IBM 5280 Distributed Data System - Index of

Binary Register Shift or Rotate (SL/SR/RL/RR)1-16Source: 1-81-32Object:8 15D IfJ IIIID Shift or rotate, bits 8 and 9:00 = SL (shift left)10 = SR (shift right)01 = R L (rotate left)11 = R R (rotate right)II Register type, bits 10 and 11:00 = Binary half-register (BRn(l)) of 1 byte01 = Binary full register (BRn) of 2 bytes10 = Binary double register (BRn(4)) of 4 bytes, with the high-order bitof the shift/rotate count = 011 = Binary double-register (BRn(4)) of 4 bytes, with the high-order bitof the shift/rotate count = 1II Shift or rotate count: For a full register, the number minus 1 (hex O-F) of bitsto shift/rotate. For a half register, the number minus 1 (hex 0-7) of bits toshift/rotate. For a double register,-the low-order 4 bits of the number minus 1(hex 00-1 F) of bits to shift/rotate.II Result register address: The address of the binary register or labeled area thatcontains the data to shift/rotate and that will contain the shifted/rotated data.The contents of the result register is shifted or rotated as specified. Shift operationsmove the contents of the register out of one end of the register and set the bits fromwhich data was shifted to zero.Rotate operations move the contents of the register out of one end and into theother end of the register.Object Code Instruction Format 245