#define ET_L_MIDPOINT_SUBPIXEL_TM_PC_MIDPOINT()                         \
    d = (LAP_MUL(pm->r, lx)                                             \
      + LAP_MUL(pm->s, v[l].y)                                          \
      + LAP_MUL(pm->t, 256 * LAP_ONE)) << 1;                             \
    ldu = LAP_DIV(tc[n].u - tc[l].u, ldy);                              \
    lu = tc[l].u + LAP_MUL(ps, ldu);                                    \
    au = LAP_MUL((lu << 1) - LAP_ONE, pm->r) - (pm->k << 1);             \
    bu = LAP_MUL((lu << 1) - LAP_ONE, pm->s) - (pm->l << 1);             \
    eu = LAP_MUL(lu, d);                                                \
    eu-= LAP_MUL(pm->r + (pm->k << 1), lx);                             \
    eu-= LAP_MUL(pm->s + (pm->l << 1), v[l].y);                         \
    eu-= LAP_MUL(pm->t + (pm->m << 1), 256 * LAP_ONE);                   \
    ldv = LAP_DIV(tc[n].v - tc[l].v, ldy);                              \
    lv = tc[l].v + LAP_MUL(ps, ldv);                                    \
    av = LAP_MUL((lv << 1) - LAP_ONE, pm->r) - (pm->n << 1);             \
    bv = LAP_MUL((lv << 1) - LAP_ONE, pm->s) - (pm->p << 1);             \
    ev = LAP_MUL(lv, d);                                                \
    ev-= LAP_MUL(pm->r + (pm->n << 1), lx);                             \
    ev-= LAP_MUL(pm->s + (pm->p << 1), v[l].y);                         \
    ev-= LAP_MUL(pm->t + (pm->q << 1), 256 * LAP_ONE);