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wasm-builder.js
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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
const _fail = (msg, extra) => {
throw new Error(msg + (extra ? ": " + extra : ""));
};
const assert = {};
const isNotA = assert.isNotA = (v, t, msg) => {
if (typeof v === t)
_fail(`Shouldn't be ${t}`, msg);
};
const isA = assert.isA = (v, t, msg) => {
if (typeof v !== t)
_fail(`Should be ${t}, got ${typeof(v)}`, msg);
};
const isNotUndef = assert.isNotUndef = (v, msg) => isNotA(v, "undefined", msg);
assert.isUndef = (v, msg) => isA(v, "undefined", msg);
assert.notObject = (v, msg) => isNotA(v, "object", msg);
const isObject = assert.isObject = (v, msg) => isA(v, "object", msg);
assert.notString = (v, msg) => isNotA(v, "string", msg);
assert.isString = (v, msg) => isA(v, "string", msg);
assert.notNumber = (v, msg) => isNotA(v, "number", msg);
assert.isNumber = (v, msg) => isA(v, "number", msg);
assert.notFunction = (v, msg) => isNotA(v, "function", msg);
assert.isFunction = (v, msg) => isA(v, "function", msg);
assert.hasObjectProperty = (o, p, msg) => {
isObject(o, msg);
isNotUndef(o[p], msg, `expected object to have property ${p}`);
};
assert.isArray = (v, msg) => {
if (!Array.isArray(v))
_fail(`Expected an array, got ${typeof(v)}`, msg);
};
assert.isNotArray = (v, msg) => {
if (Array.isArray(v))
_fail(`Expected to not be an array`, msg);
};
assert.truthy = (v, msg) => {
if (!v)
_fail(`Expected truthy`, msg);
};
assert.falsy = (v, msg) => {
if (v)
_fail(`Expected falsy`, msg);
};
assert.eq = (lhs, rhs, msg) => {
if (typeof lhs !== typeof rhs)
_fail(`Not the same: "${lhs}" and "${rhs}"`, msg);
if (Array.isArray(lhs) && Array.isArray(rhs) && (lhs.length === rhs.length)) {
for (let i = 0; i !== lhs.length; ++i)
eq(lhs[i], rhs[i], msg);
} else if (lhs !== rhs) {
if (typeof lhs === "number" && isNaN(lhs) && isNaN(rhs))
return;
_fail(`Not the same: "${lhs}" and "${rhs}"`, msg);
} else {
if (typeof lhs === "number" && (1.0 / lhs !== 1.0 / rhs)) // Distinguish -0.0 from 0.0.
_fail(`Not the same: "${lhs}" and "${rhs}"`, msg);
}
};
const canonicalizeI32 = (number) => {
if (Math.round(number) === number && number >= 2 ** 31)
number = number - 2 ** 32;
return number;
}
assert.eqI32 = (lhs, rhs, msg) => {
return eq(canonicalizeI32(lhs), canonicalizeI32(rhs), msg);
};
assert.ge = (lhs, rhs, msg) => {
isNotUndef(lhs);
isNotUndef(rhs);
if (!(lhs >= rhs))
_fail(`Expected: "${lhs}" < "${rhs}"`, msg);
};
assert.le = (lhs, rhs, msg) => {
isNotUndef(lhs);
isNotUndef(rhs);
if (!(lhs <= rhs))
_fail(`Expected: "${lhs}" > "${rhs}"`, msg);
};
const _throws = (func, type, message, ...args) => {
try {
func(...args);
} catch (e) {
if (e instanceof type) {
if (e.message === message)
return e;
// Ignore source information at the end of the error message if the
// expected message didn't specify that information. Sometimes it
// changes, or it's tricky to get just right.
const evaluatingIndex = e.message.indexOf(" (evaluating '");
if (evaluatingIndex !== -1) {
const cleanMessage = e.message.substring(0, evaluatingIndex);
if (cleanMessage === message)
return e;
}
}
_fail(`Expected to throw a ${type.name} with message "${message}", got ${e.name} with message "${e.message}"`);
}
_fail(`Expected to throw a ${type.name} with message "${message}"`);
};
const _instanceof = (obj, type, msg) => {
if (!(obj instanceof type))
_fail(`Expected a ${typeof(type)}, got ${typeof obj}`);
};
// Use underscore names to avoid clashing with builtin names.
assert.throws = _throws;
assert.instanceof = _instanceof;
const asyncTestImpl = (promise, thenFunc, catchFunc) => {
asyncTestStart(1);
promise.then(thenFunc).catch(catchFunc);
};
const printExn = (e) => {
print("Failed: ", e);
print(e.stack);
};
assert.asyncTest = (promise) => asyncTestImpl(promise, asyncTestPassed, printExn);
assert.asyncTestEq = (promise, expected) => {
const thenCheck = (value) => {
if (value === expected)
return asyncTestPassed();
print("Failed: got ", value, " but expected ", expected);
}
asyncTestImpl(promise, thenCheck, printExn);
};
const WASM_JSON = `
{
"comments": ["This file describes the WebAssembly ISA.",
"Scripts in this folder auto-generate C++ code for JavaScriptCore as well as the testing DSL which WebKit's WebAssembly tests use."
