https://community.intel.com/t5/OpenCL-for-CPU/OpenCL-GPU-compiler-fails-on-valid-code/m-p/1051068#M4033 <P>This code fails to compile when using Intel SDK for OpenCL Applications 2014 with an Intel HD 4000 GPU:</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;f1(<SPAN style="color:blue;">global</SPAN>&nbsp;<SPAN style="color:blue;">double</SPAN>*&nbsp;W) { &nbsp;&nbsp;&nbsp;&nbsp;<SPAN style="color:blue;">const</SPAN>&nbsp;<SPAN style="color:blue;">double</SPAN>&nbsp;t&nbsp;=&nbsp;1.; &nbsp;&nbsp;&nbsp;&nbsp;min(W[0],&nbsp;t); }</PRE> <P>It complains about the call to min being ambiguous. Changing it to fmin fixes the compilation. The same code compiles fine when targeting the CPU device (Core i7-3820QM), or an NVIDIA GPU.</P> Tue, 16 Sep 2014 13:56:19 GMT Lubomir_A_ 2014-09-16T13:56:19Z https://community.intel.com/t5/OpenCL-for-CPU/OpenCL-GPU-compiler-fails-on-valid-code/m-p/1051068#M4033 <P>This code fails to compile when using Intel SDK for OpenCL Applications 2014 with an Intel HD 4000 GPU:</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;f1(<SPAN style="color:blue;">global</SPAN>&nbsp;<SPAN style="color:blue;">double</SPAN>*&nbsp;W) { &nbsp;&nbsp;&nbsp;&nbsp;<SPAN style="color:blue;">const</SPAN>&nbsp;<SPAN style="color:blue;">double</SPAN>&nbsp;t&nbsp;=&nbsp;1.; &nbsp;&nbsp;&nbsp;&nbsp;min(W[0],&nbsp;t); }</PRE> <P>It complains about the call to min being ambiguous. Changing it to fmin fixes the compilation. The same code compiles fine when targeting the CPU device (Core i7-3820QM), or an NVIDIA GPU.</P> Tue, 16 Sep 2014 13:56:19 GMT https://community.intel.com/t5/OpenCL-for-CPU/OpenCL-GPU-compiler-fails-on-valid-code/m-p/1051068#M4033 Lubomir_A_ 2014-09-16T13:56:19Z https://community.intel.com/t5/OpenCL-for-CPU/OpenCL-GPU-compiler-fails-on-valid-code/m-p/1051069#M4034 <P>GPU device does not support cl_khr_fp64 currently, so switching to fmin will only help you so much. You should probably switch to floats instead of doubles on the GPU device.</P> Thu, 09 Oct 2014 01:58:03 GMT https://community.intel.com/t5/OpenCL-for-CPU/OpenCL-GPU-compiler-fails-on-valid-code/m-p/1051069#M4034 Robert_I_Intel 2014-10-09T01:58:03Z