77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/******************************************************************************/
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/* Mednafen Sega Saturn Emulation Module */
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/******************************************************************************/
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/* scu_dsp_mvi.cpp - SCU DSP MVI 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 dest, unsigned cond>
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static NO_INLINE NO_CLONE void MVIInstr(void)
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{
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const uint32 instr = DSP_InstrPre<looped>();
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uint32 imm;
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if(cond & 0x40)
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imm = sign_x_to_s32(19, instr);
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else
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imm = sign_x_to_s32(25, instr);
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if(DSP_TestCond<cond>())
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{
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switch(dest)
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{
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default:
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SS_DBG(SS_DBG_WARNING | SS_DBG_SCU, "[SCU] MVI unknown dest 0x%01x --- Instr=0x%08x, Next_Instr=0x%08x, PC=0x%02x\n", dest, instr, (unsigned)(DSP.NextInstr >> 32), DSP.PC);
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break;
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case 0x0:
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case 0x1:
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case 0x2:
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case 0x3:
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DSP.DataRAM[dest][DSP.CT[dest]] = imm;
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DSP.CT[dest] = (DSP.CT[dest] + 1) & 0x3F;
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break;
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case 0x4: DSP.RX = imm; break;
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case 0x5: DSP.P.T = (int32)imm; break;
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case 0x6: DSP.RAO = imm; break;
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case 0x7: DSP.WAO = imm; break;
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case 0xA: DSP.LOP = imm & 0x0FFF; break;
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case 0xC: DSP.TOP = DSP.PC - 1; DSP.PC = imm & 0xFF; break;
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}
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}
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}
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extern void (*const DSP_MVIFuncTable[2][16][128])(void) =
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{
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#include "scu_dsp_mvitab.inc"
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};
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}
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