Added folder for evm files

evm/tables.go

@@ -0,0 +1,38 @@
+package evm
+
+// Instruction is a function type that takes an Interpreter and a generic type H.
+type Instruction[H any] func(interpreter *Interpreter, h *H)
+
+// InstructionTable is a list of 256 instructions mapped to EVM opcodes.
+type InstructionTable[H any] [256]Instruction[H]
+
+// DynInstruction is a function type signature for dynamic instructions.
+type DynInstruction[H any] func(interpreter *Interpreter, h *H)
+
+// BoxedInstruction wraps a DynInstruction in a pointer, enabling dynamic dispatch.
+type BoxedInstruction[H any] *DynInstruction[H]
+
+// BoxedInstructionTable is an array of 256 boxed instructions.
+type BoxedInstructionTable[H any] [256]BoxedInstruction[H]
+
+const (
+	PlainTableMode = iota
+	BoxedTableMode
+)
+
+type InstructionTables[H any] struct {
+	PlainTable *InstructionTable[H]
+	BoxedTable *BoxedInstructionTable[H]
+	Mode       int // Indicates which table is in use (Plain or Boxed)
+}
+
+// Mode contains 0 and 1
+// NewPlainInstructionTable creates an InstructionTables instance with a PlainTable.
+func NewPlainInstructionTable[H any](table InstructionTable[H]) InstructionTables[H] {
+	return InstructionTables[H]{PlainTable: &table, Mode: PlainTableMode}
+}
+
+// NewBoxedInstructionTable creates an InstructionTables instance with a BoxedTable.
+func NewBoxedInstructionTable[H any](table BoxedInstructionTable[H]) InstructionTables[H] {
+	return InstructionTables[H]{BoxedTable: &table, Mode: BoxedTableMode}
+}