The Newton engine is now Open source with a zlib license.

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Re: The Newton engine is now Open source with a zlib license

Postby JernejL » Mon Mar 07, 2011 3:37 pm

I will keep on dreaming of a GCC win32 newton.dll build.. :)
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Re: The Newton engine is now Open source with a zlib license

Postby Julio Jerez » Mon Mar 07, 2011 3:47 pm

Hey Delfi we migh be able to do even better than a GCC dll version for windows.

Intel is working on a OpenCL for X86 using SSE, and it is using the Intel compiler which apparenlly is even better than GCC.
I dowloaded already and as soon as I complete the subtitution of the intrinsics to use the new class, I will start workin of the OpenCL support.
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Re: The Newton engine is now Open source with a zlib license

Postby Julio Jerez » Mon Mar 07, 2011 8:18 pm

yes the arm7 do has float intrisics
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0348a/BABCIHBH.html

The only thing is to find out of the MAC SDK allows it, which I cannot imagine why it would not.
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Re: The Newton engine is now Open source with a zlib license

Postby martinsm » Tue Mar 08, 2011 4:15 am

I already posted link to GCC ARM NEON intrinsics some time ago: viewtopic.php?p=37964#p37964 :)
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Re: The Newton engine is now Open source with a zlib license

Postby martinsm » Tue Mar 08, 2011 5:46 am

Delfi wrote:I will keep on dreaming of a GCC win32 newton.dll build.. :)

I found that you can create makefile for that without any source modifications!
1) checkout latest 2.x source:
Code: Select all
svn checkout http://newton-dynamics.googlecode.com/svn/trunk/coreLibrary_200 newton-dynamic

2) Put both files from attachment of this post into projects\windows directory
3) run mingw32-make command from projects\windows directory
You will get in output static library libNewton.a and Newton.dll file with it's import library libNewton.dll.a file.

I tested building with official MinGW GCC v4.5.2. I you're using other (like TDM-GCC), then it's possible some tweaks to commandline will be necessary.
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Re: The Newton engine is now Open source with a zlib license

Postby JernejL » Tue Mar 08, 2011 7:12 am

It doesn't help me since i can't compile anything - i got very little experience with mingw and other related tools..
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Re: The Newton engine is now Open source with a zlib license

Postby martinsm » Tue Mar 08, 2011 7:25 am

Then I don't get it - why do you need GCC compiled Newtond.dll file? What's wrong with MSVC compiled Newton.dll file?
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Re: The Newton engine is now Open source with a zlib license

Postby JernejL » Tue Mar 08, 2011 9:50 am

supposedly the GCC generates faster and better optimized code.
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Re: The Newton engine is now Open source with a zlib license

Postby Julio Jerez » Tue Mar 08, 2011 11:41 pm

martinsm wrote:Oh, and by the way during porting I found small bug in Newton. When building TreeCollision NewtonTreeCollisionEndBuild was ignoring optimize parameter. I needed to passs there false (to not to optimize), because Newton was crashing when optimize=true.


Martinsm I foudn teh bug that was making newtn crash, I beleive you were amkin a floor whe all teh face were coplanar, an dteh optimizer merged then to a single polygon.
The code was asumin thet the root of the tree will have children, and that was making the build process fail.
I fixed and checked it in, if you sinc to SVN it should be fine now.
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Re: The Newton engine is now Open source with a zlib license

Postby thedmd » Thu Mar 10, 2011 3:49 pm

Julio, you may find this interesting. One of the bugfixes in the VS2010 SP1 is "C++ compiler generates incorrect movups instructions iso movss" http://connect.microsoft.com/VisualStudio/feedback/details/548432.
Maybe this also solve the problem with simd_128 class and wrong alignment.
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Re: The Newton engine is now Open source with a zlib license

Postby martinsm » Thu Mar 10, 2011 5:20 pm

Julio Jerez wrote:Martinsm I foudn teh bug that was making newtn crash, I beleive you were amkin a floor whe all teh face were coplanar, an dteh optimizer merged then to a single polygon.
The code was asumin thet the root of the tree will have children, and that was making the build process fail.
I fixed and checked it in, if you sinc to SVN it should be fine now.


Thanks. I took & compiled latest source - and can confirm that this fixed bug on Android. I indeed was creating TreeCollision with all faces coplanar. Now I have no problem creating these (and all other) TreeCollisions with optimized flag = true.

thedmd wrote:Maybe this also solve the problem with simd_128 class and wrong alignment.

I really doubt that has something to do with passing arguments on stack unaligned. I guess it's problem of Windows OS ABI by design.
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Re: The Newton engine is now Open source with a zlib license

Postby Julio Jerez » Thu Mar 10, 2011 6:37 pm

thedmd wrote:Julio, you may find this interesting. One of the bugfixes in the VS2010 SP1 is "C++ compiler generates incorrect movups instructions iso movss" http://connect.microsoft.com/VisualStudio/feedback/details/548432.
Maybe this also solve the problem with simd_128 class and wrong alignment.


you know that is exactly the problem, I am getting the wrong mov intructions, The thing is I am getting with VS 2008, I have not tested with VS2010.
Anyway it is not big deal. we can just simple if def that out and have oen class for MS and one for GCC.
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Re: The Newton engine is now Open source with a zlib license

Postby JernejL » Thu Mar 10, 2011 8:38 pm

martinsm wrote:
Delfi wrote:I will keep on dreaming of a GCC win32 newton.dll build.. :)

I found that you can create makefile for that without any source modifications!
1) checkout latest 2.x source:
Code: Select all
svn checkout http://newton-dynamics.googlecode.com/svn/trunk/coreLibrary_200 newton-dynamic

2) Put both files from attachment of this post into projects\windows directory
3) run mingw32-make command from projects\windows directory
You will get in output static library libNewton.a and Newton.dll file with it's import library libNewton.dll.a file.

I tested building with official MinGW GCC v4.5.2. I you're using other (like TDM-GCC), then it's possible some tweaks to commandline will be necessary.


Can you compile us a single precision newton win32 dll for testing?
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Re: The Newton engine is now Open source with a zlib license

Postby martinsm » Fri Mar 11, 2011 6:11 am

Delfi wrote:Can you compile us a single precision newton win32 dll for testing?

Here you go: http://www.box.net/shared/kd7t4vdcv9
Built from rev282.

Here is alternative if above one is unstable/not working (I played a bit with optimization flags): http://www.box.net/shared/qa75l5rv3v
And here I turned more aggressive optimization flags (should be faster, but may not work at all): http://www.box.net/shared/vr1dnqzvi6

Note that GCC has many useful platform specific optimization flags that can be turned for specific CPU's (like -march=core2 if you have core 2 CPU). That usually will give you really good boost in performance. I built with -march=i686: http://gcc.gnu.org/onlinedocs/gcc/i386- ... tions.html
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Re: The Newton engine is now Open source with a zlib license

Postby JernejL » Fri Mar 11, 2011 1:56 pm

I get a crash in NewtonSetWorldSize:

Code: Select all
  va := makevector(0, -255, 0);
  vb := makevector(255, 0, 8);
  NewtonSetWorldSize(nworld, @va, @vb);


Is this a single or double precision build?
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