The PowerISA vector facilities (VMX and VSX) are extensive, but does not always provide a direct or obvious functional equivalent to the Intel Intrinsics. But being not obvious is not the same as imposible. It just requires some basic programing skills. It is a good idea to have an overall understanding of the vector capabilities the PowerISA. You do not need to memorize every instructions but is helps to know where to look. Both the PowerISA and OpenPOWER ABI have a specific structure and organization that can help you find what you looking for. It also helps to understand the relationship between the PowerISAs low level instructions and the higher abstraction of the vector intrinsics as defined by the OpenPOWER ABIs Vector Programming Interfaces and the the defacto standard of GCC's PowerPC AltiVec Built-in Functions.