NUM_PS_THREADS   1062 drivers/gpu/drm/radeon/evergreend.h #define		NUM_PS_THREADS(x)				((x) << 0)
NUM_PS_THREADS    270 drivers/gpu/drm/radeon/r600d.h #       define NUM_PS_THREADS(x)                          ((x) << 0)
NUM_PS_THREADS    586 drivers/gpu/drm/radeon/rv770d.h #define		NUM_PS_THREADS(x)				((x) << 0)