diff --git a/decl.cpp b/decl.cpp
index 47443375..f21e3c41 100644
--- a/decl.cpp
+++ b/decl.cpp
@@ -531,7 +531,7 @@ Declarator::InitFromType(const Type *baseType, DeclSpecs *ds) {
         returnType = returnType->ResolveUnboundVariability(Variability::Varying);
 
         bool isTask =     ds && ((ds->typeQualifiers & TYPEQUAL_TASK) != 0);
-        if (isTask && g->target->getISA() == Target::NVPTX64)
+        if (isTask && g->target->isPTX()) //getISA() == Target::NVPTX64)
         {
           ds->storageClass = SC_EXTERN_C;
           ds->typeQualifiers |= TYPEQUAL_UNMASKED;
@@ -546,13 +546,12 @@ Declarator::InitFromType(const Type *baseType, DeclSpecs *ds) {
                   "qualifiers");
             return;
         }
-#if 0 /* NVPTX64::task_and_externC */
-        if (isExternC && isTask) {
-            Error(pos, "Function can't have both \"extern \"C\"\" and \"task\" "
-                  "qualifiers");
-            return;
-        }
-#endif
+        if (!g->target->isPTX())
+          if (isExternC && isTask) {
+              Error(pos, "Function can't have both \"extern \"C\"\" and \"task\" "
+                    "qualifiers");
+              return;
+          }
         if (isExternC && isExported) {
             Error(pos, "Function can't have both \"extern \"C\"\" and \"export\" "
                   "qualifiers");
diff --git a/func.cpp b/func.cpp
index 62372a21..f930ce10 100644
--- a/func.cpp
+++ b/func.cpp
@@ -527,6 +527,8 @@ Function::GenerateIR() {
       const FunctionType *type= CastType<FunctionType>(sym->type);
       if (g->target->getISA() == Target::NVPTX64 && type->isExported)
         return;
+      if (g->target->getISA() != Target::NVPTX64 && g->target->isPTX() && !type->isExported)
+        return;
     }
     {
         FunctionEmitContext ec(this, sym, function, firstStmtPos);
diff --git a/module.cpp b/module.cpp
index 071013b8..2f5e6167 100644
--- a/module.cpp
+++ b/module.cpp
@@ -733,7 +733,7 @@ Module::AddFunctionDeclaration(const std::string &name,
     if (storageClass == SC_EXTERN_C) {
         // Make sure the user hasn't supplied both an 'extern "C"' and a
         // 'task' qualifier with the function
-        if (functionType->isTask && g->target->getISA() != Target::NVPTX64) {
+        if (functionType->isTask && !g->target->isPTX()) { //tISA() != Target::NVPTX64) {
             Error(pos, "\"task\" qualifier is illegal with C-linkage extern "
                   "function \"%s\".  Ignoring this function.", name.c_str());
             return;
@@ -2319,6 +2319,11 @@ Module::CompileAndOutput(const char *srcFile,
     // We're only compiling to a single target
     const char * target_list[] = {"nvptx64", "avx"};
     int errorCount = 0;
+
+    const char *suffix_orig = strrchr(outFileName, '.');
+    ++suffix_orig;
+    assert(suffix_orig!=NULL);
+
     for (int itarget = 0; itarget < 2; itarget++)
     {
       fprintf(stderr,  "compiling nvptx64 : target= %s\n",target_list[itarget]);
@@ -2345,8 +2350,19 @@ Module::CompileAndOutput(const char *srcFile,
         }
 
         assert(outFileName != NULL);
-        std::string targetOutFileName =
+
+        std::string targetOutFileName = 
           lGetTargetFileName(outFileName, target_list[itarget]);
+        if (outputType == Asm)
+        {
+          const char * targetOutFileName_c = targetOutFileName.c_str();
+          const int suffix = strrchr(targetOutFileName_c, '.') - targetOutFileName_c + 1;
+          if (itarget == 1 && !strcasecmp(suffix_orig, "ptx"))
+          {
+            targetOutFileName[suffix  ] = 's';
+            targetOutFileName[suffix+1] =  0;
+          }
+        }
         if (!m->writeOutput(outputType, targetOutFileName.c_str(), includeFileName))
             return 1;
 
diff --git a/type.cpp b/type.cpp
index 23594e2f..04c02989 100644
--- a/type.cpp
+++ b/type.cpp
@@ -2925,7 +2925,7 @@ FunctionType::GetReturnTypeString() const {
 llvm::FunctionType *
 FunctionType::LLVMFunctionType(llvm::LLVMContext *ctx, bool removeMask) const {
 
-    if (isTask == true && g->target->getISA() != Target::NVPTX64)
+    if (isTask == true && !g->target->isPTX()) //getISA() != Target::NVPTX64)
         Assert(removeMask == false);
 
     // Get the LLVM Type *s for the function arguments