],
"preamble": [
{ "name": "magic number", "type": "uint32", "value": 1836278016, "description": "NULL character followed by 'asm'" },
{ "name": "version", "type": "uint32", "value": 1, "description": "Version number" }
],
"type" : {
"i32": { "type": "varint7", "value": -1, "b3type": "B3::Int32" },
"i64": { "type": "varint7", "value": -2, "b3type": "B3::Int64" },
"f32": { "type": "varint7", "value": -3, "b3type": "B3::Float" },
"f64": { "type": "varint7", "value": -4, "b3type": "B3::Double" },
"anyfunc": { "type": "varint7", "value": -16, "b3type": "B3::Void" },
"func": { "type": "varint7", "value": -32, "b3type": "B3::Void" },
"void": { "type": "varint7", "value": -64, "b3type": "B3::Void" }
},
"value_type": ["i32", "i64", "f32", "f64"],
"block_type": ["i32", "i64", "f32", "f64", "void"],
"elem_type": ["anyfunc"],
"external_kind": {
"Function": { "type": "uint8", "value": 0 },
"Table": { "type": "uint8", "value": 1 },
"Memory": { "type": "uint8", "value": 2 },
"Global": { "type": "uint8", "value": 3 }
},
"section" : {
"Type": { "type": "varuint7", "value": 1, "description": "Function signature declarations" },
"Import": { "type": "varuint7", "value": 2, "description": "Import declarations" },
"Function": { "type": "varuint7", "value": 3, "description": "Function declarations" },
"Table": { "type": "varuint7", "value": 4, "description": "Indirect function table and other tables" },
"Memory": { "type": "varuint7", "value": 5, "description": "Memory attributes" },
"Global": { "type": "varuint7", "value": 6, "description": "Global declarations" },
"Export": { "type": "varuint7", "value": 7, "description": "Exports" },
"Start": { "type": "varuint7", "value": 8, "description": "Start function declaration" },
"Element": { "type": "varuint7", "value": 9, "description": "Elements section" },
"Code": { "type": "varuint7", "value": 10, "description": "Function bodies (code)" },
"Data": { "type": "varuint7", "value": 11, "description": "Data segments" }
},
"opcode": {
"unreachable": { "category": "control", "value": 0, "return": [], "parameter": [], "immediate": [], "description": "trap immediately" },
"block": { "category": "control", "value": 2, "return": ["control"], "parameter": [], "immediate": [{"name": "sig", "type": "block_type"}], "description": "begin a sequence of expressions, yielding 0 or 1 values" },
"loop": { "category": "control", "value": 3, "return": ["control"], "parameter": [], "immediate": [{"name": "sig", "type": "block_type"}], "description": "begin a block which can also form control flow loops" },
"if": { "category": "control", "value": 4, "return": ["control"], "parameter": ["bool"], "immediate": [{"name": "sig", "type": "block_type"}], "description": "begin if expression" },
"else": { "category": "control", "value": 5, "return": ["control"], "parameter": [], "immediate": [], "description": "begin else expression of if" },
"select": { "category": "control", "value": 27, "return": ["prev"], "parameter": ["any", "prev", "bool"], "immediate": [], "description": "select one of two values based on condition" },
"br": { "category": "control", "value": 12, "return": [], "parameter": [], "immediate": [{"name": "relative_depth", "type": "varuint32"}], "description": "break that targets an outer nested block" },
"br_if": { "category": "control", "value": 13, "return": [], "parameter": [], "immediate": [{"name": "relative_depth", "type": "varuint32"}], "description": "conditional break that targets an outer nested block" },
"br_table": { "category": "control", "value": 14, "return": [], "parameter": [], "immediate": [{"name": "target_count", "type": "varuint32", "description": "number of entries in the target_table"},
{"name": "target_table", "type": "varuint32*", "description": "target entries that indicate an outer block or loop to which to break"},
{"name": "default_target", "type": "varuint32", "description": "an outer block or loop to which to break in the default case"}],
"description": "branch table control flow construct" },
"return": { "category": "control", "value": 15, "return": [], "parameter": [], "immediate": [], "description": "return zero or one value from this function" },
"drop": { "category": "control", "value": 26, "return": [], "parameter": ["any"], "immediate": [], "description": "ignore value" },
"nop": { "category": "control", "value": 1, "return": [], "parameter": [], "immediate": [], "description": "no operation" },
"end": { "category": "control", "value": 11, "return": [], "parameter": [], "immediate": [], "description": "end a block, loop, or if" },
"i32.const": { "category": "special", "value": 65, "return": ["i32"], "parameter": [], "immediate": [{"name": "value", "type": "varint32"}], "description": "a constant value interpreted as i32" },
"i64.const": { "category": "special", "value": 66, "return": ["i64"], "parameter": [], "immediate": [{"name": "value", "type": "varint64"}], "description": "a constant value interpreted as i64" },
"f64.const": { "category": "special", "value": 68, "return": ["f64"], "parameter": [], "immediate": [{"name": "value", "type": "double"}], "description": "a constant value interpreted as f64" },
"f32.const": { "category": "special", "value": 67, "return": ["f32"], "parameter": [], "immediate": [{"name": "value", "type": "float"}], "description": "a constant value interpreted as f32" },
"get_local": { "category": "special", "value": 32, "return": ["any"], "parameter": [], "immediate": [{"name": "local_index", "type": "varuint32"}], "description": "read a local variable or parameter" },
"set_local": { "category": "special", "value": 33, "return": [], "parameter": ["any"], "immediate": [{"name": "local_index", "type": "varuint32"}], "description": "write a local variable or parameter" },
"tee_local": { "category": "special", "value": 34, "return": ["any"], "parameter": ["any"], "immediate": [{"name": "local_index", "type": "varuint32"}], "description": "write a local variable or parameter and return the same value" },
"get_global": { "category": "special", "value": 35, "return": ["any"], "parameter": [], "immediate": [{"name": "global_index", "type": "varuint32"}], "description": "read a global variable" },
"set_global": { "category": "special", "value": 36, "return": [], "parameter": ["any"], "immediate": [{"name": "global_index", "type": "varuint32"}], "description": "write a global variable" },
"call": { "category": "call", "value": 16, "return": ["call"], "parameter": ["call"], "immediate": [{"name": "function_index", "type": "varuint32"}], "description": "call a function by its index" },
"call_indirect": { "category": "call", "value": 17, "return": ["call"], "parameter": ["call"], "immediate": [{"name": "type_index", "type": "varuint32"}, {"name": "reserved", "type": "varuint1"}], "description": "call a function indirect with an expected signature" },
