Add VivadoHLS target feature.

src/Expr.h

@@ -318,6 +318,9 @@ enum class DeviceAPI {
     GLSL,
     OpenGLCompute,
     Metal,
+    //----- HLS Modification Begins -----//
+    HLS,
+    //----- HLS Modification Ends -------//
     Hexagon
 };
 
@@ -331,6 +334,9 @@ const DeviceAPI all_device_apis[] = {DeviceAPI::None,
                                      DeviceAPI::GLSL,
                                      DeviceAPI::OpenGLCompute,
                                      DeviceAPI::Metal,
+                                     //----- HLS Modification Begins -----//
+                                     DeviceAPI::HLS,
+                                     //----- HLS Modification Ends -------//
                                      DeviceAPI::Hexagon};
 
 namespace Internal {

src/IRPrinter.cpp

@@ -88,6 +88,11 @@ ostream &operator<<(ostream &out, const DeviceAPI &api) {
     case DeviceAPI::Metal:
         out << "<Metal>";
         break;
+    //----- HLS Modification Begins -----//
+    case DeviceAPI::HLS:
+        out << "<HLS>";
+        break;
+    //----- HLS Modification Ends -------//
     case DeviceAPI::Hexagon:
         out << "<Hexagon>";
         break;

src/Module.cpp

@@ -372,29 +372,22 @@ void Module::compile(const Outputs &output_files) const {
     if (!output_files.c_source_name.empty()) {
         debug(1) << "Module.compile(): c_source_name " << output_files.c_source_name << "\n";
         std::ofstream file(output_files.c_source_name);
-        Internal::CodeGen_C cg(file,
-                               target(),
-                               target().has_feature(Target::CPlusPlusMangling) ?
-                               Internal::CodeGen_C::CPlusPlusImplementation : Internal::CodeGen_C::CImplementation);
-        cg.compile(*this);
-    }
-    if (!output_files.hls_source_name.empty()) {
-        debug(1) << "Module.compile(): hls_source_name " << output_files.hls_source_name << "\n";
-        std::ofstream file(output_files.hls_source_name);
-        Internal::CodeGen_HLS_Testbench cg(file,
-                               target(),
-                               target().has_feature(Target::CPlusPlusMangling) ?
-                               Internal::CodeGen_C::CPlusPlusImplementation : Internal::CodeGen_C::CImplementation);
-        cg.compile(*this);
-    }
-    if (!output_files.zynq_c_source_name.empty()) {
-        debug(1) << "Module.compile(): zynq_c_source_name " << output_files.zynq_c_source_name << "\n";
-        std::ofstream file(output_files.zynq_c_source_name);
-        Internal::CodeGen_Zynq_C cg(file,
-                               target(),
-                               target().has_feature(Target::CPlusPlusMangling) ?
-                               Internal::CodeGen_C::CPlusPlusImplementation : Internal::CodeGen_C::CImplementation);
-        cg.compile(*this);
+        //----- HLS Modification Begins -----//
+        CodeGen_C::OutputKind output_kind =
+            target().has_feature(Target::CPlusPlusMangling)
+                ? CodeGen_C::CPlusPlusImplementation
+                : CodeGen_C::CImplementation;
+        CodeGen_C *cg;
+        if (target().has_feature(Target::VivadoHLS)) {
+            cg = new CodeGen_HLS_Testbench(file, target(), output_kind);
+        } else if (target().has_feature(Target::Zynq)) {
+            cg = new CodeGen_Zynq_C(file, target(), output_kind);
+        } else {
+            cg = new CodeGen_C(file, target(), output_kind);
+        }
+        cg->compile(*this);
+        delete cg;
+        //----- HLS Modification Ends -------//
     }
     if (!output_files.stmt_name.empty()) {
         debug(1) << "Module.compile(): stmt_name " << output_files.stmt_name << "\n";

