W90210F Winbond Electronics Corp America, W90210F Datasheet - Page 23

• Manufacturer Part Number: W90210F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

IA
IA
IA
CLK
CLK
CLK
6.2 Load use interlock
(1) Correct prediction
(2) Incorrect prediction
Load use interlock: A one-cycle interlock will be forced by hardware when load use dependence occurs.
IF
IF
IF
IA
IA
IA
CLK
CLK
CLK
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FR
FR
FR
IF
IF
IF
IA
IA
IA
CLK
CLK
CLK
EX
EX
EX
FR
FR
FR
IF
IF
IF
Figure 6.2 Pipeline operation for branch prediction.
IA
IA
Figure 6.3 Load-use interlock pipeline operation
CLK
CLK
CLK
MM
MM
MM
EX
EX
EX
FR
FR
FR
IF
IF
23
IA
CLK
CLK
CLK
MM
MM
WR
WR
WR
EX
EX
EX
FR
FR
IF
conditional branch
conditional branch
Load r1
CLK
CLK
CLK
WR
MM
WR
MM
MM
EX
EX
FR
delay slot
delay slot
CLK
CLK
CLK
WR
WR
MM
WR
MM
EX
predict address
predict address (nullified)
r1 used
CLK
CLK
MM
WR
WR
W90210F
correct address
Version 1.4, 10/8/97
WR