func (e *Emitter) addInstr(fn *bytecode.Fn, op bytecode.Opcode, flg bytecode.Flag, ix uint64) {
if e.err != nil {
return
}
switch op {
case bytecode.OP_PUSH:
e.stackSz[fn] += 1
case bytecode.OP_NEW:
e.stackSz[fn] += (1 - (2 * int64(ix)))
case bytecode.OP_POP, bytecode.OP_RET, bytecode.OP_UNM, bytecode.OP_NOT, bytecode.OP_TEST,
bytecode.OP_LT, bytecode.OP_LTE, bytecode.OP_GT, bytecode.OP_GTE, bytecode.OP_EQ,
bytecode.OP_ADD, bytecode.OP_SUB, bytecode.OP_MUL,
bytecode.OP_DIV, bytecode.OP_MOD, bytecode.OP_GFLD, bytecode.OP_NEQ:
e.stackSz[fn] -= 1
case bytecode.OP_SFLD:
e.stackSz[fn] -= 3
case bytecode.OP_CALL:
e.stackSz[fn] -= (int64(ix) + 1)
case bytecode.OP_CFLD:
e.stackSz[fn] -= (int64(ix) + 2)
}
if e.stackSz[fn] > fn.Header.StackSz {
fn.Header.StackSz = e.stackSz[fn]
}
fn.Is = append(fn.Is, bytecode.NewInstr(op, flg, ix))
}
func (a *Asm) readIs(fn *bytecode.Fn) {
var l string
var ok bool
// While a new F section is not reached
for l, ok = a.getLine(false); ok && l != "[f]"; l, ok = a.getLine(false) {
// Split in three parts
parts := strings.SplitN(l, " ", 3)
if a.assertIParts(parts) {
var ix uint64
o := bytecode.NewOpcode(parts[0])
f := bytecode.NewFlag(parts[1])
ix, a.err = strconv.ParseUint(parts[2], 10, 64)
fn.Is = append(fn.Is, bytecode.NewInstr(o, f, ix))
}
}
if ok {
a.readFn()
}
}
exp: &bytecode.File{
Fns: []*bytecode.Fn{
&bytecode.Fn{
// := emits Second before First, so literal is K0
Ks: []*bytecode.K{
&bytecode.K{
Type: bytecode.KtInteger,
Val: int64(5),
},
&bytecode.K{
Type: bytecode.KtString,
Val: "a",
},
},
Is: []bytecode.Instr{
bytecode.NewInstr(bytecode.OP_PUSH, bytecode.FLG_K, 0),
bytecode.NewInstr(bytecode.OP_POP, bytecode.FLG_V, 1),
},
},
},
},
},
1: {
// return nil
src: []*parser.Symbol{
&parser.Symbol{Id: "return", Ar: parser.ArStatement, First: &parser.Symbol{Id: "nil", Ar: parser.ArName, Val: nil}},
},
exp: &bytecode.File{
Fns: []*bytecode.Fn{
&bytecode.Fn{
Is: []bytecode.Instr{
func (e *Emitter) updateJumpfInstr(fn *bytecode.Fn, ix int) {
fn.Is[ix] = bytecode.NewInstr(bytecode.OP_JMP, bytecode.FLG_Jf, uint64(len(fn.Is)-ix-1))
}
func (e *Emitter) updateTestInstr(fn *bytecode.Fn, ix int) {
fn.Is[ix] = bytecode.NewInstr(bytecode.OP_TEST, bytecode.FLG_Jf, uint64(len(fn.Is)-ix-1))
}
i5
[l]
[i]
PUSH K 1 // Push constant value 5 on the stack
POP V 0 // Pop the value from the stack into variable identified by constant 0 (a)
PUSH V 0 // Push value of variable identified by constant 0 on the stack (a)
DUMP S 1
RET _ 0
`,
exp: AppendAny(SigVer(bytecode.Version()), Int64ToByteSlice(4), 't', 'e', 's', 't',
// StackSz - ExpArgs - ParentFnIx - LineStart - LineEnd
Int64ToByteSlice(1), ExpZeroInt64, ExpZeroInt64, ExpZeroInt64, Int64ToByteSlice(2),
// Ks - Ls - Is
Int64ToByteSlice(2), 's', Int64ToByteSlice(1), 'a', 'i', Int64ToByteSlice(5), ExpZeroInt64, Int64ToByteSlice(5),
// 5 ops
UInt64ToByteSlice(uint64(bytecode.NewInstr(bytecode.NewOpcode("PUSH"), bytecode.NewFlag("K"), 1))),
UInt64ToByteSlice(uint64(bytecode.NewInstr(bytecode.NewOpcode("POP"), bytecode.NewFlag("V"), 0))),
UInt64ToByteSlice(uint64(bytecode.NewInstr(bytecode.NewOpcode("PUSH"), bytecode.NewFlag("V"), 0))),
UInt64ToByteSlice(uint64(bytecode.NewInstr(bytecode.NewOpcode("DUMP"), bytecode.NewFlag("S"), 1))),
UInt64ToByteSlice(uint64(bytecode.NewInstr(bytecode.NewOpcode("RET"), bytecode.NewFlag("_"), 0))),
),
},
3: {
// Unknown opcode
id: "test",
src: `
[f]
test
1
0
0