NDS32_002dRegs.html 4.1 KB

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  63. <a name="Register-Names-12"></a>
  64. <h4 class="subsubsection">9.30.2.2 Register Names</h4>
  65. <dl compact="compact">
  66. <dt><code>General purpose registers (GPR)</code></dt>
  67. <dd><p>There are 32 32-bit general purpose registers $r0 to $r31.
  68. </p>
  69. </dd>
  70. <dt><code>Accumulators d0 and d1</code></dt>
  71. <dd><p>64-bit accumulators: $d0.hi, $d0.lo, $d1.hi, and $d1.lo.
  72. </p>
  73. </dd>
  74. <dt><code>Assembler reserved register $ta</code></dt>
  75. <dd><p>Register $ta ($r15) is reserved for assembler using.
  76. </p>
  77. </dd>
  78. <dt><code>Operating system reserved registers $p0 and $p1</code></dt>
  79. <dd><p>Registers $p0 ($r26) and $p1 ($r27) are used by operating system as scratch
  80. registers.
  81. </p>
  82. </dd>
  83. <dt><code>Frame pointer $fp</code></dt>
  84. <dd><p>Register $r28 is regarded as the frame pointer.
  85. </p>
  86. </dd>
  87. <dt><code>Global pointer</code></dt>
  88. <dd><p>Register $r29 is regarded as the global pointer.
  89. </p>
  90. </dd>
  91. <dt><code>Link pointer</code></dt>
  92. <dd><p>Register $r30 is regarded as the link pointer.
  93. </p>
  94. </dd>
  95. <dt><code>Stack pointer</code></dt>
  96. <dd><p>Register $r31 is regarded as the stack pointer.
  97. </p></dd>
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