mirror of https://github.com/egormanga/Slang.git
172 lines
2.9 KiB
Markdown
172 lines
2.9 KiB
Markdown
# Slang Bytecode
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## Standalone
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### NOP
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0x00
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> Does nothing.
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### END
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0x01
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> Closes previously opened block.
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### POP
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0x02
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> Drops `TOS`.
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### RET
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0x03
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> Returns `TOS` to caller.
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### BLTIN
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0x04
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> Reads string from the bytecode until null byte (max 255 bytes) and pushes builtin function with that name.
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### CODE
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0x05
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> Reads code from the bytecode until the corresponding `END` instruction and pushes a reference to it and then its length.
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> Opens a block.
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## Unary
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### POS
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0x10
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> Pushes `abs(TOS)`.
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### NEG
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0x11
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> Pushes `-TOS`.
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### NOT
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0x12
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> Pushes `!TOS`.
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### INV
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0x13
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> Pushes `~TOS`.
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### ATOI
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0x14
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> Pushes integer of smallest possible width parsed from string `TOS`.
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### ITOA
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0x15
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> Pushes string representation of integer `TOS`.
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### ITOF
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0x16
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> Pushes real of smallest possible width equal to integer `TOS`.
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### CEIL
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0x17
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> Pushes smallest integer of smallest possible width greater or equal to real `TOS`.
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### FLR
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0x18
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> Pushes largest integer of smallest possible width less or equal to real `TOS`.
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### RND
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0x19
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> Pushes integer of smallest possible width equal to rounded `TOS`.
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### CTOS
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0x1A
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> Pushes string consisting of char `TOS` and a null byte.
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## Binary
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### ADD
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0x20
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> Pushes `TOS1 + TOS`.
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### SUB
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0x21
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> Pushes `TOS1 - TOS`.
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### MUL
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0x22
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> Pushes `TOS1 * TOS`.
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### DIV
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0x23
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> Pushes `TOS1 / TOS`.
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### IDIV
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0x24
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> Pushes `TOS1 // TOS`.
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### MOD
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0x25
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> Pushes `TOS1 % TOS`.
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### POW
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0x26
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> Pushes `TOS1 ** TOS`.
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### LSH
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0x27
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> Pushes `TOS1 << TOS`.
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### RSH
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0x28
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> Pushes `TOS1 >> TOS`.
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### AND
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0x29
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> Pushes `TOS1 & TOS`.
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### OR
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0x2A
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> Pushes `TOS1 | TOS`.
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### XOR
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0x2B
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> Pushes `TOS1 ^ TOS`.
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## Comparisons
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### EQ
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0x30
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> Pushes `TOS1 == TOS`.
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### NE
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0x31
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> Pushes `TOS1 != TOS`.
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### LT
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0x32
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> Pushes `TOS1 < TOS`.
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### GT
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0x33
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> Pushes `TOS1 > TOS`.
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### LE
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0x34
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> Pushes `TOS1 <= TOS`.
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### GE
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0x35
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> Pushes `TOS1 >= TOS`.
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### IS
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0x36
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> Pushes `TOS1 is TOS`.
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### ISNOT
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0x37
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> Pushes `TOS1 is not TOS`.
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## Flow control
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### IF
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0x40
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> If `TOS` is false, skips bytecode until corresponding `ELSE` (if exists) or `END`.
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> Opens a block.
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### ELSE
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0x41
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> Pops last `IF` result from `IF`-stack, and if it is true, skips bytecode to corresponding `END`.
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> Opens a block.
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### EXEC
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0x42
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> Executes code block `TOS1` of length `TOS` and pushes the result.
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## With argument
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### ALLOC*(bytes)*
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0xA0
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> Pushes reference to `calloc(1, bytes)`.
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### EXTEND*(bytes)*
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0xA1
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> Extends integer `TOS` width to `bytes` bytes if narrower.
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### CONST*(bytes)*
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0xA2
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> Reads next `bytes` bytes of bytecode and pushes a reference to a copy of them.
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### JUMPF*(offset)*
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0xA3
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> Jumps `offset` bytes of bytecode forward.
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### JUMPB*(offset)*
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0xA4
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> Jumps `offset` bytes of bytecode backward.
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### SCPGET*(cell)*
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0xA5
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> Pushes the value of cell `cell` of local scope variables array.
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### SCPSET*(cell)*
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0xA6
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> Sets the value of cell `cell` of local scope variables array to `TOS`.
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### CALL*(nargs)*
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0xA7
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> Calls `TOS` with `nargs` arguments popped from stack (below the callable).
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