static int pix_norm1_altivec(uint8_t *pix, int line_size) { int i, s = 0; const vector unsigned int zero = (const vector unsigned int) vec_splat_u32(0); vector unsigned int sv = (vector unsigned int) vec_splat_u32(0); vector signed int sum; for (i = 0; i < 16; i++) { /* Read the potentially unaligned pixels. */ //vector unsigned char pixl = vec_ld(0, pix); //vector unsigned char pixr = vec_ld(15, pix); //vector unsigned char pixv = vec_perm(pixl, pixr, perm); vector unsigned char pixv = vec_vsx_ld(0, pix); /* Square the values, and add them to our sum. */ sv = vec_msum(pixv, pixv, sv); pix += line_size; } /* Sum up the four partial sums, and put the result into s. */ sum = vec_sums((vector signed int) sv, (vector signed int) zero); sum = vec_splat(sum, 3); vec_vsx_st(sum, 0, &s); return s; }