Computer Architecture, Instruction Set, Intel, X86, Computer Science.
modes of ADD are as follows. 04 ib --> ADD AL, imm8 --> Add imm8 to AL. 05 id --> ADD EAX, imm32 --> Add imm32 to EAX. 01 /r --> ADD r/m32, r32 --> Add r32 to r/m32. 03 /r --> ADD r32, r/m32 --> Add r/m32 to r32. Since our opcode is 01, the addressing mode of our instruction is, ADD r/m32, r32.