x0, x1, ... , x30 (extended)w0, w1, ... , w30 (word)# prefix.[] is the value in the memory.x1 holds 1024, the following instruction will load Memory[1024] to x0.LDR x0, [x1]
xzr, wzr: 0 when read, ignore writes.sp errors if not aligned to a multiple of 16 bytes.fp is an alias of x29. Same as rbp (Base Frame Pointer)lr is an alias of x30. Holds the return address used by ret.
OP destination, A, B means destination = A OP Badd, orr, eor, mvn) and add, sub, and mov can do optional shift or rotation of the last element.add x1, x2, x3, lsl 32 means x1 = x2 + (x3 << 32).add w1, w2, w3, ror 8 means w1 = w2 + (w3 >>> 8).x86, operations do not need size suffixes. They are inferred.Register Pair Load, Store mode.
ldr x0, x1, [x2]: x2 → x0, x2+8 → x1mov only between registers.w register or 8 bytes x registers.b (zero-extend), sb (sign-extend)h (zero-extend), sh (sign-extend)ldrb w0, [x1] read 1 byte at Memory[x1], zero-extend to 4 bytes, put to w0x0, ... , x7 then saved on the stack.x0.x0 to x18.x19 to x29.lr, alias of x30) if it invokes any procedures.bl) sets lr, alias of x30 to PC + 4.ret by default jumps to Mem[x30] but can also use ret x? for any other registers.No comments yet. Be the first to share your thoughts.