grow-memory.js - mozsearch

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function linearModule(min, max, ops, current_memory, grow_memory) {

  var opsText = ops.map(function (op) {

    if (op[0] == "CM") {

      res = `(if (result i32) (i32.ne (${current_memory}) (i32.const ${op[1]}))

                  (then (i32.load offset=10 (i32.const 4294967295)))

                  (else (i32.const 0)))`

    } else if (op[0] == "GM") {

      res = `(if (result i32) (i32.ne (${grow_memory} (i32.const ${op[1]})) (i32.const ${op[2]}))

                 (then (i32.load offset=10 (i32.const 4294967295)))

                 (else (i32.const 0)))`

    } else if (op[0] == "L") {

      var type = op[1];

      var ext = op[2];

      var off = op[3];

      var loc = op[4]

      var align = 0;

      res = `(${type}.load${ext} offset=${off} (i32.const ${op[4]}))`;

    } else if (op[0] == "S") {

      var type = op[1];

      var ext = op[2];

      var off = op[3];

      var loc = op[4]

      var align = 0;

      res = `(${type}.store${ext} offset=${off} (i32.const ${op[4]}) (i32.const 42))`;

    return res;

  }).join("\n")

  let text =

    `(module

       (memory ${min} ${max})

         ` + (min != 0 ? `(data (i32.const 0) "\\00\\01\\02\\03\\04\\05\\06\\07\\08\\09\\0a\\0b\\0c\\0d\\0e\\0f")

                          (data (i32.const 16) "\\f0\\f1\\f2\\f3\\f4\\f5\\f6\\f7\\f8\\f9\\fa\\fb\\fc\\fd\\fe\\ff")`

                      : "") +

       (func (result i32)

         (drop ` + opsText + `)

         (${current_memory})

       ) (export "run" (func 0)))`;

  return text;

// Just grow some memory

wasmFullPass(linearModule(3,5, [["CM", 3]], "memory.size", "memory.grow"), 3);    // New opcode names