_mm_testc_si128
Microsoft Specific
Emits the Streaming SIMD Extensions 4 (SSE4) instruction ptest. This instruction performs a bitwise comparison between two 128-bit parameters.
int _mm_testc_si128(
__m128i a,
__m128i b
);
Parameters
[in] a
A 128-bit value.[in] b
A 128-bit value.
Return value
1 if a and b are bitwise identical; 0 otherwise.
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_testc_si128 |
x86, x64 |
Header file <smmintrin.h>
Remarks
Before you use this intrinsic, software must ensure that the processor supports the instruction.
Example
#include <stdio.h>
#include <smmintrin.h>
int main ()
{
__m128i a, b;
a.m128i_u64[0] = 0xAAAA55551111FFFF;
b.m128i_u64[0] = 0xAAAA55551111FFFF;
a.m128i_u64[1] = 0xFEDCBA9876543210;
b.m128i_u64[1] = 0xFEDCBA9876543210;
int res1 = _mm_testc_si128(a, b);
a.m128i_u64[0] = 0xAAAA55551011FFFF;
int res2 = _mm_testc_si128(a, b);
printf_s("First result should be 1: %d\nSecond result should be 0: %d\n",
res1, res2);
return 0;
}
First result should be 1: 1
Second result should be 0: 0