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83 lines
2.0 KiB
83 lines
2.0 KiB
// Copyright (c) 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/util/bit_vector.h"
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#include <cassert>
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#include <iostream>
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namespace spvtools {
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namespace utils {
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void BitVector::ReportDensity(std::ostream& out) {
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uint32_t count = 0;
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for (BitContainer e : bits_) {
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while (e != 0) {
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if ((e & 1) != 0) {
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++count;
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}
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e = e >> 1;
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}
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}
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out << "count=" << count
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<< ", total size (bytes)=" << bits_.size() * sizeof(BitContainer)
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<< ", bytes per element="
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<< (double)(bits_.size() * sizeof(BitContainer)) / (double)(count);
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}
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bool BitVector::Or(const BitVector& other) {
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auto this_it = this->bits_.begin();
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auto other_it = other.bits_.begin();
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bool modified = false;
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while (this_it != this->bits_.end() && other_it != other.bits_.end()) {
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auto temp = *this_it | *other_it;
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if (temp != *this_it) {
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modified = true;
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*this_it = temp;
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}
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++this_it;
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++other_it;
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}
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if (other_it != other.bits_.end()) {
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modified = true;
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this->bits_.insert(this->bits_.end(), other_it, other.bits_.end());
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}
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return modified;
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}
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std::ostream& operator<<(std::ostream& out, const BitVector& bv) {
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out << "{";
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for (uint32_t i = 0; i < bv.bits_.size(); ++i) {
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BitVector::BitContainer b = bv.bits_[i];
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uint32_t j = 0;
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while (b != 0) {
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if (b & 1) {
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out << ' ' << i * BitVector::kBitContainerSize + j;
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}
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++j;
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b = b >> 1;
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}
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}
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out << "}";
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return out;
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}
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} // namespace utils
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} // namespace spvtools
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