pcsx2/plugins/GSnull/GifTransfer.h

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