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dbms: Server: Use Intel SIMD instructions in order to optimize round/ceil/floor. [#METR-15210]

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This commit is contained in:
Alexey Arno 2015-05-18 18:59:27 +03:00
parent a73b9b50c4
commit 29efb4c632
1 changed files with 14 additions and 10 deletions
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24
dbms/include/DB/Functions/FunctionsRound.h
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@ -99,7 +99,9 @@ namespace
template<int rounding_mode>
struct Rounding32
{
static inline void apply(const std::tuple<Float32, Float32, Float32, Float32> & in, size_t scale, std::tuple<Float32, Float32, Float32, Float32> & out)
using Data = std::tuple<Float32, Float32, Float32, Float32>;
static inline void apply(const Data & in, size_t scale, Data & out)
{
Float32 input[4] __attribute__((aligned(16))) = { std::get<0>(in), std::get<1>(in), std::get<2>(in), std::get<3>(in) };
__m128 mm_value = _mm_load_ps(input);
@ -120,7 +122,9 @@ namespace
template<int rounding_mode>
struct Rounding64
{
static inline void apply(const std::tuple<Float64, Float64> & in, size_t scale, std::tuple<Float64, Float64> & out)
using Data = std::tuple<Float64, Float64>;
static inline void apply(const Data & in, size_t scale, Data & out)
{
Float64 input[2] __attribute__((aligned(16))) = { std::get<0>(in), std::get<1>(in) };
__m128d mm_value = _mm_load_pd(input);
@ -166,7 +170,7 @@ namespace
size_t i;
for (i = 0; i < (size - 3); i += 4)
{
std::tuple<Float32, Float32, Float32, Float32> res;
typename Rounding32<rounding_mode>::Data res;
Rounding32<rounding_mode>::apply(std::make_tuple(in[i], in[i + 1], in[i + 2], in[i + 3]), scale, res);
out[i] = std::get<0>(res);
out[i + 1] = std::get<1>(res);
@ -175,7 +179,7 @@ namespace
}
if (i == (size - 3))
{
std::tuple<Float32, Float32, Float32, Float32> res;
typename Rounding32<rounding_mode>::Data res;
Rounding32<rounding_mode>::apply(std::make_tuple(in[i], in[i + 1], in[i + 2], 0), scale, res);
out[i] = std::get<0>(res);
out[i + 1] = std::get<1>(res);
@ -183,14 +187,14 @@ namespace
}
else if (i == (size - 2))
{
std::tuple<Float32, Float32, Float32, Float32> res;
typename Rounding32<rounding_mode>::Data res;
Rounding32<rounding_mode>::apply(std::make_tuple(in[i], in[i + 1], 0, 0), scale, res);
out[i] = std::get<0>(res);
out[i + 1] = std::get<1>(res);
}
else if (i == (size - 1))
{
std::tuple<Float32, Float32, Float32, Float32> res;
typename Rounding32<rounding_mode>::Data res;
Rounding32<rounding_mode>::apply(std::make_tuple(in[i], 0, 0, 0), scale, res);
out[i] = std::get<0>(res);
}
@ -203,7 +207,7 @@ namespace
else
{
size_t scale = PowersTable::values[precision];
std::tuple<Float32, Float32, Float32, Float32> res;
typename Rounding32<rounding_mode>::Data res;
Rounding32<rounding_mode>::apply(std::make_tuple(val, 0, 0, 0), scale, res);
return std::get<0>(res);
}
@ -221,14 +225,14 @@ namespace
size_t i;
for (i = 0; i < (size - 1); i += 2)
{
std::tuple<double, double> res;
typename Rounding64<rounding_mode>::Data res;
Rounding64<rounding_mode>::apply(std::make_tuple(in[i], in[i + 1]), scale, res);
out[i] = std::get<0>(res);
out[i + 1] = std::get<1>(res);
}
if (i == (size - 1))
{
std::tuple<double, double> res;
typename Rounding64<rounding_mode>::Data res;
Rounding64<rounding_mode>::apply(std::make_tuple(in[i], 0), scale, res);
out[i] = std::get<0>(res);
}
@ -241,7 +245,7 @@ namespace
else
{
size_t scale = PowersTable::values[precision];
std::tuple<double, double> res;
typename Rounding64<rounding_mode>::Data res;
Rounding64<rounding_mode>::apply(std::make_tuple(val, 0), scale, res);
return std::get<0>(res);
}