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  26 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
  27 <a name="math_toolkit.config_macros"></a><a class="link" href="config_macros.html" title="Configuration Macros">Configuration Macros</a>
  28 </h2></div></div></div>
  29 <p>
  30       Almost all configuration details are set up automatically by <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">boost</span><span class="special">\</span><span class="identifier">math</span><span class="special">\</span><span class="identifier">tools</span><span class="special">\</span><span class="identifier">config</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>.
  31     </p>
  32 <p>
  33       In normal use, only policy configuration macros are likely to be used. See
  34       <a class="link" href="pol_ref.html" title="Policy Reference">policy reference</a>.
  35     </p>
  36 <p>
  37       For reference, information on Boost.Math macros used internally are described
  38       briefly below.
  39     </p>
  40 <div class="table">
  41 <a name="math_toolkit.config_macros.boost_math_macros"></a><p class="title"><b>Table&#160;1.11.&#160;Boost.Math Macros</b></p>
  42 <div class="table-contents"><table class="table" summary="Boost.Math Macros">
  43 <colgroup>
  44 <col>
  45 <col>
  46 </colgroup>
  47 <thead><tr>
  48 <th>
  49               <p>
  50                 MACRO
  51               </p>
  52             </th>
  53 <th>
  54               <p>
  55                 Notes
  56               </p>
  57             </th>
  58 </tr></thead>
  59 <tbody>
  60 <tr>
  61 <td>
  62               <p>
  63                 <code class="computeroutput"><span class="identifier">BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS</span></code>
  64               </p>
  65             </td>
  66 <td>
  67               <p>
  68                 Do not produce or use long double functions: this macro gets set
  69                 when the platform's long double or standard library long double support
  70                 is absent or buggy.
  71               </p>
  72             </td>
  73 </tr>
  74 <tr>
  75 <td>
  76               <p>
  77                 <code class="computeroutput"><span class="identifier">BOOST_MATH_USE_FLOAT128</span></code>
  78               </p>
  79             </td>
  80 <td>
  81               <p>
  82                 When set the numeric constants support the <code class="computeroutput"><span class="identifier">__float128</span></code>
  83                 data type with constants having the <code class="computeroutput"><span class="identifier">Q</span></code>
  84                 suffix.
  85               </p>
  86             </td>
  87 </tr>
  88 <tr>
  89 <td>
  90               <p>
  91                 <code class="computeroutput"><span class="identifier">BOOST_MATH_DISABLE_FLOAT128</span></code>
  92               </p>
  93             </td>
  94 <td>
  95               <p>
  96                 When set the numeric constants do not use the <code class="computeroutput"><span class="identifier">__float128</span></code>
  97                 data type even if the compiler appears to support it.
  98               </p>
  99             </td>
 100 </tr>
 101 <tr>
 102 <td>
 103               <p>
 104                 <code class="computeroutput"><span class="identifier">BOOST_MATH_NO_REAL_CONCEPT_TESTS</span></code>
 105               </p>
 106             </td>
 107 <td>
 108               <p>
 109                 Do not try to use real concept tests (hardware or software does not
 110                 support real_concept type).
 111               </p>
 112             </td>
 113 </tr>
 114 <tr>
 115 <td>
 116               <p>
 117                 <code class="computeroutput"><span class="identifier">BOOST_MATH_CONTROL_FP</span></code>
 118               </p>
 119             </td>
 120 <td>
 121               <p>
 122                 Controls FP hardware exceptions - our tests don't support hardware
 123                 exceptions on MSVC. May get set to something like: <code class="computeroutput"> <span class="identifier">_control87</span><span class="special">(</span><span class="identifier">MCW_EM</span><span class="special">,</span><span class="identifier">MCW_EM</span><span class="special">)</span></code>.
 124               </p>
 125             </td>
 126 </tr>
 127 <tr>
 128 <td>
 129               <p>
 130                 <code class="computeroutput"><span class="identifier">BOOST_MATH_NO_DEDUCED_FUNCTION_POINTERS</span></code>
 131               </p>
 132             </td>
 133 <td>
 134               <p>
 135                 This macro is used by our test cases, it is set when an assignment
 136                 of a function template to a function pointer requires explicit template
 137                 arguments to be provided on the function name.
