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Implement u64_x_u64_=_u128 optimization

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elad335 2024-10-24 09:39:35 +03:00 • committed by Elad
parent 60ae4c1121
commit 8d9911e383
1 changed files with 20 additions and 0 deletions
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20
rpcs3/util/types.hpp
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@ -250,6 +250,8 @@ using __m128 = float __attribute__((vector_size(16)));
#ifndef _MSC_VER #ifndef _MSC_VER
using u128 = __uint128_t; using u128 = __uint128_t;
using s128 = __int128_t; using s128 = __int128_t;
static constexpr bool is_u128_emulated = false;
#else #else
extern "C" extern "C"
@ -564,8 +566,26 @@ struct s128 : u128
return *this; return *this;
} }
}; };
static constexpr bool is_u128_emulated = true;
#endif #endif
// Optimization for u64*u64=u128
constexpr u128 u128_from_mul(u64 a, u64 b)
{
#ifdef _MSC_VER
if (!std::is_constant_evaluated())
{
u64 hi;
u128 result = _umul128(a, b, &hi);
result.hi = hi;
return result;
}
#endif
return u128{a} * b;
}
template <> template <>
struct get_int_impl<16> struct get_int_impl<16>
{ {