__m128i
Visual Studio .NET 2003
Microsoft Specific
The __m128i data type, for use with the Streaming SIMD Extensions 2 (SSE2) instructions intrinsics, is defined as follows:
// data_types__m128i.cpp
typedef union __declspec(intrin_type) __declspec(align(16)) __m128i {
__int8 m128i_i8[16];
__int16 m128i_i16[8];
__int32 m128i_i32[4];
__int64 m128i_i64[2];
unsigned __int8 m128i_u8[16];
unsigned __int16 m128i_u16[8];
unsigned __int32 m128i_u32[4];
unsigned __int64 m128i_u64[2];
} __m128i;
int main()
{
}
You should not access the __m128i fields directly. You can, however, see these types in the debugger. A variable of type __m128i maps to the XMM[0-7] registers.
Variables of type _m128i are automatically aligned on 16-byte boundaries.
Note Using variables of type __m128i will cause the compiler to generate the SSE2 movdqa instruction. This instruction does not cause a fault on Pentium III processors but will result in silent failure, with possible side effects caused by whatever instructions movdqa translates into on Pentium III processors.
END Microsoft Specific
