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add: fast 8bit reversal.

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iceman1001 2018-01-27 22:20:56 +01:00
commit ede55a1498
5 changed files with 22 additions and 9 deletions
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4
armsrc/util.h
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@ -42,6 +42,10 @@
size_t nbytes(size_t nbits);
uint32_t SwapBits(uint32_t value, int nrbits);
uint32_t reflect(uint32_t v, int b);
// dedicated 8bit reversal
uint8_t reflect8(uint8_t b);
void num_to_bytes(uint64_t n, size_t len, uint8_t* dest);
uint64_t bytes_to_num(uint8_t* src, size_t len);
void rol(uint8_t *data, const size_t len);