Homework SourseEnter an A in each cell in the following table for which a m
Enter an A in each cell in the following table for which a memory access starting at the given byte and for the given item type would be an aligned access, otherwise fill in the cell with M to indicate the access would be misaligned.
Value of 3 low-order bits of byte address
Width of
Object
0
1
2
3
4
5
6
7
1 byte
2 bytes
4 bytes
8 bytes
| Value of 3 low-order bits of byte address | ||||||||
| Width of Object | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 1 byte | ||||||||
| 2 bytes | ||||||||
| 4 bytes | ||||||||
| 8 bytes |
Solution
Value of 3 low-order bits of byte address
Width of
Object
0
1
2
3
4
5
6
7
1 byte
A
A
A
A
A
A
A
A
2 byte
A
M
A
M
A
M
A
M
4 byte
A
M
M
M
A
M
M
M
8 byte
A
M
M
M
M
M
M
M
An access to object of size s bytes at byte address A is aligned if A mod s = 0.
| Value of 3 low-order bits of byte address | ||||||||
| Width of Object | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 1 byte | A | A | A | A | A | A | A | A |
| 2 byte | A | M | A | M | A | M | A | M |
| 4 byte | A | M | M | M | A | M | M | M |
| 8 byte | A | M | M | M | M | M | M | M |
