Merge pull request #203 from WebAssembly/wasm.js-improvements

Wasm.js improvements

1 files changed, 70 insertions, 0 deletions

diff --git a/test/wasm_backend/unaligned.cpp b/test/wasm_backend/unaligned.cpp
new file mode 100644
index 000000000..75f8b419b
--- /dev/null
+++ b/test/wasm_backend/unaligned.cpp
@@ -0,0 +1,70 @@
+#include <stdint.h>
+#include <emscripten.h>
+
+void print(int v) {
+  int *x = (int*)8;
+  *x = v;
+  EM_ASM({
+    Module.print("print: " + HEAP32[8>>2]);
+  });
+}
+
+char buffer[8];
+
+int main() {
+  {
+    volatile int16_t* x;
+    x = (int16_t*)&buffer[0];
+    *x = 0x1234;
+    print(*x);
+    x = (int16_t*)&buffer[1];
+    *x = 0x2345;
+    print(*x);
+  }
+  {
+    volatile int32_t* x;
+    x = (int32_t*)&buffer[0];
+    *x = 0x12345678;
+    print(*x);
+    x = (int32_t*)&buffer[1];
+    *x = 0x23456789;
+    print(*x);
+    x = (int32_t*)&buffer[2];
+    *x = 0x3456789a;
+    print(*x);
+    x = (int32_t*)&buffer[3];
+    *x = 0x456789ab;
+    print(*x);
+  }
+  {
+    volatile float* x;
+    x = (float*)&buffer[0];
+    *x = -0x12345678;
+    print(*x);
+    x = (float*)&buffer[1];
+    *x = -0x12345678;
+    print(*x);
+    x = (float*)&buffer[2];
+    *x = -0x12345678;
+    print(*x);
+    x = (float*)&buffer[3];
+    *x = -0x12345678;
+    print(*x);
+  }
+  {
+    volatile double* x;
+    x = (double*)&buffer[0];
+    *x = -1;
+    print(*x);
+    x = (double*)&buffer[1];
+    *x = -2;
+    print(*x);
+    x = (double*)&buffer[2];
+    *x = -3;
+    print(*x);
+    x = (double*)&buffer[3];
+    *x = -4;
+    print(*x);
+  }
+}
+