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Altera_Forum
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14 years ago

Nios II/f performance on Cyclone IV E

Hi, I am trying to evaluate Nios II/f on a dev. board fitted with EP4CE55F23C7. I've ported the Cyclone III Dhrystone example from Altera (Fast Nios II Hardware Design Example) to my board....
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Altera_Forum
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14 years ago

Try the following changes to the gcc sources, the 2nd may be relevant.

gcc/config/nios2/nios2.h may need some changes undone/fixed:

1) Change the value of JUMP_TABLES_IN_TEXT_SECTION from "1" to "flag_pic".

2) Remove "!SYMBOL_REF_EXTERNAL_P(RTX) &&" from the definition of SYMBOL_REF_IN_NIOS2_SMALL_DATA_P(RTX).

From http://www.alterawiki.com/wiki/crossgcc see also http://www.alterawiki.com/wiki/gcc_patches which may improve the code for both versions of gcc.