mirror of https://github.com/PCSX2/pcsx2.git
56 lines
2.2 KiB
C++
56 lines
2.2 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 found here: CALL and JMP! (unconditional only)
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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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template< bool isJmp >
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class xImpl_JmpCall
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{
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public:
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xImpl_JmpCall() {}
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__forceinline void operator()( const xRegister32& absreg ) const { xOpWrite( 0x00, 0xff, isJmp ? 4 : 2, absreg ); }
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__forceinline void operator()( const ModSibStrict<u32>& src ) const { xOpWrite( 0x00, 0xff, isJmp ? 4 : 2, src ); }
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__forceinline void operator()( const xRegister16& absreg ) const { xOpWrite( 0x66, 0xff, isJmp ? 4 : 2, absreg ); }
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__forceinline void operator()( const ModSibStrict<u16>& src ) const { xOpWrite( 0x66, 0xff, isJmp ? 4 : 2, src ); }
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// Special form for calling functions. This form automatically resolves the
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// correct displacement based on the size of the instruction being generated.
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template< typename T >
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__forceinline void operator()( T* func ) const
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{
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if( isJmp )
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xJccKnownTarget( Jcc_Unconditional, (void*)(uptr)func, false ); // double cast to/from (uptr) needed to appease GCC
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else
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{
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// calls are relative to the instruction after this one, and length is
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// always 5 bytes (16 bit calls are bad mojo, so no bother to do special logic).
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sptr dest = (sptr)func - ((sptr)xGetPtr() + 5);
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xWrite8( 0xe8 );
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xWrite32( dest );
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}
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}
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};
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