Parallella Community

You mentioned wanting to track down where a routine comes from. The linker e-ld has an option to print out which input file a symbol is in. Use -y or --symbol-trace followed by the symbol name (you may need a leading underscore on the name). Doesn't seem to pick up references from libraries though.

Alternatively the -M map option on the linker might give you a clue as ou could see what is close to that routine and there might be another name you recognise.

Tim

"e-objdump -D" will list a disassembly of the binary image. Doing "e-objdump -D file.e | grep '>:'" is what I use to see objects placement.

Can you please explain what "matrix with shape : 10x9x8x7" means? Is it a 4-dimensional array?

In your exercise, do you yry to invert the matrix (i.e., find its reciprocal) or to transpose it?

Thanks Tim,
Nice to know these things.

Done more searching and it turns out that aeabi_idivmod is relevant to the linux version of the gcc compilations, but not the e-gcc compilations.

it would be nice to profile the code generated by e-gcc, but when I compile with -pg I get :
/opt/adapteva/esdk/tools/e-gnu.arm7l/bin/../lib/gcc/epiphany-elf/4.7.0/../../../../epiphany-elf/bin/ld: cannot find -lc_p
I have tried manually searching for a library libc_p.a or whatever and not found it.

Interesting. Everybody knows how to transpose a 2-D matrix. I can easily imagine how to transpose a 3-D array (rotate the cuboid around the principal diagonal - but even then, I think there are 2 options for the amount of rotation - 120 degrees and 240 degrees). I have hard time imagining how to transpose a 4-D one...