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  61. <a name="Add-Options"></a>
  62. <div class="header">
  63. <p>
  64. Next: <a href="Require-Support.html#Require-Support" accesskey="n" rel="next">Require Support</a>, Previous: <a href="Effective_002dTarget-Keywords.html#Effective_002dTarget-Keywords" accesskey="p" rel="prev">Effective-Target Keywords</a>, Up: <a href="Test-Directives.html#Test-Directives" accesskey="u" rel="up">Test Directives</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
  65. </div>
  66. <hr>
  67. <a name="Features-for-dg_002dadd_002doptions"></a>
  68. <h4 class="subsection">7.2.4 Features for <code>dg-add-options</code></h4>
  69. <p>The supported values of <var>feature</var> for directive <code>dg-add-options</code>
  70. are:
  71. </p>
  72. <dl compact="compact">
  73. <dt><code>arm_fp</code></dt>
  74. <dd><p><code>__ARM_FP</code> definition. Only ARM targets support this feature, and only then
  75. in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp_005fok">arm_fp_ok effective target
  76. keyword</a>.
  77. </p>
  78. </dd>
  79. <dt><code>arm_fp_dp</code></dt>
  80. <dd><p><code>__ARM_FP</code> definition with double-precision support. Only ARM
  81. targets support this feature, and only then in certain modes; see the
  82. <a href="Effective_002dTarget-Keywords.html#arm_005ffp_005fdp_005fok">arm_fp_dp_ok effective target keyword</a>.
  83. </p>
  84. </dd>
  85. <dt><code>arm_neon</code></dt>
  86. <dd><p>NEON support. Only ARM targets support this feature, and only then
  87. in certain modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005fneon_005fok">arm_neon_ok effective target
  88. keyword</a>.
  89. </p>
  90. </dd>
  91. <dt><code>arm_fp16</code></dt>
  92. <dd><p>VFP half-precision floating point support. This does not select the
  93. FP16 format; for that, use <a href="#arm_005ffp16_005fieee">arm_fp16_ieee</a> or
  94. <a href="#arm_005ffp16_005falternative">arm_fp16_alternative</a> instead. This
  95. feature is only supported by ARM targets and then only in certain
  96. modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16_005fok">arm_fp16_ok effective target
  97. keyword</a>.
  98. </p>
  99. </dd>
  100. <dt><code>arm_fp16_ieee</code></dt>
  101. <dd><a name="arm_005ffp16_005fieee"></a><p>ARM IEEE 754-2008 format VFP half-precision floating point support.
  102. This feature is only supported by ARM targets and then only in certain
  103. modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16_005fok">arm_fp16_ok effective target
  104. keyword</a>.
  105. </p>
  106. </dd>
  107. <dt><code>arm_fp16_alternative</code></dt>
  108. <dd><a name="arm_005ffp16_005falternative"></a><p>ARM Alternative format VFP half-precision floating point support.
  109. This feature is only supported by ARM targets and then only in certain
  110. modes; see the <a href="Effective_002dTarget-Keywords.html#arm_005ffp16_005fok">arm_fp16_ok effective target
  111. keyword</a>.
  112. </p>
  113. </dd>
  114. <dt><code>arm_neon_fp16</code></dt>
  115. <dd><p>NEON and half-precision floating point support. Only ARM targets
  116. support this feature, and only then in certain modes; see
  117. the <a href="Effective_002dTarget-Keywords.html#arm_005fneon_005ffp16_005fok">arm_neon_fp16_ok effective target keyword</a>.
  118. </p>
  119. </dd>
  120. <dt><code>arm_vfp3</code></dt>
  121. <dd><p>arm vfp3 floating point support; see
  122. the <a href="Effective_002dTarget-Keywords.html#arm_005fvfp3_005fok">arm_vfp3_ok effective target keyword</a>.
  123. </p>
  124. </dd>
  125. <dt><code>arm_arch_v8a_hard</code></dt>
  126. <dd><p>Add options for ARMv8-A and the hard-float variant of the AAPCS,
  127. if this is supported by the compiler; see the
  128. <a href="Effective_002dTarget-Keywords.html#arm_005farch_005fv8a_005fhard_005fok">arm_arch_v8a_hard_ok</a> effective target keyword.
