| Endianness | |||||||||||||||
| Why is endianness significant? | |||||||||||||||
| If you transfer data between machines (removable media or network), | |||||||||||||||
| you need to know which order it is stored in. | |||||||||||||||
| Things to note: | |||||||||||||||
| The order refers to BYTES, not bits. The bits are not simply reversed from lsb to msb. | |||||||||||||||
| Ordering only refers to data stored in MEMORY. | |||||||||||||||
| Data in registers stored from msb to lsb, left to right, regardless of endianness. | |||||||||||||||
| 32-bit register: b31....b0 | |||||||||||||||
| Endianness has nothing to do with the order of C-style strings. | |||||||||||||||
| What is a C-style string? | |||||||||||||||
| Array of char, ended by '\0' | |||||||||||||||
| Each char is 1 byte | |||||||||||||||
| course | C | M | S | C | 3 | 1 | 1 | \0 | |||||||
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||||
| char course[]= "CMSC 311"; | |||||||||||||||