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add: reflect48
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2 changed files with 8 additions and 0 deletions
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@ -144,6 +144,13 @@ uint32_t reflect32(uint32_t b) {
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return v;
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}
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uint64_t reflect48(uint64_t v) {
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uint64_t vhi = reflect16(v >> 32);
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uint64_t vlo = reflect32(v);
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v = (vlo << 32) | (vhi & 0xFFFF);
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return v;
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}
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uint64_t reflect64(uint64_t b) {
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// https://graphics.stanford.edu/~seander/bithacks.html#BitReverseTable
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uint64_t v = b; // 64-bit word to reverse bit order
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@ -74,6 +74,7 @@ uint32_t reflect(uint32_t v, int b); // used in crc.c ...
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uint8_t reflect8(uint8_t b); // dedicated 8bit reversal
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uint16_t reflect16(uint16_t b); // dedicated 16bit reversal
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uint32_t reflect32(uint32_t b); // dedicated 32bit reversal
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uint64_t reflect48(uint64_t b); // dedicated 48bit reversal
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uint64_t reflect64(uint64_t b); // dedicated 64bit reversal
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void num_to_bytes(uint64_t n, size_t len, uint8_t *dest);
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