1 files changed, 114 insertions, 0 deletions
diff --git a/src/tools/asm2wasm.cpp b/src/tools/asm2wasm.cpp
new file mode 100644
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+++ b/src/tools/asm2wasm.cpp
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2015 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+// asm2wasm console tool
+//
+
+#include "support/colors.h"
+#include "support/command-line.h"
+#include "support/file.h"
+#include "wasm-printing.h"
+
+#include "asm2wasm.h"
+
+using namespace cashew;
+using namespace wasm;
+
+int main(int argc, const char *argv[]) {
+  bool opts = true;
+  bool imprecise = false;
+
+  Options options("asm2wasm", "Translate asm.js files to .wast files");
+  options
+      .add("--output", "-o", "Output file (stdout if not specified)",
+           Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["output"] = argument;
+             Colors::disable();
+           })
+      .add("--mapped-globals", "-m", "Mapped globals", Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["mapped globals"] = argument;
+           })
+      .add("--total-memory", "-m", "Total memory size", Options::Arguments::One,
+           [](Options *o, const std::string &argument) {
+             o->extra["total memory"] = argument;
+           })
+      .add("--no-opts", "-n", "Disable optimization passes", Options::Arguments::Zero,
+           [&opts](Options *o, const std::string &) {
+             opts = false;
+           })
+      .add("--imprecise", "-i", "Imprecise optimizations", Options::Arguments::Zero,
+           [&imprecise](Options *o, const std::string &) {
+             imprecise = true;
+           })
+      .add_positional("INFILE", Options::Arguments::One,
+                      [](Options *o, const std::string &argument) {
+                        o->extra["infile"] = argument;
+                      });
+  options.parse(argc, argv);
+
+  const auto &mg_it = options.extra.find("mapped globals");
+  const char *mappedGlobals =
+      mg_it == options.extra.end() ? nullptr : mg_it->second.c_str();
+
+  const auto &tm_it = options.extra.find("total memory");
+  size_t totalMemory =
+      tm_it == options.extra.end() ? 16 * 1024 * 1024 : atoi(tm_it->second.c_str());
+  if (totalMemory & ~Memory::kPageMask) {
+    std::cerr << "Error: total memory size " << totalMemory <<
+        " is not a multiple of the 64k wasm page size\n";
+    exit(EXIT_FAILURE);
+  }
+
+  Asm2WasmPreProcessor pre;
+  auto input(
+      read_file<std::vector<char>>(options.extra["infile"], Flags::Text, options.debug ? Flags::Debug : Flags::Release));
+  char *start = pre.process(input.data());
+
+  if (options.debug) std::cerr << "parsing..." << std::endl;
+  cashew::Parser<Ref, DotZeroValueBuilder> builder;
+  Ref asmjs = builder.parseToplevel(start);
+  if (options.debug) {
+    std::cerr << "parsed:" << std::endl;
+    asmjs->stringify(std::cerr, true);
+    std::cerr << std::endl;
+  }
+
+  if (options.debug) std::cerr << "wasming..." << std::endl;
+  Module wasm;
+  wasm.memory.initial = wasm.memory.max = totalMemory / Memory::kPageSize;
+  Asm2WasmBuilder asm2wasm(wasm, pre.memoryGrowth, options.debug, imprecise);
+  asm2wasm.processAsm(asmjs);
+
+  if (opts) {
+    if (options.debug) std::cerr << "optimizing..." << std::endl;
+    asm2wasm.optimize();
+  }
+
+  if (options.debug) std::cerr << "printing..." << std::endl;
+  Output output(options.extra["output"], Flags::Text, options.debug ? Flags::Debug : Flags::Release);
+  WasmPrinter::printModule(&wasm, output.getStream());
+
+  if (mappedGlobals) {
+    if (options.debug)
+      std::cerr << "serializing mapped globals..." << std::endl;
+    asm2wasm.serializeMappedGlobals(mappedGlobals);
+  }
+
+  if (options.debug) std::cerr << "done." << std::endl;
+}