projects / vvhitespace / blame
| Commit | Line | Data |
|---|---|---|
| 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: | |
| 7 | @ startaddr -> startaddr+numbytes | |
| 8 | @ Call Stack: | |
| 9 | @ pattern | |
| 10 | @ startaddr | |
| 11 | @ numbytes <-- TOS | |
| 12 | @ Return Stack: | |
| 13 | @ <empty> | |
| 14 | @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | |
| 15 | NSSVTTSSSN | Mark: 11000 (memset) | |
| 16 | ||
| 17 | @ Prepare the stack for computation. | |
| 18 | @ Addr | Contents | |
| 19 | @ 0 | numbytes | |
| 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 | ||
| 44 | @ Decrement and check for loop end condition numbytes == 0. | |
| 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 | ||
| 61 | #endif |