mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-24 12:30:13 +00:00
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
// Copyright (c) 2016 Google Inc.
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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 "enum_set.h"
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#include "spirv/1.1/spirv.hpp"
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namespace {
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// Determines whether the given enum value can be represented
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// as a bit in a uint64_t mask. If so, then returns that mask bit.
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// Otherwise, returns 0.
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uint64_t AsMask(uint32_t word) {
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if (word > 63) return 0;
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return uint64_t(1) << word;
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}
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}
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namespace libspirv {
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template<typename EnumType>
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void EnumSet<EnumType>::Add(uint32_t word) {
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if (auto new_bits = AsMask(word)) {
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mask_ |= new_bits;
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} else {
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Overflow().insert(word);
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}
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}
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template<typename EnumType>
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bool EnumSet<EnumType>::Contains(uint32_t word) const {
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// We shouldn't call Overflow() since this is a const method.
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if (auto bits = AsMask(word)) {
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return mask_ & bits;
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} else if (auto overflow = overflow_.get()) {
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return overflow->find(word) != overflow->end();
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}
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// The word is large, but the set doesn't have large members, so
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// it doesn't have an overflow set.
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return false;
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}
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// Applies f to each capability in the set, in order from smallest enum
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// value to largest.
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void CapabilitySet::ForEach(std::function<void(SpvCapability)> f) const {
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for (uint32_t i = 0; i < 64; ++i) {
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if (mask_ & AsMask(i)) f(static_cast<SpvCapability>(i));
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}
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if (overflow_) {
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for (uint32_t c : *overflow_) f(static_cast<SpvCapability>(c));
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}
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}
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} // namespace libspirv
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