what bits in an arm64 instruction is the operation code?
10101001101111100111101111111101
a9be7bfd
this is the binary for stp x29, x30, [sp, #-32]
I know bit 31-30 is the 64 bit-32 bit bits, bits 0-14 is for the registers, and bits 15, 21 is for the immediate offset, but which bits are the operation code/instruction itself.