Element-wise add and subtract

Add: dst[i] = src1[i] + src2[i]

Sub: dst[i] = src1[i] - src2[i]

Parameters:

src1_data
src1_step	first source image data and step
src2_data
src2_step	second source image data and step
dst_data
dst_step	destination image data and step
width
height	dimensions of the images

// global functions

int
hal_ni_add16s(
    const short* src1_data,
    size_t src1_step,
    const short* src2_data,
    size_t src2_step,
    short* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_add16u(
    const ushort* src1_data,
    size_t src1_step,
    const ushort* src2_data,
    size_t src2_step,
    ushort* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_add32f(
    const float* src1_data,
    size_t src1_step,
    const float* src2_data,
    size_t src2_step,
    float* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_add32s(
    const int* src1_data,
    size_t src1_step,
    const int* src2_data,
    size_t src2_step,
    int* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_add64f(
    const double* src1_data,
    size_t src1_step,
    const double* src2_data,
    size_t src2_step,
    double* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_add8s(
    const schar* src1_data,
    size_t src1_step,
    const schar* src2_data,
    size_t src2_step,
    schar* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_add8u(
    const uchar* src1_data,
    size_t src1_step,
    const uchar* src2_data,
    size_t src2_step,
    uchar* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub16s(
    const short* src1_data,
    size_t src1_step,
    const short* src2_data,
    size_t src2_step,
    short* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub16u(
    const ushort* src1_data,
    size_t src1_step,
    const ushort* src2_data,
    size_t src2_step,
    ushort* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub32f(
    const float* src1_data,
    size_t src1_step,
    const float* src2_data,
    size_t src2_step,
    float* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub32s(
    const int* src1_data,
    size_t src1_step,
    const int* src2_data,
    size_t src2_step,
    int* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub64f(
    const double* src1_data,
    size_t src1_step,
    const double* src2_data,
    size_t src2_step,
    double* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub8s(
    const schar* src1_data,
    size_t src1_step,
    const schar* src2_data,
    size_t src2_step,
    schar* dst_data,
    size_t dst_step,
    int width,
    int height
    );

int
hal_ni_sub8u(
    const uchar* src1_data,
    size_t src1_step,
    const uchar* src2_data,
    size_t src2_step,
    uchar* dst_data,
    size_t dst_step,
    int width,
    int height
    );