70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
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/******************************************************************************/
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/* Mednafen Sega Saturn Emulation Module */
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/******************************************************************************/
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/* scu_dsp_misc.cpp - SCU DSP Miscellaneous Instructions Emulation
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** Copyright (C) 2015-2016 Mednafen Team
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public License
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** as published by the Free Software Foundation; either version 2
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** of the License, or (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 Foundation, Inc.,
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** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "ss.h"
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#include "scu.h"
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#pragma GCC optimize("Os")
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namespace MDFN_IEN_SS
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{
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#include "scu_dsp_common.inc"
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template<bool looped, unsigned op>
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static NO_INLINE NO_CLONE void MiscInstr(void)
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{
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DSP_InstrPre<looped>();
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//
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// END/ENDI
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//
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if(op == 2 || op == 3)
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{
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if(op & 0x1)
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{
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DSP.FlagEnd = true;
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SCU_SetInt(SCU_INT_DSP, true);
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}
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DSP.NextInstr = DSP_DecodeInstruction(0);
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DSP.State &= ~DSPS::STATE_MASK_EXECUTE;
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DSP.CycleCounter -= DSP_EndCCSubVal; // Break out of execution loop(also remember to handle this case for manual stepping via port writes).
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}
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else if(op == 0) // BTM
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{
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if(DSP.LOP)
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{
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DSP.LOP--;
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DSP.PC = DSP.TOP;
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}
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}
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else if(op == 1) // LPS
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{
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DSP.NextInstr = DSP_DecodeInstruction<true>(DSP.NextInstr >> 32);
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}
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}
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extern void (*const DSP_MiscFuncTable[2][4])(void) =
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{
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#include "scu_dsp_misctab.inc"
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};
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}
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