Texas Instruments TMS320C6000 Series Reference Manual page 315

Table 6–5. 2-Cycle DP .S-Unit Instruction Hazards
Cycle
2-cycle
Instruction Type
Single-cycle
DP compare
2-cycle DP
Branch
Instruction Type
Single cycle
Load
Store
INTDP
ADDDP/SUBDP
16
4-cycle
MPYI
MPYID
MPYDP
Legend:
Table 6–5 shows the instruction hazards for 2-cycle DP instructions executing
on the .S unit.
1
RW W
Xw
Xw
Same Side, Different Unit, Both Using Cross Path Executable
16 multiply
E1 phase of the single-cyle instruction
R Sources read for the instruction
W Destinations written for the instruction
Next instruction can enter E1 during cycle
Xw Next instruction cannot enter E1 during cycle–write hazard
Instruction Execution
2 3
Subsequent Same-Unit Instruction Executable
Functional Unit Hazards
TMS320C67x Pipeline 6-23