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
How to avoid literal pools ?
Tools, Software and IDEs blog
Forums
Videos & Files
Help
Jump...
Cancel
New
Replies
3 replies
Subscribers
126 subscribers
Views
3439 views
Users
0 members are here
Related
How to avoid literal pools ?
Offline
Christophe Beausoleil
over 7 years ago
Note: This was originally posted on 19th January 2012 at http://forums.arm.com
Hello everyone,
I am using Cortex-R4F (TI TMS570), and I noticed that ARM C compiler often adds data in literal pools as in example below :
C code
:
RTI_Re_TickFlag = 0;
ASM generated code :
000004 4c66 LDR r4,|L1.416|
000006 2700 MOVS r7,#0
...
ENDP
|L1.416|
DCD RTI_Re_TickFlag
My problem is that this constant is in the same section than the code, so the Cortex-R4 Harward architecture (separate data/instruction) is not used at its best.
It makes load/store unit (LSU) accesses interfere with prefetch unit (PFU) accesses.
So, can we make armcc (with optimization options or some directives...) not generate literal pools ?
Thanks
Best regards
Christophe
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
Answered
Link a pure binary file to image with scatter file
0
7307
views
3
replies
Latest
2 months ago
by
Ronan Synnott
Answered
Failed to read contents of Internal RAM L1-I_DATA in ARM DS
0
Arm Development Studio
Cache
Debug and Trace Services Layer (DTSL)
11914
views
23
replies
Latest
2 months ago
by
Boon Khai
Suggested Answer
DS-5 connect fail when cortex-r5 is in lock-step mode
0
10032
views
10
replies
Latest
3 months ago
by
Stuart Hirons
Suggested Answer
On Cortex-M4F microcontrollers: is fixed point math faster or floating point?
0
9754
views
10
replies
Latest
3 months ago
by
Ronan Synnott
Suggested Answer
Debugging kernel: OS support not working for Linux 5.4
0
Kernel Developers
External Hardware Debug
Debugger
8718
views
5
replies
Latest
3 months ago
by
sgoldschmidt
<
>
View all questions in Arm Development Studio forum