27. Consider the program below. a. What does the program do? Be concise. b. Are the...
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27. Consider the program below. a. What does the program do? Be concise. b. Are the list items signed or unsigned? How do you know? c. What value is assigned to the symbol LENGTH by the assembler? d. What specific changes would need to be made to the previous program so that it now worked with words rather than longwords? e. How many times does the BEQ.S instruction execute? COUNT LIST1 LIST2 LENGTH START LOOP ELSE DONE ORG DS.W DC.L 1,2,3,4,5,6,7,8,9,0 DC. L 0,9, 8,7,6,5,4,3,2,1 EQU LEA LEA $400 1 CLR.L MOVE. W TST.W BEQ.S CMPM. L BLE.S ADDQ.W SUBQ.W BRA. S MOVE.W END (*-LIST2)/4 LIST1, A1 LIST2, A2 DO #LENGTH, D1 D1 DONE (A1) +, (A2)+ ELSE #1, DO #1,D1 LOOP DO, COUNT START 27. Consider the program below. a. What does the program do? Be concise. b. Are the list items signed or unsigned? How do you know? c. What value is assigned to the symbol LENGTH by the assembler? d. What specific changes would need to be made to the previous program so that it now worked with words rather than longwords? e. How many times does the BEQ.S instruction execute? COUNT LIST1 LIST2 LENGTH START LOOP ELSE DONE ORG DS.W DC.L 1,2,3,4,5,6,7,8,9,0 DC. L 0,9, 8,7,6,5,4,3,2,1 EQU LEA LEA $400 1 CLR.L MOVE. W TST.W BEQ.S CMPM. L BLE.S ADDQ.W SUBQ.W BRA. S MOVE.W END (*-LIST2)/4 LIST1, A1 LIST2, A2 DO #LENGTH, D1 D1 DONE (A1) +, (A2)+ ELSE #1, DO #1,D1 LOOP DO, COUNT START
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a The program compares two lists LIST1 and LIST2 of longwords and counts the number of elements in L... View the full answer
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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