer) is a well know concept which every virtual machine (VM) tries to exploit. Unlike some other VM’s Chakra doesn’t tag a pointer. Instead, Chakra tag’s the non-pointer a.k.a a float or an int. For the purpose of this blog, I will illustrate the implementation of tagged float in 64 bit. In the context of this blog float means double-precision 64-bit format IEEE 754-2008 as specified by ECMA262. Chakra doesn’t tag floats in ...
