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@ -584,6 +584,31 @@ static inline int u_bit_scan(unsigned *mask) |
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return i; |
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return i; |
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} |
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} |
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/* For looping over a bitmask when you want to loop over consecutive bits
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* manually, for example: |
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* |
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* while (mask) { |
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* int start, count, i; |
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* |
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* u_bit_scan_consecutive_range(&mask, &start, &count); |
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* |
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* for (i = 0; i < count; i++) |
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* ... process element (start+i) |
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* } |
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*/ |
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static inline void |
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u_bit_scan_consecutive_range(unsigned *mask, int *start, int *count) |
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{ |
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if (*mask == 0xffffffff) { |
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*start = 0; |
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*count = 32; |
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*mask = 0; |
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return; |
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} |
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*start = ffs(*mask) - 1; |
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*count = ffs(~(*mask >> *start)) - 1; |
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*mask &= ~(((1u << *count) - 1) << *start); |
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} |
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/**
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/**
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* Return float bits. |
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* Return float bits. |
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