Skip to Content
Digital Design and Computer Architecture, ARM Edition
book

Digital Design and Computer Architecture, ARM Edition

by Sarah Harris, David Harris
April 2015
Intermediate to advanced
584 pages
21h 24m
English
Morgan Kaufmann
Content preview from Digital Design and Computer Architecture, ARM Edition

Image

Table 6.10

Index mode control bits for memory instructions

PWIndex Mode
00Post-index
01Not supported
10Offset
11Pre-index

Table 6.11

Memory operation type control bits for memory instructions

LBInstruction
00STR
01STRB
10LDR
11LDRB

Example 6.3

Translating Memory Instructions into Machine Language

Translate the following assembly language statement into machine language.

STR R11, [R5], #-26

Solution

STR is a memory instruction, so it has an op of 012. According to Table 6.11, L = 0 and B = 0 for STR. The instruction uses post-indexing, so according to Table 6.10, P = 0 and W = 0. The immediate offset is subtracted from the base, so I¯=0 and U = 0.

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Digital Design and Computer Architecture, 2nd Edition

Digital Design and Computer Architecture, 2nd Edition

David Harris, Sarah Harris
Computer Architecture, 5th Edition

Computer Architecture, 5th Edition

John L. Hennessy, David A. Patterson

Publisher Resources

ISBN: 9780128009116