Difference between revisions of "Assembly Language IF"
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==C# example== | ==C# example== | ||
<syntaxhighlight lang=csharp> | <syntaxhighlight lang=csharp> | ||
| − | int | + | int y = 0; |
| − | + | int x = 0; | |
| + | if (y == 10) | ||
{ | { | ||
| − | + | x = 9; | |
} | } | ||
| − | + | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | ==Assembly Version== | + | ==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.<br> | ||
| + | Line 2 sets the value of Register 1 to the value 0.<br> | ||
| + | Line 3 compares the value in Register 0 with the value 10.<br> | ||
| + | Line 4 will branch to the .end label if the previous compare was NOT EQUAL.<br> | ||
| + | Line 5 will move the value 9 into Register 1. <br> | ||
| + | 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.<br> | Line 1 sets the value of Register 0 to the value 0.<br> | ||
| − | Line 2 | + | Line 2 sets the value of Register 1 to the value 0.<br> |
| − | + | Line 3 compares the value in Register 0 with the value 10.<br> | |
| − | Line | + | Line 4 will branch to the .true label if the previous compare was EQUAL.<br> |
| − | Line | + | 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. <br> | ||
| + | Line 8 is the .end label | ||
Latest revision as of 09:28, 22 January 2020
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