src/Outputs.h

@@ -106,22 +106,6 @@ struct Outputs {
         return updated;
     }
 
-    /** Make a new Outputs struct that emits everything this one does
-     * and also a HLS C source file with the given name. */
-    Outputs hls_source(const std::string &hls_source_name) {
-        Outputs updated = *this;
-        updated.hls_source_name = hls_source_name;
-        return updated;
-    }
-
-    /** Make a new Outputs struct that emits everything this one does
-     * and also a Zynq C source file with the given name. */
-    Outputs zynq_c_source(const std::string &zynq_c_source_name) {
-        Outputs updated = *this;
-        updated.zynq_c_source_name = zynq_c_source_name;
-        return updated;
-    }
-
     /** Make a new Outputs struct that emits everything this one does
      * and also a stmt file with the given name. */
     Outputs stmt(const std::string &stmt_name) const {

src/Pipeline.cpp

@@ -206,22 +206,25 @@ void Pipeline::compile_to_c(const string &filename,
     m.compile(Outputs().c_source(output_name(filename, m, ".c")));
 }
 
-
+//----- HLS Modification Begins -----//
 void Pipeline::compile_to_hls(const string &filename,
                             const vector<Argument> &args,
                             const string &fn_name,
                             const Target &target) {
-    Module m = compile_to_module(args, fn_name, target);
-    m.compile(Outputs().hls_source(output_name(filename, m, ".cpp")));
+    Target new_target = target.with_feature(Target::VivadoHLS);
+    Module m = compile_to_module(args, fn_name, new_target);
+    m.compile(Outputs().c_source(output_name(filename, m, ".cpp")));
 }
 
 void Pipeline::compile_to_zynq_c(const string &filename,
                                  const vector<Argument> &args,
                                  const string &fn_name,
                                  const Target &target) {
-    Module m = compile_to_module(args, fn_name, target);
-    m.compile(Outputs().zynq_c_source(output_name(filename, m, ".c")));
+    Target new_target = target.with_feature(Target::Zynq);
+    Module m = compile_to_module(args, fn_name, new_target);
+    m.compile(Outputs().c_source(output_name(filename, m, ".c")));
 }
+//----- HLS Modification Ends -------//
 
 void Pipeline::print_loop_nest() {
     user_assert(defined()) << "Can't print loop nest of undefined Pipeline.\n";

src/Target.cpp

@@ -245,7 +245,10 @@ const std::map<std::string, Target::Feature> feature_name_map = {
     {"profile", Target::Profile},
     {"no_runtime", Target::NoRuntime},
     {"metal", Target::Metal},
+    //----- HLS Modification Begins -----//
+    {"vivado_hls", Target::VivadoHLS},
     {"zynq", Target::Zynq},
+    //----- HLS Modification Ends -------//
     {"mingw", Target::MinGW},
     {"c_plus_plus_name_mangling", Target::CPlusPlusMangling},
     {"large_buffers", Target::LargeBuffers},

src/Target.h

@@ -66,7 +66,10 @@ struct Target {
         Profile = halide_target_feature_profile,
         NoRuntime = halide_target_feature_no_runtime,
         Metal = halide_target_feature_metal,
+        //----- HLS Modification Begins -----//
+        VivadoHLS = halide_target_feature_vivado_hls,
         Zynq = halide_target_feature_zynq,
+        //----- HLS Modification Ends -------//
         MinGW = halide_target_feature_mingw,
         CPlusPlusMangling = halide_target_feature_c_plus_plus_mangling,
         LargeBuffers = halide_target_feature_large_buffers,

src/runtime/HalideRuntime.h

@@ -944,8 +944,9 @@ typedef enum halide_target_feature_t {
     halide_target_feature_hvx_v65 = 47, ///< Enable Hexagon v65 architecture.
     halide_target_feature_hvx_v66 = 48, ///< Enable Hexagon v66 architecture.
     //----- HLS Modification Begins -----//
-    halide_target_feature_zynq = 49, // Enable Xilinx Zynq runtime.
-    halide_target_feature_end = 50 ///< A sentinel. Every target is considered to have this feature, and setting this feature does nothing.
+    halide_target_feature_vivado_hls = 49,  ///< Enable Vivado HLS code generation.
+    halide_target_feature_zynq = 50, ///< Enable Xilinx Zynq runtime.
+    halide_target_feature_end = 51 ///< A sentinel. Every target is considered to have this feature, and setting this feature does nothing.
     //----- HLS Modification Ends -------//
 } halide_target_feature_t;