Rename `wasm2asm` to `wasm2js`, emit ESM by default (#1642)

* Rename the `wasm2asm` tool to `wasm2js`

This commit performs a relatively simple rename of the `wasm2asm` tool to
`wasm2js`. The functionality of the tool doesn't change just yet but it's
intended that we'll start generating an ES module instead of just an `asm.js`
function soon.

* wasm2js: Support `*.wasm` input files

Previously `wasm2js` only supported `*.wast` files but to make it a bit easier
to use in tooling pipelines this commit adds support for reading in a `*.wasm`
file directly. Determining which parser to use depends on the input filename,
where the binary parser is used with `*.wasm` files and the wast parser is used
for all other files.

* wasm2js: Emit ESM imports/exports by default

This commit alters the default behavior of `wasm2js` to emit an ESM by default,
either importing items from the environment or exporting. Items like
initialization of memory are also handled here.

1 files changed, 0 insertions, 85 deletions

diff --git a/test/wasm2asm/grow-memory-tricky.2asm.js b/test/wasm2asm/grow-memory-tricky.2asm.js
deleted file mode 100644
index d82bfee97..000000000
--- a/test/wasm2asm/grow-memory-tricky.2asm.js
+++ /dev/null
@@ -1,85 +0,0 @@
-function asmFunc(global, env, buffer) {
- "almost asm";
- var HEAP8 = new global.Int8Array(buffer);
- var HEAP16 = new global.Int16Array(buffer);
- var HEAP32 = new global.Int32Array(buffer);
- var HEAPU8 = new global.Uint8Array(buffer);
- var HEAPU16 = new global.Uint16Array(buffer);
- var HEAPU32 = new global.Uint32Array(buffer);
- var HEAPF32 = new global.Float32Array(buffer);
- var HEAPF64 = new global.Float64Array(buffer);
- var Math_imul = global.Math.imul;
- var Math_fround = global.Math.fround;
- var Math_abs = global.Math.abs;
- var Math_clz32 = global.Math.clz32;
- var Math_min = global.Math.min;
- var Math_max = global.Math.max;
- var Math_floor = global.Math.floor;
- var Math_ceil = global.Math.ceil;
- var Math_sqrt = global.Math.sqrt;
- var abort = env.abort;
- var nan = global.NaN;
- var infinity = global.Infinity;
- var i64toi32_i32$HIGH_BITS = 0;
- function $0() {
-  var wasm2asm_i32$0 = 0, wasm2asm_i32$1 = 0;
-  wasm2asm_i32$0 = 0;
-  wasm2asm_i32$1 = __wasm_grow_memory(1 | 0);
-  HEAP32[wasm2asm_i32$0 >> 2] = wasm2asm_i32$1;
-  return HEAPU32[0 >> 2] | 0 | 0;
- }
- 
- function $1() {
-  var wasm2asm_i32$0 = 0, wasm2asm_i32$1 = 0;
-  wasm2asm_i32$0 = 0;
-  wasm2asm_i32$1 = grow() | 0;
-  HEAP32[wasm2asm_i32$0 >> 2] = wasm2asm_i32$1;
-  return HEAPU32[0 >> 2] | 0 | 0;
- }
- 
- function grow() {
-  return __wasm_grow_memory(1 | 0) | 0;
- }
- 
- function __wasm_grow_memory(pagesToAdd) {
-  pagesToAdd = pagesToAdd | 0;
-  var oldPages = __wasm_current_memory() | 0;
-  var newPages = oldPages + pagesToAdd | 0;
-  if ((oldPages < newPages) && (newPages < 65535)) {
-   var newBuffer = new ArrayBuffer(Math_imul(newPages, 65536));
-   var newHEAP8 = new global.Int8Array(newBuffer);
-   newHEAP8.set(HEAP8);
-   HEAP8 = newHEAP8;
-   HEAP16 = new global.Int16Array(newBuffer);
-   HEAP32 = new global.Int32Array(newBuffer);
-   HEAPU8 = new global.Uint8Array(newBuffer);
-   HEAPU16 = new global.Uint16Array(newBuffer);
-   HEAPU32 = new global.Uint32Array(newBuffer);
-   HEAPF32 = new global.Float32Array(newBuffer);
-   HEAPF64 = new global.Float64Array(newBuffer);
-   buffer = newBuffer;
-  }
-  return oldPages;
- }
- 
- function __wasm_current_memory() {
-  return buffer.byteLength / 65536 | 0;
- }
- 
- return {
-  memory: Object.create(Object.prototype, {
-   grow: {
-    value: __wasm_grow_memory
-   }, 
-   buffer: {
-    get: function () {
-     return buffer;
-    }
-    
-   }
-  }), 
-  f1: $0, 
-  f2: $1
- };
-}
-