[fpe] in CODEGEN (backport from gq_ttq.mad), fix the SIGFPE crash for…

… FPTYPE=f 512z builds (madgraph5#845) by adding 'volatile', again
valassi · Jun 28, 2024 · 8d700fd · 8d700fd
1 parent d5a9d09
commit 8d700fd
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/...PLUGIN/CUDACPP_SA_OUTPUT/madgraph/iolibs/template_files/gpu/process_sigmaKin_function.inc b/...PLUGIN/CUDACPP_SA_OUTPUT/madgraph/iolibs/template_files/gpu/process_sigmaKin_function.inc
@@ -219,7 +219,8 @@
           for( int icolC = 0; icolC < ncolor; icolC++ )
           {
 #if defined MGONGPU_CPPSIMD
-            const bool okcol = allrndcol[ievt] < ( targetamp[icolC][ieppV] / targetamp[ncolor - 1][ieppV] );
+            // Add volatile here to avoid SIGFPE crashes in FPTYPE=f cpp512z builds (#845)
+            volatile const bool okcol = allrndcol[ievt] < ( targetamp[icolC][ieppV] / targetamp[ncolor - 1][ieppV] );
 #else
             const bool okcol = allrndcol[ievt] < ( targetamp[icolC] / targetamp[ncolor - 1] );
 #endif