Function mfifoGIFrbTransfer

pcsx2/Gif.cpp:513–548

}

static __fi bool mfifoGIFrbTransfer()
{
	const u32 qwc = std::min(QWCinGIFMFIFO(gifch.madr), gifch.qwc);

	if (qwc == 0) // Either gifch.qwc is 0 (shouldn't get here) or the FIFO is empty.
		return true;

	u8* src = (u8*)PSM(gifch.madr);
	if (src == NULL)
		return false;

	const u32 MFIFOUntilEnd = ((dmacRegs.rbor.ADDR + dmacRegs.rbsr.RMSK + 16) - gifch.madr) >> 4;
	const bool needWrap = MFIFOUntilEnd < qwc;
	const u32 firstTransQWC = needWrap ? MFIFOUntilEnd : qwc;
	const u32 transferred = WRITERING_DMA((u32*)src, firstTransQWC); // First part

	gifch.madr = dmacRegs.rbor.ADDR + (gifch.madr & dmacRegs.rbsr.RMSK);
	gifch.tadr = dmacRegs.rbor.ADDR + (gifch.tadr & dmacRegs.rbsr.RMSK);

	if (needWrap && transferred == MFIFOUntilEnd)
	{
		src = (u8*)PSM(dmacRegs.rbor.ADDR);
		if (src == NULL)
			return false;

		// Need to do second transfer to wrap around
		const uint secondTransQWC = qwc - MFIFOUntilEnd;
		const u32 transferred2 = WRITERING_DMA((u32*)src, secondTransQWC); // Second part

		gif.mfifocycles += (transferred2 + transferred) * 2;
	}
	else
		gif.mfifocycles += transferred * 2;

	return true;
}

static __fi void mfifoGIFchain()
{