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Simple execution model

Instructions are executed one after another. Known and constant execution times (further differentiated into oops (time spent inside the processor) and mems (time spent accessing memory)). Example:

instructionoopsmems
LDOU $0,$254,011
LDOU $1,$254,811
FDIV $2,$0,$1400
MULU $3,$0,$1100
BZ $3,elsewhere1 or 30
ADDU $4,$0,$110
SUBU $5,$0,$110
.........