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20 lines
354 B
C
20 lines
354 B
C
#include "util.h"
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// bit population
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int bitpop(uint8_t bits)
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{
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int c;
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for (c = 0; bits; c++)
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bits &= bits -1;
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return c;
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}
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// most significant on-bit
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int biton(uint8_t bits)
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{
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int n = 0;
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if (bits >> 4) { bits >>= 4; n += 4;}
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if (bits >> 2) { bits >>= 2; n += 2;}
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if (bits >> 1) { bits >>= 1; n += 1;}
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return n;
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}
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