zxq5
3afeafc9d4
- basic pointers and reading values from pointers works - writing to pointers not yet implemented (looks painful so a problem for tomorrow) - updated print library. the compiler has this hardcoded in all programs for now
38 lines
706 B
Plaintext
38 lines
706 B
Plaintext
dw global_arena_start: 0x30000
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dw global_arena_current: 0x30000
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dw global_arena_end: 0x40000
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arena_alloc:
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// Just like bump allocator
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push bpr
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mov spr, bpr
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ldw bpr, rg0, 8 // size argument
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ldw global_arena_current, rg1
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add rg1, rg0, rg2 // new_current = current + size
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ldw global_arena_end, rg3
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cmp rg2, rg3
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jgt out_of_memory
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stw rg2, global_arena_current
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mov rg1, acc // return old current
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stw acc, bpr, 8
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mov bpr, spr
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pop bpr
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return
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arena_reset:
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// Reset to start
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push bpr
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mov spr, bpr
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ldw global_arena_start, rg0
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stw rg0, global_arena_current
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mov bpr, spr
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pop bpr
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return
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