maze

gistfile1.asm

# gcc -nostdlib -o maze maze.s && ./maze

.globl _start

_start:
    xor  %edi, %edi
    inc  %edi
    mov  %rsp, %rsi
go:
    movl $0xb195e2, (%rsi)
    rdtsc

    ## We use the lowest bit of the cycle counter
    ## as a coin flip.  Shift here first to get
    ## different patterns, e.g.
    # shr  $17,  %eax

    and  $1,   %al
    add  %al,  2(%rsi)
    mov  %edi, %eax
    xor  %edx, %edx
    mov  $3,   %dl
    syscall
    jmp  go