package j1 import ( "fmt" "testing" ) func cmp(t *testing.T, got, want Core) { t.Helper() if got.pc != want.pc { t.Errorf("pc: got %0.4X, want %0.4X", got.pc, want.pc) } if got.st0 != want.st0 { t.Errorf("st0: got %0.4X, want %0.4X", got.st0, want.st0) } if got.d.sp != want.d.sp { t.Errorf("dsp: got %0.4X, want %0.4X", got.d.sp, want.d.sp) } if got.r.sp != want.r.sp { t.Errorf("rsp: got %0.4X, want %0.4X", got.r.sp, want.r.sp) } if got.d.data != want.d.data { t.Errorf("dstack: got %0.4X, want %0.4X", got.d.data, want.d.data) } if got.r.data != want.r.data { t.Errorf("rstack: got %0.4X, want %0.4X", got.r.data, want.r.data) } } type mocConsole struct{} func (m *mocConsole) Read() uint16 { return 0 } func (m *mocConsole) Write(uint16) {} func (m *mocConsole) Len() uint16 { return 0 } func TestEval(t *testing.T) { testCases := []struct { ins []Instruction end Core }{ { ins: []Instruction{Jump(0xff)}, end: Core{pc: 0xff}, }, { ins: []Instruction{Literal(1), Conditional(0xff)}, end: Core{pc: 2}, }, { ins: []Instruction{Literal(0), Conditional(0xff)}, end: Core{pc: 0xff}, }, { ins: []Instruction{Call(0xff)}, end: Core{pc: 0xff, r: stack{data: [0x20]uint16{0x00, 0x02}, sp: 1}}, }, { ins: []Instruction{Literal(0xff)}, end: Core{pc: 1, st0: 0xff, d: stack{sp: 1}}, }, { ins: []Instruction{Literal(0xff), Literal(0xfe)}, end: Core{pc: 2, st0: 0xfe, d: stack{data: [0x20]uint16{0x00, 0x00, 0xff}, sp: 2}}, }, { // dup ins: []Instruction{Literal(0xff), ALU{Opcode: opT, TtoN: true, Ddir: 1}}, end: Core{pc: 2, st0: 0xff, d: stack{data: [0x20]uint16{0x00, 0x00, 0xff}, sp: 2}}, }, { // over ins: []Instruction{Literal(0xaa), Literal(0xbb), ALU{Opcode: opN, TtoN: true, Ddir: 1}}, end: Core{pc: 3, st0: 0xaa, d: stack{data: [0x20]uint16{0x00, 0x00, 0xaa, 0xbb}, sp: 3}}, }, { // invert ins: []Instruction{Literal(0x00ff), ALU{Opcode: opNotT}}, end: Core{pc: 2, st0: 0xff00, d: stack{sp: 1}}, }, { // + ins: []Instruction{Literal(1), Literal(2), ALU{Opcode: opTplusN, Ddir: -1}}, end: Core{pc: 3, st0: 3, d: stack{data: [0x20]uint16{0, 0, 1}, sp: 1}}, }, { // swap ins: []Instruction{Literal(2), Literal(3), ALU{Opcode: opN, TtoN: true}}, end: Core{pc: 3, st0: 2, d: stack{data: [0x20]uint16{0, 0, 3}, sp: 2}}, }, { // nip ins: []Instruction{Literal(2), Literal(3), ALU{Opcode: opT, Ddir: -1}}, end: Core{pc: 3, st0: 3, d: stack{data: [0x20]uint16{0, 0, 2}, sp: 1}}, }, { // drop ins: []Instruction{Literal(2), Literal(3), ALU{Opcode: opN, Ddir: -1}}, end: Core{pc: 3, st0: 2, d: stack{data: [0x20]uint16{0, 0, 2}, sp: 1}}, }, { // ; ins: []Instruction{Call(10), Call(20), ALU{Opcode: opT, RtoPC: true, Rdir: -1}}, end: Core{pc: 11, r: stack{data: [0x20]uint16{0, 2, 22}, sp: 1}}, }, { // >r ins: []Instruction{Literal(10), ALU{Opcode: opN, TtoR: true, Ddir: -1, Rdir: 1}}, end: Core{pc: 2, r: stack{data: [0x20]uint16{0, 10}, sp: 1}}, }, { // r> ins: []Instruction{Literal(10), Call(20), ALU{Opcode: opR, TtoN: true, TtoR: true, Ddir: 1, Rdir: -1}}, end: Core{pc: 21, st0: 4, d: stack{data: [0x20]uint16{0, 0, 10}, sp: 2}, r: stack{data: [0x20]uint16{10, 