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/*
* Copyright (C) 2016-2017 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.
*/
import * as utilities from 'utilities.js';
const _mapValues = from => {
let values = {};
for (const key in from)
values[key] = from[key].value;
return values;
};
export const description = utilities.json("wasm.json");
export const type = Object.keys(description.type);
const _typeSet = new Set(type);
export const isValidType = v => _typeSet.has(v);
export const typeValue = _mapValues(description.type);
const _valueTypeSet = new Set(description.value_type);
export const isValidValueType = v => _valueTypeSet.has(v);
const _blockTypeSet = new Set(description.block_type);
export const isValidBlockType = v => _blockTypeSet.has(v);
export const externalKindValue = _mapValues(description.external_kind);
export const sections = Object.keys(description.section);
export const sectionEncodingType = description.section[sections[0]].type;
export function* opcodes(category = undefined) {
for (let op in description.opcode)
if (category !== undefined && description.opcode[op].category === category)
yield { name: op, opcode: description.opcode[op] };
};
export const memoryAccessInfo = op => {
// <-----------valueType-----------> <-------type-------><---------width--------> <--sign-->
const classify = /((?:i32)|(?:i64)|(?:f32)|(?:f64))\.((?:load)|(?:store))((?:8)|(?:16)|(?:32))?_?((?:s|u)?)/;
const found = op.name.match(classify);
const valueType = found[1];
const type = found[2];
const width = parseInt(found[3] ? found[3] : valueType.slice(1));
const sign = (() => {
switch (found[4]) {
case "s": return "signed";
case "u": return "unsigned";
default: return "agnostic";
}
})();
return { valueType, type, width, sign };
};
export const constForValueType = valueType => {
for (let op in description.opcode)
if (op.endsWith(".const") && description.opcode[op]["return"] == valueType)
return op;
throw new Error(`Implementation problem: no const type for ${valueType}`);
};