"i32.load8_s": { "category": "memory", "value": 44, "return": ["i32"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i32.load8_u": { "category": "memory", "value": 45, "return": ["i32"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i32.load16_s": { "category": "memory", "value": 46, "return": ["i32"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i32.load16_u": { "category": "memory", "value": 47, "return": ["i32"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load8_s": { "category": "memory", "value": 48, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load8_u": { "category": "memory", "value": 49, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load16_s": { "category": "memory", "value": 50, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load16_u": { "category": "memory", "value": 51, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load32_s": { "category": "memory", "value": 52, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load32_u": { "category": "memory", "value": 53, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i32.load": { "category": "memory", "value": 40, "return": ["i32"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i64.load": { "category": "memory", "value": 41, "return": ["i64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"f32.load": { "category": "memory", "value": 42, "return": ["f32"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"f64.load": { "category": "memory", "value": 43, "return": ["f64"], "parameter": ["addr"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "load from memory" },
"i32.store8": { "category": "memory", "value": 58, "return": [], "parameter": ["addr", "i32"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"i32.store16": { "category": "memory", "value": 59, "return": [], "parameter": ["addr", "i32"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"i64.store8": { "category": "memory", "value": 60, "return": [], "parameter": ["addr", "i64"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"i64.store16": { "category": "memory", "value": 61, "return": [], "parameter": ["addr", "i64"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"i64.store32": { "category": "memory", "value": 62, "return": [], "parameter": ["addr", "i64"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"i32.store": { "category": "memory", "value": 54, "return": [], "parameter": ["addr", "i32"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"i64.store": { "category": "memory", "value": 55, "return": [], "parameter": ["addr", "i64"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"f32.store": { "category": "memory", "value": 56, "return": [], "parameter": ["addr", "f32"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"f64.store": { "category": "memory", "value": 57, "return": [], "parameter": ["addr", "f64"], "immediate": [{"name": "flags", "type": "varuint32"}, {"name": "offset", "type": "varuint32"}], "description": "store to memory" },
"current_memory": { "category": "operation", "value": 63, "return": ["size"], "parameter": [], "immediate": [{"name": "flags", "type": "varuint32"}], "description": "query the size of memory" },
"grow_memory": { "category": "operation", "value": 64, "return": ["size"], "parameter": ["size"], "immediate": [{"name": "flags", "type": "varuint32"}], "description": "grow the size of memory" },
"i32.add": { "category": "arithmetic", "value": 106, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Add" },
"i32.sub": { "category": "arithmetic", "value": 107, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Sub" },
"i32.mul": { "category": "arithmetic", "value": 108, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Mul" },
"i32.div_s": { "category": "arithmetic", "value": 109, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [] },
"i32.div_u": { "category": "arithmetic", "value": 110, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [] },
"i32.rem_s": { "category": "arithmetic", "value": 111, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [] },
"i32.rem_u": { "category": "arithmetic", "value": 112, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [] },
"i32.and": { "category": "arithmetic", "value": 113, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "BitAnd" },
"i32.or": { "category": "arithmetic", "value": 114, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "BitOr" },
"i32.xor": { "category": "arithmetic", "value": 115, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "BitXor" },
"i32.shl": { "category": "arithmetic", "value": 116, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Shl" },
"i32.shr_u": { "category": "arithmetic", "value": 118, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "ZShr" },
"i32.shr_s": { "category": "arithmetic", "value": 117, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "SShr" },
"i32.rotr": { "category": "arithmetic", "value": 120, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "RotR" },
"i32.rotl": { "category": "arithmetic", "value": 119, "return": ["i32"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "RotL" },
"i32.eq": { "category": "comparison", "value": 70, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Equal" },
"i32.ne": { "category": "comparison", "value": 71, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "NotEqual" },
"i32.lt_s": { "category": "comparison", "value": 72, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "LessThan" },
"i32.le_s": { "category": "comparison", "value": 76, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "LessEqual" },
"i32.lt_u": { "category": "comparison", "value": 73, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Below" },
"i32.le_u": { "category": "comparison", "value": 77, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "BelowEqual" },
"i32.gt_s": { "category": "comparison", "value": 74, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "GreaterThan" },
"i32.ge_s": { "category": "comparison", "value": 78, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "GreaterEqual" },
"i32.gt_u": { "category": "comparison", "value": 75, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "Above" },
"i32.ge_u": { "category": "comparison", "value": 79, "return": ["bool"], "parameter": ["i32", "i32"], "immediate": [], "b3op": "AboveEqual" },
"i32.clz": { "category": "arithmetic", "value": 103, "return": ["i32"], "parameter": ["i32"], "immediate": [], "b3op": "Clz" },
"i32.ctz": { "category": "arithmetic", "value": 104, "return": ["i32"], "parameter": ["i32"], "immediate": [] },
"i32.popcnt": { "category": "arithmetic", "value": 105, "return": ["i32"], "parameter": ["i32"], "immediate": [] },
"i32.eqz": { "category": "comparison", "value": 69, "return": ["bool"], "parameter": ["i32"], "immediate": [], "b3op": "Equal(i32(0), @0)" },
"i64.add": { "category": "arithmetic", "value": 124, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Add" },
"i64.sub": { "category": "arithmetic", "value": 125, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Sub" },
