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Running the test case attached will reproduce this on a DEVICE only using Xam.iOS 7.0.6. In the simulator it seems to work.
Running the same test case on a device with Xam.iOS 7.0.5 works normally.
Might be similar to #17695.
If you comment out the call to Matrix.Identity in Game.cs:line 30 it will work on 7.0.6.
Version: 18.104.22.168 (Business Edition)
Build date: 2013-02-12 20:04:08-0500
Version 4.2.3 (build 54)
Installation UUID: bb00cd30-1c19-4ed5-b390-f732a454afd5
Mono 3.2.6 ((no/9b58377)
GTK+ 2.24.23 theme: Raleigh
Package version: 302060000
MonoGame hotfix 3.0.1
Created attachment 6061 [details]
Created attachment 6062 [details]
Another repro project using Matrix4d.CreatePerspectiveFieldOfView
Here is another very simple project that reproduces the same issue using Matrix4d.CreatePerspectiveFieldOfView.
@John the list of version you supplied shows 7.0.5 (not 7.0.6). Does it happens on both ? or just in 7.0.6 ?
@Marco Can you try the 7.0.7 (beta channel) ?
There was an ARM (device specific) bug in 7.0.6 that could cause some weird behavior (register spilling). That's fixed in 7.0.7 (one of the reasons for doing an hotfix release).
I can confirm that the problem still occurs with 7.0.7 from the Beta channel.
Thanks for the perfect test case.
Here is a simpler one:
private void Render ()
Func (0, 0, 0, 0, 0, 0, 0);
private void Func (double m00, double m01, double m02, double m03, double m10, double m11, double m12)
this clobbers d8. Here's the generated assembly: https://gist.github.com/rolfbjarne/a13236466be2cfcc2231
Alex, thanks for the help.