https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1605937#M3849 <P><SPAN><SPAN>I discovered that the latest x86-64 ICX 2024.0.0 generates incorrect registers. </SPAN></SPAN></P><P><SPAN><SPAN>This error has been identified in 15 opcodes.</SPAN></SPAN></P><P>&nbsp;</P><P><SPAN>Buggy code.</SPAN></P><P>```</P><DIV><DIV><SPAN>void</SPAN><SPAN> bug</SPAN><SPAN>(</SPAN><SPAN>int</SPAN><SPAN> num</SPAN><SPAN>)</SPAN> <SPAN>{</SPAN></DIV><DIV><SPAN>__asm__</SPAN><SPAN>(</SPAN> <SPAN>".intel_syntax noprefix\n"</SPAN></DIV><DIV><SPAN>"nop\n"</SPAN></DIV><DIV><SPAN>"cmpbexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpbxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmplexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpbexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmplxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnbexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnbxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnlxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnoxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnpxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnsxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnzxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmppxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpsxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpzxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"nop\n"</SPAN></DIV><DIV><SPAN>);</SPAN></DIV><DIV><SPAN>}</SPAN></DIV><DIV><SPAN>```</SPAN></DIV><DIV>&nbsp;</DIV><DIV>Compiled Code</DIV><DIV><SPAN>```</SPAN></DIV><DIV><DIV>bug:<BR />push rbp<BR />mov rbp,rsp<BR />mov DWORD PTR [rbp-0x4],edi<BR />nop<BR />cmpbexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpbxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmplexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpbexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmplxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnbexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnbxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnlxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnoxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnpxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnsxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnzxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmppxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpsxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpzxadd DWORD PTR [rax+0x1],r13d,r9d<BR />nop<BR />pop rbp<BR />ret</DIV><DIV><SPAN>```</SPAN></DIV></DIV><DIV>&nbsp;</DIV></DIV><P>I tested it through godbolt.</P><P><A href="https://godbolt.org/z/1hrhMWY39" target="_blank">https://godbolt.org/z/1hrhMWY39</A></P> Wed, 12 Jun 2024 04:43:17 GMT hyungseok 2024-06-12T04:43:17Z https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1605937#M3849 <P><SPAN><SPAN>I discovered that the latest x86-64 ICX 2024.0.0 generates incorrect registers. </SPAN></SPAN></P><P><SPAN><SPAN>This error has been identified in 15 opcodes.</SPAN></SPAN></P><P>&nbsp;</P><P><SPAN>Buggy code.</SPAN></P><P>```</P><DIV><DIV><SPAN>void</SPAN><SPAN> bug</SPAN><SPAN>(</SPAN><SPAN>int</SPAN><SPAN> num</SPAN><SPAN>)</SPAN> <SPAN>{</SPAN></DIV><DIV><SPAN>__asm__</SPAN><SPAN>(</SPAN> <SPAN>".intel_syntax noprefix\n"</SPAN></DIV><DIV><SPAN>"nop\n"</SPAN></DIV><DIV><SPAN>"cmpbexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpbxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmplexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpbexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmplxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnbexadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnbxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnlxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnoxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnpxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnsxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpnzxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmppxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpsxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"cmpzxadd [RAX+1], EBP, R9D\n"</SPAN></DIV><DIV><SPAN>"nop\n"</SPAN></DIV><DIV><SPAN>);</SPAN></DIV><DIV><SPAN>}</SPAN></DIV><DIV><SPAN>```</SPAN></DIV><DIV>&nbsp;</DIV><DIV>Compiled Code</DIV><DIV><SPAN>```</SPAN></DIV><DIV><DIV>bug:<BR />push rbp<BR />mov rbp,rsp<BR />mov DWORD PTR [rbp-0x4],edi<BR />nop<BR />cmpbexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpbxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmplexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpbexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmplxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnbexadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnbxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnlxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnoxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnpxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnsxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpnzxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmppxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpsxadd DWORD PTR [rax+0x1],r13d,r9d<BR />cmpzxadd DWORD PTR [rax+0x1],r13d,r9d<BR />nop<BR />pop rbp<BR />ret</DIV><DIV><SPAN>```</SPAN></DIV></DIV><DIV>&nbsp;</DIV></DIV><P>I tested it through godbolt.</P><P><A href="https://godbolt.org/z/1hrhMWY39" target="_blank">https://godbolt.org/z/1hrhMWY39</A></P> Wed, 12 Jun 2024 04:43:17 GMT https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1605937#M3849 hyungseok 2024-06-12T04:43:17Z https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1607496#M3872 <P>I've escalated your case to our internal engineering team.&nbsp;</P> Tue, 18 Jun 2024 01:31:26 GMT https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1607496#M3872 Alex_Y_Intel 2024-06-18T01:31:26Z https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1608928#M3895 <P>The fix is expected be in compiler version 2025.0 release.&nbsp;</P> Fri, 21 Jun 2024 21:24:18 GMT https://community.intel.com/t5/Intel-oneAPI-DPC-C-Compiler/Compiler-Errors-Emit-wrong-registers/m-p/1608928#M3895 Alex_Y_Intel 2024-06-21T21:24:18Z