Data addressing and transmission

1. ALIGN pseudocommand: Let the address of the variable following it be equal to the address of the previous variable plus the number of bytes specified by ALIGN, and then recursively return.

Var1 byte? The var1 address is 00001000.

ALIGN 4

Var2 byte? The var2 address is 00001004.

Var3 byte? The var3 address is 00001008.

Var4 byte? The var4 address is ike100c.

2. Two Methods for getting array elements

2.1. Address offset

Mov eax, [arrayVar + I]

2.2 subscript Variables

Mov eax, arrayVar [I]

2.3. Variable description

2.3.1. array variable name arrayVar indicates the starting address of the array variable

2.3.2. offset I is an integer multiple of the size of the array element bytes.

3. LOOP commands

3.1 format

Mov ecx, n

L1:

...;

Loop L1

3.2 run the loop command to reduce ecx by 1. If ecx is not equal to 0, the system jumps to the target address specified by the loop. Otherwise, the system executes the next line of code.

3.3 The loopz (or loope) command adds a condition to jump to the target address: ZF = 1;

The loopnz (or loopne) command adds a condition to jump to the target address: ZF = 0