NUM_VS_THREADS   1063 drivers/gpu/drm/radeon/evergreend.h #define		NUM_VS_THREADS(x)				((x) << 8)
NUM_VS_THREADS    271 drivers/gpu/drm/radeon/r600d.h #       define NUM_VS_THREADS(x)                          ((x) << 8)
NUM_VS_THREADS    587 drivers/gpu/drm/radeon/rv770d.h #define		NUM_VS_THREADS(x)				((x) << 8)