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vm: implement NOTEQUAL opcode

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This commit is contained in:
Evgenii Stratonikov 2020-04-30 10:52:29 +03:00
parent 70f0c656b0
commit 9081211f12
4 changed files with 27 additions and 9 deletions
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3
pkg/compiler/codegen.go
View file

@ -616,8 +616,7 @@ func (c *codegen) Visit(node ast.Node) ast.Visitor {
case n.Op == token.NEQ:
// VM has separate opcodes for number and string equality
if isStringType(c.typeInfo.Types[n.X].Type) {
emit.Opcode(c.prog.BinWriter, opcode.EQUAL)
emit.Opcode(c.prog.BinWriter, opcode.NOT)
emit.Opcode(c.prog.BinWriter, opcode.NOTEQUAL)
} else {
emit.Opcode(c.prog.BinWriter, opcode.NUMNOTEQUAL)
}

1
pkg/vm/opcode/opcode.go
View file

@ -103,6 +103,7 @@ const (
OR Opcode = 0x92
XOR Opcode = 0x93
EQUAL Opcode = 0x97
NOTEQUAL Opcode = 0x98
// Arithmetic
SIGN Opcode = 0x99

4
pkg/vm/vm.go
View file

@ -748,7 +748,7 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
a := v.estack.Pop().BigInt()
v.estack.PushVal(new(big.Int).Xor(b, a))
case opcode.EQUAL:
case opcode.EQUAL, opcode.NOTEQUAL:
b := v.estack.Pop()
if b == nil {
panic("no top-level element found")
@ -757,7 +757,7 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
if a == nil {
panic("no second-to-the-top element found")
}
v.estack.PushVal(a.value.Equals(b.value))
v.estack.PushVal(a.value.Equals(b.value) == (op == opcode.EQUAL))
// Numeric operations.
case opcode.SIGN:

18
pkg/vm/vm_test.go
View file

@ -1319,6 +1319,24 @@ func TestEQUALMapFalse(t *testing.T) {
assert.Equal(t, &BoolItem{false}, vm.estack.Pop().value)
}
func getTestFuncForVM(prog []byte, result interface{}, args ...interface{}) func(t *testing.T) {
return func(t *testing.T) {
v := load(prog)
for i := range args {
v.estack.PushVal(args[i])
}
runVM(t, v)
require.Equal(t, 1, v.estack.Len())
require.Equal(t, makeStackItem(result), v.estack.Pop().value)
}
}
func TestNOTEQUALByteArray(t *testing.T) {
prog := makeProgram(opcode.NOTEQUAL)
t.Run("True", getTestFuncForVM(prog, true, []byte{1, 2}, []byte{0, 1, 2}))
t.Run("False", getTestFuncForVM(prog, false, []byte{1, 2}, []byte{1, 2}))
}
func TestNumEqual(t *testing.T) {
prog := makeProgram(opcode.NUMEQUAL)
vm := load(prog)