diff --git a/doc/index.html b/doc/index.html
index 9c4336e..ce787c4 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -550,23 +550,24 @@ pre.pygments .tok-il { color: #666666 } /* Literal.Number.Integer.Long */
 <li><a href="#_boost_arch_arm">4.1.2. <code>BOOST_ARCH_ARM</code></a></li>
 <li><a href="#_boost_arch_blackfin">4.1.3. <code>BOOST_ARCH_BLACKFIN</code></a></li>
 <li><a href="#_boost_arch_convex">4.1.4. <code>BOOST_ARCH_CONVEX</code></a></li>
-<li><a href="#_boost_arch_ia64">4.1.5. <code>BOOST_ARCH_IA64</code></a></li>
-<li><a href="#_boost_arch_m68k">4.1.6. <code>BOOST_ARCH_M68K</code></a></li>
-<li><a href="#_boost_arch_mips">4.1.7. <code>BOOST_ARCH_MIPS</code></a></li>
-<li><a href="#_boost_arch_parisc">4.1.8. <code>BOOST_ARCH_PARISC</code></a></li>
-<li><a href="#_boost_arch_ppc">4.1.9. <code>BOOST_ARCH_PPC</code></a></li>
-<li><a href="#_boost_arch_ptx">4.1.10. <code>BOOST_ARCH_PTX</code></a></li>
-<li><a href="#_boost_arch_pyramid">4.1.11. <code>BOOST_ARCH_PYRAMID</code></a></li>
-<li><a href="#_boost_arch_riscv">4.1.12. <code>BOOST_ARCH_RISCV</code></a></li>
-<li><a href="#_boost_arch_rs6000">4.1.13. <code>BOOST_ARCH_RS6000</code></a></li>
-<li><a href="#_boost_arch_sparc">4.1.14. <code>BOOST_ARCH_SPARC</code></a></li>
-<li><a href="#_boost_arch_sh">4.1.15. <code>BOOST_ARCH_SH</code></a></li>
-<li><a href="#_boost_arch_sys370">4.1.16. <code>BOOST_ARCH_SYS370</code></a></li>
-<li><a href="#_boost_arch_sys390">4.1.17. <code>BOOST_ARCH_SYS390</code></a></li>
-<li><a href="#_boost_arch_x86">4.1.18. <code>BOOST_ARCH_X86</code></a></li>
-<li><a href="#_boost_arch_z">4.1.19. <code>BOOST_ARCH_Z</code></a></li>
-<li><a href="#_boost_arch_x86_32">4.1.20. <code>BOOST_ARCH_X86_32</code></a></li>
-<li><a href="#_boost_arch_x86_64">4.1.21. <code>BOOST_ARCH_X86_64</code></a></li>
+<li><a href="#_boost_arch_e2k">4.1.5. <code>BOOST_ARCH_E2K</code></a></li>
+<li><a href="#_boost_arch_ia64">4.1.6. <code>BOOST_ARCH_IA64</code></a></li>
+<li><a href="#_boost_arch_m68k">4.1.7. <code>BOOST_ARCH_M68K</code></a></li>
+<li><a href="#_boost_arch_mips">4.1.8. <code>BOOST_ARCH_MIPS</code></a></li>
+<li><a href="#_boost_arch_parisc">4.1.9. <code>BOOST_ARCH_PARISC</code></a></li>
+<li><a href="#_boost_arch_ppc">4.1.10. <code>BOOST_ARCH_PPC</code></a></li>
+<li><a href="#_boost_arch_ptx">4.1.11. <code>BOOST_ARCH_PTX</code></a></li>
+<li><a href="#_boost_arch_pyramid">4.1.12. <code>BOOST_ARCH_PYRAMID</code></a></li>
+<li><a href="#_boost_arch_riscv">4.1.13. <code>BOOST_ARCH_RISCV</code></a></li>
+<li><a href="#_boost_arch_rs6000">4.1.14. <code>BOOST_ARCH_RS6000</code></a></li>
+<li><a href="#_boost_arch_sparc">4.1.15. <code>BOOST_ARCH_SPARC</code></a></li>
+<li><a href="#_boost_arch_sh">4.1.16. <code>BOOST_ARCH_SH</code></a></li>
+<li><a href="#_boost_arch_sys370">4.1.17. <code>BOOST_ARCH_SYS370</code></a></li>
+<li><a href="#_boost_arch_sys390">4.1.18. <code>BOOST_ARCH_SYS390</code></a></li>
+<li><a href="#_boost_arch_x86">4.1.19. <code>BOOST_ARCH_X86</code></a></li>
+<li><a href="#_boost_arch_z">4.1.20. <code>BOOST_ARCH_Z</code></a></li>
+<li><a href="#_boost_arch_x86_32">4.1.21. <code>BOOST_ARCH_X86_32</code></a></li>
+<li><a href="#_boost_arch_x86_64">4.1.22. <code>BOOST_ARCH_X86_64</code></a></li>
 </ul>
 </li>
 <li><a href="#_boost_comp_compiler_macros">4.2. <code>BOOST_COMP</code> compiler macros</a>
@@ -1818,7 +1819,35 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_ia64"><a class="anchor" href="#_boost_arch_ia64"></a>4.1.5. <code>BOOST_ARCH_IA64</code></h4>
+<h4 id="_boost_arch_e2k"><a class="anchor" href="#_boost_arch_e2k"></a>4.1.5. <code>BOOST_ARCH_E2K</code></h4>
+<div class="paragraph">
+<p><a href="https://en.wikipedia.org/wiki/Elbrus_2000">E2K</a> architecture.</p>
+</div>
+<table class="tableblock frame-all grid-all stretch">
+<colgroup>
+<col style="width: 50%;">
+<col style="width: 50%;">
+</colgroup>
+<thead>
+<tr>
+<th class="tableblock halign-left valign-top">Symbol</th>
+<th class="tableblock halign-left valign-top">Version</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><code>__e2k__</code></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>detection</strong></p></td>
