riscv/insns/slli.h

   1 if (xlen == 64)
   2   WRITE_RD(RS1 << SHAMT);
   3 else
   4 {
   5   if(SHAMT & 0x20)
   6     throw trap_illegal_instruction();
   7   WRITE_RD(sext32(RS1 << SHAMT));
   8 }