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Add alternative implenetation for rand

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This commit is contained in:
Dmitrii Kovalkov 2020-05-18 09:24:22 +02:00
parent 9387981abe
commit 35e4f43ac7
3 changed files with 56 additions and 7 deletions
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46
src/Functions/FunctionsRandom.cpp
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@ -66,6 +66,52 @@ void RandImpl::execute(char * output, size_t size)
/// It is guaranteed (by PaddedPODArray) that we can overwrite up to 15 bytes after end.
}
void RandImpl2::execute(char * output, size_t size)
{
if (size == 0)
return;
LinearCongruentialGenerator generator0;
LinearCongruentialGenerator generator1;
LinearCongruentialGenerator generator2;
LinearCongruentialGenerator generator3;
LinearCongruentialGenerator generator4;
LinearCongruentialGenerator generator5;
LinearCongruentialGenerator generator6;
LinearCongruentialGenerator generator7;
seed(generator0, 0xfb4121280b2ab902ULL + reinterpret_cast<intptr_t>(output));
seed(generator1, 0x0121cf76df39c673ULL + reinterpret_cast<intptr_t>(output));
seed(generator2, 0x17ae86e3a19a602fULL + reinterpret_cast<intptr_t>(output));
seed(generator3, 0x8b6e16da7e06d622ULL + reinterpret_cast<intptr_t>(output));
seed(generator4, 0xfb4122280b2ab102ULL + reinterpret_cast<intptr_t>(output));
seed(generator5, 0x0121c276df39c173ULL + reinterpret_cast<intptr_t>(output));
seed(generator6, 0x17ae82e3a19a612fULL + reinterpret_cast<intptr_t>(output));
seed(generator7, 0x8b6e12da7e06d122ULL + reinterpret_cast<intptr_t>(output));
const char * end = output + size;
for (; (end - output + 15) <= 32; output += 32)
{
unalignedStore<UInt32>(output, generator0.next());
unalignedStore<UInt32>(output + 4, generator1.next());
unalignedStore<UInt32>(output + 8, generator2.next());
unalignedStore<UInt32>(output + 12, generator3.next());
unalignedStore<UInt32>(output + 16, generator4.next());
unalignedStore<UInt32>(output + 20, generator5.next());
unalignedStore<UInt32>(output + 24, generator6.next());
unalignedStore<UInt32>(output + 28, generator7.next());
}
while (end - output > 0) {
unalignedStore<UInt32>(output, generator0.next());
unalignedStore<UInt32>(output + 4, generator1.next());
unalignedStore<UInt32>(output + 8, generator2.next());
unalignedStore<UInt32>(output + 12, generator3.next());
output += 16;
}
}
) //DECLARE_MULTITARGET_CODE
}

12
src/Functions/FunctionsRandom.h
View File

@ -7,8 +7,7 @@
#include <Functions/TargetSpecific.h>
#include <Functions/PerformanceAdaptors.h>
// #include "TargetSpecific.h"
// #include "PerformanceAdaptors.h"
namespace DB
{
@ -45,6 +44,12 @@ struct RandImpl
static String getImplementationTag() { return ToString(BuildArch); }
};
struct RandImpl2
{
static void execute(char * output, size_t size);
static String getImplementationTag() { return ToString(BuildArch) + "_v2"; }
};
) // DECLARE_MULTITARGET_CODE
template <typename RandImpl, typename ToType, typename Name>
@ -106,6 +111,9 @@ public:
registerImplementation<FunctionRandomImpl<TargetSpecific::AVX::RandImpl, ToType, Name>>(TargetArch::AVX);
registerImplementation<FunctionRandomImpl<TargetSpecific::AVX2::RandImpl, ToType, Name>>(TargetArch::AVX2);
registerImplementation<FunctionRandomImpl<TargetSpecific::AVX512F::RandImpl, ToType, Name>>(TargetArch::AVX512F);
registerImplementation<FunctionRandomImpl<TargetSpecific::Default::RandImpl2, ToType, Name>>(TargetArch::Default);
registerImplementation<FunctionRandomImpl<TargetSpecific::AVX2::RandImpl2, ToType, Name>>(TargetArch::AVX2);
}
}

5
src/Functions/RandXorshift.h
View File

@ -12,11 +12,6 @@
namespace DB
{
namespace ErrorCodes
{
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
}
DECLARE_MULTITARGET_CODE(
struct RandXorshiftImpl