#4928: Add primops for copying/cloning an array
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Reporter: tibbe | Owner: simonmar
Type: feature request | Status: patch
Priority: normal | Milestone:
Component: Runtime System | Version: 7.0.1
Resolution: | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: None/Unknown |
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Comment(by simonmar):
On the whole, the patch looks good (especially if you squash it into one
patch, which I'll do before pushing unless you do). I think there might
still be some problems in the implementation though:
{{{
+ I8[dst_cards_start + mutArrPtrsCardWords(n)] = I8[dst_cards_start +
mutArrPtrsCardWords(dst_start + n)] | I8[src_cards_start +
mutArrPtrsCardWords(src_start + n)]; \
}}}
this can't be right, because all offsets in Cmm are in bytes, and you're
adding a word index (`mutArrPtrsCardWords(n)`).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4928#comment:11>
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