User`s guide

Ranges and Extents

Ranges are speciﬁed by a pair of numbers separated by two periods (..) and are

inclusive. For example, a range of integers 0..4 includes the integers 0, 1, 2, 3,

and 4.

Extents are speciﬁed by a pair of numbers in angle brackets (<>) separated

by a colon (:) and are inclusive. For example, bits <7:3> speciﬁes an extent

including bits 7, 6, 5, 4, and 3.

Address Radix

All memory addresses, register addresses, and address offset values are in

hexadecimal notation unless speciﬁed otherwise.

Memory and Register Contents Radix

All data associated with read and write transactions to and from memory

locations and registers are in hexadecimal notation unless speciﬁed otherwise.

Must Be Zero

Fields speciﬁed as must be zero (MBZ) must never be ﬁlled by software with a

nonzero value. If the processor encounters a nonzero value in a ﬁeld speciﬁed

as MBZ, a reserved operand exception occurs.

Should Be Zero

Fields speciﬁed as should be zero (SBZ) should be ﬁlled by software with a zero

value. These ﬁelds may be used at some future time. Nonzero values in SBZ

ﬁelds produce UNPREDICTABLE results.

(low-order) and increasing to the left (high-order).

Memory ﬁgures have addresses starting at the top and increasing toward the

bottom.