pcsx2/common/include/x86emitter/implement/group2.h

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/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2010 PCSX2 Dev Team
*
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
namespace x86Emitter {
enum G2Type
{
G2Type_ROL=0,
G2Type_ROR,
G2Type_RCL,
G2Type_RCR,
G2Type_SHL,
G2Type_SHR,
G2Type_Unused,
G2Type_SAR
};
// --------------------------------------------------------------------------------------
// xImpl_Group2
// --------------------------------------------------------------------------------------
// Group 2 (shift) instructions have no Sib/ModRM forms.
// Optimization Note: For Imm forms, we ignore the instruction if the shift count is zero.
// This is a safe optimization since any zero-value shift does not affect any flags.
//
struct xImpl_Group2
{
G2Type InstType;
void operator()( const xRegisterInt& to, const xRegisterCL& from ) const;
void operator()( const xIndirect32orLess& to, const xRegisterCL& from ) const;
void operator()( const xRegisterInt& to, u8 imm ) const;
void operator()( const xIndirect32orLess& to, u8 imm ) const;
#if 0
// ------------------------------------------------------------------------
template< typename T > __noinline void operator()( const xDirectOrIndirect<T>& to, u8 imm ) const
{
_DoI_helpermess( *this, to, imm );
}
template< typename T > __noinline void operator()( const xDirectOrIndirect<T>& to, const xRegisterCL& from ) const
{
_DoI_helpermess( *this, to, from );
}
#endif
};
} // End namespace x86Emitter