  129. </p>
  130. </dd>
  131. <dt><code>arm_v8_1a_neon</code></dt>
  132. <dd><p>Add options for ARMv8.1-A with Adv.SIMD support, if this is supported
  133. by the target; see the <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f1a_005fneon_005fok">arm_v8_1a_neon_ok</a>
  134. effective target keyword.
  135. </p>
  136. </dd>
  137. <dt><code>arm_v8_2a_fp16_scalar</code></dt>
  138. <dd><p>Add options for ARMv8.2-A with scalar FP16 support, if this is
  139. supported by the target; see the
  140. <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f2a_005ffp16_005fscalar_005fok">arm_v8_2a_fp16_scalar_ok</a> effective
  141. target keyword.
  142. </p>
  143. </dd>
  144. <dt><code>arm_v8_2a_fp16_neon</code></dt>
  145. <dd><p>Add options for ARMv8.2-A with Adv.SIMD FP16 support, if this is
  146. supported by the target; see the
  147. <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f2a_005ffp16_005fneon_005fok">arm_v8_2a_fp16_neon_ok</a> effective target
  148. keyword.
  149. </p>
  150. </dd>
  151. <dt><code>arm_v8_2a_dotprod_neon</code></dt>
  152. <dd><p>Add options for ARMv8.2-A with Adv.SIMD Dot Product support, if this is
  153. supported by the target; see the
  154. <a href="Effective_002dTarget-Keywords.html#arm_005fv8_005f2a_005fdotprod_005fneon_005fok">arm_v8_2a_dotprod_neon_ok</a> effective target keyword.
  155. </p>
  156. </dd>
  157. <dt><code>arm_fp16fml_neon</code></dt>
  158. <dd><p>Add options to enable generation of the <code>VFMAL</code> and <code>VFMSL</code>
  159. instructions, if this is supported by the target; see the
  160. <a href="Effective_002dTarget-Keywords.html#arm_005ffp16fml_005fneon_005fok">arm_fp16fml_neon_ok</a> effective target keyword.
  161. </p>
  162. </dd>
  163. <dt><code>bind_pic_locally</code></dt>
  164. <dd><p>Add the target-specific flags needed to enable functions to bind
  165. locally when using pic/PIC passes in the testsuite.
  166. </p>
  167. </dd>
  168. <dt><code>float<var>n</var></code></dt>
  169. <dd><p>Add the target-specific flags needed to use the <code>_Float<var>n</var></code> type.
  170. </p>
  171. </dd>
  172. <dt><code>float<var>n</var>x</code></dt>
  173. <dd><p>Add the target-specific flags needed to use the <code>_Float<var>n</var>x</code> type.
  174. </p>
  175. </dd>
  176. <dt><code>ieee</code></dt>
  177. <dd><p>Add the target-specific flags needed to enable full IEEE
  178. compliance mode.
  179. </p>
  180. </dd>
  181. <dt><code>mips16_attribute</code></dt>
  182. <dd><p><code>mips16</code> function attributes.
  183. Only MIPS targets support this feature, and only then in certain modes.
  184. </p>
  185. </dd>
  186. <dt><code>stack_size</code></dt>
  187. <dd><a name="stack_005fsize_005fao"></a><p>Add the flags needed to define macro STACK_SIZE and set it to the stack size
  188. limit associated with the <a href="Effective_002dTarget-Keywords.html#stack_005fsize_005fet"><code>stack_size</code> effective
  189. target</a>.
  190. </p>
  191. </dd>
  192. <dt><code>sqrt_insn</code></dt>
  193. <dd><p>Add the target-specific flags needed to enable hardware square root
  194. instructions, if any.
  195. </p>
  196. </dd>
  197. <dt><code>tls</code></dt>
  198. <dd><p>Add the target-specific flags needed to use thread-local storage.
  199. </p></dd>
  200. </dl>
  201. <hr>
  202. <div class="header">
  203. <p>
  204. Next: <a href="Require-Support.html#Require-Support" accesskey="n" rel="next">Require Support</a>, Previous: <a href="Effective_002dTarget-Keywords.html#Effective_002dTarget-Keywords" accesskey="p" rel="prev">Effective-Target Keywords</a>, Up: <a href="Test-Directives.html#Test-Directives" accesskey="u" rel="up">Test Directives</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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