36  * in "out" and returning the carry in 'carry' parameter on success. This
61 		       word_t *carry)  in _nn_cnd_add()  argument
68 	MUST_HAVE((carry != NULL), ret, err);  in _nn_cnd_add()
80 	/* Perform addition one word at a time, propagating the carry. */  in _nn_cnd_add()
86 		/* There is at most one carry going out. */  in _nn_cnd_add()
90 	(*carry) = _carry;  in _nn_cnd_add()
98  * in "out", including the potential carry overflowing past the maximal
112  * For finer carry propagation and length control the internal "_nn_cnd_add"
121 	word_t carry;  in nn_cnd_add()  local
124 	ret = _nn_cnd_add(cnd, out, in1, in2, &carry); EG(ret, err);  in nn_cnd_add()
126 	/* We cannot allow a non-zero carry if out->wlen is at its limit */  in nn_cnd_add()
127 	MUST_HAVE(((out->wlen != NN_MAX_WORD_LEN) || (!carry)), ret, err);  in nn_cnd_add()
131 		 * To maintain constant time, we perform carry addition in all  in nn_cnd_add()
132 		 * cases. If carry is 0, no change is performed in practice,  in nn_cnd_add()
137 		out->val[out->wlen] = carry;  in nn_cnd_add()
138 		out->wlen = (u8)(out->wlen + carry);  in nn_cnd_add()
147  * including the potential carry overflowing past the maximal length of
181 	word_t carry, tmp;  in nn_add_word()  local
195 	/* No matter its value, propagate the carry. */  in nn_add_word()
196 	carry = w;  in nn_add_word()
198 		tmp = (word_t)(in1->val[i] + carry);  in nn_add_word()
199 		carry = (word_t)(tmp < in1->val[i]);  in nn_add_word()
203 	MUST_HAVE(((out->wlen != NN_MAX_WORD_LEN) || (!carry)), ret, err);  in nn_add_word()
206 		 * To maintain constant time, we perform carry addition in all  in nn_add_word()
207 		 * cases. If carry is 0, no change is performed in practice,  in nn_add_word()
212 		out->val[out->wlen] = carry;  in nn_add_word()
213 		out->wlen = (u8)(out->wlen + carry);  in nn_add_word()
346 	MUST_HAVE((p->wlen < NN_MAX_WORD_LEN), ret, err); /* otherwise carry could overflow */  in _nn_mod_add()
357 	 * We could also use _nn_cnd_add to catch the carry and deal  in _nn_mod_add()
360 	 * of in1 and in2 so getting a carry out does not necessarily mean  in _nn_mod_add()
413 	MUST_HAVE((p->wlen < NN_MAX_WORD_LEN), ret, err); /* otherwise carry could overflow */  in _nn_mod_inc()
472 	MUST_HAVE((p->wlen < NN_MAX_WORD_LEN), ret, err); /* otherwise carry could overflow */  in _nn_mod_sub()
539 	MUST_HAVE((p->wlen < NN_MAX_WORD_LEN), ret, err); /* otherwise carry could overflow */  in _nn_mod_dec()