Add support for i64.store[N] (#789)

* Add support for i64.store[N]

Previously storing i64 in the interpreter assumed an 8byte store. Stores
like i64.store8 would then use the special-case i64 storing code, when
they could just use the i32.store8 code.

* Add printf test for interpreter

* Update wasm.js

1 files changed, 20 insertions, 0 deletions

diff --git a/test/printf.c b/test/printf.c
new file mode 100644
index 000000000..ca1b1797f
--- /dev/null
+++ b/test/printf.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+int main() {
+    int a = 12345;
+    unsigned b = 123456;
+    long c = 1234567;
+    unsigned long d = 12345678;
+    long long e = 1234567891011;
+    unsigned long long f = 123456789101112;
+
+    printf(
+        "int a = %d\n"
+        "unsigned b = %u\n"
+        "long c = %ld\n"
+        "unsigned long d = %lu\n"
+        "long long e = %lld\n"
+        "unsigned long long f = %llu\n"
+        , a, b, c, d, e, f);
+    return 0;
+}