core/vm: added JIT segmenting / optimisations

* multi-push segments
* static jumps segments

core/vm/opcodes.go

@@ -23,6 +23,18 @@ import (
 // OpCode is an EVM opcode
 type OpCode byte
 
+func (op OpCode) IsPush() bool {
+	switch op {
+	case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
+		return true
+	}
+	return false
+}
+
+func (op OpCode) IsStaticJump() bool {
+	return op == JUMP
+}
+
 const (
 	// 0x0 range - arithmetic ops
 	STOP OpCode = iota