diff options
Diffstat (limited to 'js/src/ds/Bitmap.h')
| -rw-r--r-- | js/src/ds/Bitmap.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/js/src/ds/Bitmap.h b/js/src/ds/Bitmap.h index 6770585a61..f564e2a328 100644 --- a/js/src/ds/Bitmap.h +++ b/js/src/ds/Bitmap.h @@ -162,8 +162,26 @@ class SparseBitmap { void bitwiseOrWith(const SparseBitmap& other); void bitwiseOrInto(DenseBitmap& other) const; - // Currently, this API only supports a range of words that is in a single bit - // block. + // Currently, the following APIs only supports a range of words that is in a + // single bit block. + + template <typename T> + typename std::enable_if_t<std::is_convertible_v<T, uintptr_t>, void> + bitwiseAndRangeWith(size_t wordStart, size_t numWords, T* source) { + size_t blockWord = blockStartWord(wordStart); + + // We only support using a single bit block in this API. + MOZ_ASSERT(numWords && + (blockWord == blockStartWord(wordStart + numWords - 1))); + + BitBlock* block = getBlock(blockWord / WordsInBlock); + if (block) { + for (size_t i = 0; i < numWords; i++) { + (*block)[wordStart - blockWord + i] &= source[i]; + } + } + } + template <typename T> typename std::enable_if_t<std::is_convertible_v<T, uintptr_t>, void> bitwiseOrRangeInto(size_t wordStart, size_t numWords, T* target) const { |