Store Execution Block Diagram - Texas Instruments TMS320C6000 Series Reference Manual

Pipeline Execution of Instruction Types
Figure 5–13. Store Execution Block Diagram
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When you perform a load and a store to the same memory location, these rules
apply ( i = cycle):
When a load is executed before a store, the old value is loaded and the
new value is stored.
i LDW
i + 1 STW
When a store is executed before a load, the new value is stored and the
new value is loaded.
i STW
i + 1 LDW
When the instructions are executed in parallel, the old value is loaded first
and then the new value is stored, but both occur in the same phase.
i STW
i || LDW
There is additional explanation of why stores have zero delay slots in section
5.2.4.
Functional
unit
.D
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Register file
Data
Memory controller
Memory
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Address
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