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<div><span></span>Hi Wan, Xiaofei,</div><div><span style="font-family: "" segoe="" ui'";="" font-size:="" 14px;="" color:="" rgb(0,="" 0,="" 0);="" background-color:="" rgba(0,="" font-weight:="" normal;="" font-style:="" normal;text-decoration:="" none;'=""> Thank you your replying.</span></div><div><span style="font-family: "" segoe="" ui'";="" font-size:="" 14px;="" color:="" rgb(0,="" 0,="" 0);="" background-color:="" rgba(0,="" font-weight:="" normal;="" font-style:="" normal;text-decoration:="" none;'=""><br></span></div><div><span style="font-family: "" segoe="" ui'";="" font-size:="" 14px;="" color:="" rgb(0,="" 0,="" 0);="" background-color:="" rgba(0,="" font-weight:="" normal;="" font-style:="" normal;text-decoration:="" none;'="">Cheers,</span></div><div>Robin</div>
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<div><span><div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div>yalong@multicorewareinc.com</div></div></span></div>
<blockquote style="margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em;"><div> </div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style="PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b> <a href="mailto:xiaofei.wan@intel.com" style="color: blue; text-decoration: underline;">Wan, Xiaofei</a></div><div><b>Date:</b> 2014-07-09 18:54</div><div><b>To:</b> <a href="mailto:yalong@multicorewareinc.com" style="color: blue; text-decoration: underline;">yalong@multicorewareinc.com</a>; <a href="mailto:Matthew.Arsenault@amd.com" style="color: blue; text-decoration: underline;">Matt Arsenault</a>; <a href="mailto:kevinqindev@gmail.com" style="color: blue; text-decoration: underline;">Kevin Qin</a></div><div><b>CC:</b> <a href="mailto:llvmdev@cs.uiuc.edu" style="color: blue; text-decoration: underline;">llvmdev</a></div><div><b>Subject:</b> RE: [LLVMdev] Help!!!!Help!!!! " LLVM ERROR: Cannot select: 0x9fc9680: i32 = fp32_to_fp16 0x9fc0750 [ID=16] " problem!!!!!!!!!!!!!!!!!!</div></div></div><div><div class="FoxDiv20140710155559225168">
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This is fixed by Andrea’s patch about one week ago<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><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>yalong@multicorewareinc.com<br>
<b>Sent:</b> Friday, July 11, 2014 12:45 AM<br>
<b>To:</b> Matt Arsenault; Kevin Qin<br>
<b>Cc:</b> llvmdev<br>
<b>Subject:</b> Re: [LLVMdev] Help!!!!Help!!!! " LLVM ERROR: Cannot select: 0x9fc9680: i32 = fp32_to_fp16 0x9fc0750 [ID=16] " problem!!!!!!!!!!!!!!!!!!<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">Hi Matt,<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black"> Thank you your replying. I try to use <span style="background:white"> @llvm.convert.to/from.fp16 intrinsics before, I also meet "LLVM ERROR: Cannot select:
fp32_to_fp16" problem, maybe these functions call fptrunc/fpext. Following is detail log:</span><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">LLVM ERROR: Cannot select: 0x9fc9680: i32 = fp32_to_fp16 0x9fc0750 [ID=16] <br>
0x9fc0750: f32,ch = load 0x3aafd68, 0x9fc2a20, 0x9feaab0<LD4[%sunkaddr85033]> [ORD=125117] [ID=15] <br>
0x9fc2a20: i32 = add 0x9fed880, 0x9fd9ea0 [ORD=125115] [ID=13] <br>
0x9fed880: i32,ch = CopyFromReg 0x3aafd68, 0x9fbea90 [ORD=125114] [ID=9] <br>
0x9fbea90: i32 = Register %vreg13999 [ORD=125114] [ID=1] <br>
0x9fd9ea0: i32 = Constant<80> [ORD=125115] [ID=2] <br>
0x9feaab0: i32 = undef [ORD=125117] [ID=4] <br>
In function: internal_function_69 <br>
Command exited with non-zero status 1<o:p></o:p></span></p>
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Arsenault</a><o:p></o:p></span></p>
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<p class="MsoNormal" style="background-color: rgb(239, 239, 239); margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; background-position: initial initial; background-repeat: initial initial;"><b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:black">Date:</span></b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:black"> 2014-07-09 12:51<o:p></o:p></span></p>
