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MIPS-assembly-options.html 4.4KB

il y a 3 ans
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  15. <title>MIPS assembly options (Using as)</title>
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  24. <link href="MIPS_002dDependent.html#MIPS_002dDependent" rel="up" title="MIPS-Dependent">
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  56. <a name="MIPS-assembly-options"></a>
  57. <div class="header">
  58. <p>
  59. Next: <a href="MIPS-autoextend.html#MIPS-autoextend" accesskey="n" rel="next">MIPS autoextend</a>, Previous: <a href="MIPS-ISA.html#MIPS-ISA" accesskey="p" rel="prev">MIPS ISA</a>, Up: <a href="MIPS_002dDependent.html#MIPS_002dDependent" accesskey="u" rel="up">MIPS-Dependent</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
  60. </div>
  61. <hr>
  62. <a name="Directives-to-control-code-generation"></a>
  63. <h4 class="subsection">9.27.6 Directives to control code generation</h4>
  64. <a name="index-MIPS-directives-to-override-command_002dline-options"></a>
  65. <a name="index-_002emodule"></a>
  66. <p>The <code>.module</code> directive allows command-line options to be set directly
  67. from assembly. The format of the directive matches the <code>.set</code>
  68. directive but only those options which are relevant to a whole module are
  69. supported. The effect of a <code>.module</code> directive is the same as the
  70. corresponding command-line option. Where <code>.set</code> directives support
  71. returning to a default then the <code>.module</code> directives do not as they
  72. define the defaults.
  73. </p>
  74. <p>These module-level directives must appear first in assembly.
  75. </p>
  76. <p>Traditional MIPS assemblers do not support this directive.
  77. </p>
  78. <a name="index-MIPS-32_002dbit-microMIPS-instruction-generation-override"></a>
  79. <a name="index-_002eset-insn32"></a>
  80. <a name="index-_002eset-noinsn32"></a>
  81. <p>The directive <code>.set insn32</code> makes the assembler only use 32-bit
  82. instruction encodings when generating code for the microMIPS processor.
  83. This directive inhibits the use of any 16-bit instructions from that
  84. point on in the assembly. The <code>.set noinsn32</code> directive allows
  85. 16-bit instructions to be accepted.
  86. </p>
  87. <p>Traditional MIPS assemblers do not support this directive.
  88. </p>
  89. </body>
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