http://d.puremagic.com/issues/show_bug.cgi?id=9190
Summary: Vector operations are not optimized for x86_64
architecture
Product: D
Version: D2
Platform: x86_64
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: druntime
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from Artem Tarasov <[email protected]> 2012-12-20 12:49:53
PST ---
>From what I see in druntime/src/rt/arrayint.d, there are some heavy
optimizations for x86 architecture but not for x86_64.
For instance, in my code replacing a vector operation which resulted in a call
to _arrayExpSliceAddass_k, with a loop, gave me 2x performance boost with -O
-release -inline flags (and even more with LDC compiler).
As a temporary solution (until optimized versions will be written), I suggest
to enhance the following condition by taking target architecture into account:
https://github.com/D-Programming-Language/dmd/blob/master/src/arrayop.c#L304
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