How to save HCS12 interrupt state

[AndersJ]

CW for HCS08 provides "intrinsics_hcs12.h".

It provides the "__isflag_int_enabled()" function returning TRUE if interrupts are enabled.

This is useful for pushing and popping interrupt status when a disable is needed

and you do not know if you were called by interrupt or not,

and need to restore proper interrupt enable status.

Is there a similar possibility in CW for HCS12?

Thanks,

Anders J

[kef · Accepted solution]

I'd love intrinsic for carry flag on S12(X). But on S12(X) there're no BMC/BMS instructions like on S08. Such intrinsic function for S12 interrupt flag would generate something like this

   PSHA

   TFR   CCR,A

   BITA   #0x10

   PULA

   BEQ / BNE depending on required branch condition