vm

package

v0.0.0-...-40ef3ae Latest Latest Go to latest Published: Aug 29, 2022 License: MIT Imports: 2 Imported by: 0

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Repository

codeberg.org/flowtr/luago

Links

Open Source Insights

Documentation ¶

Constants ¶

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const (
	IABC  = iota // [  B:9  ][  C:9  ][ A:8  ][OP:6]
	IABx         // [      Bx:18     ][ A:8  ][OP:6]
	IAsBx        // [     sBx:18     ][ A:8  ][OP:6]
	IAx          // [           Ax:26        ][OP:6]
)

OpMode basic instruction format

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const (
	OpArgN = iota // argument is not used
	OpArgU        // argument is used
	OpArgR        // argument is a register or a jump offset
	OpArgK        // argument is a constant or register/constant
)

OpArgMask

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const (
	OP_MOVE = iota
	OP_LOADK
	OP_LOADKX
	OP_LOADBOOL
	OP_LOADNIL
	OP_GETUPVAL
	OP_GETTABUP
	OP_GETTABLE
	OP_SETTABUP
	OP_SETUPVAL
	OP_SETTABLE
	OP_NEWTABLE
	OP_SELF
	OP_ADD
	OP_SUB
	OP_MUL
	OP_MOD
	OP_POW
	OP_DIV
	OP_IDIV
	OP_BAND
	OP_BOR
	OP_BXOR
	OP_SHL
	OP_SHR
	OP_UNM
	OP_BNOT
	OP_NOT
	OP_LEN
	OP_CONCAT
	OP_JMP
	OP_EQ
	OP_LT
	OP_LE
	OP_TEST
	OP_TESTSET
	OP_CALL
	OP_TAILCALL
	OP_RETURN
	OP_FORLOOP
	OP_FORPREP
	OP_TFORCALL
	OP_TFORLOOP
	OP_SETLIST
	OP_CLOSURE
	OP_VARARG
	OP_EXTRAARG
)

OpCode

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const LFIELDS_PER_FLUSH = 50

number of list items to accumulate before a SETLIST instruction

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const MAXARG_Bx = 1<<18 - 1 // 262143

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const MAXARG_sBx = MAXARG_Bx >> 1 // 131071

Variables ¶

This section is empty.

Functions ¶

func Fb2int ¶

func Fb2int(x int) int

converts back

func Int2fb ¶

func Int2fb(x int) int

** converts an integer to a "floating point byte", represented as ** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if ** eeeee != 0 and (xxx) otherwise.

Types ¶

type Instruction ¶

type Instruction uint32

31 22 13 5 0

+-------+^------+-^-----+-^-----
|b=9bits |c=9bits |a=8bits|op=6|
+-------+^------+-^-----+-^-----
|    bx=18bits    |a=8bits|op=6|
+-------+^------+-^-----+-^-----
|   sbx=18bits    |a=8bits|op=6|
+-------+^------+-^-----+-^-----
|    ax=26bits            |op=6|
+-------+^------+-^-----+-^-----

31 23 15 7 0

func (Instruction) ABC ¶

func (self Instruction) ABC() (a, b, c int)

func (Instruction) ABx ¶

func (self Instruction) ABx() (a, bx int)

func (Instruction) AsBx ¶

func (self Instruction) AsBx() (a, sbx int)

func (Instruction) Ax ¶

func (self Instruction) Ax() int

func (Instruction) BMode ¶

func (self Instruction) BMode() byte

func (Instruction) CMode ¶

func (self Instruction) CMode() byte

func (Instruction) Execute ¶

func (self Instruction) Execute(vm api.LuaVM)

func (Instruction) OpMode ¶

func (self Instruction) OpMode() byte

func (Instruction) OpName ¶

func (self Instruction) OpName() string

func (Instruction) Opcode ¶

func (self Instruction) Opcode() int

Source Files ¶

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