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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// Common headers used both in smgen.exe and the JIT.
//
#ifndef __sm_common_h__
#define __sm_common_h__
#include "smopenum.h"
#define NUM_SM_STATES 250
typedef BYTE SM_STATE_ID;
static_assert_no_msg(sizeof(SM_STATE_ID) == 1); // To conserve memory, we don't want to have more than 256 states.
#define SM_STATE_ID_START 1
static_assert_no_msg(SM_STATE_ID_START == 1); // Make sure nobody changes it. We rely on this to map the SM_OPCODE
// to single-opcode states. For example, in GetWeightForOpcode().
struct JumpTableCell
{
SM_STATE_ID srcState;
SM_STATE_ID destState;
};
struct SMState
{
bool term; // does this state terminate a code sequence?
BYTE length; // the length of currently matched opcodes
SM_STATE_ID longestTermState; // the ID of the longest matched terminate state
SM_STATE_ID prevState; // previous state
SM_OPCODE opc; // opcode that leads from the previous state to current state
unsigned short jumpTableByteOffset;
};
//
// Code sequences
//
#define MAX_CODE_SEQUENCE_LENGTH 7
#define CODE_SEQUENCE_END ((SM_OPCODE)(SM_COUNT + 1))
#endif /* __sm_common_h__ */
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