+</tr>
+<tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><code>__e2k__</code></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">V.0.0</p></td>
+</tr>
+</tbody>
+</table>
+</div>
+<div class="sect3">
+<h4 id="_boost_arch_ia64"><a class="anchor" href="#_boost_arch_ia64"></a>4.1.6. <code>BOOST_ARCH_IA64</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/Ia64">Intel Itanium 64</a> architecture.</p>
 </div>
@@ -1862,7 +1891,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_m68k"><a class="anchor" href="#_boost_arch_m68k"></a>4.1.6. <code>BOOST_ARCH_M68K</code></h4>
+<h4 id="_boost_arch_m68k"><a class="anchor" href="#_boost_arch_m68k"></a>4.1.7. <code>BOOST_ARCH_M68K</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/M68k">Motorola 68k</a> architecture.</p>
 </div>
@@ -1962,7 +1991,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_mips"><a class="anchor" href="#_boost_arch_mips"></a>4.1.7. <code>BOOST_ARCH_MIPS</code></h4>
+<h4 id="_boost_arch_mips"><a class="anchor" href="#_boost_arch_mips"></a>4.1.8. <code>BOOST_ARCH_MIPS</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/MIPS_architecture">MIPS</a> architecture.</p>
 </div>
@@ -2034,7 +2063,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_parisc"><a class="anchor" href="#_boost_arch_parisc"></a>4.1.8. <code>BOOST_ARCH_PARISC</code></h4>
+<h4 id="_boost_arch_parisc"><a class="anchor" href="#_boost_arch_parisc"></a>4.1.9. <code>BOOST_ARCH_PARISC</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/PA-RISC_family">HP/PA RISC</a> architecture.</p>
 </div>
@@ -2098,7 +2127,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_ppc"><a class="anchor" href="#_boost_arch_ppc"></a>4.1.9. <code>BOOST_ARCH_PPC</code></h4>
+<h4 id="_boost_arch_ppc"><a class="anchor" href="#_boost_arch_ppc"></a>4.1.10. <code>BOOST_ARCH_PPC</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/PowerPC">PowerPC</a> architecture.</p>
 </div>
@@ -2178,7 +2207,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_ptx"><a class="anchor" href="#_boost_arch_ptx"></a>4.1.10. <code>BOOST_ARCH_PTX</code></h4>
+<h4 id="_boost_arch_ptx"><a class="anchor" href="#_boost_arch_ptx"></a>4.1.11. <code>BOOST_ARCH_PTX</code></h4>
 <div class="paragraph">
 <p><a href="https://en.wikipedia.org/wiki/Parallel_Thread_Execution">PTX</a> architecture.</p>
 </div>
@@ -2206,7 +2235,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_pyramid"><a class="anchor" href="#_boost_arch_pyramid"></a>4.1.11. <code>BOOST_ARCH_PYRAMID</code></h4>
+<h4 id="_boost_arch_pyramid"><a class="anchor" href="#_boost_arch_pyramid"></a>4.1.12. <code>BOOST_ARCH_PYRAMID</code></h4>
 <div class="paragraph">
 <p>Pyramid 9810 architecture.</p>
 </div>
@@ -2230,7 +2259,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_riscv"><a class="anchor" href="#_boost_arch_riscv"></a>4.1.12. <code>BOOST_ARCH_RISCV</code></h4>
+<h4 id="_boost_arch_riscv"><a class="anchor" href="#_boost_arch_riscv"></a>4.1.13. <code>BOOST_ARCH_RISCV</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/RISC-V">RISC-V</a> architecture.</p>
 </div>
@@ -2254,7 +2283,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_rs6000"><a class="anchor" href="#_boost_arch_rs6000"></a>4.1.13. <code>BOOST_ARCH_RS6000</code></h4>
+<h4 id="_boost_arch_rs6000"><a class="anchor" href="#_boost_arch_rs6000"></a>4.1.14. <code>BOOST_ARCH_RS6000</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/RS/6000">RS/6000</a> architecture.</p>
 </div>
@@ -2294,7 +2323,7 @@ and "Y", "M", "D" for dates.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_sparc"><a class="anchor" href="#_boost_arch_sparc"></a>4.1.14. <code>BOOST_ARCH_SPARC</code></h4>
+<h4 id="_boost_arch_sparc"><a class="anchor" href="#_boost_arch_sparc"></a>4.1.15. <code>BOOST_ARCH_SPARC</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/SPARC">SPARC</a> architecture.</p>
 </div>
@@ -2323,14 +2352,22 @@ and "Y", "M", "D" for dates.</p>
 <td class="tableblock halign-left valign-top"><p class="tableblock">9.0.0</p></td>
 </tr>
