Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
17049 Discussions

Problem with barrier(CLK_GLOBAL_MEM_FENCE)

Altera_Forum
Honored Contributor II
‎05-19-2015 07:58 PM
1,216 Views

hi , 

 

When I added the barrier(CLK_GLOBAL_MEM_FENCE) in the kernel code , I always got the message "quartus compilation failed"  

I searched some threads and knew the if-else will result in this warning message (....at most two workgroup is allowed) 

But in my kernel program , there are lots of if-else to decide the path like as follow: 

"""""""""" 

func1 

func2 

funcA 

funcB 

funcC{ 

if 

func1 

else 

func2 

} 

funcD{ 

if 

funcA 

else 

funcB 

} 

 

funcE{ 

if 

funcC 

else 

funcD 

} 

__kernel void func() 

{ 

funcE; 

barrier(CLK_GLOBAL_MEM_FENCE) 

}  

"""""""""" 

Could anyone tell us how to utilization the code if there are lots of if-else to decide the PATH? 

BinarySearch might encounter the same situation (It's just my guess). 

 

How to solve this situation ? Maybe we can use pipe or other programming skills to fit the design in DE5 

 

Thanks : )
0 Kudos

Link Copied

0 Replies
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.