PGI User Forum
 SearchSearch   MemberlistMemberlist     RegisterRegister   ProfileProfile    Log inLog in 

CUDA-x86.

ARM NEON support
Goto page Previous  1, 2
 
Post new topic   Reply to topic    PGI User Forum Forum Index -> Programming and Compiling
View previous topic :: View next topic  
Author Message
Linas



Joined: 22 May 2012
Posts: 9

PostPosted: Sun Jun 10, 2012 8:41 pm    Post subject: Reply with quote

Hi Mat

for

"BTW , I also found if I add compiler flag -o1 or -o2 ,the binary look like same as I used "-Mnoneon " it is normal? "
your answer is mean , add o1~o2 not impact the performance , only NEON or VFP support right?

for

"if I want to disable VFP support , what should I do?"
we want to know the different is

1.Neon + vfp
2.none neon +vfp
3.Neon + none VFP
4.none Neon + none VFP

base on your answer I have know we can't disable both , but how about I just disable vfp support?
Back to top
View user's profile
mkcolg



Joined: 30 Jun 2004
Posts: 5952
Location: The Portland Group Inc.

PostPosted: Mon Jun 11, 2012 9:03 am    Post subject: Reply with quote

Hi Linas,

Quote:
add o1~o2 not impact the performance , only NEON or VFP support right?
No. I'm saying that if you have vector operation then -O1 or -O2 should not effect it and I don't know why your binary would look the same as if "-Mnoneon" was applied. -O1 or -O2 do not disable vector operations.

Quote:
I have know we can't disable both , but how about I just disable vfp support?
Either VFP or NEON is used. Hence, to disable VFP, use NEON.

- Mat
Back to top
View user's profile
Linas



Joined: 22 May 2012
Posts: 9

PostPosted: Tue Jun 12, 2012 9:19 pm    Post subject: Reply with quote

Hi Mat
your answer "Either VFP or NEON is used. Hence, to disable VFP, use NEON."

so you mean could disable VFP to used Neon right, I don't see any compiler flag like -Mnoen.. so could you told me how to do that
Back to top
View user's profile
mkcolg



Joined: 30 Jun 2004
Posts: 5952
Location: The Portland Group Inc.

PostPosted: Wed Jun 13, 2012 9:13 am    Post subject: Reply with quote

Hi Linas,

Default => Use Neon
-Mnoneon => Use VFP

- Mat
Back to top
View user's profile
Display posts from previous:   
Post new topic   Reply to topic    PGI User Forum Forum Index -> Programming and Compiling All times are GMT - 7 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © phpBB Group