Assembly directives Most assembler provides "directives", to do things that are not part of the machine code but are convenient Defining immediate constants Say your code always uses the number 100 for a specific thing, say the "size" of an array You can just put this in the NASM code: %define SIZE 100 Later on in your code you can do things like:.
Array Addresses Arrays in C are contiguous memory areas that hold a number of values of the same data type (int, long, *char, etc.). Many programmers when they first use C think arrays are pointers. That isn't true. A pointer stores a single memory address, an array is a contiguous area of memory that stores multiple values. 1 2 3 4 5 6 7 8 9 10 11.
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The Art of Assembly Language Page iii The Art of Assembly Language (Full Contents) Forward Why Would Anyone Learn This Stuff? ..... 1 1 What's Wrong With Assembly Language ..... 1 2 What's Right With Assembly Language?.
array: .fill 400 data-size defaults to 1 (byte). I believe the value that fills the 400 bytes defaults to zero. If you are actually using the nasm assembler (which is Intel format, not AT&T), then the times directive will work, as avinash indicated, as long as you want to predefine the data in either the .text or .data section..
Define an Array. Arrays are declared similarly to other data types, but they are distinguished with brackets, [ and ]. When an array is declared, the type of data it stores must be specified. (Each array can store only one type of data.) After the array is declared, it must be created with the keyword new, just like working with objects..
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