title: MIPS32 and MIPS64 instructions
body: <p>I have the following two questions:</p>
  
  <p>1) What will happen if MIPS32 instructions are used in a MIPS64 assembly program? Will MIPS64 assembler assemble the mixed program?</p>
  
  <p>2) Can MIPS64 assembler assemble a MIPS32 assembly program? If so, will it run correctly, i.e., produce the same output as in a machine with MIPS32 architecture?</p>
  
  <p>Thanks a lot!</p>