"i64.mul": { "category": "arithmetic", "value": 126, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Mul" },
"i64.div_s": { "category": "arithmetic", "value": 127, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [] },
"i64.div_u": { "category": "arithmetic", "value": 128, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [] },
"i64.rem_s": { "category": "arithmetic", "value": 129, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [] },
"i64.rem_u": { "category": "arithmetic", "value": 130, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [] },
"i64.and": { "category": "arithmetic", "value": 131, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "BitAnd" },
"i64.or": { "category": "arithmetic", "value": 132, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "BitOr" },
"i64.xor": { "category": "arithmetic", "value": 133, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "BitXor" },
"i64.shl": { "category": "arithmetic", "value": 134, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Shl(@0, Trunc(@1))" },
"i64.shr_u": { "category": "arithmetic", "value": 136, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "ZShr(@0, Trunc(@1))" },
"i64.shr_s": { "category": "arithmetic", "value": 135, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "SShr(@0, Trunc(@1))" },
"i64.rotr": { "category": "arithmetic", "value": 138, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "RotR(@0, Trunc(@1))" },
"i64.rotl": { "category": "arithmetic", "value": 137, "return": ["i64"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "RotL(@0, Trunc(@1))" },
"i64.eq": { "category": "comparison", "value": 81, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Equal" },
"i64.ne": { "category": "comparison", "value": 82, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "NotEqual" },
"i64.lt_s": { "category": "comparison", "value": 83, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "LessThan" },
"i64.le_s": { "category": "comparison", "value": 87, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "LessEqual" },
"i64.lt_u": { "category": "comparison", "value": 84, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Below" },
"i64.le_u": { "category": "comparison", "value": 88, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "BelowEqual" },
"i64.gt_s": { "category": "comparison", "value": 85, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "GreaterThan" },
"i64.ge_s": { "category": "comparison", "value": 89, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "GreaterEqual" },
"i64.gt_u": { "category": "comparison", "value": 86, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "Above" },
"i64.ge_u": { "category": "comparison", "value": 90, "return": ["bool"], "parameter": ["i64", "i64"], "immediate": [], "b3op": "AboveEqual" },
"i64.clz": { "category": "arithmetic", "value": 121, "return": ["i64"], "parameter": ["i64"], "immediate": [], "b3op": "Clz" },
"i64.ctz": { "category": "arithmetic", "value": 122, "return": ["i64"], "parameter": ["i64"], "immediate": [] },
"i64.popcnt": { "category": "arithmetic", "value": 123, "return": ["i64"], "parameter": ["i64"], "immediate": [] },
"i64.eqz": { "category": "comparison", "value": 80, "return": ["bool"], "parameter": ["i64"], "immediate": [], "b3op": "Equal(i64(0), @0)" },
"f32.add": { "category": "arithmetic", "value": 146, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Add" },
"f32.sub": { "category": "arithmetic", "value": 147, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Sub" },
"f32.mul": { "category": "arithmetic", "value": 148, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Mul" },
"f32.div": { "category": "arithmetic", "value": 149, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Div" },
"f32.min": { "category": "arithmetic", "value": 150, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Select(Equal(@0, @1), BitOr(@0, @1), Select(LessThan(@0, @1), @0, @1))" },
"f32.max": { "category": "arithmetic", "value": 151, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Select(Equal(@0, @1), BitAnd(@0, @1), Select(LessThan(@0, @1), @1, @0))" },
"f32.abs": { "category": "arithmetic", "value": 139, "return": ["f32"], "parameter": ["f32"], "immediate": [], "b3op": "Abs" },
"f32.neg": { "category": "arithmetic", "value": 140, "return": ["f32"], "parameter": ["f32"], "immediate": [], "b3op": "Neg" },
"f32.copysign": { "category": "arithmetic", "value": 152, "return": ["f32"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "BitwiseCast(BitOr(BitAnd(BitwiseCast(@1), i32(0x80000000)), BitAnd(BitwiseCast(@0), i32(0x7fffffff))))" },
"f32.ceil": { "category": "arithmetic", "value": 141, "return": ["f32"], "parameter": ["f32"], "immediate": [], "b3op": "Ceil" },
"f32.floor": { "category": "arithmetic", "value": 142, "return": ["f32"], "parameter": ["f32"], "immediate": [], "b3op": "Floor" },
"f32.trunc": { "category": "arithmetic", "value": 143, "return": ["f32"], "parameter": ["f32"], "immediate": [] },
"f32.nearest": { "category": "arithmetic", "value": 144, "return": ["f32"], "parameter": ["f32"], "immediate": [] },
"f32.sqrt": { "category": "arithmetic", "value": 145, "return": ["f32"], "parameter": ["f32"], "immediate": [], "b3op": "Sqrt" },
"f32.eq": { "category": "comparison", "value": 91, "return": ["bool"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "Equal" },
"f32.ne": { "category": "comparison", "value": 92, "return": ["bool"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "NotEqual" },
"f32.lt": { "category": "comparison", "value": 93, "return": ["bool"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "LessThan" },
"f32.le": { "category": "comparison", "value": 95, "return": ["bool"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "LessEqual" },
"f32.gt": { "category": "comparison", "value": 94, "return": ["bool"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "GreaterThan" },
"f32.ge": { "category": "comparison", "value": 96, "return": ["bool"], "parameter": ["f32", "f32"], "immediate": [], "b3op": "GreaterEqual" },
"f64.add": { "category": "arithmetic", "value": 160, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Add" },
"f64.sub": { "category": "arithmetic", "value": 161, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Sub" },
"f64.mul": { "category": "arithmetic", "value": 162, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Mul" },
"f64.div": { "category": "arithmetic", "value": 163, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Div" },
"f64.min": { "category": "arithmetic", "value": 164, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Select(Equal(@0, @1), BitOr(@0, @1), Select(LessThan(@0, @1), @0, @1))" },
"f64.max": { "category": "arithmetic", "value": 165, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Select(Equal(@0, @1), BitAnd(@0, @1), Select(LessThan(@0, @1), @1, @0))" },
"f64.abs": { "category": "arithmetic", "value": 153, "return": ["f64"], "parameter": ["f64"], "immediate": [], "b3op": "Abs" },
