floating point - Scope of MXCSR control register? -

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i'm wondering lifetime of value stored in mxcsr control register (including ftz , daz config denormal floating-point numbers): in scope of thread, or common processing on cpu/fpu?

what want know if need set (mxcsr) @ needs @ beginning of each thread of thread pool, or once in app, or impact else in app and/or system?

thanks help!

yes of course, must set mxcsr register @ beginning of each thread. thread can have own mxcsr settings, essential feature.


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