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3.18.3 AMD GCN Options

These options are defined specifically for the AMD GCN port.

-march=gpu
-mtune=gpu

Set architecture type or tuning for gpu. Supported values for gpu are

fiji

Compile for GCN3 Fiji devices (gfx803).

gfx900

Compile for GCN5 Vega 10 devices (gfx900).

gfx906

Compile for GCN5 Vega 20 devices (gfx906).

-mstack-size=bytes

Specify how many bytes of stack space will be requested for each GPU thread (wave-front). Beware that there may be many threads and limited memory available. The size of the stack allocation may also have an impact on run-time performance. The default is 32KB when using OpenACC or OpenMP, and 1MB otherwise.