Changes

add r0,r1,r2 // load r0 with r1+r2 add r0,r1,99 // load r0 with r1+99 adr r0,''label'' // load r0 with the address ''label'' (this actually calculates an address from the [[Register#Program Counter|PC]] plus an offset) beq ''label'' // branch to label if equal bne ''label'' // branch to label if not equal blt ''label'' // branch to label if less bgt ''label'' // branch to label if greater cmp r0,r1 // compare register r0 with register r1 cmp r0,99 // compare the number 99 with register r0 ldr r0,[r1,0] // load register r0 from the address pointed to by (r1 + (0 * ''size'')) where ''size'' is 8 bytes for 64-bit stores, 4 bytes for 32-bit stores ldr w0,[r1,0] // like above but reads 32 bits only - note the use of w0 instead of r0 for the source register name ldrb w0,[r1,0] // like above but reads 1 byte (8 bits) only - note the use of w0 instead of r0 for the source register name ldur r0,[r1,0] // load register r0 from the address pointed to by (r1 + 0) - the mnemonic means "load ''unscaled'' register" mov r0,r1 // move data from r1 to r0 mov r0,99 // load r0 with 99 (only certain immediate values are possible) str r0,[r1,0] // store register r0 to address pointed to by (r1 + (0 * ''size'')) where ''size'' is 8 bytes for 64-bit stores strb w0,[r1,0] // like str but writes one byte only - note the use of w0 instead of r0 for the source register name stur r0,[r1,0] // store register r0 to the address pointed to by (r1 + 0) - the mnemonic means "store ''unscaled'' register" svc 0 // perform a syscall msub r0,r1,r2,r3 // load r0 with r3-(r1*r2) (useful for calculating remainders) madd r0,r1,r2,r3 // load r0 with r3+(r1*r2) mul r0,r1,r2 // load r0 with r1*r2 (actually an alias - see ARM ARM) push r0 // push r0 onto the stack pop r0 // pop r0 off the stack udiv r0,r1,r2 // unsigned - divide r1 by r2, places quotient into r0 - remainder is not calculated (use msub)