absolute value of intel intrinsic

The absolute value of a number in C can be calculated using the abs() function from the standard library. However, if you are looking for an alternative method using Intel intrinsics, you can use the _mm_abs_epi16(), _mm_abs_epi32(), or _mm_abs_ps() functions, depending on the data type you are working with.

Here is an example of how to use the _mm_abs_epi32() function to calculate the absolute value of a 32-bit integer:

#include <immintrin.h>

int main() {
    int32_t a = -10;
    __m128i abs_a = _mm_abs_epi32(_mm_set1_epi32(a));
    int32_t result;
    _mm_store_si128((__m128i*)&result, abs_a);

    return 0;
}

In this example, we first set the value of a to -10. Then, we use the _mm_set1_epi32() function to load the value of a into a 128-bit vector register. Next, we use the _mm_abs_epi32() function to calculate the absolute value of the vector register. Finally, we use the _mm_store_si128() function to store the result back into the result variable.

Please note that Intel intrinsics are specific to Intel processors and may not be available on other platforms. Additionally, make sure to include the appropriate header file <immintrin.h> to access the Intel intrinsics functions.