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jeremybenn |
#include <altivec.h>
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static vector unsigned char select2 = {2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2};
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static vector unsigned char select3 = {4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4};
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static vector unsigned char select4 = {8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8};
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static vector unsigned char select5 = {16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16};
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static vector unsigned char select6 = {32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32};
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static vector unsigned char select7 = {64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64};
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static vector unsigned char select8 = {128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128};
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static vector unsigned char control1
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control2
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control3
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control4
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control5
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control6
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control7
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char control8
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= {15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0};
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static vector unsigned char rotate1 = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
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static vector unsigned char rotate2 = {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
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static vector unsigned char rotate3 = {5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5};
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static vector unsigned char rotate4 = {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7};
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static vector unsigned char rotate5 = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
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static vector unsigned char rotate6 = {3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3};
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static vector unsigned char rotate7 = {5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5};
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static vector unsigned char rotate8 = {7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7};
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static vector unsigned char permute_128(vector unsigned char input)
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{
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vector unsigned char result, new_bit;
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/* and now the code */
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result = vec_vperm(input, input, control1);
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result = vec_rl(result, rotate1);
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new_bit = vec_vperm(input, input, control2);
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new_bit = vec_rl(new_bit, rotate2);
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result = vec_sel(result, new_bit, select2);
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new_bit = vec_vperm(input, input, control3);
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new_bit = vec_rl(new_bit, rotate3);
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result = vec_sel(result, new_bit, select3);
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new_bit = vec_vperm(input, input, control4);
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new_bit = vec_rl(new_bit, rotate4);
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result = vec_sel(result, new_bit, select4);
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new_bit = vec_vperm(input, input, control5);
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new_bit = vec_rl(new_bit, rotate5);
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result = vec_sel(result, new_bit, select5);
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new_bit = vec_vperm(input, input, control6);
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new_bit = vec_rl(new_bit, rotate6);
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result = vec_sel(result, new_bit, select6);
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new_bit = vec_vperm(input, input, control7);
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new_bit = vec_rl(new_bit, rotate7);
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result = vec_sel(result, new_bit, select7);
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new_bit = vec_vperm(input, input, control8);
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new_bit = vec_rl(new_bit, rotate8);
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result = vec_sel(result, new_bit, select8);
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return result;
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}
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int main()
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{
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vector unsigned char input
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= {0,1,2,4,8,16,32,64,128,0,1,2,4,8,16,32};
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vector unsigned char result = permute_128(input);
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return 0;
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}
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