"f64.neg": { "category": "arithmetic", "value": 154, "return": ["f64"], "parameter": ["f64"], "immediate": [], "b3op": "Neg" },
"f64.copysign": { "category": "arithmetic", "value": 166, "return": ["f64"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "BitwiseCast(BitOr(BitAnd(BitwiseCast(@1), i64(0x8000000000000000)), BitAnd(BitwiseCast(@0), i64(0x7fffffffffffffff))))" },
"f64.ceil": { "category": "arithmetic", "value": 155, "return": ["f64"], "parameter": ["f64"], "immediate": [], "b3op": "Ceil" },
"f64.floor": { "category": "arithmetic", "value": 156, "return": ["f64"], "parameter": ["f64"], "immediate": [], "b3op": "Floor" },
"f64.trunc": { "category": "arithmetic", "value": 157, "return": ["f64"], "parameter": ["f64"], "immediate": [] },
"f64.nearest": { "category": "arithmetic", "value": 158, "return": ["f64"], "parameter": ["f64"], "immediate": [] },
"f64.sqrt": { "category": "arithmetic", "value": 159, "return": ["f64"], "parameter": ["f64"], "immediate": [], "b3op": "Sqrt" },
"f64.eq": { "category": "comparison", "value": 97, "return": ["bool"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "Equal" },
"f64.ne": { "category": "comparison", "value": 98, "return": ["bool"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "NotEqual" },
"f64.lt": { "category": "comparison", "value": 99, "return": ["bool"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "LessThan" },
"f64.le": { "category": "comparison", "value": 101, "return": ["bool"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "LessEqual" },
"f64.gt": { "category": "comparison", "value": 100, "return": ["bool"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "GreaterThan" },
"f64.ge": { "category": "comparison", "value": 102, "return": ["bool"], "parameter": ["f64", "f64"], "immediate": [], "b3op": "GreaterEqual" },
"i32.trunc_s/f32": { "category": "conversion", "value": 168, "return": ["i32"], "parameter": ["f32"], "immediate": [] },
"i32.trunc_s/f64": { "category": "conversion", "value": 170, "return": ["i32"], "parameter": ["f64"], "immediate": [] },
"i32.trunc_u/f32": { "category": "conversion", "value": 169, "return": ["i32"], "parameter": ["f32"], "immediate": [] },
"i32.trunc_u/f64": { "category": "conversion", "value": 171, "return": ["i32"], "parameter": ["f64"], "immediate": [] },
"i32.wrap/i64": { "category": "conversion", "value": 167, "return": ["i32"], "parameter": ["i64"], "immediate": [], "b3op": "Trunc" },
"i64.trunc_s/f32": { "category": "conversion", "value": 174, "return": ["i64"], "parameter": ["f32"], "immediate": [] },
"i64.trunc_s/f64": { "category": "conversion", "value": 176, "return": ["i64"], "parameter": ["f64"], "immediate": [] },
"i64.trunc_u/f32": { "category": "conversion", "value": 175, "return": ["i64"], "parameter": ["f32"], "immediate": [] },
"i64.trunc_u/f64": { "category": "conversion", "value": 177, "return": ["i64"], "parameter": ["f64"], "immediate": [] },
"i64.extend_s/i32": { "category": "conversion", "value": 172, "return": ["i64"], "parameter": ["i32"], "immediate": [], "b3op": "SExt32" },
"i64.extend_u/i32": { "category": "conversion", "value": 173, "return": ["i64"], "parameter": ["i32"], "immediate": [], "b3op": "ZExt32" },
"f32.convert_s/i32": { "category": "conversion", "value": 178, "return": ["f32"], "parameter": ["i32"], "immediate": [], "b3op": "IToF" },
"f32.convert_u/i32": { "category": "conversion", "value": 179, "return": ["f32"], "parameter": ["i32"], "immediate": [], "b3op": "IToF(ZExt32(@0))" },
"f32.convert_s/i64": { "category": "conversion", "value": 180, "return": ["f32"], "parameter": ["i64"], "immediate": [], "b3op": "IToF" },
"f32.convert_u/i64": { "category": "conversion", "value": 181, "return": ["f32"], "parameter": ["i64"], "immediate": [] },
"f32.demote/f64": { "category": "conversion", "value": 182, "return": ["f32"], "parameter": ["f64"], "immediate": [], "b3op": "DoubleToFloat"},
"f32.reinterpret/i32": { "category": "conversion", "value": 190, "return": ["f32"], "parameter": ["i32"], "immediate": [], "b3op": "BitwiseCast" },
"f64.convert_s/i32": { "category": "conversion", "value": 183, "return": ["f64"], "parameter": ["i32"], "immediate": [], "b3op": "IToD" },
"f64.convert_u/i32": { "category": "conversion", "value": 184, "return": ["f64"], "parameter": ["i32"], "immediate": [], "b3op": "IToD(ZExt32(@0))" },
"f64.convert_s/i64": { "category": "conversion", "value": 185, "return": ["f64"], "parameter": ["i64"], "immediate": [], "b3op": "IToD" },
"f64.convert_u/i64": { "category": "conversion", "value": 186, "return": ["f64"], "parameter": ["i64"], "immediate": [] },
"f64.promote/f32": { "category": "conversion", "value": 187, "return": ["f64"], "parameter": ["f32"], "immediate": [], "b3op": "FloatToDouble"},
"f64.reinterpret/i64": { "category": "conversion", "value": 191, "return": ["f64"], "parameter": ["i64"], "immediate": [], "b3op": "BitwiseCast" },
"i32.reinterpret/f32": { "category": "conversion", "value": 188, "return": ["i32"], "parameter": ["f32"], "immediate": [], "b3op": "BitwiseCast" },
"i64.reinterpret/f64": { "category": "conversion", "value": 189, "return": ["i64"], "parameter": ["f64"], "immediate": [], "b3op": "BitwiseCast" }
}
}
`;
const _environment =
((typeof process === "object" && typeof require === "function") ? "node"
: (typeof window === "object" ? "web"
: (typeof importScripts === "function" ? "worker"
: "shell")));
let _global = (typeof global !== 'object' || !global || global.Math !== Math || global.Array !== Array)
? ((typeof self !== 'undefined') ? self
: (typeof window !== 'undefined') ? window
: (typeof global !== 'undefined') ? global
: Function('return this')())
: global;
const _eval = x => eval.call(null, x);
const _read = filename => {
switch (_environment) {
case "node": return read(filename);
case "web": // fallthrough
case "worker": let xhr = new XMLHttpRequest(); xhr.open("GET", filename, /*async=*/false); return xhr.responseText;
case "shell": return read(filename);
}
}
const _load = filename => {
switch (_environment) {
case "node": // fallthrough
case "web": // fallthrough
case "shell": return _eval(_read(filename));
case "worker": return importScripts(filename);
}
}
const _json = filename => {
assert.eq(filename, "wasm.json");
return JSON.parse(WASM_JSON);
switch (_environment) {
case "node": // fallthrough
case "shell": return JSON.parse(_read(filename));
case "web": // fallthrough
case "worker": let xhr = new XMLHttpRequest(); xhr.overrideMimeType("application/json"); xhr.open("GET", filename, /*async=*/false); return xhr.response;
}
}
const _dump = (what, name, pad = ' ') => {
const value = v => {
try { return `"${v}"`; }
catch (e) { return `Error: "${e.message}"`; }
};
let s = `${pad}${name} ${typeof what}: ${value(what)}`;
for (let p in what) {
s += `\n${pad}${pad}${p}: ${value(what[p])} ${typeof v}`;
s += '\n' + _dump(what[p], p, pad + pad);
}
return s;
};
// Use underscore names to avoid clashing with builtin names.
