Difference between revisions of "Assembly Language Twos Complement"
(Created page with "You can use a Bitwise NOT to flip all of the bits in a register, ie a binary digit of 0 becomes 1 and so on. We can use this to write a program to convert numbers to Two's Com...") |
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==Program== | ==Program== | ||
| − | + | inp r0,2 | |
| − | + | mvn r1,r0 | |
| − | + | add r1,r1,#1 | |
| − | + | out r1, | |
==Explanation== | ==Explanation== | ||
Revision as of 10:36, 21 January 2019
You can use a Bitwise NOT to flip all of the bits in a register, ie a binary digit of 0 becomes 1 and so on. We can use this to write a program to convert numbers to Two's Complement:
Program
inp r0,2 mvn r1,r0 add r1,r1,#1 out r1,
Explanation
Line 1 will get a value from the keyboard, and store it in Register 0.
Line 2 will perform a Bitwise NOT on the value in Register 0, and store it in Register 1.
Line 3 will Add #1 to the value in Register 1, and store it in Register 1.
Line 4 will output the value in Register 1 to the screen.
