Comment from Noah Goldstein on interrupts

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Field	Content
replying_to_uid
message	Using the "oldest unretired instruction" model, why is the selected instruction the first in a new retirement block i.e in the first example:

;                            retire cycle
mov    rax,QWORD PTR [rax] ; 0 (execution limited)
nop                        ; 0
nop                        ; 0
nop                        ; 0 <-- oldest unretired on cycle 0
nop                        ; 1 <-- selected nop
nop                        ; 1
nop                        ; 1
nop                        ; 1 <-- oldest unretired on cycle 1
nop                        ; 2 <-- selected nop
nop                        ; 2
nop                        ; 2 <-- oldest unretired on cycle 2
mov    rax,QWORD PTR [rax] ; 4 (execution limited)
nop                        ; 4
nop                        ; 4 <-- oldest unretired on cycle 4

``` |
| name            | Noah Goldstein                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| email           | 5c6c5e08ed042ab5db692956c8c768c2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| date            | 1738625982                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |