Jonas Ådahl 8420692d3e cogl: Add soft-float software implementation
The implementation comes from mesa, which came from Berkeley SoftFloat
3e Library.

The software float implementation will be used to convert from and to
half floating point pixel format bitmaps, when no the CPU isn't capable
of the conversion.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3441>
2023-12-06 21:18:11 +01:00
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