When referring to 64-bit addresses in this chapter:
- A clean 24-bit address refers to binary
zeros in the high-order 5 bytes followed by a 24-bit address in the
low-order 3 bytes, that is, X’0000000000aaaaaa’
- A clean 31-bit address refers to binary
zeros in the high-order 4 bytes followed by a 31-bit address in the
low-order 4 bytes, that is, X’00000000aaaaaaaa’ where
Bit 32 of the 31-bit address must be 0.
- A 64 bit address uses all 64-bits for the address.
The following summarizes the
previous information:
Table 1. Summary of 64-bit Terminology for ExitsSummary
of 64-bit Terminology for ExitsAddress
|
Bits 0-31 |
Bit 32 |
Bits 33-39 |
Bits 40-63 |
---|
24-bit |
0 |
0 |
0 |
Address |
31-bit |
0 |
0 |
Address |
64-bit |
Address |