static inline void idct4col_add(UINT8 *dest, int line_size, const INT16 *col)
static inline void idct4col_add(UINT8 *dest, int line_size, const DCTELEM *col)
static inline void idct4col_add(UINT8 *dest, int line_size, const INT16 *col){    int c0, c1, c2, c3, a0, a1, a2, a3;    const UINT8 *cm = cropTbl + MAX_NEG_CROP;    a0 = col[8*0];    a1 = col[8*1];    a2 = col[8*2];    a3 = col[8*3];    c0 = (a0 + a2)*C3 + (1 << (C_SHIFT - 1));    c2 = (a0 - a2)*C3 + (1 << (C_SHIFT - 1));    c1 = a1 * C1 + a3 * C2;    c3 = a1 * C2 - a3 * C1;    dest[0] = cm[dest[0] + ((c0 + c1) >> C_SHIFT)];    dest += line_size;    dest[0] = cm[dest[0] + ((c2 + c3) >> C_SHIFT)];    dest += line_size;    dest[0] = cm[dest[0] + ((c2 - c3) >> C_SHIFT)];    dest += line_size;    dest[0] = cm[dest[0] + ((c0 - c1) >> C_SHIFT)];}