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"lwu" , UTYPE { op=RISCVLUI };
"auipc" , UTYPE { op=RISCVAUIPC };
"jal", JAL ();
"jalr", JALR ();
"beq", BTYPE {op=RISCVBEQ};
"bne", BTYPE {op=RISCVBNE};
"blt", BTYPE {op=RISCVBLT};
"bge", BTYPE {op=RISCVBGE};
"bltu", BTYPE {op=RISCVBLTU};
"bgeu", BTYPE {op=RISCVBGEU};
"addi", ITYPE {op=RISCVADDI};
"stli", ITYPE {op=RISCVSLTI};
"sltiu", ITYPE {op=RISCVSLTIU};
"xori", ITYPE {op=RISCVXORI};
"ori", ITYPE {op=RISCVORI};
"andi", ITYPE {op=RISCVANDI};
"slli", SHIFTIOP{op=RISCVSLLI};
"srli", SHIFTIOP{op=RISCVSRLI};
"srai", SHIFTIOP{op=RISCVSRAI};
"add", RTYPE{op=RISCVADD};
"sub", RTYPE{op=RISCVSUB};
"sll", RTYPE{op=RISCVSLL};
"slt", RTYPE{op=RISCVSLT};
"sltu", RTYPE{op=RISCVSLT};
"xor", RTYPE{op=RISCVXOR};
"srl", RTYPE{op=RISCVSRL};
"sra", RTYPE{op=RISCVSRA};
"or", RTYPE{op=RISCVOR};
"and", RTYPE{op=RISCVAND};
"lb", LOAD{unsigned=false; width=RISCVBYTE};
"lbu", LOAD{unsigned=true; width=RISCVBYTE};
"lh", LOAD{unsigned=false; width=RISCVHALF};
"lhu", LOAD{unsigned=true; width=RISCVHALF};
"lw", LOAD{unsigned=false; width=RISCVWORD};
"lwu", LOAD{unsigned=true; width=RISCVWORD};
"ld", LOAD{unsigned=false; width=RISCVDOUBLE};
"sb", STORE{width=RISCVBYTE};
"sh", STORE{width=RISCVHALF};
"sw", STORE{width=RISCVWORD};
"sd", STORE{width=RISCVDOUBLE};
"addiw", ADDIW ();
"slliw", SHIFTW{op=RISCVSLLI};
"srliw", SHIFTW{op=RISCVSRLI};
"sraiw", SHIFTW{op=RISCVSRAI};
"addw", RTYPEW{op=RISCVADDW};
"subw", RTYPEW{op=RISCVSUBW};
"sslw", RTYPEW{op=RISCVSLLW};
"srlw", RTYPEW{op=RISCVSRLW};
"sraw", RTYPEW{op=RISCVSRAW};
"fence", FENCE ();
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