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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
"use strict";
d8.file.execute('bigint-util.js');
let random_dividends = [];
let random_divisors = [];
// This dummy ensures that the feedback for benchmark.run() in the Measure
// function from base.js is not monomorphic, thereby preventing the benchmarks
// below from being inlined. This ensures consistent behavior and comparable
// results.
new BenchmarkSuite('Prevent-Inline-Dummy', [10000], [
new Benchmark('Prevent-Inline-Dummy', true, false, 0, () => {})
]);
new BenchmarkSuite('Divide-One', [1000], [
new Benchmark('Divide-One', true, false, 0, TestDivideOne)
]);
new BenchmarkSuite('Divide-Small', [1000], [
new Benchmark('Divide-Small', true, false, 0, TestDivideSmall,
SetUpTestDivideSmall)
]);
new BenchmarkSuite('Divide-Small-Truncated', [1000], [
new Benchmark('Divide-Small-Truncated', true, false, 0,
TestDivideSmallTruncated, SetUpTestDivideSmall)
]);
new BenchmarkSuite('Divide-Random', [10000], [
new Benchmark('Divide-Random', true, false, 0, TestDivideRandom,
SetUpTestDivideRandom)
]);
function TestDivideOne() {
let sum = 0n;
for (let i = 0n; i < TEST_ITERATIONS; ++i) {
sum += i / 1n;
}
return sum;
}
function SetUpTestDivideSmall() {
random_dividends = [];
for (let i = 0; i < TEST_ITERATIONS; ++i) {
const bigint = RandomBigIntWithBits(60);
random_dividends.push(Math.random() < 0.5 ? -bigint : bigint);
}
random_divisors = [];
for (let i = 0; i < TEST_ITERATIONS; ++i) {
const bigint = RandomBigIntWithBits(32);
random_divisors.push(Math.random() < 0.5 ? -bigint : bigint);
}
}
function TestDivideSmall() {
let sum = 0n;
for (let i = 0; i < TEST_ITERATIONS; ++i) {
sum += random_dividends[i] / random_divisors[i];
}
return sum;
}
function TestDivideSmallTruncated() {
let sum = 0n;
for (let i = 0; i < TEST_ITERATIONS; ++i) {
sum += BigInt.asIntN(64, random_dividends[i] / random_divisors[i]);
}
return sum;
}
function SetUpTestDivideRandom() {
random_dividends = [];
// RandomBigIntWithBits needs multiples of 4 bits.
const max_in_4bits = RANDOM_BIGINTS_MAX_BITS / 4;
for (let i = 0; i < TEST_ITERATIONS; ++i) {
const bits = Math.floor(Math.random() * max_in_4bits) * 4;
const bigint = RandomBigIntWithBits(bits);
random_dividends.push(Math.random() < 0.5 ? -bigint : bigint);
}
random_divisors = [];
for (let i = 0; i < TEST_ITERATIONS; ++i) {
// Avoid divide-by-zero
const bits = Math.floor(1 + Math.random() * (max_in_4bits - 1)) * 4;
const bigint = RandomBigIntWithBits(bits);
random_divisors.push(Math.random() < 0.5 ? -bigint : bigint);
}
}
function TestDivideRandom() {
let sum = 0n;
for (let i = 0; i < TEST_ITERATIONS; ++i) {
sum += random_dividends[i] / random_divisors[i];
}
return sum;
}
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