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tde_m's avatar
tde_m
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Emulation fails with user-defined data type for a kernel argument

Hello, as far as I understand, it is plausible to use a user-defined data type for a kernel argument. Example: typedef struct{ char my_id; char num_ids; }my_type_t; __kernel void app(co...
tde_m's avatar
tde_m
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Hi Hiroto,

so according to the documentation I can pass structure parameters in OpenCL kernels by value.

But the emulator fails in compiling it (see my first post). Why is this happening?

This occur even if I disable the automatic alignment by using the packed attribute (in any case, the alignment is 1 byte being the struct composed by 2 chars).

Thanks

Hiroto_K_Intel's avatar
Hiroto_K_Intel
Icon for New Contributor rankNew Contributor
6 years ago

Hi, tde_m,

Yes, you are right.

BTW, could you like to test with -fast-emulator flag ?

Intel recommends when emulating kernel code, you add -fast-emulator for 18.1 and later.

https://www.intel.com/content/www/us/en/programmable/documentation/mwh1391807965224.html#hzx1553406416602

On my side, the code you posted firstly completed compiling successfully.

Only -march=emulator mode is legacy now and it is possibility that the issue was reported and has been resolved when migrating from lagacy emulator to fast emulator.

If so, I could not get the answer why, sorry.