Functional Unit Constraints
Pipeline4-50 SPRU733
Table 4−34 shows the instruction constraints for INTDP instructions executing
on the .L unit.
Table 4−34. INTDP .L-Unit Instruction Constraints
Instruction Execution
Cycle 1 2 3 4 5 6
INTDP R W W
Instruction Type
Subsequent Same-Unit Instruction Executable
Single-cycle Xw Xw
4-cycle Xw
INTDP
Xw
ADDDP/SUBDP
Instruction Type
Same Side, Different Unit, Both Using Cross Path Executable
Single-cycle
DP compare
2-cycle DP
4-cycle
Load
Store
Branch
16 × 16 multiply
MPYI
MPYID
MPYDP
Legend: = E1 phase of the single-cycle 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
constraint