4}}}, }, { // r@ ins: []Instruction{Literal(10), ALU{Opcode: opR, TtoN: true, TtoR: true, Ddir: 1}}, end: Core{pc: 2, d: stack{data: [0x20]uint16{0, 0, 10}, sp: 2}, r: stack{data: [0x20]uint16{10}}}, }, { // @ ins: []Instruction{ALU{Opcode: opAtT}}, end: Core{pc: 1}, }, { // ! ins: []Instruction{Literal(1), Literal(0), ALU{Opcode: opN, NtoAtT: true, Ddir: -1}}, end: Core{pc: 3, st0: 1, d: stack{data: [0x20]uint16{0, 0, 1}, sp: 1}, memory: [0x2000]uint16{1}}, }, } for _, tc := range testCases { t.Run(fmt.Sprint(tc.ins), func(t *testing.T) { state := New(&mocConsole{}) for _, ins := range tc.ins { state.Execute(ins) } cmp(t, *state, tc.end) }) } } func TestNextST0(t *testing.T) { testCases := []struct { ins ALU st0 uint16 state Core }{ {ins: ALU{Opcode: opT}, st0: 0xff, state: Core{st0: 0xff}}, {ins: ALU{Opcode: opN}, st0: 0xbb, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opTplusN}, st0: 0x01ba, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opTandN}, st0: 0xbb, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opTorN}, st0: 0xff, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opTxorN}, st0: 0x44, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opNotT}, st0: 0xff55, state: Core{st0: 0xaa}}, {ins: ALU{Opcode: opNeqT}, st0: 0x00, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opNeqT}, st0: 0xffff, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xff}, sp: 2}}}, {ins: ALU{Opcode: opNleT}, st0: 0xffff, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opNleT}, st0: 0x00, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xff}, sp: 2}}}, {ins: ALU{Opcode: opNrshiftT}, st0: 0x3f, state: Core{st0: 0x02, d: stack{data: [0x20]uint16{0, 0xaa, 0xff}, sp: 2}}}, {ins: ALU{Opcode: opTminus1}, st0: 0x54, state: Core{st0: 0x55}}, {ins: ALU{Opcode: opR}, st0: 0x5, state: Core{r: stack{data: [0x20]uint16{0, 0x05}, sp: 1}}}, {ins: ALU{Opcode: opAtT}, st0: 0x5, state: Core{st0: 0x02, memory: [0x2000]uint16{0, 5, 10}}}, {ins: ALU{Opcode: opNlshiftT}, st0: 0x3fc, state: Core{st0: 0x02, d: stack{data: [0x20]uint16{0, 0xaa, 0xff}, sp: 2}}}, {ins: ALU{Opcode: opDepth}, st0: 0x305, state: Core{r: stack{sp: 3}, d: stack{sp: 5}}}, {ins: ALU{Opcode: opNuleT}, st0: 0xffff, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xbb}, sp: 2}}}, {ins: ALU{Opcode: opNuleT}, st0: 0x00, state: Core{st0: 0xff, d: stack{data: [0x20]uint16{0, 0xaa, 0xff}, sp: 2}}}, } for _, tc := range testCases { t.Run(fmt.Sprint(tc.ins), func(t *testing.T) { state := &tc.state st0 := state.newST0(tc.ins.Opcode) if st0 != tc.st0 { t.Errorf("got %x, want %x", st0, tc.st0) } }) } } func TestLoadBytes(t *testing.T) { data := []byte{1, 2, 4, 8} j1 := New(&mocConsole{}) if err := j1.LoadBytes(data); err != nil { t.Fatal(err) } expect := [0x2000]uint16{0x0201, 0x0804} if j1.memory != expect { t.Errorf("got %v, want %v", j1.memory[:2], expect) } } func TestReset(t *testing.T) { j1 := &Core{pc: 100, d: stack{sp: 2}, r: stack{sp: 3}, st0: 5} j1.Reset() if j1.pc != 0 || j1.d.sp != 0 || j1.r.sp != 0 || j1.st0 != 0 { t.Errorf("got %v", j1) } }