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<p class="MsoNormal" style="background-color: rgb(239, 239, 239); margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; background-position: initial initial; background-repeat: initial initial;"><b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:black">To:</span></b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:black"> <a href="mailto:yalong@multicorewareinc.com" style="color: blue; text-decoration: underline;">yalong@multicorewareinc.com</a>;
<a href="mailto:kevinqindev@gmail.com" style="color: blue; text-decoration: underline;">Kevin Qin</a><o:p></o:p></span></p>
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<p class="MsoNormal" style="background-color: rgb(239, 239, 239); margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; background-position: initial initial; background-repeat: initial initial;"><b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:black">Subject:</span></b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:black"> Re: [LLVMdev] Help!!!!Help!!!! " LLVM
ERROR: Cannot select: 0x9fc9680: i32 = fp32_to_fp16 0x9fc0750 [ID=16] " problem!!!!!!!!!!!!!!!!!!<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">On 07/09/2014 12:41 PM, Matt Arsenault wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">On 07/09/2014 03:30 PM,
<a href="mailto:yalong@multicorewareinc.com" style="color: blue; text-decoration: underline;">yalong@multicorewareinc.com</a> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black"> Thank you Kevin!!!<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black"> If I use fptrunc and bitcast realise NEON vcvtt ( I can sure, "fptrunc double %tmp to float" is right, but "fptrunc float %tmp to half" is wrong). My target
platform is MIPS. The command as following:<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">NEON:<span style="background:white"> </span><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black;background:white"> vcvtt.f16.f32 s2, s0</span><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black"><o:p></o:p></span></p>
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<o:p></o:p></span></p>
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%Vt_2 = load float* %VFP_s0, align 4 <br>
%Vt3_1 = fptrunc float %Vt_2 to half <br>
%Vt4_1 = bitcast half %Vt3_1 to i16 <br>
%Vt2_2 = bitcast float* %VFP_s2 to <2 x i16>* <br>
%Vrti_1 = load <2 x i16>* %Vt2_2, align 4 <br>
%Vrti_2 = insertelement <2 x i16> %Vrti_1, i16 %Vt4_1, i32 1 <br>
%Vt2_3 = bitcast float* %VFP_s2 to <2 x i16>* <br>
store <2 x i16> %Vrti_2, <2 x i16>* %Vt2_3, align 4 <br>
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<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">Error Log:<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size:10.5pt;font-family:"Segoe UI","sans-serif";color:black">LLVM ERROR: Cannot select: 0x9f554b0: ch = store 0x9d0f28c, 0x9f5d900, 0x9f54ba8, 0x9f54b20<ST2[FixedStack0](align=4), trunc to f16> [ID=52] <br>
0x9f5d900: f32,ch = load 0x9f5e290, 0x9f5dd40, 0x9f54b20<LD4[%sunkaddr69]> [ORD=1810] [ID=51] <br>
0x9f5dd40: i32 = add 0x9f55318, 0x9f5e0f8 [ORD=1808] [ID=31] <br>
0x9f55318: i32,ch = CopyFromReg 0x9d0f28c, 0x9f6a3a0 [ORD=1796] [ID=26] <br>
0x9f6a3a0: i32 = Register %vreg32 [ORD=1796] [ID=1] <br>
0x9f5e0f8: i32 = Constant<64> [ORD=1808] [ID=17] <br>
0x9f54b20: i32 = undef [ORD=1797] [ID=6] <br>
0x9f54ba8: i32 = FrameIndex<0> [ID=24] <br>
0x9f54b20: i32 = undef [ORD=1797] [ID=6] <br>
In function: testVCVTT32TO16Function <o:p></o:p></span></p>
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I think that support for the half type is only implemented for ARM. Last I tried to use it, I found that none of it works even on x86, and the current handling of the half conversion SDNodes seem to rely on ARM specific assumptions<o:p></o:p></span></p>
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Have you tried using the @llvm.convert.to/from.fp16 intrinsics instead?<o:p></o:p></span></p>
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