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Altera_Forum
Honored Contributor
Honored ContributorAdd a custom instruction with only one input - BSP auto generated
I've just created a custom instruction in Qsys that uses only one input. There is only dataa[] in the interface.
However the Eclipse generates a instruction with 2 operands.#define ALT_CI_WELLPRNG_0(A,B) __builtin_custom_inii(ALT_CI_WELLPRNG_0_N,(A),(B))3 Replies
Altera_ForumFor your Qsys component, did you set the 'operands' parameter of the custom instruction interface to the value of '1' ? By default, it is set to '2'.
- Altera_Forum
Thank you ted.
I didn´t notice the fild when building it. And since you are here. I´m preaty sure my instruction takes only one cicle to execute. But I can´t change the field to "Combinational" only "Variable". - Altera_ForumDoes your interface described in your _hw.tcl look like Figure 3, or Figure 5 ? Try removing extra signals if it looks like Figure 5.
