bird-vm/design.md

Op Layout

The first three bits are the category, the next four are the op, the last one is whether or not the op should operate on two bytes (1 for 2byte/16bit, 0 for 1byte/8bit)

[ 000  0000  0 ]
   |    \/   |
  Cat   Op 2byte

1. memory - 000
2. set - 000
3. get - 001
4. sei - 010 - set indirect (use a pointer stores elswhere)
5. gei - 011
6. .
7. .
8. .
9. stack - 001
10. psh - 000
11. pop - 001
12. ovr - 010
13. swp - 011
14. rot - 100
15. dup - 101
16. .
17. math - 010
18. add - 000
19. sub - 001
20. mul - 010
21. div - 011
22. inc - 100
23. dec - 101
24. .
25. bits - 011
26. and - 000
27. bor - 001 (bitwise or)
28. xor - 010
29. not - 011
30. shr - 100
31. shl - 101
32. eql - 111
33. jump - 100
34. jmp - 000
35. sub - 001
36. jcd - 010
37. ret - 011
38. .
39. .
40. .
41. sys - 101
42. gch - 000
43. gst - 001
44. pch - 010
45. pst - 011
46. hlt - 100
47. .
48. .
49. .
50. .
51. .
52. .
53. .
54. .
55. .
56. .
57. .
58. .
59. .
60. .
61. .
62. .
63. .
64. .
65. .
66. .
67. .
68. .
69. .
70. dev - 111
71. .
72. .
73. .
74. .
75. .
76. .
77. .
78. .
79. .
80. .
81. .
82. .
83. .
84. .
85. .
86. .
87. .
88. .
89. .
90. .
91. .
92. .
93. .
94. .
95. .
96. .
97. .
98. .

Memory Layout

var memory = [MAX_uint16]byte{}

Stack