Thanks for your anwer.
It's my misreading.
On Thursday, June 10, 2021 at 2:25:31 PM UTC+8 axel.wa...@googlemail.com
wrote:
> The comment says "Advance two words", so I assume no?
>
> On Thu, Jun 10, 2021 at 6:14 AM steve wang <steve....@gmail.com> wrote:
>
>> go 1.16.5
>> runtime/mbitmap.go:946
>>
>> 1. switch h.shift {
>> 2. case 0:
>> 3. *h.bitp &^= mask3 << 0
>> 4. *h.bitp |= hb << 0
>> 5. case 1:
>> 6. *h.bitp &^= mask3 << 1
>> 7. *h.bitp |= hb << 1
>> 8. case 2:
>> 9. *h.bitp &^= mask2 << 2
>> 10. *h.bitp |= (hb & mask2) << 2
>> 11. // Two words written to the first byte.
>> 12. // Advance two words to get to the next byte.
>> 13. h = h.next().next() // line:946 <=== shouldn't it be
>> "h=h.next()"???
>> 14. *h.bitp &^= mask1
>> 15. *h.bitp |= (hb >> 2) & mask1
>> 16. case 3:
>> 17. *h.bitp &^= mask1 << 3
>> 18. *h.bitp |= (hb & mask1) << 3
>> 19. // One word written to the first byte.
>> 20. // Advance one word to get to the next byte.
>> 21. h = h.next()
>> 22. *h.bitp &^= mask2
>> 23. *h.bitp |= (hb >> 1) & mask2
>> 24. }
>>
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