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MCOL-4313 Very fragile but high speed approach with inline ASM

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GCC compiler uses aligned versions of SIMD instructions expecting
aligned memory blocks that is hard to implement now
This commit is contained in:
Roman Nozdrin
2020-10-13 12:43:16 +00:00
parent 7d3d828790
commit 844472d812
4 changed files with 65 additions and 6 deletions
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19
primitives/primproc/columncommand.cpp
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@ -231,7 +231,11 @@ void ColumnCommand::loadData()
{
ByteStream::hexbyte h;
utils::getEmptyRowValue(colType.colDataType, colType.colWidth, (uint8_t*)&h);
hPtr[idx] = h;
__asm__ volatile("movups %1,%0"
:"=m" ( hPtr[idx] ) // output
:"v"( h ) // input
: "memory" // clobbered
);
}
}
@ -328,7 +332,18 @@ void ColumnCommand::process_OT_BOTH()
bpp->relRids[i] = *((uint16_t*) &bpp->outputMsg[pos]);
pos += 2;
wide128Values[i] = *((int128_t*) &bpp->outputMsg[pos]);
int128_t* int128Ptr = reinterpret_cast<int128_t*>(&bpp->outputMsg[pos]);
__asm__ volatile("movdqu %0,%%xmm0;"
:
:"m"( *int128Ptr ) // input
:"xmm0" // clobbered
);
__asm__ volatile("movups %%xmm0,%0;"
: "=m" (wide128Values[i])// output
: // input
: "memory", "xmm0" // clobbered
);
pos += 16;
}