Texas Instruments TMS320C67X/C67X+ DSP manual 38. Single-Cycle .D-Unit Instruction Constraints

Functional Unit Constraints

Table 4−38 shows the instruction constraints for single-cycle instructions executing on the .D unit.

Table 4−38. Single-Cycle .D-Unit Instruction Constraints

			Instruction Execution
Cycle		1	2
Single-cycle		RW
Instruction Type			Subsequent Same-Unit Instruction Executable
Single-cycle			n
Load			n
Store			n
Instruction Type		Same Side, Different Unit, Both Using Cross Path Executable
16 ⋅ 16 multiply			n
MPYI			n
MPYID			n
MPYDP			n
Single-cycle			n
DP compare			n
2-cycle DP			n
Branch			n
4-cycle			n
INTDP			n
ADDDP/SUBDP			n
	= E1 phase of the single-cycle instruction; R = Sources read for the instruction; W = Destinations written for the
Legend:

instruction; n = Next instruction can enter E1 during cycle

4-54 Pipeline SPRU733