| title | __m128d | Microsoft Docs | |
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| ms.date | 11/04/2016 | |
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| ms.tgt_pltfrm | ||
| ms.topic | language-reference | |
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| ms.assetid | 8082c7c0-a955-4b53-9d82-9bb91c623f72 | |
| caps.latest.revision | 8 | |
| author | mikeblome | |
| ms.author | mblome | |
| manager | ghogen |
The __m128d data type, for use with the Streaming SIMD Extensions 2 instructions intrinsics, is defined in emmintrin.h.
// data_types__m128d.cpp
#include <emmintrin.h>
int main() {
__m128d x;
}
You should not access the __m128d fields directly. You can, however, see these types in the debugger. A variable of type __m128 maps to the XMM[0-7] registers.
Variables of type _m128d are automatically aligned on 16-byte boundaries.
The __m128d data type is not supported on ARM processors.
END Microsoft Specific