| title | __m128 | Microsoft Docs | |
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| ms.date | 11/04/2016 | |
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| ms.topic | language-reference | |
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| ms.assetid | e51a472a-0e3c-4989-9a2a-36adb05273a3 | |
| caps.latest.revision | 8 | |
| author | mikeblome | |
| ms.author | mblome | |
| manager | ghogen |
The __m128 data type, for use with the Streaming SIMD Extensions and Streaming SIMD Extensions 2 instructions intrinsics, is defined in xmmintrin.h.
// data_types__m128.cpp
#include <xmmintrin.h>
int main() {
__m128 x;
}
You should not access the __m128 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 _m128 are automatically aligned on 16-byte boundaries.
The __m128 data type is not supported on ARM processors.
END Microsoft Specific