Altera preprocessor definitions

[Altera_Forum]

Hi all OpenCL / FPGA hackers 

 I'm working on some OpenCL that I would like to run on our Bittware FPGA card and compare against GPU version (an obvious exercise, which I am sure many have already done). Now while OpenCL is portable, this does not translate to performance portability, so to make a fare comparison I should optimise the OpenCL for an ALtera FPGA and then for th NVidia Card... there should be plenty of code resuse but there will be certain vendor specific things ( num_simd_work_items on the Device side, or changing the kernel coding style significantly in places) so I'd like to do something like # ifdef __ALTERA__   // special optimised FPGA kernel code# else  // GPU optimised kernel code# endif  But I can find anything about such definitions being asserted by aoc   Does anyone have insider information about the defintions made by aoc?  If not then I can just manually assert -D__ALTERA__ and thats fine... but I'd like to know any proper defintions.  Thank you in advanced,

[Altera_Forum]

Hi, 

 I believe that ALTERA_CL is a preprocessor definition that aoc will automatically set for you upon compilation. Also, __attribute__(...) should be ignored by a vendor's OpenCL compiler if it is not understood, maybe generate a compile warning, but not a compile error.  Are there any other preprocessor definitions that you have in mind?  Cheers!

[Altera_Forum]

--- Quote Start ---  Hi,  I believe that ALTERA_CL is a preprocessor definition that aoc will automatically set for you upon compilation. Also, __attribute__(...) should be ignored by a vendor's OpenCL compiler if it is not understood, maybe generate a compile warning, but not a compile error.  Are there any other preprocessor definitions that you have in mind?  Cheers!  --- Quote End ---    No I think ALTERA_CL will be sufficient for my needs thankyou, I mainly what to have the FPGA and GPU optimised code in the same source file.  Thank you