_mm_stream_sd
Microsoft Specific
Writes 64-bit data to a memory location without polluting the caches.
Syntax
void _mm_stream_sd(
double * Dest,
__m128d Source
);
Parameters
Dest
[out] A pointer to the location where the source data will be written.
Source
[in] A 128-bit value containing the double value to be written in its bottom 64 bits.
Return value
None.
Requirements
| Intrinsic | Architecture |
|---|---|
_mm_stream_sd |
SSE4a |
Header file <intrin.h>
Remarks
The intrinsic generates the movntsd instruction. To determine hardware support for this instruction, call the __cpuid intrinsic with InfoType=0x80000001 and check bit 6 of CPUInfo[2] (ECX). This bit is 1 if the hardware supports this instruction, and 0 otherwise.
If you run code that uses the _mm_stream_sd intrinsic on hardware that doesn't support the movntsd instruction, the results are unpredictable.
Example
// Compile this sample with: /EHsc
#include <iostream>
#include <intrin.h>
using namespace std;
int main()
{
__m128d vals;
double d[2];
d[0] = -1.;
d[1] = -2.;
vals.m128d_f64[0] = 0.;
vals.m128d_f64[1] = 1.;
_mm_stream_sd(&d[1], vals);
cout << "d[0] = " << d[0] << ", d[1] = " << d[1] << endl;
}
d[0] = -1, d[1] = 1
END Microsoft Specific
Portions Copyright 2007 by Advanced Micro Devices, Inc. All rights reserved. Reproduced with permission from Advanced Micro Devices, Inc.