Texas Instruments TMS320C67X/C67X+ DSP manual 15. Program Counter Values for B IRP Instruction

B IRP Branch Using an Interrupt Return Pointer
Pipeline
						Target Instruction
		Pipeline
			E1	PS	PW	PR	DP	DC	E1
		Stage
		Read	IRP
		Written
		Branch							n
		Taken
		Unit in use	.S2
Instruction Type	Branch
Delay Slots	5
Example	Table 3−15 gives the program counter values and actions for the following
	code example. Given that an interrupt occurred at

PC =

0000 1000

IRP =

0000 1000

0000	0020	B	.S2	IRP
0000	0024	ADD	.S1	A0, A2, A1
0000	0028	MPY	.M1	A1, A0, A1
0000	002C	NOP
0000	0030	SHR	.S1	A1, 15, A1
0000	0034	ADD	.L1	A1, A2, A1
0000	0038	ADD	.L2	B1, B2, B3

Table 3−15. Program Counter Values for B IRP Instruction

Cycle	Program Counter Value	Action
Cycle 0	0000 0020	Branch command executes
		(target code fetched)
Cycle 1	0000 0024
Cycle 2	0000 0028
Cycle 3	0000 002C
Cycle 4	0000 0030
Cycle 5	0000 0034
Cycle 6	0000 1000	Branch target code executes

3-74 Instruction Set SPRU733