Cray CRAY-1 - Page 136

Execution time
Instruction issue:
Both parcels in same buffer 2 CPs
Parcels in different buffers 4 CPs
Second parcel not in a buffer 13 CPs
10h only, Ai ready 11 CPs
12h only, Si ready 11 CPs
Memory ready for next scalar read or store 4 CPs
Special cases
Rank A conflict, 3 CPs delay before Si ready
Rank B conflict, 2 CPs delay before Si ready
Rank C conflict, 1 CP delay before Si ready
Hold storage, 1 CP delay if 070 access conflict occurs
An uncorrected memory parity error will allow 14 CP + 2 parcels
to issue
An out of range error will allow 5 CP + 2 parcels to issue
(Ah) = 0 if h = 0
2240004
4-50
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E