AN2797 Freescale Semiconductor / Motorola, AN2797 Datasheet - Page 7
AN2797
Manufacturer Part Number
AN2797
Description
Migrating from IBM 750GX to MPC7447A
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN2797.pdf
(32 pages)
Freescale Semiconductor
VPU-E0
VPU-E1
AltiVec Units
Finish
VIU1
Migrating from IBM 750GX to MPC7447A, Rev. 1.0
VR Issue
Queue
(VIQ)
BPU
VIU2-E3
VIU2-E0
VIU2-E1
VIU2-E2
Figure 4. MPC7447A Pipeline Diagram
VFPU-E0
VFPU-E1
VFPU-E2
VFPU-E3
Write-Back
Complete
Decode/Dispatch
FPR Issue
FPU-E0
FPU-E1
FPU-E2
FPU-E3
FPU-E4
Fetch1
Fetch2
Queue
Finish
(FIQ)
IU1
Maximum four-instruction
fetch per clock cycle
Maximum three-instruction
dispatch per clock cycle
Execute Stage
Maximum three-instruction
completion per clock cycle
GPR Issue
IU2-E0
IU2-E1
IU2-E2
Queue
Finish
(GIQ)
LSU-E2
LSU-E0
LSU-E1
Feature Overview
7
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