.extInstruction insn1, 7, 0x21, SUFFIX_NONE, SYNTAX_3OP .extInstruction insn2, 7, 0x21, SUFFIX_NONE, SYNTAX_2OP .extInstruction insn3, 7, 0x21, SUFFIX_NONE, SYNTAX_1OP .extInstruction insn4, 7, 0x21, SUFFIX_NONE, SYNTAX_NOP start: insn1 r0,r1,r2 insn2 r0,r1 insn3 r1 insn4