[Mono-dev] Count leading zeros (or find first one) in Mono.SIMD
Hi, would it be possible to have implemented functionality like count leading zeros in Mono.SIMD? Instructions like these are available on most architectures. Newer SSE instructions would be welcomed too. -- Regards, Konrad ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Count leading zeros (or find first one) in Mono.SIMD
Mono.SIMD needs update to the latest versions of SSE. Right now we're on SSSE. The problem is the lack of engineering bandwidth, I would love to have the 4.X stuff. 2012/2/28 Konrad Kruczyński konrad.kruczyn...@gmail.com Hi, would it be possible to have implemented functionality like count leading zeros in Mono.SIMD? Instructions like these are available on most architectures. Newer SSE instructions would be welcomed too. ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Count leading zeros (or find first one) in Mono.SIMD
On Tue, 2012-02-28 at 11:49 -0300, Rodrigo Kumpera wrote: Mono.SIMD needs update to the latest versions of SSE. Right now we're on SSSE. The problem is the lack of engineering bandwidth, I would love to have the 4.X stuff. I guess I could do some work on it. The questions are: a) whether current API is to be extended or there are some reasons to rebuild it fundamentally? IMO it looks fine, just new (wider) structures and methods need to be added; b) question above applied to the underlying JIT machinery; c) is there any documentation about it or should I just rather look at the source code? -- Regards, Konrad ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Count leading zeros (or find first one) in Mono.SIMD
2012/2/28 Konrad Kruczyński konrad.kruczyn...@gmail.com On Tue, 2012-02-28 at 11:49 -0300, Rodrigo Kumpera wrote: Mono.SIMD needs update to the latest versions of SSE. Right now we're on SSSE. The problem is the lack of engineering bandwidth, I would love to have the 4.X stuff. I guess I could do some work on it. The questions are: a) whether current API is to be extended or there are some reasons to rebuild it fundamentally? IMO it looks fine, just new (wider) structures and methods need to be added; Are you talking about AVX? AVX is a very tricky matter and I don't have an answer for it upfront, but a safe guess is that it will take quite some work and API changes. This is for using the wider 256bits registers. Using AVX with 128bits register is fine. For adding missing instructions, it's just a matter of adding them. Pretty simple. b) question above applied to the underlying JIT machinery; Same as above. c) is there any documentation about it or should I just rather look at the source code? Just look at the source code, those are some entry level changes if you fancy doing so. ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Count leading zeros (or find first one) in Mono.SIMD
Are you talking about AVX? AVX is a very tricky matter and I don't have an answer for it upfront, but a safe guess is that it will take quite some work and API changes. This is for using the wider 256bits registers. Using AVX with 128bits register is fine. Yes, I thought about AVX too, but in that case it may be reserved for future. For adding missing instructions, it's just a matter of adding them. Pretty simple. b) question above applied to the underlying JIT machinery; Same as above. c) is there any documentation about it or should I just rather look at the source code? Just look at the source code, those are some entry level changes if you fancy doing so. Thanks, I'll report if something emerges. -- Konrad ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
