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biginteger/diyfp: mark __int128 as extension on GCC

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Philipp A. Hartmann 2015-04-01 22:39:26 +02:00
parent 3b8158086d
commit 525e8c5770
2 changed files with 4 additions and 2 deletions
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3
include/rapidjson/internal/biginteger.h
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@ -252,7 +252,8 @@ private:
(*outHigh)++;
return low;
#elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__x86_64__)
unsigned __int128 p = static_cast<unsigned __int128>(a) * static_cast<unsigned __int128>(b);
__extension__ typedef unsigned __int128 uint128;
uint128 p = static_cast<uint128>(a) * static_cast<uint128>(b);
p += k;
*outHigh = p >> 64;
return static_cast<uint64_t>(p);

3
include/rapidjson/internal/diyfp.h
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@ -75,7 +75,8 @@ struct DiyFp {
h++;
return DiyFp(h, e + rhs.e + 64);
#elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__x86_64__)
unsigned __int128 p = static_cast<unsigned __int128>(f) * static_cast<unsigned __int128>(rhs.f);
__extension__ typedef unsigned __int128 uint128;
uint128 p = static_cast<uint128>(f) * static_cast<uint128>(rhs.f);
uint64_t h = p >> 64;
uint64_t l = static_cast<uint64_t>(p);
if (l & (uint64_t(1) << 63)) // rounding