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Hardware Error in M3 and M4?

Question asked by damh on Nov 29, 2016
Latest reply on Dec 5, 2016 by bauch.aaron.001
if i call the assembly instruction "sub sp, sp, 0xF8" alias "BE B0" (instruction code), the code is executed as a "nop". Checked with F103 and L471.

Does anyone know about that or can confirm this? Is the assembly "sub sp, sp, 0xF8" forbidden?

"sub sp, sp, 0xF4" or "sub sp, sp, 0xFC" are working correctly!

Is there a way to forbid the compiler to use this specific command?