https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051170#M4039 <P>The regular conversion operator (double) also gives this message. This is with the 2014 SDK, on Intel HD 4000.</P> Tue, 16 Sep 2014 14:06:32 GMT Lubomir_A_ 2014-09-16T14:06:32Z https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051169#M4038 <P>The following code fails to compile:</P> <PRE style="font-family:Consolas;font-size:13;color:black;background:white;"><SPAN style="color:blue;">kernel</SPAN>&nbsp;<SPAN style="color:blue;">void</SPAN>&nbsp;f2(<SPAN style="color:blue;">global</SPAN>&nbsp;<SPAN style="color:blue;">double</SPAN>*&nbsp;W) { &nbsp;&nbsp;&nbsp;&nbsp;uint&nbsp;w; &nbsp;&nbsp;&nbsp;&nbsp;convert_double(w); } </PRE> <P>The error is: Error, unimplemented function called: _Z14convert_doublej()</P> <P>&nbsp;</P> Tue, 16 Sep 2014 14:03:39 GMT https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051169#M4038 Lubomir_A_ 2014-09-16T14:03:39Z https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051170#M4039 <P>The regular conversion operator (double) also gives this message. This is with the 2014 SDK, on Intel HD 4000.</P> Tue, 16 Sep 2014 14:06:32 GMT https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051170#M4039 Lubomir_A_ 2014-09-16T14:06:32Z https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051171#M4040 <P>Lubomir,</P> <P>We currently don't support cl_khr_fp64&nbsp;extension, which enables doubles support. There hardware actually supports doubles, so there are internal discussions going on about enabling doubles support in the future</P> Fri, 10 Oct 2014 16:46:25 GMT https://community.intel.com/t5/OpenCL-for-CPU/convert-double-function-unimplemented-on-GPU/m-p/1051171#M4040 Robert_I_Intel 2014-10-10T16:46:25Z