Ukeoppgave 5. november 2009


Oppgave 1
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Her er fem forsøk på å oversette enkle tilordninger fra RusC 
til Rask-kode. Alle er gale! Finn ut hva som er galt og hva 
Rask-koden skulle ha vært.

1a   v1 = -17;

Code   12: -201000000000017  SET       1  0        -17  #      -17
Code   13:  301000000000005  STORE     1  0          5  # v1 = 

1b   v2 = v1 - 1;

Code   15:  101000000000005  LOAD      1  0          5  # R1 = v1
Code   16:  501030000000001  SUB       1  1          1  # R1 = R1-1
Code   17:  301000000000006  STORE     1  0          6  # v2 = R1

1c   v3 = v1*-2;

Code   21:  101000000000005  LOAD      1  0          5  # R1 = v1
Code   22:  201000000000002  SET       1  0          2  #       2
Code   23:  501000000000001  SUB       1  0          1  # R1 = -
Code   24:  601030000000001  MUL       1  3          1  # *
Code   25:  301000000000007  STORE     1  0          7  # v3 = 

1d   v4 = 2*v2 + 2;

Code   26:  201000000000002  SET       1  0          2  # R1 = 2
Code   27:  203010000000000  SET       3  1          0  # <save operand>
Code   28:  101000000000006  LOAD      1  0          6  # R1 = v2
Code   29:  601030000000001  MUL       1  3          1  # *
Code   30:  203010000000000  SET       3  1          0  # <save operand>
Code   31:  201000000000002  SET       1  0          2  # R1 = 2
Code   32:  401030000000001  ADD       1  3          1  # +

1e   v5 = v1*3 - v2*2;

Code   34:  101000000000005  LOAD      1  0          5  # R1 = v1
Code   35:  203010000000000  SET       3  1          0  # <save operand>
Code   36:  201000000000003  SET       1  0          3  # R1 = 3
Code   37:  601030000000001  MUL       1  3          1  # *
Code   38:  203010000000000  SET       3  1          0  # <save operand>
Code   39:  101000000000006  LOAD      1  0          6  # R1 = v2
Code   40:  204010000000000  SET       4  1          0  # <save operand>
Code   41:  201000000000002  SET       1  0          2  # R1 = 2
Code   42:  601040000000001  MUL       1  4          1  # *
Code   43:  501030000000001  SUB       1  3          1  # -
Code   44:  301000000000009  STORE     1  0          9  # v5 = 


Oppgave 2
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Skriv ferdig metodene noteCode, noteRes og noteUpdate i Log-modulen.