[Mono-dev] Enabling Support for SIMD Intrinsics

[Jerry Maine]

Justin, you could help remedy that yourself and finish the simd port
for amd64 in the jit engine or at least help with it.

Rodrigo Kumpera wrote:
> Yes, mono 2.2 and 2.4 will only feature simd support for x86 32
> bits.
>
> 2009/1/22 Justin Holewinski <shawmishrak at gmail.com
> <mailto:shawmishrak at gmail.com>>
>
> Is there a special configure script option to enable the SIMD
> intrinsic optimizations?
>
> I just compiled Mono from the 2.2 sources and compiled/executed the
> following C# code snippet:
>
> Console.WriteLine("SIMD Mode:  {0}",
> SimdRuntime.AccelMode.ToString());
>
> This is printing out  "SIMD Mode:  None" regardless of the -O
> option to mono.  I have tried -O=simd and -O=all.
>
> I also tried the SIMD examples available at
> http://tirania.org/blog/archive/2008/Nov-03.html (linked from Mono
> 2.2 Release Notes) and noticed no difference between the -O=simd
> and -O=-simd comparisons, and both were significantly slower than
> the C version.  This leads me to believe the code snippet above is
> not just lying to me.
>
> This is on Fedora 9 x86_64 with an Intel Core i7 920 processor
> (definitely has SSE support!).  Is SIMD support only available on
> x86 (32-bit)?
>
>
> Thanks,
>
> Justin Holewinski
>
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