1 files changed, 63 insertions, 0 deletions
diff --git a/core/vm/sqlvm/runtime/instructions.go b/core/vm/sqlvm/runtime/instructions.go
new file mode 100644
index 000000000..f642a2515
--- /dev/null
+++ b/core/vm/sqlvm/runtime/instructions.go
@@ -0,0 +1,63 @@
+package runtime
+
+import (
+	"fmt"
+	"math/big"
+	"strings"
+
+	"github.com/dexon-foundation/dexon/core/vm/sqlvm/ast"
+	"github.com/dexon-foundation/dexon/core/vm/sqlvm/common"
+)
+
+var tupleJoin = "|"
+
+// OpFunction type
+// data could be fields Fields, pattern []byte, order Orders
+type OpFunction func(ctx *common.Context, ops []*Operand, registers []*Operand, output int) error
+
+// Instruction represents single instruction with essential information
+// collection.
+type Instruction struct {
+	op     OpCode
+	input  []*Operand
+	output int
+}
+
+// Raw with embedded big.Int value or byte slice which represents the real value
+// of basic operand unit.
+type Raw struct {
+	MajorType ast.DataTypeMajor
+	MinorType ast.DataTypeMinor
+
+	// for not bytes
+	Value    *big.Int
+	Max, Min *big.Int
+	// for bytes
+	Bytes []byte
+}
+
+func (r *Raw) String() string {
+	return fmt.Sprintf(
+		"MajorType: %v, MinorType: %v, Value: %v, Bytes: %v",
+		r.MajorType, r.MinorType, r.Value, r.Bytes)
+}
+
+// Tuple is collection of Raw.
+type Tuple []*Raw
+
+func (t Tuple) String() string {
+	rawStr := []string{}
+	for i := 0; i < len(t); i++ {
+		rawStr = append(rawStr, t[i].String())
+	}
+	return strings.Join(rawStr, tupleJoin)
+}
+
+// Operand would be array-based value associated with meta to describe type of
+// array element.
+type Operand struct {
+	IsImmediate   bool
+	Meta          []ast.DataType
+	Data          []Tuple
+	RegisterIndex *int
+}