Assembly Language IF

C# example

int y = 0;
int x = 0;
if (y == 10)
{
    x = 9;
}

Assembly Version 1

   MOV R0, #0
   MOV R1, #0
   CMP R0, #10
   BNE end
   MOV R1, #9
end:

Line 1 sets the value of Register 0 to the value 0.
Line 2 sets the value of Register 1 to the value 0.
Line 3 compares the value in Register 0 with the value 10.
Line 4 will branch to the .end label if the previous compare was NOT EQUAL.
Line 5 will move the value 9 into Register 1.
Line 6 is the .end label

Assembly Version 2

   MOV R0, #0
   MOV R1, #0
   CMP R0, #10
   BEQ true
   B end
true:
   MOV R1, #9
end:

Line 1 sets the value of Register 0 to the value 0.
Line 2 sets the value of Register 1 to the value 0.
Line 3 compares the value in Register 0 with the value 10.
Line 4 will branch to the .true label if the previous compare was EQUAL.
Line 5 will branch to the .end Line 6 is the label for the .true code Line 7 will move the value 9 into Register 1.
Line 8 is the .end label