mirror of https://github.com/PCSX2/pcsx2.git
130 lines
2.5 KiB
C++
130 lines
2.5 KiB
C++
/* GSnull
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* Copyright (C) 2002-2010 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GIF_TRANSFER_H__
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#define __GIF_TRANSFER_H__
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#include <assert.h>
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#include <algorithm>
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#include "Registers.h"
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enum GIF_FLG
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{
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GIF_FLG_PACKED = 0,
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GIF_FLG_REGLIST = 1,
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GIF_FLG_IMAGE = 2,
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GIF_FLG_IMAGE2 = 3
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};
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//
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// GIFTag
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union GIFTag
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{
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u64 ai64[2];
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u32 ai32[4];
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struct
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{
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u32 NLOOP : 15;
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u32 EOP : 1;
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u32 _PAD1 : 16;
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u32 _PAD2 : 14;
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u32 PRE : 1;
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u32 PRIM : 11;
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u32 FLG : 2; // enum GIF_FLG
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u32 NREG : 4;
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u64 REGS : 64;
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};
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void set(const u32 *data)
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{
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for (int i = 0; i <= 3; i++)
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{
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ai32[i] = data[i];
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}
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}
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GIFTag(u32 *data)
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{
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set(data);
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}
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GIFTag(){ ai64[0] = 0; ai64[1] = 0; }
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};
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// EE part. Data transfer packet description
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typedef struct
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{
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u32 mode;
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int reg;
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u64 regs;
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u32 nloop;
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int eop;
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int nreg;
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u32 adonly;
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GIFTag tag;
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void setTag(const u32 *data)
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{
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tag.set(data);
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nloop = tag.NLOOP;
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eop = tag.EOP;
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mode = tag.FLG;
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//adonly = false;
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// Hmm....
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nreg = tag.NREG << 2;
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if (nreg == 0) nreg = 64;
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regs = tag.REGS;
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reg = 0;
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//if ((nreg == 4) && (regs == GIF_REG_A_D)) adonly = true;
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// GSLog::Writeln"GIFtag: %8.8lx_%8.8lx_%8.8lx_%8.8lx: EOP=%d, NLOOP=%x, FLG=%x, NREG=%d, PRE=%d",
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// data[3], data[2], data[1], data[0],
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// path->eop, path->nloop, mode, path->nreg, tag.PRE);
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}
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u32 GetReg()
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{
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return (regs >> reg) & 0xf;
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}
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bool StepReg()
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{
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reg += 4;
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if (reg == nreg)
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{
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reg = 0;
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nloop--;
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if (nloop == 0) return false;
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}
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return true;
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}
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} pathInfo;
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extern void _GSgifPacket(pathInfo *path, const u32 *pMem);
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extern void _GSgifRegList(pathInfo *path, const u32 *pMem);
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template<int index>
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extern void _GSgifTransfer(const u32 *pMem, u32 size);
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extern GIFRegHandler GIFPackedRegHandlers[];
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extern GIFRegHandler GIFRegHandlers[];
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#endif // GIFTRANSFER_H_INCLUDED
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