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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi zhi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You have to also pass the value type to getDecalaration() API such as<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Value* sqrtv = Intrinsic::getDeclaration(M, Intrinsic::x86_sse2_sqrt_pd,
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red">v->getType()</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Shahid<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> llvmdev-bounces@cs.uiuc.edu [mailto:llvmdev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>zhi chen<br>
<b>Sent:</b> Saturday, April 18, 2015 5:52 AM<br>
<b>To:</b> LLVM Dev<br>
<b>Subject:</b> [LLVMdev] how can I create an SSE instrinsics sqrt?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">I want to create a vector version sqrt as the following. </span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Value *Approx::CreateFSqrt(IRBuilder<> &builder, Value *v, const char* Name) {</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> Type *tys[] = {v->getType()};</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> Module* M = currF->getParent();</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> Value* sqrtv = Intrinsic::getDeclaration(M, Intrinsic::x86_sse2_sqrt_pd);</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> CallInst *CI = builder.CreateCall(sqrtv, v, Name);</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"> return CI;</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">}</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Here is Value *v is <2 x double><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">However, it outputs Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type! any idea?<o:p></o:p></span></p>
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