InClassActivity04-sol

# InClassActivity04-sol - 12:38 PM SOLUTIONS Activity#04 Last...

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2/4/02 12:38 PM ECSE-2660 Computer Architecture, Networks, & Operating Systems, Spring 2002 Page 1 of 2 SOLUTIONS Activity #04 Last Name First Name Student ID Number email 4.1 4.2 Total Grader Initials 50 points 50 points 100 points Activity 4.1 (First hour) 1(40) . (a) (10) Translate the C statement a = ( b + c ) to MIPS code. Assume that a, b, c are associated with registers \$s1, \$s2, \$s3 , respectively. add \$s1,\$s2,\$s3 # \$s1=b+c Grading: 10 pts for correct, 5 for valid instruction (b) (10) Translate the C statement a = ( b-c )+( b+d ) to MIPS code without using any temporary registers. Assume that the addresses of a, b, c, d are in registers \$s0, \$s1, \$s2, \$s3 , respectively. You will need 3 instructions: b+b; b+b-c; b+b-c+d. add \$s0,\$s1,\$s1 # \$s0=b+b sub \$s0,\$s0,\$s2 # \$s0=\$s0-c=b+b-c add \$s0,\$s0,\$s3 # \$s0=\$s0+d=b+b-c+d Grading: 10 for correct, 5 for any syntactically correct code. The operations can be done in any order. (c) (20) Translate the C statement

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InClassActivity04-sol - 12:38 PM SOLUTIONS Activity#04 Last...

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