https://github.com/akkartik/mu/blob/master/subx/examples/ex2.subx
 1 # Add 1 and 1, and return the result in the exit code.
 2 #
 3 # To run (from the subx directory):
 4 #   $ ./subx translate examples/ex2.subx -o examples/ex2
 5 #   $ ./subx run examples/ex2
 6 # Expected result:
 7 #   $ echo $?
 8 #   2
 9 
10 == code 0x09000000
11 
12 # EBX = 1
13 bb/copy-to-EBX  1/imm32
14 # increment EBX
15 43/increment-EBX
16 # syscall(exit, EBX)
17 b8/copy-to-EAX  1/imm32/exit
18 cd/syscall  0x80/imm8
19 
20 # . . vim:nowrap:textwidth=0