issue group for pentium4

[ranjith kumar]

Hi
   1) "Issue group" is a set of instructions which can
be issued to different execution units at same time so
that many execution units can be executed parallely.

 Can any one tell any sourse where I can get the
information such as which set of instructions are
called as  an issue group(in case of pentium 4
processor only).                         

  2) Compilers exploit such a feature by reodering
instructions. 
 But Pentium 4 processor reoders instructions to do
the same thing.
 So reordering by compilers is unnessecary. 

Am I right????????????

3)How many instructions  does Pentium 4 processor can
look insatantly to reorder instructions?

 

 


 
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