_mm_hadd_pi32
Microsoft Specific
Emits the Supplemental Streaming SIMD Extensions 3 (SSSE3) instruction phaddd. This instruction adds the elements of two 64-bit parameters.
__m64 _mm_hadd_pi32(
__m64 a,
__m64 b
);
Parameters
[in] a
A 64-bit parameter that contains two 32-bit signed integers.[in] b
A 64-bit parameter that contains two 32-bit signed integers.
Return value
A 64-bit value that contains two 64-bit signed integers. Each integer is the sum between adjacent pairs of elements in the input parameters.
The result can be expressed with the following equations:
r0 := a0 + a1
r1 := b0 + b1
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_hadd_pi32 |
x86, x64 |
Header file <tmmintrin.h>
Remarks
r0, a0, and b0 are the lower 32 bits of return value r and of parameters a and b. r1, a1, and b1 are the higher order 32 bits of return value r and of parameters a and b.
Before you use this intrinsic, software must ensure that the underlying processor supports the instruction.
Example
#include <stdio.h>
#include <tmmintrin.h>
int main ()
{
__m64 a, b;
a.m64_i32[0] = 65535;
a.m64_i32[1] = -65536;
b.m64_i32[0] = 5000;
b.m64_i32[1] = 32000;
__m64 res = _mm_hadd_pi32(a, b);
printf_s("Original a:\t%6d\t%6d\nOriginal b:\t%6d\t%6d\n",
a.m64_i32[0], a.m64_i32[1], b.m64_i32[0], b.m64_i32[1]);
printf_s("Result res:\t%6d\t%6d\n",
res.m64_i32[0], res.m64_i32[1]);
_mm_empty();
return 0;
}
Original a: 65535 -65536
Original b: 5000 32000
Result res: -1 37000