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IBM System/7 Functional Characteristics - All about the IBM 1130 ...

IBM System/7 Functional Characteristics - All about the IBM 1130 ...

IBM System/7 Functional Characteristics - All about the IBM 1130 ...

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Shift right logicalMnemonicExecutiontime (ns)Op codeRModiffierCountHex equivalentDescription of instruction[P]SRL 400* 00010 000 010 X XXXX 1 0 X X Contents of Acc shift right number of countsin Disp[P] SR L 400* 00010 001 010 X XXXX 1 1 X X Contents of XR1 shift right number of countsin Disp[P] SRL 400 * 00010 010 010 X XXXX 1 2 X X Contents of XR 2 shift right number of countsin Disp[P] SRL 400* 00010 011 010 X XXXX 1 3 X X Contents of XR3 shift right number of countsin Disp[P]SRL 400* 00010 100 010 X XXXX 1 4 X X Contents of XR4 shift right number of countsin Disp[P]SRL 400* 00010 101 010 X XXXX 1 5 X X Contents of XR 5 shift right number of countsin Disp[P] SRL 400 * 00010 110 010 X XXXX 1 6 X X Contents of XR6 shift right number of countsin Disp[P] SRL 400 * 00010 111 010 X XXXX 1 7 X X Contents of XR7 shift right number of countsin Disp*Add to execution time: 50N + [50] , where N = number of bits shifted, and [501 = added time for odd number of shift counts.Skip conditionalMnemonicExecutiontime (ns)Op code R Condition bits Hex equivalent Description of instruction[P1 SKC 400 01001 000 XXXX XXXX 4 8 X X Skip conditional <strong>the</strong> next one word of instructionCondition bits for SKC instructionBitMeaning or condition tested8 Overflow save flag9 Carry and overflow indicators both off (condition code 0)10 Result-zero indicator on11 Result-negative indicator on12 Result-positive indicator on13 Result-even indicator on14 Carry indicator off15 Overflow indicator offSee key to symbols on page A-1<strong>System</strong>/7 Instruction Set A-21

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