POW2
#define MAX_NUM_TILE_COLS POW2(MAX_LOG2_TILE_COLUMNS)
if (var->xres > POW2(11) || yDim >= POW2(11)) {
if (var->hsync_len > POW2(9) || hSyncOff > POW2(11) ||
var->left_margin - 2 >= POW2(9) || vSyncOn >= POW2(13) ||
vSyncOff >= POW2(13) || vBackPorch >= POW2(9) ||
tiles_in_X >= POW2(6) || tiles_in_X <= 0) {
if (var->xres > POW2(10) || var->yres >= POW2(10)) {
if (var->hsync_len > POW2(8) || hSyncOff - 1 > POW2(10) ||
var->left_margin - 2 >= POW2(8) || vSyncOn >= POW2(12) ||
vSyncOff >= POW2(12) || vBackPorch >= POW2(8) ||
tiles_in_X >= POW2(4) || tiles_in_X <= 0) {