96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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decoderp.h
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Abstract:
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Private exports, defines for CPU Instruction decoder
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Author:
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27-Jun-1995 BarryBo, Created
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Revision History:
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--*/
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#ifndef DECODERP_H
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#define DECODERP_H
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#define GET_BYTE(addr) (*(UNALIGNED unsigned char *)(addr))
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#define GET_SHORT(addr) (*(UNALIGNED unsigned short *)(addr))
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#define GET_LONG(addr) (*(UNALIGNED unsigned long *)(addr))
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/*---------------------------------------------------------------------*/
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typedef struct _DecoderState {
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DWORD InstructionAddress;
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INT RepPrefix;
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BOOL AdrPrefix;
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OPERATION OperationOverride;
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} DECODERSTATE, *PDECODERSTATE;
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#define eipTemp State->InstructionAddress
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#define DISPATCH(x) void x(PDECODERSTATE State, PINSTRUCTION Instr)
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#if DBG
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#define UNIMPL_INSTR(name) { \
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OutputDebugString("CPU: Warning: unimplemented instruction " ## name ## " encountered\r\n"); \
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BAD_INSTR; \
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}
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#else
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#define UNIMPL_INSTR BAD_INSTR
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#endif
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#define BAD_INSTR \
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State->OperationOverride = OP_BadInstruction;
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#define PRIVILEGED_INSTR \
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State->OperationOverride = OP_PrivilegedInstruction;
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#define get_reg32(cpu) \
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(GP_EAX + (((*(PBYTE)(eipTemp+1)) >> 3) & 0x07))
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#define get_reg16(cpu) \
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(GP_AX + (((*(PBYTE)(eipTemp+1)) >> 3) & 0x07))
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#define DEREF8(Op) \
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CPUASSERT(Op.Type == OPND_REGREF || Op.Type == OPND_ADDRREF); \
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Op.Type = (Op.Type == OPND_REGREF) ? OPND_REGVALUE : OPND_ADDRVALUE8;
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#define DEREF16(Op) \
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CPUASSERT(Op.Type == OPND_REGREF || Op.Type == OPND_ADDRREF); \
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Op.Type = (Op.Type == OPND_REGREF) ? OPND_REGVALUE : OPND_ADDRVALUE16;
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#define DEREF32(Op) \
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CPUASSERT(Op.Type == OPND_REGREF || Op.Type == OPND_ADDRREF); \
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Op.Type++;
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int scaled_index(PBYTE pmodrm, POPERAND op);
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void get_segreg(PDECODERSTATE State, POPERAND op);
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int mod_rm_reg32(PDECODERSTATE State, POPERAND op1, POPERAND op2);
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int mod_rm_reg16(PDECODERSTATE State, POPERAND op1, POPERAND op2);
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int mod_rm_reg8 (PDECODERSTATE State, POPERAND op1, POPERAND op2);
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#define PREFIX_NONE 0
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#define PREFIX_REPZ 1
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#define PREFIX_REPNZ 2
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typedef void (*pfnDispatchInstruction)(PDECODERSTATE, PINSTRUCTION);
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extern pfnDispatchInstruction Dispatch32[256];
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extern pfnDispatchInstruction Dispatch232[256];
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extern pfnDispatchInstruction Dispatch16[256];
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extern pfnDispatchInstruction Dispatch216[256];
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extern pfnDispatchInstruction LockDispatch32[256];
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extern pfnDispatchInstruction LockDispatch232[256];
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extern pfnDispatchInstruction LockDispatch16[256];
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extern pfnDispatchInstruction LockDispatch216[256];
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#endif //DECODERP_H
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