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3695b659 AT |
1 | #ifndef VVS_STDLIB_HEAP |
2 | #define VVS_STDLIB_HEAP | |
3 | ||
4 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
5 | @ Description: | |
6 | @ This function writes pattern into the memory locations: | |
3d75b928 | 7 | @ startaddr -> startaddr+count |
3695b659 AT |
8 | @ Call Stack: |
9 | @ pattern | |
10 | @ startaddr | |
3d75b928 | 11 | @ count <-- TOS |
3695b659 AT |
12 | @ Return Stack: |
13 | @ <empty> | |
14 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
15 | NSSVTTSSSN | Mark: 11000 (memset) | |
16 | ||
17 | @ Prepare the stack for computation. | |
18 | @ Addr | Contents | |
3d75b928 | 19 | @ 0 | count |
3695b659 AT |
20 | @ 1 | startaddr |
21 | @ 2 | pattern | |
22 | ||
23 | SSSSN | PUSH 0 (ptr) | |
24 | SNT | SWAP | |
25 | TTS | STORE | |
26 | SSSTN | PUSH 1 (ptr) | |
27 | SNT | SWAP | |
28 | TTS | STORE | |
29 | SSSTSN | PUSH 2 (ptr) | |
30 | SNT | SWAP | |
31 | TTS | STORE | |
32 | ||
33 | @ Store pattern into one memory location on each pass through this loop. | |
34 | NSSVSSSTTSSSSSSSSSSSN | Mark: 00011000 00000000 | |
35 | SSSSN | PUSH 0 (ptr) | |
36 | TTT | LOAD | |
37 | SSSTN | PUSH 1 (ptr) | |
38 | TTT | LOAD | |
39 | TSSS | ADD | |
40 | SSSTSN | PUSH 2 (ptr) | |
41 | TTT | LOAD | |
42 | TTS | STORE | |
43 | ||
3d75b928 | 44 | @ Decrement and check for loop end condition count == 0. |
3695b659 AT |
45 | SSSSN | PUSH 0 (ptr) |
46 | TTT | LOAD | |
47 | SNS | DUP | |
48 | NTSSSSTTSSSSSSSSSSTN | BRZ > 00011000 00000001 | |
49 | SSSTN | PUSH 1 | |
50 | TSST | SUBTRACT | |
51 | SSSSN | PUSH 0 (ptr) | |
52 | SNT | SWAP | |
53 | TTS | STORE | |
54 | NSNSSSTTSSSSSSSSSSSN | JMP > 00011000 00000000 | |
55 | ||
56 | @ Clean up and return | |
57 | NSSVSSSTTSSSSSSSSSSTN | Mark: 00011000 00000001 | |
58 | SNN | DROP | |
59 | NTN | RTS | |
60 | ||
3d75b928 AT |
61 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
62 | @ Description: | |
63 | @ This function copies count+1 words from source to destination. | |
64 | @ Call Stack: | |
65 | @ source | |
66 | @ destination | |
67 | @ count <-- TOS | |
68 | @ Return Stack: | |
69 | @ <empty> | |
70 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
71 | NSSVTTSSTN | Mark: 11001 (memcpy) | |
72 | ||
73 | @ Prepare the stack for computation. | |
74 | @ Addr | Contents | |
75 | @ 0 | count | |
76 | @ 1 | destination | |
77 | @ 2 | source | |
78 | ||
79 | SSSSN | PUSH 0 (ptr) | |
80 | SNT | SWAP | |
81 | TTS | STORE | |
82 | SSSTN | PUSH 1 (ptr) | |
83 | SNT | SWAP | |
84 | TTS | STORE | |
85 | SSSTSN | PUSH 2 (ptr) | |
86 | SNT | SWAP | |
87 | TTS | STORE | |
88 | ||
89 | @ Copy one word on each pass through this loop. | |
90 | NSSVSSSTTSSTSSSSSSSSN | Mark: 00011001 00000000 | |
91 | SSSTN | PUSH 1 (ptr) | |
92 | TTT | LOAD | |
93 | SSSSN | PUSH 0 (ptr) | |
94 | TTT | LOAD | |
95 | TSSS | ADD | |
96 | SSSTSN | PUSH 2 (ptr) | |
97 | TTT | LOAD | |
98 | SSSSN | PUSH 0 (ptr) | |
99 | TTT | LOAD | |
100 | TSSS | ADD | |
101 | TTT | LOAD | |
102 | TTS | STORE | |
103 | ||
104 | @ Decrement and check for loop end conditions. | |
105 | SSSSN | PUSH 0 (ptr) | |
106 | TTT | LOAD | |
107 | SNS | DUP | |
108 | NTSSSSTTSSTSSSSSSSTN | BRZ > 00011001 00000001 | |
109 | SSSTN | PUSH 1 | |
110 | TSST | SUBTRACT | |
111 | SSSSN | PUSH 0 (ptr) | |
112 | SNT | SWAP | |
113 | TTS | STORE | |
114 | NSNSSSTTSSTSSSSSSSSN | JMP > 00011001 00000000 | |
115 | ||
116 | @ Clean up and return | |
117 | NSSVSSSTTSSTSSSSSSSTN | Mark: 00011001 00000001 | |
118 | SNN | DROP | |
119 | NTN | RTS | |
120 | ||
3695b659 | 121 | #endif |