Explain bits and its function in CPSR? what is need of SPSR?
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Cortex-A Programmer Guide, section 6.8.4 describes the functionality of theMSR/MRS instructions as transferring values between CPSR/SPSR and a general purpose register. LDR/STR are used to transfer single words between memory and general purposeregisters.
MdSaalikFaizan:
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A Saved Program Status Register (SPSR) stores the current value of the CPSR when an exception is taken so that the CPSR can be restored after handling the exception. Each exception handling mode can access its own SPSR.
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