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CONFIG_ARC_FPU_SAVE_RESTORE: Enable FPU state persistence across context switch

General informations

The Linux kernel configuration item CONFIG_ARC_FPU_SAVE_RESTORE:

Help text

Double Precision Floating Point unit had dedicated regs which need to be saved/restored across context-switch. Note that ARC FPU is overly simplistic, unlike say x86, which has hardware pieces to allow software to conditionally save/restore, based on actual usage of FPU by a task. Thus our implemn does this for all tasks in system.



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