Issue 107: Save/restore the MXU context
Reported by Paul Cercueil, Aug 28, 2012
MXU are a set of SIMD instructions provided by Ingenic's jz47xx SoCs: http://wiki.dingoonity.org/index.php?title=Development:MXU Currently, during a task switch, only the regular registers are saved on the thread's context structure. As a result, only one thread can use the MXU instructions, or corruption happens. Therefore, the MXU registers should be saved as well. This is "low priority" because there is no known Linux app that makes use of that instruction set yet.
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