[GHC] #13629: sqrt should use machine instruction on x86_64
GHC
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Fri Apr 28 15:05:22 UTC 2017
#13629: sqrt should use machine instruction on x86_64
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Reporter: bgamari | Owner: (none)
Type: bug | Status: new
Priority: normal | Milestone: 8.4.1
Component: Compiler | Version: 8.0.1
(NCG) |
Keywords: | Operating System: Unknown/Multiple
Architecture: | Type of failure: Runtime
Unknown/Multiple | performance bug
Test Case: | Blocked By:
Blocking: | Related Tickets:
Differential Rev(s): Phab:D3265 | Wiki Page:
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The NCG currently implements the square root MachOp with an out-of-line
call. This resulted in a large performance regression in `n-body` (see
#13570). Fix this.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13629>
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