_bitmaskForChar:
    cmp x0, #0x61
    b.lt bad
    cmp x0, #0x7a
    b.gt bad

    mov x1, x0
    sub x1, x1, #0x61

    mov x2, #0x0

    for:
    add x2, x2, #0x8
    add x3, x3, #0x1

    start:
    cmp x3, x0
    b.lt for

    adrp x0, letters@page
    add x0, x0, letters@pageoff

    add x0, x0, x2
    ret

    bad:
    mov x0, #0x0
    ret