ASK_10_Superskalar.pdf

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Procesory superskalarne

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E FU 0

MEM

Procesory

superskalarne -

scoreboarding

EX

FU 1

IF

IS

RO

WB

…

E FU N

Scoreboard

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1. Zależności danych

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Zależności danych – nowa terminologia

RAW

WAR

WAW

Write After Write

Read After Write

Write After Read

Write

Write

y0 = y1

Read

y0 = 0

y0 = a

y1 = y0

y1 = 1

y0 = b

Read

Write

Write

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2. Scoreboarding

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IF – Instruction Fetch

ID – Instruction Decode

EX – Execute

MEM – Memory Access

WB – Write Back

Scoreboarding

E FU 0

MEM

EX

FU 1

IF

IS

RO

WB

…

E FU N

IS – Instruction Issue

RO – Read Operands

Scoreboard

IF

ID

EX

MEM

WB

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3. Zależności w scoreboarding

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Eliminacja zależności w algorytmie scoreboarding

E FU 0

MEM

EX

IF

IS

RO

WB

…

E FU N

Scoreboard

Strukt.

RAW

WAR

FU 1

WAW

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4. Struktury w scoreboarding

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Struktury wykorzystywane w algorytmie scoreboarding

R

R 0

R 1

R 2

…

R M

Dest

Src

Busy RO WB

EX

F 0

…

F N

…

F 1

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Plik z chomika:

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