const utilities = {
dump : _dump,
eval : _eval,
read : _read,
load : _load,
json : _json,
global : _global
};
const _mapValues = from => {
let values = {};
for (const key in from)
values[key] = from[key].value;
return values;
};
const WASM = {};
{
const description = WASM.description = utilities.json("wasm.json");
const type = WASM.type = Object.keys(description.type);
const _typeSet = new Set(type);
WASM.isValidType = v => _typeSet.has(v);
WASM.typeValue = _mapValues(description.type);
const _valueTypeSet = new Set(description.value_type);
WASM.isValidValueType = v => _valueTypeSet.has(v);
const _blockTypeSet = new Set(description.block_type);
WASM.isValidBlockType = v => _blockTypeSet.has(v);
WASM.externalKindValue = _mapValues(description.external_kind);
const sections = WASM.sections = Object.keys(description.section);
WASM.sectionEncodingType = description.section[sections[0]].type;
}
// LowLevelBinary.js
const _initialAllocationSize = 1024;
const _growAllocationSize = allocated => allocated * 2;
const varuint32Min = 0;
const varint7Min = -0b1000000;
const varint7Max = 0b111111;
const varuint7Max = 0b1111111;
const varuint32Max = ((((1 << 31) >>> 0) - 1) * 2) + 1;
const varint32Min = -((1 << 31) >>> 0);
const varint32Max = ((1 << 31) - 1) >>> 0;
const varBitsMax = 5;
const _getterRangeCheck = (llb, at, size) => {
if (0 > at || at + size > llb._used)
throw new RangeError(`[${at}, ${at + size}) is out of buffer range [0, ${llb._used})`);
};
const _hexdump = (buf, size) => {
let s = "";
const width = 16;
const base = 16;
for (let row = 0; row * width < size; ++row) {
const address = (row * width).toString(base);
s += "0".repeat(8 - address.length) + address;
let chars = "";
for (let col = 0; col !== width; ++col) {
const idx = row * width + col;
if (idx < size) {
const byte = buf[idx];
const bytestr = byte.toString(base);
s += " " + (bytestr.length === 1 ? "0" + bytestr : bytestr);
chars += 0x20 <= byte && byte < 0x7F ? String.fromCharCode(byte) : "·";
} else {
s += " ";
chars += " ";
}
}
s+= " |" + chars + "|\n";
}
return s;
};
class LowLevelBinary {
constructor() {
this._buf = new Uint8Array(_initialAllocationSize);
this._used = 0;
}
newPatchable(type) { return new PatchableLowLevelBinary(type, this); }
// Utilities.
get() { return this._buf; }
trim() { this._buf = this._buf.slice(0, this._used); }
hexdump() { return _hexdump(this._buf, this._used); }
_maybeGrow(bytes) {
const allocated = this._buf.length;
if (allocated - this._used < bytes) {
let buf = new Uint8Array(_growAllocationSize(allocated));
buf.set(this._buf);
this._buf = buf;
}
}
_push8(v) { this._buf[this._used] = v & 0xFF; this._used += 1; }
// Data types.
uint8(v) {
if ((v & 0xFF) >>> 0 !== v)
throw new RangeError(`Invalid uint8 ${v}`);
this._maybeGrow(1);
this._push8(v);
}
uint16(v) {
if ((v & 0xFFFF) >>> 0 !== v)
throw new RangeError(`Invalid uint16 ${v}`);
this._maybeGrow(2);
this._push8(v);
this._push8(v >>> 8);
}
uint24(v) {
if ((v & 0xFFFFFF) >>> 0 !== v)
throw new RangeError(`Invalid uint24 ${v}`);
this._maybeGrow(3);
this._push8(v);
this._push8(v >>> 8);
this._push8(v >>> 16);
}
uint32(v) {
if ((v & 0xFFFFFFFF) >>> 0 !== v)
throw new RangeError(`Invalid uint32 ${v}`);
this._maybeGrow(4);
this._push8(v);
this._push8(v >>> 8);
this._push8(v >>> 16);
this._push8(v >>> 24);
}
float(v) {
if (isNaN(v))
throw new RangeError("unimplemented, NaNs");
// Unfortunately, we cannot just view the actual buffer as a Float32Array since it needs to be 4 byte aligned
let buffer = new ArrayBuffer(4);
let floatView = new Float32Array(buffer);
let int8View = new Uint8Array(buffer);
floatView[0] = v;
for (let byte of int8View)
this._push8(byte);
}
double(v) {
if (isNaN(v))
throw new RangeError("unimplemented, NaNs");
// Unfortunately, we cannot just view the actual buffer as a Float64Array since it needs to be 4 byte aligned
let buffer = new ArrayBuffer(8);
let floatView = new Float64Array(buffer);
let int8View = new Uint8Array(buffer);
floatView[0] = v;
for (let byte of int8View)
this._push8(byte);
}
varuint32(v) {
assert.isNumber(v);
if (v < varuint32Min || varuint32Max < v)
throw new RangeError(`Invalid varuint32 ${v} range is [${varuint32Min}, ${varuint32Max}]`);
while (v >= 0x80) {
this.uint8(0x80 | (v & 0x7F));
v >>>= 7;
}
this.uint8(v);
}
varint32(v) {
assert.isNumber(v);
if (v < varint32Min || varint32Max < v)
throw new RangeError(`Invalid varint32 ${v} range is [${varint32Min}, ${varint32Max}]`);
do {
const b = v & 0x7F;
v >>= 7;
if ((v === 0 && ((b & 0x40) === 0)) || (v === -1 && ((b & 0x40) === 0x40))) {
this.uint8(b & 0x7F);
break;
}
this.uint8(0x80 | b);
} while (true);
}
varuint64(v) {
assert.isNumber(v);
if (v < varuint32Min || varuint32Max < v)
throw new RangeError(`unimplemented: varuint64 larger than 32-bit`);
this.varuint32(v); // FIXME implement 64-bit var{u}int https://bugs.webkit.org/show_bug.cgi?id=163420
}
varint64(v) {
assert.isNumber(v);
if (v < varint32Min || varint32Max < v)
throw new RangeError(`unimplemented: varint64 larger than 32-bit`);
this.varint32(v); // FIXME implement 64-bit var{u}int https://bugs.webkit.org/show_bug.cgi?id=163420
}
varuint1(v) {
if (v !== 0 && v !== 1)
throw new RangeError(`Invalid varuint1 ${v} range is [0, 1]`);
this.varuint32(v);
}
varint7(v) {
if (v < varint7Min || varint7Max < v)
throw new RangeError(`Invalid varint7 ${v} range is [${varint7Min}, ${varint7Max}]`);
this.varint32(v);
}
varuint7(v) {
if (v < varuint32Min || varuint7Max < v)
throw new RangeError(`Invalid varuint7 ${v} range is [${varuint32Min}, ${varuint7Max}]`);
this.varuint32(v);
}
block_type(v) {
if (!WASM.isValidBlockType(v))
throw new Error(`Invalid block type ${v}`);
this.varint7(WASM.typeValue[v]);
}
string(str) {
let patch = this.newPatchable("varuint32");
for (const char of str) {
// Encode UTF-8 2003 code points.
