Texas Instruments TMS320C67X/C67X+ DSP manual Target Instruction Pipeline Stage Read

BBranch Using a Register

Pipeline

				Target Instruction
Pipeline
	E1	PS	PW	PR	DP	DC	E1
Stage
Read	src2
Written
Branch							n
Taken
Unit in use	.S2

Instruction Type	Branch
Delay Slots	5
Example	Table 3−14 gives the program counter values and actions for the following
	code example. In this example, the B10 register holds the value 1000 000Ch.
		B10	1000 000Ch
	1000	0000		B	.S2	B10
	1000	0004		ADD	.L1	A1, A2, A3
	1000	0008		ADD	.L2	B1, B2, B3
	1000	000C		MPY	.M1X A3, B3, A4
	1000	0010		SUB	.D1	A5, A6, A6
	1000	0014		MPY	.M1	A3, A6, A5
	1000	0018		MPY	.M1	A6, A7, A8
	1000	001C		SHR	.S1	A4, 15, A4
	1000	0020		ADD	.D1	A4, A6, A4

Table 3−14. Program Counter Values for Example Branch Using a Register

Cycle	Program Counter Value		Action
Cycle 0	1000	0000h	Branch command executes
			(target code fetched)
Cycle 1	1000	0004h
Cycle 2	1000	000Ch
Cycle 3	1000	0014h
Cycle 4	1000	0018h
Cycle 5	1000	001Ch
Cycle 6	1000	000Ch	Branch target code executes
Cycle 7	1000	0014h

3-72 Instruction Set SPRU733