diff options
Diffstat (limited to 'vm/vm.go')
| -rw-r--r-- | vm/vm.go | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -16,6 +16,7 @@ const ( Add // n1 n2 -- sum ; sum = n1+n2 Assign // val -- ; mem[$1] = val Fassign // val -- ; mem[$1] = val + Vassign // val dest -- ; dest.Set(val) Call // f [a1 .. ai] -- [r1 .. rj] ; r1, ... = prog[f](a1, ...) Calli // f [a1 .. ai] -- [r1 .. rj] ; r1, ... = prog[f](a1, ...) CallX // f [a1 .. ai] -- [r1 .. rj] ; r1, ... = mem[f](a1, ...) @@ -24,6 +25,7 @@ const ( Equal // n1 n2 -- cond ; cond = n1 == n2 EqualSet // n1 n2 -- n1 cond ; cond = n1 == n2 Exit // -- ; + Field // s -- f ; f = s.FieldIndex($1, ...) Greater // n1 n2 -- cond; cond = n1 > n2 Grow // -- ; sp += $1 Jump // -- ; ip += $1 @@ -54,6 +56,7 @@ var strop = [...]string{ // for VM tracing. Exit: "Exit", Fassign: "Fassign", Fdup: "Fdup", + Field: "Field", Greater: "Greater", Grow: "Grow", Jump: "Jump", @@ -69,6 +72,7 @@ var strop = [...]string{ // for VM tracing. Return: "Return", Sub: "Sub", Subi: "Subi", + Vassign: "Vassign", } type Code [][]int64 @@ -161,6 +165,8 @@ func (m *Machine) Run() (err error) { return err case Fdup: mem = append(mem, mem[int(op[2])+fp-1]) + case Field: + mem[sp-1] = mem[sp-1].(reflect.Value).FieldByIndex(slint(op[2:])) case Jump: ip += int(op[2]) continue @@ -219,6 +225,9 @@ func (m *Machine) Run() (err error) { mem = mem[:sp-1] case Subi: mem[sp-1] = mem[sp-1].(int) - int(op[2]) + case Vassign: + mem[sp-1].(reflect.Value).Set(reflect.ValueOf(mem[sp-2])) + mem = mem[:sp-2] } ip++ } @@ -265,3 +274,11 @@ func Disassemble(code [][]int64) (asm string) { } return asm } + +func slint(a []int64) []int { + r := make([]int, len(a)) + for i, v := range a { + r[i] = int(v) + } + return r +} |