const code = char.codePointAt();
if (code <= 0x007F) {
const utf8 = code;
patch.uint8(utf8);
} else if (code <= 0x07FF) {
const utf8 = 0x80C0 | ((code & 0x7C0) >> 6) | ((code & 0x3F) << 8);
patch.uint16(utf8);
} else if (code <= 0xFFFF) {
const utf8 = 0x8080E0 | ((code & 0xF000) >> 12) | ((code & 0xFC0) << 2) | ((code & 0x3F) << 16);
patch.uint24(utf8);
} else if (code <= 0x10FFFF) {
const utf8 = (0x808080F0 | ((code & 0x1C0000) >> 18) | ((code & 0x3F000) >> 4) | ((code & 0xFC0) << 10) | ((code & 0x3F) << 24)) >>> 0;
patch.uint32(utf8);
} else
throw new Error(`Unexpectedly large UTF-8 character code point '${char}' 0x${code.toString(16)}`);
}
patch.apply();
}
// Getters.
getSize() { return this._used; }
getUint8(at) {
_getterRangeCheck(this, at, 1);
return this._buf[at];
}
getUint16(at) {
_getterRangeCheck(this, at, 2);
return this._buf[at] | (this._buf[at + 1] << 8);
}
getUint24(at) {
_getterRangeCheck(this, at, 3);
return this._buf[at] | (this._buf[at + 1] << 8) | (this._buf[at + 2] << 16);
}
getUint32(at) {
_getterRangeCheck(this, at, 4);
return (this._buf[at] | (this._buf[at + 1] << 8) | (this._buf[at + 2] << 16) | (this._buf[at + 3] << 24)) >>> 0;
}
getVaruint32(at) {
let v = 0;
let shift = 0;
let byte = 0;
do {
byte = this.getUint8(at++);
++read;
v = (v | ((byte & 0x7F) << shift) >>> 0) >>> 0;
shift += 7;
} while ((byte & 0x80) !== 0);
if (shift - 7 > 32) throw new RangeError(`Shifting too much at ${at}`);
if ((shift == 35) && ((byte & 0xF0) != 0)) throw new Error(`Unexpected non-significant varuint32 bits in last byte 0x${byte.toString(16)}`);
return { value: v, next: at };
}
getVarint32(at) {
let v = 0;
let shift = 0;
let byte = 0;
do {
byte = this.getUint8(at++);
v = (v | ((byte & 0x7F) << shift) >>> 0) >>> 0;
shift += 7;
} while ((byte & 0x80) !== 0);
if (shift - 7 > 32) throw new RangeError(`Shifting too much at ${at}`);
if ((shift == 35) && (((byte << 26) >> 30) != ((byte << 25) >> 31))) throw new Error(`Unexpected non-significant varint32 bits in last byte 0x${byte.toString(16)}`);
if ((byte & 0x40) === 0x40) {
const sext = shift < 32 ? 32 - shift : 0;
v = (v << sext) >> sext;
}
return { value: v, next: at };
}
getVaruint1(at) {
const res = this.getVaruint32(at);
if (res.value !== 0 && res.value !== 1) throw new Error(`Expected a varuint1, got value ${res.value}`);
return res;
}
getVaruint7(at) {
const res = this.getVaruint32(at);
if (res.value > varuint7Max) throw new Error(`Expected a varuint7, got value ${res.value}`);
return res;
}
getString(at) {
const size = this.getVaruint32(at);
const last = size.next + size.value;
let i = size.next;
let str = "";
while (i < last) {
// Decode UTF-8 2003 code points.
