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-rw-r--r--core_test.go179
1 files changed, 179 insertions, 0 deletions
diff --git a/core_test.go b/core_test.go
new file mode 100644
index 0000000..12ae6f9
--- /dev/null
+++ b/core_test.go
@@ -0,0 +1,179 @@
+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("d:stack: 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)
+ }
+}
+
+func TestEval(t *testing.T) {
+ testCases := []struct {
+ ins []Instruction
+ end Core
+ }{
+ {
+ ins: []Instruction{Jump(0xff)},
+ end: Core{pc: 0xff},
+ },
+ {
+ ins: []Instruction{Lit(1), Cond(0xff)},
+ end: Core{pc: 2},
+ },
+ {
+ ins: []Instruction{Lit(0), Cond(0xff)},
+ end: Core{pc: 0xff},
+ },
+ {
+ ins: []Instruction{Call(0xff)},
+ end: Core{pc: 0xff, r: stack{data: [0x20]uint16{0x00, 0x02}, sp: 1}},
+ },
+ {
+ ins: []Instruction{Lit(0xff)},
+ end: Core{pc: 1, st0: 0xff, d: stack{sp: 1}},
+ },
+ {
+ ins: []Instruction{Lit(0xff), Lit(0xfe)},
+ end: Core{pc: 2, st0: 0xfe, d: stack{data: [0x20]uint16{0x00, 0x00, 0xff}, sp: 2}},
+ },
+ { // dup
+ ins: []Instruction{Lit(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{Lit(0xaa), Lit(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{Lit(0x00ff), ALU{Opcode: opNotT}},
+ end: Core{pc: 2, st0: 0xff00, d: stack{sp: 1}},
+ },
+ { // +
+ ins: []Instruction{Lit(1), Lit(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{Lit(2), Lit(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{Lit(2), Lit(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{Lit(2), Lit(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{Lit(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{Lit(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{Lit(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{Lit(1), Lit(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: [0x4000]uint16{1}},
+ },
+ }
+
+ for _, tc := range testCases {
+ t.Run(fmt.Sprint(tc.ins), func(t *testing.T) {
+ state := New()
+ for _, ins := range tc.ins {
+ state.Eval(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: [0x4000]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()
+ if err := j1.LoadBytes(data); err != nil {
+ t.Fatal(err)
+ }
+ expect := [0x4000]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)
+ }
+}