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#include <altivec.h>

static vector unsigned char select2 = {2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2};

static vector unsigned char select3 = {4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4};

static vector unsigned char select4 = {8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8};

static vector unsigned char select5 = {16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16};

static vector unsigned char select6 = {32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32};

static vector unsigned char select7 = {64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64};

static vector unsigned char select8 = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};

static vector unsigned char control1

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control2

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control3

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control4

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control5

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control6

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control7

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char control8

  = {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};

static vector unsigned char rotate1 = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};

static vector unsigned char rotate2 = {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};

static vector unsigned char rotate3 = {5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5};

static vector unsigned char rotate4 = {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7};

static vector unsigned char rotate5 = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};

static vector unsigned char rotate6 = {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};

static vector unsigned char rotate7 = {5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5};

static vector unsigned char rotate8 = {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7};

static vector unsigned char permute_128(vector unsigned char input)

{

  vector unsigned char result, new_bit;

  /* and now the code */

  result = vec_vperm(input, input, control1);

  result = vec_rl(result, rotate1);

  new_bit = vec_vperm(input, input, control2);

  new_bit = vec_rl(new_bit, rotate2);

  result = vec_sel(result, new_bit, select2);

  new_bit = vec_vperm(input, input, control3);

  new_bit = vec_rl(new_bit, rotate3);

  result = vec_sel(result, new_bit, select3);

  new_bit = vec_vperm(input, input, control4);

  new_bit = vec_rl(new_bit, rotate4);

  result = vec_sel(result, new_bit, select4);

  new_bit = vec_vperm(input, input, control5);

  new_bit = vec_rl(new_bit, rotate5);

  result = vec_sel(result, new_bit, select5);

  new_bit = vec_vperm(input, input, control6);

  new_bit = vec_rl(new_bit, rotate6);

  result = vec_sel(result, new_bit, select6);

  new_bit = vec_vperm(input, input, control7);

  new_bit = vec_rl(new_bit, rotate7);

  result = vec_sel(result, new_bit, select7);

  new_bit = vec_vperm(input, input, control8);

  new_bit = vec_rl(new_bit, rotate8);

  result = vec_sel(result, new_bit, select8);

  return result;

}

int main()

{

  vector unsigned char input

    = {0,1,2,4,8,16,32,64,128,0,1,2,4,8,16,32};

  vector unsigned char result = permute_128(input);

  return 0;

}