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CS 218 – MIPS Assignment #1

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Purpose: Become familiar with RISC Architecture concepts, the MIPS Architecture, and QtSpim (the MIPS simulator). Points: 45 Assignment: Write a MIPS assembly language program to calculate the area of each trapezoid in a set of trapezoids. The sides should be read from wordsized aSides , cSides, and heights arrays. The result must be stored into the word-sized tAreas array. Below is the formula to calculate the area of a trapezoid: tAreas[ n] = ( heights[ n] × ( aSides[n] + cSides[ n]) 2 ) After all the trapezoid areas have been calculated, the program should find the minimum, middle value, maximum, sum, and average for the trapezoid areas array. The program must display the results to the console window. The output should look something like the following (with the correct answers displayed): MIPS Assignment #1 Program to calculate area of each trapezoid in a series of trapezoids. Also finds min, med, max, sum, and average for the trapezoid areas. 1 4 9 16 25 36 49 64 81 100 2346 4294 6588 9035 10656 12684 14651 18512 21390 24231 31668 35690 39559 44454 49848 53872 56330 62746 66920 71295 106800 113120 [… display all numbers …] Trapezoid areas min = 1 Trapezoid areas med = ? Trapezoid areas max = ? Trapezoid areas sum = ? Trapezoid areas ave = ? a c height Submission: • All source files must assemble and execute with QtSpim/SPIM MIPS simulator. • Submit source file ◦ Submit a copy of the program source file via the on-line submission • Once you submit, the system will score the project and provide feedback. ◦ If you do not get full score, you can (and should) correct and resubmit. ◦ You can re-submit an unlimited number of times before the due date/time. • Late submissions will be accepted for a period of 24 hours after the due date/time for any given lab. Late submissions will be subject to a ~2% reduction in points per an hour late. If you submit 1 minute – 1 hour late -2%, 1-2 hours late -4%, … , 23-24 hours late -50%. This means after 24 hours late submissions will receive an automatic 0. Program Header Block All source files must include your name, section number, assignment, NSHE number, and program description. The required format is as follows: # Name: # NSHE ID: # Section:

# Assignment: # Description: Failure to include your name in this format will result in a reduction of points. Scoring Rubric Scoring will include functionality, code quality, and documentation. Below is a summary of the scoring rubric for this assignment. Criteria Weight Summary Assemble – Failure to assemble will result in a score of 0. Program Header 3% Must include header block in the required format (see above). General Comments 7% Must include an appropriate level of program documentation. Program Functionality (and on-time) 90% Program must meet the functional requirements as outlined in the assignment. Must be submitted on time for full score. Data Declarations Use the following data declarations: aSides: .word 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 .word 15, 25, 33, 44, 58, 69, 72, 86, 99, 101 .word 107, 121, 137, 141, 157, 167, 177, 181, 191, 199 .word 202, 209, 215, 219, 223, 225, 231, 242, 244, 249 .word 251, 253, 266, 269, 271, 272, 280, 288, 291, 299 .word 369, 374, 377, 379, 382, 384, 386, 388, 392, 393 .word 1469, 2474, 3477, 4479, 5482, 5484, 6486, 7788, 8492, 1493 cSides: .word 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 .word 32, 51, 76, 87, 90, 100, 111, 123, 132, 145 .word 206, 212, 222, 231, 246, 250, 254, 278, 288, 292 .word 332, 351, 376, 387, 390, 400, 411, 423, 432, 445 .word 457, 487, 499, 501, 523, 524, 525, 526, 575, 594 .word 634, 652, 674, 686, 697, 704, 716, 720, 736, 753 .word 1782, 2795, 3807, 3812, 4827, 5847, 6867, 7879, 7888, 1894 heights: .word 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 .word 102, 113, 122, 139, 144, 151, 161, 178, 186, 197 .word 203, 215, 221, 239, 248, 259, 262, 274, 280, 291 .word 400, 404, 406, 407, 424, 425, 426, 429, 448, 492 .word 501, 513, 524, 536, 540, 556, 575, 587, 590, 596 .word 782, 795, 807, 812, 827, 847, 867, 879, 888, 894 .word 1912, 2925, 3927, 4932, 5447, 5957, 6967, 7979, 7988, 1994 tAreas: .space 280 len: .word 70 taMin: .word 0 taMid: .word 0 taMax: .word 0 taSum: .word 0 taAve: .word 0 Note, the .space 280 directive reserves 280 bytes which will store 70 words.

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