diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-algs.hh')
| -rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-algs.hh | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-algs.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-algs.hh index 13587eac017..da383e050a9 100644 --- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-algs.hh +++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-algs.hh @@ -626,8 +626,10 @@ hb_popcount (T v) if (sizeof (T) == 8) { - unsigned int shift = 32; - return hb_popcount<uint32_t> ((uint32_t) v) + hb_popcount ((uint32_t) (v >> shift)); + uint64_t y = (uint64_t) v; + y -= ((y >> 1) & 0x5555555555555555ull); + y = (y & 0x3333333333333333ull) + (y >> 2 & 0x3333333333333333ull); + return ((y + (y >> 4)) & 0xf0f0f0f0f0f0f0full) * 0x101010101010101ull >> 56; } if (sizeof (T) == 16) |