Add {<spanclass="parameter">s1p</span>, <spanclass="parameter">n</span>} and {<spanclass="parameter">s2p</span>, <spanclass="parameter">n</span>}, and write the <spanclass="parameter">n</span> least significant limbs of the result to <spanclass="parameter">rp</span>.
</pre></div></div></div><scripttype="text/javascript">AddLanguageTabSet("ID0EDCA");</script><h4class="subHeading">Parameters</h4><dl><dt><spanclass="parameter">rp</span></dt><dd>Type:<ahref="4609ac5e-5cf9-cd20-2fa9-8040101c165c.htm">Math.Gmp.Native<spanid="LST2C745DC2_1"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_ptr</a><br/>The result integer.</dd><dt><spanclass="parameter">s1p</span></dt><dd>Type:<ahref="4609ac5e-5cf9-cd20-2fa9-8040101c165c.htm">Math.Gmp.Native<spanid="LST2C745DC2_2"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_ptr</a><br/>The first operand integer.</dd><dt><spanclass="parameter">s2p</span></dt><dd>Type:<ahref="4609ac5e-5cf9-cd20-2fa9-8040101c165c.htm">Math.Gmp.Native<spanid="LST2C745DC2_3"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_3?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_ptr</a><br/>The second operand integer.</dd><dt><spanclass="parameter">n</span></dt><dd>Type:<ahref="4b58a584-7a0e-b600-18fa-ebd493861eb3.htm">Math.Gmp.Native<spanid="LST2C745DC2_4"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_size_t</a><br/>The number of limbs in <spanclass="parameter">s1p</span> and <spanclass="parameter">s2p</span>.</dd></dl><h4class="subHeading">Return Value</h4>Type:<ahref="bf1f694d-f9b2-6413-12e5-ebae603d5b49.htm">mp_limb_t</a><br/>Return carry, either <spanclass="code">0</span> or <spanclass="code">1</span>.</div><divclass="collapsibleAreaRegion"><spanclass="collapsibleRegionTitle"onclick="SectionExpandCollapse('ID2RB')"onkeypress="SectionExpandCollapse_CheckKey('ID2RB', event)"tabindex="0"><imgid="ID2RBToggle"class="collapseToggle"src="../icons/SectionExpanded.png"/>Remarks</span></div><divid="ID2RBSection"class="collapsibleSection"><p>
This is the lowest-level function for addition.
It is the preferred function for addition, since it is written in assembly for most CPUs.
For addition of a variable to itself (i.e., <spanclass="parameter">s1p</span> equals <spanclass="parameter">s2p</span>)
use <ahref="b52f3ab3-7ad3-7dde-14a2-83c81840b829.htm">mpn_lshift(mp_ptr, mp_ptr, mp_size_t, UInt32)</a> with a count of <spanclass="code">1</span> for optimal speed.
mp_ptr rp = <spanclass="highlight-keyword">new</span> mp_ptr(<spanclass="highlight-keyword">new</span><spanclass="highlight-keyword">uint</span>[<spanclass="highlight-number">2</span>]);
mp_ptr result = <spanclass="highlight-keyword">new</span> mp_ptr(<spanclass="highlight-keyword">new</span><spanclass="highlight-keyword">uint</span>[] { <spanclass="highlight-number">0x00000000</span>, <spanclass="highlight-number">0x00000000</span> });
<spanclass="highlight-comment">// Set rp = s1 + s2.</span>
gmp_lib.free(rp, s1p, s2p, result)</pre></div><divid="ID0EDAABA_code_Div3"class="codeSnippetContainerCode"style="display: none"><p>No code example is currently available or this language may not be supported.</p></div><divid="ID0EDAABA_code_Div4"class="codeSnippetContainerCode"style="display: none"><p>No code example is currently available or this language may not be supported.</p></div></div></div><scripttype="text/javascript">AddLanguageTabSet("ID0EDAABA");</script></div><divclass="collapsibleAreaRegion"id="seeAlsoSection"><spanclass="collapsibleRegionTitle"onclick="SectionExpandCollapse('ID4RB')"onkeypress="SectionExpandCollapse_CheckKey('ID4RB', event)"tabindex="0"><imgid="ID4RBToggle"class="collapseToggle"src="../icons/SectionExpanded.png"/>See Also</span></div><divid="ID4RBSection"class="collapsibleSection"><h4class="subHeading">Reference</h4><divclass="seeAlsoStyle"><ahref="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm">gmp_lib Class</a></div><divclass="seeAlsoStyle"><ahref="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm">Math.Gmp.Native Namespace</a></div><divclass="seeAlsoStyle"><ahref="b9df04c4-224e-f2ad-8e90-fbb3b30bd76d.htm">gmp_lib<spanid="LST2C745DC2_5"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_5?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_add(mp_ptr, mp_ptr, mp_size_t, mp_ptr, mp_size_t)</a></div><divclass="seeAlsoStyle"><ahref="5562b14f-48a4-be75-2eb0-6a129cd0d5ab.htm">gmp_lib<spanid="LST2C745DC2_6"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_6?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_add_1(mp_ptr, mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="77fdf32b-986d-4df3-3c76-022e3e3fbb98.htm">gmp_lib<spanid="LST2C745DC2_7"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_7?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_addmul_1(mp_ptr, mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="75f2a84e-44f3-b7cc-e6ad-392111d5b9cc.htm">gmp_lib<spanid="LST2C745DC2_8"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_8?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_divexact_by3(mp_ptr, mp_ptr, mp_size_t)</a></div><divclass="seeAlsoStyle"><ahref="c40ea3de-d1be-146b-fe7a-deff566ca817.htm">gmp_lib<spanid="LST2C745DC2_9"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_9?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_divexact_by3c(mp_ptr, mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="9074a45b-0d68-cf18-75fe-076e720a9a61.htm">gmp_lib<spanid="LST2C745DC2_10"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_10?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_divmod_1(mp_ptr, mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="f5c3f25d-1ad5-b3be-fc4b-280a62869912.htm">gmp_lib<spanid="LST2C745DC2_11"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_11?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_divrem_1(mp_ptr, mp_size_t, mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="9aa24cc8-8cf5-4b8a-cd1b-5ded400efa50.htm">gmp_lib<spanid="LST2C745DC2_12"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_12?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_mod_1(mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="68d3161d-2909-1909-cda7-e87949ee27ce.htm">gmp_lib<spanid="LST2C745DC2_13"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_13?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_mul(mp_ptr, mp_ptr, mp_size_t, mp_ptr, mp_size_t)</a></div><divclass="seeAlsoStyle"><ahref="b819fb3b-5d3e-ff23-1687-0e71af684bd7.htm">gmp_lib<spanid="LST2C745DC2_14"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST2C745DC2_14?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpn_mul_1(mp_ptr, mp_ptr, mp_size_t, mp_limb_t)</a></div><divclass="seeAlsoStyle"><ahref="ee321a9a-852a-993e-f602-72ff2af02ff6.htm">gmp_lib<spanid="LST2C745DC2_15"></span><script
