In theory, RISC meant smaller number of simpler generic instructions (reg<->reg, mem<->reg) which could be re-used to build complex functionality. However in pr

In theory, RISC meant smaller number of simpler generic instructions (reg<->reg, mem<->reg) which could be re-used to build complex functionality. However in practice one always needs specific operations for performance reasons. Having more and more specialized operations not only adds extra HW for rarely used ops, it also increases the program code size and also compiler complexity.