dolphin/Source/Core/VideoBackends/Software/XFMemLoader.cpp

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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "Core/HW/Memmap.h"
#include "VideoBackends/Software/Clipper.h"
#include "VideoBackends/Software/CPMemLoader.h"
#include "VideoBackends/Software/XFMemLoader.h"
#include "VideoCommon/VideoCommon.h"
void InitXFMemory()
{
memset(&xfmem, 0, sizeof(xfmem));
}
void XFWritten(u32 transferSize, u32 baseAddress)
{
u32 topAddress = baseAddress + transferSize;
if (baseAddress <= 0x1026 && topAddress >= 0x1020)
Clipper::SetViewOffset();
// fix lights so invalid values don't trash the lighting computations
if (baseAddress <= 0x067f && topAddress >= 0x0604)
{
u32* x = xfmem.lights;
// go through all lights
for (int light = 0; light < 8; light++)
{
// skip to floating point values
x += 4;
for (int i = 0; i < 12; i++)
{
u32 xVal = *x;
// if the exponent is 255 then the number is inf or nan
if ((xVal & 0x7f800000) == 0x7f800000)
*x = 0;
x++;
}
}
}
}
void SWLoadXFReg(u32 transferSize, u32 baseAddress, u32 *pData)
{
// do not allow writes past registers
if (baseAddress + transferSize > 0x1058)
{
INFO_LOG(VIDEO, "XF load exceeds address space: %x %d bytes", baseAddress, transferSize);
if (baseAddress >= 0x1058)
transferSize = 0;
else
transferSize = 0x1058 - baseAddress;
}
// write to XF regs
if (transferSize > 0)
{
memcpy((u32*)(&xfmem) + baseAddress, pData, transferSize * 4);
XFWritten(transferSize, baseAddress);
}
}
void SWLoadIndexedXF(u32 val, int array)
{
int index = val >> 16;
int address = val & 0xFFF; //check mask
int size = ((val >> 12) & 0xF) + 1;
//load stuff from array to address in xf mem
u32 *pData = (u32*)Memory::GetPointer(arraybases[array] + arraystrides[array]*index);
// byteswap data
u32 buffer[16];
for (int i = 0; i < size; ++i)
buffer[i] = Common::swap32(*(pData + i));
SWLoadXFReg(size, address, buffer);
}