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3 年之前
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  62. <a name="g_t_002edc_005bsize_005d-expressions"></a>
  63. <h3 class="section">7.13 <code>.dc[<var>size</var>] <var>expressions</var></code></h3>
  64. <a name="index-dc-directive"></a>
  65. <p>The <code>.dc</code> directive expects zero or more <var>expressions</var> separated by
  66. commas. These expressions are evaluated and their values inserted into the
  67. current section. The size of the emitted value depends upon the suffix to the
  68. <code>.dc</code> directive:
  69. </p>
  70. <dl compact="compact">
  71. <dt><code>&lsquo;<samp>.a</samp>&rsquo;</code></dt>
  72. <dd><p>Emits N-bit values, where N is the size of an address on the target system.
  73. </p></dd>
  74. <dt><code>&lsquo;<samp>.b</samp>&rsquo;</code></dt>
  75. <dd><p>Emits 8-bit values.
  76. </p></dd>
  77. <dt><code>&lsquo;<samp>.d</samp>&rsquo;</code></dt>
  78. <dd><p>Emits double precision floating-point values.
  79. </p></dd>
  80. <dt><code>&lsquo;<samp>.l</samp>&rsquo;</code></dt>
  81. <dd><p>Emits 32-bit values.
  82. </p></dd>
  83. <dt><code>&lsquo;<samp>.s</samp>&rsquo;</code></dt>
  84. <dd><p>Emits single precision floating-point values.
  85. </p></dd>
  86. <dt><code>&lsquo;<samp>.w</samp>&rsquo;</code></dt>
  87. <dd><p>Emits 16-bit values.
  88. Note - this is true even on targets where the <code>.word</code> directive would emit
  89. 32-bit values.
  90. </p></dd>
  91. <dt><code>&lsquo;<samp>.x</samp>&rsquo;</code></dt>
  92. <dd><p>Emits long double precision floating-point values.
  93. </p></dd>
  94. </dl>
  95. <p>If no suffix is used then &lsquo;<samp>.w</samp>&rsquo; is assumed.
  96. </p>
  97. <p>The byte ordering is target dependent, as is the size and format of floating
  98. point values.
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