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__m128

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Microsoft Specific

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;
}

Remarks

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 Itanium Processor Family (IPF) processors.

See Also

Reference

C++ Keywords

Fundamental Types

Data Type Ranges