Appendix C: A Simple Machine Language
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© 2007 Pearson Addison-Wesley. All rights reserved 0-1 Appendix C: A Simple Machine Language Op-code Operand Description 1 RXY LOAD reg. R from cell XY. 2 RXY LOAD reg. R with XY. 3 RXY STORE reg. R at XY. 4 0RS MOVE R to S. 5 RST ADD S and T into R. (2’s comp.) 6 RST ADD S and T into R. (floating pt.) 7 RST OR S and T into R. 8 RST AND S and T into R. 9 RST XOR S and T into R. A R0X ROTATE reg. R X times. B RXY JUMP to XY if R = reg. 0. C 000 HALT.
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Appendix C: A Simple Machine Language. Op-code Operand Description 1RXYLOAD reg. R from cell XY. 2RXYLOAD reg. R with XY. 3RXYSTORE reg. R at XY. 40RSMOVE R to S. 5RSTADD S and T into R. (2’s comp.) 6RSTADD S and T into R. (floating pt.) - PowerPoint PPT Presentation
Transcript of Appendix C: A Simple Machine Language
© 2007 Pearson Addison-Wesley. All rights reserved 0-1
Appendix C: A Simple Machine Language
Op-code Operand Description
1 RXY LOAD reg. R from cell XY.
2 RXY LOAD reg. R with XY.
3 RXY STORE reg. R at XY.
4 0RS MOVE R to S.
5 RST ADD S and T into R. (2’s comp.)
6 RST ADD S and T into R. (floating pt.) 7 RST OR S and T into R. 8 RST AND S and T into R. 9 RST XOR S and T into R. A R0X ROTATE reg. R X times. B RXY JUMP to XY if R = reg. 0. C 000 HALT.
© 2007 Pearson Addison-Wesley. All rights reserved 0-2
A Simple Machine Language
Op-code Operand Description
1 RXY LOAD reg. R from cell XY.
2 RXY LOAD reg. R with XY.
3 RXY STORE reg. R at XY.
4 0RS MOVE R to S.
5 NXY STORE 0N to cell XY
6 RST ADD S and T into R.
7 RST SUB S and T into R. 8 RST OR S and T into R. 9 0ST LOAD reg. S from cell pointed by T. A RST XOR S and T into R. B R0X ROTATE reg. R X times. C 0XY JUMP to XY. D RXY JUMP to XY if R = reg. 0. E RXY JUMP to XY if R > 0. F 000 HALT.
