sub_h = new_rd_ia32_l_Eor(dbg, irg, block, a_h, sign, h_res_mode);
l_res = new_rd_ia32_l_Sub(dbg, irg, block, sub_l, sign, l_res_mode);
h_res = new_rd_ia32_l_SubC(dbg, irg, block, sub_h, sign, l_res_mode);
sub_h = new_rd_ia32_l_Eor(dbg, irg, block, a_h, sign, h_res_mode);
l_res = new_rd_ia32_l_Sub(dbg, irg, block, sub_l, sign, l_res_mode);
h_res = new_rd_ia32_l_SubC(dbg, irg, block, sub_h, sign, l_res_mode);