TABLE OF CONTENTS | 1. | Code fragment: do { i = i - k; } while (i < (j + k)); |
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| 2. | Code fragment: if (i && j) { k = k & 0xFF00; } |
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| 3. | Code fragment: k = i i; |
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| 4. | Code fragment: while (i != j) { k = k 1; j--; } |
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Answers
| 1. |
top movf k,w subwf i,f ; i LSB = i LSB - k LSB movf k+1,w subwfb i+1,f ; i MSB = i MSB - k MSB ; need to do [ i - (j+k)] for comparison, use ; temporary location, do j+k first movf j,w addwf k,w ; w = i LSB + k LSB movwf tmp ;save LSB to tmp LSB, a temporary location movf j+1,w addwfc k+1,w ;w = i LSB + k LSB movwf ... |
