[CS61C FA20] Lecture 10.4 - RISC-V Procedures: Summary — Transcript

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1. 0:00[Music]
2. 0:10welcome back one final time to the risk
3. 0:125 assembly language module
4. 0:14in this module we it's not that we just
5. 0:18learned the
6. 0:18the risk 5 assembly language we actually
7. 0:21learned
8. 0:22basics of the risk 5 instruction set
9. 0:25architecture
10. 0:26we understand really at some level
11. 0:30how does there is five processor work we
12. 0:33understand its programmers model
13. 0:37we have learned a lot of these five
14. 0:39instructions um
15. 0:41we are missing only about seven or eight
16. 0:43about we have covered about 30
17. 0:44and the other ones we'll see are you
18. 0:47know
19. 0:48essentially relatives of these ones that
20. 0:50we have learned so far
21. 0:52we can with these three instructions
22. 0:55we can write pretty much
23. 0:59any assembly program that we need
24. 1:02the other ones are just going to make
25. 1:04that life a little bit easier
26. 1:07now like writing c programs
27. 1:10nobody has learned writing c just by
28. 1:13watching
29. 1:13the the instructional videos the way how
30. 1:17we learn
31. 1:17writing assembly language is by
32. 1:20practicing it so please go ahead and
33. 1:23practice it
34. 1:24it is less likely that we'll be writing
35. 1:28assembly um during our careers but
36. 1:31you'll be surprised how much assembly is
37. 1:33still being written out there
38. 1:36so spend some time and understand it
39. 1:40not just for the sake of understanding
40. 1:42learning how to program in assembly
41. 1:44but as a really good insight into how
42. 1:47does the computer actually work
43. 1:52when we presented
44. 1:55these assembly instructions we did them
45. 1:57in a particular order
46. 1:59we're going to see that in the next
47. 2:02module we're going to be
48. 2:03grouping them a bit differently and in
49. 2:06this list
50. 2:07we are showing a glimpse of that
51. 2:10so when we look at this grouping
52. 2:15i've organized register-based arithmetic
53. 2:18logic
54. 2:19instructions in one group and then
55. 2:22immediately
56. 2:23in another group do you see something
57. 2:25there that is similar
58. 2:27yeah the format is the same
59. 2:32that's telling us something a machine
60. 2:36that executes them is going to look at
61. 2:39them
62. 2:39at pretty much the same way
63. 2:42now we i put two more groups and we'll
64. 2:45find out that these may
65. 2:48not fit together the right way
66. 2:51loads and stores don't look the same
67. 2:55branches mostly do but these jumps
68. 2:58not quite
69. 3:02so we're going to see a little bit
70. 3:05of regrouping there and putting likes
71. 3:09with likes so this wraps up
72. 3:12the module on risk 5 assembly language
73. 3:16and the next big module is going to
74. 3:20cover
75. 3:21machine language we're going to descend
76. 3:23one more time
77. 3:24in the in our level of abstraction
78. 3:28and we're going to translate all of
79. 3:30these assembly instructions
80. 3:32into one a bunch of zeros and ones
81. 3:36we are not going to memorize those zeros
82. 3:38in once
83. 3:40but that is what the computer is going
84. 3:42to
85. 3:43see and execute so take a break now
86. 3:47and we'll see you in a bit in the next
87. 3:50module
88. 3:51that deals with the representation of
89. 3:53instructions
90. 3:54see you there