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Tomasulo+ROB Example

Reservation station gains a column

All tags now refer to ROB entries Begin our simulation with Time = 0

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Tomasulo+ROB Example

Time = 1

First L. issues

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Tomasulo+ROB Example

Time = !

Loa"1 e#ecutes $"one at t=%& 'econ" L. issues

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Tomasulo+ROB Example

Time=(

Loa"! e#ecutes $"one at t=)& *+L. issues

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Tomasulo+ROB Example

Time=%

Loa"1 ,rites '+B. issues

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Tomasulo+ROB Example

Time=)

ROB-1 commits Loa"! ,rites A""1 / *ult1 u"ate will e rea"2

to e#ecute ne#t c2cle 34. issues

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Tomasulo+ROB Example

Time=5

ROB-! commits '+B. an" *+L. e#ecute $6nish at

t=78 t=158 res&

A. issues

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Tomasulo+ROB Example

Time=7

A""1 writesA""! u"ates an" will e

rea"2 to e#ecute ne#t c2cle

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Tomasulo+ROB Example

Time=9

A""! e#ecutes $6nish at t=11&

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Tomasulo+ROB Example

Time=11

A""! writes

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Tomasulo+ROB Example

Time=15

*ult1 writes *ult! u"ates $will e rea"2 toe#ecute ne#t c2cle&

:uestion;