<dl>
<dt><tt><b>zeroext</b></tt></dt>
<dd>This indicates to the code generator that the parameter or return value
- should be zero-extended to a 32-bit value by the caller (for a parameter)
- or the callee (for a return value).</dd>
+ should be zero-extended to the extent required by the target's ABI (which
+ is usually 32-bits, but is 8-bits for a i1 on x86-64) by the caller (for a
+ parameter) or the callee (for a return value).</dd>
<dt><tt><b>signext</b></tt></dt>
<dd>This indicates to the code generator that the parameter or return value
- should be sign-extended to a 32-bit value by the caller (for a parameter)
- or the callee (for a return value).</dd>
+ should be sign-extended to the extent required by the target's ABI (which
+ is usually 32-bits) by the caller (for a parameter) or the callee (for a
+ return value).</dd>
<dt><tt><b>inreg</b></tt></dt>
<dd>This indicates that this parameter or return value should be treated in a
<h5>Example:</h5>
<pre>
- %X = fpext float 3.1415 to double <i>; yields double:3.1415</i>
- %Y = fpext float 1.0 to float <i>; yields float:1.0 (no-op)</i>
+ %X = fpext float 3.125 to double <i>; yields double:3.125000e+00</i>
+ %Y = fpext double %X to fp128 <i>; yields fp128:0xL00000000000000004000900000000000</i>
</pre>
</div>
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<a href="mailto:sabre@nondot.org">Chris Lattner</a><br>
- <a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br>
+ <a href="http://llvm.org/">The LLVM Compiler Infrastructure</a><br>
Last modified: $Date$
</address>