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Functional Unit Hazards
6.3.4
D-Unit Instruction Hazards
Table 6–16. Load .D-Unit Instruction Hazards
Cycle
Load
Instruction Type
Single-cycle
Load
Store
Instruction Type
16
MPYI
MPYID
MPYDP
Single-cycle
DP compare
2-cycle DP
Branch
4-cycle
INTDP
ADDDP/SUBDP
Legend:
6-34
Table 6–16 shows the instruction hazards for load instructions executing on
the .D unit.
1
RW
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
Instruction Execution
2
3
4
5
W
Subsequent Same-Unit Instruction Executable
6
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