CRIS_002dSymbols.html 4.7 KB

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  63. <a name="Symbols-3"></a>
  64. <h4 class="subsection">9.8.3 Symbols</h4>
  65. <a name="index-Symbols_002c-built_002din_002c-CRIS"></a>
  66. <a name="index-Symbols_002c-CRIS_002c-built_002din"></a>
  67. <a name="index-CRIS-built_002din-symbols"></a>
  68. <a name="index-Built_002din-symbols_002c-CRIS"></a>
  69. <p>Some symbols are defined by the assembler. They&rsquo;re intended to
  70. be used in conditional assembly, for example:
  71. </p><div class="smallexample">
  72. <pre class="smallexample"> .if ..asm.arch.cris.v32
  73. <var>code for CRIS v32</var>
  74. .elseif ..asm.arch.cris.common_v10_v32
  75. <var>code common to CRIS v32 and CRIS v10</var>
  76. .elseif ..asm.arch.cris.v10 | ..asm.arch.cris.any_v0_v10
  77. <var>code for v10</var>
  78. .else
  79. .error &quot;Code needs to be added here.&quot;
  80. .endif
  81. </pre></div>
  82. <p>These symbols are defined in the assembler, reflecting
  83. command-line options, either when specified or the default.
  84. They are always defined, to 0 or 1.
  85. </p><dl compact="compact">
  86. <dt><code>..asm.arch.cris.any_v0_v10</code></dt>
  87. <dd><p>This symbol is non-zero when <samp>--march=v0_v10</samp> is specified
  88. or the default.
  89. </p>
  90. </dd>
  91. <dt><code>..asm.arch.cris.common_v10_v32</code></dt>
  92. <dd><p>Set according to the option <samp>--march=common_v10_v32</samp>.
  93. </p>
  94. </dd>
  95. <dt><code>..asm.arch.cris.v10</code></dt>
  96. <dd><p>Reflects the option <samp>--march=v10</samp>.
  97. </p>
  98. </dd>
  99. <dt><code>..asm.arch.cris.v32</code></dt>
  100. <dd><p>Corresponds to <samp>--march=v10</samp>.
  101. </p></dd>
  102. </dl>
  103. <p>Speaking of symbols, when a symbol is used in code, it can have
  104. a suffix modifying its value for use in position-independent
  105. code. See <a href="CRIS_002dPic.html#CRIS_002dPic">CRIS-Pic</a>.
  106. </p>
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