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Merge pull request #136 from JunHe77:ext_arm

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PiperOrigin-RevId: 390715690
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Victor Costan
2021-08-13 23:24:49 +00:00
parent f2db8f77ce f52721b2b4
commit 5c87bc61b6
1 changed files with 4 additions and 0 deletions
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snappy.cc
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@@ -1081,6 +1081,10 @@ inline uint32_t ExtractOffset(uint32_t val, size_t tag_type) {
reinterpret_cast<const char*>(&kExtractMasksCombined) + 2 * tag_type, reinterpret_cast<const char*>(&kExtractMasksCombined) + 2 * tag_type,
sizeof(result)); sizeof(result));
return val & result; return val & result;
#elif defined(__aarch64__)
constexpr uint64_t kExtractMasksCombined = 0x0000FFFF00FF0000ull;
return val & static_cast<uint32_t>(
(kExtractMasksCombined >> (tag_type * 16)) & 0xFFFF);
#else #else
static constexpr uint32_t kExtractMasks[4] = {0, 0xFF, 0xFFFF, 0}; static constexpr uint32_t kExtractMasks[4] = {0, 0xFF, 0xFFFF, 0};
return val & kExtractMasks[tag_type]; return val & kExtractMasks[tag_type];