} else if (4 == height) {
LW4(src, stride, tp0, tp1, tp2, tp3);
INSERT_W4_UB(tp0, tp1, tp2, tp3, src0);
LW4(dst, stride, tp0, tp1, tp2, tp3);
INSERT_W4_UB(tp0, tp1, tp2, tp3, dst0);
dst0 = __msa_aver_u_b(src0, dst0);
} else if (4 == height) {
LW4(src, stride, tp0, tp1, tp2, tp3);
INSERT_W4_UB(tp0, tp1, tp2, tp3, src0);
LW4(dst, stride, tp0, tp1, tp2, tp3);
INSERT_W4_UB(tp0, tp1, tp2, tp3, dst0);
dst0 = __msa_aver_u_b(src0, dst0);