 138               </p>
 139             </td>
 140 </tr>
 141 <tr>
 142 <td>
 143               <p>
 144                 <code class="computeroutput"><span class="identifier">BOOST_MATH_USE_C99</span></code>
 145               </p>
 146             </td>
 147 <td>
 148               <p>
 149                 Use C99 math functions.
 150               </p>
 151             </td>
 152 </tr>
 153 <tr>
 154 <td>
 155               <p>
 156                 <code class="computeroutput"><span class="identifier">BOOST_NO_NATIVE_LONG_DOUBLE_FP_CLASSIFY</span></code>
 157               </p>
 158             </td>
 159 <td>
 160               <p>
 161                 define if no native (or buggy) <code class="computeroutput"><span class="identifier">fpclassify</span><span class="special">(</span><span class="keyword">long</span> <span class="keyword">double</span><span class="special">)</span></code>
 162                 even though the other C99 functions are present.
 163               </p>
 164             </td>
 165 </tr>
 166 <tr>
 167 <td>
 168               <p>
 169                 <code class="computeroutput"><span class="identifier">BOOST_MATH_SMALL_CONSTANT</span><span class="special">(</span><span class="identifier">x</span><span class="special">)</span></code>
 170               </p>
 171             </td>
 172 <td>
 173               <p>
 174                 Helper macro used in our test cases to set underflowing constants
 175                 set to zero if this would cause compiler issues.
 176               </p>
 177             </td>
 178 </tr>
 179 <tr>
 180 <td>
 181               <p>
 182                 <code class="computeroutput"><span class="identifier">BOOST_MATH_BUGGY_LARGE_FLOAT_CONSTANTS</span></code>
 183               </p>
 184             </td>
 185 <td>
 186               <p>
 187                 Set if constants too large for a float, will cause "bad"
 188                 values to be stored in the data, rather than infinity or a suitably
 189                 large value.
 190               </p>
 191             </td>
 192 </tr>
 193 <tr>
 194 <td>
 195               <p>
 196                 <code class="computeroutput"><span class="identifier">BOOST_MATH_STD_USING</span></code>
 197               </p>
 198             </td>
 199 <td>
 200               <p>
 201                 Provides <code class="computeroutput"><span class="keyword">using</span></code> statements
 202                 for many std:: (abs to sqrt) and boost::math (rounds, modf) functions.
 203                 This allows these functions to be called unqualified so that if
 204                 <a href="http://en.wikipedia.org/wiki/Argument-dependent_name_lookup" target="_top">argument-dependent
 205                 Argument Dependent Lookup</a> fails to find a suitable overload,
 206                 then the std:: versions will also be considered.
 207               </p>
 208             </td>
 209 </tr>
 210 <tr>
 211 <td>
 212               <p>
 213                 <code class="computeroutput"><span class="identifier">BOOST_FPU_EXCEPTION_GUARD</span></code>
 214               </p>
 215             </td>
 216 <td>
 217               <p>
 218                 Used at the entrypoint to each special function to reset all FPU
 219                 exception flags prior to internal calculations, and then merge the
 220                 old and new exception flags on function exit. Used as a workaround
 221                 on platforms or hardware that behave strangely if any FPU exception
 222                 flags are set when calling standard library functions.
 223               </p>
 224             </td>
 225 </tr>
 226 <tr>
 227 <td>
 228               <p>
 229                 <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT</span></code>
 230               </p>
 231             </td>
 232 <td>
 233               <p>
 234                 Define to output diagnostics for math functions. This is rather 'global'
 235                 to Boost.Math and so coarse-grained that it will probably produce
 236                 copious output! (Especially because full precision values are output).
 237                 Designed primarily for internal use and development.
 238               </p>
 239             </td>
 240 </tr>
 241 <tr>
 242 <td>
 243               <p>
 244                 <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT_CODE</span><span class="special">(</span><span class="identifier">x</span><span class="special">)</span></code>
 245               </p>
 246             </td>
 247 <td>
 248               <p>
 249                 Output selected named variable, for example <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT_CODE</span><span class="special">(</span><span class="string">"guess = "</span>
 250                 <span class="special">&lt;&lt;</span> <span class="identifier">guess</span><span class="special">)</span></code>; Used by <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT</span></code>
 251               </p>
 252             </td>
 253 </tr>
 254 <tr>
 255 <td>
 256               <p>
 257                 <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT_VARIABLE</span><span class="special">(</span><span class="identifier">name</span><span class="special">)</span></code>
 258               </p>
 259             </td>
 260 <td>
 261               <p>
 262                 Output selected variable, for example <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT_VARIABLE</span><span class="special">(</span><span class="identifier">result</span><span class="special">);</span></code> Used by <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT</span></code>
 263               </p>
 264             </td>
 265 </tr>
 266 <tr>
 267 <td>
 268               <p>
 269                 <code class="computeroutput"><span class="identifier">BOOST_MATH_INSTRUMENT_FPU</span></code>
