Arm Community
Site
Search
User
Site
Search
User
Groups
Arm Research
DesignStart
Education Hub
Graphics and Gaming
High Performance Computing
Innovation
Multimedia
Open Source Software and Platforms
Physical
Processors
Security
System
Software Tools
TrustZone for Armv8-M
中文社区
Blog
Announcements
Artificial Intelligence
Automotive
Healthcare
HPC
Infrastructure
Innovation
Internet of Things
Machine Learning
Mobile
Smart Homes
Wearables
Forums
All developer forums
IP Product forums
Tool & Software forums
Support
Open a support case
Documentation
Downloads
Training
Arm Approved program
Arm Design Reviews
Community Help
More
Cancel
Developer Community
Tools and Software
Software Tools
Jump...
Cancel
Software Tools
Arm Development Studio forum
Overflow not detected
Tools, Software and IDEs blog
Forums
Videos & Files
Help
Jump...
Cancel
New
Replies
3 replies
Subscribers
126 subscribers
Views
1407 views
Users
0 members are here
Related
Overflow not detected
Offline
Stefano Cillo
over 7 years ago
Note: This was originally posted on 6th September 2010 at http://forums.arm.com
Hi all,
I'm quite new in arm assembly programming, and I went into a odd behaviour.
I'm going to multiply two numbers with the mul instruction;
the code is:
ldr r0, =0x26000000
ldr r1, =0x10
muls r2, r1, r0
bvs somewhere
The result from the the mul istruction is (0x2600 0000 * 0x10 = ) 0x2 6000 0000.
Now, i expected the V bit going to one, but none of the CPSR bits is setted.
Why is happening this? How can I detect overflow in such operations?
I'm using the gnuarm compiler, and working with 32-bit registers.
Thanks in advance,
Stefano.
More questions in this forum
By title
By date
By reply count
By view count
By most asked
By votes
By quality
Descending
Ascending
All recent questions
Unread questions
Questions you've participated in
Questions you've asked
Unanswered questions
Answered questions
Questions with suggested answers
Questions with no replies
Suggested Answer
How to view SFRs in DS during debugging?
0
1934
views
1
reply
Latest
1 month ago
by
Ronan Synnott
Answered
Dual-core debugging in DS
0
4823
views
2
replies
Latest
1 month ago
by
Ivan Savvateev
Answered
Failure to get an evaluation license with error Unable to execute API call /api/v1/connect
0
5734
views
3
replies
Latest
1 month ago
by
Tim Holt
Suggested Answer
DS52020.0 connection to Musca-A/B boards not working
0
Arm Development Studio
Musca-A
6779
views
4
replies
Latest
1 month ago
by
Daniel Oliveira
Suggested Answer
Positioning a function in a Position Independent Executable for ARMV8
0
7349
views
3
replies
Latest
2 months ago
by
Stephen Theobald
<
>
View all questions in Arm Development Studio forum