MSP430 IAR C/C++ Compiler reference guide - Rice University

Descriptions of intrinsic functions__get_R4_registerSyntaxDescriptionunsigned short __get_R4_register(void);Returns the value of the R4 register. This intrinsic function is only available when theregister is locked.See also --lock_r4, page 154__get_R5_registerSyntaxDescriptionunsigned short __get_R5_register(void);Returns the value of the R5 register. This intrinsic function is only available when theregister is locked.See also --lock_r5, page 154__get_SP_registerSyntaxDescriptionunsigned short __get_SP_register(void);Returns the value of the stack pointer register SP.__get_SR_registerSyntaxDescriptionunsigned short __get_SR_register(void);Returns the value of the processor status register SR.__get_SR_register_on_exitSyntaxDescriptionunsigned short __get_SR_register_on_exit(void);Returns the value that the processor status register SR will have when the currentinterrupt or monitor function returns.This intrinsic function is only available in interrupt and monitor functions.222MSP430 IAR C/C++ CompilerReference Guide