vec_cx_mpy_04.c

dsp6713开发板的许多例程.对入门特别有用

void vec_cx_mpy(const short *restrict a, const short *restrict b,
              short *restrict c)
{
    int j; 

    for (i = j = 0; i < len; i++, j += 2)
    {
        /* Real components are at odd offsets, and imaginary components
           are at even offsets within each array. */
        c[j+1] = (a[j+1] * b[j+1] - a[j+0] * b[j+0]) >> 16;
        c[j+0] = (a[j+1] * b[j+0] + a[j+0] * b[j+1]) >> 16;
    }
}