 270               </p>
 271             </td>
 272 <td>
 273               <p>
 274                 Output the state of the FPU's control flags.
 275               </p>
 276             </td>
 277 </tr>
 278 </tbody>
 279 </table></div>
 280 </div>
 281 <br class="table-break"><div class="table">
 282 <a name="math_toolkit.config_macros.boost_math_tuning"></a><p class="title"><b>Table&#160;1.12.&#160;Boost.Math Tuning</b></p>
 283 <div class="table-contents"><table class="table" summary="Boost.Math Tuning">
 284 <colgroup>
 285 <col>
 286 <col>
 287 </colgroup>
 288 <thead><tr>
 289 <th>
 290               <p>
 291                 Macros for Tuning performance options for specific compilers
 292               </p>
 293             </th>
 294 <th>
 295               <p>
 296                 Notes
 297               </p>
 298             </th>
 299 </tr></thead>
 300 <tbody>
 301 <tr>
 302 <td>
 303               <p>
 304                 <code class="computeroutput"><span class="identifier">BOOST_MATH_POLY_METHOD</span></code>
 305               </p>
 306             </td>
 307 <td>
 308               <p>
 309                 See the <a class="link" href="tuning.html" title="Performance Tuning Macros">performance tuning section</a>.
 310               </p>
 311             </td>
 312 </tr>
 313 <tr>
 314 <td>
 315               <p>
 316                 <code class="computeroutput"><span class="identifier">BOOST_MATH_RATIONAL_METHOD</span></code>
 317               </p>
 318             </td>
 319 <td>
 320               <p>
 321                 See the <a class="link" href="tuning.html" title="Performance Tuning Macros">performance tuning section</a>.
 322               </p>
 323             </td>
 324 </tr>
 325 <tr>
 326 <td>
 327               <p>
 328                 <code class="computeroutput"><span class="identifier">BOOST_MATH_MAX_POLY_ORDER</span></code>
 329               </p>
 330             </td>
 331 <td>
 332               <p>
 333                 See the <a class="link" href="tuning.html" title="Performance Tuning Macros">performance tuning section</a>.
 334               </p>
 335             </td>
 336 </tr>
 337 <tr>
 338 <td>
 339               <p>
 340                 <code class="computeroutput"><span class="identifier">BOOST_MATH_INT_TABLE_TYPE</span></code>
 341               </p>
 342             </td>
 343 <td>
 344               <p>
 345                 See the <a class="link" href="tuning.html" title="Performance Tuning Macros">performance tuning section</a>.
 346               </p>
 347             </td>
 348 </tr>
 349 <tr>
 350 <td>
 351               <p>
 352                 <code class="computeroutput"><span class="identifier">BOOST_MATH_INT_VALUE_SUFFIX</span></code>
 353               </p>
 354             </td>
 355 <td>
 356               <p>
 357                 Helper macro for appending the correct suffix to integer constants
 358                 which may actually be stored as reals depending on the value of BOOST_MATH_INT_TABLE_TYPE.
 359               </p>
 360             </td>
 361 </tr>
 362 </tbody>
 363 </table></div>
 364 </div>
 365 <br class="table-break">
 366 </div>
 367 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 368 <td align="left"></td>
 369 <td align="right"><div class="copyright-footer">Copyright &#169; 2006-2010, 2012-2014 Nikhar Agrawal,
 370       Anton Bikineev, Paul A. Bristow, Marco Guazzone, Christopher Kormanyos, Hubert
 371       Holin, Bruno Lalande, John Maddock, Jeremy Murphy, Johan R&#229;de, Gautam Sewani,
 372       Benjamin Sobotta, Thijs van den Berg, Daryle Walker and Xiaogang Zhang<p>
 373         Distributed under the Boost Software License, Version 1.0. (See accompanying
 374         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
 375       </p>
 376 </div></td>
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