Mastering Assembly Programming

Data section

As there is no specific order of sections in the source file, we will begin with a quick look at the data section in order to better comprehend the code. The data section or, to be more precise, the arrangement of data in a data section, is quite self-explanatory. The emphasis was made on data alignment, allowing faster access with aligned SSE instructions:

section '.data' data readable writeable   ; Current date and birth date   ; The dates are arranged in a way most suitable   ; for use with XMM registers   cday   dd 9               ; Current day of the month   cyear  dd 2017            ; Current year   bday   dd 16              ; Birth date day of the month   byear  dd 1979            ; Birth year   cmonth dd 5               ; 1-based number of current month          dd 0                 bmonth dd 1               ; 1-based number of birth month ...