const peek = this.getUint8(i);
let code;
if ((peek & 0x80) === 0x0) {
const utf8 = this.getUint8(i);
assert.eq(utf8 & 0x80, 0x00);
i += 1;
code = utf8;
} else if ((peek & 0xE0) === 0xC0) {
const utf8 = this.getUint16(i);
assert.eq(utf8 & 0xC0E0, 0x80C0);
i += 2;
code = ((utf8 & 0x1F) << 6) | ((utf8 & 0x3F00) >> 8);
} else if ((peek & 0xF0) === 0xE0) {
const utf8 = this.getUint24(i);
assert.eq(utf8 & 0xC0C0F0, 0x8080E0);
i += 3;
code = ((utf8 & 0xF) << 12) | ((utf8 & 0x3F00) >> 2) | ((utf8 & 0x3F0000) >> 16);
} else if ((peek & 0xF8) === 0xF0) {
const utf8 = this.getUint32(i);
assert.eq((utf8 & 0xC0C0C0F8) | 0, 0x808080F0 | 0);
i += 4;
code = ((utf8 & 0x7) << 18) | ((utf8 & 0x3F00) << 4) | ((utf8 & 0x3F0000) >> 10) | ((utf8 & 0x3F000000) >> 24);
} else
throw new Error(`Unexpectedly large UTF-8 initial byte 0x${peek.toString(16)}`);
str += String.fromCodePoint(code);
}
if (i !== last)
throw new Error(`String decoding read up to ${i}, expected ${last}, UTF-8 decoding was too greedy`);
return str;
}
};
class PatchableLowLevelBinary extends LowLevelBinary {
constructor(type, lowLevelBinary) {
super();
this.type = type;
this.target = lowLevelBinary;
this._buffered_bytes = 0;
}
_push8(v) { ++this._buffered_bytes; super._push8(v); }
apply() {
this.target[this.type](this._buffered_bytes);
for (let i = 0; i < this._buffered_bytes; ++i)
this.target.uint8(this._buf[i]);
}
};
LowLevelBinary.varuint32Min = 0;
LowLevelBinary.varint7Min = -0b1000000;
LowLevelBinary.varint7Max = 0b111111;
LowLevelBinary.varuint7Max = 0b1111111;
LowLevelBinary.varuint32Max = ((((1 << 31) >>> 0) - 1) * 2) + 1;
LowLevelBinary.varint32Min = -((1 << 31) >>> 0);
LowLevelBinary.varint32Max = ((1 << 31) - 1) >>> 0;
LowLevelBinary.varBitsMax = 5;
// Builder_WebAssemblyBinary.js
const BuildWebAssembly = {};
{
const put = (bin, type, value) => bin[type](value);
const putResizableLimits = (bin, initial, maximum) => {
assert.truthy(typeof initial === "number", "We expect 'initial' to be an integer");
let hasMaximum = 0;
if (typeof maximum === "number") {
hasMaximum = 1;
} else {
assert.truthy(typeof maximum === "undefined", "We expect 'maximum' to be an integer if it's defined");
}
put(bin, "varuint1", hasMaximum);
put(bin, "varuint32", initial);
if (hasMaximum)
put(bin, "varuint32", maximum);
};
const putTable = (bin, {initial, maximum, element}) => {
assert.truthy(WASM.isValidType(element), "We expect 'element' to be a valid type. It was: " + element);
put(bin, "varint7", WASM.typeValue[element]);
putResizableLimits(bin, initial, maximum);
};
const valueType = WASM.description.type.i32.type
const putGlobalType = (bin, global) => {
put(bin, valueType, WASM.typeValue[global.type]);
put(bin, "varuint1", global.mutability);
};
const putOp = (bin, op) => {
put(bin, "uint8", op.value);
if (op.arguments.length !== 0)
throw new Error(`Unimplemented: arguments`); // FIXME https://bugs.webkit.org/show_bug.cgi?id=162706
switch (op.name) {
default:
for (let i = 0; i < op.immediates.length; ++i) {
const type = WASM.description.opcode[op.name].immediate[i].type
if (!bin[type])
throw new TypeError(`Unknown type: ${type} in op: ${op.name}`);
put(bin, type, op.immediates[i]);
}
break;
case "i32.const": {
assert.eq(op.immediates.length, 1);
let imm = op.immediates[0];
// Do a static cast to make large int32s signed.
if (imm >= 2 ** 31)
imm = imm - (2 ** 32);
put(bin, "varint32", imm);
break;
}
case "br_table":
put(bin, "varuint32", op.immediates.length - 1);
for (let imm of op.immediates)
put(bin, "varuint32", imm);
break;
}
};
const putInitExpr = (bin, expr) => {
putOp(bin, { value: WASM.description.opcode[expr.op].value, name: expr.op, immediates: [expr.initValue], arguments: [] });
putOp(bin, { value: WASM.description.opcode.end.value, name: "end", immediates: [], arguments: [] });
};
const emitters = {
Type: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const entry of section.data) {
put(bin, "varint7", WASM.typeValue["func"]);
put(bin, "varuint32", entry.params.length);
for (const param of entry.params)
put(bin, "varint7", WASM.typeValue[param]);
if (entry.ret === "void")
put(bin, "varuint1", 0);
else {
put(bin, "varuint1", 1);
put(bin, "varint7", WASM.typeValue[entry.ret]);
}
}
},
Import: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const entry of section.data) {
put(bin, "string", entry.module);
put(bin, "string", entry.field);
put(bin, "uint8", WASM.externalKindValue[entry.kind]);
switch (entry.kind) {
default: throw new Error(`Implementation problem: unexpected kind ${entry.kind}`);
case "Function": {
put(bin, "varuint32", entry.type);
break;
}
case "Table": {
putTable(bin, entry.tableDescription);
break;
}
case "Memory": {
let {initial, maximum} = entry.memoryDescription;
putResizableLimits(bin, initial, maximum);
break;
};
case "Global":
putGlobalType(bin, entry.globalDescription);
break;
}
}
},
Function: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const signature of section.data)
put(bin, "varuint32", signature);
},
Table: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const {tableDescription} of section.data) {
putTable(bin, tableDescription);
}
},
Memory: (section, bin) => {
// Flags, currently can only be [0,1]
put(bin, "varuint1", section.data.length);
for (const memory of section.data) {
put(bin, "varuint32", memory.max ? 1 : 0);
put(bin, "varuint32", memory.initial);
if (memory.max)
put(bin, "varuint32", memory.max);
}
},
Global: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const global of section.data) {
putGlobalType(bin, global);
putInitExpr(bin, global)
}
},
Export: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const entry of section.data) {
put(bin, "string", entry.field);
put(bin, "uint8", WASM.externalKindValue[entry.kind]);
switch (entry.kind) {
case "Global":
case "Function":
case "Memory":
case "Table":
put(bin, "varuint32", entry.index);
break;
default: throw new Error(`Implementation problem: unexpected kind ${entry.kind}`);
}
}
},
Start: (section, bin) => {
put(bin, "varuint32", section.data[0]);
},
Element: (section, bin) => {
const data = section.data;
put(bin, "varuint32", data.length);
for (const {tableIndex, offset, functionIndices} of data) {
put(bin, "varuint32", tableIndex);
let initExpr;
if (typeof offset === "number")
initExpr = {op: "i32.const", initValue: offset};
else
initExpr = offset;
putInitExpr(bin, initExpr);
put(bin, "varuint32", functionIndices.length);
for (const functionIndex of functionIndices)
put(bin, "varuint32", functionIndex);
}
},
Code: (section, bin) => {
put(bin, "varuint32", section.data.length);
for (const func of section.data) {
let funcBin = bin.newPatchable("varuint32");
const localCount = func.locals.length - func.parameterCount;
put(funcBin, "varuint32", localCount);
for (let i = func.parameterCount; i < func.locals.length; ++i) {
put(funcBin, "varuint32", 1);