static void gen_smul_dual(TCGv a, TCGv b) { TCGv tmp1 = new_tmp(); TCGv tmp2 = new_tmp(); tcg_gen_ext16s_i32(tmp1, a); tcg_gen_ext16s_i32(tmp2, b); tcg_gen_mul_i32(tmp1, tmp1, tmp2); dead_tmp(tmp2); tcg_gen_sari_i32(a, a, 16); tcg_gen_sari_i32(b, b, 16); tcg_gen_mul_i32(b, b, a); tcg_gen_mov_i32(a, tmp1); dead_tmp(tmp1); }