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chg: micro opt..

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iceman1001
2017-12-12 22:08:55 +01:00
parent 453831268a
commit 972fb2e167
1 changed files with 5 additions and 9 deletions
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14
client/cmdhfmfhard.c
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@@ -1697,16 +1697,12 @@ static inline bool bitflips_match(uint8_t byte, uint32_t state, odd_even_t odd_e
} }
static uint_fast8_t reverse(uint_fast8_t byte) static uint_fast8_t reverse(uint_fast8_t b)
{ {
uint_fast8_t rev_byte = 0; b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
for (uint8_t i = 0; i < 8; i++) { b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
rev_byte <<= 1; return b;
rev_byte |= (byte >> i) & 0x01;
}
return rev_byte;
} }