 <tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><code>__sparc_v9__</code></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">9.0.0</p></td>
+</tr>
+<tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>__sparcv8</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">8.0.0</p></td>
 </tr>
+<tr>
+<td class="tableblock halign-left valign-top"><p class="tableblock"><code>__sparc_v8__</code></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">8.0.0</p></td>
+</tr>
 </tbody>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_sh"><a class="anchor" href="#_boost_arch_sh"></a>4.1.15. <code>BOOST_ARCH_SH</code></h4>
+<h4 id="_boost_arch_sh"><a class="anchor" href="#_boost_arch_sh"></a>4.1.16. <code>BOOST_ARCH_SH</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/SuperH">SuperH</a> architecture:
 If available versions [1-5] are specifically detected.</p>
@@ -2379,7 +2416,7 @@ If available versions [1-5] are specifically detected.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_sys370"><a class="anchor" href="#_boost_arch_sys370"></a>4.1.16. <code>BOOST_ARCH_SYS370</code></h4>
+<h4 id="_boost_arch_sys370"><a class="anchor" href="#_boost_arch_sys370"></a>4.1.17. <code>BOOST_ARCH_SYS370</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/System/370">System/370</a> architecture.</p>
 </div>
@@ -2407,7 +2444,7 @@ If available versions [1-5] are specifically detected.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_sys390"><a class="anchor" href="#_boost_arch_sys390"></a>4.1.17. <code>BOOST_ARCH_SYS390</code></h4>
+<h4 id="_boost_arch_sys390"><a class="anchor" href="#_boost_arch_sys390"></a>4.1.18. <code>BOOST_ARCH_SYS390</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/System/390">System/390</a> architecture.</p>
 </div>
@@ -2435,7 +2472,7 @@ If available versions [1-5] are specifically detected.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_x86"><a class="anchor" href="#_boost_arch_x86"></a>4.1.18. <code>BOOST_ARCH_X86</code></h4>
+<h4 id="_boost_arch_x86"><a class="anchor" href="#_boost_arch_x86"></a>4.1.19. <code>BOOST_ARCH_X86</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/X86">Intel x86</a> architecture. This is
 a category to indicate that either <code>BOOST_ARCH_X86_32</code> or
@@ -2443,7 +2480,7 @@ a category to indicate that either <code>BOOST_ARCH_X86_32</code> or
 </div>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_z"><a class="anchor" href="#_boost_arch_z"></a>4.1.19. <code>BOOST_ARCH_Z</code></h4>
+<h4 id="_boost_arch_z"><a class="anchor" href="#_boost_arch_z"></a>4.1.20. <code>BOOST_ARCH_Z</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/Z/Architecture">z/Architecture</a> architecture.</p>
 </div>
@@ -2467,7 +2504,7 @@ a category to indicate that either <code>BOOST_ARCH_X86_32</code> or
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_x86_32"><a class="anchor" href="#_boost_arch_x86_32"></a>4.1.20. <code>BOOST_ARCH_X86_32</code></h4>
+<h4 id="_boost_arch_x86_32"><a class="anchor" href="#_boost_arch_x86_32"></a>4.1.21. <code>BOOST_ARCH_X86_32</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/X86">Intel x86</a> architecture:
 If available versions [3-6] are specifically detected.</p>
@@ -2556,7 +2593,7 @@ If available versions [3-6] are specifically detected.</p>
 </table>
 </div>
 <div class="sect3">
-<h4 id="_boost_arch_x86_64"><a class="anchor" href="#_boost_arch_x86_64"></a>4.1.21. <code>BOOST_ARCH_X86_64</code></h4>
+<h4 id="_boost_arch_x86_64"><a class="anchor" href="#_boost_arch_x86_64"></a>4.1.22. <code>BOOST_ARCH_X86_64</code></h4>
 <div class="paragraph">
 <p><a href="https://en.wikipedia.org/wiki/X86-64">X86-64</a> architecture.</p>
 </div>
diff --git a/doc/predef.adoc b/doc/predef.adoc
index 85566b9..850d48d 100644
--- a/doc/predef.adoc
+++ b/doc/predef.adoc
@@ -564,6 +564,8 @@ include::../include/boost/predef/architecture/blackfin.h[tag=reference]
 
 include::../include/boost/predef/architecture/convex.h[tag=reference]
 
+include::../include/boost/predef/architecture/e2k.h[tag=reference]
+
 include::../include/boost/predef/architecture/ia64.h[tag=reference]
 
 include::../include/boost/predef/architecture/m68k.h[tag=reference]