ALU_OP_SUB_C
carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C;
reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1));
reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C,
wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32);
ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1));
reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1));