[Mono-dev] Enabling Support for SIMD Intrinsics

[Rodrigo Kumpera]

Well, basically all of it is left. We didn't start it, but it should be
pretty simple once the register allocator is dealt with.

2009/1/23 Justin Holewinski <shawmishrak at gmail.com>

> How much work is left in the port to amd64?  I have only skimmed the code
> for the Mono JIT compiler, but if there are some smaller tasks that need
> done, I could try to help.
>
>
> Thanks,
>
> Justin Holewinski
>
> 2009/1/22 Jerry Maine <crashfourit at gmail.com>
>
>>  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> <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
>> >
>> > _______________________________________________ Mono-devel-list
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>> >
>> >
>> >
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