堆栈操作.txt

TMS320VC5402 DSK的例程

.title “CONTEXT SAVE/RESTORE on SUBROUTINE or INTERRUPT

CONTEXT_SAVE .macro
PSHM AG 		;Save 8 guard bits of accA
PSHM AH 		;Save upper 16 bits of accA
PSHM AL 		;Save lower 16 bits of accA
PSHM BG 		;Save 8 guard bits of accB
PSHM BH 		;Save upper 16 bits of accB
PSHM BL 		;Save lower 16 bits of accB
PSHM TRN 		;Save transition register
PSHM T 			;Save temporary register
PSHM AR7 		;Save AR7
PSHM AR6 		;Save AR6
PSHM AR5 		;Save AR5
PSHM AR4 		;Save AR4
PSHM AR3 		;Save AR3
PSHM AR2 		;Save AR2
PSHM AR1 		;Save AR1
PSHM AR0 		;Save AR0
PSHM ST0 		;Save ST0
PSHM ST1 		;Save ST1
PSHM BK 		;Save circular size register
PSHM IMR 		;Save interrupt mask register
PSHM BRC 		;Save block repeat counter
PSHM REA 		;Save block repeat end address
PSHM RSA 		;Save block repeat start address
PSHM PMST 		;Save PMST register
.endm


CONTEXT_RESTORE .macro
POPM PMST 		;Restore PMST register
POPM RSA 		;Restore block repeat start address
POPM REA 		;Restore block repeat end address
POPM BRC 		;Restore block repeat counter
POPM IMR 		;Restore interrupt mask register
POPM BK 		;Restore circular size register
POPM ST1 		;Restore ST1
POPM ST0 		;Restore ST0
POPM AR0 		;Restore AR0
POPM AR1 		;Restore AR1
POPM AR2 		;Restore AR2
POPM AR3 		;Restore AR3
POPM AR4 		;Restore AR4
POPM AR5 		;Restore AR5
POPM AR6 		;Restore AR6
POPM AR7 		;Restore AR7
POPM T 			;Restore temporary register
POPM TRN 		;Restore transition register
POPM BL 		;Restore lower 16 bits of accB
POPM BH 		;Restore upper 16 bits of accB
POPM BG 		;Restore 8 guard bits of accB
POPM AL 		;Restore lower 16 bits of accA
POPM AH 		;Restore upper 16 bits of accA
POPM AG 		;Restore 8 guard bits of accA
.endm