Cray CRAY-1 - Page 141

r----------------------------------------------------------------------
150ijk
151ijk
Single
shift of (Vj elements) left by (Ak) places to
Vi elements
Single
shift of (Vj elements) right by (Ak) places to
Vi elements
~----------------------------------------------------------------------
These instructions are executed in the vector shift unit. The number
of operations performed is determined by the contents of the VL register.
Operations start with element 0 of the Vi and Vj registers and end with
I elements specified by the contents of VL-l.
All shifts are end-off with zero fill. The shift count is obtained
from (Ak) and elements of Vi are cleared if the shift count exceeds 63.
Hold issue conditions
034 - 037 in process
Exchange in process
Vi or Vj reserved
Ak reserved
150 - 153 in process, unit busy (VL) + 4 CPs
Execution time
Instruction issue 1
CP
Vi ready 11 CPs if (VL) ~ 5
Vi ready (VL) + 6 CPs if (VL) > 5
Vj ready 5 CPs if (VL) ~ 5
Vj ready (VL) CPs if (VL) > 5
Unit ready (VL) + 4 CPs
Chain slot ready 6 CPs
Special cases
(Ak) = 1 if k = 0
2240004
4-55
E-01