Introduced support for javascript Math and Kotlin Double to WASM32.

Implemented jsinterop tool for interaction with js math.

runtime/src/launcher/js/launcher.js

@@ -95,6 +95,24 @@ function toUTF16String(pointer, size) {
     return string;
 }
 
+function twoIntsToDouble(upper, lower) {
+    var buffer = new ArrayBuffer(8);
+    var ints = new Int32Array(buffer);
+    var doubles = new Float64Array(buffer);
+    ints[1] = upper;
+    ints[0] = lower;
+    return doubles[0];
+}
+
+function doubleToTwoInts(value) {
+    var buffer = new ArrayBuffer(8);
+    var ints = new Int32Array(buffer);
+    var doubles = new Float64Array(buffer);
+    doubles[0] = value;
+    var twoInts = {upper: ints[1], lower: ints[0]};
+    return twoInts
+}
+
 function int32ToHeap(value, pointer) {
     heap[pointer]   = value & 0xff;
     heap[pointer+1] = (value & 0xff00) >>> 8;
@@ -102,6 +120,11 @@ function int32ToHeap(value, pointer) {
     heap[pointer+3] = (value & 0xff000000) >>> 24;
 }
 
+function doubleToReturnSlot(value) {
+    var twoInts = doubleToTwoInts(value);
+    instance.exports.ReturnSlot_setDouble(twoInts.upper, twoInts.lower);
+}
+
 function stackTop() {
     // Read the value module's `__stack_pointer` is initialized with.
     // It is the very first static in .data section.
@@ -239,17 +262,22 @@ function instantiateAndRunSync(arraybuffer, args) {
     return invokeModule(instance, args)
 }
 
-if (isBrowser()) {
-    var filename = document.currentScript.getAttribute("wasm");
-    fetch(filename).then( function(response) {
-        return response.arrayBuffer();
-    }).then(function(arraybuffer) { 
-        instantiateAndRun(arraybuffer, [filename]); 
-    });
-} else {
-    // Invoke from d8.
-    var arrayBuffer = readbuffer(arguments[0]);
-    var exitStatus = instantiateAndRunSync(arrayBuffer, arguments);
-    quit(exitStatus);
+konan.moduleEntry = function (args) {
+    if (isBrowser()) {
+        if (!document.currentScript.hasAttribute("wasm")) {
+            throw new Error('Could not find the wasm attribute pointing to the WebAssembly binary.') ;
+        }
+        var filename = document.currentScript.getAttribute("wasm");
+        fetch(filename).then( function(response) {
+            return response.arrayBuffer();
+        }).then(function(arraybuffer) { 
+            instantiateAndRun(arraybuffer, [filename]); 
+        });
+    } else {
+        // Invoke from d8.
+        var arrayBuffer = readbuffer(args[0]);
+        var exitStatus = instantiateAndRunSync(arrayBuffer, args);
+        quit(exitStatus);
+    }
 }
 

runtime/src/main/cpp/ReturnSlot.cpp

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * 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.
+ */
+
+#include "ReturnSlot.h"
+
+#ifdef KONAN_WASM
+namespace  {
+    THREAD_LOCAL_VARIABLE long long storage;
+}
+
+extern "C" {
+
+    KDouble ReturnSlot_getDouble() {
+        return *reinterpret_cast<KDouble*>(&::storage);
+    }
+
+    void ReturnSlot_setDouble(KInt upper, KInt lower) {
+        reinterpret_cast<KInt*>(&::storage)[0] = lower;
+        reinterpret_cast<KInt*>(&::storage)[1] = upper;
+    }
+}
+#endif

runtime/src/main/cpp/ReturnSlot.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * 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.
+ */
+
+#include "Types.h"
+
+#ifdef KONAN_WASM
+extern "C" {
+    KDouble     ReturnSlot_getDouble();
+    void        ReturnSlot_setDouble(KInt upper, KInt lower);
+}
+#endif