gcc/testsuite/gcc.dg/torture/pr72851.c

   1 /* { dg-do compile } */
   2
   3 typedef unsigned char uint8_t;
   4 typedef unsigned long int uint64_t;
   5 union unaligned_64 {
   6     uint64_t l;
   7 }
   8 __attribute__((packed)) __attribute__((may_alias));
   9 typedef struct AVDES {
  10     uint64_t round_keys[3][16];
  11 } AVDES;
  12 static const uint8_t PC1_shuffle[] = {
  13     64-57,64-49,64-41,64-33,64-25,64-17,64-9,     64-1,64-58,64-50,64-42,64-34,64-26,64-18,     64-10,64-2,64-59,64-51,64-43,64-35,64-27,     64-19,64-11,64-3,64-60,64-52,64-44,64-36,     64-63,64-55,64-47,64-39,64-31,64-23,64-15,     64-7,64-62,64-54,64-46,64-38,64-30,64-22,     64-14,64-6,64-61,64-53,64-45,64-37,64-29,     64-21,64-13,64-5,64-28,64-20,64-12,64-4 };
  14 static const uint8_t PC2_shuffle[] = {
  15     56-14,56-17,56-11,56-24,56-1,56-5,     56-3,56-28,56-15,56-6,56-21,56-10,     56-23,56-19,56-12,56-4,56-26,56-8,     56-16,56-7,56-27,56-20,56-13,56-2,     56-41,56-52,56-31,56-37,56-47,56-55,     56-30,56-40,56-51,56-45,56-33,56-48,     56-44,56-49,56-39,56-56,56-34,56-53,     56-46,56-42,56-50,56-36,56-29,56-32 };
  16 static uint64_t shuffle(uint64_t in, const uint8_t *shuffle, int shuffle_len)
  17 {
  18   int i;
  19   uint64_t res = 0;
  20   for (i = 0; i < shuffle_len; i++)
  21     res += res + ((in >> *shuffle++) & 1);
  22   return res;
  23 }
  24 void gen_roundkeys(uint64_t K[16], uint64_t key)
  25 {
  26   int i;
  27   uint64_t CDn = shuffle(key, PC1_shuffle, sizeof(PC1_shuffle));
  28   for (i = 0; i < 16; i++)
  29     K[i] = shuffle(CDn, PC2_shuffle, sizeof(PC2_shuffle));
  30 }