Andrew Waterman's PhD thesis "Design of the RISC-V Instruction Set Architecture" has a nice comparison of ISA designs and differences of RISC-V, MIPS, SPARC, Al

Andrew Waterman's PhD thesis "Design of the RISC-V Instruction Set Architecture" has a nice comparison of ISA designs and differences of RISC-V, MIPS, SPARC, Alpha, ARMv7/8, Thumb, OpenRISC, and x86/x86-64. https://people.eecs.berkeley.edu/~krste/papers/EECS-2016-1.pdf https://people.eecs.berkeley.edu/~krste/papers/EECS-2016-1.p...