| // Copyright (c) 2016 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "enum_set.h" |
| |
| #include "spirv/1.1/spirv.hpp" |
| |
| namespace { |
| |
| // Determines whether the given enum value can be represented |
| // as a bit in a uint64_t mask. If so, then returns that mask bit. |
| // Otherwise, returns 0. |
| uint64_t AsMask(uint32_t word) { |
| if (word > 63) return 0; |
| return uint64_t(1) << word; |
| } |
| } |
| |
| namespace libspirv { |
| |
| template<typename EnumType> |
| void EnumSet<EnumType>::Add(uint32_t word) { |
| if (auto new_bits = AsMask(word)) { |
| mask_ |= new_bits; |
| } else { |
| Overflow().insert(word); |
| } |
| } |
| |
| template<typename EnumType> |
| bool EnumSet<EnumType>::Contains(uint32_t word) const { |
| // We shouldn't call Overflow() since this is a const method. |
| if (auto bits = AsMask(word)) { |
| return mask_ & bits; |
| } else if (auto overflow = overflow_.get()) { |
| return overflow->find(word) != overflow->end(); |
| } |
| // The word is large, but the set doesn't have large members, so |
| // it doesn't have an overflow set. |
| return false; |
| } |
| |
| // Applies f to each capability in the set, in order from smallest enum |
| // value to largest. |
| void CapabilitySet::ForEach(std::function<void(SpvCapability)> f) const { |
| for (uint32_t i = 0; i < 64; ++i) { |
| if (mask_ & AsMask(i)) f(static_cast<SpvCapability>(i)); |
| } |
| if (overflow_) { |
| for (uint32_t c : *overflow_) f(static_cast<SpvCapability>(c)); |
| } |
| } |
| |
| } // namespace libspirv |
