mirror of https://github.com/PCSX2/pcsx2.git
56 lines
3.7 KiB
C++
56 lines
3.7 KiB
C++
/* Pcsx2 - Pc Ps2 Emulator
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* Copyright (C) 2002-2009 Pcsx2 Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#pragma once
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// Implementations here cover SHLD and SHRD.
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// Note: This header is meant to be included from within the x86Emitter::Internal namespace.
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//////////////////////////////////////////////////////////////////////////////////////////
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// I use explicit method declarations here instead of templates, in order to provide
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// *only* 32 and 16 bit register operand forms (8 bit registers are not valid in SHLD/SHRD).
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//
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// Optimization Note: Imm shifts by 0 are ignore (no code generated). This is a safe optimization
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// because shifts by 0 do *not* affect flags status.
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//
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template< bool isShiftRight >
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class DwordShiftImplAll
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{
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static const u8 m_shiftop = isShiftRight ? 0x8 : 0;
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public:
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// ---------- 32 Bit Interface -----------
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__forceinline void operator()( const xRegister32& to, const xRegister32& from, __unused const xRegisterCL& clreg ) const { xOpWrite0F( 0xa5 | m_shiftop, to, from ); }
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__forceinline void operator()( void* dest, const xRegister32& from, __unused const xRegisterCL& clreg ) const { xOpWrite0F( 0xa5 | m_shiftop, from, dest ); }
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__forceinline void operator()( const ModSibBase& dest, const xRegister32& from, __unused const xRegisterCL& clreg ) const { xOpWrite0F( 0xa5 | m_shiftop, from, dest ); }
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__forceinline void operator()( const xRegister32& to, const xRegister32& from, u8 shiftcnt ) const { if( shiftcnt != 0 ) xOpWrite0F( 0xa4 | m_shiftop, to, from ); }
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__forceinline void operator()( void* dest, const xRegister32& from, u8 shiftcnt ) const { if( shiftcnt != 0 ) xOpWrite0F( 0xa4 | m_shiftop, from, dest, shiftcnt ); }
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__forceinline void operator()( const ModSibBase& dest, const xRegister32& from, u8 shiftcnt ) const { if( shiftcnt != 0 ) xOpWrite0F( 0xa4 | m_shiftop, from, dest, shiftcnt ); }
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// ---------- 16 Bit Interface -----------
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__forceinline void operator()( const xRegister16& to, const xRegister16& from, __unused const xRegisterCL& clreg ) const { xOpWrite0F( 0x66, 0xa5 | m_shiftop, to, from ); }
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__forceinline void operator()( void* dest, const xRegister16& from, __unused const xRegisterCL& clreg ) const { xOpWrite0F( 0x66, 0xa5 | m_shiftop, from, dest ); }
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__forceinline void operator()( const ModSibBase& dest, const xRegister16& from, __unused const xRegisterCL& clreg ) const { xOpWrite0F( 0x66, 0xa5 | m_shiftop, from, dest ); }
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__forceinline void operator()( const xRegister16& to, const xRegister16& from, u8 shiftcnt ) const { if( shiftcnt != 0 ) xOpWrite0F( 0x66, 0xa4 | m_shiftop, to, from ); }
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__forceinline void operator()( void* dest, const xRegister16& from, u8 shiftcnt ) const { if( shiftcnt != 0 ) xOpWrite0F( 0x66, 0xa4 | m_shiftop, from, dest, shiftcnt ); }
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__forceinline void operator()( const ModSibBase& dest, const xRegister16& from, u8 shiftcnt ) const { if( shiftcnt != 0 ) xOpWrite0F( 0x66, 0xa4 | m_shiftop, from, dest, shiftcnt ); }
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DwordShiftImplAll() {} // Why does GCC need these?
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};
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